Improved connecting rod drive mechanism of butterfly valve plate

Abstract

The invention belongs to butterfly valve components and particularly relates to an improved connecting rod drive mechanism of a butterfly valve plate. The improved connecting rod drive mechanism comprises a valve body, a valve plate and a push-pull drive shaft which is located in the valve body and longitudinally driven by a parallel push-pull mechanism. The valve plate is located in the valve body, a triangular plate is perpendicular to the valve plate and a main shaft, the top end of the triangular plate is connected with the main shaft in a matched manner, the inner end of the lower portion of the triangular plate is hinged to a fixing base on the valve plate, the outer end of the lower portion of the triangular plate and the lower end of the push-pull drive shaft are movably assembled, and the valve plate achieves sealed locking or separating in a manner that the push-pull drive shaft drives the triangular plate and a medium conveying channel formed in the valve body. The two ends of the main shaft are in rotation fit with the inner wall of the valve body, the main shaft is driven by a rotary drive mechanism, and the main shaft and the triangular plate synchronously rotate in the radial direction. The improved connecting rod drive mechanism effectively solves the technical problem that in the prior art, the reverse sealing effect is poor due to single drive. The improved connecting rod drive mechanism has the beneficial effects that bi-drive can effectively increase force, and a certain reverse sealing property is achieved while the forward sealing effect is guaranteed.

Description

technical field [0001] The invention belongs to a butterfly valve component, in particular to an improved connecting rod driving mechanism of a butterfly valve plate. Background technique [0002] As an important part of the equipment manufacturing industry, the valve industry plays a very important role in the development of the national economy. There are many valve industry chains in China, but it is not a valve powerhouse. Generally speaking, my country has entered the ranks of the world's valve powers, but there is still a certain gap between my country and the valve power in terms of product quality. The industry's low production concentration, low R&D capabilities for high-end valves, and low manufacturing technology in the valve industry still exist. Many high-parameter, high-temperature, high-pressure, and high-pound key valves have always relied on imports. In order to promote the localization of valves, after the "Several Opinions on Accelerating the Revitalizati...

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Problems solved by technology

[0007]First, the driving power is limited and the supporting power source is required to be high. Because it adopts a single driving method for the valve stem, the valve plate can be sealed under the premise of ensuring the sealing effect. The stress applied on the valve is limited. Since the driving force of the valve plate is input through the valve stem, the power input requirements for the supporting power source are high, and the structural deformation of the valve stem and other transmission components is limited by the input power.

The second is that in practical applications, due to the reverse air wave impact of the sealing pair, resonance in the medium transmission process, etc., it is easy to cause the problem that the reverse sealing effect of the sealing pair is not easy to guarantee due to the weakening of the pressure.

[0008] To sum up, how to improve and optimize the design of the connecting rod transmission mechanism of the valve plate, so as to further increase the positive pressure on the valve plate, and meet the guarantee Under the premise of positive sealing effect, solving the problem that the sealing effect is not easy to guarantee due to low pressure and external factors in the reverse sealing process is not only one of the technical problems that plague the technicians in the field, but also a problem that is applied to One of the main research directions for the structural design of butterfly valves in medium conveying pipelines in high temperature environments

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