《道岔论文（Turnout paper）》由会员分享，可在线阅读，更多相关《道岔论文（Turnout paper）（15页珍藏版）》请在金锄头文库上搜索。
1、道岔论文（Turnout paper）After the sixth speed increase of the railway, the line and turnout equipment of the public works have changed greatly, which has brought many difficulties to the maintenance. The switch is a whole linkage, it relates to a car service, public works, communication department, mista
2、kes in one sector, it will affect the train speed, heavy traffic interruption, will bring direct losses to transport. In recent years, with the constant application of the speed increasing turnout, its daily maintenance and maintenance has become a basic work in the maintenance organization system o
3、f the maintenance section. Railway is the foundation to improve the railway transport, how to do the maintenance work works line equipment, railway transportation safety and lay a solid foundation is the duty to ensure the safety of railway transportation is very important. In order to meet the need
4、 of speed increase, the speed limit of train turnout is eliminated, and the safety consciousness and sense of urgency are firmly established. Strengthen equipment renovation, improve equipment operation quality, provide a strong foundation for ensuring safe production, improve the comprehensive econ
5、omic benefits for railway disease, combined with the existing speed switch rail turnout maintenance problems are as follows:1 turnout diseases and related analysisSince the speed increase of railway in China, turnout has been widely used because of its high passing speed, less maintenance work and l
6、onger maintenance period. However, as the speed increases, there are many diseases in the turnout. Through the summary of typical diseases of the switch tube, were analyzed and the mechanism of its formation, puts forward some countermeasures of typical diseases of turnouts, the scene to guide the r
7、ailway maintenance work.1.1 common diseases(1) the mud.(2) swing and deviation of turnout sleeper.(3) the steel pillow is empty hanging and rusted.(4) concrete sleeper bolt cut and nylon casing wear failure.(5) rail crawling.(6) rail lateral bending.(7) switch rail side wear.(8) rail and rail is not
8、 close.(9) the gauge of switch is enlarged.(10) slide plate and groove guard rail plate welding.(11) pin out and string of shrapnel.(12) serious corrosion of fittings.(13) splice a variety of diseases (low joint, wrong mouth, saddle shaped wear, rail end dropping, collapsing and collapsing).(14) the
9、 distance between the gusset plate and the rail bottom edge is separated from the seam.(15) the guard on the tab on the high.(16) rail corrugation.Classification of 1.2 Turnouts(1) the diseases left over when the turnout is assembled and pavedIncluding the main diseases of the turnout in laying lega
10、cy assembly railway electrification, electrification buried column makes linkage turnout of two in the intersection offset caused by crossing the line direction of rail, rail and basic side guard rail parts of rail bent; concrete sleeper interval is not the correct location and side offset; two asse
11、mbling joints without laying founder.(2) typical diseases in the operation of turnouts;The typical diseases produced in the operation of turnouts are: parts corrosion and wear; heel pad connection broken; slide bed Uunsoldering; pad collapse damage; earth foot bolt (30 x 165 mm) nylon casing failure
12、; plate hole wear, corrosion pore size of rail surface wave type; abrasion; guard rail wear; rail and base rail side wear; lateral rail corrosion; basic rail undulation wear;Expand the central rail gauge; pit hanging plate etc.(3) there are maintenance problemsIf in the repair and maintenance aspect
13、s of improper handling, also can make the railway disease. For example: lack of personnel works on turnouts of daily maintenance, assume that the switch does not need to conduct a comprehensive way to speed up switch tamping; left the assembly when the laying of the disease, and did not take measure
14、s to rectify the corresponding method; machine tool maintenance equipment used cannot adapt to the new requirements; treatment works operation people take on the disease properly, causing diseases such as gradually.Cause analysis of 1.3 main diseases1.3.1 bed mudThe turnout of mud is mainly due to t
15、he replacement of turnouts, blocking time is short, construction or lack of preparation by the existing profile that suboccipital clearing thickness is insufficient, caused by poor drainage. Especially, at the end of the first switch signal base effect of drainage, mud is more prominent. In recent y
16、ears, we combine line overhaul construction, to speed up switch using CD-2 type switch tamping machine of high road (road capacity up to 200mm), by this way to increase turnout sleeper ballast cleaning thickness, elastic recovery bed. With the supernatant sieve slope, enhance roadbed drainage, basically solved the above 70% turnout of mud problem. The other 30% turnout due t
