Telescopic device suitable for movable bridge and installation method of telescopic device

Abstract

The invention discloses a telescopic device suitable for a movable bridge and a mounting method of the telescopic device. The device comprises a fixed pin shaft plate, a cross-seam comb plate and a fixed comb plate, the fixed pin shaft plate is fixed on the surface of the movable bridge, the fixed comb plate is fixed on the surface of the fixed bridge, a pin shaft is arranged at the end of the fixed pin shaft plate, one end of the cross-seam comb plate is hinged to the pin shaft, and the other end of the cross-seam comb plate is hinged to the fixed comb plate. And the other end of the cross-joint comb plate spans a gap between beams between the movable bridge and the fixed bridge and is in lap joint with the bridge surface of the fixed bridge. According to the invention, the bumping effect of the vehicle passing through the telescopic device can be obviously reduced, and safe, rapid and smooth driving is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge erection, and in particular relates to a telescopic device suitable for opening bridges. Background Art

[0002] In order to adapt to the non-cooperative deformation between the separated beams in the bridge superstructure, a telescopic device is usually set at the bridge deck where the adjacent beams are disconnected to ensure that there is no horizontal hollow gap on the bridge deck, ensuring the safety and smoothness of driving (similar to pedestrians). At present, the comb-tooth bridge telescopic device has become a common type of telescopic device due to its unique advantages. Its working principle is to set a pair of comb-tooth cover plates above the beam seam, with the comb teeth and the beam seam kept perpendicular, and the two cover plates are arranged alternately. Each cover plate is fixedly connected to the bridge deck on one side of the beam seam, and the other end is overlapped on the bridge deck on the other side, but without constraints. When relative movement occurs between the beams, the cover plate will slide freely on the top surface of the non-fixed end beam body driven by the fixed end beam body, which not only adapts to the relative displacement between the beam bodies, but also shields the beam seam to ensure the continuity and smoothness of the bridge deck.

[0003] However, for special bridge structures such as bascule bridges, their application scenarios are more complicated. Bascule bridges are a special type of bridge structure, which refers to a bridge whose main beam can be opened and closed by vertical rotation, horizontal rotation, lifting, etc. to meet the needs of both water and land transportation, so that ships can pass smoothly. Figure 1 As shown in the figure, taking the lifting type bascule bridge as an example, this type of bascule bridge is equipped with a bridge tower, and a lifting winch is set on the top of the tower. The drum is wound with several steel wire ropes, and the other end of the steel wire rope is connected to the main beam of the bascule bridge. The two-way rotation of the drum drives the main beam to rise and fall. When large ships need to pass under the bridge, the main beam of the bascule bridge is vertically lifted to a certain height to meet the navigation needs; when there is no navigation demand, the main beam of the bascule bridge is lowered to the lowest position to connect the land traffic on both sides.

[0004] For a bascule bridge, when the bridge is open, the pair of comb-shaped covers of the telescopic device between the open span and the non-open span should be able to detach from each other, and when the bridge is closed, the telescopic device should resume normal use. However, as mentioned above, the main support system of the bascule bridge is the steel wire rope suspended from the top of the tower. Unlike the fixed bridge with a non-open span, which is firmly fixed on a rigid foundation by a support, the steel wire rope is relatively flexible, resulting in significant changes in the elevation of the bascule at the beam joint under the action of loads such as cars and temperature. In addition, due to the limitation of mechanical control accuracy, the theoretical elevation cannot be fully reached after the bascule is closed, resulting in a slight elevation misalignment between the bascule at the beam joint and the adjacent non-open span bridge deck. If the telescopic device cannot adapt to this displacement, the car will jump when passing, seriously affecting driving safety and smoothness. Moreover, the telescopic device will inevitably be damaged after long-term use, greatly reducing its durability.

[0005] like Figure 2As shown, for vertical rotating bascule bridges, since conventional telescopic devices cannot adapt to the free rotation of bridges in the vertical plane, the telescopic devices are abandoned, sacrificing the safety and smoothness of driving; and for horizontal rotating and lifting bascule bridges, some functions are generally removed on the basis of conventional comb-tooth bridge telescopic devices, so that the comb-tooth cover plates on both sides can be separated from each other to adapt to the opening of the bridge. This partially solves the problem of driving safety, but does not solve the problem of smooth bridge deck. Therefore, inventing a telescopic device suitable for bascule bridges and its installation method, so that it can adapt to various bridge opening methods, and can adapt to the elevation dislocation of beam joints during closing and fit closely with the bridge decks on both sides, ensuring safe, fast and smooth driving, has become a problem that needs to be solved urgently. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology. In view of the problem that conventional telescopic devices cannot adapt to the free rotation of vertical-rotating opening bridges in the vertical plane, and the problem of vehicle jumping caused by the elevation misalignment of beam joints during the closing of horizontal-rotating and lifting opening bridges, a telescopic device suitable for opening bridges and its installation method are provided.

[0007] The technical solution adopted by the present invention is: a telescopic device suitable for an opening bridge, comprising a fixed pin plate, a cross-slot comb plate and a fixed comb plate, wherein the fixed pin plate is fixed to the bridge deck of the opening bridge, the fixed comb plate is fixed to the bridge deck of the fixed bridge, the pin is arranged at the end of the fixed pin plate, one end of the cross-slot comb plate is hinged to the pin, and the other end of the cross-slot comb plate spans the gap between the beams of the opening bridge and the fixed bridge and overlaps the bridge deck of the fixed bridge.

[0008] A further preferred structure is that the fixed pin shaft plate is an integral steel plate with a first comb tooth at one end, a first pin shaft hole cooperating with the pin shaft is provided at the first comb tooth at one end of the fixed pin shaft plate, and the other end of the fixed pin shaft plate is fixed to the bridge deck of the opening bridge by an anchor bolt.

[0009] In a further preferred structure, the cross-slot comb plate is an integral steel plate structure, one end of the cross-slot comb plate is provided with a second comb tooth meshing with the first comb tooth on the fixed pin shaft plate, the second comb tooth is arranged alternately with the first comb tooth, a second pin shaft hole matching with the pin shaft is provided at the second comb tooth at one end of the cross-slot comb plate, and a third comb tooth is provided at the other end of the cross-slot comb plate. The cross-slot comb plate can rotate freely around the pin shaft.

[0010] A further preferred structure is that the fixed comb plate is an integral steel plate structure, one end of the fixed comb plate is provided with fourth comb teeth which mesh with the third comb teeth on the span comb plate, the fourth comb teeth are arranged alternately with the third comb teeth, and the other end of the fixed comb plate is fixed to the fixed bridge deck by anchor bolts.

[0011] A further preferred structure is that the cross-slot comb plate is elastically connected to the bridge deck of the opening bridge through a tension spring and a fixed anchor ring, and the fixed anchor ring is pre-buried in the opening bridge body. The fixed anchor ring is an anchoring device for the tension spring, one end of which is pre-buried in the opening bridge body and the other end is a circular ring for fixing the tension spring.

[0012] A further preferred structure is that a buffer support is arranged in a second comb tooth reserved groove at one end of the cross-slot comb tooth plate, a stainless steel plate is arranged on the bridge deck of the fixed bridge, and the buffer support is freely overlapped on the surface of the stainless steel plate to form a sliding connection pair.

[0013] In a further preferred structure, a rubber pad is provided between the cross-gap comb plate and the bridge deck of the opening bridge.

[0014] A further preferred structure is that the pin is a steel round rod with threads at both ends. After being inserted into the pin hole formed by the staggered fixed pin plate and the cross-slit comb plate, nuts and caps are installed at both ends to assemble the three into a set.

[0015] A further preferred structure is that the tension spring is a limit spring of the span comb plate, and the tension spring is a mechanical spring with hooks at both ends. When in use, one end hooks the fixed anchor ring embedded in the opening bridge body, and the other end hooks the span comb plate, so that a reliable elastic connection can be formed between the span comb plate and the opening bridge body, limiting the span comb plate from always overlapping the fixed bridge deck during normal operation of the bridge.

[0016] A method for installing a telescopic device for an opening bridge comprises the following steps:

[0017] The fixed pin plate is fixed to the deck of the opening bridge through anchor bolts, the fixed comb plate is fixed to the deck of the fixed bridge through anchor bolts, one end of the cross-gap comb plate is hinged to the fixed pin plate through a pin, and the other end spans the gap between the beams of the opening bridge and the fixed bridge and overlaps the deck of the fixed bridge, and the cross-gap comb plate is elastically connected to the deck of the opening bridge through a tension spring and a fixed anchor ring;

[0018] When the opening bridge is opened, the cross-gap comb plate rotates through the pin shaft and is freely separated from the fixed bridge deck; when the opening bridge is closed, in the following three conditions: 1) the opening bridge deck and the fixed bridge deck are at the same elevation, 2) the opening bridge deck is higher than the fixed bridge deck, and 3) there is a corner at the end of the opening bridge, the cross-gap comb plate is always freely overlapped on the fixed bridge deck under the action of its own weight, thereby ensuring a smooth bridge deck.

[0019] The present invention utilizes the characteristic that the cross-gap comb plate can rotate freely around the pin shaft to achieve close fit between the cross-gap comb plate and the fixed bridge deck. Based on this function, when the opening bridge is opened, the cross-gap comb plate can be freely separated from the fixed bridge deck regardless of the opening mode; when the opening bridge is closed, no matter there is elevation misalignment or angle misalignment between the opening bridge deck and the fixed bridge deck, the surface of the telescopic device can remain smooth, which can significantly reduce the vehicle jumping effect when passing through the telescopic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of an existing lifting bascule bridge;

[0021] Figure 2 This is a schematic diagram of an existing vertical swing bascule bridge;

[0022] Figure 3 This is a schematic diagram of the elevation layout of the expansion and contraction device of the bascule bridge;

[0023] Figure 4 This is a schematic diagram of the plan layout of the expansion and contraction device of the bascule bridge;

[0024] Figure 5 It is a schematic elevation diagram of the expansion and contraction device of the bascule bridge when the bridge is in the open state;

[0025] Figure 6 It is a schematic elevation diagram of the telescopic device of the bascule bridge when the bridge is in a closed state and the bridge deck elevation of the bascule bridge is higher than that of the fixed bridge;

[0026] Figure 7 It is a schematic elevation diagram of the expansion and contraction device of the bascule bridge in the closed state of the bridge and in the state where there is a corner at the end of the bascule bridge;

[0027] Figure 8 A large-scale drawing of the fixing pin plate of the telescopic device of the opening bridge;

[0028] Fig. 9 This is the large-scale drawing of the comb plate across the gap of the expansion and contraction device of the bascule bridge;

[0029] Fig.10 Large-scale drawing of the comb plate for fixing the telescopic device of the opening bridge.

[0030] In the figure: 1-fixed pin plate (1-1-first comb tooth, 1-2-first pin hole), 2-span comb plate (2-1-second comb tooth, 2-2-second pin hole, 2-3-third pin hole), 3-fixed comb plate (3-1-third comb tooth), 4-pin, 5-anchor bolt, 6-tension spring, 7-buffer support, 8-stainless steel plate, 9-rubber pad, 10-fixed anchor ring, 11-opening bridge, A-fixed bridge, B-opening bridge, c-expansion joint position, d-gap between beams. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not constitute a limitation on the present invention.

[0032] Embodiment 1:

[0033] like Figure 3-4 As shown, the present invention is a telescopic device suitable for an opening bridge, comprising a fixed pin plate 1, a cross-gap comb plate 2 and a fixed comb plate 3, wherein the fixed pin plate 1 is fixed to the bridge deck of the opening bridge B, the fixed comb plate 3 is fixed to the bridge deck of the fixed bridge A, the pin 4 is arranged at the end of the fixed pin plate 1, one end of the cross-gap comb plate 2 is hinged to the pin 4, and the other end of the cross-gap comb plate 2 spans the inter-beam gap d between the opening bridge B and the fixed bridge A and overlaps the bridge deck of the fixed bridge A. The fixed pin plate 1, the cross-gap comb plate 2 and the fixed comb plate 3 are the main telescopic structures of the telescopic device, and their basic forms are all steel plates with comb teeth. After the fixed pin plate 1, the cross-gap comb plate 2 and the pin 4 are assembled, a movable mechanism is formed, so that the cross-gap comb plate 2 can rotate freely around the pin 4 but cannot move horizontally.

[0034] In some optional embodiments, such as Figure 4 , Figure 8 As shown, the fixed pin shaft plate 1 is an integral steel plate with a first comb tooth 1-1 at one end, and a first pin shaft hole 1-2 cooperating with the pin shaft 4 is opened at the first comb tooth 1-1 at one end of the fixed pin shaft plate 1. The other end of the fixed pin shaft plate 1 is fixed to the bridge deck of the opening bridge B by an anchor bolt 5 to prevent the fixed pin shaft plate 1 and the fixed comb tooth plate 3 from shifting under the impact of the vehicle.

[0035] In some optional embodiments, such as Figure 4 , Fig. 9 As shown, the cross-slot comb plate 2 is an integral steel plate structure, and one end of the cross-slot comb plate 2 is provided with a second comb tooth 2-1 meshing with the first comb tooth 1-1 on the fixed pin shaft plate 1, and the second comb tooth 2-1 is arranged alternately with the first comb tooth 1-1, and the two can move relative to each other when the bridge is extended or retracted, and the two can be separated freely when the bridge is opened, and the second comb tooth 2-1 at one end of the cross-slot comb plate 2 is provided with a second pin shaft hole 2-2 that matches the pin shaft 4, and the other end of the cross-slot comb plate 2 is provided with a third comb tooth 2-3. The cross-slot comb plate 2 can rotate freely around the pin shaft 4.

[0036] In some optional embodiments, such as Figure 4 , Fig.10 As shown, the fixed comb plate 3 is an integral steel plate structure, and one end of the fixed comb plate 3 is provided with a fourth comb tooth 3-1 meshing with the third comb tooth 2-3 on the span comb plate 2, and the fourth comb tooth 3-1 is arranged alternately with the third comb tooth 2-3, and the two can move relative to each other when the bridge is extended or retracted, and the two can be freely separated when the bridge is opened, and the other end of the fixed comb plate 3 is fixed to the bridge deck of the fixed bridge A by an anchor bolt 5.

[0037] In some optional embodiments, the cross-gap comb plate 2 is elastically connected to the bridge deck of the opening bridge B through the tension spring 6 and the fixed anchor ring 10, which can limit the cross-gap comb plate 2 to always be overlapped on the bridge deck of the fixed bridge A during normal operation of the bridge. The fixed anchor ring 10 is embedded in the beam body of the opening bridge B. The fixed anchor ring 10 is an anchoring device of the tension spring 6, one end of which is embedded in the beam body of the opening bridge B, and the other end is a circular ring for fixing the tension spring 6.

[0038] In some optional embodiments, a buffer support 7 is provided in a reserved groove with a second comb tooth 2-1 at one end of the cross-slot comb plate 2, a stainless steel plate 8 is provided on the fixed bridge A bridge deck, and the buffer support 7 is freely overlapped on the surface of the stainless steel plate 8 to form a sliding connection pair. During the expansion and contraction process of the bridge, the cross-slot comb plate 2 drives the buffer support 7 to slide freely on the surface of the stainless steel plate 8, and at the same time, the buffer support 7 will limit the vertical movement of the cross-slot comb plate 2. The buffer support 7 can fill the gap between the contact part of the cross-slot comb plate 2 and the stainless steel plate 8 through its own extrusion deformation under external force, and rely on its own buffering performance to effectively reduce the impact vibration of the vehicle when passing the expansion and contraction device, thereby ensuring the smoothness of the bridge deck and reducing the vehicle jumping effect.

[0039] In some optional embodiments, a rubber pad 9 is arranged between the cross-gap comb plate 2 and the bridge deck of the opening bridge B. The rubber pad 9 is a flexible cushion layer that acts as a buffer to prevent the cross-gap comb plate 2 from rigidly colliding with the bridge deck of the opening bridge B under the impact of wheels and thus causing damage.

[0040] In some optional embodiments, the pin 4 is a steel round bar with threads at both ends, which is inserted into the pin hole formed by the staggered fixed pin plate 1 and the cross-slot comb plate 2, and nuts and caps are installed at both ends to assemble the three into a set. A safety pin is set at one end of the pin 4 to prevent the pin from loosening after assembly.

[0041] In some optional embodiments, the tension spring 6 is a limit spring of the span comb plate 2. The tension spring 6 is a mechanical spring with hooks at both ends. When in use, one end hooks the fixed anchor ring 10 embedded in the beam body of the opening bridge B, and the other end hooks the span comb plate 2. A reliable elastic connection can be formed between the span comb plate 2 and the beam body of the opening bridge B, limiting the span comb plate 2 to always overlap the bridge deck of the fixed bridge A during normal operation of the bridge.

[0042] In some optional embodiments, the buffer support 7 is a buffering measure between the cross-slot comb plate 2 and the bridge deck of the fixed bridge A, and is in the form of an elastic support with good buffering performance. Preferably, high damping rubber can be used. The buffer support 7 can slide freely on the surface of the stainless steel plate 8, without hindering the longitudinal movement of the cross-slot comb plate 2, but limiting its vertical movement. The buffer support 7 can fill the gap between the cross-slot comb plate 2 and the stainless steel plate 8 through its own extrusion deformation under external force, and rely on its own buffering performance to effectively reduce the impact vibration of the vehicle when passing the telescopic device, thereby ensuring the smoothness of the bridge deck and reducing the vehicle jumping effect.

[0043] In some optional embodiments, the stainless steel plate 8 is anchored to the fixed bridge deck, has a smooth and corrosion-resistant surface, and forms a sliding connection pair with the buffer bearing.

[0044] Embodiment 2:

[0045] A method for installing a telescopic device for an opening bridge comprises the following steps:

[0046] The fixed pin plate 1 is fixed to the bridge deck of the opening bridge B by means of anchor bolts 5, the fixed comb plate 3 is fixed to the bridge deck of the fixed bridge A by means of anchor bolts 5, one end of the cross-gap comb plate 2 is hinged to the fixed pin plate 1 by means of a pin 4, and the other end spans the inter-beam gap d between the opening bridge B and the fixed bridge A and overlaps the bridge deck of the fixed bridge A, the cross-gap comb plate 2 is elastically connected to the bridge deck of the opening bridge B by means of a tension spring 6 and a fixed anchor ring 10.

[0047] If you need to open the bridge, Figure 5 As shown, the cross-slot comb plate 2 and the fixed comb plate 3 of the present invention can be separated freely, the cross-slot comb plate 2 is lifted as a whole with the opening bridge, and the fixed comb plate 3 is retained on the bridge deck of the fixed bridge A. The tension spring 6 arranged under the cross-slot comb plate 2 has a certain supporting effect on the cross-slot comb plate 2 to prevent it from deflecting too much.

[0048] When the open bridge B is closed, the bridge operates normally, that is, vehicles are driving on the bridge deck. At this time, there are three possible operating states: ① The bridge deck of the open bridge B is consistent with the bridge deck of the fixed bridge A, such as Figure 3 As shown; ② The deck of the open bridge B is slightly higher than the deck of the fixed bridge A. Figure 6 As shown; ② There is a corner at the end of beam B of the open bridge, such as Figure 7 As shown (limited bearings are generally provided below the opening bridge B, so the opening bridge deck will not be lower than the fixed bridge deck A). In the above three operating states, the feature of the cross-gap comb plate 2 being able to rotate freely around the pin 4 can be utilized to ensure that one end of the cross-gap comb plate 2 is always closely overlapped and fitted with the surface of the stainless steel plate 8, and the surface of the telescopic device is always kept smooth, thereby significantly reducing the vehicle jumping effect when passing through the telescopic device.

[0049] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A telescopic device suitable for a bascule bridge, characterized in that: The invention comprises a fixed pin shaft plate (1), a cross-gap comb plate (2) and a fixed comb plate (3), wherein the fixed pin shaft plate (1) is fixed to the bridge deck of an opening bridge (B), the fixed comb plate (3) is fixed to the bridge deck of a fixed bridge (A), a pin shaft (4) is arranged at the end of the fixed pin shaft plate (1), one end of the cross-gap comb plate (2) is hinged to the pin shaft (4), and the other end of the cross-gap comb plate (2) spans the inter-beam gap (d) between the opening bridge (B) and the fixed bridge (A) and overlaps the bridge deck of the fixed bridge (A).

2. A telescopic device suitable for a bascule bridge according to claim 1, characterized in that: The fixed pin shaft plate (1) is an integral steel plate with a first comb tooth (1-1) at one end. A first pin shaft hole (1-2) cooperating with a pin shaft (4) is provided at the first comb tooth (1-1) at one end of the fixed pin shaft plate (1). The other end of the fixed pin shaft plate (1) is fixed to the bridge deck of the opening bridge (B) by means of an anchor bolt (5).

3. The telescopic device suitable for a bascule bridge according to claim 2, characterized in that: The cross-slot comb tooth plate (2) is an integral steel plate structure, and one end of the cross-slot comb tooth plate (2) is provided with a second comb tooth (2-1) meshing with the first comb tooth (1-1) on the fixed pin shaft plate (1), and the second comb tooth (2-1) and the first comb tooth (1-1) are arranged alternately, and a second pin shaft hole (2-2) cooperating with the pin shaft (4) is provided at the second comb tooth (2-1) at one end of the cross-slot comb tooth plate (2), and a third comb tooth (2-3) is provided at the other end of the cross-slot comb tooth plate (2).

4. The telescopic device for a bascule bridge according to claim 3, characterized in that: The fixed comb plate (3) is an integral steel plate structure, one end of the fixed comb plate (3) is provided with fourth comb teeth (3-1) meshing with third comb teeth (2-3) on the span comb plate (2), the fourth comb teeth (3-1) and the third comb teeth (2-3) are arranged alternately, and the other end of the fixed comb plate (3) is fixed to the deck of the fixed bridge (A) by means of anchor bolts (5).

5. The telescopic device for a bascule bridge according to claim 4, characterized in that: The cross-gap comb plate (2) is elastically connected to the bridge deck of the opening bridge (B) through a tension spring (6) and a fixed anchor ring (10); the fixed anchor ring (10) is pre-buried in the beam body of the opening bridge (B); the fixed anchor ring (10) is an anchoring device for the tension spring (6), one end of which is pre-buried in the beam body of the opening bridge (B) and the other end of which is a circular ring for fixing the tension spring (6).

6. The telescopic device for a bascule bridge according to claim 3, characterized in that: A buffer support (7) is arranged in a reserved groove of a second comb tooth (2-1) at one end of the cross-gap comb plate (2), a stainless steel plate (8) is arranged on the deck of the fixed bridge (A), and the buffer support (7) is freely overlapped on the surface of the stainless steel plate (8) to form a sliding connection pair.

7. The telescopic device for a bascule bridge according to claim 1, characterized in that: A rubber pad (9) is arranged between the cross-gap comb plate (2) and the bridge deck of the opening bridge (B).

8. The telescopic device for a bascule bridge according to claim 1, characterized in that: The pin shaft (4) is a steel round bar with threads at both ends. After being inserted into the pin shaft hole formed by the fixed pin shaft plate (1) and the cross-slot comb plate (2), nuts and caps are installed at both ends.

9. The telescopic device for a bascule bridge according to claim 5, characterized in that: The tension spring (6) is a limit spring of the cross-slot comb plate (2). The tension spring (6) is a mechanical spring with hooks at both ends, one end of which hooks a fixed anchor ring (10) embedded in the beam body of the opening bridge (B), and the other end of which hooks the cross-slot comb plate (2).

10. The installation method of the telescopic device for a bascule bridge according to claim 1, characterized in that: The following steps are involved: The fixed pin plate (1) is fixed to the bridge deck of the opening bridge (B) by means of anchor bolts (5), the fixed comb plate (3) is fixed to the bridge deck of the fixed bridge (A) by means of anchor bolts (5), one end of the cross-gap comb plate (2) is hinged to the fixed pin plate (1) by means of a pin (4), and the other end thereof spans the inter-beam gap (d) between the opening bridge (B) and the fixed bridge (A) to overlap the bridge deck of the fixed bridge (A), and the cross-gap comb plate (2) is elastically connected to the bridge deck of the opening bridge (B) by means of a tension spring (6) and a fixed anchor ring (10); When the opening bridge (B) is opened, the cross-gap comb plate (2) rotates through the pin shaft (4) and is freely separated from the bridge deck of the fixed bridge (A); when the opening bridge (B) is closed, in the following three states: 1) the bridge deck of the opening bridge (B) is consistent with the bridge deck of the fixed bridge (A), 2) the bridge deck of the opening bridge (B) is higher than the bridge deck of the fixed bridge (A), and 3) there is a rotation angle at the end of the beam of the opening bridge (B), the cross-gap comb plate (2) is always freely overlapped on the bridge deck of the fixed bridge (A) under the action of its own weight.

Images