Q:What are the world famous mechanical equipment exhibition?

1, the German BMW Exhibition (BAUMA) sponsored by: Messe M nchen GmbH, held every three years, has held 30 sessions, the thirty-first will be in April 2016 11-17 in the German city of Munich exhibition centre. The German international engineering machinery, building materials machinery, mining machinery, construction vehicles and Equipment Expo is the world's largest and most influential international engineering machinery, building materials machinery, mining machinery industry exhibition, every three years regularly held in Munich in germany. The fair combines science and technology, trade, information and technical cooperation

Q:What is a door rack for a construction site? How high is it generally?

This depends on the erection of the height of the general 3 steps and within 5-6 yuan a meter, assuming the erection of 4.5 meters high, 22.5-27 yuan a square. This is calculated in accordance with single-layer, the higher the more expensive, 9 meters in 65 yuan or so square. In accordance with the establishment of meters, in accordance with the erection of the volume of the calculation.

Q:What are the principles, performances and uses of the commonly used construction machinery equipment?

1.: concrete pump principle: concrete pump driven by motor pump system, the conveying capacity of constant power control of hydraulic system of concrete pump automatic control, manual control can also be used to select the concrete delivery volume. Performance: 1. using the hydraulic system of double pump double open circuit, the main pump valve swing circuit and S circuit are separate for fault diagnosis and removal; 2. pumping hydraulic circuit adopts the main valve pilot pressure control; 3. hydraulic system has safe relief protection, while the main pumping system overpressure, oil pump automatic pressure cutting off; 4. switching circuit with constant voltage supply with the energy storage device, so as to guarantee reliable swayingforce large and have the advantages of energy saving effect; 5. pumps and valves are used continuously, the world famous brand is more reasonable and more reliable and easily realized commodity concrete transport quantity adjustment; 6. hydraulic pipeline with cone seal pipe joint sealing material; 7. pumping circuit adopts a valve block mode of high and low voltage switch, convenient, no leakage; 8. with oil and oil filter technology, foreign body into the hydraulic system. Further improve the hydraulic system reliability and component life; 9. hydraulic hose hose. Use: widely used in commercial concrete demand for large, high grade and strict quality requirements, long conveying distance of high-rise buildings, municipal construction, electric power, energy, transportation and other civil and industrial buildings, especially the construction of the narrow space more show its true colour of a hero.

Q:Building materials, equipment, components and fittings products must have "three certificates" is what cards?

Three is a business license, certificate of product quality, product quality inspection certificate. Business license is the legal provisions of some industries must be licensed, and handled by the competent department of the operating permit, such as tobacco monopoly license, drug business license, business license and other dangerous chemicals.

Q:What is the use of spare parts prices in Chinese market by foreign companies?

But there is always somebody to ask, just like a college paper, where everyone can read or keep secrets, but collecting them and sending them to foreigners is a sign of treason

Q:What measures can effectively reduce the construction accident rate?

Hefei construction workers training _ eliminate dangerous source: eliminate the risk source of the system can fundamentally prevent accidents. But an important point of system safety is that it is impossible to completely eliminate all sources of danger and that people can only selectively eliminate several specific sources of danger. Generally speaking, when the risk of a dangerous source is higher, we should first consider whether we can take measures to eliminate it. A dangerous source can be completely eliminated by selecting the proper production process, technology, equipment, reasonable design, structural form or suitable raw material. For example: instead of the power system with pneumatic or hydraulic system, to prevent the occurrence of electrical accidents; instead of compressed air system for hydraulic system, to avoid the pressure vessel, pipeline rupture caused by shock wave; with incombustible materials instead of combustible materials, to prevent the occurrence of fire. It should be noted that sometimes measures are taken to eliminate certain sources of danger, but new sources of danger may be brought about. For example, an electric pneumatic system instead of a power system can prevent electrical accidents, but a physical explosion accident may occur in the compressed air system.

Q:What are the sub projects of a construction project?

Appendix B Construction Engineering Division (sub branch) engineering, sub project division, B.0.1 Construction Engineering Division (sub branch), engineering, sub projects can be divided into table B.0.1. Table B.0.1 division number of construction works, sub works and sub projects

Q:What type of industry does the machinery and building accessories processing belong to?

There are only three tax categories in our country: 1 consumption tax, 2 VAT, 3 special tax (agriculture). Therefore, as long as the manufacturing or processing of industrial value added tax on enterprises. It has nothing to do with the economic nature, classification and categories of an enterprise.

Q:What functions should be achieved in mechanical structure design?

Mechanical structure design plays an important role in mechanical design. This chapter mainly discusses the characteristics, steps and mode of thinking of mechanical structure design. The working principle and design requirements of the machine assembly is a major factor in determining the structure and shape of the parts, followed by the selection of materials, manufacturing process requirements, which has the advantages of good manufacturability (processing and assembly). In addition, the perfection of the structure and shape of the parts has a great influence on the strength and stiffness.

Q:What are the mechanical drawing software?

Personally, CAD is suitable for large machines or buildings, and CAXA is the real machine industry's universal software, and can also save drawings in various formats.