Micro-dynamic ash-discharging ball valve

Abstract

The invention discloses a micro-dynamic ash-discharging ball valve belonging to the technical field of valves and aims to provide an ash-discharging ball valve with small opening torque, smooth ash-discharging process, good ash-cleaning effect on the surface of the ball valve and reliable seal. The technical scheme of the invention is as follows: the micro-dynamic ash-discharging ball valve comprises a valve body, a valve rod, a valve seat and a valve cover, and the ball body of the ball valve is a hemisphere; the micro-dynamic ash-discharging ball valve further comprises a hemisphere bracketand a metal bloated bag; the hemisphere bracket is fixedly connected with the valve rod; the bottom surface of the bloated bag is installed on the hemisphere bracket; the bottom surface of the hemisphere is connected with the top surface of the bloated bag to form a closed hollow cavity; the cavity of the bloated bag is communicated with a compressed air pipeline; and a double-sided stainless steel sealing ring is fixed on the valve seat and contacted with the surface of the hemisphere. According to the invention, the structure for fulfilling a seal depending on a constant pressure between the sealing ring and the ball body of the traditional ball valve is changed, and a drive torque in opening and closing processes is greatly reduced; a hard seal with an ash-scraping function has the advantages of excellent resistance to abrasion, temperature resistance and environmental protection adaptability; and multiple effects of labor-saving in transmission, smooth ash-discharging process, natural ash-cleaning effect, reliable seal, and the like are fulfilled.

Description

technical field [0001] The invention relates to an ash unloading ball valve, which belongs to the technical field of valves. Background technique [0002] The ash unloading ball valve is a valve widely used in metallurgy, building materials, petroleum, chemical and other industries. It is an indispensable and irreplaceable product in current industrial production. The main function of the ash unloading ball valve is to complete the frequent discharge of gas, liquid and dusty media in the pipeline. The requirements for the ash unloading ball valve are: smooth and non-blocking during ash unloading, reliable airtightness after the discharge is completed, stable function, can withstand harsh environments such as high temperature, bonding, corrosion and erosion, and have corrosion-resistant, wear-resistant, high-temperature-resistant seals reliable performance. [0003] At present, the ash unloading ball valve used in most factories in the metallurgical industry is a soft s...

AI Technical Summary

Problems solved by technology

[0004] 1. The excreted solid powder becomes more and more viscous;

[0005] 2. The solid powder produced by imported mineral materials is damaged by seawater salt and contains more and more harmful ions;

[0006] 3. The excreted dust contains moisture, which will adhere to the equipment during the ash unloading process. The accumulated dirt will form a hard bond on the surface of the stainless steel ball, and the irregular dirt will bond to the soft rubber sealing ring during the valve switch process. Cause damage, so that the ash discharge valve is scrapped due to leakage;

[0007] 4. During the opening and closing process of the ash unloading ball valve, due to the high pressure in the pipeline, the high sealing specific pressure, and the relatively large opening torque, this strong friction not only brings difficulties to the manufacture, but also seriously damages the spherical surface and the sealing seat. An important problem that is difficult to solve for this kind of ball valve at present

[0008] In this case, the service life of the ash unloading ball valve has been seriously affected. At present, a new ash unloading ball valve with a nominal pressure of 0.4MPa rarely has a service life of more than 2 months, and some are even caused by adhesion. Premature failure due to seal failure

In order to completely solve the problems faced by the ash unloading ball valve, such as the viscosity of the material becomes larger, the material has many harmful components, the spherical surface is bonded and damaged, the rubber sealing ring is leaked and scrapped, and the opening torque is large and the spherical surface and the sealing seat are easily damaged. It is very necessary to improve the structure of the gray ball valve, and it is also an urgent task for technicians

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