A replacement method for elastic pads of high-speed turnout regions of passenger dedicated line series

Abstract

The application discloses a kind of replacement methods for series of high-speed turnout area elastic pad of passenger special line, including collecting high-speed turnout area original static data, obtaining turnout original geometric dimension;Remove electric switch machine;Remove the positioning device of operation area;Loosen the pad bolt and fastener T bolt on the several turnout sleeper before and after the elastic pad to be replaced;Lift the rail in operation area;The elastic pad to be replaced is moved to the turnout sleeper cross position along the longitudinal direction of rail;Remove the elastic pad to be replaced;Install new elastic pad;Reset the lifted rail, install the positioning device removed;Adjust rail, fastener system and pad bolt.The application is used to solve the problem of lack of replacement method for series of high-speed turnout area elastic pad of passenger special line in prior art, to realize the replacement of series of high-speed turnout area elastic pad of passenger special line to provide special method, to provide scientific guidance for on-site replacement operation, to improve the standardization degree of operation and other purposes.

Description

Technical Field

[0001] This invention relates to the field of high-speed railway turnout maintenance technology, specifically to a method for replacing elastic pads in the high-speed turnout area of ​​passenger dedicated lines. Background Technology

[0002] my country's independently developed series of high-speed railway turnouts for passenger dedicated lines, after years of trial testing and continuous optimization, have reached an internationally advanced level in overall technology and are now widely used as the main product in my country's high-speed railway network. The elastic pad in the high-speed turnout area is a key component of the turnout structure, primarily responsible for buffering wheel-rail impacts, attenuating vibration energy, and maintaining the geometric position of the track in the turnout area. Its condition directly affects the stability and operational safety of the high-speed railway turnout area. During long-term service, the elastic pad is susceptible to performance degradation such as elastic decay, plastic deformation, and cracking due to the combined effects of train dynamic loads, environmental factors, and material aging. When the degradation of the elastic pad exceeds the allowable range, it must be replaced promptly to restore the normal service performance of the track structure in the turnout area.

[0003] However, since the installation and operation of turnouts on high-speed passenger dedicated lines, no large-scale systematic replacement of elastic pads has been carried out. Furthermore, the turnouts on high-speed passenger dedicated lines have complex structures and numerous components. The structure and dimensions of the elastic pads vary in different parts of the turnout area, and they have complex assembly relationships with the fastening system, rail components, and other parts. Currently, there is no clear and unified operational plan for how to reasonably and feasiblely complete the replacement of elastic pads in the turnout area of ​​high-speed passenger dedicated lines while ensuring that the various components do not interfere with each other and do not damage the structural integrity.

[0004] In existing technologies, solutions for replacing elastic pads mainly focus on CN-series high-speed turnouts or high-speed railway mainline tracks. Since the elastic pads of CN-series high-speed turnouts do not have specially designed platforms or other structures, and their metal components can be separated and disassembled, the replacement method is relatively clear and uniform. Furthermore, the structure and fastening system of high-speed railway mainline tracks are simpler, making replacement easier. Therefore, in these two existing working conditions, replacement can usually be completed using conventional tools such as pry bars and track lifters, and this approach does not provide guidance for replacing elastic pads on passenger dedicated line high-speed turnouts.

[0005] For high-speed turnouts on passenger dedicated lines, the current railway industry maintenance regulation TG_GW115-2023, "Rules for Maintenance of High-Speed ​​Railway Lines," does not yet specify a concrete procedure for replacing their elastic pads. When on-site maintenance personnel discover damage, deterioration, or excessive stiffness exceeding reasonable limits in the elastic pads of passenger dedicated line turnout areas, affecting train ride smoothness, they can only attempt replacements based on personal experience. Some maintenance units have attempted to replace the pads by gradually removing track sections and partially disassembling the fastener system, but due to the lack of systematic operational guidance, problems such as improper disassembly sequence, installation positioning deviations, and interference between adjacent components easily arise during the operation. This not only affects replacement efficiency but may also cause secondary damage to the existing structure of the turnout area or introduce new safety hazards.

[0006] In summary, the existing technology lacks a systematic and standardized replacement method for elastic pads in the turnout area of ​​high-speed passenger dedicated lines. There is an urgent need to propose a replacement method for elastic pads in the turnout area of ​​high-speed passenger dedicated lines to address the deficiencies in the existing technology and fill the gaps in related research and engineering practice. Summary of the Invention

[0007] This invention provides a method for replacing elastic pads in the turnout area of ​​high-speed passenger dedicated lines, thereby solving the problem of the lack of a replacement method for elastic pads in the turnout area of ​​high-speed passenger dedicated lines in the existing technology. It provides a dedicated method for replacing elastic pads in the turnout area of ​​high-speed passenger dedicated lines, and aims to provide scientific guidance for on-site replacement operations and improve the standardization of operations.

[0008] This invention is achieved through the following technical solution:

[0009] A method for replacing elastic pads in the turnout area of ​​a high-speed passenger dedicated line includes the following steps:

[0010] S1. Collect the original static data of the high-speed turnout area and obtain the original geometric dimensions of the turnout;

[0011] S2. Determine if an electric switch machine exists in the work area: If it exists, remove the electric switch machine;

[0012] S3. Remove the positioning device in the work area; loosen the pad bolts and fastener T-bolts on several fork sleepers before and after the elastic pad to be replaced;

[0013] S4. Lift the rails in the work area using track-lifting equipment;

[0014] S5. Move the elastic pad to be replaced longitudinally forward or backward along the rail to the middle position of the turnout sleeper.

[0015] S6. Remove the elastic pad to be replaced; install a new elastic pad.

[0016] S7. Reset the raised rails and install the removed positioning device;

[0017] S8. Adjust the rails, fastening system, and base plate bolts until the current geometry of the turnout meets the requirements.

[0018] The existing technology for replacing elastic pads in the high-speed turnout area of ​​passenger dedicated lines mainly has the following technical problems:

[0019] 1) Existing replacement schemes are either only applicable to CN series high-speed turnout structures or only applicable to high-speed section track structures, neither of which fully considers the structural complexity of passenger dedicated line series high-speed turnouts, making it difficult to guarantee the reliability and structural safety of the replacement process.

[0020] 2) Existing technology does not fully consider the spatial relationship between the elastic pad and adjacent components and the disassembly and assembly sequence. In actual operation, problems such as improper disassembly sequence of components, installation positioning deviation, and mutual interference between adjacent components are likely to occur. At best, it will affect the replacement efficiency; at worst, it may cause secondary damage to the existing structure of the turnout area or even cause new safety hazards.

[0021] 3) Existing technology lacks a unified operating procedure for replacing elastic pads in the turnout area of ​​high-speed passenger dedicated lines. It lacks full-process guidance from pre-operation preparation, tool selection, disassembly sequence, pad replacement, installation and adjustment to post-operation inspection. It is difficult to meet the needs of standardized and meticulous on-site maintenance and repair, which may cause secondary damage to the existing structure of the turnout area or introduce new safety hazards.

[0022] To overcome the aforementioned technical problems, this application proposes a method for replacing elastic pads in the high-speed turnout area of ​​a passenger dedicated line, optimizing the details and techniques for replacing elastic pads at key locations in the high-speed turnout area. Specifically, this method first involves preparation for replacement, including collecting original static data of the high-speed turnout area and obtaining the original geometric dimensions of the turnout. For areas with electric switch machines, the electric switch machines need to be removed with the cooperation of signal professionals and other relevant personnel. Then, the relevant positioning devices in the work area are removed, and the pad bolts and fastener T-bolts on several turnout sleepers before and after the elastic pad to be replaced are loosened to facilitate the subsequent lifting of the rail. Next, the elastic pad to be replaced is moved longitudinally forward or backward along the rail to the mid-span position of the turnout sleeper. At the mid-span position, the elastic pad to be replaced is removed, and a new elastic pad is installed. Then, the lifted rail is lowered back to its original position, and the previously removed positioning devices are reinstalled. Finally, the rail, fastener system, and pad bolts are adjusted until the current geometric dimensions of the turnout meet the specified requirements.

[0023] This application proposes for the first time a detailed replacement method specifically for elastic pads in the turnout area of ​​high-speed passenger dedicated lines, filling a gap in both theory and engineering practice. This method is simple and convenient to operate, highly practical, and solves the problems of blind construction, low efficiency, and difficulty in ensuring accuracy in the replacement of elastic pads in the turnout area of ​​high-speed passenger dedicated lines in existing technologies, as well as the significant construction difficulties under complex working conditions. It provides full-process guidance for the replacement of elastic pads in the turnout area of ​​high-speed passenger dedicated lines, significantly improving the reliability and structural safety of the replacement process, meeting the needs of standardized and meticulous on-site maintenance, and avoiding secondary damage to existing structures or the introduction of new safety hazards due to inappropriate replacement methods.

[0024] Furthermore, those skilled in the art should understand that the working area in this application refers to the area where the elastic pad to be replaced is located; and the positioning device in this application refers to the relevant components that play a direct or indirect limiting role on the elastic pad.

[0025] Furthermore, the positioning device includes any one or more of the following: pad bolts, T-bolts, support plates, fasteners, and gauge blocks. In actual operation, all existing positioning devices can be removed according to the site conditions.

[0026] Furthermore, in step S4, if the work area is a fixed section of the switch rail with a platform, the rail is lifted by a gantry crane; otherwise, the hydraulic jack is placed in the middle of the adjacent turnout sleeper in front of or behind the elastic pad to be replaced along the longitudinal direction of the rail, and the rail is lifted.

[0027] Furthermore, in step S6, the method for removing the elastic pad to be replaced includes:

[0028] The turnout area is divided into several zones;

[0029] Determine the area of ​​the turnout section where the elastic pad to be replaced belongs;

[0030] Different methods were used to remove the elastic pads from different areas.

[0031] This solution divides the turnout area into several regions based on the difficulty or method of replacing the elastic pads in different areas. Then, it determines the type of the region to be replaced and uses the corresponding method to remove the elastic pads in that region.

[0032] Furthermore, the areas divided into turnout zones include any one or more of the following:

[0033] The areas in front of the switch tip, the guide curve area of ​​the turnout area, the fixed section area of ​​the switch switch without a platform, the movable section area of ​​the switch switch, the fixed section area of ​​the switch switch with a platform, the area in front of the frog tip, the non-clamping section area of ​​the wing rail, the frog guard rail area, the long-distance clamping area of ​​the wing rail, the area at the foot of the fork switch, the short-distance clamping area of ​​the wing rail, the short frog foot section, and the transition area after the turnout in the turnout area.

[0034] In this solution, terms such as switch rail, guide curve, platform, fixed switch rail section, movable switch rail section, frog rail, wing rail, frog, guard rail fork root, etc., are all specialized terms in the field of turnouts and are not difficult for those skilled in the art to understand.

[0035] Furthermore, for the elastic pads belonging to the areas in front of the tip of the switch rail, the guide curve area of ​​the turnout area, the fixed section of the switch rail without a platform, the non-clamping section of the wing rail, or the transition area after the turnout in the turnout area, the following method is used for removal: allow the elastic pad to be replaced to fall freely at the mid-span position of the turnout sleeper, and pull out the elastic pad laterally.

[0036] Within the area defined by this scheme, there are no special designs for the track, pads, or special tongue structures for the pads. Therefore, after moving the elastic pad to the middle of the turnout sleeper, the elastic pad can be lowered to obtain sufficient space, and then the elastic pad can be directly pulled out laterally.

[0037] Furthermore, for the elastic pads belonging to the movable section of the switch rail, the fixed section of the switch rail with a platform, or the frog guard rail area, the following methods are used for removal:

[0038] Raise the corresponding switch rail or guard rail to the set height;

[0039] Raise the base rail so that the bottom of the base rail is higher than the iron base on one side;

[0040] Lift the elastic pad to be replaced upwards from the other side, causing the elastic pad to twist and tilt until the elastic pad is freed from the clamping.

[0041] Pull out the elastic pad along the inclined direction of the elastic pad.

[0042] Within the area defined by this solution, there exists a special clamping tongue structure. Because the clamping tongue presses against the bottom of the stock rail, the elastic pad cannot fall directly after being moved to the center of the turnout sleeper. To overcome this problem, this solution involves appropriately raising the corresponding switch rail or guard rail again, while slightly raising the stock rail until its bottom is higher than the iron seat on one side. In this state, the elastic pad can be twisted from the other side to tilt it until it is freed from the clamping tongue, and then the elastic pad can be pulled out at an angle.

[0043] Furthermore, for the elastic pads located in the long-distance clamping area of ​​the wing rail or the end section of the fork point rail, the following method is used for removal:

[0044] Locate the planing position on the bottom of the rail that is closest to the elastic pad to be replaced along both sides of the rail longitudinally;

[0045] Select a planing location on the bottom of the rail and remove all elastic pads between that planing location and the elastic pad to be replaced.

[0046] Move the elastic pad to be replaced along the bottom line of the wing rail to the planing position;

[0047] Allow the elastic pad to be replaced to fall freely at the mid-span of the turnout sleeper, and then pull the elastic pad out laterally.

[0048] Within the area defined by this solution, the elastic pad has a specially structured platform under the frog rail, with both sides secured to the bottom of the wing rail by 30mm long pressure tongues for stability. Therefore, during replacement, the elastic pad will be pressed against the bottom of the wing rail and cannot be lowered. Furthermore, the existing structure securing both sides does not allow for a rotational replacement method similar to the previous technical solution. To address this, this solution proposes moving the elastic pad in this area along the bottom line of the wing rail to the planed section at the bottom of the rail. At the planed section, the pressure tongues on the platform on the pad are offset, thus releasing the clamping force, allowing the elastic pad to be directly removed laterally in the middle of the turnout sleeper span. However, to move it to the planed section, all elastic pads along the moving route must first be removed. Therefore, this solution also requires finding the planed section at the bottom of the rail closest to the elastic pad to be replaced along the longitudinal direction of the rail. There are two planed sections to choose from, and one of these sections is selected to perform the above operation. The choice of planing location can be flexibly selected based on the on-site working conditions, such as choosing a location that is closer, requires fewer elastic pads to be removed along the way, or is more convenient to remove elastic pads along the way.

[0049] In addition, the planing position of the rail bottom in this solution is a technical term in the field, such as the frog throat; for the high-speed turnouts of the passenger dedicated line series, the inner rail bottom of the wing rail at the frog throat is planed by 35mm.

[0050] Furthermore, for the elastic pads located in the short-distance clamping area of ​​the wing rail or the short-center rail end section, the following method is used for removal:

[0051] Cut the iron seat corner on the elastic pad;

[0052] Replace the original gauge block that came with the turnout with a self-limiting gauge block that matches the angle of the cut iron seat.

[0053] Locate the planing position on the bottom of the rail that is closest to the elastic pad to be replaced along both sides of the rail longitudinally;

[0054] Select a planing location on the bottom of the rail and remove all elastic pads between that planing location and the elastic pad to be replaced.

[0055] Move the elastic pad to be replaced along the bottom line of the wing rail to the planing position;

[0056] Allow the elastic pad to be replaced to fall freely at the mid-span of the turnout sleeper, and then pull the elastic pad out laterally.

[0057] Within the area defined by this solution, the elastic pad is subjected to short-distance clamping from both sides of the wing rails, and its upper platform has a certain inclination along the longitudinal direction of the track. Movement of the elastic pad will result in interference and jamming between the platform and the inner rail base of the two wing rails, and between the iron seat and the outer rail base of the two wing rails, preventing movement. Therefore, rotational replacement or sleeper relocation replacement is not possible. To address this special working condition, this solution proposes a replacement method involving partial cutting of the structure. The original gauge block of the turnout is replaced with a self-limiting gauge block that matches the clamping angle of the cut iron seat. After cutting, the sleeper relocation replacement method is then used. The term "self-limiting gauge block" is a technical term in this field.

[0058] When implementing this plan on-site, the specific cutting range needs to be demonstrated separately based on the specific operation and use of the turnouts on-site, therefore no specific limit is made here.

[0059] Furthermore, before cutting the iron seat angle on the elastic pad, verify whether the current cutting scheme meets the mechanical and performance requirements. If not, change the current cutting scheme and re-verify until the mechanical and performance requirements are met. The verification method can be adapted according to the specific working conditions and on-site capabilities, such as using simulation or theoretical calculation.

[0060] Compared with the prior art, the present invention has at least the following advantages and beneficial effects:

[0061] 1. This invention provides a method for replacing elastic pads in the turnout area of ​​high-speed passenger dedicated lines. The method is simple and convenient to operate, highly practical, and solves the problems of blind construction, low efficiency, difficulty in ensuring accuracy, and high construction difficulty under complex working conditions in the existing technology for replacing elastic pads in the turnout area of ​​high-speed passenger dedicated lines.

[0062] 2. This invention provides a method for replacing elastic pads in the turnout area of ​​high-speed passenger dedicated lines. It provides full-process guidance for replacing elastic pads in the turnout area of ​​high-speed passenger dedicated lines, significantly improving the reliability and structural safety of the replacement process. It meets the needs of standardized and refined on-site maintenance and avoids the problem of secondary damage to the existing structure or the introduction of new safety hazards due to inappropriate replacement methods. It fills the gap in the theory and engineering practice of existing technologies. Attached Figure Description

[0063] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0064] Figure 1 This is a flowchart illustrating a specific embodiment of the present invention;

[0065] Figure 2 This is a schematic diagram of the starting point of a specific embodiment of the present invention;

[0066] Figure 3 This is a schematic diagram of the turnout area division in a specific embodiment of the present invention.

[0067] Figure 4 This is a schematic diagram illustrating the replacement method one in a specific embodiment of the present invention;

[0068] Figure 5 This is a schematic diagram of the replacement method two in a specific embodiment of the present invention;

[0069] Figure 6 This is a schematic diagram of the wing rail baseline type in a specific embodiment of the present invention, representing the replacement method two.

[0070] Figure 7 This is a schematic diagram of the cutting portion of the iron base corner in a specific embodiment of the present invention.

[0071] The attached diagram shows the markings and corresponding component names:

[0072] 1-Lifting equipment, 2-Elastic pad, 3-Special pressure tongue structure of the pad, 4-Cutting part. Detailed Implementation

[0073] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0074] Example 1:

[0075] like Figure 1 The method for replacing the elastic pads in the turnout area of ​​a high-speed passenger dedicated line, as shown, includes the following steps:

[0076] Step S1: Prepare for replacing the elastic pad.

[0077] Specifically, it includes:

[0078] Prepare lifting tools and dismantling fixtures, including hydraulic jacks, torque wrenches, and pry bars. Bring in replacement materials, including elastic pads, matching bolts, washers, and gauge blocks.

[0079] Original static data collection for high-speed turnout area: Measure and record the original geometric dimensions of the turnout frame in accordance with TG_GW115-2023 "Rules for Maintenance of High-Speed ​​Railway Lines".

[0080] Step S2: Determine if an electric switch machine exists in the work area: If it exists, remove the electric switch machine.

[0081] Step S3: Place the elastic pads to be replaced to the corresponding positions according to the sleeper numbers. At the same time, use tools such as an electric torque wrench to remove the positioning devices on the track in the work area. The positioning devices may include: pad bolts, T-bolts, support plates, fastener springs, gauge blocks, anti-rotation washers for springs, cap nuts, rail pads, spring washers, cover plates, buffer adjustment blocks, and other possible components.

[0082] During dismantling, pay attention to numbering and marking components such as buffer adjustment blocks and gauge blocks to ensure correct installation and restoration later. Removed bolts, nuts, and rail washers should be collected in groups.

[0083] Afterwards, loosen the pad bolts and fastener T-bolts on several fork sleepers before and after the elastic pad to be replaced.

[0084] In this embodiment, for the specific turnout sleeper location where the elastic pad needs to be replaced, the pad bolts and fastener T-bolts on the six turnout sleepers in front of and behind it are loosened to enable the next step of lifting the rail.

[0085] Step S4: Lift the rails in the work area using track-lifting equipment, such as... Figure 2 As shown.

[0086] If the work area is a fixed section of the switch rail with a platform, the rail is lifted using a gantry crane; otherwise, the hydraulic jack is placed in the middle of the adjacent turnout sleeper in front of or behind the elastic pad to be replaced along the longitudinal direction of the rail, and the rail is lifted appropriately.

[0087] Preferably, the rail is raised to a height sufficient to allow for the removal of the shims within the range of four turnout sleepers before and after the starting position, facilitating continuous replacement of the elastic shims.

[0088] Step S5: Move the elastic pad to be replaced longitudinally along the rail forward or backward to the mid-span position of the turnout sleeper.

[0089] Step S6: Remove the elastic pad to be replaced; install a new elastic pad.

[0090] After removing the elastic pads, check the condition of the corresponding rail pads, as well as the quantity and condition of the height adjustment shims. If any are crushed or damaged, replace them promptly. If the rail pads are stuck to the rail base, use tools such as shovels and scrapers to remove them.

[0091] After removing the elastic pad, the surface of the turnout sleeper at the new location must be thoroughly cleaned to prevent debris from affecting the installation quality of the new elastic pad. Place the rail pad on the corresponding position of the newly replaced elastic pad, and repeat the process in reverse for different areas to reinstall the new elastic pad. During this process, ensure the position of the rail pad relative to the elastic pad remains unchanged until it is correctly installed. Adjust the thickness of the elastic pad's lower shim according to the specific conditions of the track.

[0092] Step S7: Reset the raised rail and install the removed positioning device.

[0093] In this embodiment, after resetting the raised rails, the track-lifting equipment is removed. The positioning devices removed in step 3, such as gauge blocks, fasteners, and pad bolts, are then correctly installed according to their original numbers and markings. If the replacement of elastic pads is carried out continuously in the same area, all planned elastic pads must be replaced before the track-lifting equipment is removed and the positioning devices are installed uniformly. Never install gauge blocks, fasteners, or other components while the rails are raised. If a positioning device is found to be damaged or ineffective, it should be replaced with the corresponding model immediately, and the old material should be recycled.

[0094] Step S8: Adjust the rails, fastening system, and base plate bolts until the current geometry of the turnout meets the requirements. "Meets the requirements" means meeting the limits specified for the current track. Alternatively, when the original geometry meets the requirements, the current geometry of the turnout can be compared with the original geometry.

[0095] Specifically, after replacement and resetting, the geometry of the replaced turnout rail is restored using the rail on the other side of the same track as the turnout as a reference, ensuring that the static geometry meets the standards. After restoration, on-site personnel conduct a re-inspection according to the standards and record the results, while also checking and confirming that the replaced elastic pad is in good condition.

[0096] Example 2:

[0097] A method for replacing elastic pads in the turnout area of ​​a high-speed passenger dedicated line, based on Embodiment 1, wherein step S6, the method for removing the elastic pad to be replaced, includes:

[0098] S601. Divide the turnout area into several zones.

[0099] This embodiment divides the turnout area into 9 zones. For details of the division, please refer to Table 1 and... Figure 3 As shown.

[0100] Table 1. Explanation of Turnout Zone Division

[0101]

[0102] S602. Determine the area of ​​the turnout zone to which the elastic pad to be replaced belongs.

[0103] S603. Different methods are used to remove the elastic pads for different areas.

[0104] Specifically, this embodiment proposes the following four different replacement methods for the elastic pads in different areas:

[0105] Replacement Method 1: If the elastic pad to be replaced is located in area A, area B-I, area C-I, or area D, then remove it using the following method: Figure 4 As shown, the elastic pad to be replaced is allowed to fall freely at the mid-span position of the turnout sleeper, and then the elastic pad is pulled out laterally. Figure 4 The arrows in the diagram indicate the direction of movement of the elastic pad.

[0106] Replacement Method Two: If the elastic pad to be replaced is located in area B-II, B-III, or area C-II, then the following method shall be used for removal:

[0107] Raise the corresponding switch rail or guard rail to the set height;

[0108] Raise the base rail so that the bottom of the base rail is higher than the iron base on one side;

[0109] Lift the elastic pad to be replaced upwards from the other side, causing the elastic pad to twist and tilt until the elastic pad is freed from the clamping.

[0110] Pull out the elastic pad along its inclined direction; please refer to the diagram for a detailed illustration of this replacement method. Figure 5 .

[0111] Replacement Method 3: If the elastic pad to be replaced is located in area C-Ⅲ, it shall be removed using the following method:

[0112] Locate the planing position on the bottom of the rail that is closest to the elastic pad to be replaced along both sides of the rail longitudinally;

[0113] Select a planing location on the bottom of the rail and remove all elastic pads between that planing location and the elastic pad to be replaced.

[0114] Move the elastic pad to be replaced along the bottom line of the wing rail to the planing position;

[0115] Allow the elastic pad to be replaced to fall freely at the mid-span of the turnout sleeper, and then pull the elastic pad out laterally.

[0116] Among them, the planing location at the bottom of the rail is as follows: Figure 6 As shown, Figure 6 The red lines in the diagram represent the bottom line of the wing track, and the widened area is the cutting position.

[0117] Replacement Method 4: If the elastic pad to be replaced is located in area C-Ⅳ, then the following method shall be used for removal:

[0118] The cutting of the iron seat angle on the cutting elastic pad can be referenced. Figure 7 As shown; then the original gauge block of the turnout was replaced with a self-limiting gauge block that matches the angle of the cut iron seat.

[0119] Then proceed with method three.

[0120] Furthermore, in Method 4, before cutting the iron seat corner on the elastic pad, it is necessary to verify whether the current cutting scheme meets the mechanical and performance requirements. If it does not meet the requirements, the current cutting scheme should be changed and the verification should be repeated until the mechanical and performance requirements are met.

[0121] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0122] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A method for replacing elastic pads in the turnout area of ​​a high-speed passenger dedicated line, characterized in that, Includes the following steps: S1. Collect the original static data of the high-speed turnout area and obtain the original geometric dimensions of the turnout; S2. Determine if an electric switch machine exists in the work area: If it exists, remove the electric switch machine; S3. Remove the positioning device in the work area; loosen the pad bolts and fastener T-bolts on several fork sleepers before and after the elastic pad to be replaced; S4. Lift the rails in the work area using track-lifting equipment; S5. Move the elastic pad to be replaced longitudinally forward or backward along the rail to the middle position of the turnout sleeper. S6. Remove the elastic pad to be replaced; install a new elastic pad. S7. Reset the raised rails and install the removed positioning device; S8. Adjust the rails, fastening system, and base plate bolts until the current geometry of the turnout meets the requirements.

2. The method for replacing elastic pads in the high-speed turnout area of ​​a passenger dedicated line according to claim 1, characterized in that, The positioning device includes any one or more of the following: pad bolts, T-bolts, support buckles, fasteners, and gauge blocks.

3. The method for replacing elastic pads in the high-speed turnout area of ​​a passenger dedicated line according to claim 1, characterized in that, In step S4, if the work area is a fixed section of the switch rail with a platform, the rail is lifted by a gantry crane; otherwise, the hydraulic jack is placed in the middle of the adjacent turnout sleeper in front of or behind the elastic pad to be replaced along the longitudinal direction of the rail, and the rail is lifted.

4. The method for replacing elastic pads in the high-speed turnout area of ​​a passenger dedicated line according to claim 1, characterized in that, In step S6, the method for removing the elastic pad to be replaced includes: The turnout area is divided into several zones; Determine the area of ​​the turnout section where the elastic pad to be replaced belongs; Different methods were used to remove the elastic pads from different areas.

5. A method for replacing elastic pads in the high-speed turnout area of ​​a passenger dedicated line according to claim 4, characterized in that, The switch area is divided into any one or more of the following: The areas in front of the switch tip, the guide curve area of ​​the turnout area, the fixed section area of ​​the switch switch without a platform, the movable section area of ​​the switch switch, the fixed section area of ​​the switch switch with a platform, the area in front of the frog tip, the non-clamping section area of ​​the wing rail, the frog guard rail area, the long-distance clamping area of ​​the wing rail, the area at the foot of the fork switch, the short-distance clamping area of ​​the wing rail, the short frog foot section, and the transition area after the turnout in the turnout area.

6. A method for replacing elastic pads in the turnout area of ​​a high-speed passenger dedicated line according to claim 5, characterized in that, For elastic pads in areas including the area in front of the switch tip, the guide curve area of ​​the turnout, the fixed section of the switch switch without a platform, the non-clamping section of the wing rail, or the transition area after the turnout in the turnout area, the following method shall be used for removal: Allow the elastic pad to be replaced to fall freely at the mid-span of the turnout sleeper, and then pull the elastic pad out laterally.

7. A method for replacing elastic pads in the turnout area of ​​a high-speed passenger dedicated line according to claim 5, characterized in that, For the elastic pads belonging to the movable section of the switch rail, the fixed section of the switch rail with a platform, or the frog guard rail area, the following method shall be used for removal: Raise the corresponding switch rail or guard rail to the set height; Raise the base rail so that the bottom of the base rail is higher than the iron base on one side; Lift the elastic pad to be replaced upwards from the other side, causing the elastic pad to twist and tilt until the elastic pad is freed from the clamping. Pull out the elastic pad along the inclined direction of the elastic pad.

8. A method for replacing elastic pads in the turnout area of ​​a high-speed passenger dedicated line according to claim 5, characterized in that, For elastic pads located in areas where the wing rails are long-distance clamping zones or at the heel end of the fork rails, the following method is used for removal: Locate the planing position on the bottom of the rail that is closest to the elastic pad to be replaced along both sides of the rail longitudinally; Select a planing location on the bottom of the rail and remove all elastic pads between that planing location and the elastic pad to be replaced. Move the elastic pad to be replaced along the bottom line of the wing rail to the planing position; Allow the elastic pad to be replaced to fall freely at the mid-span of the turnout sleeper, and then pull the elastic pad out laterally.

9. A method for replacing elastic pads in the high-speed turnout area of ​​a passenger dedicated line according to claim 5, characterized in that, For elastic pads located in the short-distance clamping area of ​​the wing rail or the end section of the short center rail, the following method is used for removal: Cut the iron seat corner on the elastic pad; Replace the original gauge block that came with the turnout with a self-limiting gauge block that matches the angle of the cut iron seat. Locate the planing position on the bottom of the rail that is closest to the elastic pad to be replaced along both sides of the rail longitudinally; Select a planing location on the bottom of the rail and remove all elastic pads between that planing location and the elastic pad to be replaced. Move the elastic pad to be replaced along the bottom line of the wing rail to the planing position; Allow the elastic pad to be replaced to fall freely at the mid-span of the turnout sleeper, and then pull the elastic pad out laterally.

10. A method for replacing elastic pads in the high-speed turnout area of ​​a passenger dedicated line according to claim 9, characterized in that, Before cutting the iron seat corner on the elastic pad, verify whether the current cutting scheme meets the mechanical and performance requirements. If not, change the current cutting scheme and re-verify until the mechanical and performance requirements are met.

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