Acoustic treatment device of gantry crane in anechoic chamber for wind tunnel test

Abstract

The invention discloses an acoustic treatment device of a gantry crane in an anechoic chamber for a wind tunnel test in the technical field of anechoic treatment of the wind tunnel test, and the acoustic treatment device comprises gantry crane acoustic treatment modules which specifically comprise a supporting leg treatment module, a supporting leg cross beam treatment module, a top cross beam treatment module, a supplementary structure treatment module and an acoustic treatment unit, and targeted silencing treatment is carried out based on the characteristics of each module. Precise zoning treatment is conducted according to distribution and characteristics of noise sources of the gantry crane, core high-noise areas such as a hoisting mechanism are wrapped in a customized mode through the high windward side submodule, and efficient sound absorption materials such as glass wool filled in the high-noise areas can convert sound energy into heat energy to be dissipated; seamless coverage is carried out on a complex structure, a closed or semi-closed sound absorption cavity is formed, the reflection and absorption times of sound waves on a propagation path are increased, and a sound absorption barrier is constructed from the source and the propagation path, so that the radiation intensity of overall noise is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind tunnel test anechoic processing, in particular to an acoustic processing device of a gantry crane in an anechoic chamber for wind tunnel test. BACKGROUND

[0002] Wind tunnel test is a simulation experiment technology used in the fields of aerospace, automobiles, etc. to study the interaction between objects and air. By generating controllable airflow in an artificially constructed pipe (wind tunnel), the model is fixed in the test section to simulate the aerodynamic characteristics of the object in actual flight or driving, such as airflow speed, pressure distribution, lift and drag, etc. to optimize design and verify performance. During the test, the wind tunnel fan system drives the airflow to flow through the model, and data is collected by pressure sensors, balances, etc. to analyze the force and flow field characteristics of the model under specific wind speed and attack angle, providing key aerodynamic and noise performance data for newly developed aircraft, automobiles, buildings, etc. It is an important means of engineering design and scientific research.

[0003] During the test, the interaction between the wind tunnel fan, airflow and model will produce strong noise, which will interfere with the accurate measurement of the target noise, causing distortion of the test data. At the same time, if the walls, equipment, etc. of the room are not treated for sound absorption, the noise will be reflected multiple times to form reverberation, further masking the target signal and affecting the accuracy of the test. In addition, some tests need to be carried out in an environment with extremely low background noise to capture the weak noise characteristics of the model. Therefore, acoustic treatment eliminates background noise and reflected noise through sound absorption and sound insulation design to provide a "quiet" environment for the test, ensuring that the measurement data is true and reliable.

[0004] However, in wind tunnel tests, the gantry crane, as a large metal component, has a large surface area that will produce significant aerodynamic noise due to turbulent impact under high-speed airflow, forming a strong infrasound reflection source that seriously pollutes the acoustic environment of the anechoic chamber and interferes with the accurate measurement of the noise of the test piece itself. In addition, the gantry crane is usually located in the core area of the airflow, and its complex beam and column structure will disturb the original flow field and change the propagation path of the sound wave. If the gantry crane is not effectively anechoic, the reflected and regenerated noise it produces will become the main acoustic interference source, making it impossible to accurately obtain the acoustic characteristics of the test piece, thereby affecting the acoustic evaluation results of the entire wind tunnel test. Therefore, we propose an acoustic processing device of a gantry crane in an anechoic chamber for wind tunnel test. SUMMARY

[0005] To address the shortcomings of existing technologies, this invention provides an acoustic treatment device for a gantry crane in an anechoic chamber for wind tunnel testing. The objective of this invention is achieved as follows: An acoustic treatment device for a gantry crane in an anechoic chamber for wind tunnel testing includes a gantry crane acoustic treatment module, specifically comprising: a leg treatment module, a leg beam treatment module, a top beam treatment module, a supplementary structure treatment module, and an acoustic treatment unit. The outrigger processing modules are all divided into outrigger windward surface processing modules and outrigger other surface processing modules. The other surface processing modules include outrigger leeward surface processing sub-modules and outrigger side surface processing sub-modules. The support beam treatment module includes a support beam windward surface treatment module, a support beam top surface treatment module, and a support beam side surface treatment module. The top beam processing module includes a top beam windward surface processing module, a top beam side surface processing module, and a top beam bottom surface processing module. The supplementary structure processing module includes a staircase processing submodule and an elevator processing submodule.

[0006] Optionally, the outrigger windward surface treatment module includes supporting angle steel, glass wool, an anti-overflow layer, and a type A two-layer composite protective panel; The outrigger windward surface treatment submodule uses multiple supporting angle steels to be fixedly connected to the gantry crane outrigger steel mechanism. Glass wool is filled between each supporting angle steel. The overall structure is arc-shaped. The outside of the supporting angle steel is successively covered with an anti-overflow layer, an A-type perforated plate and a thick fiber felt. The overflow prevention layer is made of a single layer of fiber felt to prevent glass wool from escaping through the perforated plate.

[0007] Optionally, the other surface treatment module of the outrigger is based on the rectangular steel frame structure of the gantry crane outrigger to cover it, specifically by covering the leeward side and two sides of the gantry crane outrigger with the other surface treatment module; The other surface treatment modules of the outrigger are fixed by multiple supporting angle steels, and glass wool is filled between each supporting angle steel; The outer side of the supporting angle steel is sequentially covered with an anti-overflow layer, an A-type perforated plate, and a thick fiber felt; A connecting angle steel is provided between the anti-overflow layer and the A-type perforated plate.

[0008] Optionally, the support beam windward surface treatment module is arranged in an arc shape and divided into an upper sub-module of the support beam windward surface and a lower sub-module of the support beam windward surface; The upper sub-module structure of the windward surface of the outrigger beam is consistent with the structure of the windward surface treatment module of the outrigger. The lower sub-module of the outrigger beam on the windward side is set on the traveling mechanism at the lower end of the outrigger beam of the gantry crane, and includes a sealing layer; The sealing layer is made of galvanized steel sheet and is installed on the outside of the outrigger crossbeam traveling mechanism and in the gap between the traveling mechanism and the outrigger crossbeam. The sealing layer is provided with reinforcing angle steel to form a reinforcing rib structure; The outer side of the sealing layer is sequentially provided with glass wool, an anti-overflow layer and a type A two-layer composite protective panel; The Type A two-layer composite protective panel is composed of a perforated board and a thick fiber felt.

[0009] Optionally, the surfaces of the top surface treatment module and the side surface treatment module of the leg beam are both flat plate structures; The top surface treatment module and the side surface treatment module of the support beam form a C-shaped structure with the opening facing downwards. A sealing layer is provided at the opening of the C-shaped structure; The C-shaped structure is formed by supporting angle steel, with angle steel extensions on the outside of the supporting angle steel and filled with glass wool; The outer side of the supporting angle steel is successively wrapped with an anti-overflow layer, an A-type perforated plate, and a thick fiber felt; A connecting angle steel is provided between the anti-overflow layer and the A-type perforated plate.

[0010] Optionally, the top crossbeam windward surface treatment module includes a high windward surface sub-module and a low windward surface sub-module; The high windward side module is used to shield the hoisting mechanism of the gantry crane, and the low windward side module is used to shield the top crossbeam and handrail of the gantry crane.

[0011] Optionally, the high windward surface module includes supporting angle steel, connecting angle steel, glass wool, anti-overflow layer, and type A two-layer composite protective panel; The number of the high windward surface sub-modules is two sets, and they are symmetrically arranged on both sides of the lifting mechanism; The tops of the two sets of high windward surface modules are supported by connecting angle steel. The low windward surface module and the high windward surface module are configured accordingly.

[0012] Optionally, the top crossbeam side treatment module is configured correspondingly to the high windward surface sub-module; The side treatment module of the top crossbeam is flush with the height of the high windward surface module; A reinforcing angle steel is provided at the corner connection between the top beam side treatment module and the top beam, and a supporting angle steel is provided on the back of the top beam side treatment module. The bottom surface treatment module of the top crossbeam is set up in correspondence with the side surface treatment module of the top crossbeam.

[0013] Optionally, the staircase processing submodule is configured based on the hollow structure of the gantry crane staircase; The staircase treatment submodule specifically involves using a composite sound-absorbing felt structure to wrap and cover the handrails, steps, and platforms of the staircase. The composite sound-absorbing felt structure consists of an inner layer of glass wool, a middle layer of composite sound-absorbing cotton, and an outer layer of thick fiber felt. The composite sound-absorbing cotton is made of glass fiber and polyurethane mixed in a 1:1 ratio.

[0014] Optionally, the elevator handling submodule is composed of a sealing layer, glass wool, an anti-overflow layer, and a type A two-layer composite protective panel; The elevator processing submodule is C-shaped and adopts a fully shielded structure, covering the outer surface of the elevator.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: by precisely zoning the distribution and characteristics of the noise sources of the gantry crane, the core high-noise areas such as the hoisting mechanism are customized and wrapped by high windward surface sub-modules, and the internal filling with high-efficiency sound-absorbing materials such as glass wool can convert sound energy into heat energy for dissipation; the complex structures such as the top beam and stairs are seamlessly covered by corresponding side, bottom and stair treatment sub-modules to form closed or semi-closed sound-absorbing cavities, increasing the number of reflections and absorptions of sound waves on the propagation path, thus building a sound-absorbing barrier from both the source and the propagation path, thereby reducing the overall noise radiation intensity; All treatment modules consist of standardized support, connection, sound absorption, and facing components, which can be prefabricated in the factory and quickly assembled on site to complete the construction. This not only simplifies the on-site operation process, shortens the construction period, reduces labor costs and the impact on the normal operation of the gantry crane, but also ensures the uniformity of installation accuracy and noise reduction effect, while making subsequent maintenance and replacement extremely convenient. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the gantry crane provided by the present invention.

[0018] Figure 2 This is a schematic diagram of the top crossbeam structure of the gantry crane provided by the present invention.

[0019] Figure 3 This is a schematic diagram of the acoustic treatment of the windward side of the outrigger provided by the present invention.

[0020] Figure 4 This is a schematic diagram of the acoustic treatment of the leeward and side surfaces of the outriggers provided by the present invention.

[0021] Figure 5 This is a schematic diagram of the acoustic treatment of the windward side of the support beam provided by the present invention.

[0022] Figure 6 This is a schematic diagram of the acoustic treatment of the side and top surfaces of the support beam provided by the present invention.

[0023] In the diagram: 1. Gantry crane outriggers; 2. Gantry crane crossbeams; 3. Outrigger processing module; 4. Outrigger crossbeam processing module; 5. Top crossbeam processing module; 6. Staircase processing submodule; 7. Elevator processing submodule. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figures 1 to 6 The acoustic treatment device shown is for a gantry crane in a anechoic chamber for wind tunnel testing, including a gantry crane acoustic treatment module, specifically: Leg treatment module 3, leg beam treatment module 4, top beam treatment module 5, supplementary structural treatment module and acoustic treatment unit; Each of the outrigger processing modules 3 is divided into an outrigger windward surface processing module and an outrigger other surface processing module. The other surface processing module includes an outrigger leeward surface processing sub-module and an outrigger side surface processing sub-module. The support beam processing module 4 includes a support beam windward surface processing module, a support beam top surface processing module, and a support beam side surface processing module. The top beam processing module 5 includes a top beam windward surface processing module, a top beam side surface processing module, and a top beam bottom surface processing module. The supplementary structure processing module includes a staircase processing submodule 6 and an elevator processing submodule 7.

[0026] Furthermore, the noise reduction structure provided by the present invention mainly includes glass wool, fiber felt anti-overflow layer, and perforated plate. In this way, the combination of glass wool and fiber felt can effectively absorb airflow turbulence and reduce the noise caused by airflow impacting the wall of the gantry crane. Secondly, using 1mm fiber felt as an overflow prevention layer can effectively prevent glass wool from escaping, reduce the probability of it entering the air, reduce harm to the human body, and extend the service life of the entire sound-absorbing structure. In addition, the A-type two-layer composite protective panel structure, consisting of a perforated plate and a 3mm thick fiber felt, can effectively maintain the integrity of the sound-absorbing structure while enhancing the absorption of high-frequency noise.

[0027] Furthermore, through modular design and synergy of acoustic units, a significant improvement in noise reduction performance and structural reliability is achieved. The device uses glass wool as the core sound-absorbing material, combined with a fiber felt anti-overflow layer and a type A two-layer composite protective panel to form a broadband noise absorption barrier: 300mm thick glass wool can effectively capture airflow turbulence noise from low to high frequencies, while the 1mm thick fiber felt anti-overflow layer prevents glass wool fibers from escaping through its dense porous structure, ensuring both air quality and personnel safety in the anechoic chamber and extending the service life of the sound-absorbing structure; while the protective panel, which is a composite of perforated board and 3mm thick fiber felt, further enhances the attenuation effect on high-frequency noise while maintaining the stability of the sound-absorbing layer's shape. In addition, differentiated treatments are applied to different parts of the gantry crane, such as the outriggers and crossbeams, as well as supplementary structures such as stairs and elevators, taking into account both noise reduction efficiency and installation practicality, thereby significantly reducing the noise interference caused by airflow impacting the gantry crane.

[0028] Specifically, the outrigger windward surface treatment module includes supporting angle steel, glass wool, anti-overflow layer and A-type two-layer composite protective panel, with an acoustic treatment thickness of 300mm; The outrigger windward surface treatment submodule uses multiple supporting angle steels to be fixedly connected to the gantry crane outrigger 1 steel mechanism. Glass wool is filled between each supporting angle steel. The overall structure is arc-shaped. The outside of the supporting angle steel is successively covered with an anti-overflow layer, an A-type perforated plate and a thick fiber felt. The overflow prevention layer is made of 1mm fiber felt to prevent glass wool from escaping through the perforated plate; The thickness of the thick fiber felt is 3 mm.

[0029] Furthermore, the outrigger windward surface treatment module is fixedly connected to the steel structure of the gantry crane outrigger 1 through multiple supporting angle steels to form an arc-shaped composite structure. Structurally, the arc design combined with the von Kármán curve optimizes the airflow distribution, guides the airflow to pass smoothly, reduces the generation of turbulent separation and impact noise, and at the same time, the arc surface can disperse the airflow pressure, avoid the local stress concentration that is easy to be generated in the flat plate structure, and improve the overall structure's wind load resistance. Acoustically, the sturdy frame supported by angle steel provides reliable support for the 300mm thick glass wool filling, ensuring uniform sound-absorbing layer thickness and guaranteeing broadband noise absorption. The outer side is successively covered with a 1mm fiber felt anti-overflow layer and an A-type composite protective panel consisting of a perforated plate and a 3mm thick fiber felt. This not only prevents glass wool from escaping through the dense pores of the fiber felt, ensuring environmental safety, but also maintains the shape of the protective panel to prevent deformation of the sound-absorbing layer. At the same time, the 3mm thick fiber felt further enhances the absorption efficiency of high-frequency noise, achieving synergistic optimization of acoustic performance and structural stability.

[0030] Specifically, the other surface treatment module of the outrigger is based on the rectangular steel frame structure of the gantry crane outrigger 1 to cover it, specifically by covering the leeward side and two sides of the gantry crane outrigger 1 with the other surface treatment module. The other surface treatment modules of the outrigger are fixed by multiple supporting angle steels, and glass wool is filled between each supporting angle steel. The filling thickness of the glass wool is 300mm. The outer side of the supporting angle steel is sequentially covered with an anti-overflow layer, an A-type perforated plate, and a thick fiber felt; A connecting angle steel is provided between the anti-overflow layer and the A-type perforated plate.

[0031] Furthermore, the other surface treatment modules for the outriggers are designed for the rectangular steel frame structure of the gantry crane outrigger 1. They are modularly wrapped with multiple supporting angle steels, which has the structural features of high efficiency and economic practicality. The standardized supporting angle steel is used as the skeleton to adapt to the flat shape of the leeward side and the side of the outrigger, simplifying the installation process and reducing the processing difficulty and cost of irregular structures. The uniform filling of 300mm thick glass wool ensures stable absorption of mid-to-low frequency noise. The fiber felt anti-overflow layer and the A-type composite protective panel (perforated board + 3mm fiber felt) set on the outside not only prevent the risk of glass wool leakage through the anti-overflow layer, but also maintain the shape of the sound-absorbing layer through the protective panel. At the same time, the addition of connecting angle steel provides auxiliary support between the anti-overflow layer and the protective panel, further enhancing the overall structure and deformation resistance. While ensuring the noise reduction effect, it also takes into account the maintainability and environmental friendliness of the structure.

[0032] Specifically, the support beam windward surface treatment module is set in an arc shape and is divided into an upper sub-module of the support beam windward surface and a lower sub-module of the support beam windward surface; The upper sub-module structure of the windward surface of the outrigger beam is consistent with the structure of the windward surface treatment module of the outrigger. The lower sub-module of the windward side of the outrigger beam is set on the traveling mechanism at the lower end of the outrigger beam of the gantry crane, and includes a sealing layer; The sealing layer is made of 1mm galvanized steel plate and is installed on the outside of the outrigger crossbeam traveling mechanism and in the gap between the traveling mechanism and the outrigger crossbeam. The sealing layer is provided with reinforcing angle steel to form a reinforcing rib structure; The outer side of the sealing layer is sequentially provided with glass wool, an anti-overflow layer and a type A two-layer composite protective panel; The Type A two-layer composite protective panel is composed of a perforated board and a thick fiber felt.

[0033] Furthermore, its upper sub-module and the support leg windward surface treatment module adopt the same structure. By standardizing the production and installation of core acoustic components (300mm glass wool, A-type protective panel), the design and manufacturing costs are reduced, while ensuring the uniformity and reliability of acoustic performance and guaranteeing the balance of the overall noise reduction effect. The lower sub-module is specifically designed for the special area of ​​the traveling mechanism at the lower end of the crossbeam. By setting a sealing layer made of 1mm galvanized steel plate, the noise leakage problem between the traveling mechanism and the crossbeam is precisely sealed. At the same time, the rib structure made of angle steel is strengthened to give it high strength and deformation resistance, ensuring the structural stability under dynamic operation of the equipment. In addition, the combination of glass wool, anti-overflow layer and A-type protective panel extending to the outside of the sealing layer not only blocks the sound leakage path, but also absorbs the eddies and structural noise that may be generated in the gaps, forming a double barrier of sealing and sound absorption, suppressing the noise source inside the structure, thereby maximizing the noise reduction effect of the entire beam's windward side. Furthermore, firstly, 300mm thick glass wool and type A two-layer composite protective panel (composed of a perforated plate of specific specifications and thick fiber felt) are pre-designed as standard-sized acoustic module units. Using a special mold, the cut glass wool is precisely filled into the frame prefabricated by the supporting angle steel and type A protective panel to complete the overall encapsulation and pressing of the module, ensuring uniform density and size.

[0034] Specifically, the surfaces of both the top surface treatment module and the side surface treatment module of the support beam adopt a flat plate structure. The top surface treatment module and the side surface treatment module of the support beam form a C-shaped structure with the opening facing downwards. A sealing layer is provided at the opening of the C-shaped structure; The C-shaped structure is formed by supporting angle steel, with angle steel extensions on the outside of the supporting angle steel and filled with glass wool; The outer side of the supporting angle steel is successively wrapped with an anti-overflow layer, an A-type perforated plate, and a thick fiber felt; A connecting angle steel is provided between the anti-overflow layer and the A-type perforated plate.

[0035] Furthermore, the top and side treatment modules of the support beam are integrated into a single, downward-opening "shell" structure. Through a stable frame composed of supporting angle steel and extending angle steel, the problem of sound leakage that easily occurs at the connection between the top and side in traditional split installation is first solved, achieving full-enclosed treatment of the sound source. In terms of structural manufacturing, 300mm thick glass wool is installed on the outside of the C-shaped structure to ensure the integrity and continuity of the sound-absorbing material and avoid acoustic performance shortcomings caused by segmented installation. Meanwhile, the overflow protection layer wrapped around the outside, the A-type protective panel, and the connecting angle steel between them provide shape maintenance and impact resistance for the entire C-type structure, ensuring the durability of the structure in long-term outdoor environments. This not only simplifies the on-site installation process and reduces construction complexity and cost, but also improves the integrity and reliability of the overall noise reduction effect.

[0036] Specifically, the top crossbeam windward surface treatment module includes a high windward surface sub-module and a low windward surface sub-module; The high windward surface module is used to shield the hoisting mechanism of the gantry crane, and the low windward surface module is used to shield the top crossbeam and guardrail of the gantry crane. The high windward surface module includes supporting angle steel, connecting angle steel, glass wool, anti-overflow layer, and A-type two-layer composite protective panel. The number of the high windward surface sub-modules is two sets, and they are symmetrically arranged on both sides of the lifting mechanism; The tops of the two sets of high windward surface modules are supported by connecting angle steel. The low windward surface module and the high windward surface module are configured accordingly.

[0037] Furthermore, the top crossbeam windward surface treatment module achieves high synergy by dividing the treatment area into high and low windward surface sub-modules. The high windward surface sub-module is designed specifically for shielding the lifting mechanism where the sound source is concentrated and the noise intensity is high. It adopts two sets of symmetrically arranged structures, which not only achieves 360-degree wrapping of the sound source, but also effectively balances the force and noise reflection on both sides, ensuring the stability and efficiency of the core noise reduction area. Its top is integrated with the connecting angle steel for support, providing a stable skeleton for the entire upper structure. The low-profile frontal modules cover the top beams and handrails, forming a complete and continuous acoustic barrier to prevent noise leakage caused by structural gaps or omissions. This ensures that each part of the structure can achieve maximum noise reduction efficiency. At the same time, the modular design allows all components (such as supporting angle steel, glass wool, and A-type protective panels) to be prefabricated in a standardized manner. On-site assembly is quick and easy, which not only significantly shortens the construction cycle and reduces installation difficulty and cost, but also ensures the uniformity and reliability of acoustic performance.

[0038] Specifically, the top crossbeam side treatment module is configured in correspondence with the high windward surface sub-module; The side treatment module of the top crossbeam is flush with the height of the high windward surface module; A reinforcing angle steel is provided at the corner connection between the top beam side treatment module and the top beam, and a supporting angle steel is provided on the back of the top beam side treatment module. The bottom surface treatment module of the top crossbeam is set up in correspondence with the side surface treatment module of the top crossbeam.

[0039] Furthermore, by installing reinforcing angle steel at the corner connection, the problem of weak stress at the right angle of the structure is solved, the rigidity and wind load resistance of the overall structure are improved, and noise diffraction and leakage caused by abrupt changes in geometry are prevented at the acoustic level. The back support angle steel configuration ensures the stability and flatness of the side panel installation, providing a reliable guarantee for the performance of the acoustic materials; The bottom treatment module and the corresponding side panel together form a comprehensive noise reduction structure that wraps around the top beam, greatly enhancing the sound absorption and noise reduction effect, ensuring the integrity and balance of the overall noise reduction performance, and preventing sound waves from leaking to the side or bottom.

[0040] Specifically, the staircase processing submodule 6 is designed based on the hollow structure of the gantry crane staircase; The staircase treatment submodule 6 specifically involves using a composite sound-absorbing felt structure to wrap and cover the handrails, steps, and platforms of the staircase. The composite sound-absorbing felt structure consists of an inner layer of 3mm glass wool, a middle layer of 5mm composite sound-absorbing cotton, and an outer layer of thick fiber felt. The composite sound-absorbing cotton is made of glass fiber and polyurethane mixed in a 1:1 ratio.

[0041] Furthermore, by adopting a sandwich-style composite structure, excellent sound absorption effect with a wide frequency band is achieved. The outer thick fiber felt plays a protective and decorative role, effectively wrapping the complex surface of the staircase and solving the problems of traditional treatment methods that are difficult to fit and have dead sound absorption corners. It not only maximizes the use of the internal space of the staircase, turning it into a highly efficient sound absorber, and significantly reduces the structural noise and footsteps generated when people walk on the staircase, but also has good flexibility and durability, ensuring stable performance in complex outdoor environments.

[0042] Specifically, the elevator processing submodule 7 is composed of a sealing layer, glass wool, an anti-overflow layer, and a type A two-layer composite protective panel; The elevator processing submodule 7 is C-shaped and adopts a fully shielded structure, covering the outer surface of the elevator.

[0043] In summary: By precisely zoning the distribution and characteristics of noise sources in gantry cranes, core high-noise areas such as the hoisting mechanism are custom-wrapped with high-wind-facing sub-modules. The internal filling with high-efficiency sound-absorbing materials such as glass wool can convert sound energy into heat energy for dissipation. Complex structures such as the top beams and stairs are seamlessly covered by corresponding side, bottom, and stair treatment sub-modules 6, forming closed or semi-closed sound-absorbing cavities. This increases the number of reflections and absorptions of sound waves along the propagation path, thus constructing a sound-absorbing barrier from both the source and the propagation path, thereby reducing the overall noise radiation intensity. All treatment modules consist of standardized support, connection, sound absorption, and facing components, which can be prefabricated in the factory and quickly assembled on site to complete the construction. This not only simplifies the on-site operation process, shortens the construction period, reduces labor costs and the impact on the normal operation of the gantry crane, but also ensures the uniformity of installation accuracy and noise reduction effect, while making subsequent maintenance and replacement extremely convenient.

[0044] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An acoustic treatment device for a gantry crane inside a wind tunnel testing chamber, characterized in that, Including the gantry crane acoustic processing module, specifically: Leg processing module (3), leg beam processing module (4), top beam processing module (5), supplementary structural processing module and acoustic processing unit; The outrigger processing module (3) is divided into an outrigger windward surface processing module and an outrigger other surface processing module. The other surface processing module includes an outrigger leeward surface processing sub-module and an outrigger side surface processing sub-module. The support beam processing module (4) includes a support beam windward surface processing module, a support beam top surface processing module, and a support beam side surface processing module; The top beam processing module (5) includes a top beam windward surface processing module, a top beam side surface processing module and a top beam bottom surface processing module; The supplementary structure processing module includes a staircase processing submodule (6) and an elevator processing submodule (7).

2. The acoustic treatment device for a gantry crane in a wind tunnel testing room according to claim 1, characterized in that: The outrigger windward surface treatment module includes supporting angle steel, glass wool, spill prevention layer and type A two-layer composite protective panel; The outrigger windward surface treatment submodule uses multiple supporting angle steels to be fixedly connected to the gantry crane outrigger (1) steel mechanism. Glass wool is filled between each supporting angle steel. The overall structure is set in an arc shape. The outside of the supporting angle steel is covered with an anti-overflow layer, an A-type perforated plate and a thick fiber felt in sequence. The overflow prevention layer is made of a single layer of fiber felt to prevent glass wool from escaping through the perforated plate.

3. The acoustic treatment device for a gantry crane in a wind tunnel testing room according to claim 1, characterized in that: The other surface treatment module of the outrigger is based on the rectangular steel frame structure of the gantry crane outrigger (1) to cover the leeward side and two sides of the gantry crane outrigger (1). The other surface treatment modules of the outrigger are fixed by multiple supporting angle steels, and glass wool is filled between each supporting angle steel; The outer side of the supporting angle steel is sequentially covered with an anti-overflow layer, an A-type perforated plate, and a thick fiber felt; A connecting angle steel is provided between the anti-overflow layer and the A-type perforated plate.

4. The acoustic treatment device for a gantry crane in a wind tunnel testing room according to claim 1, characterized in that: The support beam windward surface treatment module is set in an arc shape and is divided into an upper sub-module of the support beam windward surface and a lower sub-module of the support beam windward surface. The upper sub-module structure of the windward surface of the outrigger beam is consistent with the structure of the windward surface treatment module of the outrigger. The lower sub-module of the windward side of the outrigger beam is set on the traveling mechanism at the lower end of the outrigger (1) beam of the gantry crane, including the sealing layer; The sealing layer is made of galvanized steel sheet and is installed on the outside of the outrigger crossbeam traveling mechanism and in the gap between the traveling mechanism and the outrigger crossbeam. The sealing layer is provided with reinforcing angle steel to form a reinforcing rib structure; The outer side of the sealing layer is sequentially provided with glass wool, an anti-overflow layer and a type A two-layer composite protective panel; The Type A two-layer composite protective panel is composed of a perforated board and a thick fiber felt.

5. The acoustic treatment device for a gantry crane in a wind tunnel testing room according to claim 1, characterized in that: The surfaces of the top surface treatment module and the side surface treatment module of the leg beam are both made of flat plate structure. The top surface treatment module and the side surface treatment module of the support beam form a C-shaped structure with the opening facing downwards. A sealing layer is provided at the opening of the C-shaped structure; The C-shaped structure is formed by supporting angle steel, with angle steel extensions on the outside of the supporting angle steel and filled with glass wool; The outer side of the supporting angle steel is successively wrapped with an anti-overflow layer, an A-type perforated plate, and a thick fiber felt; A connecting angle steel is provided between the anti-overflow layer and the A-type perforated plate.

6. The acoustic treatment device for a gantry crane in a wind tunnel testing room according to claim 1, characterized in that: The top crossbeam windward surface treatment module includes a high windward surface sub-module and a low windward surface module; The high windward side module is used to shield the hoisting mechanism of the gantry crane, and the low windward side module is used to shield the top crossbeam and handrail of the gantry crane.

7. The acoustic treatment device for a gantry crane in a wind tunnel testing room according to claim 6, characterized in that: The high windward surface module includes supporting angle steel, connecting angle steel, glass wool, anti-overflow layer, and type A two-layer composite protective panel; The number of the high windward surface sub-modules is two sets, and they are symmetrically arranged on both sides of the lifting mechanism; The tops of the two sets of high windward surface modules are supported by connecting angle steel. The low windward surface module and the high windward surface module are configured accordingly.

8. The acoustic treatment device for a gantry crane in a wind tunnel testing room according to claim 6, characterized in that: The top crossbeam side treatment module is correspondingly set with the high windward surface module; The side treatment module of the top crossbeam is flush with the height of the high windward surface module; A reinforcing angle steel is provided at the corner connection between the top beam side treatment module and the top beam, and a supporting angle steel is provided on the back of the top beam side treatment module. The bottom surface treatment module of the top crossbeam is set up in correspondence with the side surface treatment module of the top crossbeam.

9. The acoustic treatment device for a gantry crane in a wind tunnel testing room according to claim 1, characterized in that: The staircase processing submodule (6) is designed based on the hollow structure of the gantry crane staircase; The staircase treatment submodule (6) specifically involves using a composite sound-absorbing felt structure to wrap and cover the handrails, steps, and platforms of the staircase. The composite sound-absorbing felt structure consists of an inner layer of glass wool, a middle layer of composite sound-absorbing cotton, and an outer layer of thick fiber felt. The composite sound-absorbing cotton is made of glass fiber and polyurethane mixed in a 1:1 ratio.

10. The acoustic treatment device for a gantry crane in a wind tunnel testing room according to claim 1, characterized in that: The elevator processing submodule (7) consists of a sealing layer, glass wool, an anti-overflow layer, and a type A two-layer composite protective panel; The elevator processing submodule (7) is arranged in a C-shape and adopts a fully shielded structure to cover the outer surface of the elevator.

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