Beam end large-displacement telescoping and track temperature adjusting integrated device of magnetic levitation traffic bridge

Abstract

The invention provides a beam end large-displacement stretching and retracting and rail temperature adjusting integrated device of a maglev traffic bridge. The beam end large-displacement stretching and retracting and rail temperature adjusting integrated device comprises a first fixed F rail section, a second fixed F rail section, an F rail length adjusting section and a steel sleeper distance adjusting device. The second fixed F rail section and the F rail length adjusting section are sequentially connected to the second beam body, the first fixed F rail section is arranged on the first beam body and extends to the second beam body across the beam seam to be connected with the F rail length adjusting section, and the F rail length adjusting section can adjust the length. The steel sleeper distance adjusting device is arranged at a beam seam between the first beam body and the second beam body and located below the first fixed F rail section, the steel sleeper distance adjusting device comprises a plurality of sliding steel sleepers arranged at intervals in the longitudinal bridge direction, and the sliding steel sleepers are in sliding connection with the first fixed F rail section above the sliding steel sleepers. And the distance between the adjacent sliding steel sleepers can be adjusted along with the change of the beam seam. The problem of telescopic displacement of the F rail and the steel sleeper caused by large displacement of the beam body is solved, and the system is simpler and more stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of maglev rail transit, in particular to a large displacement expansion and contraction of a beam end of a maglev transit bridge and a track temperature regulation integrated device. BACKGROUND

[0002] In recent years, large-span bridge structures for crossing rivers, valleys, existing lines and other working conditions frequently appear in the field of medium and low speed maglev transit. The longitudinal expansion and contraction deformation of large-span bridges within the design temperature range can reach 600mm or more. However, the maximum expansion and contraction of conventional medium and low speed maglev transit jointed track (such as I-type, II-type and III-type joints) is only 80mm, which cannot meet the demand. The beam end expansion device and rail expansion regulator used in high-speed rail, urban rail transit and intercity rail are designed based on wheel-rail system. The wheel-rail system relies on the contact and friction between the wheel and the rail to realize the operation of the train. However, the medium and low speed maglev transit utilizes electromagnetic force to make the train hover above the track to realize non-contact operation. The two different operation principles and track linear precision determine that the beam end expansion device and rail expansion regulator of wheel-rail transit cannot be directly applied to medium and low speed maglev transit system.

[0003] A longitudinal beam sliding device for large displacement expansion and contraction of medium and low speed maglev bridge is disclosed in Chinese patent with application number CN201811141806.7. The longitudinal beam sliding device is used to absorb and compensate the large displacement expansion and contraction. However, since the track sub-unit includes both F-rail and cross beam (i.e. steel sleeper), and the joint form of F-rail can handle smaller deformation gap, handling large displacement deformation gap will result in a large number of track sub-units, making the whole system bulky and unstable, and the cost will also become high.

[0004] A large displacement track expansion and contraction device for beam end of medium and low speed maglev large-span bridge is disclosed in Chinese patent application with application number CN202311014914.9. The principle of the device is similar to the aforementioned large displacement expansion and contraction device for beam end of medium and low speed maglev track. The track structure unit is used to replace the track sub-unit. Although the stability of the track structure unit is stronger than that of the track sub-unit, the structure of the track structure unit is more complex, and a large number of track structure units will further make the system bulky and unstable.

[0005] In summary, there is an urgent need for a large displacement expansion and contraction of a beam end of a maglev transit bridge and a track temperature regulation integrated device to solve the problems existing in the prior art. SUMMARY

[0006] The application aims to provide a large displacement telescopic and track temperature adjusting integrated device for the beam end of a magnetic levitation traffic bridge, and aims to solve the problems of system bulkiness, poor stability and high cost of the large displacement telescopic device of the existing medium and low speed magnetic levitation bridge. A large displacement telescopic and track temperature adjusting integrated device for the beam end of a magnetic levitation traffic bridge, comprising a fixed F rail section one, a fixed F rail section two, an F rail length adjusting section and a steel sleeper spacing adjusting device. The fixed F rail section two and the F rail length adjusting section are sequentially connected on the beam body two, the fixed F rail section one is arranged on the beam body one and extends across the beam joint to the beam body two and is connected with the F rail length adjusting section, and the F rail length adjusting section can be adjusted in length. The steel sleeper spacing adjusting device is arranged at the beam joint between the beam body one and the beam body two and below the fixed F rail section one, the steel sleeper spacing adjusting device comprises a plurality of sliding steel sleepers which are spaced apart along the longitudinal bridge direction, the end sliding steel sleeper close to the beam body one is in a relatively fixed state with the beam body one, and the end sliding steel sleeper close to the beam body two is in a relatively fixed state with the beam body two; the sliding steel sleeper is slidingly connected with the fixed F rail section one above it, and the adjacent sliding steel sleepers can adjust the spacing with the change of the beam joint.

[0007] Preferably, the steel sleeper spacing adjusting device further comprises a longitudinal beam and a scissors linkage, both ends of the longitudinal beam are arranged on the beam body one and the beam body two respectively, one end is fixedly arranged, and the other end is slidingly arranged; a plurality of sliding steel sleepers are slidingly arranged on the longitudinal beam and connected through the scissors linkage between adjacent sliding steel sleepers.

[0008] Preferably, the fixed steel sleeper on the beam body two for supporting the fixed F rail section one and the sliding steel sleeper are both provided with a sliding groove seat one, the part of the fixed F rail section one on the beam joint and the beam body two is provided with a sliding rail one on the bottom surface, and the sliding rail one is slidingly arranged in the sliding groove seat one.

[0009] Preferably, the beam body one is provided with a mounting position one, the beam body two is provided with a mounting position two, the mounting position one is provided with a fixed support, the mounting position two is provided with a sliding support which can slide in a sliding rail base, and one end of the longitudinal beam is connected with the fixed support and the other end is connected with the sliding support.

[0010] Preferably, the end sliding steel sleeper close to the beam body one and the fixed steel sleeper on the beam body one are connected through a connecting piece, and the end sliding steel sleeper close to the beam body two and the fixed steel sleeper on the beam body two are connected through a connecting piece.

[0011] Preferably, at least one fixed steel sleeper in the longitudinal bridge direction in the mounting position two supports the fixed F rail section one, and the fixed steel sleeper in the mounting position two is a type I steel sleeper.

[0012] Preferably, the two closest to the second mounting position two fixed sleepers, the second mounting position in each type I sleeper and the end of the beam two slip sleepers are sequentially connected by connecting pieces in the longitudinal direction of the bridge.

[0013] Preferably, the scissors linkage includes a plurality of connecting rods, two connecting rods are hinged to the pin shaft on a slip sleeper to form a cross structure, and the ends of the two connecting rods on the same side of a slip sleeper are hinged to the ends of the two connecting rods on the same side of the adjacent slip sleeper.

[0014] Preferably, the F rail length adjustment section includes a plurality of movable F rails arranged in sequence in the longitudinal direction of the bridge, a plurality of fixed sleepers are arranged in sequence in the longitudinal direction of the bridge below the F rail length adjustment section, the movable F rails are slidingly connected with the fixed sleepers below them, the adjacent movable F rails are connected in a mortise and tenon structure, and the mortise and tenon structure has an active gap in the longitudinal direction of the bridge.

[0015] Preferably, the fixed sleepers below the F rail length adjustment section are provided with a second sliding groove seat, and the bottom surface of each movable F rail is provided with a second sliding rail equal in length to the movable F rail, and the second sliding rail is slidingly arranged in the second sliding groove seat.

[0016] The technical scheme of the present application has the following beneficial effects: The integrated device of the present application separates the expansion adjustment of the F rail and the sleeper, wherein the sleeper spacing adjustment device solves the problem of adjusting the spacing of the slip sleepers following the change of the beam gap with a simple and stable structure, the sliding rail structure and the mortise and tenon structure solve the problem of adjusting the expansion of the F rail following the change of the beam gap, and the simple and repeated structure realized by the mortise and tenon structure meets the requirement of small deformation gap of the F rail but large number. The integrated device of the present application solves the expansion displacement of the F rail and the sleeper caused by the large displacement of the beam body, and makes the system more simple and stable.

[0017] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present application, the schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings: Figure 1 is a front view of the integrated device of the present application; Figure 2is the top view of the integrated device of the present application; Figure 3 is Figure 1 is the front view of the steel sleeper spacing adjustment device; Figure 4 is Figure 3 is the top view of the steel sleeper spacing adjustment device; Figure 5 is Figure 3 is the sectional view at A-A; Figure 6 is Figure 3 is the sectional view at B-B; Figure 7 is Figure 1 is the top view of the F rail length adjustment section; Figure 8 is Figure 7 is the sectional view at C-C; 1, beam body one, 2, beam body two, 3, beam joint, 4, fixed F rail section one, 5, fixed steel sleeper, 5.1, type I steel sleeper, 6, F rail length adjustment section, 6.1, movable F rail, 7, slide rail base, 8, sliding support, 9, sliding steel sleeper, 10, scissor link, 11, longitudinal beam, 12, slide rail one, 13, fixed support, 14, connecting piece, 15, slide rail two, 16, slide groove base two, 17, slide groove base one, 18, mounting position one, 19, mounting position two, 20, fixed F rail section two. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the present application, the present application will be described more fully below, and the preferred embodiments of the present application will be given. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application can be more thoroughly and completely understood.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application.

[0021] Embodiment: Referring to Figures 1-8 The present embodiment provides a magnetic levitation traffic bridge beam end large displacement expansion and track temperature adjustment integrated device, which comprises a fixed F rail section one 4, a fixed F rail section two 20, an F rail length adjustment section 6 and a steel sleeper spacing adjustment device. The fixed F rail section two 20 and the F rail length adjustment section 6 are sequentially connected and arranged on the beam body two 2, the fixed F rail section one 4 is arranged on the beam body one 1 and extends to the beam body two 2 across the beam joint 3 to be connected with the F rail length adjustment section 6, and the F rail length adjustment section 6 can be length-adjusted; that is, one side of the F rail length adjustment section 6 is connected with the fixed F rail section one 4, and the other side of the F rail length adjustment section 6 is connected with the fixed F rail section two 20, and the length adjustment of the F rail length adjustment section 6 realizes the length change of the whole maglev track.

[0022] The steel sleeper spacing adjustment device is arranged at the beam joint 3 between the beam body one 1 and the beam body two 2 and below the fixed F rail section one 4, the steel sleeper spacing adjustment device comprises a plurality of sliding steel sleepers 9 arranged at intervals in the longitudinal bridge direction, the end sliding steel sleeper 9 close to the beam body one 1 is in a relatively fixed state with the beam body one 1, and the end sliding steel sleeper 9 close to the beam body two 2 is in a relatively fixed state with the beam body two 2; the sliding steel sleeper 9 is slidingly connected with the fixed F rail section one 4 above the sliding steel sleeper 9, and the spacing between adjacent sliding steel sleepers 9 can be adjusted with the change of the beam joint 3.

[0023] Specifically, a plurality of fixed steel sleepers 5 are arranged at intervals in the longitudinal bridge direction on the beam body one 1 and the beam body two 2, the fixed F rail section one 4 is supported by the fixed steel sleepers 5 on the beam body one 1, and meanwhile, the part of the fixed F rail section one 4 on the beam body two is also supported by the fixed steel sleepers 5. Similarly, the fixed F rail section two 20 is also supported by the fixed steel sleepers 5 on the beam body two. The fixed F rail section one 4 and the fixed F rail section two 20 are both conventional maglev track arrangement modes in the prior art, so the fixed F rail section one 4 and the fixed F rail section two 20 are not further described in this embodiment.

[0024] As shown in Figure 1 , Figure 2 , Figure 7 and Figure 8 , the F rail length adjustment section 6 comprises a plurality of movable F rails 6.1 arranged at intervals in the longitudinal bridge direction, a plurality of fixed steel sleepers 5 are arranged at intervals in the longitudinal bridge direction below the F rail length adjustment section 6, the movable F rail 6.1 is slidingly connected with the fixed steel sleeper 5 below the movable F rail 6.1, the adjacent movable F rails 6.1, the end movable F rail 6.1 close to the beam joint 3 and the fixed F rail section one 4, and the end movable F rail 6.1 away from the beam joint 3 and the fixed F rail section two 20 are all connected in a mortise and tenon structure, and the mortise and tenon structure leaves an activity gap in the longitudinal bridge direction, so that the F rail length adjustment section 6 can be stretched and contracted in the longitudinal bridge direction.

[0025] It should be noted that in some embodiments, the tenon-and-mortise structure can only be used between adjacent movable F tracks 6.1, and the movable F tracks 6.1 at both ends are fixedly connected with the fixed F track segment one 4 and the fixed F track segment two 20. This connection mode can also achieve the length adjustment of the F track length adjustment segment 6. Further, the number of the movable F tracks 6.1 should be determined according to the variation range of the beam gap.

[0026] Specifically, the fixed sleeper 5 below the F track length adjustment segment 6 is provided with a sliding groove seat two 16, and the bottom surface of each movable F track 6.1 is provided with a sliding rail two 15 with the same length as the movable F track 6.1. The sliding rail two 15 is slidingly arranged in the sliding groove seat two 16, so that the movable F track 6.1 and the fixed sleeper 5 below it can move relative to each other in the longitudinal bridge direction.

[0027] Further, the sliding groove seat two 16 on each fixed sleeper 5 below the F track length adjustment segment 6 in this embodiment is an integral structure, that is, a sliding groove seat two 16 with the same length as the maximum length of the F track length adjustment segment 6 is arranged, and the sliding groove seat two 16 is installed on each fixed sleeper 5 below the F track length adjustment segment 6. In this way, the condition of derailment between the movable F track 6.1 and the sliding groove seat two 16 can be prevented.

[0028] Specifically, the tenon-and-mortise structure includes a connecting male head and a connecting female head. The connecting male head is divided into a clamping portion and a connecting portion and the two are connected together. The width dimension of the clamping portion is greater than that of the connecting portion. Correspondingly, the connecting female head includes a clamping groove and a connecting groove. The width dimension of the clamping groove is the same as that of the clamping portion, and the length dimension of the clamping groove is greater than that of the clamping portion. The width dimension of the connecting groove is the same as that of the connecting portion, and the length dimension of the connecting groove is less than that of the connecting portion, so as to leave a movable gap in the longitudinal bridge direction while limiting the movement in the transverse bridge direction. The width dimension refers to the dimension in the transverse bridge direction, and the length dimension refers to the dimension in the longitudinal bridge direction. After the connecting male head is clamped into the connecting female head, the two are connected together, and a movable gap of 0-20mm is left in the longitudinal bridge direction, so that the F track length adjustment segment 6 can be length-adjusted in the longitudinal bridge direction.

[0029] In this embodiment, since the F track length adjustment segment 6 can be length-adjusted, the track changes caused by large displacement of the beam end and track temperature can be ensured by the length adjustment of the F track length adjustment segment 6 to ensure the normal operation of the maglev track. At the same time, in this embodiment, the F track length adjustment segment 6 is arranged on the beam body two 2 instead of being arranged above the beam gap, so that the structure in this embodiment is simpler, and the arrangement number of the sliding sleepers 9 is no longer restricted by the F track length adjustment segment 6, which can greatly reduce the arrangement number of the sliding sleepers 9 at the beam gap.

[0030] Referring to Figures 3-6The steel sleeper spacing adjusting device further comprises a longitudinal beam 11 and a scissor link 10, two ends of the longitudinal beam 11 are respectively arranged on the beam body one 1 and the beam body two 2, one end is fixedly arranged, and the other end is slidably arranged; a plurality of sliding steel sleepers 9 are slidably arranged on the longitudinal beam 11 and are connected through the scissor link 10 between adjacent sliding steel sleepers 9. The longitudinal beam 11 is a support structure of all the sliding steel sleepers 9, and the force borne by the sliding steel sleepers 9 is transmitted to the beam body one and the beam body two respectively. Meanwhile, one end of the longitudinal beam 11 is slidably arranged, and the other end is fixedly arranged, which can not only ensure that the longitudinal beam can move with the change of the beam gap, but also ensure that the fixed end of the longitudinal beam and the end sliding steel sleeper 9 close to the fixed end of the longitudinal beam remain in a relatively fixed state, effectively preventing the derailment between the sliding steel sleeper 9 and the longitudinal beam 11. Further, the length of the longitudinal beam needs to be greater than the overall length of the maximum spacing between the sliding steel sleepers, so as to ensure that the sliding steel sleepers will not derail in the limit state. Further, the scissor link 10 connects two adjacent sliding steel sleepers 9, so that the spacing between the sliding steel sleepers 9 can be adjusted synchronously, ensuring that the sliding steel sleepers 9 are always evenly distributed below the fixed F rail section one 4 during the adjustment process, and ensuring that the fixed F rail section one 4 is evenly stressed at the beam gap.

[0031] As shown in Figure 5 , the fixed steel sleeper 5 for supporting the fixed F rail section one 4 on the beam body two 2 and the sliding steel sleeper 9 are both provided with a sliding groove seat one 17, and the part of the fixed F rail section one 4 located below the beam gap 3 and the beam body two 2 is provided with a sliding rail one 12 on the bottom surface, the sliding rail one 12 is slidably arranged in the sliding groove seat one 17, so that the fixed F rail section one 4 can move relatively in the longitudinal bridge direction with respect to the sliding steel sleeper 9 and the fixed steel sleeper 5 below the fixed F rail section one 4 on the beam body two, which not only meets the requirements of large displacement of beam end and track temperature caused track change, but also meets the requirements that each sliding steel sleeper 9 can uniformly support the fixed F rail section one 4 when the beam gap changes. Further, the sliding groove seat one 17 and the sliding groove seat two 16 need to be coaxially arranged.

[0032] Further, as shown in Figure 1 and Figure 3 , the beam body one 1 is provided with a mounting position one 18, and the beam body two 2 is provided with a mounting position two 19, the mounting position one 18 is provided with a fixed support 13, the mounting position two 19 is provided with a sliding rail base 7 and a sliding support 8 which can slide in the sliding rail base 7, one end of the longitudinal beam 11 is connected with the fixed support 13, and the other end is connected with the sliding support 8.

[0033] Preferably, the sliding support 8 and the fixed support 13 are both spherical hinge supports, which can not only be displaced and expanded in the longitudinal bridge direction, but also can be adaptively adjusted in the transverse and vertical directions, improving the stress condition of the system and further improving the stability and reliability of the whole system.

[0034] Specifically, the installation site one 18 is arranged on the upper side of the beam body one 1 near the one end of the beam gap, the installation site two 19 is arranged on the upper side of the beam body two 2 near the one end of the beam gap, and the installation site one and the installation site two are both sunken platforms, which provide installation space for the steel sleeper spacing adjustment device and ensure that the entire maglev track is in a flat state after the steel sleeper spacing adjustment device is installed. Further, as shown in Figure 3 , the end part of the sliding steel sleeper 9 near the fixed support 13 is fixedly arranged on the longitudinal beam 11 to ensure that the sliding steel sleeper 9 and the longitudinal beam 11 will not derail during the change of the beam gap width.

[0035] Referring to Figure 3 , the end part of the sliding steel sleeper 9 near the beam body one 1 is connected to the fixed steel sleeper 5 on the beam body one 1 closest to the beam gap 3 through the connecting piece 14 to ensure that the sliding steel sleeper and the beam body one 1 are in a relatively fixed state; the end part of the sliding steel sleeper 9 near the beam body two 2 is connected to the fixed steel sleeper 5 on the beam body two 2 through the connecting piece 14 to ensure that the sliding steel sleeper and the beam body two 2 are in a relatively fixed state.

[0036] Further, since a sliding rail base 7 with a certain length needs to be arranged in the installation site two 19, at least one fixed steel sleeper 5 is arranged in the installation site two 19 in the longitudinal bridge direction to support the F rail segment one 4 to prevent the maglev track from being insufficient in rigidity and deformed at the installation site two, and the fixed steel sleeper 5 in the installation site two 19 is a type I steel sleeper 5.1. As shown in Figure 4 and Figure 6 , two sliding rail bases 7 are arranged in parallel, and the base of the type I steel sleeper 5.1 is arranged on the beam body two 2 and located between the two sliding rail bases 7.

[0037] Further, in order to ensure that the end part of the sliding steel sleeper 9 near the beam body two 2 and the beam body two 2 will not relatively displace during the change of the beam gap, the fixed steel sleeper 5 on the beam body two 2 closest to the installation site two 19, the type I steel sleeper 5.1 in the installation site two 19, and the end part of the sliding steel sleeper 9 near the beam body two 2 are sequentially connected through the connecting piece 14 in the longitudinal bridge direction in the embodiment. Under this structure, the stress condition of the type I steel sleeper 5.1 can be significantly reduced to ensure that the type I steel sleeper 5.1 will not be deformed or damaged during the change of the beam gap. Of course, the fixed steel sleeper 5 in the installation site two in some embodiments can adopt other structural forms, so that only the fixed steel sleeper closest to the beam gap in the installation site two and the end part of the sliding steel sleeper 9 near the beam body two 2 can be connected through the connecting piece 14. Further, the connecting piece 14 can be a channel steel or a square steel pipe, etc. The type of the fixed steel sleeper outside the installation site two in the embodiment can be selected according to relevant specifications by those skilled in the art.

[0038] AsFigure 6 As shown, the scissors linkage 10 includes a plurality of linkages, two linkages are hinged with the pin shaft on one sliding sleeper 9 to form a cross structure, and the two linkage ends on the same side of one sliding sleeper 9 are hinged with the two linkage ends on the same side of the adjacent sliding sleeper. The synchronous movement of each sliding sleeper 9 can be realized through the scissors linkage 10, and the uniform distribution of each sliding sleeper 9 on the girder is ensured to support the fixed F rail section one 4 above the beam gap.

[0039] When the beam gap changes due to temperature change or other reasons, the fixed sleeper 5 acts on the sliding sleeper 9 through the connecting piece 14, so that the interval of the adjacent sliding sleeper 9 follows the change of the beam gap; and the fixed F rail section one 4 and the fixed F rail section two 20 respectively follow the relative movement of the beam body one and the beam body two, and the length adjustment of the F rail length adjustment section 6 is performed to compensate for the change of the maglev track caused by the change of the beam gap.

[0040] The technical scheme of the embodiment has the following effects: In the embodiment, the expansion adjustment of the F rail (i.e. the maglev track) and the adjustment of the interval of the sliding sleepers at the beam gap are solved in different sections, and the two adjustment modes do not interfere with each other, so that the interval adjustment of the sliding sleepers is not constrained by the small deformation gap of the F rail and becomes simple and stable, and the adjustment of the large number of F rail deformation gaps is not constrained by the sliding sleepers and can be realized by a simple structure.

[0041] In the embodiment, the sleeper interval adjustment device includes a longitudinal beam, sliding sleepers and scissors linkages, and the large displacement of the sliding sleepers is realized by the series connection of the few sliding sleepers through the scissors linkages, and the distance between the sliding sleepers is equal during the sliding process, and the system tends to be stable.

[0042] In the embodiment, the fixed support and the sliding support are both ball hinge type supports, which have good self-adaptability, can avoid stress concentration, and ensure the stability of the system.

[0043] In the embodiment, the F rail length adjustment section realizes the connection between the adjacent movable F rails through the mortise and tenon structure, so that the F rail length adjustment section becomes simple and efficient while ensuring the function. The F rail length adjustment section and the fixed F rail section one are respectively provided with a sliding connection structure, so that the interval adjustment of the sliding sleepers and the length adjustment of the F rail do not affect each other, and the stable operation of the system is ensured.

[0044] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An integrated device for large displacement expansion and contraction at the beam end and track temperature regulation of a maglev bridge, characterized in that, It includes fixed F-rail section one (4), fixed F-rail section two (20), F-rail length adjustment section (6) and steel sleeper spacing adjustment device; The fixed F-rail section two (20) and the F-rail length adjustment section (6) are sequentially connected and set on the beam body two (2). The fixed F-rail section one (4) is set on the beam body one (1) and extends across the beam joint (3) to the beam body two (2) and connects with the F-rail length adjustment section (6). The F-rail length adjustment section (6) can be adjusted in length. The steel sleeper spacing adjustment device is located at the beam joint (3) between beam one (1) and beam two (2) and below the fixed F rail section one (4). The steel sleeper spacing adjustment device includes multiple sliding steel sleepers (9) spaced apart along the longitudinal direction of the bridge. The end sliding steel sleeper (9) near beam one (1) is relatively fixed to beam one (1), and the end sliding steel sleeper (9) near beam two (2) is relatively fixed to beam two (2). The sliding steel sleeper (9) is slidably connected to the fixed F rail section one (4) above it, and the spacing between adjacent sliding steel sleepers (9) can be adjusted as the beam joint (3) changes.

2. The integrated device for large displacement expansion and contraction at the beam end and track temperature regulation of a maglev transportation bridge according to claim 1, characterized in that, The steel sleeper spacing adjustment device also includes a longitudinal beam (11) and a scissor link (10). The two ends of the longitudinal beam (11) are respectively set on beam body one (1) and beam body two (2), one end of which is fixed and the other end is slidable. Multiple sliding steel sleepers (9) are slidably set on the longitudinal beam (11) and adjacent sliding steel sleepers (9) are connected by the scissor link (10).

3. The integrated device for large displacement expansion and contraction at the beam end and track temperature regulation of a maglev transportation bridge according to claim 2, characterized in that, The fixed steel sleeper (5) on the second beam (2) for supporting the fixed F rail section (4) and the sliding steel sleeper (9) are both provided with a sliding groove seat (17). The part of the fixed F rail section (4) located on the beam joint (3) and the second beam (2) is provided with a sliding rail (12) on the bottom surface. The sliding rail (12) is slidably set in the sliding groove seat (17).

4. The integrated device for large displacement expansion and contraction at the beam end and track temperature regulation of a maglev transportation bridge according to claim 2, characterized in that, The beam body one (1) is provided with an installation position one (18), the beam body two (2) is provided with an installation position two (19), the installation position one (18) is provided with a fixed support (13), the installation position two (19) is provided with a slide rail base (7) and a sliding support (8) that can slide in the slide rail base (7), one end of the longitudinal beam (11) is connected to the fixed support (13), and the other end is connected to the sliding support (8).

5. The integrated device for large displacement expansion and contraction at the beam end and track temperature regulation of a maglev transportation bridge according to claim 4, characterized in that, The end sliding steel sleeper (9) near beam one (1) is connected to the fixed steel sleeper (5) on beam one (1) by a connector (14), and the end sliding steel sleeper (9) near beam two (2) is connected to the fixed steel sleeper (5) on beam two (2) by a connector (14).

6. The integrated device for large displacement expansion and contraction at the beam end and track temperature regulation of a maglev transportation bridge according to claim 5, characterized in that, In the second installation position (19), at least one fixed steel sleeper (5) is provided in the longitudinal direction of the bridge to support the fixed F rail section (4). The fixed steel sleeper (5) in the second installation position (19) is a type I steel sleeper (5.1).

7. The integrated device for large displacement expansion and contraction at the beam end and track temperature regulation of a maglev transportation bridge according to claim 6, characterized in that, The fixed steel sleeper (5) closest to the installation position two (19) on the beam body two (2), each type I steel sleeper (5.1) in the installation position two (19) and the end sliding steel sleeper (9) close to the beam body two (2) are connected in sequence in the longitudinal direction of the bridge by the connector (14).

8. The integrated device for large displacement expansion and contraction at the beam end and track temperature regulation of a maglev transportation bridge according to claim 2, characterized in that, The scissor link (10) includes multiple links. Two links are simultaneously hinged to a pin on a sliding steel sleeper (9) to form a cross structure. The ends of two links on the same side of a sliding steel sleeper (9) are respectively hinged to the ends of two links on the same side of the adjacent sliding steel sleeper (9).

9. The integrated device for large displacement expansion and contraction at the beam end and track temperature regulation of a maglev transportation bridge according to any one of claims 1-8, characterized in that, The F-rail length adjustment section (6) includes multiple movable F-rails (6.1) arranged sequentially along the longitudinal direction of the bridge. Multiple fixed steel sleepers (5) are spaced apart below the F-rail length adjustment section (6) along the longitudinal direction of the bridge. The movable F-rails (6.1) are slidably connected to the fixed steel sleepers (5) below them. Adjacent movable F-rails (6.1) are connected by a mortise and tenon structure. The mortise and tenon structure leaves an movable gap in the longitudinal direction of the bridge.

10. The integrated device for large displacement expansion and contraction at the beam end and track temperature regulation of a maglev transportation bridge according to claim 9, characterized in that, The fixed steel sleeper (5) below the F-rail length adjustment section (6) is provided with a slide rail seat (16). The bottom surface of each movable F-rail (6.1) is provided with a slide rail (15) of the same length as the movable F-rail (6.1). The slide rail (15) is slidably disposed in the slide rail seat (16).

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