Noise reduction expansion joint

Abstract

The utility model relates to the technical field of bridges, in particular to a noise reduction expansion joint which comprises first profile steel and second profile steel, a noise reduction mechanism is arranged on the outer wall of the first profile steel, the noise reduction mechanism comprises a first fixing screw and a connecting piece, and the end of the first fixing screw is in threaded connection with the first profile steel. The outer wall of the connecting piece is attached to the first profile steel, the outer wall of the first fixing screw is fixedly connected with the connecting piece, the inner wall of the connecting piece is in threaded connection with the second fixing screw, and the outer wall of the second fixing screw is fixedly connected with the rubber sleeve. A second fixing screw penetrates through a connecting piece and a rubber sleeve, so that the connecting piece and the rubber sleeve are fixed, the rubber sleeve wraps the first profile steel, and when vibration is transmitted to the first profile steel, the contact area of a rubber protruding block in the rubber sleeve and the first profile steel is reduced, and the transmission speed is reduced; and the rubber convex blocks stretch out and draw back, so that the noise reduction effect is more obvious, and the bridge is more quiet when vehicles run on the bridge.

Description

Technical Field

[0001] The utility model relates to the technical field of bridges, in particular to a noise reduction expansion joint. Background Art

[0002] A bridge expansion joint refers to an expansion joint usually arranged between two beam ends, between a beam end and an abutment, or at the hinged position of a bridge to meet the requirements of bridge deck deformation.

[0003] For example, a new type of expansion joint with the authorization announcement number of "CN209923763U" solves the problems of the existing new type of expansion joint, such as easy water accumulation in the steel, corrosion of the expansion joint, and short service life of the expansion joint. By solving the problem of water accumulation in the cavity of the bridge expansion joint, the service life of the expansion joint is extended, and the replacement cost can be greatly saved. Considering the existing new type of expansion joint, after the single rubber strip absorbs the vibration amplitude, the inner wall of the rubber strip still has a large contact area with the profiled steel, and the vibration source will still be transmitted greatly, resulting in insignificant noise reduction. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem that in the existing new type of expansion joint, the inner wall of the rubber strip still has a large contact area with the profiled steel, and the vibration source will still be transmitted greatly, resulting in insignificant noise reduction, and to propose a noise reduction expansion joint.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a noise reduction expansion joint, including a first profiled steel and a second profiled steel. A noise reduction mechanism is arranged on the outer wall of the first profiled steel. The noise reduction mechanism includes a first fixing screw and a connecting piece. The end of the first fixing screw is threadedly connected to the first profiled steel. The outer wall of the connecting piece is attached to the first profiled steel. The outer wall of the first fixing screw is fixedly connected to the connecting piece. The inner wall of the connecting piece is threadedly connected to a second fixing screw. The outer wall of the second fixing screw is fixedly connected to a rubber sleeve. The outer wall of the rubber sleeve is fixedly connected to a rubber convex block.

[0006] Preferably, a connecting mechanism is arranged on the inner wall of the first profiled steel. The connecting mechanism includes a first connecting strip. The outer wall of the first connecting strip is slidably connected to the first profiled steel. The outer wall of the first connecting strip is fixedly connected to a connecting plate. The outer wall of the connecting plate is fixedly connected to a second connecting strip.

[0007] Preferably, a connecting groove is installed on the inner wall of the second profiled steel. The inner wall of the connecting groove is slidably connected to the second connecting strip.

[0008] Preferably, a threaded hole is installed on the inner wall of the first profiled steel. The inner wall of the threaded hole is threadedly connected to a steel reinforcement cage.

[0009] Preferably, a square groove is installed on the inner wall of the first steel section, and the inner wall of the square groove is in tight contact with a square rubber strip.

[0010] Preferably, the inner wall of the rubber sleeve is fixedly connected to the square rubber strip.

[0011] The noise reduction expansion joint proposed by the present utility model has the beneficial effect that: by passing the second fixing screw through the connecting piece and the rubber sleeve, the connecting piece and the rubber sleeve are fixed. The rubber sleeve wraps around the outside of the first steel section. When vibration is transmitted to the first steel section, the contact area between the rubber bump inside the rubber sleeve and the first steel section is reduced to slow down the transmission speed, and the expansion and contraction of the rubber bump will also increase the noise reduction effect more significantly, making the bridge quieter when vehicles are driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the present utility model;

[0013] Figure 2 is Figure 1 the upward view sectional structural diagram in

[0014] Figure 3 is Figure 1 the side view sectional structural diagram in

[0015] Figure 4 is Figure 3 the enlarged structural diagram at A in

[0016] Figure 5 is Figure 3 the enlarged structural diagram at B in

[0017] Figure 6 is Figure 3 the enlarged structural diagram at B in

[0018] In the figure: 1, the first steel section; 2, the second steel section; 3, the noise reduction mechanism; 301, the first fixing screw; 302, the connecting piece; 303, the second fixing screw; 304, the rubber sleeve; 305, the rubber bump; 4, the connecting mechanism; 401, the first connecting strip; 402, the connecting plate; 403, the second connecting strip; 5, the connecting groove; 6, the threaded hole; 7, the steel reinforcement cage; 8, the square groove; 9, the square rubber strip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-6, the present utility model provides a technical solution: a noise reduction expansion joint, which includes a first section steel 1 and a second section steel 2. A noise reduction mechanism 3 is provided on the outer wall of the first section steel 1. Through the gap between the rubber bump 305 inside the rubber sleeve 304 and the first section steel 1, the contact area between the rubber sleeve 304 and the first section steel 1 is reduced, so that the expansion and contraction of the rubber bump can also increase the noise reduction effect. The noise reduction mechanism 3 includes a first fixing screw 301 and a connecting piece 302. The end of the first fixing screw 301 is threadedly connected to the first section steel 1. The outer wall of the connecting piece 302 is attached to the first section steel 1. The outer wall of the first fixing screw 301 is fixedly connected to the connecting piece 302. The inner wall of the connecting piece 302 is threadedly screwed with a second fixing screw 303. The outer wall of the second fixing screw 303 is fixedly connected to the rubber sleeve 304. The outer wall of the rubber sleeve 304 is fixedly connected to the rubber bump 305;

[0021] Pass the second fixing screw 303 through the connecting piece 302 and the rubber sleeve 304 to fix the connecting piece 302 and the rubber sleeve 304. The rubber sleeve 304 is wrapped around the outside of the first section steel 1. When vibration is transmitted to the first section steel 1, the contact area between the rubber bump 305 inside the rubber sleeve 304 and the first section steel 1 is reduced to slow down the transmission speed, and the expansion and contraction of the rubber bump 305 can also increase the noise reduction effect more significantly, making the bridge quieter when vehicles are driving.

[0022] Please refer to Figure 1 、 Figure 2 and Figure 4 , a connecting mechanism 4 is provided on the inner wall of the first section steel 1. By sliding the first connecting strip 401 on the connecting plate 402 into the inside of the first section steel 1, the connection between the connecting plate 402 and the first section steel 1 is realized. The connecting mechanism 4 includes a first connecting strip 401. The outer wall of the first connecting strip 401 is slidably connected to the first section steel 1. The outer wall of the first connecting strip 401 is fixedly connected to the connecting plate 402. The outer wall of the connecting plate 402 is fixedly connected to the second connecting strip 403.

[0023] Please refer to Figure 1 and Figure 2 , a connecting groove 5 is installed on the inner wall of the second section steel 2. The inner wall of the connecting groove 5 is slidably connected to the second connecting strip 403. A threaded hole 6 is installed on the inner wall of the first section steel 1. The inner wall of the threaded hole 6 is threadedly connected to the steel reinforcement cage 7.

[0024] Please refer to Figure 1 and Figure 2 , a square groove 8 is installed on the inner wall of the first section steel 1. The inner wall of the square groove 8 abuts against the square rubber strip 9. The inner wall of the rubber sleeve 304 is fixedly connected to the square rubber strip 9.

[0025] Working principle:

[0026] Assembly stage

[0027] By inserting the end of the rubber sleeve 304 into the interior of the connecting member 302 and passing the second fixing screw 303 through the connecting member 302 and the rubber sleeve 304, the connecting member 302 and the rubber sleeve 304 are fixed. The rubber sleeve 304 is wrapped around the outside of the first profiled steel 1. At the same time, the first fixing screw 301 is taken and passed through the connecting member 302 and the first profiled steel 1 to fix the connecting member 302 and the first profiled steel 1. And the square rubber strip 9 inside the rubber sleeve 304 will enter the square groove 8 on the first profiled steel 1. Finally, the reinforcement cage 7 is screwed into the threaded hole 6 inside the first profiled steel 1 one by one to fix the reinforcement cage 7 and the first profiled steel 1. Similarly, the second profiled steel 2 is fixed in the same way.

[0028] Usage stage

[0029] According to the size of the expansion joint required, the first connecting strip 401 and the second connecting strip 403 on the connecting plate 402 are slid into the connecting groove 5 inside the first profiled steel 1 to control the gap between the first profiled steel 1 and the second profiled steel 2. Finally, the reinforcement cage 7 and the cement are poured.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A noise reduction expansion joint, comprising a first section steel (1) and a second section steel (2), characterized in that: A noise reduction mechanism (3) is provided on the outer wall of the first section steel (1). The noise reduction mechanism (3) includes a first fixing screw (301) and a connecting member (302). The end of the first fixing screw (301) is threadedly connected to the first section steel (1). The outer wall of the connecting member (302) is in contact with the first section steel (1). The outer wall of the first fixing screw (301) is fixedly connected to the connecting member (302). The inner wall of the connecting member (302) is threadedly screwed with a second fixing screw (303). The outer wall of the second fixing screw (303) is fixedly connected to a rubber sleeve (304). The outer wall of the rubber sleeve (304) is fixedly connected to a rubber bump (305).

2. The noise-reducing expansion joint according to claim 1, characterized in that: A connecting mechanism (4) is provided on the inner wall of the first section steel (1). The connecting mechanism (4) includes a first connecting bar (401). The outer wall of the first connecting bar (401) is slidably connected to the first section steel (1). The outer wall of the first connecting bar (401) is fixedly connected to a connecting plate (402). The outer wall of the connecting plate (402) is fixedly connected to a second connecting bar (403).

3. The noise-reducing expansion joint according to claim 1, characterized in that: A connecting groove (5) is installed on the inner wall of the second section steel (2). The inner wall of the connecting groove (5) is slidably connected to the second connecting bar (403).

4. A noise-reducing expansion joint according to claim 1, characterized in that: A threaded hole (6) is installed on the inner wall of the first section steel (1). The inner wall of the threaded hole (6) is threadedly connected to a steel reinforcement cage (7).

5. The noise-reducing expansion joint according to claim 1, wherein: A square groove (8) is installed on the inner wall of the first section steel (1). The inner wall of the square groove (8) is in tight contact with a square rubber strip (9).

6. The noise-reducing expansion joint according to claim 1, wherein: The inner wall of the rubber sleeve (304) is fixedly connected to the square rubber strip (9).

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