A method for optimizing structure and improving performance of a passenger and freight co-linear railway turnout

Abstract

The application provides a method for optimizing and improving a passenger and freight co-line railway turnout structure, which judges an optimization position, distinguishes the optimization position as a steel rail piece, a base plate and a turnout sleeper, a steel rail piece and a base plate, and a steel rail piece, and respectively performs turnout overall optimization, turnout steel base plate optimization and turnout steel rail piece optimization according to each case. The application provides a scientific and systematic solution for the optimization reconstruction and technical upgrading of a 60kg / m steel rail turnout of a passenger and freight co-line railway, improves the on-site service state of the turnout, improves the use performance of the turnout, prolongs the service life of the turnout, and reduces the on-site maintenance and repair workload.

Description

Technical Field

[0001] This invention relates to the field of railways, and in particular to a method for optimizing the structure and improving the performance of turnouts on passenger and freight railways. Background Technology

[0002] Over the past 20 years, my country's railway turnouts have developed two mature technology series in the fields of high-speed and heavy-haul railways, filling gaps in the railway turnout product lineup and meeting the needs of new line construction and upgrading. The number of 60kg / m rail single turnouts laid on my country's passenger and freight railways is enormous, accounting for approximately 52% of the total number of turnouts on the entire railway network. However, the main type of turnouts currently used on passenger and freight railways remains at the technological level developed during the speed-up turnout era of the last century. With the continuous increase in the transport intensity of passenger and freight railways, a series of problems have emerged during use, including insufficient structural strength, short component lifespan, serious damage and defects, frequent maintenance and repairs, and frequent derailment accidents.

[0003] Currently, the overall technical level of turnouts on my country's passenger and freight railways lags far behind that of high-speed and heavy-haul railways. There is an urgent need to optimize, transform, and upgrade the series of turnouts on my country's passenger and freight railways to systematically improve their performance, meet the ever-increasing transportation demands, ensure long-term safe service, and make up for the technical shortcomings of turnouts on my country's passenger and freight railways.

[0004] A method for optimizing the structure and improving the performance of turnouts on railways that serve both passenger and freight lines is needed to solve the above problems. Summary of the Invention

[0005] This invention addresses the problem that the overall technical level of turnouts on my country's passenger and freight railways lags far behind that of high-speed and heavy-haul railway turnouts. It necessitates the optimization, transformation, and overall upgrading of turnouts on my country's passenger and freight railways to systematically improve their performance, meet ever-increasing transportation demands, ensure long-term safe service, and fill the technical gaps in my country's passenger and freight railway turnouts. This invention provides a method for optimizing the structure and improving the performance of passenger and freight railway turnouts, thus solving the aforementioned problems.

[0006] This invention provides a method for optimizing the structure and improving the performance of turnouts on passenger and freight railway lines, comprising the following steps:

[0007] S1. Determine the optimization location. If it is a rail component, pad, or turnout sleeper, proceed to step S2; if it is a rail component and pad, proceed to step S3; if it is a rail component, proceed to step S4.

[0008] S2. Perform overall optimization of the turnout;

[0009] S3. Optimize the steel pads in the turnout;

[0010] S4. Plane the basic rail and thicken the pointed rail, where the preset planing amount of the basic rail is 5mm;

[0011] S5. Determine whether the optimized position includes the turnout sleeper. If yes, proceed to step S8; otherwise, proceed to step S6.

[0012] S6. After planing, determine whether it causes a gap between the basic rail tip rail at the traction point. If so, reduce the planing amount until there is no gap between the basic rail tip rail at the traction point, and then proceed to step S7; otherwise, proceed directly to step S7.

[0013] S7. Determine the basic rail planing amount b, and determine whether the basic rail planing amount b is b≤2mm. If it is, set b=0mm and do not planing. Otherwise, planing is performed, and the planing amount is b.

[0014] S8. Optimization complete.

[0015] The method for optimizing the structure and improving the performance of turnouts on passenger and freight railways according to the present invention, as a preferred embodiment, includes the following specific steps in step S2: Overall optimization of the turnouts.

[0016] The turnout alignment was changed to a semi-tangential alignment with a phase separation, and the phase separation value was optimized.

[0017] The fastener system structure was optimized by replacing the iron base with a pre-embedded iron base, thus achieving the connection between the pad plate and the turnout sleeper.

[0018] Processing of switch rails based on 60AT2 steel rails;

[0019] Increase the length of the lateral guardrails to ≥5m;

[0020] By changing the amount and location of reinforcement in the turnout sleepers, the height difference between the prestressing center and the centroid can be shortened, thus slowing down the creep and arching of the turnout sleepers.

[0021] The method for optimizing the structure and improving the performance of turnouts on passenger and freight railways according to the present invention, as a preferred embodiment, includes the following steps in step S3:

[0022] S31. Determine whether the turnout alignment has been optimized to a semi-tangential alignment. If yes, proceed to step S33; otherwise, proceed to step S32.

[0023] S32. Determine whether there is enough space on the pad to move the iron base. If yes, proceed to step S33; otherwise, proceed to step S34.

[0024] S33. Add a 1:40 rail bottom slope or rail top slope along the entire length of the turnout;

[0025] S34. Determine whether the turnout has been optimized as a whole. If yes, proceed to step S36; otherwise, proceed to step S35.

[0026] S35. Determine if there is still space on the pad to move the iron seat. If so, increase the phase separation value according to the remaining space on the pad to move the iron seat and proceed to step S36. Otherwise, proceed to step S36.

[0027] S36. Increase the thickness of the pad plate and address the resulting increase in rail top surface height in the turnout area;

[0028] S37. Determine whether the turnout has been optimized as a whole. If yes, proceed to step S39; otherwise, proceed to step S38.

[0029] S38. Determine whether the length of the slide plate pad is long enough. If yes, proceed to S39; otherwise, proceed to S310.

[0030] S39. Optimize the slide plate into an elastic clamp slide table, and then proceed to step S311 after the elastic clamp achieves elastic clamping of the basic rail.

[0031] S310. The slide plate is optimized into a spring-loaded slide table with wedge-shaped adjustment blocks, and the spring plates achieve elastic clamping of the basic rail.

[0032] S311. Determine whether the turnout has been optimized as a whole. If yes, proceed to step S313; otherwise, proceed to step S312.

[0033] S312. Determine whether the length of the guard rail pad is long enough. If yes, proceed to step S313; otherwise, proceed to step S314.

[0034] S313. Optimize the guard rail pad into an elastic clamping slide bed, and after the elastic clamp achieves elastic clamping of the basic rail and the length of the guard rail pad is increased, proceed to step S314.

[0035] S314. The guard rail pad is optimized into a spring-loaded slide bed with wedge-shaped adjustment blocks. The spring-loaded pads achieve elastic clamping of the main rail, and the guard rail is manufactured using 50kg / m steel rails.

[0036] The method for optimizing the structure and improving the performance of turnouts on passenger and freight railways according to the present invention, as a preferred embodiment, uses the following method to determine the increase in phase separation value in step S35:

[0037] Based on the maximum allowable movement space of the iron seat, a preset phase separation value increment is determined. If the preset phase separation value increment will cause a gap between the basic rail tip rails at the traction point, the phase separation value increment is reduced until there is no gap between the basic rail tip rails at the traction point. The phase separation value increment s determined under the above two conditions is set to 0 if s≤5mm, and no alignment optimization is performed. If s>5mm, alignment optimization is performed, and the phase separation value increment is s.

[0038] The method for optimizing and improving the structure and performance of turnouts on passenger and freight railways according to the present invention, as a preferred embodiment, involves the following method in step S36 for handling the resulting increase in the rail top surface in the turnout area:

[0039] The rise of the rail top surface in the turnout area shall be ≤2% with the slope, and the track shall be lowered to the track level when connecting with the section track or the turnout area as a whole, so as to eliminate the rise of the rail top surface in the turnout area.

[0040] This method can provide a scientific and systematic solution for the optimization, transformation and technological upgrading of 60kg / m steel turnouts on passenger and freight railways, improve the on-site service condition of the turnouts, enhance their performance, extend their service life, and reduce the amount of on-site maintenance and repair work.

[0041] The beneficial effects of this invention are as follows:

[0042] (1) The improvement of the semi-tangent shape can significantly increase the length of the straight section at the front end of the switch rail, increase the width of the rail head at the semi-tangent point, improve the wear resistance of the switch rail, and at the same time control the tip angle of the switch rail to prevent it from being too large.

[0043] (2) The connection between the pad and the turnout sleeper is realized by pre-embedded iron base, which enhances the stability and reliability of the fastener system and reduces the frequency of damage to the fastener system and the workload of maintenance.

[0044] (3) Optimize the turnout sleeper to ensure strength while shortening the height difference between the prestress center and the centroid, thus slowing down the creep and arching of the turnout sleeper.

[0045] (4) Increase the length of the lateral guard rail to ≥5m, thereby increasing the length of the guard rail buffer section, reducing the angle of attack of the guard rail buffer section, reducing the impact of the wheels on the guard rail, improving the dynamic performance of the vehicle passing through the turnout area, and increasing the service life of the guard rail and related components.

[0046] (5) Increasing the thickness of the pad plate and using a slope of ≤2% to connect the rail top surface of the turnout area with the track section, or carrying out track lowering operations in the turnout area to eliminate the rise of the rail top surface of the turnout area, can improve the strength of the pad plate and reduce the risk of breakage.

[0047] (6) Clear logical judgment relationships can adopt precise optimization schemes according to the actual situation and needs on site, realizing automatic judgment and decision-making. Attached Figure Description

[0048] Figure 1 This is a flowchart of a method for optimizing the structure and improving the performance of turnouts on a passenger and freight railway line. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Example 1

[0050] like Figure 1 As shown, a method for optimizing the structure and improving the performance of turnouts on passenger and freight railway lines includes the following steps:

[0051] S1. Determine the optimization location. If it is a rail component, pad, or turnout sleeper, proceed to step S2; if it is a rail component or pad, proceed to step S3; if it is a rail component, proceed to step S17.

[0052] S2. Perform overall optimization of the turnout;

[0053] S3. Determine whether the turnout alignment has been optimized to a semi-tangential alignment. If yes, proceed to step S5; otherwise, proceed to step S4.

[0054] S4. Determine if there is enough space on the pad to move the iron base. If yes, proceed to step S5; otherwise, proceed to step S6.

[0055] S5. Add a 1:40 rail bottom slope or rail top slope along the entire length of the turnout;

[0056] S6. Determine whether the turnout has been optimized as a whole. If yes, proceed to step S8; otherwise, proceed to step S7.

[0057] S7. Determine if there is still space on the pad to move the iron seat. If so, increase the phase separation value according to the remaining space on the pad to move the iron seat and proceed to step S8. Otherwise, proceed to step S8.

[0058] S8. Increase the thickness of the pad plate and address the resulting increase in rail top surface height in the turnout area;

[0059] S9. Determine whether the turnout has been optimized as a whole. If yes, proceed to step S11; otherwise, proceed to step S10.

[0060] S10. Determine if the length of the slide plate pad is long enough. If yes, proceed to S11; otherwise, proceed to S12.

[0061] S11. Optimize the slide plate into an elastic clamp slide table, and then proceed to step S13 after the elastic clamp achieves elastic clamping of the basic rail.

[0062] S12. The slide plate is optimized into a spring-loaded slide table with wedge-shaped adjustment blocks, and the spring plates achieve elastic clamping of the basic rail.

[0063] S13. Determine whether the turnout has been optimized as a whole. If yes, proceed to step S15; otherwise, proceed to step S14.

[0064] S14. Determine whether the length of the guard rail pad is long enough. If yes, proceed to step S15; otherwise, proceed to step S16.

[0065] S15. Optimize the guard rail pad into an elastic clamp slide table. After the elastic clamp achieves elastic clamping of the basic rail and the length of the guard rail pad is increased, proceed to step S17.

[0066] S16. The guard rail pad is optimized into a spring-loaded slide bed with wedge-shaped adjustment blocks. The spring-loaded pads achieve elastic clamping of the main rail, and the guard rail is manufactured using 50kg / m steel rails.

[0067] S17. Plane the basic rail and thicken the pointed rail, wherein the preset planing amount of the basic rail is 5mm;

[0068] S18. Determine whether the optimized position includes the turnout sleeper. If yes, proceed to step S21; otherwise, proceed to step S19.

[0069] S19. After planing, determine whether it causes a gap between the basic rail tip rails at the traction point. If so, reduce the planing amount until there is no gap between the basic rail tip rails at the traction point, then proceed to step S20; otherwise, proceed directly to step S20.

[0070] S20. Determine the basic rail planing amount b. Determine whether the basic rail planing amount b is b≤2mm. If it is, set b=0mm and do not planing. Otherwise, planing is performed. The planing amount is b.

[0071] S21. Optimization complete.

[0072] The specific principle behind the judgments made in steps S3 to S16 of this embodiment is as follows:

[0073] If there is sufficient space on the rail base plate to move the iron seat, adding a 1:40 rail base slope or rail top slope along the entire length of the turnout can effectively improve the wheel-rail contact relationship in the turnout area and reduce the damage rate of the wheels and rails. If there is insufficient space on the rail base plate, a 1:40 rail base slope is not added. After adding the rail base slope, if there is still space on the rail base plate to move the iron seat, the turnout alignment is optimized according to the remaining iron seat movement space on the rail base plate, increasing the phase separation value, lengthening the straight section at the front end of the curved tip rail, and improving the strength and wear resistance of the curved tip rail. After adding the rail base slope, if there is no space on the rail base plate to move the iron seat, no alignment optimization is performed. Increase the thickness of the rail base plate to improve its strength and reduce the risk of breakage. For guard rail base plates, if the base plate length is sufficient, increase the length of the guard rail base plate to improve the lateral stability and support force of the guard rail. Use 50kg / m steel rails to manufacture the guard rails to improve their lateral stability and anti-overturning ability.

[0074] Preferably, in this embodiment, the method for setting a 1:40 rail bottom slope by matching and optimizing the design of the pad is as follows: the rail bearing groove is set with a 1:40 slope to adjust the position of the iron seat.

[0075] Furthermore, the design of connecting components such as spacers and top rails has been optimized to match the rail components after the 1:40 rail bottom slope has been set.

[0076] Step S2, which involves overall optimization of the turnout, specifically includes:

[0077] The turnout alignment was optimized by adopting a semi-tangential alignment with a phase separation. The phase separation value was optimized by increasing the length of the straight section at the front end of the switch rail, increasing the width of the rail head at the semi-tangential point, improving the wear resistance of the switch rail, and controlling the tip angle of the switch rail to prevent it from becoming too large. The optimization was carried out by taking all factors into consideration.

[0078] The fastening system is optimized by using pre-embedded iron bases to connect the pads and turnout sleepers, thereby enhancing the stability and reliability of the fastening system and reducing the frequency of damage and maintenance workload.

[0079] By processing the switch rails based on 60AT2 steel rails, the bending stiffness of the switch rails is reduced, thereby reducing the traction force during turnout switching.

[0080] The length of the lateral guard rail is increased to ≥5m, thereby increasing the length of the guard rail buffer section, reducing the angle of attack of the guard rail buffer section, mitigating the impact of the wheels on the guard rail, improving the dynamic performance of the vehicle when passing through the turnout area, and increasing the service life of the guard rail and related components.

[0081] The quantity and location of reinforcement in the turnout sleepers were optimized to ensure strength while shortening the height difference between the prestressing center and the centroid, thus mitigating the creep and camber of the turnout sleepers.

[0082] The method for determining the increase in phase separation value in step S7 is as follows:

[0083] Based on the maximum allowable movement space of the iron seat, a preset phase separation value increment is determined. If the preset phase separation value increment will cause a gap between the basic rail tip rails at the traction point, the phase separation value increment is reduced until there is no gap between the basic rail tip rails at the traction point. The phase separation value increment s determined under the above two conditions is set to 0 if s≤5mm, and no alignment optimization is performed. If s>5mm, alignment optimization is performed, and the phase separation value increment is s.

[0084] The method for handling the rise in rail top surface in the turnout area caused by step S8 is as follows:

[0085] The rise of the rail top surface in the turnout area shall be ≤2% with the slope, and the track shall be lowered to the track level when connecting with the section track or the turnout area as a whole, so as to eliminate the rise of the rail top surface in the turnout area.

[0086] In this embodiment, steps S17 to S20 are for optimizing the turnout rail components by planing the main rail and thickening the switch rail. The thickness of the switch rail is increased by planing the main rail, thereby improving the strength and wear resistance of its weak front section.

[0087] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for optimizing the structure and improving the performance of turnouts on passenger and freight railway lines, characterized in that: Includes the following steps: S1. Determine the optimization location. If it is a rail component, pad, or turnout sleeper, proceed to step S2; if it is a rail component and pad, proceed to step S3; if it is a rail component, proceed to step S4. S2. Perform overall optimization of the turnout; S3. Optimize the steel pads in the turnout; S4. Plane the basic rail and thicken the pointed rail, where the preset planing amount of the basic rail is 5mm; S5. Determine whether the optimized position includes the turnout sleeper. If yes, proceed to step S8; otherwise, proceed to step S6. S6. After planing, determine whether it causes a gap between the basic rail tip rail at the traction point. If so, reduce the planing amount until there is no gap between the basic rail tip rail at the traction point, and then proceed to step S7; otherwise, proceed directly to step S7. S7. Determine the basic rail planing amount b, and determine whether the basic rail planing amount b is b≤2mm. If it is, set b=0mm and do not planing. Otherwise, planing is performed, and the planing amount is b. S8. Optimization complete; Step S3 specifically includes the following steps: S31. Determine whether the turnout alignment has been optimized to a semi-tangential alignment. If yes, proceed to step S33; otherwise, proceed to step S32. S32. Determine whether there is enough space on the pad to move the iron base. If yes, proceed to step S33; otherwise, proceed to step S34. S33. Add a 1:40 rail bottom slope or rail top slope along the entire length of the turnout; S34. Determine whether the turnout has been optimized as a whole. If yes, proceed to step S36; otherwise, proceed to step S35. S35. Determine if there is still space on the pad to move the iron seat. If so, increase the phase separation value according to the remaining space on the pad to move the iron seat and proceed to step S36. Otherwise, proceed to step S36. S36. Increase the thickness of the pad plate and address the resulting increase in rail top surface height in the turnout area; S37. Determine whether the turnout has been optimized as a whole. If yes, proceed to step S39; otherwise, proceed to step S38. S38. Determine whether the length of the slide plate pad is long enough. If yes, proceed to S39; otherwise, proceed to S310. S39. Optimize the slide plate into an elastic clamp slide table, and then proceed to step S311 after the elastic clamp achieves elastic clamping of the basic rail. S310. The slide plate is optimized into a spring-loaded slide table with wedge-shaped adjustment blocks, and the spring plates achieve elastic clamping of the basic rail. S311. Determine whether the turnout has been optimized as a whole. If yes, proceed to step S313; otherwise, proceed to step S312. S312. Determine whether the length of the guard rail pad is long enough. If yes, proceed to step S313; otherwise, proceed to step S314. S313. Optimize the guard rail pad into an elastic clamping slide bed, and after the elastic clamp achieves elastic clamping of the basic rail and the length of the guard rail pad is increased, proceed to step S314. S314. The guard rail pad is optimized into a spring-loaded slide bed with wedge-shaped adjustment blocks. The spring-loaded pads achieve elastic clamping of the main rail, and the guard rail is manufactured using 50kg / m steel rails.

2. The method for optimizing the structure and improving the performance of turnouts on a passenger-freight mixed railway line according to claim 1, characterized in that: The overall optimization of the turnout in step S2 specifically includes: The turnout alignment was changed to a semi-tangential alignment with a phase separation, and the phase separation value was optimized. The fastener system structure was optimized by replacing the iron base with a pre-embedded iron base, thus achieving the connection between the pad plate and the turnout sleeper. Processing of switch rails based on 60AT2 steel rails; Increase the length of the lateral guardrails to ≥5m; By changing the amount and location of reinforcement in the turnout sleepers, the height difference between the prestressing center and the centroid can be shortened, thus slowing down the creep and arching of the turnout sleepers.

3. The method for optimizing the structure and improving the performance of turnouts on a passenger-freight mixed railway line according to claim 1, characterized in that: The method for determining the increase in phase separation value in step S35 is as follows: Based on the maximum allowable movement space of the iron seat, a preset phase separation value increment is determined. If the preset phase separation value increment will cause a gap between the basic rail tip rails at the traction point, the phase separation value increment is reduced until there is no gap between the basic rail tip rails at the traction point. The phase separation value increment s determined under the two conditions is: if s ≤ 5mm, then s = 0 and no alignment optimization is performed; if s > 5mm, then alignment optimization is performed, and the phase separation value increment is s.

4. The method for optimizing the structure and improving the performance of turnouts on a passenger-freight mixed railway line according to claim 1, characterized in that: The method for handling the rise in rail top surface in the turnout area caused by step S36 is as follows: The rise of the rail top surface in the turnout area shall be ≤2% with the slope, and the track shall be lowered to the track level when connecting with the section track or the turnout area as a whole, so as to eliminate the rise of the rail top surface in the turnout area.

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