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02-15

2020

Changzhou Nuclear Power Equipment Manufacturing Association "2016 Annual General Meeting and 'Hualong No. 1'

On April 28, 2016, Changzhou Nuclear Power Equipment Manufacturing Association's "2016 Annual General Assembly and 'Hualong No. 1' Technology and Development High-level Forum" meeting was successfully held in Changzhou Administrative Center. Bayi Cable was the main co-organizer and sent a total of Twenty representatives attended the meeting. The meeting summarized the work of the association in 2015, and proposed the work plan of the association in 2016, and deployed the work for the next year. The meeting was fortunate to invite Huang Weifeng, a researcher-level senior engineer of China Nuclear Power Engineering Co., Ltd., and the chief designer of Hualong No. 1 Fuqing 5/6 and K2 / K3 projects, to make a theme report entitled "Hualong No. 1 General Introduction". The report is divided into seven parts: research and development history, overall technical scheme, key equipment localization, main research and development verification work, independent intellectual property rights, project advancement and summary. It reports the development history, technology and equipment requirements of "Hualong One" After thorough elaboration and in-depth analysis, Changzhou nuclear power equipment enterprises benefited a lot and gained a more systematic understanding of the "Hualong One" with independent intellectual property rights. As the president unit of Changzhou Nuclear Power Equipment Manufacturing Association, our company will seize the opportunity of nuclear power development, inherit the nuclear safety concept of "rationality, coordination, and advance" of China nuclear power, and actively promote and promote the nuclear safety culture within the enterprise. Implement nuclear safety culture requirements into every job, and strive to successfully complete the K3 measurement cable contract for Fuqing Units 5 and 6. At the same time, the company will accumulate experience, lay a solid foundation for the successful bidding of the next "Hualong No. 1" project, and contribute to the establishment of the national third-generation nuclear power brand.

02-15

2020

Carbon fiber composite core wire helps China's ultra-high voltage power transmission and transformation go global

Carbon fiber composite core wire is another model of contemporary technological development. It is a new type of wire developed using the high strength and corrosion resistance of carbon fiber. Compared with the conventional steel core aluminum stranded wire, it has a series of advantages such as light weight, high tensile strength, high temperature resistance, corrosion resistance, large current carrying capacity, and low line loss. The carbon fiber composite core wire has a higher transport capacity, and its current carrying capacity can reach twice that of conventional wires under the same weight. Carbon fiber composite core conductors use soft aluminum with less wire loss instead of hard aluminum for twisting. There are no magnetic losses and thermal effects caused by steel wire materials, which can greatly reduce power transmission losses. The heat resistance of this product is much higher than that of steel core wire, and it can run at 160 degrees high temperature to meet the needs of peak power consumption. Compared with carbon fiber composite core wire and steel core aluminum stranded wire of the same weight, the aluminum cross section can be increased by 10-35%. No need to rebuild the tower to re-establish new lines to increase capacity. The tensile strength of general steel wires is 1240 MPa, while the strength of carbon fiber composite cores can reach more than 2400 MPa, and the strength safety factor of carbon fiber composite core wires is nearly doubled. Carbon fiber composite core wire has a small coefficient of linear expansion, eliminates line sag, is not affected by long-term creep of aluminum, and avoids thermal expansion sag of traditional steel core cables. It can reduce the height of pole towers, increase the distance between poles and towers, and reduce more than 16% of towers and poles, thereby reducing transmission line corridors, saving land resources and reducing the overall construction cost of transmission lines. This makes it not only have a strong comprehensive benefit advantage in the reconstruction of the old line; even in the construction of the new line, it also has a competitive advantage. (North Star Smart Grid Online)

02-15

2020

China's third-generation nuclear power technology goes to sea to warm up

Through the joint research of domestic and foreign equipment manufacturing enterprises, China's third-generation nuclear power AP1000 (passive pressurized water reactor nuclear power technology) equipment domestically has made significant progress. National Nuclear Power Technology Corporation previously announced in Beijing that a three-generation nuclear power equipment supply chain has been formed, of which large forgings have been fully produced by domestic heavy industry enterprises. Unlike the second-generation nuclear power, which has a design life of about 40 years, AP1000, as the third-generation nuclear power technology, fully adopts ASME standards and has a design life of 60 years. As equipment accounts for about 50% of the project cost, it also needs to go through a 60-year life test during operation. Equipment manufacturing and supply are the most critical links in the operation of power stations. For domestic nuclear power equipment enterprises, the development of AP1000 supporting equipment has allowed domestic nuclear power equipment enterprises to conduct a "big training". Unlike foreign companies, domestic equipment manufacturers also undertake the task of equipment localization. In the first unit of AP1000, Sanmen Unit 1, Chinese companies were only responsible for components such as steel containment, main pipelines, and pressure stabilizers. However, the fourth unit was Haiyang Unit 2, including reactor pressure vessels and steam generation. The key equipment such as generators, blast valves, and canned motor main pumps will be manufactured by Chinese companies, and the localization rate of the entire unit will also reach the goal of 70%. In the future, if China 's independent AP1000 technology can go to sea, China 's first pile of construction experience will bring certain competitive advantages to the construction of other AP1000 projects. Since the US AP1000 construction was later than China, the US VOGTLE nuclear power project has already invited six engineering and technical support personnel from the State Nuclear Power Technology Company with experience in the construction of the first reactor of the AP1000 to the United States to provide technical services at the end of last year. In the construction of another third-generation nuclear power EPR project, the Taishan Nuclear Power Plant in Guangdong, although the start time of this project in China was later than in other countries, the overall construction progress has surpassed, and its construction experience has also given China an advantage in bidding for other EPR projects in the future. . Pakistan's Chashma nuclear power plant is China's first commercially available pressurized water reactor nuclear power plant, but South Korea's nuclear power, which started at about the same time as China, has taken the lead in nuclear power exports. In the international nuclear power market, Chinese nuclear power companies are facing fierce competition from other giants. This may include Areva EPR (European Pressurized Water Reactor) technology, General Hitachi ESBWR (Economically Simplified Boiling Water Reactor), APR1400 technology from the Consortium of Korea Hydro and Nuclear Power Plant Corporation, Mitsubishi Heavy Industries 'APWR (Advanced Pressurized Water Reactor) technology and Toshiba The company's ABWR (Advanced Boiling Water Reactor) technology. (Shanghai Nonferrous Network)

02-15

2020

Study on Extrusion Process of Ceramicized Silicone Rubber

The refractory layer uses a new material "ceramic siliconized rubber", which is a new type of polymer composite material. In the case of flame ablation at 750 ℃ ​​× 90min, it will not be burned into powdery ash, which can form a hard ceramic shell, which plays the role of insulation and fire protection. And the higher the temperature, the longer the burning time, and the harder the shell. This material is used as a cable refractory layer and can withstand certain spray and impact effects. And has excellent electrical properties, good mechanical properties and other characteristics, according to the special process performance of materials, we determined to trial production on φ85 silicone rubber extruder. During the trial production process, we found through multiple tests that the tensile strength and elongation at break of its physical and mechanical properties always failed. Therefore, in the trial production, we adjusted its key operations multiple times, and after repeated debugging and testing, we finally succeeded. The fireproof layer extrusion process is as follows: 1. Cold extrusion should be adopted. The temperature of the screw, head and fuselage of the extruder should be lower than 30 ° C, and the highest temperature should not exceed 50 ° C. The lower the cooling water temperature is, the better; Sulfur, clogging the head; 2. The electric heating oven or oven is according to the first stage temperature: 160 ~ 180 ℃, the second stage temperature is 165 ~ 185 ℃, the third stage temperature is 170 ~ 175 ℃, the fourth stage temperature is 175 ~ 180 ℃, and the last stage The temperature is set and heated at 200 ~ 230 ℃, and the vulcanization temperature of each section can be set according to different models of equipment and cables of different structures. The principle is that there are no micropores in the cross section of the product, and there is no air bubble in the longitudinal direction of the wire and cable. First, the temperature of the first and second stages should be lowered by 5 to 10 ° C, and the temperature should be gradually lowered by 5 to 10 ° C until no bubbles are generated; 3. Production speed is a key parameter that directly affects the degree of vulcanization. According to vulcanization curve data, after repeated verification, it is determined that it is about 10m / min. It is necessary to slow down at the beginning of extrusion and then increase the speed slowly. It can guarantee qualified physical and mechanical properties. 4. The cable extruded by extrusion die has good appearance quality, smooth and round surface. According to the properties of the ceramic silicon rubber material, after repeated tests, it was finally decided to use extrusion mold production. The length of the mold section molding section is shorter than ordinary rubber. The length of the molding section is recommended. The length of the molding section of the small cross section is 1.5-3mm. The length of the shaping section is 2-5mm. 5. Mold polishing. In order to improve the appearance quality of the cable extrusion, the ceramic silicon rubber mold must be polished before extrusion. If the extrusion surface is rough and not smooth after polishing, adjust the distance between the extrusion die sleeve and the die core. At the same time, the extruded material should be slightly larger than the diameter of the finished wire, and the die sleeve should be slightly smaller than the ordinary silicone rubber wire and cable. Some, in the end, are subject to actual production site commissioning. (Southern Cable Network)

02-15

2020

Large-section wire display: a technological revolution

Ohm's law, the classical electrician theory, shows that there are two ways to improve the DC transmission capacity: one is to increase the transmission voltage, and the other is to increase the transmission current. The Jinsu Project opened six-splitting 900 square millimeter large cross-section conductors first, positioning the conductor selection of China 's DC transmission technology at a new height, and laying the foundation for China 's DC power transmission to achieve "boost voltage and current". Technical staff of the State Grid Corporation's DC company said that the application of 900 square millimeters of large-section wire needs to overcome technical difficulties in construction and exhibition. "Like the traditional artificial display with tension display in the early 1980s, large-section wire display is also a revolution in wire display technology." With the increase of the conductor cross section, the increase in the number of splits, and the increase in the breaking force of the conductor, the 900 square millimeter large-section conductor has placed higher requirements on the existing conductor deployment technology, equipment, quality, and construction safety and efficiency. "Limited by the manufacturing technology of the equipment itself and the safety of construction, it is not possible to simply increase the rated output of the wire spreading equipment while the cross-section of the wire is increasing. To this end, through hard work and exploration, we formed a The new technology of 3 "," two pulls, 6 "and other large section conductors is laid out, which provides favorable technical support for the application of large section conductors." State Grid Corporation DC company technical staff said. The new technology of "one pull 3" and "two pull 6" wire display is a major breakthrough in wire tension display technology. It effectively solves the problem of using existing equipment to enlarge the cross-section of multi-split conductors, which not only reduces the construction safety risk, but also improves the construction efficiency, quality and safety of multi-split conductors.

02-15

2020

High-speed development of submarine cables, copper industry benefits

In the future, where is the most potential market for the Chinese cable industry? Many industry experts said that submarine cables will rise with high added value and become the new darling of the cable market. At the "Copper Club Symposium" organized by Shanghai Medium-term Futures Brokerage Co., Ltd. on September 21, a representative of Shanghai Shenghua Cable Group stated that due to higher requirements for wear resistance, corrosion resistance and transmission performance, the length of submarine cables The output value is much higher than ordinary cables. Submarine cables are mainly used in two fields, one is offshore oil rigs, and the other is offshore wind energy transmission. The construction of offshore oil rigs will effectively drive the demand for submarine cables. At present, drilling platforms can be divided into two types according to the movement mode: jack-up and semi-submersible platforms. The former requires about 150 kilometers of submarine cables and the latter requires about 180 kilometers. In addition, each platform can be divided into drilling platform, production platform and living platform according to their functions. The demand for submarine cables is about 200 kilometers, 200 kilometers and 100 kilometers respectively. At present, there are approximately 10,000 kilometers of submarine cable gaps in new domestic and offshore platforms. The development of new energy is one of the key points of the industry's "12th Five-Year Plan". Wind energy, especially offshore wind energy, has great potential. China has a long coastline and numerous islands, which can provide more wind farms than inland. However, the power generated by the wind power can be transmitted to the local power grid for unified deployment, which requires high transmission performance of submarine cables. According to Zhang Zhonghua, Secretary-General of the Shanghai Wire and Cable Association, currently only domestic submarine cables of 35,000 kV and below can be produced, and the production technology of 110,000 kV submarine cables is almost entirely controlled by foreign countries. If China is to develop low-cost and efficient offshore wind energy, it must increase research investment in new products. In addition, the military market is also favored by cable companies. Although the domestic shipbuilding industry is currently experiencing a cold winter, some heavy industry companies still have considerable orders for ships from fishery administrations and sea surveillance. In the future, China's peaceful development of the ocean will have more demand for official ships. This is undoubtedly a good thing for large cable companies with brand advantages and technological advantages.

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