Gate valve high in sealing performance and operating method thereof

Abstract

The invention discloses a gate valve high in sealing performance. The gate valve high in sealing performance comprises a valve body, a valve seat, a valve rod, a gasket, a valve deck, a pressing sleeve, a pressing plate, a locking nut and a hand wheel, wherein a valve nut is arranged below the hand wheel, a pressing nut is installed outside the valve nut, an oil nozzle is arranged outside the pressing nut, packing is arranged in the pressing sleeve and is divided into an upper section and a lower section by a partition ring, a sealing base is arranged at the position where the lower end of the pressing sleeve is connected with the valve deck, a rivet is arranged outside a flange at the upper end of the valve body, a flashboard is arranged below the valve rod in the valve body, and the flashboard and the valve seat are fixed together through welding. The invention further discloses an operating method of the gate valve high in sealing performance. According to the gate valve high in sealing performance and the operating method of the gate valve high in sealing performance, a medium channel in the valve body is straight through, a medium flows linearly, flowing resistance is low, the moving direction of the flashboard is perpendicular to the flowing direction of the medium all the time, a water hammer is unlikely to appear, the structure is simple, sealing is reliable, operation is easy and flexible, and the application range is wide.

Description

technical field [0001] The invention belongs to the technical field of valve manufacturing, and relates to a high-tightness gate valve and an operating method thereof. Background technique [0002] The valve is a control component in the pipeline fluid delivery system. It is used to change the passage section and the flow direction of the medium, and has the functions of diversion, cut-off, throttling, check, diversion or overflow relief. In terms of technical support for valve production and R&D, domestic valves are not lagging behind foreign valves. On the contrary, many products are already comparable to international companies in technology and innovation. The development of the domestic valve industry is moving in the direction of high-end modernization. [0003] With the continuous development of valve technology and the continuous expansion of valve application fields, the corresponding valve standards are becoming more and more indispensable; valve industry products ...

AI Technical Summary

Problems solved by technology

[0004] Among them, the opening and closing part of the gate valve is the gate plate, and the movement direction of the gate plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed. For a long time, common gate valves used in the market have generally suffered from water leakage or rust. It is easy to cause erosion and abrasion between the sealing surfaces, it is difficult to maintain, the external dimension is large, a certain space is required for opening and closing, the opening and closing time is long, and the structure is relatively complicated

Images