According to the statistics of the China Construction Machinery Industry Association and other institutions, there are currently more than 50 companies with sales of over 1 billion yuan in the domestic construction machinery industry, and the number has accounted for more than 80% of the total number of enterprises in the industry. Currently, only listed construction machinery enterprises are There are more than 10 companies including Sany Heavy Industry and Zoomlion. According to China's A share market's listing standards for enterprises, most companies in the industry can meet the corresponding performance requirements.
According to the above-mentioned sources, with the promulgation of the "Planning", the relevant policies to encourage enterprises' listing and financing will further stimulate the companies' market impulse. Therefore, it can be expected that during the "Twelfth Five-Year Plan" period, the construction machinery industry will be expected to enter the company's market-intensive period.
“At present, some outstanding engineering machinery companies in Shandong and Hunan are planning to go public.†The above sources said.
"Planning" shows that the "Twelfth Five-Year Plan" national plan has fostered the development of aircraft carrier-type internationally renowned companies and a group of specialized, refined and special small and medium-sized enterprises through policy support and other means.
Among them, build 3 or 4 enterprise groups with sales of 100 billion yuan and 5 or 6 groups of 500 billion yuan, becoming internationally renowned companies; at the same time, support the development of a group of specialized, refined, special, and well-developed companies. Small businesses make the industry structure more rational.
The above authoritative sources pointed out that according to the “planningâ€, the sales volume of the construction machinery industry at the end of the “Twelfth Five-Year Plan†period will reach 900 billion; at the same time, China’s railways, highways, security housing and other areas still maintain stable investment. These factors will ensure the steady development of enterprises. However, if enterprises are to achieve leapfrog development, they will still face the pressure of factors such as the rising costs of capital, raw materials and labor. Therefore, through the listing and financing will help companies achieve the goal of further development.
"Planning" also shows that, in addition to traditional fields, with the adjustment of China's industries during the "Twelfth Five-Year Plan", water, aerospace, environmental protection, ocean engineering and other fields usher in a new industrial cycle. Therefore, during the “Twelfth Five-Year Plan†period, we will speed up the research and development of offshore engineering construction machinery, develop comprehensive technologies for recycling and reuse of urban construction waste, and accelerate the development of urban waste treatment and comprehensive utilization equipment.
Deco Investment Analysis believes that the demand for construction machinery in related markets such as water conservancy, aerospace, and environmental protection will further increase in the future. The corresponding construction machinery companies are expected to become the industry’s “new enthusiasm†and usher in high-speed growth.
There are many kinds of pneumatic pipes, which are generally produced with PU raw materials, with stable quality, high pressure resistance, weather resistance, wear resistance, zigzag resistance, smooth and flexible pipe body, bright color, high elasticity, winding resistance and small bending radius.
The tube body is smooth and flexible, bright color, high elasticity, winding resistance and small bending radius. Temperature range: - 15 - + 70 ℃.
Product classification
1. Pu pneumatic pipe
2. Pu (polyether) pneumatic pipe
3. Pu (polyurethane) bobbin
4. Pu (polyether) bobbin
difference:
Polyurethane pneumatic pipe is over air type. If it is used for over water, its service life will be affected,
Polyether pneumatic pipe can pass air or water, with more stable physical properties and longer normal service life. It is an ideal material for pneumatic pipe.
The bobbin is wrapped with a layer of fiber in the middle of the common pneumatic pipe. Therefore, the bobbin is more solid, pressure resistant and non explosive than the common pneumatic pipe.
Product selection
What should be considered when choosing the type of plastics for blow molding pneumatic pipe?
The following aspects should be considered in the selection of pneumatic pipe materials.
Whether the wall thickness of the welded blank of the pneumatic pipe can be kept uniform, whether a higher blowing pressure is needed, whether the blowing is uniform, whether the surface of the pneumatic pipe is bright, whether the demoulding is easy, and whether the strength can meet the requirements, etc.
Performance comparison of plastics for blow molding pneumatic pipe. The pneumatic tube formed by blow molding is in thermoelastic state, and its density is smaller than that after cooling and shaping, resulting in shrinkage. For the general size of pneumatic pipe is not strict, forming shrinkage has little effect. But for the pneumatic pipes of specified size, such as some hoses used in precision machines, large shrinkage has a considerable impact. The larger the blowing volume is, the more significant the effect is.
The advantages of extruding and blowing plastic forming pneumatic pipe are less investment in production equipment, simple equipment structure, easy mold manufacturing, high forming of pneumatic pipe during production, uniform temperature control, and various specifications of pneumatic pipe can be formed. The disadvantage is that the wall thickness uniformity of pneumatic pipe is poor.
The advantages of injection blow molding pneumatic pipe are that the plastic pneumatic pipe has good product quality, accurate dimensions, no seams, uniform wall thickness, multi-mode molding production, high degree of automation, which is very suitable for large-scale high-efficiency production of small specifications. The disadvantage is that the investment of equipment and molding die is large, and the operation and production need skilled workers.
Product advantages
Excellent flexibility. The bending radius is small and the bending resistance is good. It has high elastic recovery memory effect.
Wear resistance, tearing and impact. It can resist some non corrosive chemicals and oils. It can circulate inflammable objects and weld.
It can be incinerated into ash 100% and is recognized as an environmental protection product
Good damping, smooth inner wall, low friction coefficient, high medium passing capacity, good flame retardant, non-toxic and tasteless,
The color can be customized on demand for easy pipeline identification.
Applicable range of pneumatic pipe
Assemble all kinds of pneumatic tools, pneumatic automation machinery, air compressor and all kinds of connecting pneumatic components.
performance parameter
Abrasion resistance: 30mg
Ultimate elongation: 390-480%
Burst pressure: 20-30kgf / cm2
Working vacuum: - 25hg60-15kgf / cm2
Tensile strength: 300kgf / cm2
The safety factor ratio of burst pressure and long-time service pressure is 3:1
Tips for pneumatic pipe
Polyurethane pneumatic hose is suitable for compressed air, ordinary industrial water and non corrosive oil. In order to maintain a long service life, it must be used under rated working pressure and ambient temperature. As the temperature rises, the working pressure should be reduced accordingly. If it exceeds the limit, the hose may break. If the fluid temperature is too high or the fluid is corrosive, the hose may break. If the working environment temperature is too high or there is chemical gas in the working space, the hose may crack. If the hose is stored in a wet place or the storage period is too long, the hose may hydrolyze or age, which may lead to fracture
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