Movable energy-saving air inlet and outlet noise elimination system

Abstract

The utility model discloses a movable energy-saving air inlet and outlet noise elimination system which comprises an air inlet and outlet, a plurality of fixed noise elimination units and movable noise elimination units are arranged in the air inlet and outlet, the fixed noise elimination units are fixed in the air inlet and outlet, and the movable noise elimination units move front and back in the air direction in the air inlet and outlet along a track through a guide rail assembly. The track of the movable silencing unit comprises a noise reduction position between the fixed silencing units and an energy saving position in front of and / or behind the fixed silencing units. The noise reduction device has the beneficial effects that the noise reduction unit is arranged to be the fixed channel part and the movable channel part, the movable channel part is adjusted in real time according to the actual requirements of system operation and the difference of the noise reduction requirements of the external environment, the noise reduction requirements are met, meanwhile, energy loss caused by wind resistance can be effectively reduced, and the noise reduction effect is improved. Remarkable energy-saving benefits are achieved, and the noise reduction requirements of various different environments such as day and night changes, seasonal differences and load fluctuation of equipment needing noise reduction can be flexibly met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of noise reduction and energy saving, and particularly relates to a movable energy-saving air inlet and outlet silencing system. BACKGROUND

[0002] There is an air inlet and outlet silencing device in the prior art, which is installed outside a device with noise reduction and ventilation requirements, and is commonly in an array type, a matrix type, a sheet type, a sinusoidal wave type or a rhombus type. The existing problems are as follows: the existing air inlet and outlet silencing device is fixedly installed, and in the case of fixed ventilation volume, fixed wind resistance is generated, and different noise reduction requirements cannot be flexibly adapted, thereby energy loss is generated. CONTENT OF THE UTILITY MODEL

[0003] The application aims to provide a movable energy-saving air inlet and outlet silencing system, and solve the problem that the existing silencing device cannot flexibly adapt to different noise reduction requirements.

[0004] The application aims to achieve the above-mentioned purpose through the following technical scheme.

[0005] The movable energy-saving air inlet and outlet silencing system comprises an air inlet and outlet, and a plurality of fixed silencing units and movable silencing units are arranged in the air inlet and outlet. The fixed silencing units are fixed in the air inlet and outlet, and the movable silencing units move back and forth along a track in the air inlet and outlet in the direction of the wind through a guide rail assembly. The track of the movable silencing units comprises a noise reduction position between the fixed silencing units and an energy-saving position in front of and / or behind the fixed silencing units.

[0006] Further, the fixed silencing units and the movable silencing units are arranged in an alternating vertical column structure or a horizontal column structure.

[0007] Further, the noise reduction position of the movable silencing units is a front position of the track, and the energy-saving position of the movable silencing units is a rear position of the track.

[0008] Further, the movable silencing units move back and forth along a straight line track parallel to the direction of the wind.

[0009] Further, the movable silencing units move back and forth along a broken line track or an arc line track.

[0010] Further, the rear position of the track of the movable silencing units is located directly behind the fixed silencing units.

[0011] Further, the rear position of the track of the movable silencing units is located directly behind the vertical structure.

[0012] Further, the air inlet and outlet comprises an upper air inlet and outlet and a lower air inlet and outlet, the upper air inlet and outlet is provided with a plurality of fixed noise reduction units, and the lower air inlet and outlet is provided with a plurality of fixed noise reduction units and mobile noise reduction units.

[0013] Further, the air inlet and outlet comprises an upper air inlet and outlet and a lower air inlet and outlet, the upper air inlet and outlet is provided with a plurality of fixed noise reduction units, and the lower air inlet and outlet is provided with a plurality of fixed noise reduction units and mobile noise reduction units.

[0014] Further, the air inlet and outlet comprises an upper air inlet and outlet and a lower air inlet and outlet, the upper air inlet and outlet is provided with a plurality of fixed noise reduction units, and the lower air inlet and outlet is provided with a plurality of fixed noise reduction units and mobile noise reduction units.

[0015] Further, the air inlet and outlet comprises an upper air inlet and outlet and a lower air inlet and outlet, the upper air inlet and outlet is provided with a plurality of fixed noise reduction units, and the lower air inlet and outlet is provided with a plurality of fixed noise reduction units and mobile noise reduction units.

[0016] Further, the air inlet and outlet comprises an upper air inlet and outlet and a lower air inlet and outlet, the upper air inlet and outlet is provided with a plurality of fixed noise reduction units, and the lower air inlet and outlet is provided with a plurality of fixed noise reduction units and mobile noise reduction units.

[0017] The beneficial effects of the present application are: by setting the noise reduction units (which can be array type, matrix type, sheet type, sine wave type or rhombus type) in the air inlet and outlet noise reduction device as fixed channel part and movable channel part, according to the actual demand of system operation and the different noise reduction demand of external environment, the movable channel part is adjusted in real time (this working condition is called "energy saving working condition") to meet the noise reduction demand and effectively reduce the energy loss caused by wind resistance, realize significant energy saving benefit, and flexibly cope with the noise reduction demand of different environments such as day and night changes, seasonal differences and load fluctuations of noise reduction equipment.

[0018] The foregoing main scheme of the present application and each further selected scheme can be freely combined to form multiple schemes, which are all the schemes that can be adopted and claimed by the present application; and the present application can also be freely combined between (each non-conflicting selection) and between other selections. Those skilled in the art can understand that there are many combinations according to the existing technology and common knowledge after understanding the schemes of the present application, which are all the technical schemes to be protected by the present application, and are not listed here. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of embodiments 1 and 2 of the present application.

[0020] Figure 2 is a sectional view of the fixed noise reduction unit of embodiments 1 and 2 of the present application.

[0021] Figure 3 is a sectional view of the mobile noise reduction unit of embodiment 1 of the present application.

[0022] Figure 4 is the cross-sectional layout of the mobile muffling unit of Embodiment 2 of the present application.

[0023] Figure 5 is the structural schematic diagram of Embodiment 3 of the present application.

[0024] Figure 6 is the cross-sectional layout of the fixed muffling unit of Embodiment 3 of the present application.

[0025] Figure 7 is the structural schematic diagram of Embodiment 4 of the present application.

[0026] Figure 8 is the cross-sectional layout of the fixed muffling unit of Embodiment 4 of the present application.

[0027] Figure 9 is the cross-sectional layout of the mobile muffling unit of Embodiment 4 of the present application.

[0028] Figure 10 is the structural schematic diagram of the fixed muffling unit of the present application.

[0029] Figure 11 is the structural schematic diagram of the mobile muffling unit of the present application.

[0030] In the figure: 1 - air inlet and outlet, 2 - fixed muffling unit, 3 - mobile muffling unit, 4 - guide rail assembly, 5 - upper air inlet and outlet, 6 - lower air inlet and outlet, 7 - vertical structure, 8 - horizontal structure, 9 - ventilation cooling tower, 10 - embedded angle steel, 11 - connecting plate, 12 - mounting angle steel, 13 - mounting straight pipe, 14 - muffling element, 15 - mounting elbow pipe, 16 - guide wheel, 17 - guide rail, 18 - limiting piece, 19 - driver. DETAILED DESCRIPTION

[0031] The following non-limiting examples are intended to illustrate the present application.

[0032] Example 0

[0033] Reference Figures 1-11 As shown in the figure, a movable energy-saving air inlet and outlet muffling system includes an air inlet and outlet 1, a fixed muffling unit 2, a mobile muffling unit 3, and a guide rail assembly 4.

[0034] The air inlet and outlet 1 is used for air inlet or air outlet during ventilation. The air inlet and outlet 1 can be the air inlet of a ventilation cooling tower 9, or the air inlet of other ventilation systems that need to reduce noise (natural ventilation cooling tower air inlet, subway ventilation air inlet). A plurality of fixed muffling units 2 and mobile muffling units 3 are arranged in the air inlet and outlet 1. The fixed muffling units 2 are fixed in the air inlet and outlet 1, serving as continuous noise reduction units.

[0035] The mobile silencing unit 3 moves along the track in the air direction in the air inlet and outlet 1 through the guide rail assembly 4, and the track of the mobile silencing unit 3 includes a noise reduction position between the fixed silencing units 2 and an energy saving position in front of and / or behind the fixed silencing units 2. When the mobile silencing unit 3 is moved to the noise reduction position between the fixed silencing units 2, the mobile silencing unit 3 performs a noise reduction function, which is suitable for a period of time with high noise reduction requirements, but the air resistance is large. When the mobile silencing unit 3 is moved to the energy saving position in front of and / or behind the fixed silencing units 2, the noise reduction function of the mobile silencing unit 3 is reduced or disappears, and the air duct area is expanded to reduce the air resistance, which is suitable for a period of time with low noise reduction requirements, and realizes the energy saving effect of reducing power.

[0036] According to the different seasons, day and night, or load, when the working condition that can reduce the noise reduction amount appears, the mobile silencing unit is moved to realize the energy saving effect of reducing the energy loss caused by air resistance while meeting the noise reduction demand. The mobile silencing unit can move in the same or opposite direction of the gas flow, and after moving, the gas flow speed between the silencers is reduced, the channel is lengthened, the gas resistance loss is reduced, and the noise reduction effect is reduced.

[0037] When the noise reduction requirement is not high, the mobile silencing unit can be moved out as needed. Of course, the more it is moved out, the smaller the noise reduction amount and the smaller the ventilation resistance loss. It can be moved to the appropriate position according to the external noise reduction demand. When the noise emission limit value requirement of the facility in the noise reduction area is high under the full load operation condition at night, the mobile silencing unit is moved back.

[0038] The fixed silencing units 2 and the mobile silencing units 3 are arranged in vertical or horizontal structures, and the vertical structure is preferably arranged in a single horizontal direction, which is convenient for installation and operation of the silencing units, and has good energy saving effect. The vertical arrangement is convenient for support and guidance. The horizontal structure is preferably arranged in a single vertical direction. Similarly, the alternating arrangement can also be in other quantities.

[0039] The noise reduction position of the mobile silencing unit 3 is the front position of the track, and the energy saving position of the mobile silencing unit 3 is the rear position of the track, that is, the front limit position of the mobile silencing unit 3 is between the fixed silencing units 2, and the rear limit position is moved to the rear of the fixed silencing units 2, so as to make full use of the space inside the ventilation cooling tower 9 and avoid the extension of the air inlet outward. Similarly, the noise reduction position of the mobile silencing unit 3 can also be the rear position of the track, and the energy saving position of the mobile silencing unit 3 can be the front position of the track. The noise reduction position of the mobile silencing unit 3 can also be the middle position of the track, and the energy saving position of the mobile silencing unit 3 can be the front position and the rear position of the track.

[0040] The energy-saving position of the mobile noise reduction unit 3 is the position where it is moved to the front and / or rear of the fixed noise reduction unit 2, and the relative distance between the front and rear includes two forms of far and near. If the mobile noise reduction unit 3 is moved to a closer distance, the mobile noise reduction unit 3 still has the effect of noise reduction and resistance increase. If the mobile noise reduction unit 3 is moved to a farther distance, the effect of noise reduction and resistance increase of the mobile noise reduction unit 3 is greatly reduced. The specific distance can be flexibly adjusted according to the on-site demand.

[0041] The system also includes a vertical structure 7 and a horizontal structure 8 as the main body of the building. The vertical structure 7 can be a column or a wall, and the horizontal structure 8 can be a beam or a floor. The vertical structure 7 and the horizontal structure 8 form a plurality of arrayed air inlet and outlet openings 1.

[0042] The fixed noise reduction unit 2 and the mobile noise reduction unit 3 are arrayed, matrixed, sheeted, sinusoidally waved, or rhombically arranged.

[0043] The fixed noise reduction unit 2 includes mounting straight pipes 13 and noise reduction elements 14. The noise reduction elements 14 are connected between the mounting straight pipes 13. The mounting straight pipes 13 are connected with mounting angle steels 12 through bolts. The mounting angle steels 12 are welded with connecting plates 11. The connecting plates 11 are welded with pre-buried angle steels 10 on the horizontal structure 8, so as to realize the fixed installation of the four end corners of the fixed noise reduction unit 2.

[0044] The mobile noise reduction unit 3 includes mounting folded pipes 15 and noise reduction elements 14. The mounting folded pipes 15 are preferably U-shaped structures. The noise reduction elements 14 are connected between the middle segments of the mounting folded pipes 15. The folded segments of the mounting folded pipes 15 are connected with guide wheels 16. The guide wheels 16 are movably arranged on guide rails 17 on the horizontal structure 8. The mounting folded pipes 15 are provided with drives 19 (such as motors) for driving the guide wheels 16. The guide wheels 16 are driven to walk by the drives 19, so as to realize the self-walking function of the mobile noise reduction unit 3. Limiting pieces 18 are welded at the front and rear limit positions of the guide rails 17. The limiting pieces 18 block the walking of the mobile noise reduction unit 3, so as to avoid the mobile noise reduction unit 3 from falling out of the guide rails 17.

[0045] Embodiment 1

[0046] Reference Figure 1 , Figure 2 and Figure 3 As shown in the drawings, a movable energy-saving air inlet and outlet noise reduction system is provided. The mobile noise reduction unit 3 moves along a straight trajectory parallel to the wind direction. When the mobile noise reduction unit 3 moves to the front position of the trajectory, it performs the noise reduction function. When the mobile noise reduction unit 3 moves to the rear position of the trajectory, it is located opposite to the rear of the adjacent fixed noise reduction units 2, and also has a certain noise reduction effect, while expanding the air duct to reduce resistance and save energy.

[0047] The other embodiments are the same as Embodiment 0.

[0048] Take the silencer system with a total length of 3 meters and a flow ratio of 0.5 as an example: under strict operating conditions, the total pressure loss coefficient of the silencer system is 3.7; after the mobile silencer unit is removed, it is equivalent to two small silencer systems with a length of 3 meters and a flow ratio of 0.75. The total pressure loss coefficient of each small silencer system is 1.2. After removal, the total total pressure loss coefficient is 1.2×2=2.4; 1-2.4 / 3.7=35%, so energy saving is expected to be more than 35%.

[0049] Example 2

[0050] refer to Figure 1 、 Figure 2 and Figure 4 As shown, a movable energy-saving inlet and outlet air silencer system is shown, in which the mobile silencer unit 3 moves forward and backward along a broken line trajectory or an arc trajectory. The broken line trajectory or the arc trajectory can achieve the left and right position offset of the mobile silencer unit 3. The mobile silencer unit 3 is offset to the rear of the fixed silencer unit 2 or the vertical structure 7, which can further expand the air duct, reduce wind resistance, and improve the energy-saving effect.

[0051] In this embodiment, the rear position of the trajectory of the mobile silencer unit 3 is located directly behind the fixed silencer unit 2, so the mobile silencer unit 3 moves to the front position of the trajectory, that is, the noise reduction position, to perform noise reduction. The mobile silencer unit 3 moves to the rear position of the trajectory, that is, the energy-saving position. This position is directly behind the fixed silencer unit 2 instead of between them, further optimizing the front and rear through-area of ​​the air duct to further reduce wind resistance, and has a better energy-saving effect than Example 1.

[0052] Other details are the same as in Example 0.

[0053] Example 3

[0054] refer to Figure 5 and Figure 6 As shown, a movable energy-saving inlet and outlet air silencer system is shown, in which the mobile silencer unit 3 moves forward and backward along a broken line trajectory or an arc trajectory. The broken line trajectory or the arc trajectory can achieve the left and right position offset of the mobile silencer unit 3. The mobile silencer unit 3 is offset to the rear of the fixed silencer unit 2 or the vertical structure 7, which can further expand the air duct, reduce wind resistance, and improve the energy-saving effect.

[0055] The trajectory rear position of the mobile muffling unit 3 of the embodiment is located directly behind the vertical structure 7, so that the mobile muffling unit 3 moves to the trajectory front position, i.e. the noise reduction position, to perform the noise reduction function, and the mobile muffling unit 3 moves to the trajectory rear position, i.e. the energy saving position, which is directly opposite the rear of the vertical structure 7 instead of being in the air duct of the air inlet and outlet 1. Since the muffling unit is directly reduced in the air duct instead of being hidden behind the fixed muffling unit 2, this form further optimizes the front-to-back through area of the air duct to further reduce the air resistance, and has a more excellent energy saving effect compared to embodiment 2.

[0056] The other is the same as embodiment 0.

[0057] Embodiment 4

[0058] Referring to Figure 7 , Figure 8 and Figure 9 , a movable energy-saving type air inlet and outlet muffling system is shown, the air inlet and outlet 1 includes an upper air inlet and outlet 5 and a lower air inlet and outlet 6, a plurality of fixed muffling units 2 are arranged in the upper air inlet and outlet 5, and a plurality of fixed muffling units 2 and a movable muffling unit 3 are arranged in the lower air inlet and outlet 6, i.e. only the movable muffling unit 3 is arranged in the lower air inlet and outlet 6, and the movable muffling unit 3 is not arranged in the upper air inlet and outlet 5. This form can save the cost of installation and arrangement, but due to the balancing effect of air pressure, the energy saving effect obtained is more excellent. The upper air inlet and outlet 5 and the lower air inlet and outlet 6 can be single-layer, double-layer, three-layer or even more layers.

[0059] The other is the same as embodiment 0.

[0060] Taking the total length of the muffling system as 3 meters and the flow ratio as 0.5 as an example, the upper air inlet and outlet 5 and the lower air inlet and outlet 6 are both single-layer: the air volume is 326×10 4 m 3 / h, the total area of the air inlet and outlet muffler is 184m 2 ; under strict operating conditions, the total pressure loss coefficient of the muffling system is 3.7; only the lower air inlet and outlet is made partially movable, and is moved to a position where more is retreated, and half of the muffling units are removed, which is equivalent to a muffler with a length of 3 meters and a flow ratio of 0.75, the total pressure loss coefficient of the lower muffling system is 1.2, and the total pressure loss coefficient of the upper muffling system after removal is 3.7, and the total pressure loss coefficient of the muffling system is 1.2 through calculation.

[0061] Using the formula ξ = △pt / 0.5 / ρ1 / (v f )2, the total pressure loss △pt under fixed conditions can be calculated as 0.5×3.7×1.29×(3260000 / 3600 / 184)2=57.80pa. Wherein: ξ is the total pressure loss coefficient; △pt is the total pressure loss, pa; ρ1 is the air density upstream of the muffler, kg / m3 In this case, we take 1.29kg / m 3 ;v f is the headwind speed, m / s.

[0062] When only the lower layer is made partially movable and moves farther back, the air flow is redistributed into upper and lower layer flows, and ultimately the △pt balance of the upper and lower layers is equal.

[0063] Through trial and error calculation, it can be concluded that the upper air flow rate is 1182894.75m 3 / h, the air flow rate of the lower layer is 2077105.25m 3 / h, the total air flow of the two floors is still 3260000m 3 / h. The total area of ​​the windward silencer on each floor is 92m 2 , and then calculate the total pressure loss of the upper and lower layers respectively: upper layer △pt = 0.5×3.7×1.29×(1182894.75 / 3600 / 92)2 = 30.44pa; lower layer △pt = 0.5×1.2×1.29×(2077105.25 / 3600 / 92)2 = 30.44pa. Through calculation, the resistance of the two layers is the same, so the calculated data is accurate.

[0064] Therefore, when only the lower layer is made partially movable and moved farther back, the energy loss caused by wind resistance saved is: (57.80-30.44) / 57.80=47.33%.

[0065] The aforementioned basic examples and their further selected examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed for protection in this application. In this application, each selected example can be arbitrarily combined with any other basic examples and selected examples.

[0066] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A mobile energy-saving type air inlet and outlet sound-attenuating system comprising an air inlet and outlet (1), characterized in that: The air inlet and outlet (1) is provided with a plurality of fixed noise reduction units (2) and mobile noise reduction units (3), the fixed noise reduction units (2) are fixed in the air inlet and outlet (1), the mobile noise reduction units (3) move along the track in the air inlet and outlet (1) in front and back of the wind direction, the track of the mobile noise reduction units (3) includes a noise reduction position between the fixed noise reduction units (2) and an energy saving position in front and / or back of the fixed noise reduction units (2).

2. The mobile energy-saving air intake and exhaust sound attenuation system of claim 1, wherein: The fixed noise reduction units (2) and the mobile noise reduction units (3) are arranged in vertical columns or horizontal rows alternately; the noise reduction position of the mobile noise reduction units (3) is the front position of the track, and the energy saving position of the mobile noise reduction units (3) is the rear position of the track.

3. The mobile energy-efficient intake and exhaust sound attenuation system of claim 1, wherein: The mobile noise reduction units (3) move along the straight track parallel to the wind direction.

4. The mobile energy-efficient intake and exhaust sound attenuation system of claim 1, wherein: The mobile noise reduction units (3) move along the broken line track or the arc line track.

5. The mobile energy-efficient intake and exhaust sound attenuation system of claim 4, wherein: The rear position of the track of the mobile noise reduction units (3) is located directly behind the fixed noise reduction units (2).

6. The mobile energy-efficient intake and exhaust sound attenuation system of claim 4, wherein: The rear position of the track of the mobile noise reduction units (3) is located directly behind the vertical structure (7).

7. The mobile energy-saving air intake and exhaust sound-attenuating system according to any one of claims 1, 3-6, characterized in that: The air inlet and outlet (1) includes an upper air inlet and outlet (5) and a lower air inlet and outlet (6), the upper air inlet and outlet (5) is provided with a plurality of fixed noise reduction units (2), and the lower air inlet and outlet (6) is provided with a plurality of fixed noise reduction units (2) and mobile noise reduction units (3).

8. The mobile energy-efficient intake and exhaust sound attenuation system of claim 1, wherein: The vertical structure (7) and the horizontal structure (8) are further included, and the air inlet and outlet (1) is formed between the vertical structure (7) and the horizontal structure (8).

9. The mobile energy-efficient inlet and outlet sound attenuation system of claim 1, wherein: The fixed noise reduction units (2) include mounting straight pipes (13), the mounting straight pipes (13) are connected with noise reduction elements (14), the mounting straight pipes (13) are connected with mounting angle steels (12), the mounting angle steels (12) are connected with connecting plates (11), and the connecting plates (11) are connected with embedded angle steels (10) on the air inlet and outlet (1).

10. The mobile energy-saving air intake and exhaust sound attenuation system of claim 1 or 9, wherein: The mobile noise reduction units (3) include mounting bent pipes (15), the mounting bent pipes (15) are connected with noise reduction elements (14), the bent segments of the mounting bent pipes (15) are connected with guide wheels (16), the guide wheels (16) are movably arranged on guide rails (17) on the air inlet and outlet (1), the guide wheels (16) are connected with drives (19), and the front and back limit positions of the guide rails (17) are provided with limiters (18).

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