Wet chlorine special valve

Abstract

A wet chlorine special valve includes a valve body, and the valve body is provided with a valve cover and an inner valve rod. The inner valve rod is provided with a corrugated pipe, stuffing and a valve clack, and a pressure plate is located on the stuffing, and the pressure plate is fixedly connected to the valve cover through a nut and a hexagon bolt. The inner wall of the valve body, the inner valve rod, the valve clack and the stuffing are made from fluorine F46, and the corrugated pipe is made from the material of F46. The top end of the corrugated pipe uses wide-body design. The corrugated pipe is provided with embedded reinforcing plates and is placed in a groove on a contact surface between the valve cover and the valve body. The valve body, the valve cover and the corrugated pipe are fixed together by nuts and a stud. The top end of the inner valve rod is connected to an outer valve rod through a connecting block and a connecting screw, and the outer valve rod is provided with a hand wheel. A hand wheel nut is located above the hand wheel, and a valve nut is located below the hand wheel. The valve nut is equipped with a limiting ring and a limiting bolt, and the valve body is also equipped with an opening position indicator.

Description

technical field [0001] The invention relates to the field of industrial valves, in particular to a special valve for wet chlorine. Background technique [0002] Wet chlorine is the most corrosive medium in the chlorine industry. Usually, the valves used in wet chlorine are ordinary chlorine stop valves or ordinary bellows stop valves. The application in wet chlorine pipelines has the following defects: Ordinary The material of the chlorine globe valve (the valve body is usually 316 or 316L, the disc and seat are surfacing + Stellite Stellite) cannot stop the high corrosion of wet chlorine at all, and the valve components will basically be replaced within 30 days. Severe corrosion leads to failure and serious safety hazards. Frequent replacement will bring high costs; in the production and transportation of chlorine gas medium, ordinary chlorine gas valves basically use packing to achieve sealing. During frequent opening and closing , The stem and packing produce two superim...

AI Technical Summary

Problems solved by technology

[0002] Wet chlorine is the most corrosive medium in the chlorine industry. Usually, the valves used in wet chlorine are ordinary chlorine stop valves or ordinary bellows stop valves. The application in wet chlorine pipelines has the following defects: Ordinary The material of the chlorine globe valve (the valve body is usually 316 or 316L, the disc and seat are surfacing + Stellite Stellite) cannot stop the high corrosion of wet chlorine at all, and the valve components will basically be replaced within 30 days. Severe corrosion leads to failure and serious safety hazards. Frequent replacement will bring high costs; in the production and transportation of chlorine gas medium, ordinary chlorine gas valves basically use packing to achieve sealing. During frequent opening and closing , the stem and packing produce two superimposed frictions, radial and axial

The packing is easy to wear and tear. If the packing is not found and replaced in time, the medium in the pipeline is likely to leak out, causing serious accidents; some of the chlorine gas pipelines that have adopted ordinary bellows stop valves have achieved double sealing and improved sealing performance. , but the materials of the core components directly in contact with the medium, especially the bellows are made of metal materials, such as Hastelloy and Monel, which still cannot prevent corrosion. In the highly corrosive wet chlorine pipeline, it is easy to appear In the case of bellows failure, no matter internal leakage or external leakage, the consequences will be very serious, ranging from causing economic losses to the enterprise, to seriously endangering the lives of employees, and may even cause mass incidents