Professor Chen Jianxin from Changzhou Mechanical and Electrical Vocational College visited
Safety valve manufacturing industry presents good development prospects
With the development of various industries, the variety and specifications of safety valves are also increasing, and there are more and more industries applying safety valves, such as petrochemical industry, oil refining industry, nuclear power industry, thermal power industry, etc. are widely used. With the development of various industries, the variety and specifications of safety valves are also increasing, and there are more and more industries applying safety valves, such as petrochemical industry, oil refining industry, nuclear power industry, thermal power industry, etc. are widely used.
Analysts pointed out that the market size of the safety valve industry in 2013 has expanded significantly compared with last year. In terms of demand, the safety valve demand market is 20 percentage points higher than last year. However, China's safety valve industry has low production concentration, low-end valve R & D capabilities for high-end products, and low manufacturing technology levels in the valve industry.
The importance of valve maintenance and repair
At that time, most domestic industries traded new ones for old ones. At that time, the replaced valves were discarded or sold as waste products. Especially in the industry where flanged valves are commonly used. I want to repair the replaced high pressure, high temperature and large valves, but I don't know how to repair them.
Most of them are still in the manual repair stage. It can be said that in China's valve repair industry, the waste and the available benefits are huge. A power station (4x5omw ~ 4x2oomw) needs to repair tens of thousands of steam turbine valves and bypass valves every year.
The power plant has only one grinding machine imported from Germany in 1992, and the others are manually operated. Not only is the efficiency inefficient, but also the accuracy does not meet the requirements. The bypass high-pressure relief valve leaked, but the power plant could not repair it. The effect of sending to Shanghai for repair is not satisfactory.
In recent years, as various units have gradually started independent economic accounting to reduce costs, from management personnel to front-line maintenance workers have gradually realized the importance of repairing valves, because the money saved in this respect is extremely considerable.
What does the stainless steel elbow include according to engineering needs
The stainless steel elbow is in the pipeline system, and the elbow is a pipe fitting that changes the direction of the pipeline. According to the angle, there are three kinds of the most commonly used, 45 ° and 90 ° 180 °. In addition, according to engineering needs, it also includes other abnormal angles such as 60 °. The materials of the elbow are cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metal and plastic. The ways to connect with the pipe are: direct welding (the most common way) flange connection, hot melt connection, electric fusion connection, screw connection and socket connection According to the production process, it can be divided into: welding elbows, stamping elbows, hot pressing elbows, push elbows, casting elbows, forged elbows, clip elbows, etc. Other names: 90 ° elbow, right angle bend, love and bend, white steel elbow, etc.