RU2822565C1 - Device for installation of continuous welded track rails unloaded inside track in design temperature range of fixation at replacement of inventory rails by them - Google Patents

Abstract

FIELD: transportation.

SUBSTANCE: invention relates to means of laying long-length continuous welded track rails unloaded inside the track, instead of inventory rails, with setting them to design temperature range of fixation. Device consists of two bogies moving along the track, connected to each other and to the traction unit. Each of the trolleys contains support and anti-edging rollers. One of the bogies is intended for shifting inventory rails inside the track. Other bogie is designed to lift the strings unloaded inside the track and slide them onto the under-rail base. Bogie (3), designed for lifting strings unloaded inside the track, and sliding them onto the under-rail base, contains lifting crossbar (9), on which support rollers (7) are mounted and which is installed in vertical guides (14) with possibility of lifting and lowering by means of hydraulic cylinders (15) located in pairs in the longitudinal direction relative to the path, wherein said bogie (3) frame accommodates system coupled with temperature transducer interacting with rail to control hydraulic cylinders.

EFFECT: increasing the stability of the position of the support rollers of the bogie, designed for lifting rails unloaded inside the track, and sliding them onto the under-rail base.

3 cl, 6 dwg

Description

The invention relates to the field of mechanization of track facilities of railway transport and can be used when laying long rail strands of a continuous track, unloaded inside the track, instead of inventory rails with their simultaneous placement in the design fastening temperature range.

When carrying out track work associated with laying a continuous track, first a link track with inventory rails connected by overlays is laid, then rail strands, usually 800 m long, are unloaded into the track, and, after a certain run-in, the inventory rails are replaced with rail strands. Considering that these works are carried out at any time of the year and day, that is, at different temperatures, the laid lashes must be brought into the design temperature range required for the given area. These works are carried out mainly with the additional presentation of the technological “window”.

The following technical solutions are known from the prior art.

A device is known that contains carts used in the method of replacing inventory rails with strands of a continuous track while simultaneously introducing the rail strands into the optimal fastening temperature range by heating the rail strands unloaded inside the track using a high-frequency induction installation with simultaneous replacement of inventory rails with strands of a seamless track. The carts are moved sequentially by a motor platform. A machine for heating rail strands (MNRP) moving in front of the bogies ensures heating of the strands unloaded into the middle of the track using a high-frequency induction installation (magazine “Track and Track Management”, No. 2, 2012, p. 13). The strands of the continuous track are pre-loaded into the track. Currently, four-wheeled carts are used that move along a rail track, each of which contains a frame with support and anti-edging rollers installed on it, one of which is designed to move the inventory rails inside the track, and the other is designed to lift the lashes inside the track and slide them onto the under-rail base . Replacement is carried out as follows. To a traction unit, for example an MTD motor platform, two trolleys are connected in series with a cable. The first of them moves along inventory rails and has on its frame support and anti-edging rollers, on which the raised lashes of the continuous track are placed. As the trolley moves, the whip is sequentially pulled out from the middle of the track and placed on the rail pads. The second cart, the frame of which is equipped with support and anti-edging rollers for placing inventory rails, moves along the pulled-up lashes. When the trolley moves, the inventory rails are shifted inside the track.

The disadvantages of the device used in this method, which provides operations to bring the length of the string in accordance with the required one at the optimal temperature range for laying and directly laying on the under-rail base, are high operating costs for maintaining the track, due to excessive energy costs spent on heating the strings, since the work required directly for elongation is only hundredths of a percent of the work for heating. A device is known that is used in the method of replacing inventory rails on the strands of a continuous track (RF patent No. 2450096 C1, IPC E01B 29/17 “Method of replacing inventory rails on the strands of a continuous continuous track with their simultaneous placement in the design fastening temperature range”), consisting of operations unfastening along the length of the inventory rails, lifting them and moving them inside the track, operations for lifting the lashes inside the track and sliding them onto under-rail pads, the inventory rails and lashes are raised to different levels by grips placed on the frame, hinged at the end of the platform of the track-laying crane and connected to lifting device of the crane, the inventory rails are shifted inside the track using electromagnetic grippers, and each strand is picked up under the rail head, lifted above the inventory rails raised above the fastenings by grippers with anti-edging rollers, while each strand is lifted in the vertical plane by a calculated amount, based on the difference between the temperature of the unloaded lash and the calculated fastening temperature range, move the crane along the lash to its end, secure the lash behind the tap, lower the lash, changed in length by the amount of elongation of the entire lash.

The use of this device ensures a reduction in operating costs for track maintenance by eliminating the use of a machine for heating rail strands, for example, MPRP, and, therefore, eliminating the energy costs spent on heating the strands when carrying out work on installing rail strands of a continuous track, unloaded inside the track, in calculated fastening temperature range when replacing inventory rails with them.

The disadvantages of this device include the difficulty in manufacturing a special frame with grippers, as well as the greater difficulty of getting the base of the rail onto the pads of the under-rail base in curved sections of the track.

The closest analogue of the patented solution is a device known from patent application RU 2013137302 A, published on 02/20/2015, for placing rail lashes of a continuous track, unloaded inside the track, in the calculated fastening temperature range when replacing inventory rails with them, consisting of two movable ones along the rail track of four-wheeled carts, each of which contains a frame with support and anti-edging rollers installed on it, one of which is designed to move the inventory rails inside the track, and the other is designed to lift the lashes unloaded inside the track and slide them onto the under-rail base, while the carts connected to each other and to the traction unit, in turn, the frame of the trolley, designed for lifting the lashes inside the track and sliding them onto the under-rail base, is installed on rotary racks, and its wheels are fixed to the free ends of these racks; in addition, the rotary racks are connected in pairs in the longitudinal direction relative to the path with lanyards to make it possible to change the height of the position of the support rollers by the calculated value, based on the difference between the temperature of the unloaded string and the calculated fastening temperature range.

The disadvantage of this device is the unstable position of the support rollers of the trolley frame, designed to lift the lashes inside the track and slide them onto the under-rail base, due to the possibility of the frame being skewed in the system of its articulated connection with the rotary posts when they rotate asynchronously while changing the height of the support rollers.

The technical problem of the proposed device is to overcome the disadvantages inherent in analogues, as well as to increase the durability and reliability of the proposed trolley while reducing operating costs for track maintenance by eliminating the use of a machine for heating rail strands and, therefore, eliminating the energy costs spent on heating the strands during work. on setting the rail strands of a continuous track, unloaded inside the track, within the calculated fastening temperature range when replacing inventory rails with them.

The technical result of the proposed device is to increase the stability of the position of the support rollers of the trolley, designed to lift the lashes unloaded inside the track and slide them onto the under-rail base.

The technical result is achieved due to the design of a device for placing rail strands of a continuous track, unloaded inside the track, at the design fastening temperature when replacing inventory rails with them, containing two carts movable along the rail track, each of which contains support and anti-edging rollers, one of the carts is designed for sliding the inventory rails inside the track, and the other is designed to lift the strands unloaded inside the track and slide them onto the under-rail base, while the bogies are connected to each other and to the traction unit. According to the invention, the support rollers of the trolley, intended for lifting lashes unloaded inside the track, and sliding them onto the under-rail base, are mounted on a lifting crossbeam installed in vertical guides with the possibility of lifting and lowering by means of hydraulic cylinders located in pairs in the longitudinal direction relative to the track, while the control hydraulic cylinders are produced from a hydraulic system located on the trolley, using a tracking system that receives a signal from a temperature sensor located on the trolley and constantly interacting with the rail.

Installation of the lifting traverse of the trolley, intended for lifting the lashes inside the track and sliding them onto the under-rail base, in vertical guides with the possibility of lifting and lowering by means of hydraulic cylinders located in pairs in the longitudinal direction relative to the track, provides the possibility of reliably changing the height of the position of the support rollers by the calculated value, based on the difference between the temperature of the unloaded strand and the calculated fastening temperature range, which, in turn, causes the creation of a rail wave in each strand lying on the support rollers, that is, bending of the rail strand, while the tensile forces arising when lifting the strand in the vertical plane, ensure its stretching. Installation of a lifting crossbeam in the vertical guides in the inventive design of the device increases the stability of the position of the support rollers of the trolley.

In addition, the use of the proposed device makes it possible to lengthen the string directly during the process of replacing inventory rails without the use of energy-intensive heating operations with increasing the stable position of the support rollers of the trolley, designed for lifting the strings inside the track and sliding them onto the under-rail base. The use of this device ensures a reduction in operating costs for maintaining the track by eliminating the use of a machine for heating rail strands, and, therefore, eliminating the energy costs for heating the strands when carrying out work on setting up rail strands of a continuous track, unloaded inside the track, in the design fastening temperature range at replacing inventory rails with them. In a particular case of implementation of the invention, the temperature sensor can be installed on the trolley in the area of its contact with the rail.

Each cart can be made with four wheels. The solution is further explained by reference to the figures, which show the following.

In fig. 1 - shows a diagram of the relative arrangement of inventory rails and strands of a continuous continuous track when replacing them, as well as the relative arrangement of bogies, their connections between each other and the traction unit;

In fig. 2 - top view of FIG. 1;

in fig. 3 - shows a trolley designed to move inventory rails inside the track;

in fig. 4 - shows a trolley designed for lifting lashes unloaded inside the track and sliding them onto the under-rail base;

in fig. 5 is a side view of FIG. 4;

in fig. 6 - shows a trolley designed for lifting lashes inside the track and sliding them onto the under-rail base, with support rollers in a changed position in height.

In a particular case of implementation of the invention, the claimed device for placing rail strands 1 of a continuous track, unloaded inside the track, into the design fastening temperature range when replacing inventory rails 2 with them, consists of two four-wheeled carts 3 and 4 movable along the rail track. Carts 3 and 4 are interconnected cable 5 of a given length and with a traction unit cable 6 (Fig. 1, 2). The four-wheeled cart 3 (Fig. 4) has height-adjustable support rollers 7 and anti-edging rollers 8, installed on a lifting crossbeam 9, and is designed to lift lashes 1 unloaded inside the track and slide them onto the under-rail base. The four-wheeled cart 4 (Fig. 3) has support rollers 10, anti-edging rollers 11 mounted on the frame 12, and is designed to move the inventory rails 2 inside the track. On the left in the diagram (Fig. 1, 2) rails 13 of the adjacent track are shown. The lifting beam 9 of the four-wheeled cart 3 is installed in vertical guides 14. The lifting beam 9 with support rollers 7 is raised and lowered by means of hydraulic cylinders 15 arranged in pairs in the longitudinal direction relative to the path (Fig. 4, 5, 6). The hydraulic cylinders are controlled from the hydraulic system 16, located on the trolley 3, using a tracking system that receives a signal from a temperature sensor also located on the trolley in the area of contact of the trolley with the rail and constantly interacting with the rail.

The installation of rail strands of a continuous track, unloaded inside the track, in the calculated fastening temperature range when replacing inventory rails with them using the proposed device is carried out as follows.

The four-wheeled cart 3 is installed on the inventory rails 2 in close proximity to the junction of the rails 13 of the adjacent track and is attached with a cable 6 to a traction unit, for example, a motor platform (not shown in Figs. 1 and 2).

The support rollers 7, located on the lifting crossbeam 9 of the cart 3, are lowered in the vertical plane to the minimum value “h _min ” (Fig. 6), the ends of the lashes 1 (previously unloaded and located inside the track) are placed on them and the cart 3 is then moved.

When moving the cart 3, the rail lashes 1 are lowered under their own weight onto the under-rail base, where the ends of the inventory rails 2 are disconnected from the joint of the rails 13 of the adjacent track and the ends of the strands 1 are attached to the joint of the rails 13 of the adjacent track. Then the four-wheeled cart 4 is installed on the rails 1 in the immediate vicinity of the joint of the rails 13 and the free ends of the inventory rails 2 are placed on the support rollers 10 of the cart 4 to move them inside the track.

Then the four-wheeled trolley 4 is shifted towards the trolley 3 at a given distance “a”. The trolley 4 is connected to the trolley 3 by a cable 5 of a given length, and the connected trolleys 3 and 4 are jointly moved using a motor platform to a given distance.

Thus, in each lash 1 a rail wave is created, pinched at the point where the wheels of the cart 4 are located (Fig. 1). The lash 1 in the area of the wave is stretched, while the degree of stretching, that is, the tensile forces arising when lifting the lash 1 in the vertical plane, completely depends on the lifting height “h” of the support rollers 7 of the four-wheeled cart 3. The choice of the lifting height of the support rollers 7 is made by a servo system so that, with the accepted (calculated) length of the cable 5, the voltage in the string 1 corresponds to the voltage of the difference between the temperature of the unloaded string and the calculated fastening temperature range.

The rail temperature sensor monitors its current value _Tf and, using a tracking system, controls the hydraulic cylinders to select the required lifting height “h” of the support rollers 7.

The required value of the lifting height “h” is determined based on the following assumptions: when lifting the lash in a vertical plane to a height “h”, taking into account the pinching of this wave from the lifting point at size “a”, a curve is obtained determined by the formula

,

where χ, γ are the coordinates of the rail wave at any point.

In accordance with the formula for determining the length of a curve (for example, I.N. Bronstein, K.L. Semendyaev. Handbook of Mathematics. - M.: Publishing House of Fiz. - Math. Literature. 1962, p. 394), the length of the curve L is determined out of dependence

,

whence the increment per unit length is found in the form

,

where λ is the wave projection length.

The resulting increment value must correspond to the elongation Δ _T obtained when the string is introduced into the design fastening temperature range, which is determined in accordance with the “Technical instructions for the design, laying, maintenance and repair of continuous continuous track”. - M.: Transport, 2000, p. 64, clause 2.2. The temperature increment per unit length is determined from the dependence

,

where α = 0.0000118 - coefficient of linear expansion of rail steel;

T _opt - optimal temperature for laying the lash;

T _f - actual temperature of the rails during work.

It is obvious that the required current height “h” of lifting the whip in the vertical plane for a given size between the carts “a” is determined by the equality Δ _ha = Δ _T.

Thus, the use of the proposed device makes it possible to lengthen the string directly during the process of replacing inventory rails without the use of energy-intensive heating operations.

Claims (3)

1. A device for setting the rail strands of a continuous track, unloaded inside the track, to the design fastening temperature when replacing inventory rails with them, containing two carts movable along the rail track, each of which contains support and anti-edge rollers, one of the carts is designed to move the inventory rails inward track, and the other is designed for lifting lashes unloaded inside the track and sliding them onto the under-rail base, while the carts are connected to each other and to the traction unit, characterized in that the cart designed for lifting lashes unloaded inside the track and sliding them onto under-rail base, contains a lifting traverse on which support rollers are mounted and which is installed in vertical guides with the possibility of lifting and lowering by means of hydraulic cylinders located in pairs in the longitudinal direction relative to the track, while a tracking system is installed on the frame of the said trolley, connected to a temperature sensor interacting with rail, and configured to control hydraulic cylinders. 2. The device according to claim 1, characterized in that the temperature sensor is installed on the trolley in the area of its contact with the rail. 3. The device according to claim 1, characterized in that each trolley is made of four wheels.