18 inch blasting valve product
Blasting valve
2025-03-15
The key component of the blasting valve (cartridge drive device) independently developed by the company meets the high reliability operation requirements under harsh environmental conditions such as high temperature, high humidity, and high radiation in nuclear power. The blasting valve can trigger the blasting device through electrical signals in the event of a serious accident in a nuclear power plant, open the valve within 0.1 seconds, inject cooling water into the core, and prevent core meltdown. It can be called the 'last line of defense' for nuclear safety. The CAP1400 blasting valve key component (cartridge drive device) independently developed by Dalian Dagao Valve Co., Ltd. meets the high reliability operation requirements under harsh environmental conditions such as high temperature, high humidity, and high radiation in nuclear power; The parameters developed are the world's first set, with independent intellectual property rights and technology, reaching the international leading level; In 2023, it will be recognized as the first major technological equipment in the energy field in the third batch of the country.
Technical Parameters
Product Details
Scope of application: The blasting valve is a key equipment for performing safety functions in passive nuclear power plants. After receiving the ignition command signal, it detonates to produce high-pressure gas, breaks the tension bolt, and then drives the piston to accelerate and fully open the valve. The entire process ensures the integrity of the pressure boundary. Blast valves are used in the fourth stage automatic depressurization subsystem of the Automatic Pressure Reduction System (ADS), the low-pressure safety injection pipeline of the Passive Core Cooling System (PXS), and the containment recirculation pipeline, which can effectively alleviate and prevent design basis accidents and serious accidents. Application of achievements: Dalian Dagao Valve Co., Ltd. signed the purchase contracts for the blasting valves of Unit 1 of the National Nuclear Power pressurized water reactor demonstration project and Units 3 and 4 of the Haiyang Nuclear Power Plant Phase II project with China National Nuclear Engineering Co., Ltd. in Beijing in 2013; In 2023, signed a procurement contract for the blasting valves of Units 5 and 6 of the Shandong Haiyang Nuclear Power Project with Shanghai Nuclear Engineering Research and Design Institute Co., Ltd. In September 2021, 12 sets of blasting valve equipment for Unit 1 of the National Nuclear pressurized water reactor demonstration project were delivered, achieving the first major technical equipment demonstration application of domestically produced blasting valves. Intellectual property situation:
Through the development of blasting valves, five patents have been obtained, including one invention patent (for the heat treatment process of the shear cap of a nuclear first level blasting valve), three utility model patents (for a sealing structure of a blasting valve used in a nuclear power plant, a pyrotechnic blasting valve, and a blasting valve used in a nuclear power plant with a bidirectional sealing structure), and one design patent (for a forged steel valve body of a blasting valve).