Hydraulic control butterfly valve sealing device

Abstract

The hydraulic control butterfly valve sealing device comprises a sealing end cover and a shaft sleeve which are both of an annular structure, the shaft sleeve is installed on the inner side of the sealing end cover in a clearance mode, a plurality of glue injection holes are formed in the circumferential side wall of the sealing end cover in the radial direction in a penetrating mode, and glue injection connectors are installed in the glue injection holes. Glue inlet holes are formed in the positions, corresponding to the glue injection holes, of the circumferential side wall of the shaft sleeve in a penetrating mode, O-shaped sealing rings are installed on the inner cavity wall of the shaft sleeve in an embedded mode, the novel structure is not prone to abrasion, and even if the shaft sleeve is abraded, high leakproofness can be achieved only by injecting glue into the shaft sleeve through the glue injection holes to fill gaps generated due to abrasion. The maintenance cost is greatly reduced, stable and efficient operation of a circulating water system of a power plant is guaranteed, and the hydraulic control butterfly valve sealing device can be popularized to various hydraulic control butterfly valve sealing devices.

Description

technical field [0001] The invention relates to the technical field of hydraulically controlled butterfly valve sealing, in particular to a hydraulically controlled butterfly valve sealing device. Background technique [0002] Hydraulic control disc valves are widely used in circulating cooling water pipelines of thermal power and nuclear power plants. [0003] At present, the outlet valve of the circulating water pump adopts a horizontal flap type hydraulic control butterfly valve that is controlled to open by the hydraulic oil station and the piston rod. When it is closed, it is closed by the swing arm weight after pressure relief. The sealing type of the hydraulic control butterfly valve shaft and the circulating water end cover is a YX type sealing ring. Long-term operation of the YX type sealing ring is easy to harden and wear, and it will cause wear on the sealing surface of the shaft journal and cause the circulating water to leak. [0004] Based on this, the present...

AI Technical Summary

Problems solved by technology

The sealing type of the valve shaft and the circulating water end cover of the hydraulic control butterfly valve is a YX-type sealing ring seal. The YX-type sealing ring is easy to harden and wear after long-term operation, which will cause wear on the sealing surface of the journal and cause circulating water leakage.

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