CN211175560U - An intelligent electric actuator for flow monitoring valve - Google Patents

Abstract

The utility model discloses an intelligent electric actuator for a flow monitoring valve, which comprises an electric execution unit, an angular displacement sensor, a pressure sensor, a temperature sensor, a human-computer interaction unit, a cloud interaction unit, a storage unit and a power supply unit. Used to rotate the valve, the angular displacement sensor is used to obtain the precise position of the current valve; the pressure sensor is used to obtain the pressure value data upstream and downstream of the valve; the temperature sensor is used to obtain the temperature of the fluid in the pipeline; the human-computer interaction module is used to The device performs data communication; the storage module is used to store historical flow information, historical fault information, and historical temperature information; the power module is used to supply the normal work of the entire system and power supply to each module. The utility model can realize many practical functions such as flow monitoring, flow regulation, fault prediction, fault alarm, remote data interaction, etc. The whole system conforms to the practical application scenarios and era backgrounds of intelligence, automation and Internet of Things.

Description

An intelligent electric actuator for flow monitoring valve

technical field

The utility model belongs to the technical field of valves, in particular to an intelligent electric actuator for flow monitoring valves.

Background technique

The valve is a control component in the fluid conveying system, which has the functions of cut-off, regulation, diversion, prevention of backflow, voltage stabilization, diversion or overflow and pressure relief. The actuator is the main part of the control valve. It can be used to control the rotation angle of the valve to control the corresponding valve opening, so as to control the air, water, steam, various corrosive media, mud, oil, etc. in the pipeline. The purpose of the flow of various types of fluids such as liquid metals and radioactive media.

Most of the current electric actuators simply control the valve opening, which can control the valve position to be fully open or fully closed, but cannot effectively control the flow value in the pipeline, that is, it cannot automatically adjust the valve opening according to the flow rate. Spend. At the same time, it does not have the function of wireless communication and closed-loop adjustment control.

Obtaining flow data needs to rely on related equipment such as flowmeters, resulting in complex overall structure of the equipment, huge volume, cumbersome assembly, and the flowmeter data and actuator data cannot form an effective data interaction, which is also a defect.

There is also a lack of corresponding fault monitoring equipment in practical engineering applications. When the fluid conveying system fails and is abnormal, the valve cannot give a timely alarm, and it is impossible to know the exact position of the pipeline. The fault can only be eliminated by manual inspection, which costs a lot of money. Human and material resources and inefficiency.

The fluid-related data in the pipeline cannot be stored and analyzed, and the fluid temperature cannot be known. Therefore, some avoidable accidents cannot be avoided, resulting in significant economic losses. Secondly, the staff cannot control the valve opening remotely and wirelessly to exchange data in the cloud.

For many practical project requirements such as flow controllable, flow checkable, abnormal controllable, fault alarm, historical storage, data analysis, etc., there is an urgent need for an electric actuator with complete functions and reliable operation, which is easy to install and disassemble and can be directly obtained. Pipe flow and control flow and other in-pipe fluid data.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides an intelligent electric actuator for a flow monitoring valve, which can meet the requirements of energy saving, maintenance cost reduction, safety and reliability, and the like.

In order to achieve the above purpose, the technical solution adopted by the present invention is: an intelligent electric actuator for flow monitoring valve, which includes an electric execution unit, and is characterized in that: it also includes a control unit, and includes a signal acquisition unit that is respectively connected with the control unit. unit, human-computer interaction unit, cloud interaction unit, storage unit and power supply unit, and the control unit is connected with the electric execution unit through the output control circuit;

The signal acquisition unit includes a pressure sensor, a temperature sensor and an angular displacement sensor,

The pressure sensor collects the medium pressure data in the upstream and downstream pipelines at both ends of the valve and transmits the data to the control unit.

The temperature sensor collects the medium temperature data in the upstream and downstream pipelines at both ends of the valve and transmits it to the control unit.

The angular displacement sensor collects the valve opening data and transmits it to the control unit;

The human-computer interaction unit includes an input module, a liquid crystal display module, and an alarm module. The output end of the input module is connected to the control unit, and the output end of the control unit is respectively connected to the liquid crystal display module and the alarm module.

The cloud interaction unit includes a cloud server, and the cloud server is connected with the control unit through a networking module;

The storage unit forms cloud data interaction with the control unit through the signal transmission module.

Further, the pressure sensor is connected with the control unit through the 485 module.

Further, the output control circuit is connected with the control unit through a 485 module.

Further, the electric execution unit performs data interaction with the output control circuit through the built-in MODBUS communication protocol.

Further, the storage unit adopts W25Q64 Flash memory.

Further, the cloud server performs data interaction with the user's PC or the user's smart phone through a signal transmission module.

By adopting the above scheme, the utility model can directly obtain the current flow data of the pipeline according to the value of the pressure sensors installed on the upstream and downstream of the valve, monitor the temperature of the fluid in the pipeline through the temperature sensor, and perform real-time abnormal flow monitoring and historical flow information storage and query. Users can In the field, the target flow value is set by adding and subtracting the human-computer interaction unit, and the electric execution unit automatically adjusts the current flow to the target flow, and can regularly upload the data to the cloud server. Users can connect with the cloud server through the smartphone APP and PC. The real-time adjustment and query of the flow can remotely open and close the valve.

The present utility model will be further described below in conjunction with the accompanying drawings.

Description of drawings

Accompanying drawing 1 is the overall system block diagram of the specific embodiment of the present utility model;

Accompanying drawing 2 is the structural schematic diagram of the placement position of the pressure sensor according to the specific embodiment of the present utility model;

Accompanying drawing 3 is the flow coefficient acquisition model data diagram based on the specific embodiment of the present utility model;

4 is a schematic block diagram of data communication between a smartphone, a PC terminal and the cloud according to a specific embodiment of the present invention;

Human-computer interaction unit 17, input module 1, liquid crystal display circuit 11, power supply circuit 2, pressure feedback 3, temperature feedback 5, valve opening position feedback 6, output control circuit 7, storage module 10, networking module 8, cloud interaction unit 9. Electric execution unit 16 , cloud server 18 , smart phone terminal 14 , user PC terminal 12 , user PC terminal 13 .

Detailed ways

A specific embodiment of the present utility model is shown in Figures 1-4, which is a monitoring electric actuator of an intelligent flow valve, which includes an electric execution unit 16, a control unit, a signal acquisition unit, a human-computer interaction unit 17, a storage unit 10, and a cloud interaction unit. 9 and the power supply unit 2, the control unit is purchased by the technicians according to the conventional requirements of the processor MCU on the market, the processor MCU is connected with the electric execution unit 16 through the output control circuit 7; when the output control circuit 7 exchanges data with the processor, the communication The protocol adopts MODBUS protocol, and the communication data needs to be checked by CRC of both parties. Specifically, the MODBUS protocol card adopts a two-wire half-duplex RS485 interface, which can be configured to identify bus parameters such as baud rate, device address, and parity bit. Among them, the processor MCU adopts the enhanced 51 series (AT89 series) one-chip computer produced by American Atmel Company as the core. Of course, due to the development of chip technology, for those skilled in the art, there are many possibilities for the selection of the processor MCU, so we will not give examples one by one here.

The signal acquisition unit includes a pressure feedback 3, a temperature feedback 5 and a valve opening position feedback 6, and the signals are collected by a pressure sensor, a temperature sensor and an angular displacement sensor respectively;

The pressure sensor is placed at the upstream and downstream ends of the actuator. When it collects the medium pressure data in the upstream and downstream pipelines of the valve, it transmits data to the processor MCU through serial communication; when the pressure sensor detects the leakage of the medium fluid in the pipeline, it processes the The MCU transmits the alarm signal to the alarm module, and the alarm module sends out the alarm information, and the control loss is further expanded.

The temperature sensor is placed in the pipeline to measure the temperature of the fluid in the pipeline. When it collects the medium temperature data in the upstream and downstream pipelines at both ends of the valve and transmits it to the processor MCU; when the temperature is too high, the processor MCU transmits an alarm signal The alarm information is sent to the alarm module by the alarm module.

The angular displacement sensor collects the valve opening data and transmits it to the processor MCU; the valve body opening and closing position detected by the angular displacement sensor and the pressure data obtained by the pressure sensor can be used to know the current flow data in the pipeline.

The acquisition principle of the flow in the pipeline is as follows: two pressure sensors are placed at the two ends of the pipeline respectively 10D away from the electric actuator (D is the diameter of the pipeline), as shown in Figure 2, to obtain the pressure data of the two pressure sensors and then cooperate with the angular displacement sensor. The obtained valve opening position, using a large amount of experimental data (refer to Figure 3) and MATLAB software to analyze the formulas for flow, differential pressure and opening suitable for pipeline scenarios. From this, the instantaneous flow in the current pipeline is calculated, and then with the electric actuator, the flow can be adjusted in real time.

Real-time adjustment can be done through on-site human-computer interaction, or through cloud-based interactive remote operation.

The human-computer interaction unit 17 includes an input module 1 (keyboard, voice, touch screen), a liquid crystal display module 11, and an alarm module. The output end of the input module 1 is connected to the processor MCU, and the output end of the processor MCU is respectively connected to the liquid crystal display module 11 and the alarm module. , the input module 1 can use keyboard input, voice input or touch screen input to modify some parameters of the electric execution unit 16, regulate the flow rate or inquire about the location and running status of the electric execution unit 16, etc. It should be able to prompt the user of the current device operating state. The alarm module includes an indicator light and a buzzer. When the medium leaks in the pipeline or the temperature is too high (it can be known by the signal acquisition unit), the alarm module sends out an alarm signal (the indicator light flashes and the buzzer sounds), which can avoid greater the occurrence of losses. When the angular displacement sensor detects that the valve adjustment opening is equal to 100% or equal to 0%, the signal is transmitted to the processor MCU, and the alarm module sends an alarm signal, and the output control circuit 7 transmits a signal to the electric execution unit 16 to immediately stop opening Or close the valve; in addition, when the signal is lost and the processor MCU does not receive valid data, the alarm module sends an alarm signal, and the output control circuit 7 transmits a signal to the electric execution unit 16 to stop operation. The output control circuit 7 of the electric execution unit 16 adopts a mature existing circuit structure design, such as the conventional circuit structure design such as the output circuit disclosed in the application number CN201210372303.7.

The cloud interaction unit 9 includes a cloud server, and the cloud server is connected to the processor MCU through the networking module 8. The networking module 8 is selected but not limited to ESP8266, which is used to configure network access, allowing users to remotely communicate with the actuator through the network. The storage unit 10 selects but is not limited to W25Q64 Flash memory, and realizes data transmission through WiFi. It can store historical flow data, historical temperature data, and historical fault data, and has the characteristics of no loss when power off, and can be used for remote and on-site real-time query.

Users can remotely control the site through cloud interaction, and can view equipment operating data and status, and support the display of flow data, temperature data, and fault data in the form of graphs. Field data changes can also be sent to the cloud server through the networking module 8. When viewing, you can view the instantaneous flow data in a certain period of time in real time, and you can also view the historical flow data. At the same time, the temperature, flow coefficient, fault type, and fault frequency can also be displayed on the liquid crystal display in the form of graphs and other charts, which is convenient for users. Intuitive query.

The power supply unit 2 includes a step-down circuit, a filter rectifier circuit, an output circuit and a protection circuit. The power supply circuit adopts the existing technology, such as the conventional circuit design of the step-down circuit, filter rectifier circuit and other structures disclosed in the patent number CN20082014299.1. The power supply unit 2 is reduced from 220V AC voltage to 5V DC, rectified and filtered, and supplied to the processor MCU, liquid crystal display screen, input module 1, storage unit 10, networking module 8, temperature sensor, pressure sensor, etc. The power supply unit 2, the input module 1 (the keyboard input method is adopted in this embodiment), the liquid crystal display screen, the storage unit 10, and the networking module 8 are directly connected to the IO port of the processor, while the signal acquisition module and the output control circuit 7 are connected through the TTL After the 485 module is transferred, it is connected with the processor MCU by serial communication.

The electric actuator of the utility model can realize flow monitoring, flow control, temperature monitoring, fault prediction, fault alarm, multi-terminal interaction and many other functions that meet the actual needs of the market. Users can adjust and query the flow in real time by connecting to the cloud server through the smartphone 14 APP and the PC terminals 12 and 13, and can remotely open and close the valve. It breaks the barriers that require multiple components to cooperate with each other, inconvenient installation and disassembly, and high cost in actual projects. It integrates practicality and marketization, and solves the problem of difficult system debugging and maintenance. Therefore, the utility model effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

The present invention is not limited to the above-mentioned specific embodiments. Those skilled in the art can adopt other various specific embodiments to implement the present invention according to the content disclosed in the present invention, or use the design structure and ideas of the present invention. Simple changes or modifications fall within the protection scope of the present invention.

Claims (6)

1. The utility model provides an intelligent electric actuator of flow monitoring valve, its includes electronic execution unit, its characterized in that: the intelligent control system also comprises a control unit, a signal acquisition unit, a man-machine interaction unit, a cloud interaction unit, a storage unit and a power supply unit, wherein the signal acquisition unit, the man-machine interaction unit, the cloud interaction unit, the storage unit and the power supply unit are respectively connected with the control unit;

the signal acquisition unit comprises a pressure sensor, a temperature sensor and an angular displacement sensor,

the pressure sensor collects medium pressure data in upstream and downstream pipelines at two ends of the valve and then transmits the data with the control unit,

the temperature sensor collects the medium temperature data in the upstream and downstream pipelines at the two ends of the valve and then transmits the data to the control unit,

the angular displacement sensor collects valve opening data and transmits the data to the control unit;

the human-computer interaction unit comprises an input module, a liquid crystal display module and an alarm module, the output end of the input module is connected with the control unit, the output end of the control unit is respectively connected with the liquid crystal display module and the alarm module,

the cloud interaction unit comprises a cloud server, and the cloud server is connected with the control unit through a networking module;

the storage unit forms cloud data interaction with the control unit through the signal transmission module.

2. The intelligent electric actuator of a flow monitoring valve according to claim 1, wherein: the pressure sensor is connected with the control unit through a 485 module.

3. The intelligent electric actuator of a flow monitoring valve according to claim 1, wherein: the output control circuit is connected with the control unit through a 485 module.

4. The intelligent electric actuator of a flow monitoring valve according to claim 1, wherein: and the electric execution unit performs data interaction with the output control circuit through a built-in MODBUS communication protocol.

5. The intelligent electric actuator of a flow monitoring valve according to claim 1, wherein: the storage unit adopts a W25Q64 Flash memory.

6. The intelligent electric actuator of a flow monitoring valve according to claim 1, wherein: and the cloud server performs data interaction with a user PC or a user smart phone through a signal transmission module.

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