At present, China's internal common standard fasteners have been oversupply, while high-end fasteners (high temperature, special-shaped, titanium-plastic composite, special-performance fasteners, etc.) are in short supply, and rely on imports. The State Bureau of Machinery classified "ordinary standard fasteners" as restricted development products and "high-strength special-shaped fasteners" as the current encouragement to develop products. High-strength fasteners With the improvement of the industrialization level and technological progress of the country, the usage has gradually increased.
China's domestic fastener manufacturers of all sizes should look to the future. High-speed railways, such as the Hangtai Aviation Airport, are key projects for high-end enterprises. The Boeing Company plans to add 3,400 aircraft in the next 20 projects and the National Development and Reform Commission will invest 8 RMB 0 billion will be used for the construction of rail transit in 6 cities. According to 36 plans to build urban rail transit project cities, by 2020, the new operating mileage of urban rail transit will reach 6,560 kilometers, and the demand for rail fasteners will reach 55 percent. -7 billion yuan. These large-scale projects will greatly increase the demand for high-strength fasteners such as high-strength fasteners and titanium alloys, and it is not impossible to remove low-end labels.
According to reports, during the 12th Five-Year Plan period, the number of construction machinery such as loaders, excavators, and road rollers will reach 6 million units, and the annual sales volume will be around 50,000 units. According to this estimate, the annual demand for high-strength fasteners is about 20,000 yuan. ~ 3 million tons. It is estimated that by the end of 2015, the total output of the industry will reach 7.5 million to 8 million tons; under the overall situation of expanding exports, the export products will assume a fluctuating growth trend, and the average annual export growth rate is expected to be 8% to 10% during the 12th five-year period. By 2015, the total export volume of the industry will reach 30 billion yuan.
The replacement process of excavator hydraulic cylinder is as follows:
1. Turn off the hydraulic system: Before replacing the hydraulic cylinder, it is necessary to turn off the system to avoid liquid leakage in the hydraulic system.
2. Disassembling the hydraulic cylinder: Disassembling the hydraulic cylinder requires the use of tools such as wrenches, screwdrivers, etc. Firstly, the hydraulic pipeline needs to be removed, and then the bolts of the hydraulic cylinder need to be removed to remove the hydraulic cylinder from the machine.
3. Check the hydraulic cylinder: Check if there is any damage to the hydraulic cylinder, and if there is any damage, replace it.
4. Install a new hydraulic cylinder: Install the new hydraulic cylinder onto the machine and secure the cylinder with bolts.
5. Connect hydraulic pipeline: Connect the hydraulic pipeline to the hydraulic cylinder, pay attention to the position and direction of the connection, and ensure that the connection is secure.
6. Test system: after replacing the hydraulic cylinder, it is necessary to test whether the system operates normally, check whether the hydraulic cylinder operates normally, and deal with any problem in time.
7. Cleaning work: Clean the liquid and debris in the hydraulic system to ensure that the system is clean and avoid any impact on the system.
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