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The meeting was presided over by the Ministry of Science and Technology Promotion Center. The former General Manager of the Ministry of Water Resources, Fang Xuetian, and the Secretary of the Construction Mechanization Committee of China Hydropower Engineering Society, Mr. Shuguang Guang, and other seven experts and representatives of the project undertakers, representatives of the user units and representatives of the news media attended the meeting. meeting.
On the basis of the "seventh five-year" and "nine-five-year" major technical equipment research, the United Nations has successfully developed the HL420-2S6000L super large pre-cooling forced concrete mixing by many units in the United Nations, integrating the design and manufacturing experience of the hydropower system for many years. floor. The mixing building can continuously produce normal, rolling and pre-cooled concrete in a large amount, with high automation, safe and environmentally friendly working environment, and stable and reliable operation. The device has remote online fault diagnosis function, and adopts dual-machine dual-control hot-backup three-screen display technology to improve reliability and high quality assurance rate of produced concrete. Compared with imported similar machines, the cost per machine is greatly reduced. Product appraisal evaluation: The main technical performance and overall level of the equipment have reached the international advanced level of similar products.
The special results provided three concrete mixing buildings for the Longtan Hydropower Station in Guangxi, among which 1# and 3# were rated as “Red Flag Equipment†in 2004 in Longtan Hydropower Construction. After it was put into production in March 2004, it has been operating for 7,000 hours. The maximum concrete production capacity of a single building is 348 cubic meters per hour and 110,000 cubic meters per month. Economic and social benefits are outstanding.
Background material:
The national major technical equipment development plan is part of the national key scientific and technological research plan. It belongs to the five-year plan and is managed by the former State Economic and Trade Commission. After the institutional reform, the planned management functions are integrated into the National Development and Reform Commission. The national targets of the plan are clear, the main research and development has a major impact on the national economy and the people's livelihood, and it is necessary to organize cross-sectoral and cross-industry research. It belongs to the domestic “first and first set†large-scale complete sets of equipment to enhance the level of technical equipment in related fields in China. The design and manufacturing technology of independent intellectual property rights fills the domestic gap and replaces imports.
During the "10th Five-Year Plan" period, the Ministry of Water Resources presided over the "South-to-North Water Transfer Project Complete Equipment Development" project (5 projects, 19 topics), with a total project funding of 294.4 million yuan. The project is managed by the Department of International Cooperation and Science and Technology, and the Science and Technology Promotion Center is entrusted with the implementation of specific work.
During the "Ninth Five-Year Plan" period, the development of major water conservancy technical equipment - extra large (360m3 / h) pre-cooled concrete mixing building won the bid in the bidding for the construction of the Three Gorges Phase II project, becoming the main mixing building for concrete preparation (9 large-scale mixing building in the Three Gorges site) Six of them are made in China), and 73% of concrete mixing production tasks were completed. It is hailed as “competitive gas building†and “domestic large-scale equipment that is called the Three Gorges Project Siteâ€, and won the “Outstanding Achievement Award for Key Science and Technology Research Project†jointly issued by the four ministries.
Zhengzhou pre-cooling forced concrete mixing building developed and passed the acceptance
On December 27, 2005, Zhengzhou Hydraulic Concrete Machinery Co., Ltd. undertook the “Tenth Five-Year†National Major Technical Equipment Development Plan “Development of HL420-2S6000L Super Large Pre-cooling Forced Concrete Mixing Building†in Longtan Hydropower Station, Tianzhu County, Guangxi The site passed the acceptance inspection organized by the International Cooperation and Science and Technology Department of the Ministry of Water Resources.