Improvement and Application of Dutch Pump Unloading Valve

Improvement and Application of Shanxi Metallurgy Dutch Pump Unloading Valve Shanxi Mobile Aluminum Machinery Co., Ltd. Du Jian + Jia Jianjun Taiyuan Aluminum Plant Zhang Jianli and Application Effectiveness The Dutch pump is the core equipment for the production of alumina Bayer process in the Shanxi Aluminum Plant, in which the unloading valve It is a key component of the Dutch pump and its structure is a safety protection device for Dutch pumps. This part requires high wear-resistance, high-rigidity seals, accurate opening, quantitative unloading, and high manufacturing precision. When the Dutch pump is running at a high load, when the working pressure exceeds 72, 75, the unloading valve will automatically open to perform the quantitative unloading pressure work, so that the Dutch pump can operate normally under the specified working conditions. This part has been directly imported and used since it was put into use. Since 1996, it has made improvements in its localization. After years of use, its performance has reached and exceeded that of imported similar products.

1Manufacturing Process Physical Mapping Physical Physical Performance Testing Material Physical and Chemical Analysis Determination Material National Standard No. Selection Material Manufacturer Purchase Raw Machining Micro Pearlite Ball 200 Crack Inspection Fine Mechanical Processing Local Protection Quenching Local Protection Coating Removal CNC Grinding 200 Inspection Oxidation Grinding 200 Testing assembly pressure seal test into inspection.

6 block 7 left and right bushings; 8 apron Du violation of the peak, male, born in 1967. In 1989, he graduated from Taiyuan Type 1 Stack College of Metallurgical Machinery. Shanxi Aluminum Plant is now moving from place to place, setting up management work. WORKING 2 unloading valve structure improvement brief description According to the unloading valve soil working principle and operation situation, combined with the damage analysis and material analysis of repairing the damaged unloading valve, the damage of the Dutch pump unloading valve is mainly caused by stress damage. . Applying the principle of stress analysis to improve the linear sealing angle of the piston in the unloading valve in the surveying and mapping structure, and changing the linear sealing angle of the inner piston in the original surveying and mapping structure from 50 to the change of the linear sealing angle of the piston in the 552 unloading valve. Stress analysis The principle of line strain and angular strain is to reduce the stress deformation. In an ideal state, and other factors do not change, such as the mechanical properties of the material, the outer piston of the setting unloading valve does not have a displacement, and when the relative displacement of the inner piston occurs in a microscopic state, the linear sealing angle is deformed. The displacement at any point in the sealing angle of the piston within the time can only be the result of pure deformation. Before deformation, if any point 3 is first divided into arbitrary equal parts and considered as parallel and equal independent line segments, then after the pure deformation becomes six, it is clear that the length of each line segment still needs to be equal. That is, whether it is stretched or shortened, it is uniform in any part of the entire line segment. Therefore, according to the line strain and angular strain theory, when the elastic displacement, the greater the contact surface, the smaller the line stress and the angular stress deformation. Therefore, when the linear sealing angle of the piston in the unloading valve increases, the contact area between the piston and the sealing surface of the outer piston increases, the stress deformation decreases, the strength of the sealing surface of the unloading valve increases, and the dynamic life will be prolonged.

By changing the angle of the linear seal angle of the piston in the unloading valve, the Dutch pump unloading valve component was produced. After more than 4;1 production applications, it was proved that the component has fully achieved and exceeded the imported components in the work performance, and the price is only About 14 imported parts have created considerable economic benefits.

1 Xu Hongwen. Stress Analysis M. Beijing Science Press. In 1964, he took the second most specialized training class on page 2 and trained 193 qualified personnel. The gradual increase in the number of specialized talents in the production line posts has made it possible to solve the contradiction in which the type of work has been set up finely and all staff members are tight, and the efficiency of the use of the labor force has been greatly improved. In the past, it took a few jobs to cooperate with each other, and the phenomenon of dragging and buckling often occurred. Now, only a generalist can complete the task, creating conditions for reducing people's efficiency. For example, the number of workers in the grinding section was reduced from 1 to 49, a reduction of 51.49. After the reduction in personnel, it not only did not affect the production, but also greatly improved the sense of responsibility of the workers.

Due to the high level of comprehensive job qualifications for multi-talented talents, the orientation of the allocation is only to be able to do more work. Therefore, the workers have high enthusiasm for learning techniques, and many robbers and entrants have become irresponsible. Highly-skilled jobs have become hot spots for competition and become multi-faceted. Workers have become increasingly competitive. Workers are increasingly pursuing the continuous improvement of the quality of the workforce. Innovation has set a solid foundation and formed an inexhaustible motive force for the rapid development of the company.

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