1. Asphalt mixture mixing equipment
Asphalt mixture mixing equipment is the production of mixing a variety of asphalt mixture of mechanical devices for highways, urban roads, airports, wharves, parking lots, freight yards and other construction projects.
The development of asphalt mixing equipment in China is characterized by: late start, rapid development. Domestic asphalt mixing equipment from the late 1960s, when the start of foreign aid projects developed LB30 (30t / h) forced intermittent asphalt mixing equipment, from the beginning of China's asphalt mixing equipment manufacturing industry. 80s ("Eighth Five-Year Plan" plan) the introduction of 1000-type asphalt mixing equipment, asphalt mixing equipment, asphalt mixing equipment, asphalt mixing equipment, asphalt mixing equipment, asphalt mixing equipment, asphalt mixing equipment and other equipment, asphalt mixing equipment, asphalt mixing equipment. Asphalt mixing equipment, after l995 and the introduction of 3000-type asphalt mixing equipment, so that China's asphalt mixing equipment technology on a new level. Through the introduction of technology, digestion, absorption and technical cooperation and other forms, the domestic successful development of 2000 and 3000 type asphalt mixing equipment. Into the 21st century, asphalt mixing equipment blossomed everywhere in China, and now many companies have successfully developed 4000, 5000 type asphalt mixing equipment, domestic asphalt mixing equipment has reached the contemporary international level of technical performance, in the construction of highways play an important role. With the rapid development of China's highway construction, the demand for asphalt mixing equipment continues to increase, international brands have entered the Chinese market, Mariani (Marini), Oman (AMMANN), NIKKO (NIKKO), GENCOR (formerly ACP), Lintage, and other companies have been set up in China to support processing plants. Foreign brand companies in China, on the one hand, to improve China's asphalt mixing equipment, the overall design and manufacturing level, on the other hand, caused by the fierce competition in the domestic market. At present, the annual output of domestic forced batch asphalt mixing plant is about 600 sets.
2. Asphalt paver
Asphalt paver is one of the special construction machinery for asphalt pavement, which is widely used in asphalt paving operation in highway, city road, large-scale cargo yard, parking lot, wharf, and airport projects.
China's asphalt paver development also began in the 1960s, 4.5m asphalt paver in the 80s gradually formed a mass production in the construction of highways played a positive role. With the rapid development of highway construction, highway construction requires the use of large-width and high-performance pavers, so foreign pavers have entered China one after another. In order to improve the technical level of domestic asphalt paver, Zhenjiang Brilliance Huatong introduced Japanese paver technology in 1985, Xizhu introduced Dynapac-Hos paver technology in 1987, XCMG introduced German Vogele paver technology in 1989, and Shaanjian introduced German ABG paver technology with 12m paving width in 1992. Through the introduction, digestion and absorption of technology, China's asphalt paver technology has made a big leap, and the technical performance of domestic pavers has been close to the contemporary international level, which has become the main force of China's highway construction. With the rapid development of highway construction, international brands have entered the Chinese market. In 1997, Ingersoll Rand set up Wuxi Road Machinery Co., Ltd. in Wuxi, Jiangsu Province; in 1999, Dynapac set up a wholly-owned factory in Wuqing Development Area of Tianjin for the production of rollers and pavers, followed by the establishment of wholly-owned companies of Bomag in Shanghai and Wirtgen in Langfang, Hebei Province. The entry of foreign brand companies into China, while improving the overall design and manufacturing level of asphalt pavers in China, has on the other hand caused fierce competition in the domestic market. At present, the annual output of domestic asphalt mixture paver is about 1,200 sets.
3. Stabilized Soil Plant Mixing Equipment
Stabilized soil plant mixing equipment is one of the main types of pavement engineering machinery, which is widely used in the construction of grass-roots level and sub-base level of highways and urban roads, and also applies to other cargo yards, parking lots, airports, and other projects that require stabilized materials.
China began to develop stabilized soil plant mixing equipment in the 1980s, and has produced nearly 1,000 sets, playing a backbone role in China's highway construction. Most of the domestic stabilized soil plant mixing equipment adopts the combination of movable or part of the components can be moved in the form of structural layout, product specifications in the range of 50 ~ 300t / h. At present, the domestic equipment in the technical performance, appearance and quality, durability, manufacturing precision and other aspects of the international advanced equipment, compared with, but there is still a certain gap. Therefore, to improve the technical performance and quality of our products, the development of new varieties, multi-specification series of products and large-scale, is the main direction of China's future development and research of stabilized soil mixing equipment.
4. Asphalt Sprinkler
Asphalt Sprinkler in road construction machinery is one of the longest history of use of pavement engineering machinery, in the use of asphalt penetration method of surface treatment, permeable layer, viscous layer, mixing and asphalt stabilized soil in situ and other construction and maintenance works, asphalt Sprinkler is used to spray a variety of liquid asphalt materials (including hot asphalt, emulsified asphalt).
The 1950s, China's highway pavement began to black, but when the spraying of asphalt is used to hand-pressure sprinkler. 50 ~ 60 years from the Soviet Union to introduce self-propelled asphalt sprinkler. 1963 South Central Highway Engineering Agency Repair and Distribution Plant (predecessor of the Chenzhou Road Machinery Factory) in the Soviet Union on the basis of the asphalt sprinkler began to develop domestic asphalt sprinkler from the point of view of the level of the industrial level, the model in the construction of highways to improve the efficiency of the asphalt sprinkler, and to improve the quality of the asphalt sprinkler. machine type in highway construction to improve labor productivity and promote the development of asphalt highway construction. Asphalt sprinkler innovation is from the beginning of the 21st century, international technical exchanges as well as the progress and popularization of electronic information technology for the advancement of China's asphalt sprinkler technology to provide technical and material guarantees. At present, the domestic self-developed intelligent asphalt sprinkler, compared with the traditional asphalt sprinkler, intelligent asphalt sprinkler is mainly characterized by: thermal oil as a heat transfer medium to heat up the asphalt, changing the traditional heating with a fire hose is easy to make the asphalt aging disadvantages; the use of automatic ignition of diesel fuel burners, you can manually set the temperature as needed, automatic heating of the asphalt, the temperature is fast to meet the needs of the modern modified asphalt spraying Temperature ≥ 175 ℃ needs.
5. Stone Chip Spreader
Stone chip spreader can be according to the construction requirements, will be a certain specification of the stone continuously, quantitatively and evenly spread in the roadbed has been sprayed with asphalt, pavement base or surface layer. When using layer paving method construction of asphalt pavement, asphalt sprinkler according to the construction requirements in the road surface evenly sprayed viscous layer of asphalt, and then the stone chips spreading machine spreading stone, and finally compacted with the roller.
China in the 1960s began to promote the use of layer paving method of repairing asphalt pavement technology. Early asphalt pavement construction process is the use of asphalt sprinkler sprinkling asphalt, artificial spreading of stone chips of the original construction method, not only requires a large number of laborers, but also low efficiency, poor quality of spreading, labor intensity, and pollution of the environment. 1978 developed SA3C-type self-propelled stone chip spreader, the provinces and cities of the transportation system of the manufacturing plant has also developed a small self-propelled stone chip spreading machine, towed or suspended stone chip spreader, but none of them are not formed. Spreader, but have not formed a mass production scale. Into the 80's, with the construction of asphalt pavement quantity increase, layer paving method of construction technology is basically replaced by the hot mix method, especially the high grade asphalt pavement are used in the construction of hot mix method, so the production of stone chip spreader is not big, and its technology has not been corresponding development and improvement.
II. Pavement maintenance machinery
The construction of highways cost huge investment, and highways in the process of use, due to the repeated role of driving vehicle loads and natural factors of erosion and destruction, as well as material aging and environmental pollution, coupled with the design and construction of some of the defects left behind and hidden, so that the highway to produce different forms of degradation, damage to the highway's performance continues to weaken the highway to limit the smoothness of the highway until the interruption of traffic and highway reconstruction. Interruption of traffic and highway reconstruction. Therefore, the highway in the use of the process, the highway must be appropriate maintenance, so that the highway network lasting good condition, in order to maintain the safety of the highway and normal traffic, in order to make the highway investment to produce good benefits. Since the development of road maintenance machinery in China is relatively late, there is still much room for development. Road maintenance machinery mainly includes: comprehensive maintenance vehicles, grouting machine, thin slurry sealing machine, milling machine, regeneration equipment.
1. Comprehensive maintenance vehicle
Review of China's highway construction development, 50 ~ 60 years is the era of gravel pavement, and then gradually develop residual oil pavement, asphalt pavement, until today's highways. With the rapid development of the national economy, highway mileage in the year-on-year growth, while transportation is increasingly busy, these have aggravated the task of highway maintenance, we have made a lot of efforts in the mechanization of highway maintenance.
The early 1970s developed a multi-functional asphalt pavement repair vehicles, which is basically a small mobile asphalt mixer, due to the existence of low efficiency, energy consumption, quality is difficult to ensure that the reliability of the poor, etc., has not been popularized. 80 years of the early asphalt pavement repair vehicle development and production has been a great progress in the selection of domestic automobile chassis, the use of electric power, hydraulic transmission and other means. The development and production of asphalt pavement repair trucks made great progress in the early 80s. With the need for highway development, many countries' asphalt pavement repair vehicles and their technologies have entered our country one after another, promoting the development of China's comprehensive maintenance vehicles.
Currently, the development of comprehensive maintenance of the car mainly has three types of products: ① with a hot storage tank of asphalt pavement maintenance car, ② asphalt mixture regeneration maintenance car, ③ with a heated wall of the asphalt pavement maintenance car, etc.. Comprehensive maintenance vehicle is an indispensable maintenance equipment for highway maintenance work, so it has broad prospects for development.
2. Grouting machine
Grouting machine is a kind of special equipment for road maintenance. Although the cracks formed in the early stage of the pavement function has little impact, but the cracks will gradually weaken the expansion of the structural load-bearing capacity, while the cracks seepage leads to the grass-roots level below the structural layer of the scour and water stability problems, resulting in network cracks, cracks and other diseases, reduce the level of service of the pavement, affecting the use of the pavement function. Grouting is a preventive maintenance measure that can extend the service life of asphalt pavement, and the construction cost is low.
Domestic grouting machine started late, with the rapid development of China's highway construction, early domestic grouting operations can only be introduced into the foreign grouting machine, the domestic grouting machine is also in reference to the introduction of foreign grouting machine on the basis of the development. At present, a number of domestic enterprises can produce grouting machine, but a single model, small capacity, only suitable for small area crack repair operations, most of the construction is still manual and semi-mechanized operations. With the rapid development of China's highway construction and highway maintenance system reform, the development and improvement of domestic grouting machine technology will be a strong promotion.
3. Thin slurry sealing machine
Thin slurry sealing as an effective means of preventive maintenance of highways, has been a large number of highway maintenance departments to pay attention to and use.
China's earliest application of thin slurry sealing technology is in 1981, when Liaoning Province in aid of the construction of Zambia's Seaman Highway using emulsified asphalt thin slurry sealing for double-layer surface treatment. 1987 Liaoning Province, the organization of the thin slurry sealing machine for the study, the development of self-propelled and semi-trailer-type emulsified asphalt thin slurry sealing machine to promote China's development of thin slurry sealing technology. 1989 and later, Henan and Guangdong successively introduced the three slurry sealing machines, which were used in the construction of Zambian highway. In 1989 and later, Henan and Guangdong successively introduced three thin slurry sealing machine, the introduction of these models to ensure the quality and speed of thin slurry sealing, and promote the application of thin slurry sealing technology. On the basis of the introduced technology, Henan Province jointly developed RT-30 thin slurry sealing machine. In addition, Hebei Lulong developed self-propelled thin-slurry sealing machine, XCMG introduced German technology to develop SOMl000-2 thin-slurry sealing machine, Shenyang Northern Traffic developed PM8000 thin-slurry sealing machine with reference to foreign technology in 2001, and Xizhu developed and designed MS9 series thin-slurry sealing machine with international advanced level on the basis of absorbing foreign technology in 2002. sealing machine.
4. Milling machine
Pavement milling machine is one of the main types of asphalt pavement maintenance and construction machinery, mainly used for highways, town roads, airports, freight yards, parking lots and other asphalt concrete surface layer of the excavation and renovation, and widely used in asphalt pavement repair and maintenance construction.
China's pavement milling machine development began in the 1980s, began to Xiangfan, Hubei to Tieh Niu 66 tractor as a chassis developed a simple 1m milling machine; 1987 Zhenjiang Pavement Machinery Factory with reference to foreign models developed a LX50-type milling machine; in 1990, Tianjin Road and Bridge Department of the machine shop also developed a LX1000-type milling machine. In the following 10 years, China is in the road building boom, pavement repair and maintenance is not very urgent, the demand for milling machine is very small, so the domestic milling machine did not get the corresponding development, mostly in the municipal sector for daily maintenance operations.
With the development of China's highway construction and the increase of road maintenance demand, the demand of pavement milling machine is also increasing, a large number of foreign asphalt pavement milling machine into the domestic asphalt pavement milling machine has also been developed faster. 1999 after the joint venture of Zhenjiang Brilliance Huatong Road Machinery Co. LXZY1000 type milling machine. Subsequently, a number of enterprises have also developed 1000mm milling machine; XCMG introduced the production technology of 2m model from Wirtgen of Germany; in 2000, Zhenjiang Brilliance Huatong Company developed the first milling machine with recycling device in China on the basis of 1m milling machine, which made the domestic asphalt pavement milling machine an important step in the direction of the whole series. Since 2002, some domestic manufacturers are optimistic about the market potential of pavement milling machine, some enterprises have developed and manufactured large-scale pavement milling machine with modern hydraulic transmission technology and electronic control technology on the basis of the experience of similar foreign products.
5. Regeneration equipment
Asphalt pavement regeneration equipment is the old asphalt pavement material reprocessing to make it restore the performance and reuse of machinery, suitable for cracks, rutting, deformation and abrasion of the asphalt pavement repair works, is one of the special machinery for pavement maintenance. China's regeneration of old asphalt pavement materials in the development of slower, in recent years, such as Beijing, Shanghai, Guangdong and other old asphalt pavement materials have been carried out in the recycling project. With the development of China's highway construction, highway mileage continues to grow, the old asphalt pavement recycling technology will be widely used in the country. Domestic by copying foreign products, in the asphalt mixture mixing equipment with a renewable material heating drum, this new model in a number of enterprises can produce. From 2002 Beijing-Tianjin-Tanggu Expressway maintenance project began, in situ heat regeneration technology quietly emerged in China, there are several enterprises in the development of in situ heat regeneration equipment. In recent years, cold regeneration technology in China has also been a relatively long development, many provinces and cities to carry out the emulsified asphalt and foam asphalt cold regeneration technology based on research and application work.
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