Floating type bridge expansion device

Abstract

The invention relates to the technical field of bridge expansion devices, and provides a floating type bridge expansion device which comprises fixed toothed plates, floating toothed plates, a transverse supporting system and a longitudinal supporting system, mounting grooves are formed in the top ends of two beam bodies, and the multiple fixed toothed plates are fixedly mounted at the top end of each mounting groove; the top end of each installation groove is in lap joint with a plurality of floating toothed plates, each floating toothed plate is meshed with the corresponding fixed toothed plate in a staggered mode, a sliding groove is formed in each fixed toothed plate, a pulley is installed at the bottom end of each floating toothed plate, each pulley is in sliding fit with the corresponding sliding groove, and a plurality of transverse supporting systems are arranged between the two beam bodies. The transverse supporting systems are used for supporting the floating toothed plates, and the longitudinal supporting systems are installed between the two beam bodies and used for supporting the transverse supporting systems. By means of the technical scheme, the problems that in the prior art, a bridge expansion device is poor in vehicle passing comfort and safety are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge expansion and contraction devices, and in particular to a floating bridge expansion and contraction device. Background Art

[0002] The bridge expansion device is an important component of the bridge structure. It is usually installed between the two beam ends, between the beam end and the abutment, or at the hinged position of the bridge. It is mainly used to adapt to the expansion and contraction deformation of the bridge caused by factors such as temperature changes, concrete shrinkage creep, and uneven settlement of the bridge foundation, thereby ensuring the stability of the bridge structure and the comfort of driving.

[0003] The expansion device of a bridge mainly needs to meet the deformation requirements of the bridge in three directions, namely, the direction parallel to the axis of the bridge (longitudinal), the direction perpendicular to the axis of the bridge (transverse), and the direction perpendicular to the bridge deck (vertical). Among them, the longitudinal deformation of the bridge is usually caused by temperature changes, and the deformation is more obvious. The transverse deformation of the bridge is mainly caused by lateral loads such as wind, and the deformation is smaller. The vertical deformation of the bridge is related to the deadweight of the bridge and the bridge deck load, and the deformation is smaller.

[0004] Common structural forms of existing bridge expansion devices include modular expansion devices and comb-tooth plate expansion devices. Among them, modular expansion devices are widely used and have high load-bearing capacity and expansion performance, but the joint position is a series of transversely arranged steel sections, which cause large impact and high noise when vehicles pass through. The comb-tooth plate expansion device is mainly composed of two groups of interlaced comb plates, which can provide continuous support for the wheels. The vibration and noise are small when vehicles pass through, but the comb-tooth plates are prone to flexural deformation under long-term vehicle loads, affecting the safe passage of vehicles. Bridge expansion devices of other structural forms have limited application scope or have similar problems. Therefore, we propose a floating bridge expansion device. Summary of the invention

[0005] The present invention provides a floating bridge expansion device, which solves the problem of poor vehicle passing comfort and safety of the bridge expansion device in the prior art.

[0006] The technical solution of the present invention is as follows: A floating bridge expansion device is arranged between two beam bodies, including a fixed tooth plate, a floating tooth plate, a transverse support system and a longitudinal support system. The top ends of the two beam bodies are provided with installation grooves, and a plurality of the fixed tooth plates are fixedly installed on each of the installation grooves. A meshing groove 1 is provided in the middle of each of the fixed tooth plates, and a plurality of floating tooth plates are overlapped at the top ends of each of the installation grooves. A meshing groove 2 is provided in the middle of each of the floating tooth plates, and each of the floating tooth plates is staggered with the corresponding fixed tooth plate. Multiple groups of the transverse support systems are arranged between the two beam bodies, and the transverse support systems are used to support the multiple floating tooth plates. Multiple groups of the longitudinal support systems are installed between the two beam bodies, and the longitudinal support systems are used to support the transverse support systems.

[0007] Preferably, the longitudinal support system includes a support box, a clamping support one, a sliding support one and a longitudinal beam, a plurality of the support boxes are fixedly installed in each of the installation grooves, a cavity is opened inside each of the support boxes, the top and bottom ends of each of the cavities are respectively fixedly installed with the clamping support one and the sliding support one, a longitudinal beam is arranged between every two opposing support boxes, and each of the longitudinal beams is slidably matched with the corresponding clamping support one and the sliding support one.

[0008] Preferably, the transverse support system includes a crossbeam, a clamping support 2, a sliding support 2, a rotating support, a clamping support 3, a cover plate and a pin shaft, a plurality of the crossbeams are arranged between the two beam bodies, each of the crossbeams is provided with a plurality of through holes, the top and bottom ends of each of the through holes are fixedly installed with the clamping support 2 and the sliding support 2, each of the longitudinal beams passes through the corresponding through holes and slidably cooperates with the clamping support 2 and the sliding support 2, a plurality of grooves are opened at the top of each crossbeam, the rotating support is installed on each of the grooves, a supporting groove is opened at the top of each floating tooth plate, the clamping support 3 is arranged in each of the supporting grooves, the cover plate is fixedly installed at the top of each crossbeam, and a plurality of pin shafts are rotatably connected to each crossbeam, and each pin shaft passes through the corresponding rotating support, the floating tooth plate and the clamping support 3 and extends into the cover plate.

[0009] Furthermore, each of the fixed tooth plates is provided with a slide groove, and a pulley is installed at the bottom end of each of the floating tooth plates, and each of the pulleys is slidably matched with the corresponding slide groove.

[0010] Furthermore, a plurality of the longitudinal support systems are provided with drainage grooves at the bottom, and the drainage grooves are installed between two of the beam bodies.

[0011] Furthermore, the plurality of rotating supports, the third clamping support, the first sliding support and the first clamping support are all made of a material with deformation capability.

[0012] Furthermore, a plurality of limit pins are installed on the inner side wall of each through hole, and a limit seat is installed on both sides of each longitudinal beam, and the limit seat is clamped between the corresponding plurality of limit pins.

[0013] Furthermore, connecting plates are installed at both ends of each of the cross beams.

[0014] The working principle and beneficial effects of the present invention are:

[0015] 1. In the present invention, the floating bridge expansion device is arranged at the beam joint position reserved between the two beam bodies, the fixed tooth plate is fixedly installed on the installation groove at the top of the two beam bodies, one end of the floating tooth plate is overlapped on the top of the beam body and meshed with the fixed tooth plate, the other end of the floating tooth plate is rotatably connected to the transverse support system, and the longitudinal support system is installed between the two beam bodies for supporting the transverse support system.

[0016] 2. In the present invention, when the beam body undergoes longitudinal deformation, the side beam body drives the fixed tooth plate and the support box to move longitudinally, wherein the fixed tooth plate on this side moves toward the floating tooth plate, and the support box slides toward the longitudinal beam, thereby satisfying the longitudinal expansion and contraction deformation requirements of the beam body. If the deformation of the beam body is large, when the edge position of the slide groove on the fixed tooth plate contacts the pulley on the floating tooth plate, the fixed tooth plate on this side drives the floating tooth plate and the cross beam to move, and the cross beam can drive the floating tooth plate on the other side to move toward the fixed tooth plate on the other side. In the ordinary comb-tooth plate type telescopic device, the comb-tooth plates on both sides are combined in the middle position of the beam seam, and the maximum longitudinal expansion and contraction of the bridge is small. In the present invention, the floating tooth plate is arranged between the two beam bodies, and can move with the transverse support system until it is fully extended into the meshing grooves of the fixed tooth plates on both sides. Compared with the ordinary comb-tooth plate type telescopic device, under the same bridge span, the longitudinal deformation expansion and contraction of the floating bridge telescopic device is larger.

[0017] 3. In the present invention, when the beam body undergoes lateral deformation, the side beam body drives the fixed tooth plate and the support box to move laterally, wherein the fixed tooth plate on this side drives the floating tooth plate to move laterally, the support box slides laterally relative to the longitudinal beam, and the floating tooth plate on this side rotates slightly in the horizontal direction relative to the lateral support system, thereby meeting the lateral deformation requirements of the beam body.

[0018] 4. In the present invention, when the beam body undergoes vertical deformation, the side beam body drives the fixed tooth plate, the floating tooth plate and the support box to move in the vertical direction. The floating tooth plate on this side moves slightly in the vertical direction relative to the transverse support system, and the support box moves slightly in the vertical direction relative to the longitudinal beam, thereby meeting the vertical deformation requirements of the beam body.

[0019] 5. Compared with the existing bridge expansion devices with poor comfort and safety of vehicle traffic, in the present invention, when the beam body undergoes longitudinal, lateral and vertical deformation, the deformation and displacement requirements of the beam body in multiple directions are met through the cooperation of the fixed tooth plate, the floating tooth plate, the longitudinal support system and the transverse support system, and the fixed tooth plate and the floating tooth plate are always in a meshing state during the adjustment process, thereby forming a continuous vehicle passing surface to ensure the safety and comfort of vehicle traffic. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 A schematic diagram of a partial cross-section structure of the present invention from another viewing angle;

[0023] Figure 3 It is a partial cross-sectional structural diagram of the cooperation between the fixed tooth plate and the floating tooth plate of the present invention;

[0024] Figure 4 It is a structural schematic diagram of a partial cross-section of the longitudinal support system of the present invention;

[0025] Figure 5 It is a partial cross-sectional structural schematic diagram of the cooperation between the longitudinal beam and the transverse support system of the present invention;

[0026] Figure 6 It is a partial cross-sectional structural schematic diagram of the cooperation between the floating tooth plate and the transverse support system of the present invention;

[0027] Figure 7 For the present invention Figure 6 Schematic diagram of the local enlarged structure at point A in the middle.

[0028] In the figure: 1, beam body; 2, fixed tooth plate; 3, floating tooth plate; 4, pulley; 5, drainage trough; 6, cast-in-place concrete; 101, support box; 102, clamping support 1; 103, sliding support 1; 104, longitudinal beam; 105, limit seat; 201, cross beam; 202, clamping support 2; 203, sliding support 2; 204, rotating support; 205, clamping support 3; 206, cover plate; 207, pin shaft; 208, limit pin; 209, connecting plate. DETAILED DESCRIPTION

[0029] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 7 As shown, this embodiment proposes a floating bridge expansion device, which is arranged between two beams 1, including a fixed tooth plate 2, a floating tooth plate 3, a transverse support system and a longitudinal support system. The tops of the two beams 1 are provided with L-shaped installation grooves, each of which is provided with embedded steel bars and a plurality of fixed tooth plates 2. The embedded steel bars are fixedly connected to the beam 1, and each fixed tooth plate 2 is fixedly connected to the embedded steel bars. During on-site construction, the fixed tooth plate 2 is connected to the embedded steel bars by anchor bolts, and then connected to the beam 1 as a whole by pouring cast-in-place concrete 6. At the same time, it is ensured that the top of the fixed tooth plate 2 is flush with the road surface to ensure smooth vehicle passage. A meshing groove 1 is provided in the middle of each fixed tooth plate 2, and a plurality of floating tooth plates 3 are overlapped at the top of each installation groove. The middle of each floating tooth plate 3 Two meshing grooves are provided on each of the two beam bodies 1, and each floating tooth plate 3 is staggered with the corresponding fixed tooth plate 2. A slide groove is provided on each fixed tooth plate 2. A pulley 4 is installed at the bottom end of each floating tooth plate 3, and each pulley 4 is slidably matched with the corresponding slide groove. Multiple groups of transverse support systems are provided between the two beam bodies 1, and the transverse support system is used to support multiple floating tooth plates 3. Multiple groups of longitudinal support systems are installed between the two beam bodies 1, and the longitudinal support system is used to support the transverse support system. A drainage ditch 5 is provided at the bottom of the multiple longitudinal support systems. The drainage ditch 5 is installed between the two beam bodies 1 to collect road surface water and discharge it in a centralized manner to prevent rainwater from seeping into the side of the beam body 1. In this embodiment, the drainage ditch 5 is made of a polymer material with elastic deformation ability, which can adapt to the telescopic deformation of the two beam bodies.

[0031] like Figure 1 , Figure 2 and Figure 4As shown, the longitudinal support system includes a support box 101, a compression support 102, a sliding support 103 and a longitudinal beam 104. A plurality of support boxes 101 are arranged in each installation groove, and each support box 101 is fixedly connected to the embedded steel bars in the installation groove. During on-site construction, the support box 101 and the embedded steel bars are connected together by anchor bolts, and then connected to the two beam bodies 1 by pouring cast-in-place concrete 6 to form a whole. A cavity is opened inside each support box 101 to leave a sliding space for the longitudinal beam 104, and the top and bottom of each cavity are respectively fixedly installed with A clamping support 102 and a sliding support 103. In this embodiment, multiple sliding supports 103 and a clamping support 102 are made of resin materials with elastic deformation ability. The support box 101 can move slightly in the vertical direction relative to the longitudinal beam 104. A longitudinal beam 104 is arranged between every two opposing support boxes 101. Each longitudinal beam 104 is slidably matched with the corresponding clamping support 102 and sliding support 103. A limiting block is installed on the inner wall of each support box 101 to prevent the longitudinal beam 104 from sliding out of the support box 101.

[0032] like Figures 5 to 7As shown, the transverse support system includes a crossbeam 201, a second pressing support 202, a second sliding support 203, a rotating support 204, a third pressing support 205, a cover plate 206 and a pin 207. A plurality of crossbeams 201 are arranged between the two beam bodies 1. Each crossbeam 201 at least straddles two sets of longitudinal support systems. In this embodiment, each crossbeam 201 straddles two sets of longitudinal support systems. Connecting plates 209 are installed at both ends of each crossbeam 201. The plurality of crossbeams 201 can be connected by connecting plates 209 and bolts. The cross beam 201 is connected as a whole, and two through holes are provided on each cross beam 201. The top and bottom ends of each through hole are fixedly installed with a second pressing support 202 and a second sliding support 203. Each longitudinal beam 104 passes through the corresponding through hole and slides with the second pressing support 202 and the second sliding support 203. A plurality of limit pins 208 are installed on the inner side wall of each through hole. A limit seat 105 is installed on both sides of each longitudinal beam 104. The limit seat 105 is stuck between the corresponding plurality of limit pins 208 to limit the longitudinal beam 104. The beam 104 and the cross beam 201 move relative to each other in the longitudinal direction. A plurality of grooves are provided at the top of each cross beam 201. A rotating support 204 is installed on each groove. A supporting groove is provided at the top of each floating tooth plate 3. A pressing support 205 is provided in each supporting groove. A cover plate 206 is fixedly installed at the top of each cross beam 201. A plurality of pins 207 are rotatably connected to each cross beam 201. Each pin 207 penetrates the corresponding rotating support 204, the floating tooth plate 3 and the pressing support. The three 205 extend into the cover plate 206, and a gap is set between one end of each floating tooth plate 3 and the inner wall of the groove of the beam 201. The floating tooth plate 3 avoids interference with the beam 201 when rotating horizontally. The multiple rotating supports 204 and the clamping supports 205 are all made of materials with deformation ability. In this embodiment, the multiple rotating supports 204 and the clamping supports 205 are all made of polymer materials with elastic deformation ability. The floating tooth plate 3 can move slightly relative to the beam 201 in the vertical direction.

[0033] In this embodiment, the floating bridge expansion device is arranged at the beam joint position reserved between the two beam bodies 1, the fixed tooth plate 2 is fixedly installed on the mounting groove at the top of the two beam bodies 1, one end of the floating tooth plate 3 is overlapped on the top of the beam body 1 and meshed with the fixed tooth plate 2, and the other end of the floating tooth plate 3 is rotatably connected to the transverse support system. The longitudinal support system is installed between the two beam bodies 1 for supporting the transverse support system.

[0034] When the beam body 1 undergoes longitudinal deformation, the beam body 1 on this side drives the fixed tooth plate 2 and the support box 101 to move longitudinally, wherein the fixed tooth plate 2 on this side moves toward the floating tooth plate 3, and the support box 101 slides toward the longitudinal beam 104, thereby satisfying the longitudinal expansion and contraction deformation requirements of the beam body 1. If the deformation of the beam body 1 is large, when the edge position of the slide groove on the fixed tooth plate 2 contacts the pulley 4 on the floating tooth plate 3, the fixed tooth plate 2 on this side drives the floating tooth plate 3 and the crossbeam 201 to move, and the crossbeam 201 can drive the floating tooth plate 3 on the other side to move toward the fixed tooth plate 2 on the other side.

[0035] When the beam body 1 undergoes lateral deformation, the side beam body 1 drives the fixed tooth plate 2 and the support box 101 to move laterally, wherein the fixed tooth plate 2 on this side drives the floating tooth plate 3 to move laterally, the support box 101 slides laterally relative to the longitudinal beam 104, and the floating tooth plate 3 on this side rotates slightly in the horizontal direction relative to the lateral support system, thereby meeting the lateral deformation requirements of the beam body 1.

[0036] When the beam body 1 undergoes vertical deformation, the side beam body 1 drives the fixed tooth plate 2, the floating tooth plate 3 and the support box 101 to move in the vertical direction. Since the rotating support, the clamping support three, the sliding support one and the clamping support one are all made of materials with elastic deformation ability, the floating tooth plate 3 on this side moves slightly in the vertical direction relative to the transverse support system, and the support box 101 moves slightly in the vertical direction relative to the longitudinal beam 104, thereby meeting the vertical deformation requirements of the beam body 1.

[0037] In this embodiment, when the beam body 1 undergoes longitudinal, transverse and vertical deformation, the bridge expansion device performs corresponding longitudinal, transverse and vertical adjustments through the cooperation of the fixed tooth plate 2, the floating tooth plate 3, the longitudinal support system and the transverse support system, thereby meeting the deformation and displacement requirements of the beam body 1 in multiple directions, and during the adjustment process, the fixed tooth plate 2 and the floating tooth plate 3 are always in a meshing state, thereby forming a continuous vehicle passing surface, ensuring the safety and comfort of vehicle passage.

[0038] It should be noted that, in the present embodiment, a set of transverse support systems is arranged on the longitudinal beam 4 in a direction parallel to the axis of the bridge, and two sets of floating tooth plates 3 are arranged between the two beam bodies 1. According to actual engineering needs, in the present invention, two or more sets of transverse support systems can be arranged on the longitudinal beam 4, and correspondingly, three or more sets of floating tooth plates 3 are arranged between the two beam bodies 1 to form a multi-module floating bridge telescopic device.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A floating bridge expansion device, arranged between two beams (1), characterized in that: include: A fixed tooth plate (2), the top ends of the two beam bodies (1) are provided with a mounting groove, a plurality of the fixed tooth plates (2) are fixedly mounted in each mounting groove, and a meshing groove 1 is provided in the middle of each fixed tooth plate (2); Floating tooth plates (3), the top of each installation groove is overlapped with a plurality of floating tooth plates (3), the middle of each floating tooth plate (3) is provided with a second meshing groove, and each floating tooth plate (3) is staggered with the corresponding fixed tooth plate (2); A transverse support system, wherein a plurality of groups of the transverse support systems are arranged between the two beam bodies (1), and the transverse support systems are used to support a plurality of the floating tooth plates (3); A longitudinal support system, wherein a plurality of groups of the longitudinal support systems are installed between the two beam bodies (1), and the longitudinal support systems are used to support the transverse support systems.

2. A floating bridge expansion device according to claim 1, characterized in that: The longitudinal support system comprises: A support box (101), wherein a plurality of the support boxes (101) are fixedly installed in each of the installation slots, and each of the support boxes (101) has a cavity formed inside; A pressing support (102) and a sliding support (103), wherein the top and bottom ends of each cavity are respectively fixedly mounted with the pressing support (102) and the sliding support (103); A longitudinal beam (104) is provided between each two opposite support boxes (101), and each longitudinal beam (104) is slidably matched with the corresponding clamping support one (102) and the sliding support one (103).

3. The floating bridge expansion device according to claim 2, characterized in that: The lateral support system comprises: A crossbeam (201), wherein a plurality of the crossbeams (201) are arranged between the two beam bodies (1), and each of the crossbeams (201) is provided with a plurality of through holes; A clamping support 2 (202) and a sliding support 2 (203), the top and bottom ends of each of the through holes are fixedly mounted with the clamping support 2 (202) and the sliding support 2 (203), and each of the longitudinal beams (104) passes through the corresponding through hole and is slidably matched with the clamping support 2 (202) and the sliding support 2 (203); A rotating support (204), wherein a plurality of grooves are formed at the top of each of the cross beams (201), and the rotating support (204) is installed on each of the grooves; A clamping support three (205), wherein a support groove is provided at the top end of each floating tooth plate (3), and a clamping support three (205) is provided in each support groove; A cover plate (206), the cover plate (206) being fixedly mounted on the top end of each of the cross beams (201); A plurality of pin shafts (207) are rotatably connected to each of the cross beams (201), and each of the pin shafts (207) passes through the corresponding rotating support (204), the floating tooth plate (3) and the clamping support three (205) and extends into the cover plate (206).

4. The floating bridge expansion device according to claim 3, characterized in that: Each of the fixed tooth plates (2) is provided with a slide groove, and a pulley (4) is installed at the bottom end of each of the floating tooth plates (3), and each of the pulleys (4) is slidably matched with the corresponding slide groove.

5. The floating bridge expansion device according to claim 4, characterized in that: A drainage trough (5) is provided at the bottom of the plurality of longitudinal support systems, and the drainage trough (5) is installed between two of the beam bodies (1).

6. The floating bridge expansion device according to claim 5, characterized in that: The plurality of rotating supports (204), the clamping support three (205), the sliding support one (103) and the clamping support one (102) are all made of a material having deformation capability.

7. The floating bridge expansion device according to claim 6, characterized in that: A plurality of limit pins (208) are installed on the inner side wall of each through hole, and a limit seat (105) is installed on both sides of each longitudinal beam (104), and the limit seat (105) is clamped between the corresponding plurality of limit pins (208).

8. The floating bridge expansion device according to claim 7, characterized in that: Both ends of each crossbeam (201) are provided with connecting plates (209).

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