Novel high-medium-low-pressure wear-resisting double-gate-disc ash gate valve

Abstract

The invention relates to a novel high-medium-low-pressure wear-resisting double-gate-disc ash gate valve. The gate valve comprises a valve body, two valve seats, a valve deck, gate discs and a driving mechanism of the gate discs and is characterized in that each valve seat is in the shape of a flange, the two valve seats are connected to the inner ends of flow channels on the two sides of the valve body respectively, an O-shaped sealing ring is arranged between each valve seat and a valve body contact surface, annular grooves corresponding to the valve seat sealing surfaces are formed in the two side faces of each gate disc respectively, hard alloy is arranged in each annular groove through bead welding, an inner annular groove and an outer annular groove are formed in each valve seat sealing surface, hard alloy is arranged in each inner annular groove through bead welding or a ceramic ring is embedded in each inner annular groove, and each outer annular groove is filled with a soft sealing ring. The gate valve is reasonable in structural design, reliable in use, and capable of fundamentally solving the problems of an existing ash gate valve that wearing occurs easily, sealing performance is poor, service life is short, maintenance is not easy, and using cost is high, wearing resistance and sealing performance are improved remarkably, service life is prolonged, and maintenance is facilitated.

Description

Technical field [0001] The invention relates to a special control gate valve used in high, medium and low pressure pipeline transportation projects of mineral slurry in mineral processing plants, coal slurry in power plants and various ash slag slurry, in particular to a new type of high, medium and low pressure wear-resistant double gate ash Slag gate valve. Background technique [0002] The existing ordinary ash gate valves for controlling switches in various ash slurry high, medium and low pressure pipeline transportation projects consist of a valve body 1, a one-way soft sealing valve seat 14 integrated with the valve body 1, and a one-way soft sealing valve seat 14 The mating gate 5, the valve cover fixed on the upper part of the valve body 1, the drive cylinder 13 fixed on the valve cover 2 by the bracket 3 and connected to the gate 5 (see Figure 4-Figure 6 ), the following problems exist in its use: [0003] 1. As a single gate valve, the thickness of the gate is betwee...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a novel high, medium and low pressure wear-resistant double-disc ash gate valve with reasonable structure design and reliable use, which fundamentally solves the problems of easy wear, poor sealing, The problem of short service life, difficult maintenance and high cost of use, significantly enhances wear resistance and sealing performance, prolongs service life and facilitates maintenance

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