Market situation of mining machinery at home and abroad

2. The market price of mineral procts has recovered and risen, and the situation of mining economy has improved. With the recovery and prosperity of mining economy, the development of mining machinery will be driven. Therefore, the future market of mining machinery is good, and the development prospect is good.

3. Your idea is very good. In order to make contributions to China's top 22 enterprises, you must study the major of mechanical design and manufacturing and electrical automation in the direction of mining machinery. Only by studying hard can you get the recognition of the recruitment team and appointment officer of Shenhua head office! Learning is the first major direction. Effort is the second principle

4. The mining technology of alien mining machine is one of the best. The 52ta3 mining machine uses the quantum power saving technology, which can stabilize the power consumption, rece the cost of land occupation, and mine more efficiently. A very popular miner

5. Duan Jiaxuan, a research fellow in the machinery instry of CIC, pointed out that the construction machinery market in the second quarter was in decline, and the market was looking forward to the acceleration of affordable housing construction in the second half of the year. From the current construction progress and current situation of affordable housing in the market, there were mixed feelings. Benefited from the sustained and rapid growth of China's real estate and infrastructure investment, the growth of concrete machinery exceeded expectations, which once again highlights the inertia of China's relying on heavy instry to drive economic growth still exists

as an important part of construction machinery, the huge demand space of the market and the rapid development of the instry promote enterprises to continuously accelerate investment. With the acceleration of market investment, the competition between enterprises is also increasing. At present, the investment in the market tends to be irrational, and the market is still worried. On the basis of the decline of infrastructure investment, despite the bullish worries, the investment growth of leading enterprises has not decreased at all

according to the "2011-2015 China machinery instry investment analysis and prospect forecast report" released by CIC consultants, in the fierce market competition, market expansion is undoubtedly the common competition mode adopted by all enterprises. The market is in an accelerated state, and the competition is also accelerating, and there is a growing trend. The entry of Shantui and Liugong, together with the expansion of XCMG's concrete machinery instry, will form a direct competition with Zoomlion and Sany Heavy Instry, which have been dominating the concrete machinery instry for many years< According to Zhang Yanlin, research director of CIC, mining machinery is still a promising sub instry. The growth of mining equipment instry mainly depends on the investment in infrastructure construction. Due to the rapid development of China's economic construction, there are still many projects, including roads, railways and real estate. In the future, the development of mining equipment instry will continue to increase, The infrastructure investment kept at a certain level will become the main growth power of mining equipment instry in 2011.

6. How to say that? I think the future cloud node miner independently developed by Shenzhen's four pieces of technology is quite good. Besides its high cost performance, it is also very easy to operate. It is called the ashes miner.

7.

The most important development trend in the field of international oil and gas and solid mineral resources is the integration of global resources and market. Therefore, in the energy strategy and even the national development strategy, we must take the development and utilization of overseas resources as the core content, and establish the corresponding information base, decision-making method base and dynamic analysis model

Many developed countries, multinational oil companies, international organizations and some influential research institutions have long recognized the importance of establishing databases and decision support systems for global resource development and utilization. For example, Exxon, total and shell all have these databases and risk management systems. Among them, Exxon's global oil and gas system is the most famous. These databases and evaluation technologies are core technologies and resources within the scope of the company and will not be shared with other companies and countries. At the same time, many authoritative international consulting companies have developed similar databases and risk management systems. For example, the famous IHS company has a very detailed database, which is of high value in external services

some famous foreign research institutions or government departments, such as the International Energy Agency (IEA), International Institute for Applied Systems Analysis (IIASA) and the U.S. Department of energy (DOE / U.S.), have established energy systems to assist decision-making. The most representative energy models are the national energy modeling system (NEMS) developed by the U.S. Department of energy and the iiasa-wece3 model developed by the International Institute of Applied Systems Analysis in cooperation with the World Energy Commission (WEC)

NEMS model is a regional decision support model for energy economy developed by EIA / DOE (energy information administration of the U.S. Department of energy) in 1993. It aims to plan the impact of energy, economy, environment and security factors on energy consumption, price and security of the U.S. by simulating the U.S. and international energy markets, The most important mole is the dynamic model of global proction, consumption, resources, trade and price of oil and gas. Relying on this model, we can avoid the price risk of international oil market, the supply risk of overseas oil and gas imports, and the demand risk of domestic energy consumption

Ⅱ asa-wec E3 model is an energy economy environment decision support model based on dynamic linear programming, which was developed by Ⅱ ASA and WEC in the 1990s. It studies a series of possible situations of future society, energy consumption and technology development affected by uncertain factors by continuous and independent scenario analysis, So as to provide information support for decision makers to make long-term and short-term energy planning

China has realized that overseas development needs the support of modern risk management technology, but at present, there are only some scattered researches, and there is no systematic planning and coordinated implementation from the national level, let alone a system to support enterprises' overseas investment decisions

Domestic oil companies, especially CNPC, have been engaged in international oil and gas exploration and development for more than 10 years. In this regard, we have accumulated a lot of data and information, and also carried out a lot of research. For example, in terms of resources, the economic and Technological Research Institute of CNPC has the world basin database and the recently developed block atlas, which has accumulated some basic data and information on overseas investment environment, especially laws and regulations, contract mode, term data and investment information; The overseas center of China Petroleum Exploration and Development Corporation (CNODC) has project information and front-line practitioners from many countries. However, there is no systematic risk management system for the development and utilization of overseas resources. In contrast, small and medium-sized oil companies, especially private oil companies, lack a series of data and information support, let alone auxiliary risk management system

in terms of global mineral resources utilization, government agencies in developed countries and many multinational companies regularly analyze the distribution and potential of global mineral resources. On the one hand, they take it as an important basis for formulating national resource security strategy, and adjust resource planning and policies to deal with the risk of resource supply; On the other hand, it provides the basis for the country to formulate the resource exploration and development strategy, optimize the favorable blocks and determine the investment direction, and provides reliable guarantee for correct decision-making and recing errors

The goal of mineral resources development and utilization of USGS is to promote the integration of environmental, resource and economic factors, closely integrate the project deployment with the needs of the country and citizens, and better serve the social development and economic construction. The research contents of mineral resources mainly have four directions: first, the supporting capacity and social needs of mineral resources, the maintenance of relevant databases, the study of deposit evaluation and analysis methods, mineralization, metal minerals and metallogenic environment; Second, mining economy and national policies, survey mineral proct information (mineral proct summary, mining survey, mineral Yearbook and international mining, etc.), and provide mineral resources, geochemical and geophysical data for National Park, forest and land resource management; The third is mining environment and public health, studying the origin of abandoned ore, geochemical and geophysical background, and evaluating geological environment; Fourth, mineral technology methods and data transmission, mineral related database and information update

10. The three kinds of PLC commonly used in domestic market are Siemens Mitsubishi Omron. Which PLC manufacturers in China can independently develop and put into the market? Zhenghang, Haiwei, Xinjie, Rockwell, Schneider, GE Fanuc and other international companies are the main manufacturers in China's PLC market, and European and American companies have absolute advantages in the field of large and medium-sized PLC, Japanese companies occupy a very important position in the small PLC field. The companies in Korea and China Taiwan also have a certain market share in the small PLC field. The market share of Chinese mainland PLC manufacturers can almost ignore the application and development direction of..PLC technology.

programmable controller is called abbreviated as PLC, which is based on microprocessor and integrated with computer technology. Automatic control technology and communication technology developed from a new type of instrial control device. It has the advantages of simple structure, convenient programming and high reliability. It has been widely used in the automatic control of instrial process and position. According to statistics, PLC is the most widely used equipment in instrial automation devices. Experts believe that PLC will become the main means of instrial control and one of the important basic equipment in the future. PLC, robot and CAD / CAM will become the three pillars of instrial proction
PLC is based on the relay control logic, combined with 3C (computer, control, communication) technology, and constantly developed. At present, it has developed from small-scale single machine sequence control to all control fields including process control, position control and so on
some of the various types of PLC used in the automation system are centrally installed in the control room, and some of them are separately installed on the stand-alone equipment in the proction site. Although most of them are in the harsh electromagnetic environment formed by the strong current circuit and strong current equipment, PLC is a control device specially designed for the instrial proction environment, In the process of design and manufacture, multi-level anti-interference and component selection measures are adopted, so it has strong ability to adapt to harsh instrial environment, operation stability and high reliability. Therefore, it can be directly used in instrial environment without special measures
high reliability is the key performance of electrical control equipment. PLC adopts modern large-scale integrated circuit technology, adopts strict proction process, and adopts advanced anti-interference technology for internal circuit, so it has high reliability. For example, the average time between failures of F series PLC proced by Mitsubishi company is as high as 300000 hours. Some PLCs with rendant CPUs have longer mean time between failures. Compared with the same scale of relay contactor system, the electrical wiring and switch contacts have been reced to hundreds or even thousands of times, and the fault has been greatly reced. In addition, PLC has the function of hardware fault self detection, which can send out alarm information in time when there is a fault. In the application software, the user can also program the fault self diagnosis program of peripheral devices, so that the circuit and equipment in the system besides PLC can also get fault self diagnosis protection. In this way, it is not surprising that the whole system has high reliability
for a long time, PLC has always been the main battlefield in the field of instrial control automation, providing a very reliable control scheme for a variety of automatic control equipment, forming a tripartite confrontation with DCS and instrial PC. At the same time, PLC is also suffering from the impact of other technology procts, especially the impact of instrial PC< At present, there are about 200 PLC manufacturers in the world, procing more than 300 kinds of procts. Domestic PLC market is still dominated by foreign procts, such as Siemens, Modicon, A-B, Omron, Mitsubishi, GE procts. After years of development, there are about 30 domestic PLC manufacturers, but they have not formed a large-scale proction capacity and famous brand procts. It can be said that PLC has not yet formed manufacturing instrialization in China. In the application of PLC, our country is very active, the application of the instry is also very wide. Experts estimate that the sales volume of PLC in the domestic market in 2000 was 150000 sets (about 90% of which were imported), about 2.5 billion yuan (3.5 billion yuan), with an annual growth rate of about 12%. It is estimated that by 2005, the demand of PLC in China will reach about 250000 sets, about 3.5 (4.5 billion yuan)
the PLC market also reflects the situation of the world's manufacturing instry, which has declined significantly since 2000. However, according to the prediction of Automation Research Corp, despite the global economic downturn, the PLC market will recover. It is estimated that the global PLC market will reach 7.6 billion US dollars in 2000 and return to 7.6 billion US dollars by the end of 2005, and will continue to grow slightly
miniaturization, networking, PC and openness are the main development directions of PLC in the future. In the early days of automation based on PLC, PLC was bulky and expensive. But in recent years, micro PLC (less than 32 I / O) has appeared, the price is only a few hundred euros. With the further improvement and development of soft PLC control configuration software, the market share of installing soft PLC configuration software and PC based control will graally increase< At present, one of the biggest development trends in the field of process control is the expansion of Ethernet technology, and PLC is no exception. Now more and more PLC suppliers begin to provide Ethernet interface. It is believed that PLC will continue to transfer to open control system, especially the control system based on instrial PC< At present, PLC has been widely used in steel, petroleum, chemical, electric power, building materials, machinery manufacturing, automobile, textile, transportation, environmental protection, culture and entertainment and other instries at home and abroad. The usage can be roughly summarized as follows:
logic control of switching value: this is the most basic and most widely used field of PLC, which replaces the traditional relay circuit, It can be used not only for single equipment control, but also for multi computer group control and automatic assembly line. Such as injection molding machine, printing machine, stapling machine, molar machine tool, grinder, packaging proction line, electroplating line, etc; Analog control: in the process of instrial proction, there are many continuous changes, such as temperature, pressure, flow, liquid level and speed are analog. In order to make PLC process analog, it is necessary to realize a / D conversion and D / a conversion between analog and digital. PLC manufacturers proce matching a / D and D / a conversion mole, which makes programmable controller used for analog control; Motion control: PLC can be used to control circular motion or linear motion. In terms of the configuration of control mechanism, it was used to connect position sensor and actuator directly in the early stage of switch I / O mole, but now it generally uses special motion control mole. Such as single axis or multi axis position control mole which can drive stepping motor or servo motor. Almost all the procts of major PLC manufacturers in the world have motion control functions, which are widely used in various machinery, machine tools, robots, elevators and other occasions; Process control: process control refers to the closed-loop control of temperature, pressure, flow and other analog quantities. As an instrial control computer, PLC can program various control algorithms to complete closed-loop control. PID regulation is a widely used regulation method in general closed-loop control system. Large and medium-sized PLC have PID mole, many small PLC also have this function mole. PID processing is generally to run a special PID subroutine. Process control is widely used in metallurgy, chemical instry, heat treatment and boiler control; Data processing: modern PLC has the functions of mathematical operation (including matrix operation, function operation, logic operation), data transmission, data conversion, sorting, table lookup, bit operation, etc., which can complete data collection, analysis and processing. These data can be compared with the reference value stored in the memory to complete a certain control operation. They can also be transferred to other intelligent devices by using the communication function, or they can be printed and tabulated. Data processing is generally used in large-scale control systems, such as unmanned flexible manufacturing systems; It can also be used in process control systems, such as some large-scale control systems in papermaking, metallurgy and food instry; Communication and Networking: PLC communication includes the communication between PLC and other intelligent devices. With the development of computer control, the development of factory automation network is very fast. All PLC manufacturers attach great importance to the communication function of PLC, and have launched their own network systems. Recently proced PLC has communication interface, so communication is very convenient.