Pile casing noise reduction device for underwater piling in ecological sensitive area

Abstract

The invention provides a pile casing noise reduction device for underwater piling in an ecological sensitive area. The pile casing noise reduction device comprises a double-layer pile casing, a rubber hose, a sound absorbing material and an external air compressor. The rubber hose is spirally coiled on the inner wall of the double-layer pile casing, and the rubber hose is spirally arranged in the axial direction of the double-layer pile casing; the double-layer pile casing comprises an inner-layer pile casing and an outer-layer pile casing, and a gap between the inner-layer pile casing and the outer-layer pile casing is filled with a sound absorbing material; the rubber hose comprises a connecting end, the connecting end extends out of the double-layer pile casing and is connected with the external air compressor, and the rubber hose coiled in the double-layer pile casing is provided with air holes; the external air compressor conveys air to the rubber hose through the connecting end, then the rubber hose generates a bubble curtain through the air holes, and the multiple noise reduction device integrating the bubble curtain and the pile casing structure is provided to solve the problems of bubble drifting, poor bubble stability and low noise reduction efficiency in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of reducing noise in ocean engineering, and particularly to a casing noise reduction device for underwater pile driving in ecologically sensitive areas. Background Art

[0002] With the increasing number of ocean engineering projects, reducing underwater noise is a very meaningful task. Currently, there are mainly methods such as cofferdams, casings, and bubble curtains. The cofferdam method is to build a temporary closed enclosure structure around the underwater construction area and use overpressure technology to separate the pile from the water, which has a high cost and great construction difficulty. The casing method refers to installing a steel sleeve outside the pile body around the pile, which contains sound-absorbing materials to increase the absorption of noise and can be reused. The bubble curtain method is to utilize the scattering, reflection, and absorption of sound waves by bubbles to attenuate the noise. It is flexible to install, reusable, and economical.

[0003] Using a bubble curtain for noise reduction is a relatively economical method, but it is easily affected by water flow during use, and the bubbles drift around, weakening the noise reduction effect. The presence of a casing can avoid this situation. Therefore, the present invention proposes a multiple noise reduction device integrating a bubble curtain and a casing structure. Summary of the Invention

[0004] The purpose of the present invention is to provide a casing noise reduction device for underwater pile driving in ecologically sensitive areas to solve the problems of bubble dispersion, poor bubble stability, and low noise reduction efficiency in the prior art.

[0005] To solve the above technical problems, the present invention provides a casing noise reduction device for underwater pile driving in ecologically sensitive areas, including a double-layer casing, a rubber hose, a sound-absorbing material, and an external air compressor;

[0006] The rubber hose is spirally wound on the inner wall of the double-layer casing, and the rubber hose is spirally arranged along the axial direction of the double-layer casing;

[0007] The double-layer casing includes an inner and an outer casing, and a sound-absorbing material is filled in the gap between the inner and outer casings;

[0008] The rubber hose includes a connection end, the connection end extends out of the double-layer casing and is connected to the external air compressor, and the rubber hose wound in the double-layer casing has air holes;

[0009] The external air compressor conveys air to the rubber hose through the connection end, and then the rubber hose generates a bubble curtain through the air holes.

[0010] In a preferred embodiment, the double-layer casing is a hollow structure, and spiral grooves are axially provided on the inner wall of the double-layer casing, and the rubber hose is spirally laid in the grooves along the grooves.

[0011] In a preferred embodiment, the cross-section of the groove is a semi-circular cross-section, the diameter of the groove is the same as the diameter of the rubber hose, and the rubber hose is clamped in the groove.

[0012] In a preferred embodiment, the height of the double-layer casing is set in the range of 0.3 m - 0.5 m, and the gap distance between the inner and outer layers of the casing is set in the range of 30 mm - 50 mm.

[0013] In a preferred embodiment, the thickness range of the sound-absorbing material filled in the gap is 20 mm - 25 mm.

[0014] In a preferred embodiment, the sound-absorbing material is made of rubber and plastic cotton.

[0015] [[ID=...]] In a preferred embodiment, the connecting end of the rubber hose extends out from the top of the double-layer casing; two sharp teeth protrude downward from the bottom of the double-layer casing, and the two sharp teeth are symmetrically arranged.

[0016] In a preferred embodiment, the air holes are evenly distributed along the body of the rubber hose, and the air holes communicate the rubber hose with the internal space of the double-layer casing.

[0017] In a preferred embodiment, the diameter of the rubber hose is set in the range of 20 mm - 40 mm; the diameter of the air holes is set in the range of 2 mm - 3 mm.

[0018] In a preferred embodiment, one end of the rubber hose close to the bottom of the double-layer casing is a closed end, and an opening is provided at the connecting end of the rubber hose for connecting to an external air compressor.

[0019] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0020] 1. The present invention provides a multiple noise reduction device integrating a bubble curtain, a casing structure and a sound-absorbing material, realizing a triple synergistic effect of the stability of the bubble curtain, the noise reduction of the casing and the absorption of the sound-absorbing material. Multiple noise reduction measures are used to perform multiple noise reduction on the noise generated by underwater piling, achieving a good noise reduction effect and significantly improving the noise reduction efficiency and environmental protection performance.

[0021] 2. By combining the casing structure with the bubble curtain, the present invention can prevent the bubbles from drifting around under the action of water flow, resulting in a weakened noise reduction effect. The presence of the double-layer casing makes the bubbles gather together, avoiding their drifting around under the influence of water flow.

[0022] 3. By spirally winding the rubber hose on the inner wall of the double-layer casing, the present invention can generate air bubbles on different horizontal planes in the vertical direction, forming a dense air bubble barrier, which improves the noise reduction effect. In addition, sound-absorbing materials are arranged between the inner and outer walls of the casing, and the sound passing through the air bubble curtain is reduced in noise again. The double-layer casing itself has a noise reduction effect. It has a good noise reduction effect, can be recycled, and is relatively economical and affordable. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of the casing noise reduction device (except the air compressor) in the preferred embodiment of the present invention;

[0024] Figure 2 It is a schematic sectional view of the casing noise reduction device in the preferred embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the inner wall groove structure of the double-layer casing in the casing noise reduction device in the preferred embodiment of the present invention.

[0026] Description of the reference numerals: 1. Rubber hose; 2. Rubber and plastic cotton; 3. Double-layer casing; 4. Pile foundation; 5. Sharp teeth; 6. Air holes; 7. Grooves. Detailed Embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, terms such as "installation", "provided with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] Reference Figures 1-3 , this embodiment provides a casing noise reduction device for underwater pile driving in an ecologically sensitive area to solve the problems of bubble dispersion, poor bubble stability and low noise reduction efficiency in the prior art. Through the combination of the casing structure and the bubble curtain, it is possible to prevent the bubbles from drifting around under the action of water flow, resulting in a weakened noise reduction effect.

[0031] The overall structure of the casing noise reduction device is as Figure 1 shown, and it includes a double-layer casing 3, a rubber hose 1, a sound-absorbing material and an external air compressor; the rubber hose 1 is spirally wound on the inner wall of the double-layer casing 3, and the rubber hose 1 is spirally arranged along the axis of the double-layer casing 3; the double-layer casing 3 includes an inner and an outer casing, and a sound-absorbing material is filled in the gap between the inner and outer casings; the rubber hose 1 includes a connection end, the connection end extends out of the double-layer casing 3 and is connected to the external air compressor, and the rubber hose 1 placed in the double-layer casing 3 is provided with air holes 6; the external air compressor is located outside the overall structure, and the external air compressor conveys air to the rubber hose 1 through the connection end, and then the rubber hose 1 generates a bubble curtain through the air holes 6.

[0032] The double-layer casing 3 is a hollow structure, and a spiral groove 7 is axially provided on the inner wall of the double-layer casing 3, and the rubber hose 1 is spirally laid along the groove 7 in the groove 7. The cross-section of the groove 7 is a semi-circular cross-section (as Figure 3 shown), the diameter of the groove 7 is the same as the diameter of the rubber hose 1, and the rubber hose 1 is clamped in the groove 7. The diameter of the groove 7 is consistent with the diameter of the rubber hose 1, so that the rubber hose 1 is fixed on the inner wall of the double-layer casing 3 through the groove 7 and is spiral (as Figure 2 shown).

[0033] Lay the rubber hose 1 with air holes 6 along the spiral groove 7, and then connect it to an external air compressor to generate a dense bubble curtain. The dense bubble curtain reduces mid- and low-frequency noise through sound wave scattering and reflection. The setting of the spiral groove 7 fixes the rubber hose 1 and optimizes the bubble distribution path. The double-layer cylinder 3 physically blocks the impact of water flow, preventing dispersion caused by water flow impact and improving the bubble curtain coverage rate.

[0034] The height of the double-layer cylinder 3 is set in the range of 0.3 m - 0.5 m, and the gap distance between the inner and outer cylinders is set in the range of 30 mm - 50 mm. The thickness range of the sound-absorbing material filled in the gap is 20 mm - 25 mm. The sound-absorbing material uses rubber and plastic cotton 2. Rubber and plastic cotton 2 is filled between the inner and outer cylinders to absorb the residual sound energy passing through the bubble curtain. Rubber and plastic cotton 2 converts high-frequency sound energy into heat energy, improving the noise reduction efficiency.

[0035] The connecting end of the rubber hose 1 extends out from the top of the double-layer cylinder 3; two teeth 5 (as Figure 1 shown) protrude downward from the bottom of the double-layer cylinder 3, and the two teeth 5 are symmetrically arranged. The two teeth 5 are fixed to the bottom of the double-layer cylinder 3 by welding. The teeth 5 protruding from the bottom of the double-layer cylinder 3 can enable it to quickly and smoothly dive to the designated position.

[0036] The air holes 6 are evenly distributed along the body of the rubber hose 1, and the air holes 6 communicate the internal space of the rubber hose 1 with the double-layer cylinder 3. The diameter of the rubber hose 1 is set in the range of 20 mm - 40 mm; the diameter of the air holes 6 is set in the range of 2 mm - 3 mm. One end of the rubber hose 1 close to the bottom of the double-layer cylinder 3 is a closed end, and the connecting end of the rubber hose 1 is provided with an opening for connecting to the external air compressor.

[0037] For the casing noise reduction device for underwater pile driving in an ecologically sensitive area provided in this embodiment, the presence of the double-layer cylinder 3 makes the bubbles gather together, avoiding their dispersion in all directions affected by the water flow, and bubbles are generated on different horizontal planes in the vertical direction, forming a dense bubble barrier, improving the noise reduction effect; in addition, sound-absorbing materials are arranged between the inner and outer walls of the casing, and the sound passing through the bubble curtain is noise-reduced again; the double-layer cylinder 3 itself has a noise reduction effect. It can be seen that the casing noise reduction device performs multiple noise reductions on the noise, has a good noise reduction effect, can be recycled, and is relatively economical and affordable.

[0038] In the casing noise reduction device in this embodiment, during use, the casing noise reduction device is lifted by a cantilever crane, and the teeth 5 protruding from the bottom of the double-layer cylinder 3 are used to enable it to smoothly dive to the designated underwater position, and the double-layer cylinder 3 is used to cover the pile foundation 4 (as Figure 1As shown in the figure, before the piling project starts, first start the air compressor and deliver air until the entire rubber hose 1 is filled. Utilize the spiral distribution of the rubber hose 1 and the structure of the air holes 6 to generate bubbles in different horizontal planes in the vertical direction to form a dense bubble curtain. During the piling process, the noise generated first passes through the bubble curtain area. Due to the scattering and absorption effects of the bubbles on the sound, it is noise-reduced to a certain extent. However, there will still be some noise that penetrates the bubble curtain and continues to spread to the area of the double-layer casing 3 containing sound-absorbing materials. When the bed penetrates the inner wall of the double-layer casing 3, the inner wall will reflect part of the sound wave, reducing the energy transmitted outward and achieving noise reduction. Part of the noise penetrates the inner wall of the double-layer casing 3 and continues to spread to the sound-absorbing area composed of sound-absorbing materials, where the sound energy is converted into heat energy, playing a noise-reducing role again. The outer wall and the inner wall of the double-layer casing 3 play the same role.

[0039] Through the casing noise reduction device of this embodiment, the noise generated by piling is noise-reduced multiple times, greatly reducing the sound energy transmitted outward by the noise, and playing a positive role in protecting the marine environment and precious marine organisms.

[0040] The above is only a preferred specific embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, using this concept to make non-substantive modifications to the present invention, shall fall within the scope of infringement of the protection of the present invention.

Claims

1. A casing noise reduction device for underwater pile driving in ecologically sensitive areas, characterized in that: It includes a double-layer casing, a rubber hose, sound-absorbing material, and an external air compressor; The rubber hose is spirally wound around the inner wall of the double-layer casing, and the rubber hose is spirally arranged along the axial direction of the double-layer casing; The double-layer casing includes an inner layer and an outer layer of the casing, and sound-absorbing material is filled in the gap between the inner and outer layers of the casing; The rubber hose includes a connection end, the connection end extends out of the double-layer casing and is connected to the external air compressor, and the rubber hose wound in the double-layer casing has air holes; The external air compressor conveys air to the rubber hose through the connection end, and then the rubber hose generates a bubble curtain through the air holes.

2. The casing noise reduction device for underwater pile driving in an ecologically sensitive area according to claim 1, wherein: The double-layer casing is a hollow structure, and a spiral groove is provided along the axial direction on the inner wall of the double-layer casing, and the rubber hose is laid along the spiral of the groove in the groove.

3. The casing noise reduction device for underwater pile driving in an ecologically sensitive area according to claim 2, wherein: The cross-section of the groove is a semi-circular cross-section, the diameter of the groove is the same as the diameter of the rubber hose, and the rubber hose is clamped in the groove.

4. The casing noise reduction device for underwater pile driving in an ecologically sensitive area according to claim 1, wherein: The height setting range of the double-layer casing is 0.3m - 0.5m, and the gap distance between the inner and outer layers of the casing is set in the range of 30mm - 50mm.

5. The casing noise reduction device for underwater pile driving in an ecologically sensitive area according to claim 4, characterized in that: The thickness range of the sound-absorbing material filled in the gap is 20mm - 25mm.

6. The casing noise reduction device for underwater pile driving in an ecologically sensitive area according to claim 5, wherein: The sound-absorbing material uses rubber and plastic cotton.

7. The casing noise reduction device for underwater pile driving in an ecologically sensitive area according to claim 1, characterized in that: The connection end of the rubber hose extends out from the top of the double-layer casing; two sharp teeth protrude downward from the bottom of the double-layer casing, and the two sharp teeth are symmetrically arranged.

8. The casing noise reduction device for underwater pile driving in an ecologically sensitive area according to claim 1, wherein: The air holes are evenly distributed along the body of the rubber hose, and the air holes communicate the rubber hose with the internal space of the double-layer casing.

9. The casing noise reduction device for underwater pile driving in an ecologically sensitive area according to claim 8, characterized in that: The diameter setting range of the rubber hose is 20mm - 40mm; the diameter setting range of the air holes is 2mm - 3mm.

10. The casing noise reduction device for underwater pile driving in an ecologically sensitive area according to claim 9, characterized in that: One end of the rubber hose close to the bottom of the double-layer casing is a closed end, and the connection end of the rubber hose is provided with an opening for connecting to the external air compressor.

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