Therefore, a manual pressurization mechanism is set in the pneumatic hydraulic drive system of the hydraulic pneumatic ball valve. This manual mechanism works reliably and has a certain working efficiency, and the physical consumption of the staff when opening and closing the valve is also very small. It is used to control the pneumatic ball valve installed in the main gas pipeline. The nominal diameter of pneumatic ball valve is 500mm, and the nominal pressure is 8MPa. The two pressure vessels control the opening and closing of valves. The container is gas-liquid two-phase, the lower half is filled with oil, and the upper half is filled with air from the compressor. By changing the air pressure, the pneumatic ball valve can be operated in a short distance or controlled in a long distance. Under the action of compressed air, the oil in the container flows into the half cavity of the hydraulic cylinder through the middle of the oil filter, one-way throttle valve and manual reversing valve. The piston in the hydraulic cylinder is pushed by the pressure oil, and the piston drives the rocker to rotate the ball of the pneumatic ball valve. At the same time, the oil in the other half of the hydraulic cylinder flows into another pressure vessel, and the air in the vessel is connected with the atmosphere. If the pressure of compressed air cannot overcome the friction force when the ball rotates, or an accident occurs and the source of compressed air is lost, in order to complete the opening and closing of the valve, the manual reversing valve can be operated. The manual supercharging mechanism connected to the manual supercharging mechanism is unidirectional, with low working efficiency and unstable loading.

In 2011, China's exports of pneumatic butterfly valves increased more than expected, the effect of structural adjustment was significant, and innovation ability was improved. Looking at the development trend at home and abroad, China's pneumatic butterfly valve manufacturing industry has a broad space to expand during the "12th Five Year Plan" period. According to the introduction of Tongfeng pneumatic butterfly valve, although China's pneumatic butterfly valve manufacturing industry operated in a complex and tight environment last year, under the influence of the steady and rapid development of the national economy, a series of national macro-control policies, the buying and selling policies of "stabilizing growth, adjusting structure and promoting balance", and the "12th Five Year Plan" for career development, the entire career staff actively tried their best to beat turnover and survive, Although the growth rate has slowed down, the total sales and exports of pneumatic butterfly valves throughout the year reached 124 billion yuan and 3.005 billion dollars, both hitting a new historical high, and the effect of technological progress and structural adjustment was remarkable, completing the outstanding scene of the "12th Five Year Plan".
With the wonderful prospect, Tongfeng pneumatic butterfly valve also reminds domestic pneumatic butterfly valve companies that there are many questions in the current pneumatic butterfly valve industry in China. As the standardized operation of pneumatic butterfly valves in China started late, the production, sale, promotion and application of pneumatic butterfly valve specifications also lagged behind. The accompanying questions about the lack of standardized pneumatic butterfly valve specifications, untimely supply, and poor matching have also hindered the development of domestic pneumatic butterfly valves for a long time, As a result of the above reasons, the application coverage rate of pneumatic butterfly valve specifications is lower than that in prosperous countries. Although it has improved in recent years, there is still a big gap between Japan, the United States, Germany and other prosperous countries.
In recent years, due to the involvement of foreign companies, with the acceleration of the global processing center of gravity moving to China, the share of pneumatic butterfly valve application coverage rate in China has made great progress. At present, the share is roughly 40% to 45%. Although there is still a big gap compared with the international coverage rate of more than 70%, there has been great progress compared with the previous. The coverage area of pneumatic butterfly valve specifications is mainly the Pearl River Delta, especially the application coverage rate of pneumatic butterfly valve specifications of Guangdong Pneumatic Butterfly Valve Company is far higher than that of pneumatic butterfly valve companies in other regions. According to the analysis of Tongfeng pneumatic butterfly valve industry, during the "12th Five Year Plan" period, China's pneumatic butterfly valve industry market has enormous potential, and will also have a good opportunity to absorb foreign advanced technology and capital. Only domestic pneumatic butterfly valve companies can fully apply the key to the rapid rise of China's pneumatic butterfly valve industry, through the provision of relevant services to separate capital, and the attempt to complement each other, can work hard, Accelerate the transformation of commodity and company structure, and increase the research and development of high-end pneumatic butterfly valve materials and techniques. China will further stabilize its position as the "international pneumatic butterfly valve power" and strengthen its competitiveness, so that the pneumatic butterfly valve industry will go out of the current unfortunate situation and change its position from "a large pneumatic butterfly valve country" to "a powerful pneumatic butterfly valve country". In the next ten years, it is not our wish to start to become an international pneumatic butterfly valve base.
International market leading ability.
2、 The scope of the company is small and the number is large, the company structure is unreasonable, the commodity structure is unreasonable, and the leading effect and exemplary leading effect of the company are not fully played. This appearance will not be changed and will not be sustainable in the future. 3、 The commodity structure needs to be adjusted urgently. The technical content, processing technology and commodity price of stainless steel hose are not high, so we should enrich the commodity line and produce high value-added stainless steel hose products.
Regarding these questions, Tongfeng pneumatic butterfly valve proposed the following priorities in 2012:
1、 Take commercial quality as the center, and strengthen the technical transformation. Good commercial quality is necessary to rely on preemptive equipment, which is a necessary condition to ensure commercial quality; 2、 Brand building. Actively promote the popularity of the company and its profession, and make a contrast for the construction of our brand and approach, in an attempt to improve our own popularity; 3、 Technological innovation. Adjust the commodity structure, improve the technical content, processing technology and commodity price of stainless steel hose, enrich the commodity line, and produce high value-added stainless steel hose products.
Pneumatic butterfly valve continues to carry out business based on five basic operations