helped Anna dry her clothes, and Li Ruoyu sat on the sofa and watched TV with the two girls.

Anna said at this time: "Ruoxiang, this time I will go back, ready to formally submit a report to the company, and then join the family to invest in concrete machinery in China, now you should be happy!" ”

Li Ruoyu said excitedly: "Anna, this, is this true?" That's great! Now China's concrete machinery industry has just started, it is the time to promising, if you come to invest, to ensure that you make a lot of money! ”

Anna glanced at Li Ruoyu and said, "Don't be too optimistic!" Whether it can be approved or not is not certain! Now I need you to find a way to provide me with some information on the history and development status of China's concrete machinery industry, so that it will be convincing! ”

Li Ruoyu smiled: "No problem, I can provide this!" ”

Indeed, Li Ruoyu is a person who has crossed back, how can he not know the history and future of the development of China's concrete machinery industry!

Anna smiled, "I want to count jù accurately!" ”

Li Ruoyu smiled: "No problem, I'll talk to you first, and I'll make a report to you when the time comes!" I remember that between 1986 and 1992, that is, last year, several domestic construction machinery factories cooperated to develop a cantilever dragline mixing plant with a twin-horizontal shaft as the main engine, and the domestic mixing plant began to be popularized and applied in the construction of building concrete. However, the technology and quality of these domestic mixing plants are far inferior to foreign products, so this is a good time for your foreign concrete machinery companies to come to China for development. ”

Li Ruoyu remembers that in 1992, Comrade Xiaoping's southern tour brought spring to the construction industry, the vigorous reform and opening up, so that the construction industry has stricter requirements for concrete, and the construction site put forward the requirements for the measurement of sand and gravel for 0.35 cubic meters and 0.50 cubic meters of mixers, which brought vitality to the development of the batching station. At that time, Shaanxi Provincial Construction Machinery Factory, Dongshan Provincial Construction Machinery Factory, and Dongshan Fangyuan Group became the leading enterprises in the development and production of this kind of product, and this two-stage mode of measuring with batching station and sending materials to the mixing host with a belt conveyor, but there has long been this design abroad, and the arrival of Li Ruoyu has changed the concrete industry.

Li Ruoyu said: "The development of China's concrete mixer truck began in 1966, when two domestic construction machinery factories cooperated to develop the JC2 mixer truck. The car with 8 tons of Yellow River brand car as the chassis, mixing drum capacity of 5.7m3, is China's first self-designed mixer truck, to fill the domestic gap, in 1969 began mass production. The car from 1966 to 1984 by a domestic construction machinery factory exclusive production for 18 years, until now, some domestic enterprises also use domestic liberation brand cars, or trailer-mounted traction chassis to develop a 2?3m3 mixer truck, but because it is not suitable for on-site construction and has not been promoted. ”

Anna smiled: "It's true that these technologies are too backward, and the transportation volume of concrete mixer trucks is too small!" ”

Li Ruoyu nodded and said: "The development of China's concrete mixer truck started from the introduction of technology. In the early 80s of the 20th century, the influx of a large number of foreign concrete machinery forced domestic enterprises to meet the needs of the domestic market, first from the mixer truck, especially the state allowed the planned purchase of large-tonnage automobile chassis, for their own design and manufacturing to create favorable conditions. In the 80s, a domestic construction machinery factory introduced the manufacturing technology of Japanese companies in the form of combining technology and trade. ”

Of course, Li Ruoyu knows that if the development history of concrete machinery in the previous life is continued, it will not be until 1995 that the first concrete machinery joint venture was established between Xugong Group and German Haibuli Company; In 2001, Beizhong Group and concrete machinery companies from Spain and France established North Concrete Special Vehicle Co., Ltd. Following this, some domestic construction machinery enterprises have cooperated with relevant companies in Germany and Italy to produce mixer trucks to meet the needs of the market. In 2008 alone, the annual output of mixer trucks in China reached more than 17,000 units, which is definitely a huge industry.

Anna smiled: "I remember that Japan is not very friendly with you China? You are still using their technology, although the Japanese technology is good, but it is far worse than our Germany! ”

Li Ruoyu nodded and said, "This is also something that can't be helped!" Your foreign governments are the neck of our country, and they are unwilling to pass on some advanced technology to China! But now that it's the nineties, these problems should be much better. Speaking of concrete pumps, several domestic construction machinery factories introduced the technology of the German elephant company at the end of the eighties. Now this product has just been successfully trial-produced, but the annual output is only a few dozen units, so this model should be very good. Of course, the advanced technology of on-site construction with concrete pump trucks was introduced to China as early as the mid-60s of the 20th century. ”

Li Ruoyu remembers that in the early 70s, during the construction of the first three gates in Beijing, the Ministry of Construction and Beijing included the development of concrete pump trucks in the plan. In 1977, Changsha Construction Machinery Institute, Langfang Mechanization Research Institute and Shenyang Vibrator Factory jointly designed and developed a 23m boom pump truck with Huanghe brand automobile as the chassis in Changsha. The machine is the first S-valve concrete pump truck developed by China and identified in Beijing. Due to the use of domestic hydraulic parts, the pumped concrete additives and S valve concrete trailer pump, due to the use of electro-hydraulic and other key parts of the international accessories, soon opened the market, by 1994 the annual output has reached more than 300 units.

In 1994, Wuyi Heavy Industry also developed a concrete trailer pump with independent intellectual property rights. The competition between the two enterprises in the same city has greatly promoted the development of concrete pumping machinery. In 1995, the National Development and Reform Commission issued the task of developing complete sets of commercial concrete equipment, which were completed by several strong domestic construction machinery factories such as 37m and 42m boom pump trucks, 75m3/h concrete mixing plants, 8m3 concrete mixer trucks and cement unpacking machines, and completed the project acceptance in 1997.

Due to the demand for large-scale economic construction after the reform and opening up in the 90s of the 20th century, the demand for concrete machinery has increased significantly, which has greatly promoted the development of domestic enterprises. By the end of the 90s of the 20th century, there were more than 50 enterprises that only produced concrete pumps, and many enterprises began to introduce or purchase pump truck parts for domestic assembly.

Li Ruoyu said with a smile: "Now commercial concrete complete sets of equipment or ready-mixed concrete are commonly used in key projects in China, but more than 90% of the pumps, stations and vehicles of the three major equipment are imported. There is a company in Hunan Province, in order to change the situation that foreign products dominate the world over pumps, vehicles and stations, first cut from the concrete pump, and on the basis of decades of technical accumulation, it developed China's first concrete pump truck with completely independent intellectual property rights last year. So now is a good time to enter the concrete machinery industry. ”

Anna smiled, "I see! Then I'm confident! I'm sure you'll hear the good news soon! (To be continued.) )