From the perspective of the industry, construction machinery is an indispensable construction machinery for infrastructure, construction, and various civil engineering projects. It mainly includes shovel transportation machinery, lifting machinery, pumping machinery, piling machinery, and pavement machinery. The theme of this year's construction machinery market is driven by 4 trillion investment. Among them, rotary drilling rigs and road machinery in pile-driving machinery are the direct beneficiaries of infrastructure construction, with the fastest growth. However, rotary drilling rigs and road surface machinery are relatively small in the industry and among mechanical companies, and therefore do not have a significant impact on the operation of companies. Lifting machinery is used in various types of real economy, such as factories, power equipment hoisting, high-speed railways, urban rail transportation, etc. Infrastructure construction has quickly driven the demand of cranes; shovel transportation machinery is mainly used for various types of infrastructure construction. , is the main beneficiary of 4 trillion investment.
The implementation of the policy of expanding domestic demand is the main driving force driving the growth of fixed asset investment in China. It is expected that with the further implementation of various policies, the growth rate of investment in fixed assets will further accelerate. From the data observation, in the first quarter of 2009, China’s total investment in fixed assets reached 2,812.9 billion yuan, a year-on-year increase of 28.8%. Among them, urban fixed asset investment reached 2,352,2 billion yuan, accounting for 83.8% of total investment, up 28.6% year-on-year; rural fixed asset investment was 456.7 billion yuan, accounting for 16.2% of total investment, up 29.4% year-on-year. From the above data, we can see that in the first quarter of 2009, China’s investment was mainly concentrated in urban areas, and rural investment was significantly lower. In the urban fixed assets investment, the state-owned holding investment was relatively high, at 1.0036 trillion yuan, a year-on-year increase of 37.7%; real estate development investment was 488 billion yuan, an increase of 4.1% over the same period of last year. The investment in urban fixed assets in China is mainly local project investment, with the investment amounting to RMB 2,155.5 billion, which represents a year-on-year increase of 28.5%, accounting for 91.06% of the total urban investment. The amount of investment in the central project was 210.7 billion yuan, accounting for less than 10% of the total.
In the short term, the industry recovered under the stimulation of infrastructure investment, and construction machinery had excess returns in the second quarter. With the gradual emergence of infrastructure investment results, rebound in real estate sales, and recovery in exports, construction machinery is expected to continue to improve in the second quarter. In the long term, the industry is facing a huge and continuously growing domestic market and a relatively large international cost advantage. Relatively optimistic about cranes, rotary drilling rigs, excavators, concrete equipment, bulldozers and loaders, it is recommended to pay attention to Sany Heavy Industry, Zoomlion, and XCMG Technology. In addition, Zhenhua, currently a pioneer in the field of offshore machinery equipment, has long been known for its port machinery. Heavy industry and so on.
Pneumatic ball valve is a ball valve equipped with a pneumatic actuator. The execution speed of the pneumatic actuator is relatively fast. The fastest switching speed is 0.05 seconds / time, so it is usually also called pneumatic quick cut-off ball valve. Pneumatic ball valve is usually equipped with various accessories, such as solenoid valve, air source treatment triplet, limit switch, positioner, control box, etc., to realize local control and remote centralized control. The valve can be controlled in the control room without running to the site or high altitude and dangerous areas for manual control, which saves human resources, time and safety to a great extent.
The pneumatic ball valve can be closed tightly only by using the pneumatic actuator to rotate 90 degrees with the air source and a small rotating torque. The completely equal inner cavity of the valve body provides a very small resistance and straight flow channel for the medium. It is generally considered that the ball valve is most suitable for direct opening and closing. The main feature of the ball valve is its compact structure and easy operation and maintenance. It is suitable for general working media such as water, solvent, acid and natural gas, as well as media with poor working conditions, such as oxygen, hydrogen peroxide, methane and ethylene. The ball valve body can be integral or combined.
Pneumatic butterfly valve is composed of pneumatic actuator and butterfly valve. Pneumatic butterfly valve is a pneumatic valve that uses the circular butterfly plate rotating with the valve stem as the opening and closing property to realize the opening and closing action. It is mainly used as a block valve. It can also be designed to have the function of regulation or section valve and regulation. Butterfly valve is more and more used in low-pressure large and medium-sized pipelines. Classification of pneumatic butterfly valve: stainless steel pneumatic butterfly valve, hard seal pneumatic butterfly valve, soft seal pneumatic butterfly valve and carbon steel pneumatic butterfly valve. The main advantages of pneumatic butterfly valve are simple structure, small volume, light weight and low cost. The characteristics of pneumatic butterfly valve are particularly remarkable. It is installed in a high-altitude concealed channel, controlled by two position five way solenoid valve, easy to operate and can also adjust the flow medium.
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