Intelligent type valve electrical device

Abstract

The intelligence valve electrically controlled installment belongs uses the sensor monitor and the micro electron technology control valves uses the electrically operated installment. The main characteristic is: In the mechanism which has has partially established the non- electronic contact type examination output shaft torque value the strength value sensor and the examination valve operates the electro-optical sensor, in the electric motor supposes the temperature sensor; Its electric control are partial is the modular microcomputer control system, in is equipped with AVR high speed to insert the type monolithic integrated circuit the controller module, receives various sensors the monitor signal to control the power control module after processing, then control motor active status. This invention solved the traditional technology to plant the structure complex, security bad, difficult problem and so on reliability, this equipment was the light integration of machinery high tech product, its structure simple, security good, precision high, the reliability was high, could to the valve entire work process realization automatic monitor and the monitoring.

Description

technical field [0001] The invention relates to an electric device for a valve using sensor detection and microelectronic technology control. The device is matched with the valve to form an electric valve to implement automatic control and management of the medium parameters conveyed in the pipe network system. Background technique [0002] The current national professional standard for valve electric devices JB / T8528-1997 stipulates that it is applicable to ordinary type valves such as motor drive, electric contact control, single speed gate valve, globe valve, throttle valve, diaphragm valve, ball valve and butterfly valve. electric device". This type of electric device is based on the reduction mechanism driven by the motor. The main body is equipped with springs, mechanical gears, counters, cams, potentiometers, contacts and other mechanisms to detect and control the valve opening and valve torque. , The operation of the valve is completed by electromechanical control. ...

AI Technical Summary

Problems solved by technology

[0003] 1. The structure is complex: the main reducer part is a mechanical structure, while the control part is an electromechanical structure, such as the torque control mechanism DSW and the valve opening control mechanism

[0004] 2. Low accuracy of output shaft torque detection and valve opening detection: the detection value is transmitted through gears, amplified by a counter, and then output through potentiometers, cams and contacts. After such a complicated electromechanical process, its accuracy There will be a lot of distortion, especially the detection value of the torque, which is output after being amplified by the deformation of the spring under the action of an external force, and the torque accuracy is only ±7~10%, which cannot be further improved

In addition, due to the limitation of the number of mechanical contacts on the cam, the output detection value can only be a discontinuous analog signal

However, intermittent analog signals cannot meet the requirements of networking

[0005] 3. Poor use safety: the output of the cam and contact works under the condition of strong electricity, it is very easy to cause poor contact or ignition, and there are great hidden dangers

[0006] 4. Low working reliability: The counter of the existing valve electric device is an instrument gear structure. The contact signal value is determined by manually adjusting the screw (positioning) with a screwdriver. Often, the gear meshing is not in place and the positioning is inaccurate, resulting in failure. Or accidents often occur, seriously affecting the reliability of electric valve work

[0007] 5. The closing zero point will drift: the existing valve electric device, the initial closing position (zero point) will change with the deformation and wear of the valve sealing surface and the torque when the valve is closed during the use of the electric valve. change

The problem of zero point drift at the closing point is difficult to solve for electromechanically controlled electric valves, which will have serious consequences for the sealing performance of electric valves in long-term use

[0008] 6. A single opening and closing speed is likely to cause water hammer phenomenon: because the existing valve electric device has a single speed in the working process, it is easy to cause "water hammer" phenomenon when the valve with a larger diameter in the pipe network system is closed. , so that there will be a dangerous accident of pipe explosion in the pipe network system

Images