Vertical mixed flow pump house coupling layer noise control device

Abstract

The utility model discloses a vertical mixed flow pump house coupling layer noise control device, including galvanized square tube ring, galvanized square tube support, steel sheet and polyester fiber plate, the galvanized square tube ring has two groups of different diameter size, and the galvanized square tube support is fixedly connected between two groups of galvanized square tube rings, and the steel sheet is fixedly connected between the galvanized square tube ring every 8~10 even, and the steel sheet thickness is 3mm, and one end of every group steel plate is fixedly connected with thick polyester fiber plate, and the polyester fiber plate is fixed on the steel sheet along the center of circle divergence direction, the utility model sets up in the structure beam nest space, has no influence to the overall space layout and visual effect of coupling layer, has maintained the simple and beautiful of coupling layer space, and the overall material cost is low, has also reduced the long -term maintenance cost of equipment, compared with the large -scale airtight sound shield such as steel sheet sound shield cover, this noise control device is not closed, and the air inlet gas chamber is directly formed in the structure beam, can ensure that the demand of coupling layer air inlet heat dissipation is satisfied.

Description

Technical Field

[0001] This utility model relates to the field of sound control technology, specifically a noise control device for the coupling layer of a vertical mixed-flow pump room. Background Technology

[0002] Vertical mixed-flow pump houses are core facilities in water conservancy irrigation, urban water supply, and industrial circulating water systems. The coupling layer, as the connection area between the pump motor and impeller, is one of the main noise sources. Furthermore, the coupling layer of a vertical mixed-flow pump house not only needs noise reduction but also requires air intake and heat dissipation. Therefore, if the coupling layer is installed using a traditional soundproof enclosure, typically a sealed steel plate enclosure, it requires an additional mechanical ventilation system. This involves adding sound-absorbing louvers to the air inlet and axial flow fans and impedance silencers to the air outlet. Overall, the ventilation effect is not ideal, the soundproof enclosure is inconvenient to install, and the subsequent maintenance of the axial flow fans and impedance silencers must be considered, resulting in high overall costs. Therefore, those skilled in the art have provided a noise control device for the coupling layer of a vertical mixed-flow pump house to solve the problems mentioned in the background art. Utility Model Content

[0003] The purpose of this invention is to provide a noise control device for the coupling layer of a vertical mixed-flow pump house to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A noise control device for the coupling layer of a vertical mixed-flow pump station includes galvanized square tube rings, galvanized square tube support rods, steel sheets, and polyester fiber boards. The galvanized square tube rings are divided into two sets with different diameters. Galvanized square tube support rods are fixedly connected between the two sets of galvanized square tube rings. Steel sheets with a thickness of 3mm are evenly fixedly connected between the galvanized square tube rings at intervals of 8° to 10°. A thick polyester fiber board is fixedly connected to one end of each set of steel plates, and the polyester fiber board is fixed on the steel plate in a radiating direction from the center.

[0006] Furthermore, the galvanized square tube ring is made of 40mm×20mm galvanized square tube material.

[0007] Furthermore, the galvanized square tube support rod is made of 40mm×40mm galvanized square tube material.

[0008] Furthermore, the thick polyester fiberboard is folded at a 45° angle along the height direction of the frame, with the folding position designed so that sound waves do not penetrate the gaps between the polyester fiberboards in a straight line.

[0009] Furthermore, the surface of the polyester fiber board is covered with a 0.5mm thick metal micro-perforated plate with a perforation rate of 1%-5% and a pore diameter of 0.5mm. An air layer of 0.1mm is provided between the polyester fiber board and the metal micro-perforated plate.

[0010] By adopting the above technical solution

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. In terms of noise reduction performance, the composite sound-absorbing structure of "metal micro-perforated plate + polyester fiber plate" is combined with a precise design of 1%-5% perforation rate and 0.5mm pore diameter, which can cover the wide frequency range of noise of 200-8000Hz in the coupling layer, thus broadening the noise reduction frequency band. At the same time, the 45° folded edge design of the polyester fiber plate can prevent sound waves from penetrating the gap between the plates in a straight line, solving the "noise reduction loophole" problem of traditional ring device, improving the overall noise control efficiency, and effectively preventing local noise escape.

[0013] 2. In terms of practical application value, this device is installed within the space of the structural beam recess, without affecting the overall spatial layout and visual effect of the coupling layer, maintaining the simplicity and aesthetics of the coupling layer space. The structure consists of galvanized square tubes, 3mm thick steel sheets, and 15mm thick polyester fiberboard, resulting in low overall material costs and reducing long-term maintenance costs. Compared with large, sealed soundproof enclosures such as steel plate soundproof covers, this noise control device is not enclosed and directly forms an air intake chamber within the structural beam, ensuring that the air intake and heat dissipation requirements of the coupling layer are met. Installation is also convenient. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of a noise control device for the coupling layer of a vertical mixed-flow pump house;

[0015] Figure 2 This is a schematic diagram of a vertical mixed-flow pump room coupling layer noise control device from another angle.

[0016] Figure 3 This is a schematic diagram of the structure of a combination of galvanized square tube ring and galvanized square tube support rod in a noise control device for the coupling layer of a vertical mixed-flow pump room.

[0017] Figure 4 A top view of a noise control device for the coupling layer of a vertical mixed-flow pump house;

[0018] Figure 5 This is a schematic diagram of the structure after the installation of a noise control device for the coupling layer of a vertical mixed-flow pump house.

[0019] In the diagram: 1. Galvanized square tube ring; 2. Galvanized square tube support rod; 3. Steel sheet; 4. Polyester fiberboard. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] Please see Figures 1-5This utility model provides an embodiment of a noise control device for a vertical mixed-flow pump room coupling layer, comprising a galvanized square tube ring 1, a galvanized square tube support rod 2, steel sheets 3, and a polyester fiber plate 4. The galvanized square tube ring 1 has two sets with different diameters, and the galvanized square tube support rod 2 is fixedly connected between the two sets of galvanized square tube rings 1. Steel sheets 3, 3mm thick, are uniformly fixedly connected between the galvanized square tube rings 1 at intervals of 8° to 10°. A thick polyester fiber plate 4 is fixedly connected to one end of each set of steel plates, and the polyester fiber plate 4 is fixed to the steel sheet 3 in a radiating direction from the center. The galvanized square tube ring 1 is made of 40mm × 20mm galvanized square tube material. The galvanized square tube support rod 2 is made of 40mm×40mm galvanized square tube material. Thick polyester fiber board 4 is folded at a 45° angle along the height of the frame. The folding position is designed so that sound waves do not penetrate the gaps between the polyester fiber boards 4 in a straight line. A 0.5mm thick metal micro-perforated plate is covered on the surface of the polyester fiber board 4. The perforation rate of the metal micro-perforated plate is 1%-5%, and the hole diameter is 0.5mm. A 0.1mm air layer is placed between the polyester fiber board 4 and the metal micro-perforated plate. A 40mm×20mm galvanized square tube ring 1 (two sets of different diameters) forms the annular skeleton, which is then used to secure the 40mm×40mm galvanized square tube support rod 2. A fixed connection is formed to create a rigid and stable frame structure, ensuring the reliability of the device's installation in the humid and vibrating environment of the pump room, and providing a uniformly stressed fixed carrier for subsequent sound-absorbing components. Noise initially acts on the 0.5mm thick metal micro-perforated plate on the outer layer of the device, combined with a 0.1mm air layer between the plate and the polyester fiber plate, forming a "micro-perforated plate-air layer" resonance system. When the sound wave frequency matches the system's natural frequency, the air column within the air layer reciprocates, converting the acoustic energy of mid-to-low frequency noise (the main noise from the coupling layer, such as pump unit mechanical vibration and shaft coupling noise) into heat energy through viscous damping. The residual sound waves (mainly mid-to-high frequencies, such as fluid disturbance and component friction noise) after initial treatment penetrate the micro-perforated plate and enter the interior of the polyester fiber board 4. The porous structure of the polyester fiber (high porosity and good connectivity) causes the sound waves to induce air molecule friction and fiber vibration, further dissipating the sound energy and achieving efficient absorption of mid-to-high frequency noise. The polyester fiber board 4 is folded at 45° along the height of the frame, and the "staggered shielding" prevents the sound waves from directly penetrating the gaps between the boards, eliminating "sound leakage". In terms of noise reduction performance, the composite sound absorption structure of "metal micro-perforated plate + polyester fiber board 4" combined with a perforation rate of 1%-5% and 0.The precise design with a 5mm aperture can cover a wide frequency range of noise from 200-8000Hz in the coupling layer, broadening the noise reduction band. Simultaneously, the 45° folded edge design of the polyester fiber board 4 prevents sound waves from penetrating the gaps between the boards in a straight line, solving the "noise reduction loophole" problem of traditional ring devices. This improves overall noise control efficiency and effectively prevents local noise escape. In practical application, this device is installed within the structural beam recess space, having no impact on the overall spatial layout and visual effect of the coupling layer, maintaining its simplicity and aesthetics. The structure consists of galvanized square tubing, 3mm thick steel sheet 3, and 15mm thick polyester fiber board 4, resulting in low overall material costs and reduced long-term maintenance costs. Compared to large, sealed soundproof enclosures such as steel plate soundproof covers, this noise control device is not enclosed and directly forms an air intake chamber within the structural beam, ensuring that the air intake and heat dissipation requirements of the coupling layer are met. Installation is also convenient.

[0022] Using 40mm×20mm galvanized square tube rings 1 (two sets of different diameters) as the annular skeleton, and fixedly connected with 40mm×40mm galvanized square tube support rods 2, a rigid and stable frame structure is formed. This ensures the reliability of the device installation in the humid and vibrating environment of the pump room, and provides a uniformly stressed fixed carrier for the subsequent sound-absorbing components. Noise first acts on the 0.5mm thick metal micro-perforated plate on the outer layer of the device, combined with the 0.1mm air layer between the plate and the polyester fiber board 4, forming a "micro-perforated plate-air layer" resonance system: when the sound wave frequency matches the system's natural frequency, the air column in the air layer generates reciprocating vibration, which is transmitted through the adhesive... The damping effect converts the acoustic energy of low- and mid-frequency noise (main noise of the coupling layer, such as mechanical vibration of the pump group and coupling noise of the shaft system) into heat energy. The remaining sound waves after preliminary treatment (mainly mid- and high-frequency, such as fluid disturbance and component friction noise) penetrate the micro-perforated plate and enter the interior of the polyester fiber board 4. The porous structure of the polyester fiber (high porosity and good connectivity) causes the sound waves to induce air molecule friction and fiber vibration, further dissipating the sound energy and achieving efficient absorption of mid- and high-frequency noise. The polyester fiber board 4 is folded at 45° along the height of the frame. Through "staggered shielding", the sound waves are prevented from directly penetrating the gaps between the boards, thus eliminating "sound leakage".

[0023] In terms of noise reduction performance, the composite sound-absorbing structure of "metal micro-perforated plate + polyester fiber plate 4", combined with a precise design of 1%-5% perforation rate and 0.5mm pore diameter, can cover a wide frequency range of 200-8000Hz noise in the coupling layer, broadening the noise reduction frequency band. Simultaneously, the 45° folded edge design of the polyester fiber plate 4 prevents sound waves from penetrating the gaps between the plates in a straight line, solving the "noise reduction loophole" problem of traditional ring devices, thus improving overall noise control efficiency and effectively preventing local noise escape. In terms of practical application value, this… The device is installed within the space of the structural beam recess, without affecting the overall spatial layout and visual effect of the coupling layer, maintaining the simplicity and aesthetics of the coupling layer space. The structure consists of galvanized square tubes, 3mm thick steel sheets 3, and 15mm thick polyester fiberboard 4, resulting in low overall material costs and reducing long-term maintenance costs. Compared with large, sealed soundproof enclosures such as steel plate soundproof covers, this noise control device is not enclosed and directly forms an air intake chamber within the structural beam, ensuring that the air intake and heat dissipation requirements of the coupling layer are met. Installation is also convenient.

[0024] This specification describes embodiments, but not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A noise control device for the coupling layer of a vertical mixed-flow pump house, characterized in that, The system includes galvanized square tube rings (1), galvanized square tube support rods (2), steel sheets (3), and polyester fiberboard (4). The galvanized square tube rings (1) have two sets with different diameters. The two sets of galvanized square tube rings (1) are fixedly connected by galvanized square tube support rods (2). Steel sheets (3) are evenly fixedly connected between the galvanized square tube rings (1) at 8°~10° intervals. The steel sheets (3) are 3mm thick. A thick polyester fiberboard (4) is fixedly connected to one end of each set of steel sheets. The polyester fiberboard (4) is fixed on the steel sheet (3) in a radiating direction from the center.

2. The noise control device for the coupling layer of a vertical mixed-flow pump house according to claim 1, characterized in that, The galvanized square tube ring (1) is made of 40mm×20mm galvanized square tube material.

3. The noise control device for the coupling layer of a vertical mixed-flow pump house according to claim 1, characterized in that, The galvanized square tube support rod (2) is made of 40mm×40mm galvanized square tube material.

4. The noise control device for the coupling layer of a vertical mixed-flow pump house according to claim 1, characterized in that, The thick polyester fiber board (4) is folded at 45° along the height direction of the frame, and the position of the fold is based on the principle that the sound wave does not penetrate the gap between the polyester fiber boards (4) in a straight line.

5. A noise control device for the coupling layer of a vertical mixed-flow pump house according to claim 1, characterized in that, The surface of the polyester fiber board (4) is covered with a 0.5mm thick metal micro-perforated plate with a perforation rate of 1%-5% and a pore diameter of 0.5mm. An air layer of 0.1mm is provided between the polyester fiber board (4) and the metal micro-perforated plate.

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