Method for reducing vibration and noise of a ship's air pipe

Abstract

The application provides a ship air pipe vibration reduction and noise reduction method, and the steps of the method comprise the following: pretreating the surface of the air pipe; cutting a damping and sound insulation plate and an aerogel plate; bonding and covering the damping and sound insulation plate on the surface of the air pipe, filling the gaps between the adjacent damping and sound insulation plates after the installation of the damping and sound insulation plate is completed; bonding the aerogel plate on the surface of the damping and sound insulation plate, and pasting an aluminum foil cloth on the surface of the aerogel plate after the bonding of the aerogel plate is firm, and the joint of the aluminum foil cloth is staggered with the joint of the aerogel plate. The above method can achieve the purpose of air pipe vibration reduction and noise reduction, and can ensure the long-term heat insulation performance of the pipeline, and the above method is suitable for the pipeline of air conditioning and ventilation systems for various personnel to live or work.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction and noise reduction for ships, and in particular to a method for vibration reduction and noise reduction of ship ventilation ducts. Background Technology

[0002] Ship ventilation systems are primarily used to supply fresh air from outside the ship, remove harmful gases and impurities, and mix the air between compartments to ensure the health of the crew. However, ship ventilation systems generate noise, which can travel through the ducts to various compartments, affecting the daily lives and work of the crew and causing physiological and psychological harm. Furthermore, the noise from ship ventilation systems can directly threaten their concealment. Therefore, noise control of ventilation ducts is particularly important, directly determining the range and area of ​​noise transmission. Thus, when designing and manufacturing ship compartments, the noise level of the compartments must meet certain design requirements.

[0003] Currently, most research on noise control in air conditioning and ventilation systems focuses on controlling the noise levels of components such as compressors, fans, and silencers in the duct system. For example, to reduce the transmission and impact of airflow noise, common methods include adding silencers to ventilation ducts, increasing duct diameter to reduce duct velocity, avoiding ducts in areas with high noise requirements, and thickening duct walls. These measures increase the weight of the ducts and place high demands on spatial arrangement. Furthermore, the temperature difference between the ventilation ducts and the outside environment leads to heat loss due to heat transfer between the gas inside the ducts and the environment. Summary of the Invention

[0004] In view of the shortcomings of the above-mentioned related technologies, the purpose of this invention is to provide a method for vibration reduction and noise reduction of ship ducts to solve the above problems.

[0005] To achieve the above and other related objectives, the present invention provides a method for vibration reduction and noise reduction of ship ducts. The method includes the following steps: pre-treating the surface of the duct; cutting damping sound insulation boards and aerogel boards; bonding the damping sound insulation boards to cover the surface of the duct, and filling the gaps between adjacent damping sound insulation boards after the installation of the damping sound insulation boards; bonding the aerogel boards to the surface of the damping sound insulation boards; and after the aerogel boards are firmly bonded, pasting aluminum foil on the surface of the aerogel boards, with the seams of the aluminum foil staggered from the seams of the aerogel boards.

[0006] Optionally, the step of pre-treating the duct surface is as follows: cleaning the oil and grease on the duct surface and roughening the duct surface.

[0007] Optionally, the step of pre-treating the duct surface further includes: if the duct surface is coated with paint, roughening the duct surface while retaining the primer.

[0008] Optionally, the steps of cutting the damping sound insulation board and the aerogel board are as follows: place the damping sound insulation board on the surface of the duct and draw lines and lay out the pattern, cut the board according to the position of the drawn lines, and use the cut damping sound insulation board as a template to cut the aerogel board.

[0009] Optionally, the step of bonding the damping sound insulation board to the surface of the duct is as follows: in an environment with a temperature of 15℃~35℃ and an air relative humidity of ≤85%, apply adhesive to the bonding area on the duct surface and the bonding surface of the damping sound insulation board, bond the damping sound insulation board to the duct, and tap the damping sound insulation board with a rubber hammer.

[0010] Optionally, two coats of adhesive can be applied to the bonding area of ​​the duct and the bonding surface of the damping sound insulation board. After the first coat of adhesive has dried to the touch, the second coat of adhesive can be applied.

[0011] Optionally, when striking the damping sound insulation board with a rubber hammer, the striking is performed layer by layer from the center outwards.

[0012] Optionally, the step of bonding the aerogel sheet to the surface of the damping sound insulation board is as follows: in an environment with a temperature of 15℃~35℃ and an air relative humidity of ≤85%, a layer of adhesive is applied to the surface of the damping sound insulation board, the aerogel sheet is attached to the surface of the damping sound insulation board coated with adhesive, and the aerogel sheet is wrapped tightly with cloth tape.

[0013] Optionally, the method further includes the following steps: applying flame-retardant white adhesive to the surface of the aluminum foil, attaching the cut flame-retardant white cloth to the surface of the aluminum foil, and pressing them together.

[0014] Optionally, the method further includes the following steps: after the flame-retardant white cloth is wrapped, a layer of latex paint is applied to the surface of the flame-retardant white cloth.

[0015] As described above, the ship duct vibration reduction and noise reduction method of the present invention has the following beneficial effects: the damping sound insulation board and the aerogel board isolate and absorb vibration and noise, effectively suppressing the transmission of vibration through the duct and bulkhead structure, while reducing sound transmission energy, thus achieving the purpose of vibration reduction and noise reduction of the duct. Simultaneously, the aerogel board can reduce heat conduction and heat radiation on the duct surface, achieving the effect of heating the air supply duct in winter and insulating the cooling duct in summer. Furthermore, the aluminum foil on the outer surface of the aerogel board prevents the aerogel from breathing, avoiding condensation due to the temperature difference between the inside and outside during summer cooling conditions, ensuring the long-term heat insulation performance of the duct. The composite material composed of the damping sound insulation board, aerogel board, and aluminum foil in this invention has the characteristics of low toxicity, sound insulation, heat insulation, sound absorption, low density, and convenient construction. The material also has good ductility, bending, and compressibility, ensuring a tight fit between the material and the duct surface, making it suitable for various air conditioning and ventilation systems for residential or working environments. Attached Figure Description

[0016] Figure 1 The diagram shown is a flowchart illustrating the method for reducing vibration and noise in ship ducts according to an embodiment of the present invention.

[0017] Figure 2 The diagram shows a duct that has been treated using a ship duct vibration reduction and noise reduction method in an embodiment of the present invention.

[0018] Component designation explanation

[0019] 1. Air duct; 2. Adhesive; 3. Damping sound insulation board; 4. Sealing putty; 5. Glue; 6. Aerogel board; 7. Aluminum foil cloth; 8. Flame retardant white glue; 9. Flame retardant white cloth; 10. Latex paint. Detailed Implementation

[0020] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0021] In the detailed description of embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0022] For ease of description, spatial relation terms such as “below,” “under,” “lower than,” “below,” “above,” and “upper” may be used herein to describe the relationship between one element or feature shown in the accompanying drawings and other elements or features. It will be understood that these spatial relation terms are intended to include directions other than those depicted in the drawings for the device in use or operation. Furthermore, when a layer is referred to as being “between” two layers, it can be the only layer between the two layers, or there may be one or more layers in between. The phrase “between” as used herein includes both endpoint values.

[0023] In the context of this application, the structure described above the first feature may include embodiments in which the first and second features are formed in direct contact, or embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0024] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] like Figure 1 As shown in the figure, this embodiment discloses a method for vibration reduction and noise reduction of ship ducts, which is used to reduce the noise of ventilation systems. The steps of the method for vibration reduction and noise reduction of ship ducts include:

[0026] S1. Pre-treat the surface of duct 1.

[0027] The pretreatment steps for the surface of duct 1 are as follows: clean the oil and grease from the surface of duct 1, and roughen the surface of duct 1 by sanding. Specifically, first wipe the surface of duct 1 with a cloth to remove dust, and then use different pretreatment methods depending on the material of duct 1. If duct 1 is stainless steel, wipe it with a cotton cloth soaked in acetone or alcohol to remove oil and grease, and then roughen it with sandpaper or abrasive cloth. If the surface of duct 1 is painted, for example, painted carbon steel duct 1 or galvanized duct 1, roughen the surface of duct 1 while retaining the primer. That is, while retaining the primer, roughen the paint with 60# or 80# abrasive cloth to create a certain roughness, and then blow it clean with compressed air or wipe away the dust with a clean cotton cloth. After the surface pretreatment of duct 1 is completed, place duct 1 in a room temperature environment to dry.

[0028] S2, cut damping sound insulation board 3 and aerogel board 6.

[0029] Place the damping and sound insulation board 3 on the surface of the duct 1 and mark and lay out the pattern using a whiteboard marker or oil pen. Cut the duct according to the marked lines. For example, cut the conventional rectangular duct 1 according to the four sides. The cut seams of the four sides should be flat. After cutting, the duct can be preliminarily assembled on the outer surface of the duct 1 to check the correctness of the cutting.

[0030] Using the pre-cut damping sound insulation board 3 as a template, the aerogel board 6 is cut. After the damping sound insulation board 3 and the aerogel board 6 are cut, they are numbered and then assembled in the order of the numbers.

[0031] To ensure a firm bond between the damping sound insulation board 3 and the duct 1, the bonding surfaces of the damping sound insulation board 3 need to be roughened by sanding. For example, use a brush to remove adhesive dust from the surface of the damping sound insulation board 3, and then wipe the bonding surfaces with clean cotton yarn to remove dust, grease, and other contaminants. After the damping sound insulation board 3 has been treated, place the bonding surfaces of the two damping sound insulation boards 3 facing each other or cover them with a clean insulating cloth to prevent recontamination.

[0032] The damping sound insulation board 3 of this embodiment has certain resistance to cross-temperature variation, seawater resistance, oil resistance, salt spray resistance, hot air aging resistance, and mold resistance. The tensile strength of the damping sound insulation board 3 of this embodiment is ≥8MPa, and the thickness is 5mm.

[0033] S3. Adhere the damping sound insulation board 3 to the surface of the air duct 1, and fill the gap between adjacent damping sound insulation boards 3 after the installation of the damping sound insulation board 3 is completed.

[0034] In an environment with a temperature of 15℃~35℃ and a relative humidity of ≤85%, apply adhesive 2 to the bonding area on the surface of the duct 1 and the bonding surface of the damping sound insulation board 3, then bond the damping sound insulation board 3 to the duct 1 and tap the damping sound insulation board 3 with a rubber hammer.

[0035] Specifically, apply two coats of adhesive 2 to both the bonding areas of the duct 1 and the bonding surface of the damping sound insulation board 3. After the first coat of adhesive has touched-dry, apply the second coat. It should be noted that the adhesive application must be even, and bonding should begin from the outer edge of the duct 1. The selected adhesive 2 must have a bonding strength ≥2 MPa with the duct 1 and be non-toxic or low-toxic and flame-retardant. The amount of adhesive 2 used is approximately 1.0 kg / m. 2 This embodiment employs a two-stage adhesive application process, which avoids incomplete coating and prevents air from remaining between the duct 1 and the damping sound insulation board 3, thereby avoiding any impact on the heat insulation and noise reduction effect.

[0036] The specific steps for tapping the damping sound insulation board 3 with a rubber mallet are as follows: When tapping the damping sound insulation board 3 with a rubber mallet, ensure a certain amount of force, tapping layer by layer from the center outwards. Make sure every part is tapped, and apply even force. During the tapping process, hold the damping sound insulation board 3 firmly to prevent it from slipping, warping, or bulging. After one side of the damping sound insulation board 3 is firmly adhered, proceed to the adhesion of the other side.

[0037] After all the damping sound insulation panels 3 have been bonded, clean the gaps between the damping sound insulation panels 3 to ensure that there is no oil or dust in the gaps. Weigh the two components of the sealant putty 4 according to the weight ratio of component A: component B = 2:1, mix them, and stir them thoroughly. Then apply the mixture to fill the gaps. Use a scraper to fill the sealant putty 4 into the gaps, and then smooth it with a scraper. Finally, protect the construction area to prevent contamination by oil or dust.

[0038] After the putty has cured, smooth and sand any uneven areas to make the surface smooth. The amount of sealant 4 mixed each time should be such that application can be completed within 30 minutes. The sealant 4 used must have an adhesion strength ≥4MPa to the duct 1 and be non-toxic or low-toxic and flame-retardant.

[0039] S4. Adhere the aerogel board 6 to the surface of the damping sound insulation board 3. After the aerogel board 6 is firmly adhered, paste aluminum foil 7 on the surface of the aerogel board 6. The seams of the aluminum foil 7 are staggered from the seams of the aerogel board 6.

[0040] First, the outer surface of the damping sound insulation board 3 is sanded, and the sanding dust is blown away. This operation can make the adhesion between the damping sound insulation board 3 and the aerogel board 6 stronger. In an environment with a temperature of 15℃~35℃ and an air relative humidity of ≤85%, a layer of adhesive 5 is applied to the surface of the damping sound insulation board 3. The aerogel board 6 is then attached to the surface of the damping sound insulation board 3 with adhesive 5 applied, and then wrapped tightly with cloth tape. The cloth tape should be kept wrapped for more than 24 hours to enhance the adhesion between the damping sound insulation board 3 and the aerogel board 6. The adhesive 5 has flame retardant properties.

[0041] In this embodiment, the aerogel sheet 6 used has a bulk density ≤220kg / m³. 3 With a moisture absorption rate of ≤3%, tensile strength ≥60KPa, thermal conductivity ≤0.04(W / m·K), and moisture resistance factor ≥1500, this aerogel board 6 is a non-combustible thermal insulation material with low density, low thermal conductivity, non-toxicity, and certain sound absorption effect.

[0042] The aluminum foil 7 used has an air-blocking function, isolating the aerogel board 6 from the outside air and preventing condensation from occurring when there is a temperature difference between the inside and outside of the duct 1. Because the seams of the aluminum foil 7 are staggered from the seams of the aerogel board 6, the aluminum foil 7 can exert a certain restraining force on the aerogel board 6, making the installation of the aerogel board 6 more secure.

[0043] S5. Apply flame-retardant white glue 8 to the surface of aluminum foil cloth 7, and attach the cut flame-retardant white cloth 9 to the surface of aluminum foil cloth 7 and press it firmly.

[0044] Specifically, cut the flame-retardant white cloth 9 to the dimensions of the construction surface. In an environment with a temperature of 15℃~35℃ and a relative humidity ≤85%, evenly apply flame-retardant white adhesive 8 to the surface of the aluminum foil cloth 7 using a brush. When the surface of the flame-retardant white adhesive 8 is slightly dry, attach the cut flame-retardant white cloth 9 to the surface of the aluminum foil cloth 7 and press it firmly. The seams of the flame-retardant white cloth 9 can overlap, with an overlap width of approximately 10mm. After construction, trim the flame-retardant white cloth 9 with scissors, removing any loose threads. Alternatively, the flame-retardant white cloth 9 can be wrapped around the duct 1 according to its shape.

[0045] S6. After the flame-retardant white cloth 9 is wrapped, coat the surface of the flame-retardant white cloth 9 with a layer of latex paint 10.

[0046] Specifically, after the flame-retardant white cloth 9 is wrapped, a layer of latex paint 10 is applied to its surface, with a thickness of approximately 50 μm. The paint color can be consistent with the color of the ship's cabin environment.

[0047] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for vibration reduction and noise reduction of ship ventilation ducts, characterized in that, The steps of the method include: Pre-treat the surface of the air duct; Cutting damping sound insulation boards and aerogel boards; The damping sound insulation board is glued and covered on the surface of the air duct. After the damping sound insulation board is installed, the gap between adjacent damping sound insulation boards is filled. The aerogel sheet is bonded to the surface of the damping sound insulation board. After the aerogel sheet is firmly bonded, aluminum foil is pasted on the surface of the aerogel sheet, and the seams of the aluminum foil are staggered from the seams of the aerogel sheet. The steps for cutting the damping sound insulation board and the aerogel board are as follows: place the damping sound insulation board on the surface of the duct and mark and lay out the pattern. Cut the board according to the marked pattern. Use the cut damping sound insulation board as a template to cut the aerogel board. The steps for bonding the damping sound insulation board to the surface of the duct are as follows: in an environment with a temperature of 15℃~35℃ and an air relative humidity of ≤85%, apply two coats of adhesive to the bonding area on the duct surface and the bonding surface of the damping sound insulation board. After the first coat of adhesive is dry to the touch, apply the second coat of adhesive. Bond the damping sound insulation board to the duct and tap the board with a rubber hammer. When tapping the board with the rubber hammer, tap it layer by layer from the center outwards.

2. The method for vibration reduction and noise reduction of ship ducts according to claim 1, characterized in that: The steps for pre-treating the duct surface are as follows: cleaning the oil and grease off the duct surface and roughening the duct surface.

3. The method for vibration reduction and noise reduction of ship ducts according to claim 2, characterized in that: The pretreatment step for the duct surface also includes: if the duct surface is painted, roughening the duct surface while retaining the primer.

4. The method for vibration reduction and noise reduction of ship ventilation ducts according to claim 1, characterized in that: The steps for bonding the aerogel sheet to the surface of the damping sound insulation board are as follows: in an environment with a temperature of 15℃~35℃ and an air relative humidity of ≤85%, apply a layer of adhesive to the surface of the damping sound insulation board, attach the aerogel sheet to the surface of the damping sound insulation board coated with adhesive, and secure it with cloth tape.

5. The method for vibration reduction and noise reduction of ship ducts according to claim 1, characterized in that: The method further includes the following steps: applying flame-retardant white adhesive to the surface of the aluminum foil, attaching the cut flame-retardant white cloth to the surface of the aluminum foil, and pressing them together tightly.

6. The method for vibration reduction and noise reduction of ship ducts according to claim 5, characterized in that: The method further includes the following steps: after the flame-retardant white cloth is wrapped, a layer of latex paint is applied to the surface of the flame-retardant white cloth.

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