Ventilation pipeline silencing device

Abstract

The utility model discloses a ventilation pipeline silencing device which comprises a ventilation pipe, an air pipe sound absorption layer is arranged in the ventilation pipe and used in cooperation with an air pipe heat preservation interlayer, and the main function of the air pipe sound absorption layer is to effectively absorb various kinds of noise in airflow through the material characteristics of the air pipe sound absorption layer. By means of the design, noise generated during operation of heating and ventilation equipment can be greatly reduced, the quiet comfort degree of the working and living environment is improved, the air pipe heat preservation interlayer can reduce transmission of sound through a pipeline, noise can be further reduced, the air pipe sound absorption layer and the air pipe heat preservation interlayer are cooperatively used, and the noise reduction effect is good. The ventilation pipeline silencing device can achieve multiple effects of noise reduction, heat preservation, energy conservation, environmental protection and the like, the comprehensive design enables the ventilation pipeline silencing device to be more excellent in performance and effect, construction heat preservation materials do not need to be wrapped on the outer wall of the ventilation pipeline, the ventilation pipeline silencing device can be installed in place at a time on a construction site, and construction cost and construction difficulty can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial ventilators, in particular to a ventilation pipeline silencer. Background Art

[0002] At present, in the building ventilation system, the air valves used in the air-conditioning supply and return air ducts and air volume adjustment and switch functions in the HVAC system are made of metal materials such as galvanized plates or stainless steel. Due to the good thermal conductivity and fast heat transfer of metal materials, the temperature changes too much during the air-conditioning supply and return air process, causing air-conditioning energy loss or condensation. In the process of air-conditioning operation, the wind speed fluctuations and air duct vibrations will resonate with the valve body, increase the noise decibel value, and affect the user experience. In order to solve these problems, the external covering insulation layer is currently mainly used for construction, but due to space and pipeline layout reasons, it causes great construction difficulty, overall unsightly, high cost and other disadvantages. Therefore, we need to propose a ventilation duct silencer. Utility Model Content

[0003] The utility model aims to provide a ventilation pipe silencer, aiming to solve the problems in the prior art of great construction difficulty, overall unsightly appearance and high cost in the pipes of the building HVAC system due to space and pipe layout reasons.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A ventilation duct silencer device comprises a ventilation duct, wherein the ventilation duct comprises a duct metal layer, an duct sound absorbing layer is arranged on the inner wall of the duct metal layer, an duct heat insulation interlayer is arranged on the side of the duct sound absorbing layer away from the duct metal layer, a silencer mesh is arranged in the inner cavity of the duct heat insulation interlayer, and a silencer heat insulation valve is arranged on the outer wall of the duct metal layer.

[0006] Preferably, the silencer and heat-insulating valve includes a valve blade shaft, the bottom end of the valve blade shaft is rotatably mounted on the inner bottom of the ventilation pipe, the top end of the valve blade shaft is rotatably mounted on the inner top of the ventilation pipe, and the top end of the valve blade shaft passes through the ventilation pipe and is connected to a valve actuator.

[0007] Preferably, it further comprises a valve body, wherein the valve body is fixedly embedded on the inner wall of the ventilation pipe, and the valve blade shaft is rotatably connected to the valve body.

[0008] Preferably, an air duct connecting flange is provided on the outer wall of the ventilation duct, and the valve body is conductively connected to the air duct connecting flange.

[0009] Preferably, a ventilation plane is reserved between the inner lining wall of the silencer mesh plate and the inner wall of the ventilation pipe, and the size of the valve body is the nominal size plus a filling layer thickness of 40 mm.

[0010] Preferably, it also includes a U-shaped clip, which is fixedly connected to the inside of the ventilation duct, and the air duct sound absorbing layer, the sound-absorbing mesh plate and the air duct thermal insulation interlayer are all fixed to the inner cavity of the ventilation duct through the U-shaped clip.

[0011] Preferably, the material of the air duct sound-absorbing layer is set to be made of formaldehyde-free sound-absorbing and heat-insulating fiber, and the material of the air duct heat-insulating interlayer is set to be made of flame-retardant polyethylene foam plastic.

[0012] Preferably, a corrosion-resistant coating is provided on the outer wall of the metal layer of the air duct, and the corrosion-resistant coating is configured as a polyurethane coating.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model arranges an air duct sound-absorbing layer inside the ventilation duct, and uses it in conjunction with the air duct thermal insulation interlayer. The main function of the air duct sound-absorbing layer is to effectively absorb various noises in the airflow through its material characteristics. This design can greatly reduce the noise generated by the operation of the HVAC equipment and improve the quietness and comfort of the working and living environment. The air duct thermal insulation interlayer can not only reduce the transmission of sound through the pipe, but also further reduce the noise. The air duct sound-absorbing layer and the air duct thermal insulation interlayer are used in conjunction to achieve multiple effects such as noise reduction, heat preservation, energy saving and environmental protection. This comprehensive design makes the ventilation duct silencer more superior in performance and effect. The utility model no longer needs to cover the outer wall of the ventilation duct with insulation material for construction. It can be installed in place at the construction site at one time, which can greatly reduce the construction cost and construction difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the valve blade of the utility model;

[0017] Figure 3 This is a schematic diagram of the silencer and heat preservation valve of the utility model and its application connection.

[0018] In the figure: 1. ventilation duct; 101. air duct metal layer; 102. air duct sound-absorbing layer; 103. air duct thermal insulation interlayer; 2. silencer mesh plate; 3. silencer thermal insulation valve; 301. valve blade shaft; 302. valve actuator; 303. valve body; 4. U-shaped clip; 5. air duct connecting flange; 6. valve blade. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 , the utility model provides a technical solution:

[0021] A ventilation duct silencer comprises a ventilation duct 1, the ventilation duct 1 comprises a duct metal layer 101, a duct sound absorbing layer 102 is arranged on the inner wall of the duct metal layer 101, a duct heat insulation interlayer 103 is arranged on the side of the duct sound absorbing layer 102 away from the duct metal layer 101, a sound absorbing mesh plate 2 is arranged in the inner cavity of the duct heat insulation interlayer 103, and a sound absorbing heat insulation valve 3 is arranged on the outer wall of the duct metal layer 101. The utility model arranges the duct sound absorbing layer 102 inside the ventilation duct 1 and cooperates with the duct heat insulation interlayer 103. The main function of the duct sound absorbing layer 102 is to effectively absorb the sound in the airflow through its material characteristics. Various noises, this design can greatly reduce the noise generated by the operation of HVAC equipment, improve the quietness and comfort of the working and living environment, the air duct insulation interlayer 103 can not only reduce the transmission of sound through the pipe, but also further reduce the noise, the air duct sound absorbing layer 102 and the air duct insulation interlayer 103 are used in coordination, which can achieve multiple effects such as noise reduction, heat preservation, energy saving and environmental protection. This comprehensive design makes the ventilation pipeline silencer more superior in performance and effect. The utility model does not need to cover the outer wall of the ventilation pipe 1 with insulation materials, and can be installed in place at the construction site at one time, which can greatly reduce the construction cost and construction difficulty;

[0022] The muffler and heat preservation valve 3 includes a valve blade shaft 301, the bottom end of the valve blade shaft 301 is rotatably mounted on the inner bottom of the ventilation pipe 1, the top end of the valve blade shaft 301 is rotatably mounted on the inner top of the ventilation pipe 1, and the top end of the valve blade shaft 301 penetrates the ventilation pipe 1 and is connected to a valve actuator 302, and also includes a valve body 303, the valve body 303 is fixedly embedded on the inner wall of the ventilation pipe 1, and the valve blade shaft 301 is rotatably connected to the valve body 303;

[0023] According to the principle and process of the silencer and heat preservation valve 3, two 2-meter-long heat preservation air ducts of 300*200 (consistent with the air outlet pipe of the air conditioner) are designed and manufactured, and the silencer and heat preservation valve 3 is installed in the middle; the noise is first measured at a distance of 1 meter with a noise meter at an angle of 45 degrees from the air outlet air duct end of the air conditioner, and the noise is 52dB, and the wind speed at the outlet end is measured with an anemometer to be 5.6m / s, the air outlet temperature is 11.2℃, and the ambient outside temperature is 28.5 degrees; the silencer and heat preservation valve 3 air duct is connected to the air outlet end of the air conditioner, and the valve is closed for 10 minutes, and the outer frame of the silencer and heat preservation valve 3 is observed, and there is no condensation phenomenon. When the valve body is touched by hand, there is no obvious cool feeling; the silencer and heat preservation valve 3 is opened, and the end wind speed is measured by the same method to be 5.5m / s, the temperature is 11.2℃, the noise is 49dB, and there is no condensation phenomenon on the inner wall of the air duct; after 30 minutes, the surface of the silencer and heat preservation valve 3 is touched, and there is no obvious cool feeling and the surface is dry. The overall test results show that the temperature loss is 0, the air volume loss per meter is 0.4%, and the sound elimination rate is 1.5% per meter;

[0024] An air duct connection flange 5 is arranged on the outer wall of the ventilation pipe 1, the valve body 303 is connected to the air duct connection flange 5, a ventilation plane is reserved between the inner lining wall of the silencer mesh plate 2 and the inner wall of the ventilation pipe 1, the size of the valve body 303 is based on the nominal size plus a 40mm filling layer thickness, the silencer and heat preservation valve 3 (the silencer and heat preservation pipeline has the same structure as the valve body, which will not be described in detail) is mainly composed of the valve body 303 as the main structural body, and a U-shaped clip 4 is used to fix the air duct sound absorption layer 102 and the air duct heat preservation interlayer 103 material lining, with a thickness of 20mm. When making the silencer and heat preservation valve 3, the size of the valve body 303 needs to be based on the nominal size plus a 40mm filling layer thickness to ensure that the ventilation cross-sectional area is met;

[0025] It also includes a U-shaped clip 4, which is fixedly connected to the inside of the ventilation pipe 1, and the air duct sound absorbing layer 102, the silencer mesh plate 2 and the air duct thermal insulation interlayer 103 are all fixed to the inner cavity of the ventilation pipe 1 through the U-shaped clip 4. The silencer thermal insulation valve 3 needs to be used in conjunction with the thermal insulation silencer air duct to exert obvious insulation and noise reduction effects. The valve body 303 is connected to the air duct connection flange 5. The inner lining wall of the silencer mesh plate 2 and the inner wall of the ventilation pipe 1 form a ventilation plane, forming a sufficiently long silencer channel and a sufficiently large sound absorption area, so that the noise is gradually attenuated in the pipeline and the valve body. In addition, the effect of the lining silencer fiber isolates the valve body 303 and the pipe body from the airflow, and will not vibrate due to the wind speed. The gas will not diffuse the temperature outward to produce condensation water droplets, thereby enhancing the insulation effect and other hazards;

[0026] The material of the air duct sound-absorbing layer 102 is set to be made of formaldehyde-free sound-absorbing and thermal insulation fiber. The formaldehyde-free sound-absorbing and thermal insulation fiber does not contain formaldehyde and other harmful organic volatiles, so it will not release harmful substances during use, is harmless to the indoor environment and human health, and meets modern environmental protection requirements. This fiber material has good sound absorption performance, can effectively absorb and reduce noise in the ventilation system, improve the quietness of the indoor environment, and enhance the comfort of living and working. The formaldehyde-free sound-absorbing and thermal insulation fiber not only has a sound absorption function, but also has excellent thermal insulation performance, which helps to maintain the stability of indoor temperature, reduce energy loss, and improve energy utilization efficiency. The air duct insulation The material of the interlayer 103 is set to be made of flame-retardant polyethylene foam plastic. Flame-retardant polyethylene foam plastic is a closed-cell structure material with good thermal insulation performance. It can effectively reduce energy loss and maintain the temperature in the ventilation duct stable, thereby improving the energy efficiency of the system. In addition to thermal insulation, flame-retardant polyethylene foam plastic also has a certain sound absorption and noise reduction ability. It can absorb noise in the pipeline, reduce noise propagation, and improve the quietness of the indoor environment. Flame-retardant polyethylene foam plastic is light in texture, easy to process, and can be cut arbitrarily to fit the equipment, which makes it more convenient during installation and maintenance, and reduces construction difficulty and cost;

[0027] A corrosion-resistant coating is provided on the outer wall of the metal layer 101 of the air duct, and the corrosion-resistant coating is configured as a polyurethane coating. The polyurethane coating has extremely high chemical stability and will not be corroded by many common chemical substances such as acids and alkalis, thereby ensuring the long-term anti-corrosion performance of the ventilation duct 1. The polyurethane coating has extremely high toughness and wear resistance. Even under the condition of long-term heavy pressure and friction, it is not easily damaged, thereby effectively protecting the metal layer from corrosion in the external environment. In addition, in addition to the anti-corrosion function, the polyurethane coating also has beautiful decorative properties, which can enhance the overall appearance of the ventilation duct 1. As the corrosion-resistant coating on the outer wall of the metal layer of the air duct in the silencer of the ventilation duct 1, the polyurethane coating has multiple advantages such as excellent corrosion resistance, tough wear resistance, excellent adhesion, good waterproofness, high and low temperature resistance, and beautiful decorative properties. These characteristics enable the polyurethane coating to play an important role in protecting the metal layer 101 of the air duct from corrosion in the external environment and extending the service life of the ventilation duct 1.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ventilation pipe silencer, characterized in that: include: Ventilation pipe (1); The ventilation duct (1) comprises a duct metal layer (101), a duct sound absorbing layer (102) is arranged on the inner wall of the duct metal layer (101), and a duct heat insulation interlayer (103) is arranged on the side of the duct sound absorbing layer (102) away from the duct metal layer (101); The inner cavity of the air duct heat-insulating interlayer (103) is provided with a sound-absorbing mesh plate (2); A sound-absorbing and heat-insulating valve (3) is arranged on the outer wall of the air duct metal layer (101).

2. A ventilation pipe silencer according to claim 1, characterized in that: The silencer and heat-insulating valve (3) comprises a valve blade rotating shaft (301), the bottom end of the valve blade rotating shaft (301) is rotatably mounted on the inner bottom of the ventilation pipe (1), the top end of the valve blade rotating shaft (301) is rotatably mounted on the inner top of the ventilation pipe (1), and the top end of the valve blade rotating shaft (301) passes through the ventilation pipe (1) and is connected to a valve actuator (302).

3. A ventilation pipe silencer according to claim 2, characterized in that: It also comprises a valve body (303), wherein the valve body (303) is fixedly embedded on the inner wall of the ventilation pipe (1), and the valve blade rotating shaft (301) is rotatably connected to the valve body (303).

4. A ventilation pipe silencer according to claim 3, characterized in that: An air duct connecting flange (5) is provided on the outer wall of the ventilation duct (1), and the valve body (303) is conductively connected to the air duct connecting flange (5).

5. A ventilation pipe silencer according to claim 4, characterized in that: A ventilation plane is reserved between the inner lining wall of the silencer mesh plate (2) and the inner wall of the ventilation pipe (1), and the size of the valve body (303) is the nominal size plus a filling layer thickness of 40 mm.

6. A ventilation pipe silencer according to claim 1, characterized in that: It also comprises a U-shaped clip (4), wherein the U-shaped clip (4) is fixedly connected to the inside of the ventilation pipe (1), and the air duct sound absorbing layer (102), the sound-absorbing mesh plate (2) and the air duct heat-insulating interlayer (103) are all fixed to the inner cavity of the ventilation pipe (1) via the U-shaped clip (4).

7. A ventilation pipe silencer according to claim 1, characterized in that: The material of the air duct sound absorbing layer (102) is set to be made of formaldehyde-free sound absorbing and heat-insulating fiber, and the material of the air duct heat-insulating interlayer (103) is set to be made of flame-retardant polyethylene foam plastic.

8. A ventilation pipe silencer according to claim 1, characterized in that: A corrosion-resistant coating is provided on the outer wall of the air duct metal layer (101), and the corrosion-resistant coating is configured as a polyurethane coating.

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