A method for replacing sleepers at a station platform of a heavy repair train

Abstract

The present application provides a kind of overhaul train station platform replacement sleeper construction method, comprising the following steps: marshalling before skylight lockout to construction train;Overhaul train enters platform and is in position at cut-in mouth;Overhaul train uses platform replacement sleeper construction method and carries out cut-in operation;Overhaul train replaces old sleeper with new sleeper in construction section, first carries out rail air connection, then puts power ballast plow construction;Overhaul train cut-out operation;Restoring line fastening, tamping and fine machine unit restores line quality.The present application is suitable for replacement sleeper construction of overhaul train at station platform, can reduce 150mm operation limit, so as to ensure that there is enough space on platform side to pass through operation device and accommodate operator to operate, successfully solve the problem of insufficient construction limit at station platform, save the time of locking skylight point, can be constructed within 210min of diagram overhaul construction skylight, maximumly reduce the influence on transportation.

Description

Technical Field

[0001] This invention belongs to the field of construction technology, and specifically relates to a method for replacing sleepers at the platform of a train undergoing major repairs. Background Technology

[0002] With the development of railways towards higher speeds and heavier equipment, the use of large track maintenance machinery to carry out comprehensive maintenance of railway lines during integrated "maintenance windows" not only meets the requirements of the leapfrog development of railways, but also has increasingly obvious advantages in various aspects such as reducing the labor intensity of people, reducing the interference of construction on transportation, improving maintenance quality, and speeding up maintenance.

[0003] The overhaul train, developed over many years in the field of railway track overhaul, is the world's most advanced large-scale mechanical equipment for rail and sleeper replacement. It integrates multiple disciplines such as mechanics, electrical engineering, hydraulics, measurement, and control, and is a technology-intensive major engineering equipment specifically designed for railway rail and sleeper replacement. It can quickly begin work, completing multiple processes such as rail and sleeper replacement simultaneously, efficiently and with high quality replicating and upgrading the track. It boasts advantages such as fast excavation speed, high quality, low labor intensity for personnel, high safety, and minimal impact on the original track condition.

[0004] However, during use, we also encountered many technical challenges in replacing sleepers at station platforms using overhaul trains: 1. The time limit for overhaul train operations is 700mm above the outer edge of the existing sleeper's top surface, 300mm below the outer edge of the sleeper's bottom surface, and 200mm below the sleeper's bottom surface. Figure 1As shown; however, the distance from the side of the station platform to the end of the sleeper is generally about 575mm, and the platform height is more than 300mm higher than the top surface of the rail. The construction space at the platform cannot meet the clearance requirements for sleeper replacement during overhaul. The No. 5 clamp controls the rail deflection to ensure that the rails are kept within the construction clearance during the connection of the front and rear rails at the cutting point and during sleeper replacement. When the overhaul train cuts in, the No. 5 clamp cannot open outwards sufficiently to ensure the lowering of the power ballast plow, and there is no space for personnel to operate when the rails are connected in the air. Therefore, sleeper replacement at the station platform requires the tamping unit to first perform track realignment operations to move the track at the platform to meet the clearance requirements for sleeper replacement during overhaul. 2. The construction operation requires a long closure time, generally requiring a track closure window of no less than 330 minutes, while the transportation department generally arranges a track closure window of 210 minutes, which has a significant impact on transportation. 3. There is a large pressure on shunting operations. After the track closure work begins, the tamping machine needs to be shunted to the front of the overhaul train to perform track realignment at the platform. After realignment, it is shunted back to the rear of the overhaul train to return the track to its original position before tamping and finishing work is carried out. The operation procedure is complex. 4. Operational safety is difficult to control. Track realignment by tamping machine generally requires shifting the track by more than 200mm to meet the construction clearance requirements. After realignment, the track may have problems such as incorrect direction and unevenness in the front and rear sections. It is necessary to strictly check and confirm the access conditions for subsequent overhaul trains, and it also increases the difficulty of tamping and finishing work after sleeper replacement.

[0005] When using overhaul trains for construction at station platforms, the conventional method of first laying a power ballast plow and then connecting the rails overhead will require track realignment work due to the construction clearance at the station platform. Figure 2 As shown, after the sleeper replacement is completed, the track needs to be returned to its original position. This results in a complex construction plan, long track closure time, difficulty in ensuring construction safety, and significant impact on transportation. The fundamental reason for the complexity, long track closure time, difficulty in ensuring construction safety, and significant impact on transportation caused by using overhauled trains for sleeper replacement at station platforms is the issue of work clearance at the platform. Therefore, solving the work clearance problem at the platform and exploring new methods for sleeper replacement construction using overhauled trains at station platforms is an urgent problem to be solved. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides a method for replacing sleepers at the station platform of a train undergoing major repairs. This method is applicable to replacing sleepers at the station platform of a train undergoing major repairs, saving time during the track closure window. The repair can be carried out within the scheduled 210-minute track closure window, minimizing the impact on transportation.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] This invention provides a method for replacing sleeper jacks at train station platforms during major overhauls, the method comprising the following steps:

[0009] Step S1: Group the construction vehicle train before the sunroof is closed;

[0010] Step S2: After the order to close the skylight is issued, the locomotive pulls the construction train into the closed section. After the construction train arrives at the parking point in front of the construction section, it runs to the cutting point at the platform to prepare for cutting operation. The cutting point is formed by sawing the left and right rails.

[0011] Step S3: The overhaul train performs the cutting operation, using the No. 5 clamp and other clamps of the overhaul train to lift the rail; after the overhaul train lowers the running track, the overhaul train's sleeper grabbing mechanism grabs 4 old sleepers to make room for the down of the power ballast plow and the work trolley.

[0012] The overhaul train is equipped with a set of clamps on each side. Each set of clamps includes a No. 5 clamp and several other clamps. The No. 5 clamp and other clamps on the side closer to the station platform are arranged in an arc that curves towards the station platform. This set of clamps lifts the front and rear rails on the side closer to the station platform. The No. 5 clamp in this set is located in the middle of the arc and is closest to the station platform. The No. 5 clamp and other clamps on the side farther from the station platform are arranged in an arc that curves away from the station platform. This set of clamps lifts the front and rear rails on the side farther from the platform. The No. 5 clamp in this set is located in the middle of the arc and is the outermost.

[0013] Step S4: First, retract the No. 5 clamps and other clamps on both sides of the overhaul train to bring the left and right rails closer to the track center, allowing the rear rail to connect with the front rail in the air with minimal deflection. After the rails are connected, retract the outer clamp of the No. 5 clamp near the platform. Then, the inner clamp of the No. 5 clamp near the platform and other clamps on that side push one rail outward, while the No. 5 clamp and other clamps away from the platform push another rail outward. Then, lower the power ballast plow and the work trolley to perform the sleeper replacement operation. Because the outer clamp of the No. 5 clamp near the platform is retracted, the overhaul train's working clearance can be reduced by 150mm.

[0014] Step S5: The overhaul train arrives at the cutting point and begins the cutting operation.

[0015] Step S6: Restore the line fasteners and use the tamping and finishing unit to restore the line quality and ensure that the line quality in the construction area meets the conditions for opening.

[0016] Step S7: After all the construction vehicles have arrived at the station, the line will be opened.

[0017] Preferably, in step S4, the inner clamp of clamp No. 5, which is closer to the station platform, pushes the rail outward. If the rail comes into contact with the station platform, the station platform temporarily acts as the outer clamp of clamp No. 5, i.e., a protective function.

[0018] As a preferred option, in step S1, the train is grouped according to the normal train formation for sleeper replacement. After the formation is completed, the train is arranged in the following order in the working direction: 1 locomotive, 1 isolation car, 1 empty dedicated sleeper flatbed car, N new sleeper dedicated sleeper flatbed cars, 1 overhaul train, 1 new fastener car, 1 shaping car, 2 tamping cars, and 1 stabilizing car.

[0019] Preferably, in step S2, after the construction train arrives at the parking point before the construction site, it runs at a speed not exceeding 5 km / h to the platform where it cuts into the sluice gate.

[0020] As a preferred method, after the rail is cut, bolt holes need to be drilled at both ends of the rail at the cut-in point, and clamps should be installed to temporarily connect the rails; when the overhaul train arrives at the cut-in point and the cutting operation is to be carried out, the clamps at the rail cutting point should be loosened.

[0021] As a preferred method, the cut-out is formed by sawing the left and right rails. Before the overhaul train arrives at the cut-out position, a clamp is installed at the sawed rail of the cut-out to temporarily connect the rails. When the overhaul train arrives at the cut-out position, the clamp at the sawed rail of the cut-out is loosened, and the overhaul train performs the cutting operation.

[0022] The present invention has the following beneficial effects:

[0023] Compared with the conventional construction method of using tamping units for track realignment and first deploying a power ballast plow before connecting the rails overhead, the present invention has the following advantages and effects:

[0024] This invention provides a method for replacing sleeper ties at station platforms during major overhauls. It improves upon the traditional method of track realignment for sleeper replacement at station platforms. By analyzing the placement sequence and variability of various working devices on the overhaul train and carefully deduce each working process, it breaks with conventional operating procedures and develops a new method that involves first connecting the rails overhead before placing the power ballast plow when the overhaul train enters the station. This effectively eliminates the need for track realignment before and after sleeper replacement at the platform, reduces the need for shunting and track switching, and allows the sleeper replacement task to be completed at the platform without increasing the closure time, minimizing the impact on transportation.

[0025] This invention utilizes a major overhaul train for sleeper replacement at station platforms, successfully solving the problem of insufficient construction clearance at station platforms. It saves on sleeper replacement windows, meets the current 210-minute major overhaul window requirement, minimizes the impact on transportation, and explores a practical and feasible construction process for sleeper replacement projects at station platforms with insufficient clearance. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.

[0027] Figure 1 This is a schematic diagram of the work clearances during major train overhaul construction;

[0028] Figure 2 This is a schematic diagram after the conventional method of track realignment is used;

[0029] Figure 3 This is a schematic diagram of the line at the platform in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the rails during sleeper replacement at the station platform of a train undergoing major repairs, as described in this embodiment of the invention:

[0031] Figure 5 This is a flowchart of the sleeper replacement process at the station platform of a train undergoing major repairs, according to an embodiment of the present invention.

[0032] Figure 6 This is a schematic diagram of the sleeper replacement train formation during major repairs, as described in this embodiment of the invention.

[0033] Figure 7 This is a schematic diagram of the planar shape formed after grabbing four old railway sleepers in an embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of clamp No. 5 on the overhaul train in an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Outer clamp; 2. Inner clamp; 3. Idler roller; 4. Rail; 5. Sleeper. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] This invention significantly shortens the construction window time through optimization of the construction plan and improvement and innovation of the construction method. It completes the sleeper replacement construction at the station platform within the specified drawing window, avoids the drawbacks of using tamping units to realign the track, reduces the impact on transportation, and greatly improves transportation capacity.

[0039] Example

[0040] Construction equipment: DXC-500 overhaul train, manufactured by Jinying Heavy Engineering Machinery Co., Ltd.

[0041] This embodiment provides a method for replacing sleeper jacks at the platform of a train undergoing major repairs, such as... Figures 3 to 8 As shown, the method includes the following steps:

[0042] Step S1: Before using the overhaul train for construction at a certain station platform, the train is assembled according to the normal train formation for sleeper replacement. After assembly, the sequence in the work direction is: 1 locomotive + 1 isolation car + 1 empty dedicated sleeper flatcar + N new sleeper dedicated sleeper flatcars + 1 overhaul train + 1 new fastener car + 1 shaping car + 2 tamping cars + 1 stabilizing car. Figure 6 As shown.

[0043] Step S2: After the track closure order is issued, the locomotive pulls the construction train into the closed section. After the construction train reaches the parking point before the construction section, it runs at a speed not exceeding 5 km / h to the cutting-in point at the platform, ready for the cutting operation. The cutting-in point is formed by sawing the left and right rails. After sawing the rails, bolt holes need to be drilled in the rails at both ends of the cutting-in point, and clamps need to be installed to temporarily connect the rails 4.

[0044] Step S3: When the overhaul train reaches the cutting point, the clamps at the rail sawing section are released, and the overhaul train begins the cutting operation. Using the No. 5 clamp and other clamps, the rail 4 is lifted. The overhaul train lowers its track, and its sleeper-grabbing mechanism grabs four old sleepers 5, creating a flat surface to allow space for the placement of the powered ballast plow and the work trolley. Figure 7 As shown.

[0045] The overhaul train is equipped with a set of clamps on each side. Each set of clamps includes a No. 5 clamp and several other clamps. The No. 5 clamp and other clamps on the side closer to the station platform are arranged in an arc that curves towards the station platform. This set of clamps lifts the front and rear rails on the side closer to the station platform. The No. 5 clamp in this set is located in the middle of the arc and is closest to the station platform. The No. 5 clamp and other clamps on the side farther from the station platform are arranged in an arc that curves away from the station platform. This set of clamps lifts the front and rear rails on the side farther from the platform. The No. 5 clamp in this set is located in the middle of the arc and is the outermost. The distance from the No. 5 clamp to the outer edge of the sleeper above the top surface is the maximum clearance distance of the overhaul train.

[0046] Step S4: At this point, since the powered ballast plow and working trolley have not been lowered (the conventional practice is to lower the powered ballast plow and working trolley first, which would require the left and right No. 5 clamps to be expanded as much as possible to create a large deflection when connecting the front and rear rails at the cut-in point to avoid the rails colliding with the powered ballast plow and working trolley), the operator first retracts the No. 5 clamps and other clamps on both sides of the overhaul train, causing the left and right rails to converge towards the center of the track, allowing the rear rail to connect with the front rail with a small deflection. After the rails are connected, the outer clamp 1 of the No. 5 clamp near the platform is retracted. Then, the inner clamp 2 of the No. 5 clamp near the platform and other clamps on that side extend outward to support a rail 4. If this rail 4 contacts the station platform, the station platform temporarily supports the outer clamp 1 of the No. 5 clamp. The function is protective; the No. 5 clamp and other clamps on the side of the overhaul train away from the station support another rail 4 (the No. 5 clamps on both sides control the deflection of rail 4, ensuring sufficient space to lower the power ballast plow and working trolley). Then, the power ballast plow and working trolley are lowered for sleeper replacement. During sleeper replacement, the overhaul train's sleeper-grabbing mechanism grabs the old sleeper while the sleeper-laying mechanism lays the new sleeper. This new construction method reduces the overhaul train's working clearance by 150mm, meaning the clearance can reach 550mm above the outer edge of the sleeper's top surface. The distance from the existing station platform to the outer edge of the sleeper end is no more than 575mm. Therefore, it can meet the current sleeper replacement requirements of overhaul trains at existing station platforms, ensuring sufficient space on the platform side for the working equipment and personnel. A schematic diagram of the No. 5 clamp on the overhaul train is shown below. Figure 8 As shown.

[0047] Step S5: The overhaul train arrives at the cut-out point and loosens the clamps at the rail sawing section to begin the cutting operation. After the cutting operation is completed, ground personnel restore the track fasteners, and the shaping machine, tamping machine, and stabilizing machine (collectively referred to as the tamping and finishing unit) perform finishing operations to restore the track quality and ensure that the track quality in the construction section meets the conditions for opening.

[0048] Step S6: After all the construction vehicles have arrived at the station, the line will be opened.

[0049] The idler roller 3 is also divided into inner and outer parts, which are connected to the inner and outer clamps of clamp 5. Its main function is to prevent the rail from sliding down after entering the clamp. It does not play a substantial role in this method and is only a part of the structure of clamp 5 itself.

[0050] This method involves replacing sleepers on overhauled trains at the station platform without requiring track realignment. The construction flowchart is as follows: Figure 4 As shown.

[0051] The above describes the practical application of the present invention. The present invention is applicable to the 210-minute track maintenance window on railway tracks. It does not require applying to the transportation department to extend the track maintenance window when formulating a sleeper replacement plan at the station platform. It has obvious advantages over the track realignment plan (see Table 1) and minimizes the impact on transportation.

[0052] Table 1. Results of the advantages of the new construction method

[0053]

[0054]

[0055] The embodiments of the present invention have been described in detail above through examples, but the content described is only an exemplary embodiment of the present invention and should not be considered as limiting the scope of implementation of the present invention. The protection scope of the present invention is defined by the claims. Any technical solutions designed by those skilled in the art using the technical solutions described in the embodiments of the present invention, or designed by those skilled in the art under the inspiration of the technical solutions of the embodiments of the present invention, within the substance and protection scope of the present invention, to achieve the above-mentioned technical effects, or any equivalent changes and improvements made to the scope of the application, should still fall within the patent protection scope of the present invention.

Claims

1. A method for replacing sleeper jacks at a train station platform during major overhauls, characterized in that, The method includes the following steps: Step S1: Group the construction vehicle train before the sunroof is closed; Step S2: After the order to close the skylight is issued, the locomotive pulls the construction train into the closed section. After the construction train arrives at the parking point in front of the construction section, it runs to the cutting point at the platform to prepare for cutting operation. The cutting point is formed by sawing the left and right rails. Step S3: The overhaul train performs the cutting operation, using the No. 5 clamp and other clamps of the overhaul train to lift the rail; after the overhaul train lowers the running track, the overhaul train's sleeper grabbing mechanism grabs 4 old sleepers to make room for the down of the power ballast plow and the work trolley. The overhaul train is equipped with a set of clamps on each side. Each set of clamps includes a No. 5 clamp and several other clamps. The No. 5 clamp and other clamps on the side closer to the station platform are arranged in an arc that curves towards the station platform. This set of clamps lifts the front and rear rails on the side closer to the station platform. The No. 5 clamp in this set is located in the middle of the arc and is closest to the station platform. The No. 5 clamp and other clamps on the side farther from the station platform are arranged in an arc that curves away from the station platform. This set of clamps lifts the front and rear rails on the side farther from the platform. The No. 5 clamp in this set is located in the middle of the arc and is the outermost. Step S4: First, retract the No. 5 clamps and other clamps on both sides of the overhaul train to bring the left and right rails closer to the track center, allowing the rear rail to connect with the front rail in the air with minimal deflection. After the rails are connected, retract the outer clamp of the No. 5 clamp near the platform. Then, the inner clamp of the No. 5 clamp near the platform and other clamps on that side push one rail outward, while the No. 5 clamp and other clamps away from the platform push another rail outward. Then, lower the power ballast plow and the work trolley to perform the sleeper replacement operation. Because the outer clamp of the No. 5 clamp near the platform is retracted, the overhaul train's working clearance can be reduced by 150mm. Step S5: The overhaul train arrives at the cutting point and begins the cutting operation. Step S6: Restore the line fasteners and use the tamping and finishing unit to restore the line quality and ensure that the line quality in the construction area meets the conditions for opening. Step S7: After all the construction vehicles have arrived at the station, the line will be opened.

2. The method for replacing sleepers at the platform of a train undergoing major repairs according to claim 1, characterized in that, In step S4, the inner clamp of clamp No. 5, which is closer to the station platform, pushes the rail outward. If the rail comes into contact with the station platform, the station platform temporarily acts as the outer clamp of clamp No.

5.

3. The method for replacing sleepers at the platform of a train undergoing major repairs according to claim 1, characterized in that, In step S1, the sleeper replacement work train is grouped normally. After the grouping is completed, the sequence in the working direction is 1 locomotive, 1 isolation car, 1 empty dedicated sleeper flatbed car, N new sleeper dedicated sleeper flatbed cars, 1 overhaul train, 1 new fastener car, 1 shaping car, 2 tamping cars, and 1 stabilizing car.

4. The method for replacing sleeper jacks at the platform of a train undergoing major repairs according to claim 1, characterized in that, In step S2, after the construction train arrives at the parking point before the construction site, it runs at a speed not exceeding 5 km / h to the platform where it cuts into the sluice gate.

5. The method for replacing sleepers at the platform of a train undergoing major repairs according to claim 1, characterized in that, After the rails are cut, bolt holes need to be drilled at both ends of the rails at the cut-in point, and clamps need to be installed to temporarily connect the rails; when the overhaul train arrives at the cut-in point, the clamps at the cut-in point rails are loosened.

6. The method for replacing sleeper jacks at the platform of a train undergoing major repairs according to claim 1, characterized in that, The cut-out is formed by sawing the left and right rails. Before the overhaul train arrives at the cut-out position, a clamp is installed at the sawed rail of the cut-out to temporarily connect the rails. When the overhaul train arrives at the cut-out position, the clamp at the sawed rail of the cut-out is loosened, and the overhaul train carries out the cutting operation.

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