The production process of the pressing plate of Hai'an Sanyi railway, the function of the railway track fastening system, the railway rail fastening is a part used to connect the rail and sleeper (or other types of under rail foundation) on the track, also known as the intermediate connecting part. Its function is to fix the rail on the sleeper, keep the gauge and prevent the rail from moving in the longitudinal and transverse direction relative to the sleeper. The railway rail fastening system is divided into three parts: spring piece fastening system, fastening plate fastening system and spring strip fastening system.
The curve can be increased properly according to the turnout size requirements, but it is not allowed to be smaller than the required size. 9¡¢ The center distance of double track in the yard shall not be less than 1200mm. 10¡¢ The track timber at the turnout installation shall be considered as 400mm center distance, and the long wood shall be used at the turnout tip and switch rail. 11¡¢ Special clamp plate must be used for the connection of two kinds of tracks. 12¡¢ The track shall be laid according to 600mm gauge, the deviation of straight section shall not be greater than 10mm, and the gauge of curve section shall not be greater than 620mm. 13¡¢ The curve radius of the upper and lower grade change points shall not be less than 9m. 14¡¢ The track is 22kg / m. Wood sleepers are used to lay the upper opening and the inner track of the full mechanized mining cut. Standard for wooden sleeper: cross section: width not less than 140mm, thickness not less than 120mm, length not less than 1200mm, and standard crossing is adopted for crossing. The Road timber is 2400mm long. Cement sleepers shall be used in other places.
Crawling of the center rail can cause friction between the pull plate of the center rail and the external locking rod. Normally, the locking rod is on the top of the pull plate. When the switch equipment is switching, the pull plate moves in an arc as per the rail, and the external locking rod moves in a straight line under the action of the action rod. After the core rail crawls, if the external locking rod falls off completely or partially on the pulling plate, the two will be stuck and the turnout cannot be pulled normally. Therefore, when the temperature changes greatly, joint treatment must be carried out to eliminate the impact of crawling on the electrical equipment. Most of them adopt the method of square steel sleeper to make the rod smooth and reach the standard, and also adjust the position of a and B.
Type II guard rail transformation fastener, type II guard rail transformation fastener: this standard is applicable to the field transformation of type II bridge sleepers of existing lines. The distance between 50kg / M guard rail and main rail changes from 200mm to 50mm. Type III rail protection transformation fastener, type III rail protection transformation fastener: it is applicable to the field transformation where the distance between the existing line rail protection and the main rail changes from 220mm to 500mm. This product is applicable to the laying section of ballasted masonry bridge with 50kg / m or 60kg / M guard rails on the standard gauge railway. After assembly, the clear distance between the basic rail and the guard rail head reaches 50mm, which meets the requirements of large-scale tamping bridge operation. Type of iron base plate: 43kg iron base plate, 50kg iron base plate, 60kg iron base plate.
With the rapid development of urban rail transit in our country, the problem of vibration reduction and noise reduction of rail transit is becoming increasingly prominent, which has aroused widespread concern of the society. Compared with many damping methods such as elastic boots, rubber floating plate and ballast pad, the damping fastener has the outstanding advantages of high cost performance, convenient construction and maintenance, and good damping effect, which has been widely used in the field of damping and noise reduction of urban subway and light rail transit. Generally speaking, the research on the damping fastener in China is still in the initial stage. The product design mainly imitates and improves the foreign products, fails to reach the design level of process analysis and practice guidance, lacks systematic research on the effect evaluation of the damping fastener, does not form a complete and unified standard series, the test methods are relatively confused, and some test indexes are set without basis, which is new The R & D and application of type-A shock-absorbing fastener bring great difficulties. According to the practical experience, the author summarizes a set of reasonable test and data processing methods, in order to provide help for the research and development of the subway damping fastener.
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