A longitudinal seamless expansion device for a suspended monorail track beam

Abstract

The present invention discloses a modular seamless expansion and contraction device for a suspended monorail track beam, which is suitable for large-span continuous track beams or multi-span continuous track beams, and is characterized in that the expansion and contraction device comprises a fixed plate fixedly installed at the ends of the track beams on both sides of the expansion joint, and a plurality of movable plates installed between the two fixed plates, and an inclined slideway is provided between the fixed plate and the adjacent movable plate, and between two adjacent movable plates, so that the movable plate moves in the horizontal direction and the track beam moves in the longitudinal direction through relative sliding along the inclined slideway, thereby realizing the change of the longitudinal expansion and contraction amount of the beam joint. The present invention provides a structural form of a large-deformation expansion and contraction device for large-span continuous track beams or multi-span continuous track beams in suspended monorail transportation, and solves the problem of uneven driving when the beam ends pass through the joints. The movable plates can be manufactured, processed and installed in a modular manner, which is conducive to rapid construction.

Description

Technical Field

[0001] The invention relates to a modular seamless expansion and contraction device for a suspended monorail track beam, belonging to the field of bridge engineering. Background Art

[0002] Suspended monorail transportation has the advantages of high space utilization, small footprint, strong line adaptability, and short construction period, and can well meet the needs of small and medium-volume urban tourism and commuter transportation. The vehicle is suspended under the track beam, and the track beam is supported on the bridge pier through a pin shaft or a support.

[0003] The bottom plate of the track beam directly serves as the sliding surface of the vehicle, and is a "beam-track integrated" structure. Under the influence of temperature, braking force and other service loads, the width of the beam gap at the ends of adjacent track beams will expand and contract, and a telescopic device needs to be installed at the end of the track beam. Due to the structural characteristics of "beam-track integrated", an excessively large gap width will cause obvious vibration and noise when the vehicle passes through the gap, affecting the stability and comfort of driving. Therefore, controlling the joint width of the beam end telescopic device is particularly important to improve the stability and comfort of suspended monorail driving.

[0004] At present, the telescopic devices of the existing suspended track beams include three types: seamless type, comb plate type, seamless type and comb plate combination type. Among them, the seamless telescopic device means that when the beam joint expands and contracts, the gap width between adjacent plates remains unchanged, which is close to a seamless structure. This form has better driving smoothness. However, the existing telescopic devices are all suspended monorail telescopic devices for general spans, and are not suitable for large-span beams or multi-span continuous beams with large deformation expansion joints.

[0005] The invention provides a modular seamless expansion device, which is suitable for large-deformation expansion joints of large-span continuous track beams or multi-span continuous beams in suspended monorail transportation. Summary of the invention

[0006] The present invention provides a modular seamless expansion and contraction device for a suspended monorail track beam, so as to meet the requirements of expansion and contraction deformation of the beam ends of a large-span continuous track beam or a multi-span continuous track beam in suspended monorail transportation, and to improve the smoothness and comfort of vehicles when traveling through a gap.

[0007] The object of the present invention can be achieved through the following technical scheme: a modular seamless expansion and contraction device for a suspended monorail track beam, suitable for large-span continuous track beams or multi-span continuous track beams, characterized in that the expansion and contraction device includes two fixed plates fixedly installed at the ends of the track beam on both sides of the expansion joint, and a plurality of movable plates installed between the two fixed plates, an inclined slideway is provided between the fixed plate and the adjacent movable plate, and between two adjacent movable plates, and the fixed plate and the adjacent movable plate, and the two adjacent movable plates are slidably connected by the inclined slideway, and the movable plate moves horizontally and the track beam moves longitudinally by relative sliding along the inclined slideway, thereby realizing the change of the longitudinal expansion and contraction amount of the beam joint.

[0008] Furthermore, the fixed plates are fixed to the track beam bottom plates, the movable plates are placed on the track beam bottom plates, and low-friction elastic material pads are arranged between the bottom of the movable plates and the track beam bottom plates. Since sliding occurs between the bottom of the movable plates and the track beam bottom plates, low-friction elastic material pads are arranged between the bottom of the movable plates and the track beam bottom plates to allow the beam gap to freely expand and contract.

[0009] Furthermore, a transverse limit block is provided on the inner side of the track beam bottom reinforcement plate so as to constrain the movement range of the movable plate within the width range of the track beam bottom plate and coordinate the transverse movement of each movable plate.

[0010] Furthermore, the board surface of each movable board is in an isosceles trapezoidal shape, the fixed board has a bevel corresponding to the movable board, and the oblique slideway is arranged at the bevel position of the fixed board and the movable board.

[0011] Furthermore, the inclined slide is that a protrusion is provided at the bottom of the side of one of the adjacent plates, and a corresponding groove is provided at a corresponding position on the top of the other adjacent plate, so that the protrusion can slide in the track formed by the recessed portion.

[0012] Furthermore, the oblique slide is that a pin hole is provided on the side of one of the adjacent plates, a pin is fixed in the pin hole, and a long strip slide groove is provided along the oblique edge of the side of the other of the adjacent plates, the pin is located in the slide groove of the other plate, so that the slide groove of the other plate can slide obliquely along the pin.

[0013] Furthermore, the track beam comprises a track beam web located on both sides, a track beam end web reinforcement plate is also provided on the outer side of the track beam web, a track beam bottom plate extending in the direction of the track beam center line is provided at the bottom of the track beam web, a track beam bottom reinforcement plate is provided at the end of the track beam bottom plate, a fixed plate is fixed on the track beam bottom reinforcement plate, and a first movable plate and a second movable plate are provided between the fixed plates on both sides of the expansion joint, the first movable plate is an upper bottom with a smaller length toward the track web side, and a lower bottom with a larger length toward the track center line side; the second movable plate is a lower bottom with a larger length toward the track web side, and an upper bottom with a smaller length toward the track center line side; when the distance between the track beams increases, longitudinal displacement in different directions occurs between the front and rear span bottom reinforcement plates and the fixed plates, and the gap becomes larger. At this time, due to the connection of the slideway, the first movable plate and the second movable plate move along the slideway, and the movable plate moves laterally as a whole, wherein the first movable plate moves toward the web side, and the second movable plate moves toward the track beam center line side, thereby achieving the effect of enlarging the beam gap.

[0014] Adjacent plates can select the number of movable plates (not less than 2) according to the expansion and contraction requirements, which can meet the use requirements of large deformation expansion joints. Both movable plates and fixed plates are supported vertically by the bottom plate of the track beam. When the beam joint expands and contracts, the longitudinal seam width between the plates remains unchanged, and there are multiple slideway joints, which have stronger adaptability to the torsional deformation of the beam end, the horizontal angle of the beam end, and the vertical angle deformation, which can significantly improve the smoothness and comfort of driving.

[0015] Furthermore, when the beam seam of the track beam expands and contracts longitudinally, the two oblique edges of the movable plate move along the slideway, so that the movable plate moves laterally as a whole, and its characteristics are as follows: 1) This structure ensures that when the beam seam of the track beam expands and contracts, the width of the oblique seam where adjacent plates meet remains unchanged, and the seam width only needs to meet the component installation requirements, which is close to seamless plates in use. 2) When the movable plate has the maximum seam width and the minimum seam width, it is located within the effective width range of the vehicle running wheels to ensure that the wheels do not fall off.

[0016] Compared with the prior art, the present invention has the advantages of:

[0017] 1. Satisfy the automatic expansion and contraction deformation requirements of large deformation expansion and contraction devices under use load. Since each movable plate can only move horizontally within the width of the wheel, the corresponding beam gap change is limited, so a single movable plate form can only be applied to the beam gap of general small and medium span track beams. The present invention can meet the expansion joint deformation requirements of large span or multi-span continuous beams by modularizing multiple movable plate devices.

[0018] 2. For large-span rail beams or multi-span continuous rail beams, the modular seamless telescopic device of the present invention has multiple slideway joints, which has a stronger adaptability to beam end torsional deformation, beam end transverse angle deformation, vertical angle deformation, etc., thereby improving the stability and comfort of driving;

[0019] 3. Modular expansion joints can select a reasonable number of movable plates according to actual needs, and the movable plates can be manufactured, processed and installed in a modular manner, which is conducive to rapid construction.

[0020] 4. The limit block on the opening side of the bottom plate can constrain the moving range of the movable plate within the width of the bottom plate and coordinate the lateral movement of each movable plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional schematic diagram of the installation and fixing end plate of the present invention.

[0022] Figure 2 It is a cross-sectional schematic diagram of the installation movable plate of the present invention.

[0023] Figure 3 It is a plan view of the modular telescopic device of the present invention in the minimum gap width state (two movable plates).

[0024] Figure 4 It is a plan view of the modular telescopic device of the present invention in the state of maximum seam width (two movable plates).

[0025] Figure 5 It is a plan view of the modular telescopic device of the present invention in the state of maximum seam width (three movable plates).

[0026] Figure 6 It is a cross-sectional schematic diagram of a slideway with an L-shaped structure at the plate end of the present invention.

[0027] Figure 7 It is a cross-sectional schematic diagram of a slideway in the form of a pin bolt according to the present invention.

[0028] Figure 8 It is a plan view of a slideway in the form of a pin in the present invention.

[0029] Fig. 9 It is a cross-sectional schematic diagram of the transverse limiting block of the movable plate of the present invention. DETAILED DESCRIPTION

[0030] The features of the present invention are further described in detail below by way of embodiments in conjunction with the accompanying drawings:

[0031] like Figure 1 , the markings in the figure are: track beam web 1, track beam bottom plate 2, track beam bottom plate stiffener 3, track beam beam end web reinforcement plate 11, track beam beam end bottom plate reinforcement plate 12, the telescopic device includes two fixed plates 4 fixedly installed at the end portions of the track beam on both sides of the expansion joint, and a first movable plate 51 and a second movable plate 52 installed between the two fixed plates 4, a slideway 6, a low-friction elastic material pad 7, and a lateral limit block 8.

[0032] like Figure 1~Figure 5 The track beam comprises a track beam web 1 located on both sides, and a track beam end web reinforcement plate 11 is also provided on the outer side of the track beam web 1. A track beam bottom plate 2 extending toward the center line of the track beam is provided at the bottom of the track beam web 1. The ends of the track beam bottom plates 2 of the front and rear spans are provided with track beam bottom reinforcement plates 12 respectively. Two fixed plates 4 are respectively installed on the track beam bottom reinforcement plates 12 of the front and rear spans by bolts. The first movable plate 51 and the second movable plate 52 are installed on the track beam bottom reinforcement plates 12 through low friction elastic material pads 7. The adjacent two fixed plates and movable plates are connected by an oblique slide 6. The plate surface of each movable plate is an isosceles trapezoid, and the fixed plate has an oblique side corresponding to the movable plate. The oblique slide is provided at the oblique side position of the fixed plate and the movable plate. The first movable plate has a smaller upper bottom facing the track web side and a larger lower bottom facing the track center line side; the second movable plate has a larger lower bottom facing the track web side and a smaller upper bottom facing the track center line side.

[0033] The inclined slideway 6 is a structure to ensure that adjacent plates move relative to each other along the inclined edge. The structure of the inclined slideway can be in various forms. Method 1: Figure 6 , the bevels of adjacent plates adopt matching positive L-shaped and inverted L-shaped structures, that is, a convex part is set at the bottom of the side of one of the adjacent plates, and a corresponding groove part is set at the corresponding position of the top of the other plate, so that the convex part can slide in the track formed by the concave part. Figure 7 and Figure 8 The fixed plate 4 and the track beam bottom plate reinforcement plate 12 are fixed ends, both of which have overhead holes 21, and the pins are fixedly installed on them. The movable plate is a sliding end, and a slide groove 22 is set along the oblique edge. The slide groove of the movable plate is sleeved on the pin. When the beam seam is longitudinally expanded and contracted, the slide groove 22 on the movable plate slides obliquely, driving the movable plate to move left and right.

[0034] In the above two methods, the limit bolts can be increased or decreased according to actual needs, under the premise of ensuring that the movable plate can slide freely in the oblique direction.

[0035] The reinforcing plate 12 is provided with a limit block 8 on the lateral opening side. The limit block 8 constrains the movement range of the first movable plate 51 and the second movable plate 52 within the width range of the bottom plate, and can coordinate the lateral movement of the first movable plate 51 and the second movable plate 52.

[0036] Below through Figure 3 and Figure 4The situation when the beam gap widens is described by comparing the two. When the distance between the track beams increases, the front and rear span bottom reinforcement plates 12 and the fixed plate 4 are displaced in opposite directions longitudinally, and the gap becomes larger. At this time, due to the connection of the slideway, the first movable plate 51 and the second movable plate 52 move along the slideway 6, and the movable plate as a whole moves in the lateral direction, wherein the first movable plate 51 moves toward the web side, and the second movable plate 52 moves toward the center line side of the track beam, so as to achieve the effect of widening the beam gap. On the contrary, when the beam gap narrows, the first movable plate 51 and the second movable plate 52 are displaced in opposite directions.

[0037] Figure 3 and Figure 4 The figure shows the plan view of the minimum and maximum gap widths between the two movable plates and the front and rear span rail beams; Figure 5 The figure shows a plan view of three movable plates and the maximum gap width. During the change of the gap width, the movable plate is always within the effective width B of the vehicle running wheel to ensure that the wheel runs on the movable plate or fixed plate of the expansion joint without being loose.

[0038] When the width of the beam gap changes, the end of the track beam moves longitudinally. Due to the connection of the slideway, the oblique edges of the first movable plate 51 and the second movable plate 52 move along the slideway, and the movable plate moves horizontally as a whole. Therefore, when the beam gap of the track beam expands and contracts, the width of the oblique edge gap between adjacent plates remains unchanged. The width of the gap only needs to meet the component installation requirements, and it is close to a seamless plate in use.

[0039] The modular seamless expansion joint of the present invention can meet the problem of smooth driving when a large-span continuous track beam or a multi-span continuous track beam passes through the gap at the beam end, and avoids severe vibration caused by the gap during the train movement. This structural form has a large deformation and expansion amount, is easy to install, and significantly improves the driving smoothness and comfort. In addition, the modular expansion joint of the present invention can be manufactured, processed and installed in a modular manner, which is conducive to rapid construction.

[0040] It is obvious that the above description and record are only examples and are not intended to limit the disclosure, application or use of the present invention. Although the embodiments have been described in the embodiments and described in the drawings, the present invention is not limited to the specific examples of the teachings of the present invention as the best mode currently considered by the drawings and described in the embodiments, and the scope of the present invention will include any embodiment falling within the previous description and the attached claims.

Claims

1. A modular seamless telescopic device for a suspended monorail track beam, suitable for large-span continuous track beams or multi-span continuous track beams, characterized in that The telescopic device comprises two fixed plates fixedly mounted on the ends of the track beams on both sides of the expansion joint, and a plurality of movable plates mounted between the two fixed plates. Oblique slideways are arranged between the fixed plates and the adjacent movable plates, and between two adjacent movable plates. The fixed plates and the adjacent movable plates, and between two adjacent movable plates, form a sliding connection through the oblique slideways. The movable plates move laterally and the track beams move longitudinally through relative sliding along the oblique slideways, thereby realizing the change of the longitudinal expansion and contraction amount of the beam joint. A transverse limit block is arranged on the inner side of the track beam bottom reinforcement plate, so as to constrain the movement range of the movable plates within the width range of the track beam bottom plate. The plate surface of each movable plate is an isosceles trapezoid. The fixed plate has an oblique side corresponding to the movable plate, and the oblique slideways are arranged at the oblique side positions of the fixed plates and the movable plates.

2. A modular seamless expansion and contraction device for a suspended monorail track beam as claimed in claim 1, characterized in that: The fixed plates are respectively fixed on the track beam bottom plates, the movable plates are placed on the track beam bottom plates, and low-friction elastic material pads are arranged between the bottom of the movable plates and the track beam bottom plates.

3. The modular seamless expansion device for a suspended monorail track beam according to claim 1, characterized in that: The oblique slideway is that a protrusion is provided at the bottom of the side of one of the adjacent plates, and a corresponding groove is provided at the corresponding position of the top of the other adjacent plate, so that the protrusion can slide in the track formed by the recessed part.

4. The modular seamless expansion device for a suspended monorail track beam according to claim 1, characterized in that: The oblique slide is that a pin hole is provided on the side of one of the adjacent plates, and a long strip slide groove is provided along the oblique edge of the side of the other of the adjacent plates. After the pin passes through the pin hole of one plate, it slides along the slide groove in the slide hole of the other plate.

5. The modular seamless expansion device for a suspended monorail track beam according to claim 1, characterized in that: The track beam comprises a track beam web at both sides, a track beam end web reinforcement plate is further provided on the outer side of the track beam web, a track beam bottom plate extending in the direction of the track beam center line is provided at the bottom of the track beam web, a track beam bottom reinforcement plate is provided at the end of the track beam bottom plate, a fixed plate is fixed on the track beam bottom reinforcement plate, a first movable plate and a second movable plate are provided between the fixed plates on both sides of the expansion joint, the first movable plate is an upper bottom with a smaller length toward the track web side, and a lower bottom with a larger length toward the track center line side; the second movable plate is a lower bottom with a larger length toward the track web side, and an upper bottom with a smaller length toward the track center line side; when the distance between the track beams increases, longitudinal displacement in different directions occurs between the front and rear span bottom reinforcement plates and the fixed plates, and the gap becomes larger, at this time, due to the connection of the slideway, the first movable plate and the second movable plate move along the slideway, and the movable plate moves laterally as a whole, wherein the first movable plate moves toward the web side, and the second movable plate moves toward the track beam center line side, so as to achieve the effect of increasing the beam gap.

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