Chip, optical fiber and optical cable are the hardware foundation of today’s information-based, intelligent and networked society, and electronic-grade quartz sand with purity of 99.999% is the basic raw material for manufacturing chip, optical fiber and optical cable. For a long time, China’s electronic grade quartz sand has relied on imports. Breaking the "ceiling" of 80% purity of domestic mainstream quartz sand, breaking foreign technical barriers and solving the "stuck neck" problem … Xie Dachun, technical director of Jiangsu Xinyiding Shi Ying Science and Technology Co., Ltd., did not stop, still buried himself in the laboratory all day, holding his sleeves, and continued to seek breakthroughs in quartz sand raw materials whose purity has reached the world’s top level.

"Ingenuity is the determination to break through and the patience to study."

On the afternoon of April 3rd, in the roasting workshop of Jiangsu Xinyiding Shi Ying Science and Technology Co., Ltd. in Shuyang County, Suqian City, a "big guy" connected with a huge water tank was rising with white steam, which was a "unique weapon" for enterprises to purify quartz sand. This reformed equipment led by Xie Dachun won the national invention patent.

In the purification process of quartz sand, many impurities are micron-sized and need to be treated by cold explosion. That is, using the principle of thermal expansion and cold contraction, high-temperature quartz sand is put into cold water to burst, so as to achieve the effect of separating impurities. However, as soon as the high-temperature quartz sand enters the water, the cold water becomes boiling water, and the effect of cold explosion is greatly reduced. Many domestic technical teams are stuck in the "cold explosion" level.

"In those years, I walked repeatedly in my mind to do simulation tests, and finally I had this machine." Xie Dachun said that a few years ago, he happened to pass by a popcorn stand. At that time, the sound of popcorn startled him, but it was this "bang" that reminded him of the solution of "cold explosion" technology from the production principle of popcorn. Then, he immediately rushed back to the company and took his colleagues to discuss. Finally, he invented the current dynamic roasting and cold explosion technology: in a quartz tube with a constant temperature of 930℃, Shi Ying blocks were continuously put in, and during the falling process, they were evenly heated to complete the cold explosion.

In the following years, Xie Dachun and the company constantly improved their equipment in the process of updating their production technology, and only the equipment for producing electronic-grade quartz sand was updated for more than ten times, finally achieving self-sufficiency of electronic-grade quartz sand.

The reporter noticed that there are not many operators in such an important roasting workshop, and a large number of operation links have been replaced by hanging rails and electric cranes. Workers only need to control them remotely. "This is also a bitter credit! In the traditional process, there is a great demand for workers in the roasting workshop, and at the same time, because of the high temperature, workers are easily burned if they are improperly operated, so the turnover rate is very high. " Wang Wei, the production director of the company, told the reporter that at that time, when the company was troubled by this "industry problem", Xie Dachun took the task without saying anything.

In the next three months, Xie Dachun "closed the door" in the workshop and kept researching and experimenting all day. There were more than 500 drawings drawn alone. After repeated experiments for more than 260 times, we finally found such a "machine substitution" method, which solved the production problem satisfactorily and thoroughly. Now this method has been widely used in the whole industry.

"I am a farmer, and I failed in the college entrance examination. Even when I entered the business, I only had some electrician foundation, so as long as I am willing to study, I can always find a solution to the problem." Xie Dachun told reporters that he is a veritable "soil expert". All scientific research achievements and invention patents were explored in workshops and laboratories, and this experience also reflected his understanding of "ingenuity": the determination to break through and the patience to study.

"Social terrorism" experts break the technical blockade

Xie Dachun has a dazzling "report card": in the past 30 years, he has won more than 20 national, provincial and municipal scientific and technological innovation achievement awards and science and technology awards, and has more than 100 invention patents and utility model patents, among which five scientific and technological achievements such as "domestic preparation technology of electronic quartz sand" have filled the domestic gap and reached the international advanced level.

Due to the particularity of the industry, electronic quartz sand is mainly used in high-tech fields such as semiconductors, electrical and electronics, aerospace, national defense and military industry. "For a long time, the purification technology of electronic grade quartz sand has been firmly stuck in foreign countries. Because of technical barriers, the previous domestic quartz sand products can only be used in some low-end products such as halogen lamps, and they can’t touch the threshold of high-end market at all." Director Wang Wei told the reporter that even the leading domestic companies, with the same foreign equipment, have only got the "admission ticket" to the high-end market, and for a long time, 80% of the purity of the domestic mainstream quartz sand products industry has been "ceiling".

Due to the high cost of R&D, many manufacturers have no choice but to give up and import from abroad at a high price of nearly 100 times after entering a "dead end" again and again, but Xie Dachun has been insisting.

"Increase 80% to 99%, and then increase the’ 9′ after the decimal point of 99.9% to three, five or even more, and each step will take three years or more to try and make mistakes." Liang Haidong, Xie Dachun’s apprentice, said that for this goal, Xie Dachun has become the most "social fear" person in the company: in the past 20 years, he has been eating and living in the laboratory, and rarely has any work-related communication with outsiders.

"Striving for Excellence and pursuing the ultimate" is a feature that Xie Dachun once exhorted and taught Liang Haidong more than once, and it is also the best embodiment of Xie Dachun’s "artisan spirit". With the ingenuity of this craftsman, he has endured loneliness for more than 20 years, and has successfully developed a number of high-efficiency, energy-saving and environmentally-friendly mechanical and electrical equipment. More than 20 new products have been widely used in high-tech fields such as semiconductor integrated circuits, aerospace satellite testing, and fiber-optic chip manufacturing for national defense and military industry.

In 2021, Jiangsu Xinyiding Company solved the purification problem of electronic grade quartz sand and became the only enterprise in China that can improve the purity of quartz sand to "six 9s".

Over the years, under his example, more than 300 people have grown into the technical backbone of Shi Ying products manufacturing industry and become a new force to promote technological innovation of enterprises in the industry.

The industrial craftsman "Jin Gangzuan" brought in income of nearly 3 billion yuan.

Replace the old baking oven with a new intelligent baking oven with automatic temperature control, popularize the use of frequency conversion governor for automatic speed regulation, and automatically control the continuous melting furnace with laser controller …

During the interview, Chen Qiong, general manager of Jiangsu Xinyiding Shi Ying Science and Technology Co., Ltd., pointed to the equipment in various production workshops from time to time and proudly told reporters that these were the results of the company’s independent research and development or improvement, most of which were attributed to Xie Dachun.

Ingenuity brings prosperity to all industries. "Every industrial craftsman is a’ Jin Gangzuan’ that will never change in the high-quality development of enterprises!" Chen Qiong sincerely said that thanks to Xie Dachun’s continuous technological innovation for many years, numerous innovations have brought direct or indirect benefits of nearly 3 billion yuan to enterprises, and its social and economic benefits are obvious to all.

In the development layout of enterprises in recent years, Jiangsu Xinyiding Shi Ying Science and Technology Co., Ltd. has invested heavily in its own scientific and technological innovation and project research and development, and successively acquired a number of surrounding enterprises. On the basis of lengthening the original industrial chain, it opened a separate research and development workshop, and appointed Xie Dachun to continue to set up a technology research and development team to strengthen the scientific research strength of enterprises and enhance their core competitiveness.

"Use new products and innovative technologies to save enterprises and reduce the burden on society." In Xie Dachun’s view, this is not only a technician’s obligation to society, but also an inevitable requirement for the development of modern industrial system. At this year’s National People’s Congress, new quality productivity and craftsman spirit have become hot topics together, and the close relationship between them is self-evident. He said that at present, it is an excellent stage for high-skilled talents to display their fists and feet, and he will also strive to lead his colleagues to forge a hard-working style of Excellence and diligent study, and strive to move closer to "knowledge-based, skilled and innovative" craftsmen in big countries.

Planning Wang Xiaoying

Text Sun Xuhui

Heavy rain, thunderstorms and strong winds are coming!

The Central Meteorological Observatory issued an orange rainstorm warning at 10: 00 on May 19: It is estimated that there will be heavy rainstorms in parts of southern Guangxi, most of Guangdong, southern Fujian, southeastern Yunnan and northern Hainan Island from 14: 00 on May 19 to 14: 00 on May 20. Among them, there will be heavy rainstorms in parts of southern Guangxi and southern Guangdong, and heavy rainstorms (250-300 mm) in the coastal areas of southeastern Guangxi and southwestern Guangdong. Some of the above areas are accompanied by short-term heavy rainfall (the maximum hourly rainfall is 20 ~ 50 mm, and the local area can exceed 70 mm), and there are strong convective weather such as thunderstorms and strong winds.

At 18: 00 on May 19, the Ministry of Water Resources launched a Class IV emergency response to flood prevention in Guangxi, Guangdong and Fujian provinces, requiring the three provinces and the Pearl River Water Resources Commission of the Ministry of Water Resources to pay close attention to rain and water conditions, strengthen monitoring and forecasting, issue early warning in time, strengthen emergency duty, discuss and judge and submit information, and do a good job in reservoir safety, flood prevention and response in small and medium rivers to ensure the safety of people’s lives and property. The Ministry of Water Resources sent two working groups to Guangxi and Guangdong to assist in the prevention of storms and floods.

At 12: 00 on the 18th, the National Defense General launched a four-level emergency response to flood control in Guangdong and Guangxi provinces and the Pearl River Defense General, and sent a working group to Guangdong to guide the prevention and response of heavy rainfall.

Six rivers in Guangxi experienced super-alarm floods, and the torrential rain broke records.

Affected by the heavy rainfall since 18th, the rivers of Qinjiang River, Maoling River, Fangcheng River, Hongshui River, Wuming River, Sitang River and Zhupaichong, tributaries of Yujiang River, in Guangxi, experienced 1-6m flood, among which 6 stations of 6 small and medium-sized rivers such as Sitang River, Xiyunjiang River, Qinglong River and Xihe River, tributaries of Luojiang River, experienced 0.31m-1.68m flood exceeding the police. Relevant hydrological departments in Nanning, Baise, Guilin, Fangchenggang and other cities have issued flood warnings in advance.

Early warning was issued in many places in Guangxi. At 3: 15 on May 19, Nanning Meteorological Observatory issued a yellow warning signal for lightning; At 5: 45 on the 19th, Nanning Meteorological Observatory upgraded the orange rainstorm warning signal to red. It is reported that there is guilt in Nanning city and many cars are soaked. Many people were trapped on the road by stagnant water, and some citizens smashed the wall to release water. At the same time, many meteorological stations issued rainstorm warning signals. Yulin Meteorological Observatory issued an orange rainstorm warning signal at 7: 03 on the 19th. Chongzuo Meteorological Observatory issued an orange rainstorm warning signal at 7: 35 on the 19th. Fangcheng Meteorological Observatory changed the rainstorm red warning signal to orange at 7: 16 on the 19th.

On May 19th, Guangxi Daily quoted the news released by the science popularization blogger @ China Meteorological Enthusiast that the maximum rain intensity in Nanning exceeded 1 hour and 100mm; The hourly rainfall of Longmen Port in Qinnan, Qinzhou is 189.6 mm, and the sliding rainfall of 60 minutes is 204.7 mm, breaking the record of rainfall intensity in Guangxi. In addition, the sliding rainfall of 60 minutes exceeded the hourly rainfall and sliding rainfall of 720 torrential rain in Zhengzhou.

According to the latest news, in view of the fact that the process of heavy rainfall affecting Hezhou City in Guangxi has ended, the major rivers have retreated below the warning water level and the water potential is stable, Hezhou Water Resources Bureau decided to terminate the flood prevention level IV emergency response in Hezhou City from 19: 30 on May 19. County (district) water conservancy bureaus and large reservoirs are requested to continue to do a good job in the prevention of secondary disasters that may occur after heavy rainfall and the investigation and rectification of hidden dangers, and continue to do a good job in the inspection of reservoirs on duty.

There is still a risk of heavy rain in Guangdong on the 21st.

The Guangdong Meteorological Observatory predicted on May 19th that there would still be rainstorm risk in Guangdong on May 21st. It is estimated that there will be heavy rain, local heavy rain or heavy rain in southern Pearl River Delta and cities and counties in eastern Guangdong on the 20th, heavy rain and local heavy rain in Heyuan and Meizhou, and showers and local heavy rain in other cities and counties in Guangdong.

It is estimated that there will be heavy rain to heavy rain in cities and counties in eastern Guangdong and Meizhou on the 21st, and there will be cloudy showers in other cities and counties in Guangdong. It is expected that the precipitation in Guangdong will weaken from the 22nd to the 23rd, but there will still be many (thunder) showers. Among them, on the 22nd, the heavy rain in the cities and counties in Guangdong turned to showers, and the rest cities and counties in Guangdong were cloudy with showers and partial heavy rain. On the 23rd, most of Guangdong was cloudy with showers and partial heavy rain.

Guangzhou Meteorological Observatory predicted on May 19th that there will be heavy rain and local heavy rain in Guangzhou, accompanied by short-term heavy precipitation, local short-term gale of magnitude 8, lightning and other strong convective weather, and the concentrated influence period of precipitation will be from the morning of 20th to the day.

It is expected that the impact of heavy precipitation on Guangzhou will weaken on the 21 ST, and the rain in Guangzhou will turn to showers that day; It is estimated that from 22nd to 26th, Guangzhou will be cloudy to cloudy, with thunderstorms and local heavy rain.

Guangdong Meteorological Bureau reminded on May 19 that the existing forecast conclusion shows that the rainstorm process in Guangdong will last until the 21st, when it will be the "Dragon Boat Water" statistical period, and all parts of Guangdong need to do a good job in preventing continuous heavy precipitation and its secondary disasters.

Heavy rain fell in some areas of Hunan, and the water levels of 11 reservoirs exceeded the flood limit.

On the 19th, it was learned from Hunan Meteorological Bureau, Hunan Provincial Water Resources Department and other departments that since the 18th, there have been heavy rains in 20 counties (cities, districts) in Hunan, and local winds of magnitude 8 have appeared. Affected by recent rainfall and the increase of upstream inflow, the water levels of rivers, lakes and reservoirs in some areas have risen, and the water levels of 11 reservoirs have exceeded the flood season limit. According to the monitoring of the meteorological department, moderate to heavy rain has occurred in parts of western Hunan and southern Hunan since 7: 00 on the 18th, including heavy rain in 20 counties (cities, districts) of Huaihua, Xiangxi Tujia and Miao Autonomous Prefecture, Changde, Shaoyang, Yongzhou and Zhangjiajie, and strong winds of magnitude 8 in 2 counties (cities, districts). According to the statistics of the water conservancy department on the 19th, the total storage capacity of 12 major large reservoirs, such as Wuqiangxi and Zhexi, was 15.48 billion cubic meters, 11.3% more than the same period of last year and 1.2% more than the average of the same period of many years. The meteorological department predicts that there will be moderate showers or thunderstorms on cloudy days in western Hunan and northern Hunan on the 20th, with heavy rain in the central part of Changde. From the evening of 20th to 21st, the precipitation will weaken, and it will turn cloudy in northern Hunan, with showers or thunderstorms in other areas.

Shandong issued a warning warning of the risk of severe convective weather disasters, and traffic will be affected.

Shandong Meteorological Observatory issued a severe convective weather forecast on May 19th: due to the influence of the upper trough, it is expected that there will be a severe convective weather process in the central and northern parts of Shandong Province from the afternoon of 19th to the night. There are thunderstorms or showers in northwestern Shandong, central Shandong and the peninsula, accompanied by 8-10 thunderstorm gusts, hail and short-term heavy precipitation in some areas. The cumulative average precipitation in Shandong Province is 3 ~ 5 mm, and the rainfall distribution is uneven. Among them, Dezhou, Binzhou, Dongying, northern Jinan, northern Zibo, northern Weifang and western Yantai have small to moderate local heavy rain (5 ~ 15 mm, local 30 ~ 50 mm), and the maximum hourly precipitation is 20 ~ 30 mm. Liaocheng, western Heze, Tai ‘an, southern Jinan, southern Zibo, southern Weifang and southern Yantai. The strong convective process has adverse effects on traffic, outdoor activities, agricultural facilities and offshore production.

Comprehensive from: CCTV News, Xinhua News Agency, Guangxi Daily

Original title: "Rainstorm! Break the record! The National Defense General and the Ministry of Water Resources responded quickly! Some citizens smashed the wall with hammers to release water … "

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