Scouring-resistant double-core ceramic regulating valve

Abstract

The invention discloses a scouring-resistant double-core ceramic regulating valve, which relates to the technical field of valves, and comprises a pair of left and right ceramic valve cores which are hermetically mounted in a cavity of a valve body, are symmetrically arranged along the center line of the valve body, and comprise a main valve core positioned at the bottom of an upper platform and an auxiliary valve core positioned on the other side, wherein opposite sides of the main valve core and the auxiliary valve core are respectively provided with flow channel grooves which can be combined oppositely, and the main valve core is rotatably connected with the auxiliary valve core through a transmission mechanism; a valve rod which comprises a first end connected with an executing mechanism and a second end which penetrates through the cavity of the upper platform and is detachably connected with the top of the main valve element. The ceramic regulating valve is not prone to being clamped and blocked in the using process, high in safety, long in service life and free of bias flow, the flow area of a flow channel formed by the two flow channel grooves is changed through relative rotation of the two ceramic valve elements, throttling, opening and closing of fluid are achieved, a flow channel formed by the two flow channel grooves is located in the middle of the valve all the time, and bias flow cannot be caused.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a scour-resistant double-core ceramic regulating valve. Background technique [0002] In coal chemical industry, silicon chemical industry, mining metallurgy, electric power environmental protection and other industries, there are a large number of gas-solid, liquid-solid, gas-liquid-solid three-phase fluid transportation and control systems, especially in the case of hard particle media, most of which are hard Sealed ball valves, butterfly valves, slide valves, gate valves, flapper valves and other valves more or less have the problems of short service life and difficult maintenance, especially if the medium is viscous, easy to agglomerate, easy to scale, easy to crystallize or In the case of large particles, not only the erosion is serious, but also various valves are often blocked and stuck. [0003] Taking the hard-sealed ball valve most used under these working conditions as...

AI Technical Summary

Problems solved by technology

[0002] In coal chemical industry, silicon chemical industry, mining metallurgy, electric power environmental protection and other industries, there are a large number of gas-solid, liquid-solid, gas-liquid-solid three-phase fluid transportation and control systems, especially in the case of hard particle media, most of which are hard Sealed ball valves, butterfly valves, slide valves, gate valves, flapper valves and other valves more or less have the problems of short service life and difficult maintenance, especially if the medium is viscous, easy to agglomerate, easy to scale, easy to crystallize or In the case of large particles, not only the erosion is serious, but also often cause various valves to be blocked and stuck

[0003] Taking the hard-sealed ball valve most used under these working conditions as an example, our analysis is as follows: 1. During the opening and closing process of the ball valve, the medium easily enters the valve cavity and accumulates in the valve cavity. When the medium temperature drops, some The medium solidifies and locks the opening and closing parts, so it is easy to cause serious consequences such as valve jamming

2. When the high-hardness granular medium flows in the pipeline at high speed, it will produce bias flow and eddy current, which will easily lead to damage to the sealing surface of the valve seat or the peeling off of the spray coating on the surface of the ball, which will affect the sealing effect of the valve. In severe cases, it will cause the valve seal to fail. It will also cause erosion of the valve housing and downstream pipelines, resulting in reduced service life of the valve, and the pipeline needs to be replaced frequently

[0004] After the slide valve has been in operation for a period of time, the valve is jammed because the cavity is filled with materials; the wear between the slide plate and the splint is serious, and in the above system, due to the physical and chemical characteristics of the fluid, some valves often have valve trim or The flow channel behind the valve seat is severely damaged by erosion and cavitation, which in turn causes the failure of the valve and even the entire delivery system to operate normally

[0005] Butterfly valves, gate valves, flapper valves, etc., not only have poor sealing performance, but also because of the serious bias flow of the medium fluid, it is very easy to wash the flow channel

Images