A long time in the mechanical and chemical industries for several decades, access to a large number of pipe valves and control valves in chemical industry, petrochemical, pharmaceutical, dyestuff, shipping, power generation, natural gas, gas, metallurgy and other industries the production of extremely important and key positions, in the continuous production of non-defective and 'run the risk, dripping, and drain' phenomenon.
At present, the domestic till the world's valve, the main general there are several: plug valves, diaphragm valves, cut back valve, globe valve, gate valve, ball valve, CDs, valve, check valve, safety valve, blind flange valve, reducing pressure valve and so on. The production of valves from our situation, most of the commonly used valve technology level is not high, the structure is relatively simple, most of the seventies and eighties of the last century at the international level, reaching the level of nineties of the last century, less than third. Within the valve leakage, leakage phenomenon has not been fundamentally resolved, and some product reliability is poor, life is short, can not be installed in a complete overhaul to ensure reliable operation during the period, but was forced to stop for repair or replacement. Therefore, the quality of the valve pros and cons of a direct impact on production, energy consumption, environmental protection.
Abroad valves, from the appearance, quality, material, sealing it seems better than the domestic, advanced, but there are always things fatigue and damage, leakage of the time. The valve itself subject to wear and tear gas and liquid delivery impact of leakage point of failure is inevitable. So far, at home and abroad has not yet allowed to bring pressure maintenance valve in the event of failure, will be forced to shut down for maintenance, and its loss could be more than ten million to several million dollars from the calculation. Or can only pass or by-line to make up for this shortcoming, greatly increasing the cost and duplication of the tedious work. But to break through to 'repair the valve under pressure,' is more concerned about problems at home and abroad.
In order to solve this problem, in accordance with long-standing experience, as well as to live according to my invention of the 'gas and liquid pipelines under pressure plugging', 'seat-belt pressure over gas and liquid pipeline installations' and 'quick special pipe joints' in experience in excavation, in accordance with the former minister of Ministry of Chemical Industry Gu received my requests made by the 'wish to solve the problem valve leakage', for this theme, I gained work experience under long-term efforts to resolve the reform and innovation.
In order to solve the production process can be shut down for maintenance with the valve is not depressed, it will be our predecessors had never done before, it involves very difficult limitations. First, the original standard valve size range can not be changed; Second, the structure should be reasonable, can not be superfluous; three to safe and reliable; 4 is a maintenance operation should be simple and convenient; five long life than the original; 6 is a cost savings. First, I would plug valves as innovation in the reform of a breakthrough in research.
After careful consideration, the inspiration for gradual reform and innovation produce plug valves. Around the right plug valves of the hard and soft, wear, sealing performance, breach, in the case under pressure to replace the valve core of the structure of double-cutting technology for development. The invention from conception to test hundreds of thousands of times, and finally complete success. The original liquid delivery systems require a total of valves, when the pipeline system in the total valve failure to close. Are generally used for more than the total valve to valve, because the total does not always shut down and open the valve, therefore easier to rust corrosion, over time it is easy to leak. Once the total valve leak can not be closed, not only to the maintenance of pipeline system to bring trouble, if the maintenance of the total valve must be closed on a total valve, so that will affect the entire system to stop using. After the reform of this invention and innovation 'can bring pressure maintenance of the plug valves' replace the existing large-scale use of the general caliber of the gate valve, ball valve, widely used chemical, petrochemical, natural gas, residential, storage tankers, fuel tankers, storage ducts, as well as all walks of life. The patented invention has been selected by the U.S. primaries, and through ministry-level appraisal has been included in the standard edition of the Ministry of Ministry of Chemical Industry. Then plug valves of the second generation of the third generation have improved so that the life of the valve increased significantly, can not compare with similar products, can replace ball valves, import plug valves.
Because of this invention, on the reform and innovation 'Pressure Detection Diaphragm Valves' opened a breakthrough, because often the characteristics of diaphragm valves, valve core package composed of rubber, but rubber material as the medium Mochuan stars diaphragm and rubber exposed to strong corrosion cause premature aging, diaphragm of the valve core frequently replaced. I have to sort out a replacement diaphragm valves cut off the inlet pressure valve core of innovation, namely, after the reform 'can bring pressure maintenance of the single-cut diaphragm valves'. Also solve the innovative invention of cut-off valve. The characteristics of the original cut-off valves, due to high temperature flange seal leakage and spool loss or partial damage to the valve seat, and the original cut-off valve is the high and low pressure gas and liquid transport regulator, flow size, easy to gas, liquid washed out worn spool , and the valve seat, and the use of frequent, resulting in cut-off valve closure failure, internal leakage, can not be normal production. Valve can only stop in the important area for valve repair. For example, a chemical plant in Tianjin in previous years, due to a damaged valve or two valves, with pressure maintenance can not only halt the production of maintenance, resulting in direct losses of more than 400 million, no doubt to the industry and civilian losses caused by pipeline facilities can not be measured with money. Examples like this abound. Valve is to control the industry and the lifeblood of modern life supporting products, but the objects, fatigue and damage is inevitable. For example, the first generation of aircraft, there is only one engine, once broken down, the consequences are unthinkable. As the attached lines to increase the valve, an increase of leakage points (a leak valve with five points), but also to increase the design costs, consumption of industrial and material consumption. The existing post-reform 'can bring pressure maintenance valve' that is, (one two valves) can reduce the leakage of five points, saved a steel valve. For example, a cut-off valves or diaphragm valves DN50 innovative each year after the single-cut diaphragm valves or cut-off valve, will be able to save tens of kilograms of steel, which can bring pressure maintenance, but also reduced the leakage points and five provincial industrial material saving, reduce capital investment. Maintenance can be a single cut with a pressure cut-off valves and diaphragm valves pilot was successful, and can be long, medium and short-three series to use. With such a valve can ensure the long-term operation in industrial production, as well as insurance for regular maintenance, reliability and security. The patented invention has also been the U.S. primaries to select R-R's.
In the 'can bring pressure maintenance of the single-cut cut-off valves and diaphragm valves' basis, but also to connect breakthrough 'can bring pressure maintenance of the double-cut-style diaphragm valves and the cut-off valve' innovation. Why should 'double-cut' do? Because it is due to the need for working on the production pipeline and cut off the import or export of the production work when needed may be cut than the single-mode for even application. ball valve Trunnion Mounted Ball Valve Floating Ball Valve Top Entry Ball Valve ball valve V Type Ball Valve
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