A noise reduction device

Abstract

The present invention discloses a noise reduction device, comprising: a support frame, which includes a top support frame and a peripheral support frame, wherein the peripheral support frame includes a plurality of peripheral cross beams and a plurality of peripheral columns, the peripheral columns are fixed on a foundation plane, the peripheral cross beams are cross-connected with the peripheral columns, and the peripheral cross beams and / or the peripheral columns are connected with the top support frame; a sound absorption and insulation component; a vibration prevention component, including a first vibration prevention member and a second vibration prevention member, the first vibration prevention member is disposed at the cross connection of the peripheral cross beam and the peripheral column at an interval therebetween, and the second vibration prevention member is disposed at the cross connection of the top support frame and the peripheral support frame at an interval therebetween. The first vibration prevention member can prevent the peripheral column from transmitting vibration to the peripheral cross beam, and the second vibration prevention member can prevent the peripheral support frame from transmitting vibration to the top support frame and the sound absorption and insulation component, thereby avoiding the occurrence of secondary noise caused by vibration.

Description

Technical Field

[0001] The present invention relates to the technical field of noise pollution protection, and particularly to a noise reduction device. Background Art

[0002] With the increasing maturity of UHV power transmission technology, UHV AC and DC projects in China have entered a new stage of large-scale construction. While the UHV project is being constructed, China has also made significant breakthroughs in the core technologies and equipment localization of UHV power transmission and transformation. However, there are still short boards to be improved in aspects such as the environmental coordination of electrical equipment. In particular, environmental problems represented by audible noise are bringing non-negligible environmental pressure to the power grid. Due to a series of reasons such as manufacturing process differences, equipment aging, and long-term operation, the noise pollution problem of UHV substation equipment is becoming increasingly prominent. Especially for UHV shunt reactors, their installation locations are generally close to the factory boundary, and the sound pressure level is as high as over 70 decibels. Generally, a sound insulation enclosure method is required for noise control. The sound insulation enclosure includes sound insulation boards, sound absorption devices, etc. The sound insulation boards and sound absorption devices can block the noise generated by the reactor, but they cannot block the reactor from transmitting its vibration in the working state to the sound insulation enclosure, resulting in the generation of secondary noise due to the vibration of the sound insulation enclosure, making the noise reduction effect on the reactor limited. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the vibration of the sound insulation enclosure generates secondary noise, resulting in a limited noise reduction effect on the reactor, and thus provide a noise reduction device.

[0004] A noise reduction device includes:

[0005] A support frame, which includes a top support frame and a peripheral support frame. The top support frame and the peripheral support frame enclose and cover the outside of the equipment to be noise-reduced. The peripheral support frame includes a plurality of peripheral cross beams and a plurality of peripheral columns. The peripheral columns are fixed on the foundation plane, the peripheral cross beams are cross-connected with the peripheral columns, and the peripheral cross beams and / or the peripheral columns are connected to the top support frame;

[0006] A sound absorption and insulation component, fixed on the periphery of the support frame;

[0007] An anti-vibration component, including a first anti-vibration member and a second anti-vibration member. The first anti-vibration member is arranged at the cross connection of the peripheral cross beam and the peripheral column at an interval therebetween, and the second anti-vibration member is arranged at the cross connection of the top support frame and the peripheral support frame at an interval therebetween.

[0008] Furthermore, the anti-vibration component further includes a third anti-vibration member, and the peripheral cross beam at the bottom is fixed on the foundation plane through the third anti-vibration member.

[0009] Further, the vibration isolation component further includes a host vibration isolator, and the bottom of the equipment to be noise-reduced is fixed on the basic plane through the host vibration isolator.

[0010] Further, the first vibration isolator is an annular rubber vibration isolator, the second vibration isolator is a conical damping rubber vibration isolator, and the third vibration isolator and the host vibration isolator are both multi-layer rubber vibration isolation pads.

[0011] Further, the sound absorption and insulation component includes a sound absorption unit and a sound insulation unit stacked thereon. The sound absorption unit is a porous resistive sound absorption structure or a double-resonance sound absorption structure, and the sound insulation unit is a metal-rubber composite sound insulation structure or a metal sound insulation board.

[0012] Further, the porous resistive sound absorption structure is a pre-oxidized fiber sound absorption felt.

[0013] Further, the double-resonance sound absorption structure is a micro-hole fiber composite sound absorption board.

[0014] Further, the metal-rubber composite sound insulation structure includes a first metal plate, a rubber plate and a second metal plate stacked in sequence.

[0015] Further, the equipment to be noise-reduced is an oil-immersed reactor.

[0016] Further, a through hole allowing the riser of the oil-immersed reactor to pass through is provided on the sound absorption and insulation component covering the top support frame, and the diameter of the through hole is larger than the outer diameter of the riser.

[0017] The technical solution of the present invention has the following advantages:

[0018] 1. A noise reduction device provided by the present invention includes: a support frame, which includes a top support frame and a peripheral support frame. The top support frame and the peripheral support frame are enclosed and covered outside the device to be noise-reduced. The peripheral support frame includes a plurality of peripheral cross beams and a plurality of peripheral columns. The peripheral columns are fixed on the base plane, the peripheral cross beams are cross-connected with the peripheral columns, and the peripheral cross beams and / or the peripheral columns are connected with the top support frame; a sound absorption and insulation component, fixed on the periphery of the support frame; a vibration prevention component, including a first vibration prevention member and a second vibration prevention member. The first vibration prevention member is arranged at the cross connection of the peripheral cross beam and the peripheral column with a space therebetween, and the second vibration prevention member is arranged at the cross connection of the top support frame and the peripheral support frame with a space therebetween. For a noise reduction device with such a structure, by providing a vibration prevention component, the first vibration prevention member can prevent the peripheral column from transmitting vibration to the peripheral cross beam, and the second vibration prevention member can prevent the peripheral support frame from transmitting vibration to the top support frame and the sound absorption and insulation component, thereby avoiding the occurrence of secondary noise caused by vibration and obtaining a better noise reduction effect.

[0019] 2. A noise reduction device provided by the present invention, the vibration prevention component further includes a third vibration prevention member. The peripheral cross beam at the bottom is fixed on the base plane through the third vibration prevention member. For a noise reduction device with such a structure, by providing a third vibration prevention member, the third vibration prevention member can prevent the peripheral cross beam from transmitting vibration to the base plane, thereby avoiding the occurrence of secondary noise caused by vibration and obtaining a better noise reduction effect.

[0020] 3. A noise reduction device provided by the present invention, the vibration prevention component further includes a main machine vibration prevention member. The bottom of the device to be noise-reduced is fixed on the base plane through the main machine vibration prevention member. For a noise reduction device with such a structure, by providing a main machine vibration prevention member, the main machine vibration prevention member can reduce the vibration transmitted by the device to be noise-reduced to the base plane, thereby avoiding the occurrence of secondary noise caused by vibration and obtaining a better noise reduction effect.

[0021] 4. A noise reduction device provided by the present invention, a through hole allowing the riser of the oil-immersed reactor to pass through is provided on the sound absorption and insulation component covering the top support frame, and the diameter of the through hole is larger than the outer diameter of the riser. For a noise reduction device with such a structure, since the alternating current of the riser will generate a strong alternating magnetic field, by setting the diameter of the through hole to be larger than the outer diameter of the riser, there is a gap between the sound absorption and insulation component and the riser, avoiding the situation that the sound absorption and insulation component generates eddy current heating under the action of the alternating magnetic field and resulting in too high a temperature rise. Description of the Drawings

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 Structural schematic diagram of the noise reduction device provided in the embodiment of the present invention;

[0024] Figure 2 is Figure 1 Bottom view of the noise reduction device shown;

[0025] Figure 3 is Figure 1 Left view of the noise reduction device shown;

[0026] Figure 4 is Figure 2 Structural schematic diagram of the top support frame showing the top of the noise reduction device;

[0027] Figure 5 is Figure 2 Structural schematic diagram of the first outer peripheral support frame showing the left and right end faces of the noise reduction device;

[0028] Figure 6 is Figure 2 Structural schematic diagram of the second outer peripheral support frame showing the front and back end faces of the noise reduction device;

[0029] Figure 7 Partial enlarged view of the display outer peripheral cross beam, outer peripheral column and first vibration damping member provided in the embodiment of the present invention;

[0030] Figure 8 Partial enlarged view of the display second top support cross beam, outer peripheral cross beam and second vibration damping member provided in the embodiment of the present invention;

[0031] Figure 9 Partial enlarged view of the display outer peripheral cross beam and third vibration damping member provided in the embodiment of the present invention;

[0032] Figure 10 is Figure 9 Top view of the positioning pin holes on the display third vibration damping member shown;

[0033] Explanation of reference numerals:

[0034] 1 - Top support frame, 11 - First top support cross beam, 12 - Second top support cross beam;

[0035] 211 - First outer peripheral cross beam, 212 - First outer peripheral column, 221 - Second outer peripheral cross beam, 222 - Second outer peripheral cross beam;

[0036] 3 - Sound absorption and insulation component;

[0037] 41 - First vibration isolator, 42 - Second vibration isolator, 43 - Third vibration isolator, 431 - Positioning pin hole, 44 - Main machine vibration isolator;

[0038] 5 - Angle steel;

[0039] 61 - Reactor body, 62 - Reactor oil tank, 63 - Reactor radiator, 64 - Reactor riser;

[0040] 7 - Foundation plane;

[0041] 8 - Maintenance door;

[0042] 9 - Through hole. Detailed implementation mode

[0043] Next, the technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0044] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0046] Embodiment

[0047] Such as Figures 1 to 10A noise reduction device as shown can reduce the noise of oil-immersed reactors such as oil-immersed reactors, and specifically includes a support frame, a sound absorption and insulation component 3, and an anti-vibration component. Among them, as Figures 1 to 3 shown, the oil-immersed reactor includes a reactor body 61, a reactor oil tank 62, a reactor radiator 63, and a reactor riser 64. The reactor body 61 is located inside the reactor oil tank 62. The reactor radiator 63 is fixedly arranged on the reactor oil tank 62, and the reactor riser 64 is fixedly arranged on the top of the reactor oil tank 62.

[0048] The support frame in this embodiment includes a top support frame 1 and an outer peripheral support frame as Figure 4 shown. The top support frame 1 and the outer peripheral support frame enclose and cover the outside of the oil-immersed reactor. The support frame is made of square steel. Preferably, the wall thickness of the support frame supported by square steel can be set to not less than 6 mm.

[0049] Specifically refer to Figure 4 , the top support frame 1 in this embodiment includes a plurality of first top support crossbeams 11 and a plurality of second top support crossbeams 12. The first top support crossbeams 11 and the second top support crossbeams 12 are cross-connected, and the two can specifically adopt a welding connection method. For the convenience of marking in Figure 4 , along the Figure 4 the top support crossbeams arranged in parallel up and down are marked as the first top support crossbeams 11, and along the Figure 4 the top support crossbeams arranged in parallel left and right are marked as the second top support crossbeams 12.

[0050] 0052 Specifically refer to Figure 5 and Figure 6 , the outer peripheral support frame includes a first outer peripheral frame arranged on the Figure 5 front and rear end faces in Figure 2 , and a second outer peripheral frame arranged on the Figure 6 left and right end faces in Figure 2 . Among them, the first outer peripheral frame includes a plurality of first outer peripheral crossbeams 211 and a plurality of first outer peripheral columns 212. The first outer peripheral columns 212 are fixed on the foundation plane 7. The first outer peripheral crossbeams 211 are cross-connected with the first outer peripheral columns 212, and the first outer peripheral crossbeams 211 and / or the first outer peripheral columns 212 are connected to the top support frame 1. The second outer peripheral frame includes a plurality of second outer peripheral crossbeams 221 and a plurality of second outer peripheral columns 222. The second outer peripheral columns 222 are fixed on the foundation plane 7. The second outer peripheral crossbeams 221 are cross-connected with the second outer peripheral columns 222, and the second outer peripheral crossbeams 221 and / or the second outer peripheral columns 222 are connected to the top support frame 1.

[0051] The anti-vibration component includes a first anti-vibration member 41, a second anti-vibration member 42, a third anti-vibration member 43, and a main machine anti-vibration member 44.

[0052] The first vibration isolator 41 is disposed at the intersection of the first outer peripheral cross beam 211 and the first outer peripheral column 212 at an interval therebetween. For details, refer to Figure 7 . The first outer peripheral cross beam 21 protrudes from the outer surface of the first outer peripheral column 212. One end arm of the angle steel 5 is fixedly provided on the first outer peripheral cross beam 211. The fastening and connecting member sequentially connects the other end arm of the angle steel 5, the first vibration isolator 41 and the second outer peripheral column 222. The first vibration isolator 41 is a Figure 7 ring-shaped rubber vibration isolator as shown, and it is disposed between the first outer peripheral column 212 and the angle steel 5. It should be noted that the setting manner between the second outer peripheral cross beam 221 and the second outer peripheral column 222 is the same as that between the first outer peripheral cross beam 211 and the first outer peripheral column 212.

[0053] In this embodiment, the second vibration isolator 42 is disposed at the intersection of the top support frame 1 and the outer peripheral support frame at an interval therebetween. As Figure 8 shown, the second top support cross beam 12 is connected to the top of the second vibration isolator 42 through a fastening and connecting member, and the bottom of the second vibration isolator 42 is connected to the first outer peripheral cross beam 211 through a fastening and connecting member. The second vibration isolator 42 is a Figure 8 tapered damping rubber vibration isolator as shown. The tapered damping rubber vibration isolator belongs to a compression-shear composite vibration isolator, which has a large energy consumption and a better vibration isolation effect. It should be noted that the setting manner between the second outer peripheral cross beam 221 and the second top support cross beam 12 is the same as that between the first outer peripheral cross beam 211 and the second top support cross beam 12.

[0054] As Figure 2 and Figure 9 shown, the first outer peripheral cross beam 211 at the bottom is fixed to the foundation plane 7 through the third vibration isolator 43, and the bottom of the oil-immersed reactor is fixed to the foundation plane 7 through the main machine vibration isolator 44. Specifically, both the third vibration isolator 43 and the main machine vibration isolator 44 are multi-layer rubber vibration isolators. Among them Figure 9 there are two layers of rubber vibration isolators provided, and the parameters such as thickness and density of the two layers of rubber vibration isolators can be set differently. Of course, three or more layers of rubber vibration isolators can also be provided. Compared with a single-layer rubber vibration isolator, since there is a possibility of the coincidence effect occurring in the single-layer rubber vibration isolator, the coincidence effect refers to the vibration being transmitted without attenuation in a certain specific frequency band, and the possibility of generating the coincidence effect can be reduced by providing multi-layer rubber vibration isolators.

[0055] As Figure 10As shown, positioning pin holes 431 are provided on the multi-layer rubber vibration isolator pads. The fastening connectors are successively connected to the first outer peripheral cross beam 211 at the bottom, the positioning pin holes 431, and the foundation plane 7, and the fastening connectors are successively connected to the bottom of the oil-immersed reactor, the positioning pin holes 431, and the foundation plane 7.

[0056] It should be noted that the setting manner between the second outer peripheral cross beam 221 at the bottom and the foundation plane 7 is the same as that between the first outer peripheral cross beam 211 at the bottom and the foundation plane 7.

[0057] By providing the third vibration isolator 43, the third vibration isolator 43 can prevent the first outer peripheral cross beam 211 and the second outer peripheral cross beam 221 from transmitting vibrations to the foundation plane 7, thereby avoiding the occurrence of secondary noise caused by vibrations and obtaining a better noise reduction effect. By providing the main machine vibration isolator 44, the main machine vibration isolator 44 can reduce the vibrations transmitted by the equipment to be noise-reduced to the foundation plane 7, thereby avoiding the occurrence of secondary noise caused by vibrations and obtaining a better noise reduction effect.

[0058] In this embodiment, the sound absorption and insulation component 3 can be fixed to the periphery of the support frame by welding. Specifically, it includes a sound absorption unit and a sound insulation unit stacked thereon, which are successively arranged in a direction away from the support frame. The sound absorption unit is a porous resistive sound absorption structure or a double-resonance sound absorption structure, and the sound insulation unit is a metal-rubber composite sound insulation structure or a metal sound insulation board. Preferably, the total thickness of the sound absorption and insulation component 3 can be set to not more than 125 mm, and the distance between the sound absorption and insulation component 3 and the reactor oil tank 62 is not less than 5 cm. By setting the distance between the sound absorption and insulation component 3 and the reactor oil tank 62 to not less than 5 cm, direct coupling of noise is avoided. It should be noted that the periphery of the support frame refers to the side of the support frame away from the reactor.

[0059] When the sound absorption unit is a porous resistive sound absorption structure, the porous resistive sound absorption structure can be set as a pre-oxidized fiber sound absorption felt. Preferably, the thickness of the pre-oxidized fiber sound absorption felt can be set to not more than 100 mm to achieve a sound absorption coefficient greater than 0.25 at 125 Hz, a sound absorption coefficient not less than 0.7 in the range of 500 Hz - 1600 Hz, and a noise reduction coefficient not less than 0.75; or, when the sound absorption unit is a double-resonance sound absorption structure, the double-resonance sound absorption structure can be set as a micro-hole fiber composite sound absorption board. Preferably, the thickness of the micro-hole fiber composite sound absorption board can be set to not more than 120 mm, which can meet the efficient absorption of power grid low-frequency noise and full-frequency coverage, so as to achieve a sound absorption coefficient greater than 0.35 at 125 Hz, a sound absorption coefficient not less than 0.6 in the range of 500 Hz - 1600 Hz, and a noise reduction coefficient not less than 0.8.

[0060] When the sound insulation unit is a metal-rubber composite sound insulation structure, it can be set that the metal-rubber composite sound insulation structure includes a first metal plate, a rubber plate, and a second metal plate stacked in sequence. Preferably, the thickness of the metal composite sound insulation structure can be set to not more than 5 mm. Further preferably, the thickness of the first metal plate can be set to 2 mm, the thickness of the rubber plate can be set to 1 mm, and the thickness of the second metal plate can be set to 1 mm, and its weighted sound insulation amount is not less than 40 dB; or, when the sound insulation unit is a metal sound insulation board, the metal sound insulation board can be set as a homogeneous metal sound insulation board. Preferably, the thickness of the homogeneous metal sound insulation board can be set to not more than 5 mm, and its weighted sound insulation amount is not less than 35 dB.

[0061] As Figure 1 shown, a through hole 9 allowing the riser of the oil-immersed reactor to pass through is provided on the sound absorption and insulation component 3 covering the top support frame 1, and the diameter of the through hole 9 is greater than the outer diameter of the reactor riser 64; and a maintenance structure such as a maintenance door 8 as Figure 3 shown is provided on the sound absorption and insulation component 3 covering the outer peripheral support frame.

[0062] Since the alternating current of the riser will generate a strong alternating magnetic field, by setting the diameter of the through hole 9 to be greater than the outer diameter of the riser, a gap is formed between the sound absorption and insulation component 3 and the riser, avoiding the situation that the sound absorption and insulation component 3 generates eddy current heating under the action of the alternating magnetic field and resulting in excessive temperature rise.

[0063] A noise reduction device of the present invention is provided with a vibration isolation component. The first vibration isolation member 41 can prevent the first outer peripheral column 212 from transmitting vibration to the first outer peripheral cross beam 211 and prevent the second outer peripheral column 222 from transmitting vibration to the second outer peripheral cross beam 221. The second vibration isolation member 42 can prevent the first outer peripheral support frame from transmitting vibration to the top support frame 1 and the sound absorption and insulation component 3 and prevent the second outer peripheral support frame from transmitting vibration to the top support frame 1 and the sound absorption and insulation component 3, thereby avoiding the situation of generating secondary noise due to vibration, so as to obtain a better noise reduction effect; and it effectively adapts to the noise spectrum characteristics of the reactor, having a higher sound absorption coefficient and sound insulation amount at 100 Hz and integer multiple frequencies; and the support frame, the sound absorption and insulation component 3, and the vibration isolation component are all in a modular splicing manner, which can be combined and completed in a short time, effectively reducing the power outage maintenance time of the in-service reactor and reducing the power outage loss.

[0064] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A noise reduction device, characterized in that, Comprising: A support frame, which includes a top support frame and a peripheral support frame. The top support frame and the peripheral support frame are enclosed and covered outside the equipment to be noise-reduced. The peripheral support frame includes a plurality of peripheral cross beams and a plurality of peripheral columns. The peripheral columns are fixed on the foundation plane, the peripheral cross beams are cross-connected with the peripheral columns, and the peripheral cross beams and / or the peripheral columns are connected with the top support frame; An acoustic absorption and insulation component, fixed on the periphery of the support frame; A vibration isolation component, including a first vibration isolation member and a second vibration isolation member. The first vibration isolation member is arranged at the cross connection of the peripheral cross beam and the peripheral column with a space therebetween, and the second vibration isolation member is arranged at the cross connection of the top support frame and the peripheral support frame with a space therebetween; The vibration isolation component further includes a third vibration isolation member, and the peripheral cross beam at the bottom is fixed on the foundation plane through the third vibration isolation member; The acoustic absorption and insulation component includes an acoustic absorption unit and a sound insulation unit stacked therewith. The acoustic absorption unit is a porous resistive acoustic absorption structure or a double-resonance acoustic absorption structure, and the sound insulation unit is a metal-rubber composite sound insulation structure or a metal sound insulation board; The porous resistive acoustic absorption structure is a pre-oxidized fiber acoustic absorption felt; The double-resonance acoustic absorption structure is a micro-hole fiber composite acoustic absorption board.

2. The noise reduction device according to claim 1, characterized in that, The vibration isolation component further includes a main machine vibration isolation member, and the bottom of the equipment to be noise-reduced is fixed on the foundation plane through the main machine vibration isolation member.

3. The noise reduction device according to claim 2, characterized in that, The first vibration isolation member is an annular rubber vibration isolator, the second vibration isolation member is a conical damping rubber vibration isolator, and both the third vibration isolation member and the main machine vibration isolation member are multi-layer rubber vibration isolation pads.

4. The noise reduction device according to claim 1, characterized in that, The metal-rubber composite sound insulation structure includes a first metal plate, a rubber plate and a second metal plate stacked in sequence.

5. The noise reduction device according to claim 1, characterized in that, The equipment to be noise-reduced is an oil-immersed reactor.

6. The noise reduction device according to claim 5, characterized in that, A through hole allowing the riser of the oil-immersed reactor to pass through is provided on the acoustic absorption and insulation component covering the top support frame, and the diameter of the through hole is larger than the outer diameter of the riser.

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