Railway bridge transverse moving beam replacement device and method

Abstract

The application discloses a railway bridge transverse moving beam replacement device and method and belongs to the technical field of railway beam replacement. The front and rear ends of the main body part are provided with clamping parts, the two sides of the clamping part are provided with clamping blocks matched with the clamping grooves in a telescopic mode, the width of the clamping block is smaller than that of the clamping groove, the thick steel plate part away from the main oil cylinder on one side of the clamping groove is a reverse stress area, the clamping part is further provided with inner and outer pressure blocks matched with the clamping blocks in approaching or moving away from the clamping groove, the thick steel plate part is located between the inner and outer pressure blocks, and the inner and outer pressure blocks are located in the reverse stress area to extrude the inner and outer sides of the thick steel plate part. The application avoids the situation that the clamping block is difficult to be smoothly inserted into the clamping groove, the profile steel at the clamping groove is prone to plastic deformation, local buckling and even cracking under repeated load action, the geometric size of the clamping groove is changed, the matching gap is increased, the normal clamping of the subsequent clamping block and the effective transmission of force are affected, and the safety hidden danger of the beam replacement operation is caused.

Description

Technical Field

[0001] This invention relates to the field of railway bridge beam replacement technology, specifically to a railway bridge transverse beam replacement device and method. Background Technology

[0002] As a crucial component of railway transportation infrastructure, railway bridges inevitably suffer structural damage and reduced load-bearing capacity during long-term operation due to repeated train loads, environmental erosion, and material aging. When bridge structural defects develop to a certain extent and can no longer meet safe operation requirements, the existing bridge beams must be replaced. Because railway transportation is characterized by high density and high time efficiency, beam replacement work typically needs to be completed within a limited "maintenance window," thus placing extremely high demands on the reliability, efficiency, and ease of operation of the beam replacement equipment.

[0003] Currently, a common construction method in railway bridge beam replacement operations is to use a reaction force clamping device to achieve the horizontal translation of the beam. The basic principle is as follows: a reaction force seat with a slot is set on the existing beam or the beam-moving platform. Hydraulic jacks or other driving equipment push the clamping blocks into the corresponding slots. The mechanical engagement between the clamping blocks and the slots transmits horizontal thrust, thereby translating the beam to be replaced along the transverse direction of the bridge to the predetermined position, completing the removal of the old beam and the placement of the new beam. This method has advantages such as relatively simple structure and clear force transmission path, and has been widely used in railway beam replacement projects.

[0004] During the transverse beam replacement operation, due to factors such as the complex construction site environment, the large weight of the beam, uneven foundation settlement, and synchronization deviations in the hydraulic system, horizontal or vertical positional deviations can easily occur between the locking block and the corresponding slot. When the deviation exceeds the allowable range, the locking block will have difficulty being smoothly inserted into the slot, and may even become stuck or jammed. This not only seriously affects the construction progress but may also cause localized damage to the locking block or slot due to forced insertion, reducing the service life of the device and structural safety.

[0005] In reaction force clamping devices, the slot is typically constructed from welded or assembled steel sections. After the clamping block is inserted into the slot, the horizontal thrust is transmitted to the steel section through the contact surface between the clamping block and the sidewall of the slot. Due to the limited contact area, the steel section at the slot experiences significant localized stress concentration, and existing devices lack dedicated protective structures or reinforcement measures in this stress-bearing area. Under repeated loading, the steel section at the slot is highly susceptible to plastic deformation, localized buckling, and even cracking, leading to changes in the slot's geometry and increased clearance. This, in turn, affects the proper insertion of subsequent clamping blocks and the effective transmission of force, posing safety hazards to beam replacement operations.

[0006] Therefore, it is necessary to provide a railway bridge transverse beam replacement device and method to solve the above problems. Summary of the Invention

[0007] In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a railway bridge transverse beam replacement device and method to solve the problems mentioned in the background art.

[0008] The technical solution adopted by the present invention to solve its technical problem is: a railway bridge transverse beam replacement device and method, comprising a plurality of steel distribution beams for supporting the replacement bridge, which are installed at the bottom of the replacement bridge along the width direction of the replacement bridge; A steel sliding beam is installed along the moving direction of the new bridge and has a support unit at the bottom. Several lifting jacks are installed inside the steel sliding beam. The output end of the lifting jacks abuts against the bottom of the steel distribution beam. The two sides of the steel sliding beam are thick steel plate sections, and several slots are evenly spaced on the thick steel plate sections. The main hydraulic cylinder is installed on the steel slide beam. The output end is connected to a clamping unit, and the fixed end is connected to a pressure block. The upper end of the pressure block contacts the bottom of the steel distribution beam, and the lower end contacts the upper surface of the steel slide beam. The clamping unit has a main body, and both ends of the main body have clamping parts. The two sides of the clamping parts are telescopically connected with clamping blocks aligned with the clamping groove. The width of the clamping blocks is smaller than that of the clamping groove. The thick steel plate part on the side of the clamping groove away from the main cylinder is the reverse force zone. The clamping parts also have inner pressure blocks and outer pressure blocks that move towards or away from the clamping groove synchronously with the clamping blocks. The thick steel plate part is located between the inner pressure blocks and the outer pressure blocks. The inner pressure blocks and the outer pressure blocks are both located in the reverse force zone to squeeze the inner and outer sides of the thick steel plate part at this location.

[0009] Furthermore, auxiliary oil cylinders are symmetrically arranged inside the locking part. The output end of the auxiliary oil cylinder faces the locking groove and is fixedly connected to a connecting block. The surface of the connecting block is fixedly connected to the bottom of the locking block and slidably connected to the bottom of the moving platform. The connecting block drives the locking block and the moving platform to move closer to or away from the thick steel plate part synchronously.

[0010] Furthermore, both sides of the latching part are provided with sliding grooves, and the length of the sliding grooves is greater than the length of the moving platform; The connecting block has a dovetail groove on its surface facing the moving platform, and the bottom of the moving platform has a dovetail protrusion that matches the dovetail groove.

[0011] Furthermore, the movable platform has a sliding cavity with an opening facing the thick steel plate portion, and a plurality of springs are installed inside the sliding cavity, with the inner pressure block slidably connected to the sliding cavity; One end of the spring abuts against the bottom of the sliding cavity, and the other end abuts against the bottom of the inner pressure block.

[0012] Furthermore, the top of the moving platform has an upward protrusion, and the top of the snap-fit ​​part has a downward-opening slide rail. A pressure block is slidably connected in the slide rail, and the pressure block has a downward-extending lower protrusion, which is fixedly connected to the upper protrusion.

[0013] Furthermore, a hydraulic cavity is provided inside the snap-fit ​​part, and the hydraulic cavity is filled with hydraulic medium; One end of the pressure block has a piston head, the outer surface of the piston head has a sealing ring, the outer wall of the sealing ring abuts against the inner wall of the hydraulic chamber, and both the piston head and the sealing ring are located inside the hydraulic chamber; The outer pressure block is located at the other end of the hydraulic chamber, and the outer surface of the outer pressure block has a seal that abuts against the inner wall of the hydraulic chamber.

[0014] Furthermore, a stainless steel plate is installed on the upper surface of the steel slide beam along its length, and the stainless steel plate is located between two thick steel plates. The bottom of the lifting jack has a PTFE plate, the bottom of which is slidably connected to the top surface of a stainless steel plate and located between two thick steel plates.

[0015] Furthermore, the support unit includes several steel pipe support platforms, which are evenly arrayed at the moving position of the bridge. Each steel pipe support platform has two transversely arranged steel spreader beams at its top, and the steel slide beam is located at the top center of the steel spreader beams.

[0016] Furthermore, including the following steps

[0017] Step 1: Complete the construction of the support unit, install the new bridge on the steel sliding beam, and prepare to move it horizontally; Step 2: Insert the card block into the corresponding slot, and simultaneously press the pressure block against the thick steel plate in the reverse force zone; Step 3: Control the extension and retraction of the main hydraulic cylinder to complete the translation of the new bridge. Step 4: After the new bridge is moved into place, it will be installed.

[0018] The beneficial effects of the present invention are as follows: The railway bridge transverse beam replacement device and method provided by the present invention, by setting a block smaller than the width of the slot, allows the block to be smoothly inserted into the slot. At the same time, by setting inner and outer pressure blocks that are synchronously close to or away from the thick steel plate, the thick steel plate in the slot is physically protected when the thick steel plate is under stress. This avoids the block being difficult to insert smoothly into the slot, and prevents the steel at the slot from easily undergoing plastic deformation, local buckling or even cracking under repeated loads. This leads to changes in the geometric dimensions of the slot and an increase in the fit clearance, which in turn affects the normal insertion of the subsequent block and the effective transmission of force, thus creating safety hazards for the beam replacement operation. By incorporating an upper protrusion, a lower protrusion, and a hydraulic chamber, the inner and outer pressure blocks can move synchronously, saving installation space and improving the accuracy of their extension.

[0019] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is a schematic diagram of the steel pipe support platform of the present invention; Figure 3 This is a side view of the steel pipe support platform of the present invention; Figure 4 For the present invention Figure 3 Enlarged diagram of area A in the middle; Figure 5 This is a schematic diagram of the clamping unit of the present invention; Figure 6 This is a bottom view of the clamping unit of the present invention; Figure 7 This is a cross-sectional schematic diagram of the clamping unit of the present invention; Figure 8 This is a schematic diagram of the pressing block pressing the thick steel plate part of the present invention; The following are the labeling elements in the figure: 1. Base bridge; 2. Replacement bridge; 3. Steel pipe support platform; 31. Steel spreader beam; 4. Steel slide beam; 41. Thick steel plate section; 42. Slot; 43. Stainless steel plate; 5. Lifting jack; 51. PTFE plate; 6. Steel distribution beam; 7. Main cylinder; 71. Pressure block; 8. Clamping unit; 801. Slide groove; 802. Slide; 803. Hydraulic chamber; 81. Main body; 82. Clamping part; 83. Auxiliary cylinder; 84. Connecting block; 841. Dovetail groove; 85. Moving platform; 851. Dovetail protrusion; 852. Sliding chamber; 853. Upper protrusion; 86. Spring; 87. Inner pressure block; 88. Pressurizing block; 881. Piston head; 882. Sealing ring; 883. Lower protrusion; 89. Outer pressure block; 891. Seal; 9. Clamping block. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0023] like Figure 1-8 As shown, the present invention provides a technical solution: a railway bridge transverse beam replacement device and method, comprising a plurality of steel distribution beams 6 for supporting the replacement bridge 2, which are installed at the bottom of the replacement bridge 2 along the width direction of the replacement bridge 2. The steel slide beam 4 is set along the moving direction of the new bridge 2 and has a support unit at the bottom. Several lifting jacks 5 are installed inside the steel slide beam 4. The output end of the lifting jacks 5 abuts against the bottom of the steel distribution beam 6. The two sides of the steel slide beam 4 are thick steel plate parts 41. Several slots 42 are evenly spaced on the thick steel plate parts 41. The main oil cylinder 7 is installed on the steel slide beam 4. The output end is connected to the clamping unit 8, and the fixed end is connected to the pressure block 71. The upper end of the pressure block 71 contacts the bottom of the steel distribution beam 6, and the lower end contacts the upper surface of the steel slide beam 4. The clamping unit 8 has a main body 81, and both ends of the main body 81 have clamping parts 82. The clamping parts 82 are telescopically connected to the sides of the clamping parts 82, and the clamping blocks 9 are aligned with the clamping groove 42. The width of the clamping blocks 9 is smaller than that of the clamping groove 42. The thick steel plate part 41 on the side of the clamping groove 42 away from the main cylinder 7 is the reverse force zone. The clamping parts 82 also have an inner pressure block 87 and an outer pressure block 89 that move closer to or away from the clamping groove 42 synchronously with the clamping blocks 9. The thick steel plate part 41 is located between the inner pressure block 87 and the outer pressure block 89. The inner pressure block 87 and the outer pressure block 89 are both located in the reverse force zone to squeeze the inner and outer sides of the thick steel plate part 41 at this location.

[0024] A secondary hydraulic cylinder 83 is symmetrically arranged inside the locking part 82. The output end of the secondary hydraulic cylinder 83 faces the locking groove 42 and is fixedly connected to the connecting block 84. The surface of the connecting block 84 is fixedly connected to the bottom of the locking block 9 and slidably connected to the bottom of the moving table 85. The connecting block 84 drives the locking block 9 and the moving table 85 to move closer to or away from the thick steel plate part 41 synchronously.

[0025] Both sides of the latching part 82 are provided with sliding grooves 801, and the length of the sliding grooves 801 is greater than the length of the moving table 85. The connecting block 84 has a dovetail groove 841 on its surface facing the moving stage 85, and the bottom of the moving stage 85 has a dovetail protrusion 851 that matches the dovetail groove 841.

[0026] The movable stage 85 has a sliding cavity 852 with an opening facing the thick steel plate part 41. Several springs 86 are installed in the sliding cavity 852, and the inner pressure block 87 is slidably connected to the sliding cavity 852. One end of the spring 86 abuts against the bottom of the sliding cavity 852, and the other end abuts against the bottom of the inner pressure block 87.

[0027] The top of the moving platform 85 has an upward protrusion 853, and the top of the locking part 82 has a downward-opening slide 802. A pressure block 88 is slidably connected in the slide 802. The pressure block 88 has a downward-extending lower protrusion 883, and the lower protrusion 883 is fixedly connected to the upper protrusion 853.

[0028] A hydraulic chamber 803 is provided inside the snap-fit ​​part 82, and the hydraulic chamber 803 is filled with hydraulic medium. One end of the pressure block 88 has a piston head 881, and the outer surface of the piston head 881 has a sealing ring 882. The outer wall of the sealing ring 882 abuts against the inner wall of the hydraulic chamber 803. Both the piston head 881 and the sealing ring 882 are located inside the hydraulic chamber 803. The outer pressure block 89 is located at the other end of the hydraulic chamber 803, and the outer surface of the outer pressure block 89 has a sealing element 891 that abuts against the inner wall of the hydraulic chamber 803.

[0029] A stainless steel plate 43 is installed on the upper surface of the steel slide beam 4 along the length direction, and the stainless steel plate 43 is located between two thick steel plate parts 41. The bottom of the lifting jack 5 has a PTFE plate 51, the bottom of which is slidably connected to the top surface of the stainless steel plate 43 and located between two thick steel plate sections 41.

[0030] The support unit includes several steel pipe support platforms 3, which are evenly arrayed at the moving position of the new bridge 2. Each steel pipe support platform 3 has two horizontally arranged steel spreader beams 31 on its top, and the steel slide beam 4 is located at the top center of the steel spreader beams 31.

[0031] Specifically, the working method of this transverse beam-changing device is as follows: Step 1: Complete the construction of the support unit, install the new bridge on the steel sliding beam, and prepare for its translation. The old bridge that needs to be replaced is removed from the whole bridge, so that a gap is exposed in the middle of the completed railway. The bridges on both sides of the gap are the reference bridge 1. Several steel pipe support platforms 3 are erected at the gap. The steel spreader beam 31 is installed on the top of the steel pipe support platform 3 along the length of the reference bridge 1. Then, the steel slide beam 4 is placed transversely in the middle of the steel spreader beam 31. The lifting jack 5 is placed on the top of the stainless steel plate 43. The steel distribution beam 6 is placed on the top of the lifting jack 5. Then, the new bridge 2 is moved to each steel distribution beam 6 so that the new bridge 2 is supported by the steel distribution beam 6. Adjust the positions of both ends of the new bridge 2 and the reference bridges 1 on both sides so that the two ends of the new bridge 2 are level with the positions of the reference bridges 1. Start the lifting jack 5 to raise the new bridge 2 to a height higher than the reference bridge 1. Then place the pressure block 71 at the bottom of the end opposite to the direction of travel of the steel distribution beam 6. Lower the lifting jack 5 so that the top of the pressure block 71 contacts the steel distribution beam 6. The surface of the pressure block 71 bears part of the force of the steel distribution beam 6. Then install the main hydraulic cylinder 7 on the pressure block 71 and the clamping unit 8 on the piston rod of the main hydraulic cylinder 7 so that the clamping unit 8 is located on the stainless steel plate 43. Install the main hydraulic cylinder 7 and the clamping unit 8 on each steel slide beam 4 in the same way as above.

[0032] Step 2: Insert the clamping block into the corresponding slot, simultaneously pressing the pressure block against the thick steel plate in the reverse force zone: By controlling the extension and retraction end of the main hydraulic cylinder 7, the clamping unit 8 is driven to slide on the stainless steel plate 43 until the clamping block 9 is aligned with the groove 42. Then, the main hydraulic cylinder 7 stops working and the two auxiliary hydraulic cylinders 83 are simultaneously started to extend. The piston rod of the auxiliary hydraulic cylinder 83 drives the connecting block 84 to move closer to the inside of the thick steel plate part 41, so that the clamping block 9 is located in the groove 42. The inner pressure block 87 abuts against the inner wall surface of the thick steel plate part 41. At this time, the inner pressure block 87 moves closer to the bottom of the sliding cavity 852, and the spring 86 is compressed to generate elastic force. Since the upper protrusion 853 and the lower protrusion 883 are fixedly connected, when the moving platform 85 approaches the thick steel plate portion 41, the upper protrusion 853 drives the lower protrusion 883 to move in the same direction. At this time, the piston head 881 pushes the hydraulic medium in the hydraulic chamber 803 to compress, so that the outer pressure block 89 moves outward, and the outer pressure block 89 approaches the outer surface of the thick steel plate portion 41. When the clamping block 9 is located in the clamping groove 42, the outer pressure block 89 also abuts against the outer surface of the thick steel plate portion 41. At this time, the inner pressure block 87 and the outer pressure block 89 squeeze and clamp the thick steel plate portion 41, which is in the reverse force zone.

[0033] Step 3: Control the extension and retraction of the main hydraulic cylinder to complete the translation of the new bridge: When the main cylinder 7 is extended, the locking block 9 moves closer to the reverse force area. The inner pressure block 87 and the outer pressure block 89 move synchronously. The inner pressure block 87 moves via the moving table 85, and the outer pressure block 89 slides through its surface in contact with the thick steel plate part 41 until the gap between the locking groove 42 and the thick steel plate part 41 is filled. Then the moving positions of the inner pressure block 87 and the outer pressure block 89 are fixed, and the locking groove 42 at the notch of the reverse force area of ​​the locking block 9 abuts against it. At this time, the main hydraulic cylinder 7 continues to extend, and the locking blocks 9 on both sides of the two locking parts 82 are held by the notches of the locking grooves 42. Under the synchronous action of multiple main hydraulic cylinders 7, the thrust of the main hydraulic cylinder 7 overcomes the gravity of the replacement bridge 2 and pushes the replacement bridge 2 closer to the reference bridge 1. When the distance extended by the main hydraulic cylinder 7 is the same as the distance between the centers of the two locking grooves 42, the main hydraulic cylinder 7 stops working. During the extension of the piston rod of the main cylinder 7, the reverse force area continuously bears the gravity dispersed by the replaced bridge 2. Under the squeezing of the inner pressure block 87 and the outer pressure block 89, the force of the reverse force area of ​​the force groove 42 is dispersed, and at the same time, physical contact is provided to the right angle at the notch of the groove 42 to prevent the right angle side at that point from being subjected to too much pressure and thus deformed. When the auxiliary hydraulic cylinder 83 retracts, the connecting block 84 retracts, and the locking block 9 and the inner pressure block 87 move away from the slot 42 and the thick steel plate part 41, respectively. At the same time, the lower protrusion 883 also retracts synchronously, causing the outer pressure block 89 to retract away from the outer surface of the thick steel plate part 41. When the main hydraulic cylinder 7 retracts to the above-mentioned extended length, the first two locking blocks 9 are aligned with the slot 42 in the direction of travel of the new bridge 2, and the last two locking blocks 9 are aligned with the slot 42 where the first two locking blocks 9 were aligned last time.

[0034] Step 4: After the new bridge is moved into place, install it: Following the steps described above, the replacement bridge 2 is moved horizontally until it reaches the designated position between the two reference bridges 1. Then, the lifting jack 5 is activated to lift it, removing the pressure block 71, main hydraulic cylinder 7, and clamping unit 8 from the steel slide beam 4. The lifting jack 5 is then lowered to align the replacement bridge 2 with the reference bridge 1. The replacement bridge 2 is then fixed to the ground and the reference bridge 1. Finally, the lifting jack 5 is lowered again, and the remaining components are removed, thus completing the railway bridge lateral movement and replacement operation.

[0035] In summary, this device, by setting a locking block 9 that is smaller than the width of the slot 42, allows the locking block 9 to be smoothly inserted into the slot 42. At the same time, by setting inner and outer pressure blocks 89 that move synchronously closer to or further away from the thick steel plate part 41, the thick steel plate part 41, which is in the reverse force zone when the thick steel plate part 41 is under force, is physically protected. This avoids the situation where the locking block 9 will have difficulty being smoothly inserted into the slot 42, and where the steel section at the slot 42 is prone to plastic deformation, local buckling, or even cracking under repeated loading, which would lead to changes in the geometric dimensions of the slot 42 and an increase in the fitting clearance, thereby affecting the normal locking of the locking block 9 and the effective transmission of force, and creating safety hazards for beam replacement operations. By providing an upper protrusion 853, a lower protrusion 883, and a hydraulic chamber 803, the inner pressure block 87 and the outer pressure block 89 can move synchronously, which not only saves installation space but also improves the accuracy of the extension of the inner pressure block 87 and the outer pressure block 89.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A railway bridge transverse beam replacement device, characterized in that: Includes several steel distribution beams (6) for supporting the replacement bridge (2), which are installed at the bottom of the replacement bridge (2) along the width direction of the replacement bridge (2); A steel sliding beam (4) is set along the moving direction of the new bridge (2) and a support unit is set at the bottom. Several lifting jacks (5) are installed inside the steel sliding beam (4). The output end of the lifting jacks (5) abuts against the bottom of the steel distribution beam (6). The two sides of the steel sliding beam (4) are thick steel plate parts (41). Several slots (42) are equally spaced on the thick steel plate parts (41). The main oil cylinder (7) is installed on the steel slide beam (4), with a clamping unit (8) connected to the output end and a pressure block (71) connected to the fixed end. The upper end of the pressure block (71) contacts the bottom of the steel distribution beam (6), and the lower end contacts the upper surface of the steel slide beam (4). The clamping unit (8) has a main body (81), and both ends of the main body (81) have clamping parts (82). The clamping parts (82) are telescopically connected to the sides of the clamping parts (82) and are aligned with the clamping groove (42). The width of the clamping block (9) is smaller than that of the clamping groove (42). The thick steel plate part (41) on the side of the clamping groove (42) away from the main cylinder (7) is the reverse force zone. The clamping part (82) also has an inner pressure block (87) and an outer pressure block (89) that move closer to or away from the clamping groove (42) synchronously with the clamping block (9). The thick steel plate part (41) is located between the inner pressure block (87) and the outer pressure block (89). The inner pressure block (87) and the outer pressure block (89) are both located in the reverse force zone to squeeze the inner and outer sides of the thick steel plate part (41) at this location.

2. The railway bridge transverse beam replacement device according to claim 1, characterized in that: A secondary hydraulic cylinder (83) is symmetrically arranged inside the locking part (82). The output end of the secondary hydraulic cylinder (83) faces the slot (42) and is fixedly connected to a connecting block (84). The surface of the connecting block (84) is fixedly connected to the bottom of the locking block (9) and slidably connected to the bottom of the moving platform (85). The connecting block (84) drives the locking block (9) and the moving platform (85) to move closer to or away from the thick steel plate part (41) synchronously.

3. A railway bridge transverse beam replacement device according to claim 2, characterized in that: The two sides of the latching part (82) are provided with sliding grooves (801), and the length of the sliding grooves (801) is greater than the length of the moving platform (85). The connecting block (84) has a dovetail groove (841) on its surface facing the moving platform (85), and the bottom of the moving platform (85) has a dovetail protrusion (851) that matches the dovetail groove (841).

4. A railway bridge transverse beam replacement device according to claim 2, characterized in that: The movable stage (85) has a sliding cavity (852) with an opening facing the thick steel plate part (41), and a plurality of springs (86) are installed in the sliding cavity (852). The inner pressure block (87) is slidably connected to the sliding cavity (852). One end of the spring (86) abuts against the bottom of the sliding cavity (852), and the other end abuts against the bottom of the inner pressure block (87).

5. A railway bridge transverse beam replacement device according to claim 2, characterized in that: The top of the moving platform (85) has an upward protrusion (853), and the top of the snap-fit ​​part (82) has a downward-opening slide (802). A pressure block (88) is slidably connected in the slide (802). The pressure block (88) has a downward-extending lower protrusion (883), and the lower protrusion (883) is fixedly connected to the upper protrusion (853).

6. A railway bridge transverse beam replacement device according to claim 5, characterized in that: The snap-fit ​​part (82) has a hydraulic cavity (803) inside, and the hydraulic cavity (803) is filled with hydraulic medium; One end of the pressure block (88) has a piston head (881), the outer surface of the piston head (881) has a sealing ring (882), the outer wall of the sealing ring (882) abuts against the inner wall of the hydraulic chamber (803), and the piston head (881) and the sealing ring (882) are both located in the hydraulic chamber (803); The outer pressure block (89) is located at the other end of the hydraulic chamber (803), and the outer surface of the outer pressure block (89) has a seal (891) that abuts against the inner wall of the hydraulic chamber (803).

7. A railway bridge transverse beam replacement device according to claim 1, characterized in that: A stainless steel plate (43) is installed on the upper surface of the steel slide beam (4) along the length direction, and the stainless steel plate (43) is located between two thick steel plate parts (41). The bottom of the lifting jack (5) has a PTFE plate (51), the bottom of which is slidably connected to the top surface of the stainless steel plate (43) and located between two thick steel plate portions (41).

8. A railway bridge transverse beam replacement device according to claim 1, characterized in that: The support unit includes several steel pipe support platforms (3), which are evenly arrayed at the moving position of the new bridge (2). Each steel pipe support platform (3) has two horizontally arranged steel spreader beams (31) on its top, and the steel slide beam (4) is located at the top center of the steel spreader beam (31).

9. A method for a railway bridge transverse beam replacement device, employing the railway bridge transverse beam replacement device as described in any one of claims 1-8, characterized in that: Includes the following steps Step 1: Complete the construction of the support unit, install the new bridge on the steel sliding beam, and prepare to move it horizontally; Step 2: Insert the card block into the corresponding slot, and simultaneously press the pressure block against the thick steel plate in the reverse force zone; Step 3: Control the extension and retraction of the main hydraulic cylinder to complete the translation of the new bridge. Step 4: After the new bridge is moved into place, it will be installed.

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