Electric butterfly valve

Abstract

The invention discloses an electric butterfly valve, which comprises a valve body. The valve body is internally provided with a channel penetrating through from left to right; a baffle plate is arranged on the inner side wall of the channel, and is provided with a valve port; the valve body is internally and rotatably connected with a rotating shaft, and the rotating shaft is fixedly provided witha flap plate; the outer side of the valve body is fixedly provided with a motor; the flap plate is provided with a first valve hole and a second valve hole, the second valve hole is internally and fixedly provided with a valve sleeve, and a magnetic guide sleeve is fixedly arranged on the opening of the right end of the first valve hole; the valve sleeve is internally provided with a sliding holepenetrating through from left to right; the sliding hole is internally and slidably connected with a valve core; a spring seat is fixedly arranged at the right end of the valve core, and the valve core is connected with a first spring in a sleeved mode; the right end of the magnetic guide sleeve is slidably connected with a moving iron, and the magnetic guide sleeve is provided with a push rod; acoil is arranged at the side face of the outer circumference of the magnetic guide sleeve; before the electric butterfly valve is opened, mediums at the two ends of the butterfly valve are in communication in advance to reduce a pressure difference between the two sides, and thus power of the motor does not increase suddenly when the flap plate is controlled to rotate.

Description

technical field [0001] The invention belongs to the field of pipeline valves, in particular to an electric butterfly valve. Background technique [0002] Butterfly valve, also known as flap valve, is a kind of regulating valve with simple structure, which mainly plays the role of cutting off and throttling on the pipeline. The butterfly valve opening and closing part is a disc-shaped flap that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjustment. With the development of the industry, the use of electric butterfly valves has also increased; when the electric butterfly valve is in use, there will generally be a large pressure difference on both sides of the flap, so a larger torque will be required when the butterfly valve is opened, but When the butterfly valve is opened to a certain angle, the motor torque required by the pressure difference decreases, so in order to meet the starting torque, a larger power motor needs to...

AI Technical Summary

Problems solved by technology

With the development of industry, the application of electric butterfly valve also increases; when the electric butterfly valve is in use, there is generally a large pressure difference between the two sides of the flap, so a large torque is required when the butterfly valve is opened, but When the butterfly valve opens to a certain angle, the required motor torque decreases due to the decrease in pressure difference, so in order to meet the starting torque, a larger power motor is required, and the larger torque when the butterfly valve is opened is not conducive to the long-term use of the butterfly valve

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