Novel expansion joint structure of bridge

Abstract

The utility model discloses a novel expansion joint structure of a bridge, which comprises two comb plates oppositely arranged at the lap joint part of the bridge, and comb teeth of the two comb plates are meshed in a staggered manner; a drainage groove with a U-shaped section is formed below the comb tooth meshing portion of the two comb tooth plates, a plurality of connecting rods perpendicular to the side wall of the drainage groove are evenly and fixedly arranged on the two sides of the outer portion of the drainage groove at intervals, and a vertical plate perpendicular to the comb tooth plate is fixedly arranged in the middle of the bottom of each comb tooth plate. Through holes in sliding fit with the connecting rods are formed in the positions, corresponding to the connecting rods, of the vertical plates respectively, springs are arranged at the positions, located between the outer side wall of the drainage groove and the vertical plates, of the connecting rods respectively in a sleeving mode, and limiting heads are fixedly arranged at the free ends of the connecting rods respectively. The drainage groove is formed between the two comb plates of the bridge expansion joint, rainwater leaked from the butt joint portion of the expansion joint is received and drained to the two ends, and the rainwater is prevented from accumulating and permeating at the bottom of the expansion joint.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, and in particular to a novel bridge expansion joint structure. Background Technology

[0002] Bridge expansion joints are joints installed between the ends of two beams, between a beam end and an abutment, or at the lap joints of a bridge to accommodate bridge deck deformation. The function of bridge expansion joints is to regulate the displacement and connection between the superstructure caused by vehicle loads and bridge construction materials. Currently, expansion joints lack adequate drainage facilities at their joints, making it easy for rainwater to leak from the joint gaps and accumulate and seep into the bottom of the joint. Therefore, some expansion joints currently have deformable drainage board structures installed underneath, such as the bridge expansion joint with a drainage structure disclosed in CN202323612763.5, where a drainage board is installed at the bottom between the wide and short expansion joint plates to collect rainwater. However, after long-term use, this drainage board structure is prone to accumulating external mud and dirt inside, affecting normal drainage performance and potentially causing blockage at the joint. Therefore, a new type of bridge expansion joint structure is being developed. Utility Model Content

[0003] The purpose of this utility model is to provide a new type of bridge expansion joint structure to solve the technical problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model discloses a novel bridge expansion joint structure, comprising two comb-tooth plates disposed opposite to each other at the bridge's overlapping section, with the comb teeth of the two comb-tooth plates interlocking; a U-shaped drainage trough is disposed below the interlocking portion of the comb teeth of the two comb-tooth plates; multiple connecting rods perpendicular to the side walls of the drainage trough are fixedly disposed at even intervals on both sides of the outer side of the drainage trough; a vertical plate perpendicular to the bottom center of each comb-tooth plate is fixedly disposed; each vertical plate has a through hole corresponding to the position of each connecting rod, which slides with the connecting rod; a spring is sleeved on each connecting rod at the position between the outer side wall of the drainage trough and the vertical plate; a limit head is fixedly disposed at the free end of each connecting rod; a scraper and a drive mechanism for driving the linear movement of the scraper are slidably disposed inside the drainage trough.

[0006] Furthermore, the driving mechanism includes a screw rotatably mounted on the top of the drainage trough and a handwheel for driving the screw to rotate. A nut sleeve threadedly connected to the screw is fitted onto the screw, and the top of the scraper is fixedly connected to the nut sleeve.

[0007] Furthermore, a transmission box is fixedly installed at one end of the upper part of the drainage trough, and the screw is rotatably installed inside the transmission box, with one end extending to the outside of the transmission box and the handwheel installed at the end; a sliding groove is opened on the side of the transmission box, and a slider is slidably installed in the sliding groove. One end of the slider is fixedly connected to the outer wall of the nut sleeve, and the other end of the slider is fixedly connected to the upper part of the scraper.

[0008] Furthermore, retractable accordion-style protective covers are respectively provided between the two end walls of the slide and the slider.

[0009] Furthermore, two mounting plates are symmetrically fixedly installed at the other end of the upper part of the drainage trough, and a sliding rod is fixedly installed between the two mounting plates. A matching sliding sleeve is fitted on the sliding rod, and a connecting rod is fixedly installed between the slider and the sliding sleeve. The upper part of the scraper is fixedly connected to the connecting rod.

[0010] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0011] This invention incorporates a drainage channel between two comb-tooth plates in a bridge expansion joint. This channel collects rainwater leaking from the joint and discharges it to both ends, preventing rainwater from accumulating and seeping at the bottom of the expansion joint. Furthermore, the drainage channel is flexibly connected to the vertical plates at the bottom of the two comb-tooth plates, thus buffering the rigid compression or tension experienced by the drainage channel when the positions of the two comb-tooth plates expand or contract, thereby ensuring the stability of the drainage channel structure.

[0012] This invention allows the screw to rotate by rotating the handwheel. During the rotation of the screw, the nut sleeve drives the scraper to move in a straight line. The scraper can scrape away the mud, sand and dirt accumulated inside the drainage trough, thereby ensuring the normal drainage performance of the drainage trough. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a top-view structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the end view structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the drainage trough;

[0017] Explanation of reference numerals in the attached drawings: 1. Comb plate; 2. Drainage groove; 3. Connecting rod; 4. Vertical plate; 5. Spring; 6. Limiting head; 7. Scraper; 8. Screw; 9. Handwheel; 10. Transmission box; 11. Nut sleeve; 12. Slide groove; 13. Slider; 14. Bellows-style protective cover; 15. Mounting plate; 16. Slide rod; 17. Slide sleeve; 18. Connecting rod. Detailed Implementation

[0018] like Figures 1-3 As shown, a novel bridge expansion joint structure includes two comb-tooth plates 1 installed opposite each other at the bridge's overlapping section, with the comb teeth of the two comb-tooth plates 1 interlocking. The main structure and installation method of this utility model are the same as those of existing comb-shaped expansion joint structures, and will not be described in detail here.

[0019] A U-shaped drainage trough 2 is movably installed below the meshing portion of the two comb plates 1. Multiple connecting rods 3, perpendicular to their sidewalls, are fixedly and evenly spaced on both sides of the drainage trough 2. A vertical plate 4, perpendicular to the bottom center of each comb plate 1, is fixedly installed. Each vertical plate 4 has a through hole corresponding to each connecting rod 3, allowing for sliding engagement. A spring 5 is fitted onto each connecting rod 3 at the portion between the outer wall of the drainage trough 2 and the vertical plate 4. A limiting head 6 is fixedly installed at the free end of each connecting rod 3, with the outer diameter of the limiting head 6 being larger than the inner diameter of the through hole on the vertical plate. This invention, through the above structure, flexibly connects the drainage trough to the vertical plates at the bottom of the two comb plates, thereby buffering the rigid compression or tension experienced by the drainage trough when the positions of the two comb plates expand and contract, thus ensuring the stability of the drainage trough structure.

[0020] The drainage trough 2 is equipped with a scraper 7 and a drive mechanism for driving the scraper 7 to move linearly.

[0021] In this embodiment, the driving mechanism includes a screw 8 rotatably mounted on the top of the drainage trough 2 and a handwheel 9 for driving the screw 8 to rotate. Specifically, a transmission box 10 is fixedly installed at one end of the upper part of the drainage trough 2 along its entire length. The main body of the screw 8 is rotatably mounted inside the transmission box 10, with one end extending to the outside of the transmission box 10 and the handwheel 9 installed at its end. A nut sleeve 11 threadedly connected to the screw 9 is fitted onto it, and the top of the scraper 7 is fixedly connected to the nut sleeve 11. A sliding groove 12 is provided on the side of the transmission box 11, and a slider 13 is slidably arranged in the sliding groove 12. One end of the slider 13 is fixedly connected to the outer wall of the nut sleeve 11, and the other end of the slider 13 is fixedly connected to the upper part of the scraper 7. In addition, retractable bellows-style protective covers 14 are respectively connected between the two end walls of the sliding groove 12 and the slider 13. In this embodiment, the transmission box and the bellows-style protective cover can effectively protect the screw and the screw sleeve, preventing them from being eroded by rainwater and mud, and ensuring the stability of the transmission structure.

[0022] This utility model features a sliding scraper structure inside the drainage trough, allowing workers to periodically maintain and clean the drainage trough by regularly expanding and contracting the joints: by rotating the handwheel, the screw rotates, and during the rotation of the screw, the nut sleeve drives the scraper to move in a straight line. The scraper can scrape away the mud, sand, and dirt accumulated inside the drainage trough, thereby ensuring the normal drainage performance of the drainage trough.

[0023] As a further improvement to this utility model, two mounting plates 15 are symmetrically fixedly arranged at the other end of the upper part of the drainage trough 2. A sliding rod 16 is fixedly arranged between the two mounting plates 15, and a matching sliding sleeve 17 is sleeved on the sliding rod 16. A connecting rod 18 is fixedly arranged between the slider 13 and the sliding sleeve 17, and the upper part of the scraper 7 is fixedly connected to the connecting rod 18. The sliding cooperation between the sliding rod and the sliding sleeve ensures the stability of the scraper when sliding in a straight line.

[0024] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A novel bridge expansion joint structure, characterized in that: The system includes two comb plates positioned opposite each other at the bridge's overlapping section, with their teeth interlocking. Below the interlocking portion of the comb plates, a U-shaped drainage trough is provided. Multiple connecting rods perpendicular to the sidewalls of the drainage trough are fixedly and evenly spaced on both sides of the outer surface. A vertical plate perpendicular to the bottom center of each comb plate is fixedly provided. Each vertical plate has a through hole corresponding to a connecting rod, allowing for sliding engagement. A spring is fitted onto each connecting rod at the portion between the outer wall of the drainage trough and the vertical plate. A limit head is fixedly provided at the free end of each connecting rod. A scraper and a drive mechanism for driving the scraper's linear motion are slidably arranged inside the drainage trough.

2. The novel bridge expansion joint structure according to claim 1, characterized in that: The driving mechanism includes a screw rotatably mounted on the top of the drainage trough and a handwheel for driving the screw to rotate. A nut sleeve threadedly connected to the screw is fitted onto the screw, and the top of the scraper is fixedly connected to the nut sleeve.

3. The novel bridge expansion joint structure according to claim 2, characterized in that: A transmission box is fixedly installed at one end of the upper part of the drainage trough. The screw is rotatably installed inside the transmission box, with one end extending to the outside of the transmission box and the handwheel installed at the end. A sliding groove is opened on the side of the transmission box, and a slider is slidably installed in the sliding groove. One end of the slider is fixedly connected to the outer wall of the nut sleeve, and the other end of the slider is fixedly connected to the upper part of the scraper.

4. The novel bridge expansion joint structure according to claim 3, characterized in that: Retractable accordion-style protective covers are respectively provided between the two end walls of the slide and the slider.

5. The novel bridge expansion joint structure according to claim 3, characterized in that: Two mounting plates are symmetrically fixed at the other end of the upper part of the drainage channel. A sliding rod is fixed between the two mounting plates. A matching sliding sleeve is fitted on the sliding rod. A connecting rod is fixed between the slider and the sliding sleeve. The upper part of the scraper is fixedly connected to the connecting rod.

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