Tapered rail track with auxiliary long pillow and limiting pin
By using limit pins and auxiliary long sleepers in the trapezoidal sleeper track, the problems of large space occupation and construction difficulties of traditional trapezoidal sleepers are solved, achieving more efficient construction and maintenance, and reducing costs and material consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANJINGER (SHANGHAI) TECH CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-03
AI Technical Summary
Traditional trapezoidal sleepers occupy a large space, the limiting boss structure is easily damaged, and there is a tendency for empty hoisting and hard collisions to occur during construction, and the construction cost is high.
By using a limiting pin method, auxiliary long sleepers are installed below the longitudinal beam, and limiting pins are set on the auxiliary sleepers to cooperate with the reserved holes, so as to realize the longitudinal and lateral limiting of the trapezoidal sleepers, reducing the dependence of construction on space and materials.
The trapezoidal sleeper track width and material consumption are reduced, construction dependence is reduced, inspection and maintenance are facilitated, construction costs are reduced, and energy conservation and emission reduction are achieved.
Smart Images
Figure CN224451280U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of rail transit technology, specifically a trapezoidal sleeper track with a limiting pin for limiting the auxiliary long sleeper. Background Technology
[0002] Traditional trapezoidal sleepers are frame-type track structures consisting of two prestressed concrete longitudinal beams, transverse connecting members, vibration damping pads, and buffer pads. Vibration damping pads and buffer pads are installed on the lower and outer sides of the longitudinal beams, respectively, with a limiting boss on the outer side of the longitudinal beam. Traditional trapezoidal sleeper tracks use an L-shaped ballast bed. The trapezoidal sleeper achieves longitudinal limitation through the interaction between the limiting boss / buffer pad and the ballast bed abutment, and lateral limitation through the interaction between the buffer pad on the outer side of the longitudinal beam and the abutment. However, the limiting boss structure results in traditional trapezoidal sleepers occupying a large space, especially in areas with limited space such as tunnels. Furthermore, the damping and buffering structure at the limiting boss is prone to damage and difficult to repair or replace.
[0003] Traditional trapezoidal sleeper construction requires first erecting the track panel above the reinforcing cage, then pouring concrete supports. During this process, isolation materials and covers are needed to separate the trapezoidal sleepers from the surrounding concrete to prevent them from sticking. However, during construction, on-site workers may not be precise enough, failing to meet all relevant specifications. When the covers or isolation materials are damaged, missing, or improperly installed, the bottom support of the trapezoidal sleeper may stick to the sleeper during pouring, creating a "hard-on-hard" contact and rendering the vibration damping pad ineffective. Furthermore, in some unfavorable situations, due to insufficient concrete slump or large curve deviations, inadequate on-site vibration can easily lead to voids beneath the vibration damping pad. Additionally, on-site installation of covers increases laying costs.
[0004] Based on this, the inventors conducted in-depth research on existing trapezoidal sleeper tracks and their construction methods, hoping to design a trapezoidal sleeper track structure that can solve the above problems. Utility Model Content
[0005] To overcome the aforementioned problems, the inventors conducted in-depth research and designed a trapezoidal sleeper track with auxiliary long sleepers and limiting pins for positioning. This sleeper track employs limiting pins for positioning. The track includes a novel trapezoidal sleeper structure, with auxiliary long sleepers positioned below vibration damping pads. The auxiliary long sleepers are integrally cast with the base of the trapezoidal sleeper. Limiting pins are pre-embedded on the auxiliary sleepers, and their interaction with pre-drilled holes on the trapezoidal sleepers achieves longitudinal and lateral positioning of the trapezoidal sleepers. This solution addresses the potential problems of empty suspension and hard-on-hard contact in existing trapezoidal sleeper technologies, reducing the dependence of trapezoidal sleeper tracks on construction. It allows for more comprehensive monitoring of the limiting surface interacting with the vibration damping pads of the trapezoidal sleepers, facilitating inspection and maintenance. Furthermore, it reduces the width of the trapezoidal sleeper track, decreasing track space occupancy and material usage, thus achieving energy conservation and emission reduction. This completes the present invention.
[0006] Specifically, the purpose of this utility model is to provide a trapezoidal sleeper track with a limiting pin for limiting the auxiliary long pillow, comprising:
[0007] Two longitudinal beams 1 and a connecting steel pipe 2 for connecting the longitudinal beams 1 are used to fix the two longitudinal beams 1 into a trapezoidal sleeper through the connecting steel pipe 2;
[0008] An auxiliary long pillow is laid below the longitudinal beam 1;
[0009] The auxiliary long pillow is laid in a direction perpendicular to the extension direction of the longitudinal beam 1, and there are multiple auxiliary long pillows arranged at intervals. The auxiliary long pillow located in the middle is the middle auxiliary long pillow 3, and the auxiliary long pillow located at the edge is the end auxiliary long pillow 4.
[0010] The auxiliary pillow and its base below it are cast as a single structure;
[0011] A longitudinally through pre-drilled hole 5 is provided on the longitudinal beam 1;
[0012] The two ends of the central auxiliary pillow 3 are provided with upwardly extending limiting pins 6.
[0013] The limiting pin 6 is inserted into the reserved hole 5, and the limiting pin 6 and the reserved hole 5 cooperate to provide a horizontal limit for the trapezoidal sleeper.
[0014] Vibration damping pads 7 are laid between the longitudinal beam 1 and the auxiliary long pillow.
[0015] In this process, a through hole is made in the vibration damping pad 7, and the position of the through hole corresponds to the reserved hole 5, that is, the axis of the through hole and the axis of the reserved hole 5 are collinear.
[0016] The inner diameter of the through hole is slightly larger than the inner diameter of the reserved hole 5.
[0017] The reserved hole 5 is a frustum hole, meaning that the inner diameter of the reserved hole 5 gradually increases from top to bottom.
[0018] The limiting pin 6 is fitted with a bushing 8 and a buffer bushing 9. The buffer bushing 8 can be inserted into the reserved hole 5 from bottom to top.
[0019] The buffer bushing 8 has a frustum-shaped outer surface, meaning that the outer diameter of the buffer bushing 8 gradually increases from top to bottom.
[0020] The bushing sleeve 8 is located inside the buffer bushing 9 and is interference-fitted.
[0021] The bushing sleeve 8 is a metal tube, which is sleeved outside the limiting pin 6 and can drive the buffer bushing 9 to rotate together.
[0022] The center of the buffer bushing 9 is 2mm off-center from the center of the bushing tube 8.
[0023] The auxiliary long pillow is a precast reinforced concrete block.
[0024] A steel truss 10 is provided at the bottom of the auxiliary long pillow, and the auxiliary long pillow and the steel truss 10 are cast together with the base 11 below as an integral structure.
[0025] A connecting sleeve 12 is pre-embedded on the top of the auxiliary long sleeper. The connecting sleeve 12 is used to temporarily fix the auxiliary long sleeper and the trapezoidal sleeper during construction.
[0026] The upper section of the limiting pin 6 is located above the middle auxiliary pillow 3, the middle section of the limiting pin 6 is embedded in the middle auxiliary pillow 3, and the lower section of the limiting pin 6 is located below the middle auxiliary pillow 3.
[0027] Around the middle section of the limiting pin 6, a steel sheet is provided in the middle auxiliary pillow 3 to strengthen the connection between the limiting pin 6 and the middle auxiliary pillow 3.
[0028] The lower section of the limiting pin is cast integrally with the base 11.
[0029] The beneficial effects of this utility model include:
[0030] (1) The trapezoidal sleeper track with auxiliary long sleeper and limiting pin and its construction method provided by this utility model solve the problems of empty suspension and hard collision that may occur in the existing trapezoidal sleeper, and reduce the dependence of the trapezoidal sleeper track on construction.
[0031] (2) The trapezoidal sleeper track with auxiliary long pillow and limiting pin and its construction method provided by this utility model can be more comprehensively monitored by the limiting surface that interacts with the trapezoidal sleeper vibration damping pad, which is convenient for inspection and maintenance.
[0032] (3) The trapezoidal sleeper track with auxiliary long pillow and limiting pin provided by this utility model and its construction method do not require the pouring of track bed retaining platform. The width of the trapezoidal sleeper track is reduced, thereby reducing the occupation of track space and material consumption, saving costs, and achieving the purpose of energy conservation and emission reduction. Attached Figure Description
[0033] Figure 1 This diagram shows a three-dimensional structural schematic of the trapezoidal sleeper track with a limiting pin for auxiliary long pillows provided by this utility model.
[0034] Figure 2 This invention provides a three-dimensional structural diagram of a trapezoidal sleeper in a track with a limiting pin for limiting the sleeper with an auxiliary long pillow.
[0035] Figure 3 This invention provides a three-dimensional structural diagram of an auxiliary long pillow at the middle end of a trapezoidal sleeper track with a limiting pin for limiting the auxiliary long pillow.
[0036] Figure 4 This invention provides a three-dimensional structural diagram of the auxiliary long pillow in the middle of a trapezoidal sleeper track with a limiting pin for limiting the auxiliary long pillow.
[0037] Figure 5 This invention provides a schematic diagram of the buffer bushing and bushing sleeve in a trapezoidal sleeper track with a limiting pin for limiting auxiliary long pillows.
[0038] Figure 6 This diagram illustrates the placement of the auxiliary long sleeper in a trapezoidal sleeper track with a limiting pin for limiting the auxiliary long sleeper provided by this utility model.
[0039] Figure 7 This invention provides a schematic diagram showing the structure of a trapezoidal sleeper with an auxiliary long sleeper and a limiting pin, which binds the auxiliary long sleeper and the trapezoidal sleeper together to form a fixed unit during track construction.
[0040] Figure Labels
[0041] 1-Longitudinal Beam
[0042] 2-Connecting steel pipe
[0043] 3-Middle auxiliary long pillow
[0044] 4-End auxiliary long pillow
[0045] 5-Pre-drilled holes
[0046] 6-Limit pin
[0047] 7-Vibration damping pad
[0048] 8-Bushing Sleeve
[0049] 9-Buffer Bushing
[0050] 10-Reinforced steel truss
[0051] 11-Base
[0052] 12-Connecting sleeve
[0053] 13-Long Bolt
[0054] 14-square steel pipe
[0055] 15-Ladder sleeper cover plate Detailed Implementation
[0056] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present invention will become clearer and more apparent.
[0057] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.
[0058] This utility model provides a trapezoidal sleeper track with a limiting pin for limiting the auxiliary long pillow, such as... Figure 1 and Figure 2 As shown, the sleeper track includes: two longitudinal beams 1 and a connecting steel pipe 2 for connecting the longitudinal beams 1, the two longitudinal beams 1 are fixed together to form a trapezoidal sleeper by the connecting steel pipe 2; auxiliary long sleepers are laid under the longitudinal beams 1;
[0059] The auxiliary long pillow is laid in a direction perpendicular to the extension direction of the longitudinal beam 1, and there are multiple auxiliary long pillows. Generally, 5-8 auxiliary long pillows can be set below the longitudinal beam. The multiple auxiliary long pillows are arranged at intervals. Among them, the auxiliary long pillow located in the middle is the middle auxiliary long pillow 3, and the auxiliary long pillow located at the edge is the end auxiliary long pillow 4.
[0060] The auxiliary long pillow is a prefabricated component, and during subsequent construction, the auxiliary long pillow and the base below it are cast into an integral structure.
[0061] A longitudinally through pre-drilled hole 5 is provided on the longitudinal beam 1; upwardly extending limiting pins 6 are provided at both ends of the auxiliary long pillow 3 in the middle.
[0062] The limiting pin 6 is inserted into the reserved hole 5, and the limiting pin 6 and the reserved hole 5 provide horizontal limiting for the trapezoidal sleeper through the limiting engagement. A buffer bushing or other limiting and buffering structure is provided between the limiting pin 6 and the inner wall of the reserved hole 5, so that the limiting and buffering structure is simple and efficient, and the position of the buffering structure is visible and maintainable.
[0063] Preferably, a vibration damping pad 7 is laid between the longitudinal beam 1 and the auxiliary long pillow. The vibration damping pad 7 is laid in a dotted manner, and the vibration damping pad 7 is provided at all contact surfaces between the auxiliary long pillow and the longitudinal beam 1.
[0064] A through hole is made in the vibration damping pad 7, and the position of the through hole corresponds to the reserved hole 5, that is, the axis of the through hole and the axis of the reserved hole 5 are collinear;
[0065] The inner diameter of the through hole is slightly larger than the inner diameter of the reserved hole 5, that is, larger than the maximum inner diameter of the reserved hole, which is the bottom inner diameter of the reserved hole.
[0066] Preferably, the reserved hole 5 is a frustum-shaped hole, meaning that the inner diameter of the reserved hole 5 gradually increases from top to bottom. This gradually increasing reserved hole facilitates the positioning and insertion of the limiting pin and the buffer bushing.
[0067] In a preferred embodiment, such as Figure 5 As shown, a bushing sleeve 8 and a buffer bushing 9 are sleeved on the outside of the limiting pin 6. The buffer bushing 8 can be inserted into the reserved hole 5 from bottom to top. The buffer bushing 8 is frustoconical in shape, that is, the outer diameter of the buffer bushing 8 gradually increases from top to bottom.
[0068] The bushing 8 is located inside the buffer bushing 9 and is interference-fitted, allowing the bushing 8 and the buffer bushing 9 to rotate synchronously. The bushing 8 is a metal tube, fitted outside the limiting pin 6, and can drive the buffer bushing 9 to rotate together around the axis of the limiting pin 6. The gap between the bushing 8 and the limiting pin 6 is kept as small as possible.
[0069] The buffer bushing 9 is made from the buffer pad on a traditional trapezoidal sleeper and has a certain degree of elasticity. The buffer bushing 9 fills the gap between the reserved hole 5 and the limiting pin, which can not only buffer the trapezoidal sleeper, but also ensure that the trapezoidal sleeper and the auxiliary long sleeper can be installed smoothly. Even if there are certain processing errors in the positions of the reserved hole 5 and the limiting pin, it can still ensure that the limiting pin and the buffer bushing 9 can be smoothly inserted into the reserved hole 5.
[0070] In a preferred embodiment, the auxiliary long pillow is a precast reinforced concrete block, such as... Figure 3 and Figure 4As shown, a steel truss 10 is provided at the bottom of the auxiliary sleeper, and the auxiliary sleeper and the steel truss 10 are cast together with the base 11 below as an integral structure; a connecting sleeve 12 is pre-embedded at the top of the auxiliary sleeper, and the connecting sleeve 12 is used to temporarily fix the auxiliary sleeper and the trapezoidal sleeper during construction.
[0071] In a preferred embodiment, the upper section of the limiting pin 6 is located above the middle auxiliary pillow 3, the middle section of the limiting pin 6 is embedded in the middle auxiliary pillow 3, and the lower section of the limiting pin 6 is located below the middle auxiliary pillow 3.
[0072] Around the middle section of the limiting pin 6, steel plates are provided in the middle auxiliary pillow 3 to strengthen the connection between the limiting pin 6 and the middle auxiliary pillow 3; the lower section of the limiting pin is cast integrally with the base 11, which can provide greater longitudinal and lateral resistance.
[0073] This utility model also provides a construction method for a trapezoidal sleeper track with a limiting pin for limiting the auxiliary long sleeper, the construction method including the following steps:
[0074] Step 1: Position the vibration damping pad 7 on the bottom surface of the trapezoidal sleeper, accurately and horizontally place the auxiliary long sleeper, arrange the end auxiliary long sleepers 4 at both ends of the trapezoidal sleeper, arrange the middle auxiliary long sleeper 3 in the middle of the trapezoidal sleeper, and put the bushing sleeve 8 and the buffer bushing 9 on the limit pin.
[0075] Step 2: The trapezoidal sleeper is hoisted into place and lowered, so that the vibration damping pad 7 of the trapezoidal sleeper is close to the top surface of the buffer bushing 9 by about 10mm; the thickness of the longitudinal beam 1 and the height of the buffer bushing are both greater than 10mm, so that while the bottom of the buffer bushing is fitted on the limiting pin 6, the top of the buffer bushing can extend into the reserved hole 5.
[0076] Step 3: Apply glue around the buffer bushing, rotate the buffer bushing appropriately to make the top of the buffer bushing precisely aligned with the reserved hole 5, lift the buffer bushing upwards to insert it into the reserved hole 5 of the longitudinal beam 1.
[0077] In this application, the axis of the buffer bushing 9 is not collinear with the axis of the bushing sleeve 8, and is set with a 2mm eccentricity. This prevents the buffer bushing 9 from rotating and falling off under vibration loads during operation, ensuring a long-term tight fit with the pre-drilled hole in the ladder sleeper. Therefore, during installation, the buffer bushing needs to be rotated appropriately to align it with the pre-drilled hole 5. This eccentric structure can also self-adjust for equipment machining errors, ensuring smooth construction and assembly.
[0078] In this application, applying adhesive around the cushioning bushing is to bond the bushing to the opening surface of the ladder sleeper, and is also one of the measures to prevent the cushioning bushing from falling off.
[0079] Step 4: Lower the trapezoidal sleeper and place it on the auxiliary sleeper to install the buffer bushing in place; after installation, the upper surface of the buffer bushing 9 is flush with and tightly fitted to the upper surface of the longitudinal beam 1, and the lower surface of the buffer bushing 9 is flush with and tightly fitted to the lower surface of the longitudinal beam 1.
[0080] Step 5: Use temporary fixing fixtures to bind the auxiliary long sleeper and the trapezoidal sleeper together to form a fixed unit and complete the temporary fixing; at this time, the longitudinal beam and the auxiliary long sleeper clamp the vibration damping pad.
[0081] Step 6: Transport the secured unit to the work location and adjust its geometry;
[0082] Step 7: The width of the base 11 is the same as the length of the auxiliary long pillow. Before the base is poured, the base formwork is erected on the outside of the longitudinal beam of the fixed unit. The top of the base formwork is slightly higher than 1 / 3 of the height of the concrete part of the auxiliary long pillow.
[0083] Step 8: Base pouring. Concrete is poured from the middle position between the two longitudinal beams 1, and the pouring height of the concrete is controlled.
[0084] Step 9: Apply concrete to the base. For straight sections, the auxiliary sleepers will be set as an arched structure with a high center and low sides. For curved sections, the base surface will be set as a single slope according to the superelevation of the line.
[0085] Step 10: After the concrete reaches 70% of its design strength, remove the base formwork, and then remove the temporary fixing fixtures after removing the base formwork.
[0086] Step 11: After the site is cleaned up, install the ladder sleeper cover plate 15.
[0087] Preferably, the temporary fixing fixture includes a long bolt 13 and a square steel pipe 14. The square steel pipe 14 is placed on two longitudinal beams 1. The long bolt 13 passes through the square steel pipe 14 and is screwed into the connecting sleeve 12 to press the two ends of the square steel pipe 14 onto the longitudinal beams 1, thereby binding the auxiliary long pillow and the ladder pillow together to form a fixing unit.
[0088] Example
[0089] A 1000-meter-long bridge track system will be laid, using trapezoidal sleepers measuring 5900×580×185mm, with auxiliary long sleepers and limiting pins for positioning. This sleeper track includes, for example... Figure 2 The trapezoidal sleeper shown also includes, for example, Figure 3 and Figure 4 The auxiliary pillow shown also has features such as Figure 5 The bushing and buffer bushing shown are arranged according to Figure 6 The auxiliary long sleeper is placed at the indicated position, and the track bed base is poured below the trapezoidal sleeper.
[0090] The following construction methods will be used:
[0091] Step 1: Position the vibration damping pad 7 on the bottom surface of the trapezoidal sleeper, accurately and horizontally place the auxiliary long sleeper, arrange the end auxiliary long sleepers 4 at both ends of the trapezoidal sleeper, arrange the middle auxiliary long sleeper 3 in the middle of the trapezoidal sleeper, and put the bushing sleeve 8 and the buffer bushing 9 on the limit pin.
[0092] Step 2: The trapezoidal sleeper is hoisted into place and lowered, so that the vibration damping pad 7 of the trapezoidal sleeper is close to the top surface of the buffer bushing 9 by about 10mm; the thickness of the longitudinal beam 1 and the height of the buffer bushing are both greater than 10mm, so that while the bottom of the buffer bushing is fitted on the limiting pin 6, the top of the buffer bushing can extend into the reserved hole 5.
[0093] Step 3: Apply glue around the buffer bushing, rotate the buffer bushing appropriately to make the top of the buffer bushing precisely aligned with the reserved hole 5, lift the buffer bushing upwards to insert it into the reserved hole 5 of the longitudinal beam 1.
[0094] Step 4: Lower the trapezoidal sleeper and place it on the auxiliary sleeper to install the buffer bushing in place; after installation, the upper surface of the buffer bushing 9 is flush with and tightly fitted to the upper surface of the longitudinal beam 1, and the lower surface of the buffer bushing 9 is flush with and tightly fitted to the lower surface of the longitudinal beam 1.
[0095] Step 5: Use temporary fixing fixtures to bind the auxiliary long sleeper and the trapezoidal sleeper together to form a fixing unit, thus completing the temporary fixing;
[0096] Step 6: Transport the secured unit to the work location and adjust its geometry;
[0097] Step 7: The width of the base 11 is the same as the length of the auxiliary long pillow. Before the base is poured, the base formwork is erected on the outside of the longitudinal beam of the fixed unit. The top of the base formwork is slightly higher than 1 / 3 of the height of the concrete part of the auxiliary long pillow.
[0098] Step 8: Base pouring. Concrete is poured from the middle position between the two longitudinal beams 1, and the pouring height of the concrete is controlled.
[0099] Step 9: Apply concrete to the base. For straight sections, the auxiliary sleepers will be set as an arched structure with a high center and low sides. For curved sections, the base surface will be set as a single slope according to the superelevation of the line.
[0100] Step 10: After the concrete reaches 70% of its design strength, remove the base formwork, and then remove the temporary fixing fixtures after removing the base formwork.
[0101] Step 11: After the site is cleaned up, install the ladder sleeper cover plate 15.
[0102] The laying of the 1000-meter-long bridge track system was completed without consuming any protective coverings or other insulating materials. The track bed width was 2 meters, and the amount of track bed concrete used was 338 cubic meters. 3 The amount of steel reinforcement used for the track bed was 69.61 tons, and the amount of molds used was 260m³. 2 A total of 15 workers participated in the work, with each worker working 110 hours; the completed track system was inspected, and no defects such as hard contact or empty suspension were found.
[0103] Comparative Example
[0104] A 1000-meter-long bridge track system will be laid, using traditional trapezoidal sleepers of model 5900×580×185mm. These trapezoidal sleepers are equipped with limiting bosses, and lateral supports are installed on the track bed beneath them. The specific construction method is as follows:
[0105] Step 1: Apply isolation material to the bottom surface of the trapezoidal sleeper, the outer surface of the longitudinal beam, and the end face;
[0106] Step 2: Put the package in a protective sleeve and ensure the sleeve is properly sealed.
[0107] Step 3: Determine the location of the trapezoidal sleeper track bed and mark it with chalk lines;
[0108] Step 4: Tie the reinforcing steel bars of the base and the retaining wall;
[0109] Step 5: Transport and install the trapezoidal sleepers, which have been properly isolated, onto the track bed reinforcement cage;
[0110] Step 6: Erect the mold, including the end mold, the central water ditch mold, and the base and support mold;
[0111] Step 7, adjust the track geometry;
[0112] Step 8: Pour concrete from the side of the trapezoidal sleeper;
[0113] Step 9: Remove the above mold and lay the drainage ditch covers in the middle and at the ends.
[0114] The completion of the 1000-meter-long bridge track system installation required 167 pairs of protective covers and 33.32m³ of insulating pearl cotton. 3 The track bed width is 2.5m, and the amount of track bed concrete used is 480m³. 3 The amount of steel reinforcement used for the track bed was 84.66 tons, and the amount of molds used was 1200m³. 2 A total of 15 workers participated in the work, with each worker working 130 hours. After inspecting the completed track system, 11 hard-to-hard defects and 1 empty-hanging defect were found. Further defect repair was carried out by 5 workers, with each worker working 5 hours.
[0115] As can be seen from the above embodiments and comparative examples, the trapezoidal sleeper track with auxiliary long pillow and limiting pin limit provided in this application and its construction method can not only improve the construction quality, but also shorten the construction time and improve the construction efficiency.
[0116] The present invention has been described above with reference to preferred embodiments; however, these embodiments are merely exemplary and serve only an illustrative purpose. Based on this, various substitutions and improvements can be made to the present invention, all of which fall within the protection scope of the present invention.
Claims
1. A ladder track tie rail with an auxiliary long pillow for limiting the position of a tie limiting pin, characterized in that, include: Two longitudinal beams (1) and a connecting steel pipe (2) for connecting the longitudinal beams (1) are used to fix the two longitudinal beams (1) into a trapezoidal sleeper through the connecting steel pipe (2); An auxiliary long pillow is laid below the longitudinal beam (1); The auxiliary long pillow is laid in a direction perpendicular to the extension direction of the longitudinal beam (1), and there are multiple auxiliary long pillows arranged at intervals. The auxiliary long pillow located in the middle is the middle auxiliary long pillow (3), and the auxiliary long pillow located at the edge is the end auxiliary long pillow (4). The auxiliary pillow and its base below it are cast as a single structure; A longitudinal through-hole (5) is provided on the longitudinal beam (1); The two ends of the central auxiliary pillow (3) are provided with upwardly extending limiting pins (6). The limiting pin (6) is inserted into the reserved hole (5), and the limiting pin (6) and the reserved hole (5) provide a horizontal limit for the trapezoidal sleeper.
2. The trapezoidal sleeper track with auxiliary long pillow and limiting pin as described in claim 1, characterized in that, A vibration damping pad (7) is laid between the longitudinal beam (1) and the auxiliary long pillow.
3. The trapezoidal sleeper track with auxiliary long pillow and limiting pin as described in claim 2, characterized in that, A through hole is made on the vibration damping pad (7), and the position of the through hole corresponds to the reserved hole (5), that is, the axis of the through hole and the axis of the reserved hole (5) are collinear; The inner diameter of the through hole is slightly larger than the inner diameter of the reserved hole (5).
4. The trapezoidal sleeper track with a limiting pin for limiting the auxiliary long sleeper as described in claim 3, characterized in that, The reserved hole (5) is a frustum hole, that is, the inner diameter of the reserved hole (5) gradually increases from top to bottom.
5. The trapezoidal sleeper track with a limiting pin for limiting the auxiliary long sleeper according to claim 1, characterized in that, A bushing sleeve (8) and a buffer bushing (9) are fitted around the limiting pin (6). The buffer bushing (8) can be inserted into the reserved hole (5) from bottom to top. The buffer bushing (8) is frustum-shaped on the outside, meaning that the outer diameter of the buffer bushing (8) gradually increases from top to bottom.
6. The trapezoidal sleeper track with a limiting pin for limiting the auxiliary long pillow as described in claim 5, characterized in that, The bushing sleeve (8) is located inside the buffer bushing (9) and is interference-fitted; The bushing sleeve (8) is a metal tube, which is sleeved outside the limiting pin (6) and can drive the buffer bushing (9) to rotate together.
7. The trapezoidal sleeper track with a limiting pin for limiting the auxiliary long sleeper according to claim 6, characterized in that, The axis of the buffer bushing (9) is 2 mm off-center from the axis of the bushing sleeve (8).
8. The trapezoidal sleeper track with a limiting pin for limiting the auxiliary long sleeper according to claim 1, characterized in that, The auxiliary long pillow is a precast reinforced concrete block. A steel truss (10) is provided at the bottom of the auxiliary long pillow, and the auxiliary long pillow and the steel truss (10) are cast together with the base (11) below as an integral structure.
9. The trapezoidal sleeper track with a limiting pin for limiting the auxiliary long sleeper according to claim 8, characterized in that, A connecting sleeve (12) is pre-embedded on the top of the auxiliary long sleeper. The connecting sleeve (12) is used to temporarily fix the auxiliary long sleeper and the trapezoidal sleeper during construction.
10. The trapezoidal sleeper track with auxiliary long pillow and limiting pin as described in claim 8, characterized in that, The upper section of the limiting pin (6) is located above the middle auxiliary pillow (3), the middle section of the limiting pin (6) is embedded in the middle auxiliary pillow (3), and the lower section of the limiting pin (6) is located below the middle auxiliary pillow (3). Around the middle section of the limiting pin (6), a steel sheet is provided in the middle auxiliary pillow (3) to strengthen the connection between the limiting pin (6) and the middle auxiliary pillow (3); The lower section of the limiting pin is cast as a single unit with the base (11).