Frequency conversion type intellective electromotion unit for valve

A valve electric and intelligent technology, applied in valve device, valve operation/release device, AC motor control and other directions, can solve problems such as water hammer, precision distortion, pipe burst in pipe network system, etc., to improve detection and control accuracy , the effect of reducing volume and cost, and improving operational reliability

Inactive Publication Date: 2009-07-15
孙力
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the widely used valve electric devices all use AC voltage to directly drive the motor, and drive the valve to run through the mechanical transmission device, causing the starting current of the motor to increase exponentially. At the same time, the motor speed remains unchanged during the entire valve operation process, and the valve opening and closing speed remains unchanged , when the larger-diameter valves in the pipe network system are closed, water hammer phenomenon is easily generated, causing dangerous accidents such as pipe bursts in the pipe network system
[0003] On the other hand, the existing electric devices all adopt the mechanical torque detection method, which is easily affected by the deformation of the mechanical structure and the change of the ambient temperature, and the detection accuracy is easily affected, and at the same time, the volume of the device is complicated.
[0004] In addition, most of the valve position detection methods of existing electric devices use gear transmission, counter amplification, and then output through potentiometers, cams and contacts. After such a complicated electromechanical process, its accuracy will be greatly distorted. High-precision measurement cannot be achieved. In addition, due to the limitation of the number of mechanical contacts on the cam, the output detection value can only be an intermittent analog signal, and the intermittent analog signal cannot meet the requirements of networked automatic control.

Method used

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  • Frequency conversion type intellective electromotion unit for valve
  • Frequency conversion type intellective electromotion unit for valve
  • Frequency conversion type intellective electromotion unit for valve

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0038] combine figure 1 , This embodiment includes a main controller module 1, a variable frequency drive module 2, an asynchronous motor 3, a mechanical transmission device 4, a temperature sensor 5, a multi-turn absolute encoder 6, a liquid crystal display 7 and an operation mode selection knob 8.

[0039] 1. The mechanical part of the frequency conversion intelligent valve electric device:

[0040] The mechanical transmission device 4 still adopts the mechanical part of the original ordinary valve electric device, the difference is that the torque detection and the valve opening detection of the original mechanical part are cancelled, and only the manual electric conversion mechanism is retained. , Reduction mechanism, and the main drive output set. In this way, the complexity of the mechanical transmission device is effectively reduced, and the...

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Abstract

The invention relates to a variable frequency intelligent valve electric device. It includes main controller module (1), variable frequency drive module (2), asynchronous motor (3), mechanical transmission device (4), temperature sensor (5), multi-turn absolute encoder (6), liquid crystal display (7 ) and the operating mode selection knob (8). Its main feature is that the asynchronous motor is driven by a variable frequency drive module, the output torque is detected by means of electricity consumption calculation, and a multi-turn absolute encoder is used as a position sensor, and a temperature sensor is installed in the asynchronous motor. The control methods include local control, remote operation, remote switch control, remote analog control, and bus control. The invention has the advantages of small size, high reliability, flexible opening and closing of valves, effective elimination of "water hammer" phenomenon, fast and accurate torque protection, easy network control and the like.

Description

(1) Technical field [0001] The invention relates to a valve electric device, in particular to a frequency conversion intelligent valve electric device. (2) Background technology [0002] At present, the widely used valve electric devices all use AC voltage to directly drive the motor, and drive the valve to run through the mechanical transmission device, causing the starting current of the motor to increase exponentially. At the same time, the motor speed remains unchanged during the entire valve operation process, and the valve opening and closing speed remains unchanged , when the larger-diameter valves in the pipe network system are closed, water hammer is easily generated, causing dangerous accidents such as pipe bursts in the pipe network system. [0003] On the other hand, the existing electric devices all adopt the mechanical torque detection method, which is easily affected by the deformation of the mechanical structure, the change of the ambient temperature and othe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/04H02P27/06G08C19/00
Inventor 孙力吴凤江刘大为赵克
Owner 孙力
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