Pipe cleaning of hydraulic system in hydraulic lifting platform

Pipeline Cleaning of Hydraulic System in Hydraulic Lifting Platform Mechanical Factory of Gansu University of Technology Liu Wei Song Yaojun Liang Haofeng 1 1 Overview We designed 13 hydraulic lifting platforms for the Chongqing Grand Hall. These lifts use the same hydraulic station, and each lift has its own independent valve station to control it. Due to the area and location of the lifting platform, the hydraulic system is a crucial part.

The principle of the hydraulic system is as follows. It does not include the consideration of the pipeline cleaning when the hydraulic station 2 system is designed according to the technical requirements. The required flow rate per elevator is 201. If all the pipelines are flushed at the same time, the displacement of the cleaning pump needs to be large, which makes the cleaning cost too high and is not feasible. and so. When designing a hydraulic system, we must consider the cleaning of the pipe to reduce the cost of the lifting platform.

For each lifting platform, the hydraulic system is constructed in the same way, that is, each lifting platform adopts the idea of ​​unit design, and two shut-off valves are added at the entrance of each lifting platform hydraulic system. When flushing. Only open the shut-off valve at the lifting platform.

The remaining shutoff valves are closed. In this way, we can use a small displacement cleaning device to flush the pipeline unit by unit. Avoid flushing equipment with large displacement. Reduce the cost of the equipment, 3 pipeline cleaning steps The pipeline cleaning of the project is divided into two steps: pipe pickling and oil circulation flushing. The so-called pipe pickling is before the hydraulic pipe is prepared. Pickling and rust removal of cold drawn tubes. The pickling method may be a tank soak pickling or a cyclic pickling. Sandblasting and rust removal methods are allowed. We use a tank soak pickling. It also uses its own acid pickling formula and process flow. The pickling process and formulation are as follows when selecting an antistatic agent. In addition to considering its antistatic properties, it is also necessary to consider other factors. For example, whether there is any influence on dyeing, whether it is corrosive, chemical stability or low price, etc. 4 Antistatic textiles have many applications in antistatic textile applications, such as antifouling. Anti-adhesive civil textiles, clean clothes such as clean clothes for purifying air, and indoor decorations such as work clothes carpet curtains in explosive atmospheres. Various industrial materials, etc. With the machinery. Advances in industries such as electronics and stricter requirements for the cleanliness of clean rooms. The performance requirements for dustproof clothing are also higher, especially in the electronics industry. Microparticles of around 1:1 can cause certain hazards. Therefore, the industry needs to develop dustproof clothes with higher performance. In addition to requiring no dust to pass through dust, chemical resistance is also required. Washing resistance. Resistance to steaming and heat sterilization to wear a variety of performances, 5 antistatic finishing evaluation evaluation of antistatic effect is mainly to determine the amount of static electricity on the fabric. The amount of static electricity is usually the static voltage half-life and the surface specific resistance. The decay time is the time required for the charge on the fabric to decay to half the initial voltage. The logarithm of the charge decay speed on various fabrics is positive with the logarithm of the surface resistance. Up to 14 with dilution, wash =, water washed with acid pickling at room temperature with 101 as the standard hot air (4) overheating in the air before the water is blown to dry, the neutralization of the F dry coating 汕 wrapped through the above process and formula pickling pipeline Fully metallic, no money spots. Innocent J 3.2 oil circulation flushing oil circulation flushing can be used for in-line circulation flushing and off-line circulation flushing. The so-called in-line circulation flushing refers to the use of the system's own working pump for circulating flushing; the line-night flushing is used in the circulating flushing. Fuel tank and flushing pump. Because the original system is expensive. In order to make the system run reliably. An off-line circulation rinse was used. Specialized flushing equipment was designed to perform pipe-by-unit flushing of the pipeline with a lower viscosity No. 2 mechanical mooring. We should pay attention to the following points when flushing the system in the oil cycle. Strictly follow the rush to return to the bath. The scam is used as an anvil to start the sputum and change. If the sluice is leaking, the pump should be stopped immediately; the wall will be knocked every 12 hours. The focus is on the weld flange flange and the elbow. Knock it evenly around the circumference.

Do not knock only the edges, causing the tube to deform; when the oil is flushed. The reversing valve should be frequently reversed to improve the effect of circulating flushing; always pay attention to the contamination of the oil filter.

The filter element should be replaced immediately after it is found to be contaminated; the proportional directional Control Valve in the system must be removed during flushing and replaced with a flush block designed by itself. After the flushing is passed, remove the flushing block and install the proportional reversing valve. Because the flushing site is large, it should be equipped with communication equipment; equipped with fire prevention measures.

4 Cleaning results and conclusions Because the pipeline cleaning of the hydraulic system is a very important part, we have made overall considerations in the design of the scheme. After the system pipeline is cleaned through strict acid washing process and formula and special circulating flushing equipment, the oil sample is taken to the requirements of the proportional system.

Other pipe cleaning similar to the hydraulic system can refer to the pipe of this system. The larger the ratio of the person to the 8 is, the longer the half life is. The slower the static dispersion rate. Measurement of static electricity on fabrics. A friction type electrostatic measuring instrument such as a high-pressure discharge type electrostatic measuring instrument is usually used. The surface specific resistance of the static electricity on the fabric can be measured by the direct effect of antistatic finishing. Generally, the standard is as follows, and the antistatic effect is as bad as the end.

The aspect is to reduce the rushing process and find the production of the sputum; the other is to improve the electrical conductivity of the fiber. In order to speed up the leakage of electric charge, the phenomenon of friction during processing and use is inevitable. Therefore, conductive fibers with better manufacturing performance are the basic direction for the development of antistatic technology for textile materials. In the textile production process, an antistatic agent can be added to reduce the interference of static electricity. The textile industry has now become a high-tech industry. In many areas where the future has great potential. Antistatic textiles are among them. It will be used more and more in industrial and civilian applications. References