Dual-sealing butterfly valve with overhaul sealing ring driven by servo motor

Abstract

The invention discloses a dual-sealing butterfly valve with an overhaul sealing ring driven by a servo motor. A valve body working sealing ring is arranged at a water outlet in a valve body; the valve body overhaul sealing ring is arranged at a water inlet in the valve body; a butterfly plate rubber sealing ring and a butterfly plate overhaul sealing ring are arranged on a butterfly plate; holes are uniformly distributed in a valve body barrel; the valve body overhaul sealing ring is provided with a radial handle; a short water inlet pipe is connected to the water inlet of the valve body; the servo motor corresponding to the radial handle is arranged on the short water inlet pipe; nut seats are uniformly distributed on the short water inlet pipe; a nut connected with the shaft of the servo motor is arranged on each nut seat; and a screw rod connected with the corresponding radial handle is screwed in each nut. A drive device for the valve body overhaul sealing ring of the dual-sealing butterfly valve disclosed by the invention is the servo motor, and good in synchronization effect and higher in automation degree; the valve body overhaul sealing ring is higher in action reliability; the phenomena of inclination, blockage and the like are avoided; pollution to a medium in a pipeline is avoided; opening, closing and turning can be adjusted in real time; the smooth slide of the valve body overhaul sealing ring can be much accurately ensured; and a corresponding long-distance transmission signal can be output in the whole stroke range of a valve body overhaul sealing pair switch to display the real-time position of the overhaul ring.

Description

technical field [0001] The invention relates to a double-channel sealing butterfly valve that adopts a servo motor to drive the maintenance seal ring, in particular to a valve body inspection seal ring servo motor drive device for the double-channel seal butterfly valve that adopts a servo motor to drive the maintenance seal ring. Background technique [0002] The butterfly valve is a valve in which the butterfly plate rotates 90 degrees in the valve body to realize the opening and closing of the valve. The butterfly valve has a sealing pair consisting of a butterfly plate sealing ring and a valve body sealing ring. [0003] In order to facilitate the maintenance of the sealing pair, there are working sealing pairs and inspection sealing pairs between the butterfly plate and the valve body of the water inlet butterfly valve of large-scale water conservancy projects. The working sealing pair has a butterfly plate rubber sealing ring with good sealing performance, and the insp...

AI Technical Summary

Problems solved by technology

However, because it is hydraulically driven, the driving pressure of the hydraulic cylinder will vary with the load, and the driving oil pressure of each driving cylinder will be different due to the weight of the valve body maintenance seal ring, and the uneven output force of the oil pressure may cause To check the inclination and jamming of the sealing ring, and need to be equipped with a hydraulic station system, the structure is complex, maintenance is troublesome, the cost is high, and the medium in the pipeline may be polluted during use

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