Sealing valve

Abstract

The invention discloses a sealing valve which comprises a box body, a cylinder body extending into the box body, a valve seat fixedly arranged at an outlet of the cylinder body, a valve plate covered on the valve seat to play a sealing role and a valve plate opening and closing device for controlling the valve plate to act. The invention has the beneficial effects that the valve plate opening andclosing device adopts a crank structure and is in transmission with a synchronizing device; the action of first translation and then turnover of the valve plate is realized, so that the device structure is effectively simplified, the movement space of the valve plate is reduced, and the power consumption is reduced; the two ends of a transmission arm with a U-shaped structure of the valve plate are respectively connected with a crank to form a simply-supported beam structure; compared with a transmission arm with a cantilever beam structure in the prior art, the transmission arm has better stress condition, better rigidity and intensity and is not easy to deform or break; meanwhile, each of transmission half shafts of the valve plate adopts a transmission structure of a bilateral solid shaft; and compared with a unilateral hollow shaft in the prior art, the solid shaft has a coaxial transmission structure, is simpler in structure and has low manufacturing and maintenance difficulty.

Description

technical field [0001] The invention relates to a sealing valve device, in particular to a sealing valve device matched with a material flow regulating valve in a shaft furnace charging system. Background technique [0002] When charging shaft furnaces, especially blast furnaces, the raw materials are generally loaded into the top cylinder first, and then the raw materials are loaded from the cylinder into the furnace through the material flow regulating valve. Due to the certain pressure in the furnace during the production process of the shaft furnace, in order to avoid the leakage of the gas in the furnace, a sealing valve is usually used to isolate the gas in the furnace from the outside world during the process of charging the cylinder. [0003] In the prior art, the valve plate of the top sealing valve of the shaft furnace generally has two actions of turning over and pressing when working, which are respectively driven by two oil cylinders. In order to achieve the ab...

AI Technical Summary

Problems solved by technology

In order to achieve the above two actions, the driving arm of the sealing valve is designed as a hollow shaft and a solid shaft in the form of unilateral coaxial transmission. The structure is complex, the processing is difficult, and the equipment maintenance is difficult.

At the same time, the driving arm of the valve plate is a cantilever beam structure. When the sealing valve is working, the driving arm bears a large load, which is easy to cause deformation or even breakage of the driving arm, which brings serious safety hazards to the equipment.

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