The national standard GB/T28569-2012 "Electric Vehicle AC Charging Pile Electric Energy Measurement" led by the State Grid Corporation of China was approved by the General Administration of Quality Supervision, Inspection and Quarantine and the National Standardization Administration, and will be officially announced on November 1. Implementation.
At present, China's electric vehicle industry is in a critical period of growth, but the long-term lack of unified charging facilities standards has become a major obstacle to the development of the electric vehicle industry. In order to accelerate the construction of electric vehicle charging facilities and promote the development of electric vehicle industry and low-carbon recycling economy, in 2010, the China Electric Power Enterprise Association Standardization Management Center issued the “2010 National Standard Plan Application Projectâ€. "Electric Vehicle AC Charging Pile Energy Measurement" covers the technical requirements for electric energy measurement of electric vehicle AC charging piles, as well as the configuration and installation requirements, test methods and inspection rules of electric energy metering devices. The implementation of this standard will provide standard support for the commercial operation of charging facilities, provide technical basis for standardizing the design, production and acceptance of AC charging piles and charging pile energy metering devices, and promote the development and application of electric vehicle and charging facilities industry.
It is understood that since the "Ninth Five-Year Plan", China's electric vehicle sub-labeling committee has organized industry forces, and has formulated and approved by the standardization department, the number of electric vehicles has reached 51, including 36 national standards and 15 automotive industry standards. Supported the evaluation of results of electric vehicle technology projects, demonstration operation of electric vehicles, new energy vehicle enterprise access and product access management. In addition, it also includes 6 electric motorcycle standards.
Up to now, there have been 12 standards for completion of the technical review and approval; there are 28 standards that are being revised by the standard plan; there are currently no standard plans, but 41 standards have been initiated for the previous study.
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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