Railway bridge beam end telescopic device

Abstract

The utility model relates to the technical field of beam end telescopic devices, and provides a railway bridge beam end telescopic device which aims at solving the problems that the height of a longitudinal beam borne by an existing deck type railway telescopic device is limited due to track limitation, the range of adapting to bridge telescopic displacement is limited, and a through type railway telescopic device is not matched with the track rigidity of ballast lines on the two sides. Comprising fixed sleepers and movable sleepers, the fixed sleepers are installed at the beam ends on the two sides of a beam seam, and the movable sleepers are arranged at the beam seam; longitudinal sliding beams are arranged below the sleeper ends of the fixed sleepers and the movable sleepers, the middles of the longitudinal sliding beams are fixedly connected with the movable sleepers, and the two ends of the longitudinal sliding beams are in sliding connection with the fixed sleepers on the two sides of the beam seam respectively. The longitudinal sliding beam is arranged below the sleeper end of the sleeper, the space of the lower portion of the sleeper is reasonably utilized, and the problem that the deck type railway telescopic device is limited in bridge telescopic displacement adapting range due to the fact that the height of the rail limit bearing longitudinal beam is limited is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to beam end telescopic device technical field, specifically, relate to a railway bridge beam end telescopic device. BACKGROUND

[0002] The gap between adjacent bridges or the bridge and the abutment changes with the bridge expansion displacement under the action of environmental temperature change and train load, in order to ensure the continuity of the railway track at the beam end gap, the bridge expansion device is arranged at the beam end of the bridge, the horizontal and angular displacement changes of the beam end of the bridge are adapted, the strength, stiffness and reliability are good, the railway track is continuously supported at the beam end gap, and the safety and stability of the railway train passing through the beam end gap of the bridge are ensured.

[0003] At present, the beam end telescopic device structure type mainly has two kinds of top bearing type and bottom bearing type, and the two kinds of structures have respective advantages and disadvantages. Due to the track boundary, the height of the bearing longitudinal beam of the top bearing type railway telescopic device is limited, and the bridge expansion displacement range is limited; the structural stiffness of the bottom bearing type railway telescopic device is large, can adapt to a larger bridge expansion displacement range, and still has problems such as the track stiffness of the telescopic device region and the ballast track on both sides not matching, and large machine tamping operation being unable to be carried out.

[0004] Affected by factors such as railway transportation demand, material innovation, construction technology improvement and environmental protection consciousness enhancement, the span of the newly-built railway large displacement bridge is larger and larger, the demand for the bridge beam end telescopic device is higher and higher, how to solve the problems existing in the existing beam end telescopic device and meet the new demand of the market becomes a technical problem that needs to be solved for the railway large displacement bridge telescopic device. INVENTION CONTENTS

[0005] The utility model aims at providing a railway bridge beam end telescopic device, to solve the problem that the height of the bearing longitudinal beam of the existing top bearing type railway telescopic device is limited due to the track boundary, the bridge expansion displacement range is limited, and the track stiffness of the bottom bearing type railway telescopic device and the ballast track on both sides is not matched.

[0006] The utility model is realized by adopting the following technical scheme:

[0007] The utility model provides a railway bridge beam end telescopic device, including fixed rail sleeper and movable rail sleeper, the fixed rail sleeper is installed on the beam end on both sides of the beam joint, the movable rail sleeper is arranged at the beam joint,

[0008] The lower part of the sleeper end of the fixed rail sleeper and the movable rail sleeper is arranged with the longitudinal sliding beam, the middle part of the longitudinal sliding beam is fixedly connected with the movable rail sleeper, and the two ends of the longitudinal sliding beam are slidably connected with the fixed rail sleeper on both sides of the beam joint.

[0009] The utility model discloses a railway bridge beam end expansion device, longitudinal slip beam is arranged below the sleeper end, and the lower space of sleeper is utilized reasonably, and the lower space of sleeper is larger, provides the space of installation, expansion for longitudinal slip beam, adopts this structure, overcomes the problem that the upper bearing type railway expansion device is limited in height because of track limit bearing longitudinal beam, leads to its adaptation bridge expansion displacement range is limited, simultaneously, because when actually using, the track is installed on the sleeper, the railway bridge beam end expansion device of the utility model is directly connected with the track, directly bears the vertical load of train, and the lower bearing type railway expansion device is installed at the bottom of bridge, is far away from the track, and the load is different through the bridge surface transmission, the railway bridge beam end expansion device of the utility model avoids the problem that the lower bearing type railway expansion device and the track stiffness of ballast track on both sides are not matched simultaneously.

[0010] And the middle part of the longitudinal slip beam is fixedly connected with the movable sleeper, and the two ends of the longitudinal slip beam are slidably connected with the fixed sleepers on both sides of the beam joint, the structure form of middle fixed and both ends displacement is adopted, the movable sleeper close to the center of the beam joint is relatively fixed with the longitudinal slip beam, the bearing position and length of the longitudinal slip beam at the beam ends of the two sides of the bridge are kept consistent, and the bearing safety of the expansion device is improved.

[0011] As a preferred technical scheme:

[0012] A plurality of the fixed sleepers and the movable sleepers are arranged, a connecting rod mechanism is connected between the two adjacent movable sleepers, and between the movable sleepers at both ends and the adjacent fixed sleepers, and the connecting rod mechanism is hinged with the movable sleepers and the fixed sleepers.

[0013] The connecting rod mechanism is used for controlling the gap of the movable sleepers and ensuring the uniformity of the sleeper gap.

[0014] As a preferred technical scheme:

[0015] The movable sleepers and the fixed sleepers are all made of steel sleepers.

[0016] As a preferred technical scheme:

[0017] The sleeper end of the fixed sleeper is provided with a longitudinal beam sliding fastener, and the longitudinal slip beam is slidably connected with the longitudinal beam sliding fastener.

[0018] The longitudinal slip beam is connected with the movable sleepers through longitudinal beam fixing fasteners.

[0019] As a preferred technical scheme:

[0020] The upper part of the longitudinal beam sliding fastener is fixedly connected with the fixed rail sleeper, and the lower part of the longitudinal beam sliding fastener is formed with a sliding space, and the longitudinal sliding beam is located in the sliding space and is in sliding connection with the longitudinal beam sliding fastener.

[0021] As a preferred technical solution:

[0022] The longitudinal beam sliding fastener comprises two oppositely arranged L-shaped sliding seats which are connected to the lower part of the fixed rail sleeper end by bolts, and a sliding space is formed between the two L-shaped sliding seats, and the longitudinal sliding beam is located in the sliding space and is in sliding connection with the L-shaped sliding seat. The longitudinal beam sliding fastener is not limited to the structure described above, and other structures capable of achieving sliding connection with the longitudinal sliding beam can also be used.

[0023] As a preferred technical solution:

[0024] A limiting boss is arranged at the middle position of the longitudinal sliding beam, and the limiting boss is fixedly connected with the movable rail sleeper at the middle position through the longitudinal beam fixed fastener.

[0025] As a preferred technical solution:

[0026] The plurality of fixed rail sleepers on the same side beam body are connected by a connecting plate.

[0027] The connecting plate connects the plurality of fixed rail sleepers on the same side beam body as a whole, and simultaneously transversely fixes and restricts the fixed rail sleepers.

[0028] As a preferred technical solution:

[0029] Two rails are installed above the fixed rail sleeper and the movable rail sleeper, the two rails are arranged in parallel with each other, and the rails are connected with the fixed rail sleeper and the movable rail sleeper through fasteners.

[0030] As a preferred technical solution:

[0031] In the ballastless track system, the middle part of the fixed rail sleeper is fixedly connected with the track slab, and the two ends of the fixed rail sleeper are suspended;

[0032] In the ballasted track system, the fixed rail sleeper is connected with the beam body through a ballast stopping plate, and the ballast stopping plate is fixedly installed at the beam end.

[0033] As a preferred technical solution:

[0034] The ballast stopping plate comprises a transverse ballast stopping plate and a longitudinal ballast stopping plate, the length direction of the transverse ballast stopping plate is perpendicular to the line direction, the two ends of the transverse ballast stopping plate are respectively connected with the longitudinal ballast stopping plate, and the length direction of the longitudinal ballast stopping plate is along the line direction.

[0035] The longitudinal ballast retaining plate is provided with a plurality of mounting interfaces, and the two ends of the fixed rail tie are respectively mounted in the corresponding mounting interfaces on the two longitudinal ballast retaining plates on the same side beam body.

[0036] The longitudinal sliding beam is arranged outside the longitudinal ballast retaining plate.

[0037] As a preferred technical solution:

[0038] The longitudinal ballast retaining plate adopts a semi-open structure, and the longitudinal sliding beam is located in the semi-open structure.

[0039] The longitudinal ballast retaining plate adopts a semi-open structure, which provides a mounting and telescoping space for the longitudinal sliding beam, facilitates installation, and can adapt to large displacement telescoping of the bridge. At the same time, the semi-open structure also reserves a space for inspection and maintenance of the longitudinal sliding beam, facilitating later inspection and maintenance.

[0040] As a preferred technical solution:

[0041] The longitudinal ballast retaining plate comprises a bottom plate, a first side plate and a second side plate, the first side plate and the second side plate are arranged perpendicular to the plate surface of the bottom plate, and the first side plate and the second side plate are perpendicular to each other, one end of the first side plate is connected with the second side plate, and the other end is connected with the transverse ballast retaining plate, and the bottom plate, the first side plate and the second side plate form the semi-open structure.

[0042] As a preferred technical solution:

[0043] The mounting interface is a U-shaped opening, and the U-shaped opening is formed in the upper portion of the longitudinal ballast retaining plate.

[0044] As a preferred technical solution:

[0045] The U-shaped opening is arranged on the first side plate.

[0046] As a preferred technical solution:

[0047] The fixed rail tie adjacent to the transverse ballast retaining plate is connected with the transverse ballast retaining plate through a fixed constraint structure, and the fixed constraint structure longitudinally fixes and constrains the fixed rail tie.

[0048] As a preferred technical solution:

[0049] The two ends of the fixed rail tie are provided with a floating ballast retaining structure, and the floating ballast retaining structure cooperates with the longitudinal ballast retaining plate to avoid the ballast from falling off from the mounting interface on the longitudinal ballast retaining plate.

[0050] As a preferred technical solution:

[0051] The floating ballast retaining structure adopts floating ballast retaining plates, and each of the two ends of each fixed sleeper is connected with the floating ballast retaining plate, and the floating ballast retaining plate is in sliding connection with the outer side of the longitudinal ballast retaining plate.

[0052] As a preferred technical solution:

[0053] The fixed sleeper and the movable sleeper both adopt an I-shaped rolled or welded steel structure, thereby enhancing the load-bearing safety of the expansion device and improving the versatility and practicality of the structure.

[0054] In summary, due to the adoption of the above technical solution, the railway bridge end expansion device has the following advantages:

[0055] 1. The railway bridge end expansion device rationally utilizes the lower space of the sleeper, and the larger lower space of the sleeper provides installation and expansion space for the longitudinal sliding beam.

[0056] 2. The middle part of the longitudinal sliding beam is fixedly connected with the movable sleeper, and the two ends of the longitudinal sliding beam are in sliding connection with the fixed sleepers on both sides of the beam joint.

[0057] 3. The railway bridge end expansion device can be applied to ballasted and non-ballasted track systems.

[0058] 4. The longitudinal ballast board adopts a semi-open structure, provides a mounting and telescoping space for the longitudinal sliding beam, is convenient to install, can adapt to large displacement telescoping of the bridge, and also reserves a space for checking and repairing the longitudinal sliding beam, facilitating later checking and repairing.

[0059] 5. The utility model discloses a floating ballast board is provided with on both ends of the fixed rail tie, and the floating ballast board is slidably connected with the outside of the longitudinal ballast board, is used for closing the U-shaped opening on the longitudinal ballast board, avoids the ballast from falling from the U-shaped opening.

[0060] 6. The fixed rail tie and the movable rail tie adopt the I-shaped rolled or welded steel structure, enhance the bearing safety of the telescoping device, and also improve the universality and practicality of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0061] Figure 1 It is the installation schematic drawing of the railway bridge beam end telescoping device of example 1.

[0062] Figure 2 It is the front view of Figure 1 .

[0063] Figure 3 It is the installation schematic drawing of the fixed steel tie of the utility model.

[0064] Figure 4 It is the installation schematic drawing of the ballast board of the utility model.

[0065] Figure 5 It is the structural schematic drawing of the longitudinal sliding beam of the utility model.

[0066] Figure 6 It is the installation schematic drawing of the railway bridge beam end telescoping device of example 2.

[0067] Figure 7 It is the front view of Figure 6 .

[0068] Figure 8 It is the plan view of Figure 6 .

[0069] Figure legend: 1-fixed steel tie, 2-linkage mechanism, 3-movable steel tie, 4-coupling plate, 5-longitudinal sliding beam, 501-limiting boss, 6-longitudinal beam sliding fastener, 7-longitudinal ballast board, 701-bottom plate, 702-first side plate, 703-second side plate, 8-steel rail, 9-fastener, 10-transverse ballast board, 11-longitudinal beam fixed fastener, 12-floating ballast board. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings below, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0071] Embodiment 1

[0072] As Figures 1-5 shown, the utility model discloses a railway bridge beam end expansion joint, including fixed sleeper 1, connecting rod mechanism 2, movable sleeper 3, coupling plate 4, longitudinal sliding beam 5, longitudinal beam sliding fastener 6 and longitudinal beam fixed fastener 11.

[0073] The fixed sleeper 1 is installed on the beam end of both sides of the beam joint, the movable sleeper 3 is arranged at the beam joint, the length direction of the fixed sleeper 1 and the movable sleeper 3 is perpendicular to the line direction.

[0074] The fixed sleeper 1 and the movable sleeper 3 are provided with multiple, the connecting rod mechanism 2 is connected between the two adjacent movable sleepers 3, the movable sleeper 3 at both ends and the adjacent fixed sleeper 1, the connecting rod mechanism 2 is hinged with the movable sleeper 3 and the fixed sleeper 1 through bolt, the connecting rod mechanism 2 is used for controlling the gap of the movable sleeper 3, and the uniformity of sleeper gap is guaranteed.In the embodiment, the connecting rod mechanism 2 is arranged above the movable sleeper 3 and the fixed sleeper 1.

[0075] The multiple fixed sleepers 1 on the same side beam body are connected through a coupling plate 4, the coupling plate 4 is arranged on the top surface of the fixed sleeper 1, and the coupling plate 4 connects the multiple fixed sleepers 1 at the same beam end into a whole.In the embodiment, the end of the multiple fixed sleepers 1 at the same beam end is connected and fixed through the coupling plate 4.

[0076] The longitudinal sliding beam 5 is arranged below the sleeper end of the fixed sleeper 1 and the movable sleeper 3, and the length direction of the longitudinal sliding beam 5 is along the line direction.

[0077] The middle part of the longitudinal sliding beam 5 is fixedly connected with the movable sleeper 3, and the two ends of the longitudinal sliding beam 5 are slidably connected with the fixed sleepers 1 on both sides of the beam joint respectively.

[0078] In the embodiment, the longitudinal sliding beam 5 is arranged above the beam joint, and the two ends of the longitudinal sliding beam 5 are connected with the fixed steel sleeper 1 on both sides of the beam joint through the longitudinal beam sliding fastener 6. The longitudinal sliding beam 5 is arranged below the end of the fixed steel sleeper 1, and the two ends of the fixed steel sleeper 1 are slidingly connected with the corresponding longitudinal sliding beam 5. Specifically, the longitudinal sliding beam 5 is connected with the fixed steel sleeper 1 through the longitudinal beam sliding fastener 6. The longitudinal beam sliding fastener 6 is installed on the fixed steel sleeper 1 through bolts. The longitudinal sliding beam 5 is slidingly connected with the longitudinal beam sliding fastener 6. The longitudinal sliding beam 5 and the longitudinal beam sliding fastener 6 form a sliding pair, and can slide relative to each other, so that the fixed steel sleeper 1 and the longitudinal sliding beam 5 can move relative to each other. Through the above structure, the connecting plate 4 and the longitudinal sliding beam 5 transversely fix and constrain the fixed steel sleeper 1.

[0079] In the embodiment, the longitudinal beam sliding fastener 6 includes two oppositely arranged L-shaped sliding seats. The L-shaped sliding seats are connected below the end of the fixed steel sleeper 1 through bolts. A sliding space is formed between the two L-shaped sliding seats. The longitudinal sliding beam 5 is located in the sliding space and is slidingly connected with the L-shaped sliding seat. The longitudinal beam sliding fastener 6 is not limited to the above structure, and other structures that can achieve sliding connection with the longitudinal sliding beam 5 can also be used.

[0080] In the embodiment, a plurality of movable steel sleepers 3 are arranged at the bridge beam end joint gap (i.e., the beam joint), and each movable steel sleeper 3 is fixedly connected with the longitudinal sliding beam 5. A limiting boss 501 is arranged at the middle position of the longitudinal sliding beam 5, and the limiting boss 501 is fixedly connected with the movable steel sleeper 3 at the middle position through the longitudinal beam fixing fastener 11. The longitudinal beam fixing fastener 11 can be any fastener that can achieve fixed connection between the longitudinal sliding beam 5 and the movable steel sleeper 3.

[0081] Two steel rails 8 are installed above the fixed steel sleeper 1 and the movable steel sleeper 3. The two steel rails 8 are arranged in parallel with each other, and the steel rails 8 are connected with the fixed steel sleeper 1 and the movable steel sleeper 3 through fasteners 9.

[0082] In the embodiment, the fixed steel sleeper 1, the movable steel sleeper 3, and the longitudinal sliding beam 5 all adopt an I-shaped structure. The fixed steel sleeper 1 and the movable steel sleeper 3 adopt an I-shaped rolled or welded steel structure, which enhances the load safety of the expansion device and improves the universality and practicality of the structure.

[0083] The utility model discloses a railway bridge beam end expansion device, longitudinal slip beam 5 is arranged below the sleeper end, reasonably utilizes the sleeper lower space, and the larger sleeper lower space provides the installation, expansion space of longitudinal slip beam 5, adopt this structure, overcome the problem that the upper bearing type railway expansion device is limited to the height of the bearing longitudinal beam of track gauge, and the bridge expansion displacement range of its adaptation is limited, the utility model discloses a railway bridge beam end expansion device avoids the problem that the lower bearing type railway expansion device and the track stiffness of ballast track on both sides are not matched.

[0084] The utility model discloses a railway bridge beam end expansion device adopts the structure form of middle fixed, both end displacement, and the movable steel sleeper 3 close to the beam joint center is fixed with longitudinal slip beam 5, makes longitudinal slip beam 5 in the bearing position, length etc. of both side bridge beam end keep consistent, improved the bearing safety of expansion device.

[0085] The utility model discloses a railway bridge beam end expansion device can be applicable to ballast, ballastless track system.

[0086] As Figure 1 And Figure 2 As shown in ballast track system, the fixed steel sleeper 1 is connected with the beam body through the ballast baffle, and the ballast baffle is fixedly installed on the beam end, and the fixed steel sleeper 1 is floated on the ballast through the ballast baffle.

[0087] In the embodiment, the ballast baffle includes longitudinal ballast baffle 7 and transverse ballast baffle 10.

[0088] The transverse ballast baffle 10 is arranged on the beam end on both sides of the beam joint, the length direction of the transverse ballast baffle 10 is perpendicular to the line direction, and the two ends of the transverse ballast baffle 10 are respectively connected with the longitudinal ballast baffles 7, the length direction of the longitudinal ballast baffles 7 is along the line direction, and the two longitudinal ballast baffles 7 at the same beam end are oppositely arranged. In the embodiment, the transverse ballast baffle 10 and the longitudinal ballast baffles 7 are anchored at the bridge beam end.

[0089] The upper part of the longitudinal ballast baffle 7 is provided with a plurality of U-shaped openings at intervals, which are used as mounting interfaces of the fixed steel sleeper 1. The fixed steel sleeper 1 is mounted in the U-shaped openings, and the two ends of the fixed steel sleeper 1 are respectively arranged in the corresponding U-shaped openings of the two longitudinal ballast baffles 7, the fixed steel sleeper 1 is floated on the ballast through the longitudinal ballast baffles 7, and the longitudinal ballast baffles 7 longitudinally constrain the fixed steel sleeper 1, but do not affect the vertical movement of the fixed steel sleeper 1. The longitudinal slip beam 5 below the sleeper end is arranged outside the longitudinal ballast baffles 7.

[0090] The fixed steel sleeper 1 adjacent to the transverse ballast baffle 10 is connected with the transverse ballast baffle 10 through a fixed constraint structure, and the fixed constraint structure longitudinally fixes and constrains the fixed steel sleeper 1.

[0091] In the embodiment, the longitudinal ballast retaining plate 7 comprises a bottom plate 701, a first side plate 702 and a second side plate 703, the first side plate 702 and the second side plate 703 are arranged perpendicularly to the plate surface of the bottom plate 701, and the first side plate 702 and the second side plate 703 are perpendicular to each other, one end of the first side plate 702 is connected with the second side plate 703, the other end is connected with the transverse ballast retaining plate 10, and the U-shaped opening is arranged on the first side plate 702. The bottom plate 701, the first side plate 702 and the second side plate 703 form a semi-open structure, and the longitudinal sliding beam 5 is located in the semi-open structure. The longitudinal ballast retaining plate 7 adopts a semi-open structure to provide a free expansion space for the longitudinal sliding beam 5, thereby ensuring the free expansion function of the expansion device with the change of the beam gap, and facilitating the inspection and maintenance of the expansion device longitudinal sliding beam 5.

[0092] Further, the two ends of each fixed steel sleeper 1 are provided with a floating ballast retaining structure for avoiding the falling of ballast from the U-shaped opening of the longitudinal ballast retaining plate 7. In the embodiment, the floating ballast retaining structure adopts a floating ballast retaining plate 12, and the floating ballast retaining plate 12 is connected with the longitudinal ballast retaining plate 7 at the lower part of the two ends of each fixed steel sleeper 1 in a sliding manner.

[0093] Embodiment 2

[0094] As shown in Figures 6-8 The embodiment provides a railway bridge beam end expansion device, which is different from the embodiment 1 in that, in the ballastless track system, the middle part of the fixed steel sleeper 1 is fixedly connected with a track plate, and the two ends of the fixed steel sleeper 1 are suspended; and the longitudinal sliding beam 5 is arranged below the sleeper end of the fixed steel sleeper 1 and the movable steel sleeper 3, thereby reasonably utilizing the space below the sleeper and solving the problem that the existing deck-type railway expansion device is limited in height of a bearing longitudinal beam due to track gauge, and is limited in the range of bridge expansion displacement.

[0095] The above only describes the preferred embodiments of the utility model, and is not used for limiting the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A railway bridge beam end expansion device, characterized in that: fixed sleepers and movable sleepers are arranged, the fixed sleepers are arranged on the beam ends on both sides of the beam joint, and the movable sleepers are arranged at the beam joint; longitudinal sliding beams are arranged below the sleeper ends of the fixed sleepers and the movable sleepers, the middle part of the longitudinal sliding beam is fixedly connected with the movable sleeper, and the two ends of the longitudinal sliding beam are respectively slidably connected with the fixed sleepers on both sides of the beam joint.

2. The railway bridge beam end expansion device according to claim 1, characterized in that: a plurality of fixed sleepers and movable sleepers are arranged, a connecting rod mechanism is connected between adjacent two movable sleepers and between the movable sleeper at both ends and its adjacent fixed sleeper, and the connecting rod mechanism is hinged with the movable sleeper and the fixed sleeper.

3. The railway bridge beam end expansion device according to claim 1, characterized in that: longitudinal beam sliding fasteners are arranged on the sleeper ends of the fixed sleepers, the longitudinal sliding beams are slidably connected with the longitudinal beam sliding fasteners; and the longitudinal sliding beams are connected with the movable sleepers through longitudinal beam fixed fasteners.

4. The railway bridge beam end expansion device according to claim 3, characterized in that: the upper part of the longitudinal beam sliding fastener is fixedly connected with the fixed sleeper, and the lower part of the longitudinal beam sliding fastener is formed with a sliding space, and the longitudinal sliding beam is slidably connected with the longitudinal beam sliding fastener in the sliding space.

5. The railway bridge beam end expansion device according to claim 2, characterized in that: a plurality of fixed sleepers on the same side beam body are connected through a connecting plate.

6. The railway bridge beam end expansion device according to claim 1, characterized in that: in a ballastless track system, the middle part of the fixed sleeper is fixedly connected with a track slab, and the two ends of the fixed sleeper are suspended; and in a ballasted track system, the fixed sleeper is connected with a beam body through a ballast stopping plate, and the ballast stopping plate is fixedly arranged on the beam end.

7. The railway bridge beam end expansion device according to claim 6, characterized in that: the ballast stopping plate comprises a transverse ballast stopping plate and a longitudinal ballast stopping plate, the length direction of the transverse ballast stopping plate is perpendicular to the line direction, the two ends of the transverse ballast stopping plate are respectively connected with the longitudinal ballast stopping plates, and the length direction of the longitudinal ballast stopping plate is along the line direction; a plurality of mounting interfaces are arranged on the longitudinal ballast stopping plate, the two ends of the fixed sleeper are respectively arranged in the corresponding mounting interfaces of the two longitudinal ballast stopping plates on the same side beam body; and the longitudinal sliding beam is arranged outside the longitudinal ballast stopping plate.

8. The railway bridge beam end expansion device according to claim 7, characterized in that: the longitudinal ballast stopping plate adopts a semi-open structure, and the longitudinal sliding beam is located in the semi-open structure.

9. The railway bridge beam end expansion device according to claim 8, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The longitudinal ballast retaining plate comprises a bottom plate, a first side plate and a second side plate, the first side plate and the second side plate are arranged perpendicularly to the plate surface of the bottom plate, and the first side plate and the second side plate are perpendicular to each other, one end of the first side plate is connected with the second side plate, and the other end is connected with the transverse ballast retaining plate, and the bottom plate, the first side plate and the second side plate form the semi-open structure.

10. Railway bridge end expansion joint according to any of claims 7-9, characterized in that: Both ends of the fixed sleeper are provided with a floating ballast retaining structure, and the floating ballast retaining structure cooperates with the longitudinal ballast retaining plate to avoid the falling of ballast from the mounting interface on the longitudinal ballast retaining plate.

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