Temporary track for single-track railway small-section tunnel portal beam

Abstract

The application relates to a temporary track for erecting a beam at a single-track railway small-section tunnel portal, which comprises two steel rails and a plurality of steel plates distributed along the length direction of the steel rails, the two steel rails are parallel to each other, and the steel plates are arranged at the bottom of the two steel rails, and the steel plates are provided with fastening components for fastening the steel rails to the steel plates. The application lays the steel rails on a ballastless track bed through the steel plates, so as to reduce the laying height of the steel rails and meet the requirement of load bearing capacity during transfer of a bridge erecting machine.

Description

Technical Field

[0001] This application relates to the field of track technology, and in particular to a temporary track for erecting beams at the entrance of a small-section tunnel on a single-track railway. Background Technology

[0002] Rail tracks are generally divided into ballastless tracks and ballasted tracks, but ballasted tracks are still one of the main forms of railway rail transport.

[0003] In small-section tunnels, due to the limited tunnel height, it is necessary to transport the bridge erecting machine to the bridge abutment at the tunnel entrance during bridge construction. Therefore, temporary tracks need to be laid. During this process, sleepers are first laid on the ballasted ballast bed, and then the thickness of the ballasted ballast bed is adjusted to achieve the correct height of the sleepers and the rails laid on them. This ensures that the bridge erecting machine can smoothly pass through the small-section tunnel and meet the construction height requirements.

[0004] However, in ballastless track systems, because the track bed is made of cast concrete and its height cannot be adjusted, laying the sleepers on the ballastless track bed results in a relatively large gap between the rails and the track bed. This can easily cause the bridge erecting machine to interfere with the tunnel ceiling, affecting the transportation and securing of the machine. On the other hand, directly fixing the rails to the track bed can easily damage the track bed structure, affecting the subsequent laying and use of the track within the tunnel. Therefore, how to lay temporary rails on ballastless track beds while minimizing the impact on subsequent track laying is a pressing problem that needs to be solved. Summary of the Invention

[0005] In order to lay temporary tracks on ballastless track beds while minimizing the impact on subsequent track laying, this application provides a temporary track for beam erection at the entrance of a small-section tunnel on a single-track railway.

[0006] This application provides a temporary track for beam erection at the entrance of a small-section tunnel on a single-track railway, employing the following technical solution:

[0007] A temporary track for beam erection at the entrance of a small-section tunnel on a single-track railway includes two steel rails and several steel plates distributed along the length of the rails. The two steel rails are parallel to each other, and the steel plates are placed at the bottom of the two steel rails. The steel plates are provided with fastening components for securing the rails to the steel plates.

[0008] By adopting the above technical solution, the rails are directly connected to the ground via steel plates, and the rails are connected to the steel plates via fastening components. Compared with transporting the bridge erecting machine via transportation equipment or laying the track on the ballastless track via sleepers, the load of the bridge erecting machine can be applied to the ballastless track through a relatively larger contact area, reducing the possibility of damaging the ballastless track. At the same time, the height of the rails can also be reduced to meet the requirements for transporting the bridge erecting machine.

[0009] Optionally, the fastening assembly includes a fastener and a fastening bolt, the fastener overlapping the bottom edge of the rail and the steel plate, and the fastening bolt passing through the fastener and pressing the fastener against the steel plate.

[0010] By adopting the above technical solution, the rail can be fastened to the steel plate by pressing the edge of the rail against the steel plate with fastening bolts.

[0011] Optionally, the fastener includes a snap-fit ​​portion with an arc-shaped rod structure and two overlapping portions. The overlapping portions are formed by bending the end of the snap-fit ​​portion toward a direction away from the arc-shaped opening, and the plane of the overlapping portion swinging during the bending process is set at an angle with the snap-fit ​​portion. The fastening bolt passes through the inner side of the snap-fit ​​portion and is threaded to the steel plate. The snap-fit ​​portion and the overlapping portions overlap the rail and the steel plate. The fastening bolt is provided with a limiting portion on the side facing the opening of the snap-fit ​​portion. The limiting portion is fixedly connected to the snap-fit ​​portion and is used to swing toward the center of the snap-fit ​​portion as the snap-fit ​​portion is pressed into the overlapping portion.

[0012] By adopting the above technical solution, the fastening bolt can always be threaded onto the steel plate. During installation, the fastening bolt slides in from the opening of the fastening part, and the overlapping part first overlaps the bottom edge of the rail. During the tightening process, the fastening part gradually bends elastically toward the rail. At the same time, the overlapping part twists toward the fastening part, and the limiting part rotates a certain angle toward the fastening bolt. When the fastening part slides out relative to the fastening bolt, the limiting part interferes with the fastening bolt to limit the possibility of the fastening part detaching from the fastening bolt due to excessive load or vibration. At the same time, compared with the method of directly threading the fastening bolt, it can also optimize the convenience of installation. Furthermore, when the fastening part is removed, it is only necessary to loosen the fastening bolt to reset the fastening part relative to the overlapping part and reset the limiting part to remove the fastener from the fastening bolt. Thus, when the fastening part is transferred for reuse, the fastening bolt and the steel plate are transported synchronously, reducing the possibility of the fastening bolt becoming loose due to disassembly and transportation.

[0013] Optionally, the overlapping portion is bent toward the side opposite to the limiting portion to form an abutting portion, which is fastened to the rail.

[0014] By adopting the above technical solution, the stability of the overlapping part during the process of overlapping the bottom of the rail can be optimized, and the torsion angle of the limiting part of the fastening part can be increased to reduce the possibility that the limiting part cannot restrict the fastening bolt due to plastic deformation.

[0015] Optionally, it also includes positioning components that correspond one-to-one with the ends of the steel plates. The positioning components are used to position adjacent steel plates, and the two ends of the steel plates along the direction perpendicular to the rail are respectively connected to the positioning components.

[0016] By adopting the above technical solution, the positioning component can relatively easily position adjacent steel plates to determine the distance between them, further optimizing the convenience of use.

[0017] Optionally, the positioning component includes a positioning cable and a plurality of positioning parts fixedly connected to the positioning cable, wherein the plurality of positioning parts are equally spaced and the positioning parts are used to connect to the steel plate.

[0018] By adopting the above technical solution, the steel plate is connected to the positioning cable through the positioning part. This not only allows the load to be transferred through the tension of the positioning cable during use, but also allows the positioning cable to be pre-tensioned when laying the steel plate, so that the steel plate can be directly connected to the corresponding positioning part one by one; or the steel plate can be pre-connected to the positioning cable through the positioning part, and then the two positioning cables can be simultaneously tensioned by the winch to complete the laying of the steel plate. The subsequent laying of the steel rail can then be carried out, further optimizing the efficiency and convenience of construction.

[0019] Optionally, the positioning part includes a positioning seat and a positioning ring that is fixedly connected to the positioning cable. The positioning seat is fixedly connected to the steel plate, and the positioning seat has a positioning port for locking the positioning ring. The positioning ring is locked in the positioning port and fixedly connected to the positioning cable.

[0020] By adopting the above technical solution, when connecting the positioning part to the steel plate, it is only necessary to insert the positioning ring into the opening of the positioning seat.

[0021] Optionally, the positioning port extends through the positioning seat in a direction parallel to the rail, and the inner wall of the center of the positioning port is recessed outward or extends through the positioning seat corresponding to the position of the positioning ring.

[0022] By adopting the above technical solution, the sliding of the positioning ring relative to the positioning seat along the length of the rail can be restricted. This not only enables the positioning of the steel plate, but also allows the positioning cable to transfer the tension to other steel plates when the steel plate tends to move horizontally due to the movement of the bridge erecting machine. This reduces the possibility of relative sliding of the steel plates due to the steel plates not being fixed to the ballastless track bed.

[0023] Optionally, the positioning port is provided with a limiting component for restricting the positioning ring from sliding out. The limiting component includes a limiting pin and a limiting torsion spring. The limiting pin is hinged to the inner wall of the positioning port and is used to abut against the inner wall of the positioning port. The two ends of the limiting torsion spring are respectively connected to the limiting pin and the inner wall of the positioning port and are used to drive the limiting pin to abut against the positioning port.

[0024] By adopting the above technical solution, during the process of the positioning ring sliding into the positioning port, only the limiting pin needs to be rotated; and during use, since the positioning cable is taut, there is a tendency for the positioning cable to drive the positioning ring to move outward, inward, upward or downward. At this time, the limiting pin can abut against the inner wall of the positioning port under the action of the limiting torsion spring, preventing the positioning ring from disengaging from the positioning port.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. During the transport of the bridge erecting machine, the rails are laid directly on the ballastless track bed through steel plates, which can effectively reduce the height of the bridge erecting machine during transport. At the same time, the load can be transferred to the ballastless track bed relatively fully through the steel plates, so as to effectively reduce the possibility of damage to the ballastless track bed during the transport process.

[0027] 2. In addition, when laying multiple steel plates, the positioning and laying of the steel plates can be achieved directly by straightening the two positioning cables simultaneously or sequentially, without having to lay several steel plates on the ballastless track bed one after another, thus effectively optimizing the efficiency of laying rails. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0029] Figure 2 yes Figure 1 A magnified structural diagram of part A in the middle.

[0030] Figure 3 This is a schematic diagram of the structural changes of the fastener from uncompressed to compressed in the embodiments of this application.

[0031] Figure 4 This is a partial structural diagram of the positioning part in an embodiment of this application.

[0032] Figure 5 yes Figure 4 A magnified structural diagram of part B.

[0033] Explanation of reference numerals in the attached drawings: 1. Rail; 2. Steel plate; 3. Fastening assembly; 31. Fastener; 311. Fastening part; 312. Overlapping part; 313. Limiting part; 314. Abutting part; 32. Fastening bolt; 4. Positioning assembly; 41. Positioning cable; 42. Positioning part; 421. Positioning seat; 422. Positioning ring; 423. Positioning port; 424. Positioning tube; 43. Limiting component; 431. Limiting pin; 432. Limiting torsion spring. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0035] This application discloses a temporary track for beam erection at the entrance of a small-section tunnel on a single-track railway. (Refer to...) Figure 1 The temporary track includes two steel rails 1 and several steel plates 2. The steel plates 2 are distributed along the length of the steel rails 1 and are set perpendicular to each other. The thickness of the steel plates 2 is 10mm, but other thicknesses, such as 7mm, 8mm, 9mm, 15mm, etc., can be set according to the weight of the bridge erecting machine.

[0036] The steel plate 2 is placed at the bottom of the two steel rails 1, and the steel rails 1 are detachably connected to the top surface of the steel plate 2 by fastening assembly 3.

[0037] Reference Figure 1 and Figure 2 Specifically, the rail 1 has several fastening components 3 on both sides along its length, and the fastening components 3 on the same side of the rail 1 correspond one-to-one with the steel plate 2. The fastening components 3 include fasteners 31 and fastening bolts 32. The fasteners 31 have a rod-like structure and include a fastening portion 311 and two overlapping portions 312. The fastening portion 311 is arc-shaped, preferably C-shaped or U-shaped. In this embodiment, the fastening portion 311 is U-shaped with its opening facing away from the rail 1. The overlapping portions 312 are formed by bending the ends of the fastening portions 311 from the outside towards the rail 1, and the plane of the overlapping portion 312 when bent forms an angle with the fastening portion 311. Both the overlapping portions 312 and the fastening portions 311 are made of a flexible, bendable material, such as an alloy.

[0038] Fastening bolt 32 passes through the fastening part 311 and is threaded to the steel plate 2. The connection between the fastening part 311 and the overlapping part 312 abuts against the steel plate 2. The end of the fastening part 311 away from the opening abuts against the bottom edge of the rail 1 and presses the rail 1 against the steel plate 2. At the same time, the end of the overlapping part 312 is elastically bent toward the fastening part 311, causing the fastening part 311 to twist inward.

[0039] Reference Figure 1 and Figure 2 The two rods of the fastening part 311 are fixedly connected to the limiting part 313. The limiting part 313 has a block-shaped, rod-shaped or boss-shaped structure so that the fastening bolt 32 passes through the fastening part 311. When the rod of the fastening part 311 is twisted inward under the action of the overlapping part 312, the limiting part 313 can be located on the path of the fastening bolt 32 sliding out relative to the fastening part 311, so as to limit the possibility of the fastening part 311 sliding relative to the fastening bolt 32 due to vibration or external force.

[0040] At the same time, refer to Figure 2 and Figure 3During installation, the fastening part 311 and the overlapping part 312 are set at an angle, and the limiting part 313 and the path of the fastening bolt 32 sliding into the fastening part 311 are staggered. This allows for relatively convenient installation while ensuring that the fastening bolt 32 remains on the steel plate 2 for easy transport and reduces the possibility of the fastening bolt 32 being lost during transport. Finally, in this process, since the rail 1 is placed on the ballastless track bed via the steel plate 2, compared to the use of sleeper rails in the prior art, the height of the bridge erecting machine during transport via the rail 1 is effectively reduced. It can also bear the load generated during the transport of the bridge erecting machine and can be reused.

[0041] Reference Figure 2 and Figure 3 In addition, the end of the overlapping part 312 is bent into an abutment part 314 in the direction of the rail 1 to increase the torsion angle of the fastening part 311. This allows the limiting part 313 to directly restrict the fastening bolt 32, while also fastening the edge of the rail 1 during the process of the overlapping part 312 overlapping the rail 1, thus optimizing the stability of the fastening.

[0042] Of course, in other embodiments, the fastener 31 can also be configured as a U-shaped plate structure or a rod structure to facilitate installation.

[0043] Reference Figure 2 Meanwhile, in order to further facilitate the placement of several steel plates 2 on the temporary track bed, several steel plates 2 are equipped with positioning components 4 at both ends perpendicular to the rail 1, so as to further optimize the convenience of use.

[0044] The positioning component 4 includes a positioning cable 41 and several positioning parts 42. The positioning cable 41 extends along the distribution direction of several steel plates 2. The positioning part 42 includes a positioning seat 421 and a positioning ring 422. The positioning seat 421 is directly welded to or fixed to the steel plate 2 by bolts. The positioning cable 41 can be made of nylon rope or steel cable.

[0045] Reference Figure 2Positioning ring 422 has positioning tubes 424 protruding from both ends of the rail 1. Positioning seat 421 has a positioning opening 423 for engaging the positioning ring 422. The positioning opening 423 extends through the positioning seat 421 in a direction parallel to the rail 1, and the inner wall of the positioning opening 423 protrudes outward or the middle part extends through the positioning seat 421 in a direction perpendicular to the steel plate 2. The positioning ring 422 is engaged in the positioning opening 423. At the same time, the positioning tube 424 extends through the positioning opening 423 in a direction parallel to the rail 1, and the positioning ring 422 and the positioning tube 424 are sleeved and fixedly connected to the positioning cable 41. Thus, by straightening the positioning cable 41, the steel plate 2 can be directly positioned according to the preset position without the need for additional on-site measurement and positioning. In addition, when laying steel plates 2, one of the positioning cables 41 can be straightened first, and one end of the steel plates 2 can be distributed at equal intervals. Then, another positioning cable 41 can be straightened by a winch to lay several steel plates 2 on the ballastless track in the tunnel.

[0046] Of course, in other embodiments, the positioning component 4 includes a chain and several universal joints, one end of which is fixedly connected to the chain, and the other end of which is welded or fixedly connected to the steel plate 2 by bolts, and the several universal joints are evenly distributed on the chain.

[0047] Reference Figure 4 and Figure 5 Finally, in order to optimize the stability of the positioning ring 422 being engaged in the positioning port 423, a limiting member 43 is provided in the positioning port 423 to limit the possibility of the positioning ring 422 disengaging from the positioning port 423 during use or when the positioning cable 41 is subjected to tension.

[0048] The limiting component 43 includes a limiting pin 431 and a limiting torsion spring 432. One end of the limiting pin 431 is rotatably connected to the top wall of the positioning port 423 via a pin shaft, and the rotation plane of the limiting pin 431 is perpendicular to the rail 1. The limiting torsion spring 432 is sleeved on the pin shaft where the limiting pin 431 is located, and both ends of the limiting torsion spring 432 are respectively connected to the limiting pin 431 and the inner wall of the positioning port 423. This is to guide the limiting pin 431 to rotate from the inside of the positioning port 423 to the outside and abut against the inner wall of the positioning port 423, thereby limiting the positioning ring 422 within the positioning port 423. At the same time, the limiting pin 431 is located on the top wall of the positioning port 423, which can effectively reduce the difficulty of the positioning ring 422 sliding into the positioning port 423 and reduce the possibility of the limiting pin 431 obstructing the positioning ring 422.

[0049] The implementation principle of this application embodiment is as follows: In use, the rail 1 is laid directly on the ballastless track bed via the steel plate 2. Compared with the use of conventional sleeper rails, this effectively reduces the height of the bridge erecting machine when passing through and minimizes the impact on subsequent track laying. In addition, by using positioning cables 41 to connect several steel plates 2 to each other, the steel plates 2 can be restricted by adjacent steel plates 2 when bearing loads, thus optimizing the stability during use.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A temporary track for beam erection at the entrance of a small-section tunnel on a single-track railway, characterized in that: It includes two steel rails (1) and several steel plates (2) distributed along the length of the steel rails (1). The two steel rails (1) are parallel to each other, and the steel plates (2) are placed on the bottom of the two steel rails (1). The steel plates (2) are provided with fastening components (3) for fastening the steel rails (1) to the steel plates (2). The fastening assembly (3) includes a fastener (31) and a fastening bolt (32). The fastener (31) overlaps the bottom edge of the rail (1) and the steel plate (2). The fastening bolt (32) passes through the fastener (31) and presses the fastener (31) against the steel plate (2). The fastener (31) includes a snap-fit ​​part (311) with an arc-shaped rod structure and two overlapping parts (312). The overlapping parts (312) are bent from the end of the snap-fit ​​part (311) toward the direction away from the arc-shaped opening. The plane of the overlapping part (312) swinging during the bending process is set at an angle with the snap-fit ​​part (311). The fastening bolt (32) passes through the inside of the snap-fit ​​part (311) and is threaded to the steel plate (2). The snap-fit ​​part (311) and the overlapping parts (312) overlap the rail (1) and the steel plate (2). The fastening bolt (32) is provided with a limiting part (313) on the side facing the opening of the snap-fit ​​part (311). The limiting part (313) is fixedly connected to the snap-fit ​​part (311) and is used to swing toward the middle of the snap-fit ​​part (311) during the process of the snap-fit ​​part (311) being pressed into the overlapping part (312).

2. A temporary track for beam erection at the entrance of a small-section tunnel on a single-track railway according to claim 1, characterized in that: The overlapping part (312) is bent toward the side away from the limiting part (313) to form an abutting part (314), which is fastened to the rail (1).

3. A temporary track for beam erection at the entrance of a small-section tunnel on a single-track railway, as described in claim 1, is characterized in that: It also includes positioning components (4) that correspond one-to-one with the ends of the steel plates (2). The positioning components (4) are used to position the adjacent steel plates (2). The two ends of the steel plates (2) along the direction perpendicular to the rail (1) are respectively connected to the positioning components (4).

4. A temporary track for beam erection at the entrance of a small-section tunnel on a single-track railway, as described in claim 3, is characterized in that: The positioning component (4) includes a positioning cable (41) and a plurality of positioning parts (42) fixedly connected to the positioning cable (41). The plurality of positioning parts (42) are evenly distributed and the positioning parts (42) are used to connect the steel plate (2).

5. A temporary track for beam erection at the entrance of a small-section tunnel on a single-track railway, as described in claim 4, characterized in that: The positioning part (42) includes a positioning seat (421) and a positioning ring (422) that is sleeved and fixedly connected to the positioning cable (41). The positioning seat (421) is fixedly connected to the steel plate (2), and the positioning seat (421) has a positioning port (423) for locking the positioning ring (422). The positioning ring (422) is locked in the positioning port (423) and fixedly connected to the positioning cable (41).

6. A temporary track for beam erection at the entrance of a small-section tunnel on a single-track railway, as described in claim 5, is characterized in that: The positioning port (423) penetrates the positioning seat (421) in a direction parallel to the rail (1), and the inner wall of the middle part of the positioning port (423) is recessed outward or penetrates the positioning seat (421) corresponding to the position of the positioning ring (422).

7. A temporary track for beam erection at the entrance of a small-section tunnel on a single-track railway, as described in claim 6, is characterized in that: The positioning port (423) is provided with a limiting member (43) for limiting the sliding out of the positioning ring (422). The limiting member (43) includes a limiting pin (431) and a limiting torsion spring (432). The limiting pin (431) is hinged to the inner wall of the positioning port (423) and is used to abut against the inner wall of the positioning port (423). The two ends of the limiting torsion spring (432) are respectively connected to the limiting pin (431) and the inner wall of the positioning port (423) and are used to drive the limiting pin (431) to abut against the positioning port (423).

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