A rail expansion joint for the ends of the beams of a bridge and a method of expansion

Abstract

The application relates to a beam end rail expansion device and expansion method for a movable bridge, which can rotate the bridge deck by 90 degrees to be parallel to a river, and the ship can smoothly pass through the river, and can realize track communication and meet the driving requirements when the bridge deck is connected, and is composed of a fixed end and an expansion end, the fixed end and the expansion end are respectively arranged on two bridge deck plates of the bridge, a large-span gap is arranged in the middle of the bridge deck plate, the bridge deck plate can be rotated to be opened to meet the navigation demand of the river; the expansion end comprises a rail expander and a mechanical device, when the two bridge deck plates are rotated to the connected state, the basic rail of the rail expander is pulled by the mechanical device, the basic rail is driven to move and expand under the external force, and the basic rail is connected and locked with the track of the fixed end, so that the train passing is ensured.

Description

Technical Field

[0001] The present invention relates to a beam end rail telescopic device and telescopic method for opening a bridge, which can rotate a bridge deck 90 degrees to be parallel to a river so that ships in the river can pass smoothly, and can also connect tracks when the bridge deck is connected to meet driving requirements, and relates to the field of manufacturing telescopic devices specifically for opening bridge decks. Background Art

[0002] CN111236059A, titled "A telescopic track installation structure and adjustment method for beam joints in horizontal and vertical curve overlapped sections," describes an installation structure comprising a beam end telescopic device and a rail telescopic adjuster. The centerline of the beam end telescopic device coincides with the centerline of the beam joint. The base rail and point rail of the rail telescopic adjuster are respectively installed on either side of the beam joint, with the base rail located on the approach bridge side and the point rail located on the main bridge side. The base rail of the rail telescopic adjuster is fixedly connected to at least one steel sleeper on the approach bridge side of the beam end telescopic device. The outer sleeper on the main bridge side of the beam end telescopic device serves as the sleeper connected to the base rail of the rail telescopic adjuster. This invention solves the problem of track installation and adjustment for rail telescopic devices at beam joints during subway construction, effectively addressing the impact of bridge temperature changes on track expansion and contraction. Furthermore, by adjusting the slope, the bridge deck track is smoothed, ensuring safe and stable vehicle passage through the beam joint, meeting the requirements of safe and stable vehicle passage and comfortable riding. Its shortcomings primarily lie in the installation and construction methods of the beam-end telescopic device and rail telescopic adjuster. Furthermore, the beam-end telescopic device and rail telescopic adjuster tracks are always connected, making them unsuitable for the design purpose of this application. When a ship needs to pass through the river, the tracks cannot be disconnected at the beam joint, and the stock rails cannot be retracted as expected under external force, completely disconnecting the tracks at the beam ends and allowing the bridge to open and rotate.

[0003] CN111155425A, titled "A Long-Span Railway Steel Bridge End Telescopic Device," comprises a guide chute, an intermediate transition plate, and side transition plates. The guide chute is mounted on the upper portion of the railway steel bridge track. The intermediate transition plate is fixedly mounted above the guide chute, with side transition plates mounted on opposite sides of the intermediate transition plate in the width direction. Movable steel sleepers, fixed steel sleepers, and concrete switch sleepers are positioned on the upper portion of the track outside the longitudinal ends of the intermediate and side transition plates. The movable, fixed, and concrete switch sleepers are arranged along the width of the intermediate and side transition plates. The longitudinal ends of the movable and fixed sleepers are connected to the side transition plates via a connecting rod telescopic mechanism. The railway steel bridge rails are fixedly mounted above the side transition plates, movable, fixed, and concrete switch sleepers. The present invention has a simple and rational structural design, is easy to install and lay, and facilitates subsequent maintenance, making it suitable for extremely large telescopic displacements. Its shortcomings are: the track of this patent application is always in a connected state. When a ship in the river needs to pass through the river, the track cannot be disconnected at the beam joint position, and the basic rail cannot be retracted as expected under the drive of external force, so that the track at the beam end position is completely disconnected and the bridge can be opened and rotated.

[0004] CN108517761A, entitled "An integral beam end expansion and contraction device suitable for super-long span railway steel bridges", comprises: a basic supporting structure located at the bottom of the beam end expansion and contraction device, consisting of a movable end displacement box, a fixed end displacement box and a supporting beam; wherein the supporting beam is an integral box beam, the two ends of the supporting beam are respectively inserted into the movable end displacement box and the fixed end displacement box, the movable end displacement box is fixedly connected to the embedded steel plate of the approach bridge by bolts, and the fixed end displacement box is fixedly connected to the embedded steel plate of the main bridge by bolts; a plurality of flat The movable steel sleepers and fixed steel sleepers are arranged in a row, and the movable steel sleepers and fixed steel sleepers are arranged perpendicular to the length direction of the railway; the movable steel sleepers are arranged on the top of the supporting beam, and the fixed steel sleepers are arranged on the top of the movable end displacement box and the fixed end displacement box respectively; two steel rails are arranged along the length direction of the railway, located above the movable steel sleepers and the fixed steel sleepers, and connected to the movable steel sleepers and the fixed steel sleepers in sequence through fasteners; a connecting rod device is connected to the ends of each movable steel sleeper and the ends of two fixed steel sleepers arranged adjacent to the movable steel sleepers. Its shortcomings are: the track of this patent application is always in a connected state. When a ship in the river needs to pass through the river, the track cannot be disconnected at the beam seam position, and the basic rail cannot be retracted as expected under the drive of external force to achieve complete disconnection of the track at the beam end position and the opening and rotation of the bridge. Summary of the Invention

[0005] Design purpose: In view of the problems existing in the background art, a beam end rail expansion device and expansion method for opening bridge are designed, which can rotate the bridge deck by 90° and be parallel to the river, so that the ships in the river can pass smoothly, and when the bridge deck is connected, the track is connected to meet the driving requirements.

[0006] Design scheme: In order to achieve the above design purpose, the rail expansion device is laid on the two-span bridge deck, the bridge deck can be rotated by 90° and be parallel to the river, so that the ships in the river can pass smoothly. When the bridge deck is connected, the expansion end track on one span is extended to the basic track, which is connected with the track of the other span, so that the track is connected to meet the driving requirements; when the bridge deck needs to be opened, the expansion end basic track is retracted to the initial position, so that the track is disconnected at the gap between the two spans, and the bridge deck is opened in the reverse direction to be parallel to the river. The front end of the basic track of the conventional rail expansion device is fixedly connected with the track, and the basic track is expanded under the action of temperature force, so that the track line is always in the connected open state.

[0007] The expansion device designed by the present application is based on the principle of the conventional rail expansion regulator. Because the rail is moved and expanded under the temperature difference of the beam body, the temperature force of the track on the bridge is dissipated, thereby reducing the longitudinal force of the track and the bridge pier itself. The present application uses an external force driving device to pull the basic track to expand, so that the basic track is connected and locked with the fixed end track, and the purpose of track traffic demand is achieved. Compared with the conventional rail expansion regulator, the external force driving expansion track can effectively control the connection and disconnection of the track, and realize the requirement of bridge rotation opening. The principle of the conventional rail expansion regulator is the expansion of the basic track, but the present application relies on external force driving and can control the effective expansion of the basic track to ensure the operation of the track line.

[0008] 1. Design principle of the scheme: when the train passes, the bridge deck is rotated to be connected, the expansion end uses a driving device to pull the basic track to expand, so that the basic track is connected and locked with the fixed end track, and the track traffic demand is met; after the train passes, the expansion end basic track is unlocked, and the driving device is used to pull the basic track back to the original position, so that the track line is disconnected, the bridge deck is rotated to be disconnected, and the river navigation is met.

[0009] 2. Structure design of the scheme: the rail expansion device mainly consists of a fixed end and an expansion end. The fixed end consists of a guide rail, an auxiliary connecting rail, a locking system, a steel frog sleeper and the like, the guide rail and the auxiliary connecting rail are connected and fixed through a pad, a spacer and the like, and the locking system is fixed on the upper surface of the steel frog sleeper. The expansion end consists of a basic track, a point rail, a main connecting rail, a driving device and the like, the basic track and the main connecting rail are connected and fixed through a pad, a spacer and the like, and the driving device is fixed on the main structure of the bridge deck; the basic track and the point rail are fixed together through a pad, the basic track can be pulled to expand, the point rail is fixed, the tail end of the point rail is connected with the track line to meet the driving requirements.

[0010] Technical solution 1: a rail expansion device for the end of the beam of the opening bridge, which is composed of a fixed end and an expansion end, and the fixed end and the expansion end are respectively located on two bridge decks of the bridge, a large-span gap is arranged in the middle of the bridge deck, the bridge deck can be rotated and opened to meet the needs of river navigation; the expansion end includes a rail expander and a mechanical device, when the two bridge decks are rotated to the connected state, the basic rail of the rail expander is pulled by the mechanical device, so that the basic rail moves and expands under the driving of external force, and is connected and locked with the fixed end track, thereby ensuring the train passing.

[0011] Technical solution 2: a rail expansion method for the end of the beam of the opening bridge, when the track needs to be connected, the expansion end driving device pulls the expansion end basic rail to longitudinally expand, so that the basic rail is connected with the fixed end guide rail, after the connection, the fixed end locking system locks the expansion end basic rail, the track is connected, and the train running demand is met; after the train passes, the fixed end locking system releases the locking signal, the expansion end basic rail returns to the original initial state under the action of the driving device, the track line is disconnected, the bridge deck is rotated and disconnected, and the river navigation is met.

[0012] Compared with the background art, the expansion device of the present application uses an external force driving device to pull and expand the basic rail, so that the basic rail is connected and locked with the fixed end track, and the purpose of line traffic demand is achieved. Compared with the traditional rail expansion regulator, the external force driving expansion track can effectively control the connection and disconnection of the track, realize the demand of opening the bridge, and ensure the operation of the track line. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a schematic view of a rail expansion device for the end of the beam of the opening bridge. DETAILED DESCRIPTION

[0014] Example 1: refer to the attached Figure 1 A rail expansion device for the end of the beam of the opening bridge is composed of a fixed end and an expansion end, and the fixed end and the expansion end are respectively located on two bridge decks of the bridge, a large-span gap is arranged in the middle of the bridge deck, the bridge deck can be rotated and opened to meet the needs of river navigation; the expansion end includes a rail expander and a mechanical device, when the two bridge decks are rotated to the connected state, the basic rail of the rail expander is pulled by the mechanical device, so that the basic rail moves and expands under the driving of external force, and is connected and locked with the fixed end track, thereby ensuring the train passing.

[0015] The rail expansion device is laid on two span bridge decks, the bridge decks can be rotated by 90°, parallel to the river, and the ships can pass through the river smoothly; when the bridge decks are connected, the expansion end rail of one span is extended to the basic rail, connected with the rail of the other span, realizing the connection of the rails and meeting the driving requirements; when the bridge decks need to be opened, the expansion end basic rail is retracted to the initial position, realizing the disconnection of the rails at the gap between the two spans, and the two spans of the bridge decks are rotated in the opposite direction to be opened to the direction parallel to the river.

[0016] The rail expansion device is driven by an external force driving device to pull and expand the basic rail, so that the basic rail is connected and locked with the fixed end rail, and the line driving requirement is met.

[0017] The expansion end is composed of a basic rail 1, a pointed rail 2, a main connecting rail 3, an auxiliary connecting rail 4, a guide rail 5, a locking system 6 and a driving device 7. The basic rail 1 and the main connecting rail 3 are connected and fixed by a spacer and a spacer iron. The driving device 7 is fixed on the main structure of the bridge deck. The basic rail 1 and the pointed rail 2 are fixed together by a spacer. The basic rail 1 can be pulled and expanded, and the pointed rail 2 is fixed. The end of the pointed rail 2 is connected with the line to meet the driving requirements.

[0018] In example 2, on the basis of example 1, a rail expansion method for the beam end rail expansion device of an open bridge is provided. When the rails need to be connected, the expansion end driving device 7 pulls and expands the expansion end basic rail 1 longitudinally, so that the basic rail 1 is connected with the fixed end guide rail 5. After connection, the fixed end locking system 6 locks the expansion end basic rail 1, the rails are connected, and the driving requirements are met. After the train passes, the fixed end locking system 6 is unlocked, the expansion end basic rail 1 is retracted to the original initial state under the action of the driving device 7, the rail line is disconnected, the bridge deck is rotated and disconnected, and the river navigation is met.

[0019] The driving device can be driven by mechanical linkages, cam mechanisms, gear transmissions, rack transmissions, hydraulic drives, etc. This patent only describes the expansion of the basic rail under the traction of the external force mechanical device, and does not specify the type of external force mechanical device. The working principle is that the external force mechanical device is fixedly connected with the basic rail, and the basic rail is expanded and retracted.

[0020] The locking system can be locked by mechanical fixation, electromagnetic induction, signal induction, bolt mechanism, etc. This patent only describes the locking of the locking system after the basic rail is expanded and connected with the guide rail, and does not specify the type of locking system. The working principle is that the locking system locks the expanded and retracted basic rail in the connected state, and does not move freely.

[0021] It should be understood that the above examples, although the design idea of the present application has been described in detail, these textual descriptions are only simple textual descriptions of the design idea of the present application, and are not limitations of the design idea of the present application, and any combination, addition or modification not beyond the design idea of the present application falls within the protection scope of the present application.

Claims

1. A beam end rail expansion device for opening a bridge, characterized by The utility model discloses a bridge rail expansion device, which is composed of a fixed end and an expansion end, and the fixed end and the expansion end are respectively arranged on two bridge decks of a bridge.

2. The bridge end rail expansion joint for opening bridges according to claim 1, characterized in that: The rail expansion device is driven by an external force, and the basic rail is pulled to expand so as to be connected and locked with the fixed end rail, thereby meeting the traffic demand of the line.

3. A method of retracting the end rail of a bridge according to claim 1, characterized in that: When the rail needs to be connected, the expansion end driving device pulls the expansion end basic rail longitudinally to expand, so that the basic rail is connected with the fixed end guide rail. When the train passes, the fixed end locking system is unlocked, and the expansion end basic rail is retracted to the original initial state under the action of the driving device, so that the rail line is disconnected, and the bridge deck is rotated to be disconnected, thereby meeting the river navigation.

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