The method of determining the magnitude of possible changes to the section length is fixed rail scourge of jointless tracks
(57) Abstract:Usage: used to define possible changes in the length of the plot is fixed rail scourge of jointless tracks influenced by temperature, and a train load. The inventive equalize the temperature of the fixed and unfixed same plots rails, find the value of absolute values of the mechanical stresses in the fixed track section of the scourge. Excite the same ultrasonic pulses in fixed and unfixed sections of the rails, take pulses that have passed through the fixed and unfixed sections of rails, measure the propagation time of a pulse through the respective areas and determine the difference between the propagation velocity of ultrasound in the pinned section of the rail relative to the loose section of rail. 1 Il. The invention relates to methods for determining the value of possible changes in the length of the plot is fixed rail scourge of jointless tracks influenced by temperature, and a train load and so on, i.e. for the measurement of mechanical stresses in this section of rail scourge of jointless track.The known method of opredelisja is that equalize the temperature of the fixed section of rail scourge and loose the same with him part of the rail, determine the value of absolute values of the mechanical stresses in the fixed track section of the scourge and hence the magnitude of possible changes in the length of this section (ed. St. USSR N 1710640, CL E 01 35/00, 07.02.1992 ).The disadvantage of this method is the lack of accuracy of measurements due to the presence of a large number of contacts, as a loose fit any of these contacts will cause additional electrical resistance and affect measurement accuracy.The technical result of the invention is to improve the accuracy of measurements of the absolute values of mechanical stresses, therefore, determine the magnitude of possible changes in the length of the plot is fixed rail scourge of jointless track.This result is achieved in that in the method of determining the magnitude of possible changes to the section length is fixed rail scourge of jointless tracks, namely, that equalize the temperature of the fixed section of rail scourge and loose the same with him part of the rail, determine the value absolutego change the length of this section, after a specified temperature compensation excite the same ultrasonic pulses in said fixed and loose parts, determine the rate of passage of impulses through these areas, and the magnitude of absolute values of the mechanical stresses in the fixed track section scourge is determined by the velocity difference of the ultrasonic pulses in said fixed and loose parts.The drawing shows a diagram of a possible device that implements the method.The device consists of transducers 2, connected to the generator 1, and the receiving transducers 3 installed on 4 lashing and fixed 5 parts of rails, and receiving transducers 3 are connected to the interferometers 6 and 7 and registrars 8 and 9, by means of which determine the propagation time of ultrasonic waves and, consequently, the speed of ultrasound through a fixed distance in the rails. Data obtained velocities of ultrasound is received in the unit of comparison results 10, and the final result is issued to the fixing unit 11, and this unit can produce any of the required values: the absolute value of the mechanical example is Lisovoy scourge.The method of determining the magnitude of possible changes to the section length is fixed rail scourge of jointless tracks as follows.Required to determine the magnitude of possible changes in the length of the particular section of the fixed rail scourge of jointless tracks, for example, for 300 mm For comparison is taken to be the same along the rail, with the ability to change their linear dimensions under the influence of external factors. Aligns the temperature of loose and fixed sections of rails. On the fixed and unfixed sections of rails are installed converters 2 and 3, and the distance between the transducers in fixed and unfixed sections of rails are equal. The generator 1 through the converters 2 are excited identical ultrasonic pulses, which are received by the transducer 3 and in the case of fixed track section scourge mechanical stresses, these pulse transformers 3 will be taken simultaneously, and that will be fixed block comparison results 10 after processing interferometers 6 and 7 and registrars 8 and 9. Determined by the difference of the propagation velocity of ultrasound is using the well known dependence:
< / BR>where l is the largest possible change in the length of the plot is fixed rail scourge of jointless tracks, mm;
L is the length of the fixed section of the rail, through which is passed an ultrasonic pulse,mm;
the magnitude of the mechanical stresses in the fixed section of the rail, MPa;
E is the modulus of elasticity of rail steel, MPA (E=210000 MPa), it is possible to determine the magnitude of possible changes in the length of the plot is fixed rail scourge of jointless tracks, which will give the unit a final result.The proposed method of determining the amount of possible changes in the length of the plot is fixed rail scourge of jointless tracks will improve the accuracy of the measurement of absolute values of the mechanical stresses in the fixed track section of the scourge and, therefore, to determine the magnitude of possible changes in its length.The possibility of a loose section of the rail is free to change their linear dimensions when aligning its temperature with the temperature of the fixed section of rail scourge leads to the fact that the magnitude of the mechanical stresses in the lashing rail, in the absence of exposure to other external factors, at any temperature equal to zero and, sledovat rublennogo sections of rails and distance during which determine the propagation velocity of ultrasound, are equal at the time of measurements, it will allow us to determine the absolute values of the mechanical stresses in the fixed track section of the scourge and, therefore, to determine the exact value of the magnitude of possible changes in the length of the plot is fixed rail scourge of jointless track.When carrying out the invention the absolute value of the mechanical stresses in fixed track section scourge of jointless tracks is determined by the propagation velocity of ultrasound, and not by electrical resistance. The method of determining the magnitude of possible changes to the section length is fixed rail scourge of jointless tracks, namely, that equalize the temperature of the fixed section of rail scourge and loose the same with him part of the rail, determine the value of absolute values of the mechanical stresses in the fixed track section of the scourge and hence the magnitude of possible changes in the length of this area, characterized in that after a specified temperature compensation excite the same ultrasonic pulses in said fixed and netgraph mechanical stresses in fixed track section scourge is determined by the velocity difference of the ultrasonic pulses in said fixed and loose parts.
FIELD: railway transport; permanent way facilities.
SUBSTANCE: invention is designed for checking parameters of track. Proposed track gauge contains housing, device for measuring gauge width with movable and fixed stops to thrust against rail heads, rail level measuring device and device to measure ordinates and grooves of switches. Including vernier with stop to thrust against head of move-off rail or counterrail and interacting with digital indicators on gauge housing. Vernier is provided with additional stop to thrust against non-worn-out part of rail head. Rail side wear detector interacting with vernier is installed on gauge housing.
EFFECT: enlarged operating capabilities of track gauge, reduced errors in measurement.
2 cl, 3 dwg
FIELD: railway transport; measuring facilities.
SUBSTANCE: invention relates to special purpose devices for measuring separate geometric parameters of reinforced concrete ties, i.e. propelling and canting of rail flats on reinforced concrete ties. Proposed device contains housing 1 with fitted-on transport handle 2, right-hand support 3 and left-hand support 4. First support screw 5 and second support screw 6 are installed on right-hand support 3, third support screw 7 and fourth support screw 8 are installed on left-hand support 4, right-hand catcher 9 and left-hand catcher 10 are installed on ends of housing 1, sensor 11 is secured on first support screw 5. Housing 1 carries also right-hand orientation handle 13 with pushbutton 15 and left-hand orientation handle 14. Base 16 is fastened in central part of housing 1, controller 17 and supply compartment 18 being secured on base 16. Device for measuring rail flat canting contains housing 1 with fitted-on transport handle 2, right-hand support 3 and left-hand support 4. First support screw 5 and second support screw 6 are installed on right-hand support 3. And third support screw 7 and fourth support screw 8 are installed on left0hand support 4. Right-hand catcher 9 and left-hand catcher 10 are installed on ends of housing 1, first sensor 11 is secured on first support screw 5, and second sensor 19 is installed on fourth support screw 8. Housing 1 carries right-hand orientation handle 13 with pushbutton 15, and left-hand orientation handle 14. Base 16 with fitted-on controller 17 and supply compartment 18 is secured in central part of housing 1. Moreover, support 21 is connected to housing 1 through vertical rods in central part.
EFFECT: improved efficiency of measurements, increased accuracy and provision of operative measurement of parameters under checking.
3 cl, 2 dwg
FIELD: railway transport.
SUBSTANCE: invention relates to method of diagnosing condition of railway and street car tracks. Proposed device contains detectors designed for measuring deviation of gauge and position of track by level of sags, humps and cavities connected with contact members. Device contains also vertical parallel, inner and outer posts, rollers made for interaction with side working inner surfaces of side track, rollers made for interaction with upper working surfaces of rail track, jambs some ends of which are connected with roller races and others, with corresponding posts. One of detectors is made in form of dial indicator, being arranged on one of inner posts and coupled with roller-type contact elements made for interaction with side working inner surfaces of track. Rod of said indicator is in contact with upper end of other inner post. Springs are placed between inner post. Springs are placed between inner posts in upper and lower parts, mounted on upper surface of two pairs of bosses fitted on one axle. Holes are made in inner posts. Axle with bushing is placed in inner posts. Bracket is connected by one end to bushing, and other end of bracket serves for fastening to floor of test car. Second detector is made in form of metric rule secured to inner post, and two pointers secured on upper end faces of outer posts. Two pairs of slots are made on outer posts. Slots are arranged on one axis and they accommodate pins installed for movement. Pins are provided with stops from outer and inner parts of posts.
EFFECT: improved reliability of device, reduced cost, possibility of reading results of measuring directly from detectors.
FIELD: railway transport; permanent way.
SUBSTANCE: invention relates to method of noncontact inspection of profile of ballast base passing square to longitudinal direction of track. Inspection is carried out together with recording of deviation of track in level and in position. Depending on recorded defects as to level (a) and profile of ballast base 13 obtained for said level, amount of crushed stone for lifting track 4 to preset level and uniform ballasting is determined. To find amount of crushed stone required for ballast base 12, recorded profile of ballast base 13 is applied to preset profile of cross section 14.
EFFECT: improved ballasting of track.
3 cl, 4 dwg
FIELD: railway transport; permanent way.
SUBSTANCE: invention relates to method of grading of existing bed of railway in which cables and/or pipes are laid beyond the limits of rails, and to laser measuring device to read bed profile. According to proposed method, operator removes material of bed by sucking through definite steps along bed to form pits or cross trenches at each side of track, and using laser camera, checks profile near pit and position of buried cables or pipes and stores obtained information. Then, using information kept in memory, operator controls device for mechanical digging of material from both sides of track without risk of damage to buried cables or pipes and profile of graded bed. Laser measuring device is mounted on railway motor car with cross guide beam 12 and carriage with laser camera which can be moved along guide beam. Laser camera is pointed with its lens downwards to read distance from ground, being connected with computer to record position of bogie on rails and distance from camera to ground.
EFFECT: provision of safe, quick and cheap method of railway bed grading with use of laser measuring device.
6 cl, 6 dwg
FIELD: railway transport; permanent way testing facilities.
SUBSTANCE: method of pulling contact system cable comes to the following: each rail 6 is read off by means of distance pickup 16 placed over rail and moved continuously in longitudinal direction of track and scanning in plane 20 passing square to longitudinal direction of track. Problem points of measurement 25 on rail defining geometry of switch are recorded as measurement values in polar system of coordinates. Polar coordinates for measurement values are converted into Cartesian coordinates and information is recorded in memory at continuous measurements of distance by means of measuring wheel after which lateral section for switch 1 is calculated basing on recorded measurement values. Actual measurement values are compared in definite points of measurement 25 with preset values of at least two of enumerated parameters kept in memory, namely, width of clearance between counter-rail and running rail, through clearance or state of tongue as to its wear, minimum width between edge of guide rail and side edge of running rail in curve, width of gauge and/or distance between counter-rails or guide surfaces and deviation of obtained values from preset values. In device for noncontact measurement of lateral section or rail-to-rail distance of track, each pickup 16 is arranged in area over corresponding rail 6 being essentially laser scanner 17 for reading problem points of measurement 25 defining geometry of switch which is made for reciprocation at angle of scanning (α).
EFFECT: provision of quick and accurate determination and evaluation of measurands of vital importance for switch.
4 cl, 6 dwg
FIELD: railway transport; track maintenance.
SUBSTANCE: geometry of track is measured by using high-accuracy measuring circuit with two mechanically coupled test trucks forming transport and mechanically coupled test trucks forming transport and mechanical part of measuring system and including covered distance meter and truck tilting level sensors relative to horizon and at least one radiating mark (optical radiation source) rigidly installed on first test truck in direction of movement and providing pressing of flange of wheel to inner head of base rail, and optical electronic receiving-and-analyzing system rigidly secured on second truck. Second truck is double axle, with flanges of corresponding wheelsets pressed to inner surface of head of base rail, thus forming measuring base identifying position of base rail in points of contact of corresponding wheelsets.
EFFECT: improved accuracy of measurement at simplification of process.
4 cl, 5 dwg
FIELD: railway transport.
SUBSTANCE: invention relates to methods of continuous recording of spatial position of track gauge. Proposed method includes recording of information from pickups of rail-to-rail space, covered distance, current course angle, longitudinal and cross grades at vehicle running and calculating of current coordinates of track gauge using data of pickups. Recording of course angle and longitudinal grade from said pickups and determination of current coordinates Xi,Yi,Hi is carried out for one of rail lines relative by any initial direction in horizontal plane at measuring pitch 1. Coordinates of point im corresponding to middle of straightline section connecting extreme points i0 and in are calculated by measured coordinates of extreme points for each preset section of track Pi. Deflection of rail in horizontal and vertical planes, δihδiv respectively, is determined by difference between calculated coordinate of indicated point and measured coordinate of corresponding point. Device for determining spatial parameters of rail tracks has running truck including support wheel and first and second measuring wheels and odometer wheel arranged on one axle over one of rail lines. Support wheel is connected with measuring wheels by link installed at angle of 90° relative to direction of running. Track gauge width pickup is installed on said link. Distance pickup is mounted on odometer wheel. Course and roll indicator is installed on axle connecting measuring wheels. Outputs of distance pickups, track gauge pickup and course and roll indicator are connected with computer through controller.
EFFECT: enlarged functional capabilities, with possibility of determination of relative position of track section in vertical and horizontal planes (level and sag), together with determination of spatial coordinates.
3 cl, 3 dwg
FIELD: railway transport.
SUBSTANCE: invention can be used for diagnosing condition of rails using combined ultrasonic and magnetic nondestructive testing devices of higher resolving power. Proposed rail track mobile testing device includes vehicle on frame of which flaw detector bogie is mounted with system for pneumatic and manual lifting of bogie I to traveling position. Tracking ski secured on frame of flaw detector bogie is provided with ultrasonic testing converters unit. Mobile device is provides also with pneumatic system for forced pressing of flaw detector bogie to rails made for adjusting force of pressing in vertical axis and with lateral stabilizing device consisting of roller carriage with flexible damping support. Series magnetizing coils of magnetic control device whose inductive sensor is installed after converters unit in rear part of tracing ski in direction of movement of flaw detector bogie, said coils being fitted on axles of wheel-steps of flaw detector bogie and connected to each other. Said magnetizing coils are installed on bearings and are arranged I protective hood secured on frame of flat detector bogie. Housing of converters unit, protective hood and frame of flaw detector bogie are made on nonmagnetic material. Wheels of flaw detector bogie are installed for independent rotation.
EFFECT: increased resolving power at diagnosing condition of rails, increased dynamic stability of device in movement along rails, reduced mass and dimensional characteristics.
2 cl, 1 dwg
FIELD: applications of measuring apparatus or devices for track-building purposes.
SUBSTANCE: control method involves setting survey points and determining coordinates of above points in X, Y, Z coordinate system; placing measuring station near structure and determining measuring station position in X, Y, Z coordinate system relative at least one survey point; determining distance and angle between above insertion device and measuring station with the use of above measuring station; calculating insertion device position on the base of above distance and measuring station position; moving insertion device to provide coincidence of above members with predetermined member insertion points along insertion axis. Insertion device comprises lever, which may perform longitudinal and rotational movement in three mutually perpendicular directions. The lever holds members to be inserted in the base and comprises mirrors to determine positions of the lever and the members in three dimensions with the use of measuring station.
EFFECT: increased accuracy and speed of insertion device arrangement on the base, simplified usage and reduced cost.
11 cl, 5 dwg