Noise control device

Abstract

The invention relates to the technical field of power equipment noise control, and discloses a noise control device, which comprises a sound control box, the sound control box is internally provided with a plurality of resonant cavities with different sizes, the sound control box is provided with a plurality of communicating holes, and the communicating holes are respectively communicated with different resonant cavities; the opening degree adjusting modules are installed on the sound control box, the opening degree adjusting modules correspond to the communicating holes in a one-to-one mode, and the opening degree adjusting modules are used for adjusting the sizes of the communicating holes. The invention provides a noise control device which can better control noise with different frequency peak values generated by power equipment of a transformer substation.

Description

Technical Field

[0001] The present invention relates to the technical field of noise control of electric power equipment, and in particular to a noise control device. Background Art

[0002] At present, the main noise sources of power equipment in substations are main transformers and high-voltage shunt reactors. However, due to the different power equipment in substations, the frequency peaks of the noise they generate are also different. The noise control devices in the existing technology have fixed structures and have different sound control effects on noise sources with different frequency peaks. Therefore, they cannot effectively control noise with different frequency peaks at the same time. Summary of the Invention

[0003] The object of the present invention is to provide a noise control device that can better control noises with multiple different frequency peaks generated by power equipment in a substation.

[0004] In order to achieve the above object, the present invention provides a noise control device, comprising:

[0005] A control sound box, wherein a plurality of resonance cavities of different sizes are provided in the control sound box, and a plurality of communication holes are opened in the control sound box, wherein the plurality of communication holes are respectively connected to different resonance cavities;

[0006] A plurality of opening adjustment modules are installed on the sound control box. The plurality of opening adjustment modules correspond to the plurality of communication holes in a one-to-one manner. The opening adjustment modules are used to adjust the size of the communication holes.

[0007] Preferably, a first adjustment plate, a second adjustment plate and a third adjustment plate are provided in the control sound box, the first adjustment plate, the second adjustment plate and the third adjustment plate are perpendicular to each other, and the first adjustment plate, the second adjustment plate and the third adjustment plate divide the interior of the control sound box into the multiple resonance cavities.

[0008] Preferably, the first adjustment plate, the second adjustment plate and the third adjustment plate each include:

[0009] A first plate body, wherein a first groove is formed on one side of the first plate body;

[0010] A second plate body, wherein a second groove is formed on one side of the second plate body, the side of the second plate body having the second groove is connected to the side of the first plate body having the first groove, and the second groove is connected to the first groove to form an interlayer groove;

[0011] A sound absorbing material is provided in the interlayer groove.

[0012] Preferably, the first adjustment plate, the second adjustment plate and the third adjustment plate are each provided with a slot along an edge thereof, and the first adjustment plate, the second adjustment plate and the third adjustment plate each comprise:

[0013] A sealing ring is embedded in the slot.

[0014] Preferably, the opening adjustment module includes:

[0015] a base, the base being mounted on the outer side of the sound control box, the base being provided with a center hole, a first rotation shaft hole, and a plurality of second rotation shaft holes, the center hole corresponding to the communicating hole, the plurality of second rotation shaft holes being circumferentially spaced around the center hole, and the distance between the first rotation shaft hole and the center hole being not less than the distance between the second rotation shaft hole and the center hole;

[0016] an adjusting rod, the adjusting rod being inserted into the first rotating shaft hole;

[0017] a first adjusting wheel, the first adjusting wheel being sleeved outside the adjusting rod;

[0018] a plurality of rotating shafts, each of the rotating shafts being inserted into a different second rotating shaft hole;

[0019] a plurality of second adjusting wheels, each of the second adjusting wheels being respectively sleeved outside a different rotating shaft;

[0020] a conveyor belt, the conveyor belt being sequentially connected to the outer sides of the first adjusting wheel and the plurality of second adjusting wheels along the circumference of the base;

[0021] Multiple adjustment plates, each of which is connected to a different first adjustment wheel, and multiple adjustment plates include overlapping parts. When the area of the overlapping parts gradually increases, the area blocked by the center hole and the connecting hole gradually increases. When the area of the overlapping parts gradually decreases, the area blocked by the center hole and the connecting hole gradually decreases.

[0022] Preferably, it also includes:

[0023] a plurality of plug-in tubes, wherein the first ends of the plurality of plug-in tubes are respectively connected to the central holes of different opening adjustment modules;

[0024] A plurality of communicating tubes, wherein the first ends of the plurality of communicating tubes are respectively connected to different communicating holes, and the second ends of the communicating tubes are inserted into the second end of the plug tube.

[0025] Preferably, the sound control box includes:

[0026] A box body, wherein the plurality of resonance cavities are provided in the box body, and one side of the box body is open;

[0027] The cover body is detachably connected to the opening of the box body, the communicating hole is provided on the cover body, and the opening adjustment module is installed on the outer side of the cover body.

[0028] Preferably, the box body is provided with a first annular mounting groove on the inner side near its opening, and the cover body is provided with a second annular mounting groove on the outer side near the opening. The wall of the box body near its opening is inserted into the second mounting groove, and the wall of the cover body near the opening is inserted into the first mounting groove.

[0029] Preferably, the control speaker box is provided in plurality, and the shape of the control speaker box is a rectangular parallelepiped, the control speaker box extends along a first direction, the communicating hole is provided on one side of the control speaker box in the first direction, an outer side wall of the control speaker box in the second direction is provided with a splicing groove, and another outer side wall of the control speaker box in the second direction is provided with a splicing joint, the outer side wall of the control speaker box in the third direction is provided with a splicing groove, and another outer side wall of the control speaker box in the second direction is provided with a splicing joint, and the splicing groove and the splicing joint are adapted to each other;

[0030] Two adjacent control sound boxes are connected in the second direction or the third direction through the splicing joint and the splicing groove, and a plurality of control sound boxes are connected to form a sound control module;

[0031] The first direction, the second direction and the third direction are perpendicular to each other.

[0032] Preferably, it also includes:

[0033] The frame is sleeved outside the sound control module, and a matching splicing joint is provided on the inner side wall of the frame at a position corresponding to the splicing groove of the sound control module, and a matching splicing groove is opened on the inner side wall of the frame at a position corresponding to the splicing joint of the sound control module.

[0034] Compared with the prior art, a noise control device according to an embodiment of the present invention has the following beneficial effects: a plurality of resonance cavities of different sizes are provided in the control sound box, and the frequencies of the plurality of resonance cavities are adapted to noises with a plurality of different frequency peaks. Noise enters different resonance cavities from the various connecting holes on the control sound box. When the frequency of the noise is the same as the frequency of the resonance cavity, resonance occurs, consuming the most sound energy and achieving the best sound control effect. Therefore, noises with a plurality of different frequency peaks can be silenced by resonance.

[0035] The noise frequency of power equipment such as main transformers and high-voltage shunt reactors is mainly concentrated in the low-frequency band, usually below 500Hz. The air pressure loss in the environment where the noise of this frequency is located is small. When faced with noise with multiple different frequency peaks generated by such power equipment, the size of each connecting hole is adjusted through the opening adjustment module. The smaller the size of the connecting hole corresponding to the resonant cavity, the lower the frequency of the resonant cavity, and vice versa. The frequency of each resonant cavity can be adjusted more accurately, thereby better controlling the noise of multiple different frequency peaks generated by the substation power equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of a noise control device according to an embodiment of the present invention;

[0037] Figure 2 is a schematic diagram of the explosion structure of the noise control device according to an embodiment of the present invention;

[0038] Figure 3 is a cross-sectional view of the noise control device according to an embodiment of the present invention along the second direction Y;

[0039] Figure 4 is a cross-sectional view of the noise control device according to an embodiment of the present invention along a first direction X;

[0040] Figure 5 is a schematic structural diagram of the first adjustment plate, the second adjustment plate, or the third adjustment plate according to an embodiment of the present invention;

[0041] Figure 6 2 is a schematic structural diagram of an opening adjustment module according to an embodiment of the present invention;

[0042] Figure 7 Schematic diagram of the exploded structure of the opening adjustment module according to an embodiment of the present invention;

[0043] Figure 8 is a cross-sectional view of the base and the plug-in tube according to an embodiment of the present invention;

[0044] Figure 9 is a structural schematic diagram of a noise control device according to another embodiment of the present invention;

[0045] In the figure, 1. frame; 2. sound control module; 21. sound control box; 211. connecting hole; 212. box body; 2121. first mounting slot; 213. cover body; 2131. second mounting slot; 3. opening adjustment module; 31. base; 311. center hole; 312. first rotating shaft hole; 313. second rotating shaft hole; 32. adjusting rod; 33. first adjusting wheel; 34. rotating shaft; 35. second adjusting wheel; 36. conveyor belt; 37. adjusting piece; 4. first adjusting plate; 5. second adjusting plate; 6. third adjusting plate; 7. first plate body; 71. first groove; 8. second plate body; 81. second groove; 9. interlayer groove; 10. sound-absorbing material; 11. slot; 12. sealing ring; 13. plug-in tube; 14. connecting tube; 15. splicing groove; 16. splicing joint; 17. resonance cavity. DETAILED DESCRIPTION

[0046] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0047] In the description of the present invention, it should be understood that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention in specific contexts.

[0048] In the description of the present invention, it should be understood that the terms "first", "second" and "third" used in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "transverse", "longitudinal", "X-axis direction", "Y-axis direction", "Z-axis direction" and the like 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 limiting the present invention. Moreover, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0049] like Figure 1-2As shown, a noise control device according to an embodiment of the present invention includes: a control sound box 21 and a plurality of opening adjustment modules 3;

[0050] The control speaker box 21 is provided with a plurality of resonance cavities 17 of different sizes. The control speaker box 21 is provided with a plurality of communication holes 211 , and the plurality of communication holes 211 are connected to different resonance cavities 17 respectively.

[0051] The opening adjustment module 3 is mounted on the sound control box 21 . There is a one-to-one correspondence between the plurality of opening adjustment modules 3 and the plurality of communication holes 211 . The opening adjustment module 3 is used to adjust the size of the communication holes 211 .

[0052] It should be noted that a plurality of resonance cavities 17 of different sizes are provided in the control sound box 21. The frequencies of the plurality of resonance cavities 17 are adapted to noises with a plurality of different frequency peaks. The noise enters different resonance cavities 17 from the various connecting holes 211 on the control sound box 21. When the frequency of the noise is the same as the frequency of the resonance cavity 17, resonance occurs, consuming the most sound energy and achieving the best sound control effect. Therefore, it is possible to resonate and silence noises with a plurality of different frequency peaks.

[0053] The noise frequency of power equipment such as the main transformer and high-voltage shunt reactor is mainly concentrated in the low frequency band, usually below 500 Hz. The air pressure loss in the environment where the noise of this frequency is located is small. When faced with noise with multiple different frequency peaks generated by such power equipment, the size of each connecting hole 211 is adjusted by the opening adjustment module 3. The smaller the size of the connecting hole 211 corresponding to the resonance cavity 17, the lower the frequency of the resonance cavity 17, and vice versa. The frequency of each resonance cavity 17 can be adjusted more accurately, thereby better controlling the noise with multiple different frequency peaks generated by the power equipment of the substation.

[0054] like Figure 1-4 As shown, in a more specific embodiment, a first adjustment plate 4, a second adjustment plate 5 and a third adjustment plate 6 are provided in the control sound box 21. The first adjustment plate 4, the second adjustment plate 5 and the third adjustment plate 6 are perpendicular to each other. The first adjustment plate 4, the second adjustment plate 5 and the third adjustment plate 6 divide the interior of the control sound box 21 into multiple resonance cavities 17.

[0055] It should be noted that the first adjustment plate 4, the second adjustment plate 5 and the third adjustment plate 6 are perpendicular to each other. By adjusting the positions of the first adjustment plate 4, the second adjustment plate 5 and the third adjustment plate 6 in the sound control box 21, the sizes of the multiple resonance cavities 17 formed can be adjusted.

[0056] The noise frequency of power equipment such as main transformers and high-voltage shunt reactors is mainly concentrated in the low-frequency band, usually below 500Hz, with obvious peaks at 100Hz, 200Hz, and 400Hz. Their frequencies are usually related to the 50Hz power supply frequency and its harmonics.

[0057] Therefore, when there are three frequency peaks, the first adjustment plate 4, the second adjustment plate 5 and the third adjustment plate 6 are preferably one each, and the connecting hole 211 is opened on one side of the control sound box 21 in the first direction X, and the edges on both sides of the first adjustment plate 4 in the second direction Y are connected to the inner side wall of the control sound box 21 in the second direction Y, and the edges on both sides of the first adjustment plate 4 in the third direction Z are connected to the inner side wall of the control sound box 21 in the third direction Z. Adjusting the position of the first adjustment plate 4 in the first direction X is to adjust the length of the resonance cavity 17 in the first direction X.

[0058] The edges on both sides of the second adjustment plate 5 in the third direction Z are connected to the inner wall of the control sound box 21 in the third direction Z, and the edges on both sides of the second adjustment plate 5 in the first direction X are respectively connected to the first adjustment plate 4 and the inner wall where the connecting hole 211 is located, thereby dividing it into two resonance cavities 17. Adjusting the position of the second adjustment plate 5 in the second direction Y can adjust the length of the two resonance cavities 17 in the second direction Y.

[0059] The edges on both sides of the third adjustment plate 6 in the second direction Y are respectively connected to the inner side wall of the control sound box 21 in the second direction Y and the second adjustment plate 5, and the edges on both sides of the third adjustment plate 6 in the first direction X are respectively installed on the length mounting plate and the inner side wall where the connecting hole 211 is located, thereby dividing it into three resonance cavities 17. By adjusting the position of the third adjustment plate 6 in the third direction Z, the lengths of two of the resonance cavities 17 in the third direction Z can be adjusted, thereby dividing it into three resonance cavities 17 of different sizes, and being able to perform targeted resonance silencing on the noise of the three frequency peaks.

[0060] The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0061] like Figure 5 As shown, in a more specific embodiment, the first adjustment plate 4, the second adjustment plate 5 and the third adjustment plate 6 each include: a first plate body 7, a second plate body 8 and a sound absorbing material 10;

[0062] A first groove 71 is formed on one side of the first plate 7;

[0063] A second groove 81 is formed on one side of the second plate 8. The side of the second plate 8 with the second groove 81 is connected to the side of the first plate 7 with the first groove 71. The second groove 81 is connected to the first groove 71 to form an interlayer groove 9.

[0064] The sound absorbing material 10 is disposed in the interlayer groove 9 .

[0065] It should be noted that the side of the first plate with the first groove 71 is connected to the side of the second plate body 8 with the second groove 81, the second groove 81 is connected to the first groove 71 to form an interlayer groove 9, and the sound-absorbing material 10 is arranged in the interlayer groove 9. Since the first adjustment plate 4, the second adjustment plate 5 and the third adjustment plate 6 divide the sound control box 21 into multiple resonance cavities 17, a part of the wall of the resonance cavity 17 is an adjustment plate. The sound-absorbing material 10 in the interlayer groove 9 can absorb excess sound waves in the resonance cavity 17, reduce sound reflection and reverberation, and improve the sound control effect of the resonance cavity 17.

[0066] The sound-absorbing material 10 is preferably sound-absorbing cotton.

[0067] like Figure 5 As shown, in a more specific embodiment, the first adjustment plate 4 , the second adjustment plate 5 and the third adjustment plate 6 are all provided with a card slot 11 along the edge, and the first adjustment plate 4 , the second adjustment plate 5 and the third adjustment plate 6 all include: a sealing ring 12, which is embedded in the card slot 11.

[0068] It should be noted that the first adjustment plate 4, the second adjustment plate 5 and the third adjustment plate 6 are all provided with a slot 11 along the edge, and the sealing ring 12 is embedded in the slot 11. The sound insulation ring can effectively fill the gap between the two adjustment plates and between the adjustment plate and the inner wall of the control sound box 21, thereby improving the sealing of the resonance cavity 17.

[0069] The material of the sealing ring 12 is preferably rubber.

[0070] like Figure 6-7 As shown, in a more specific embodiment, the opening adjustment module 3 includes: a base 31, an adjustment rod 32, a first adjustment wheel 33, a conveyor belt 36, a plurality of rotating shafts 34, a plurality of second adjustment wheels 35 and a plurality of adjustment pieces 37;

[0071] The base 31 is mounted on the outside of the control speaker box 21. The base 31 defines a center hole 311, a first rotation axis hole 312, and a plurality of second rotation axis holes 313. The center hole 311 corresponds to the communication hole 211. The plurality of second rotation axis holes 313 are circumferentially spaced around the center hole 311. The distance between the first rotation axis hole 312 and the center hole 311 is not less than the distance between the second rotation axis holes 313 and the center hole 311.

[0072] The adjusting rod 32 is inserted into the first rotating shaft hole 312;

[0073] The first adjusting wheel 33 is sleeved on the outside of the adjusting rod 32;

[0074] Each rotating shaft 34 is inserted into a different second rotating shaft hole 313;

[0075] Each second adjusting wheel 35 is respectively sleeved on a different rotating shaft 34;

[0076] The conveyor belt 36 is sequentially connected to the outer sides of the first adjusting wheel 33 and the plurality of second adjusting wheels 35 along the circumference of the base 31;

[0077] Each adjustment piece 37 is connected to a different first adjustment wheel 33, and multiple adjustment pieces 37 include overlapping parts. When the area of the overlapping parts gradually increases, the area blocked by the center hole 311 and the connecting hole 211 gradually increases. When the area of the overlapping parts gradually decreases, the area blocked by the center hole 311 and the connecting hole 211 gradually decreases.

[0078] It should be noted that the base 31 is mounted on the outside of the control speaker 21, and the center hole 311 corresponds to the connecting hole 211. The center hole 311 and the connecting hole 211 are coaxial and have a diameter no smaller than that of the connecting hole 211. Therefore, when the adjustment rod 32 is rotated, the adjustment rod 32 drives the first adjustment wheel 33 to rotate synchronously. The friction between the first adjustment wheel 33 and the conveyor belt 36 drives the conveyor belt 36 to move. The friction between the conveyor belt 36 and each second adjustment wheel 35 drives each second adjustment wheel 35 to rotate about the central axis of the rotating shaft 34. The second adjustment wheels 35 rotate synchronously, and the adjustment plates 37 connected to each second adjustment wheel 35 also rotate synchronously. The adjustment plates 37 have the same structure.

[0079] In the initial state, the extension direction of the free end of each adjustment piece 37 is toward the direction of the center hole 311, and the area of the overlapping part of multiple adjustment pieces 37 is the largest. At this time, the center hole 311 is completely blocked, and the corresponding connecting hole 211 is also completely blocked, and the size of the connecting hole 211 is 0.

[0080] As the second adjustment wheel 35 rotates, the adjustment plates 37 also rotate synchronously. As the multiple adjustment plates 37 rotate to the point where they overlap, the area of the portion gradually decreases, and the area blocked by the center hole 311 gradually decreases, thereby gradually reducing the area blocked by the communication hole 211. Conversely, as the multiple adjustment plates 37 rotate to the point where they overlap, the area blocked by the center hole 311 gradually increases, thereby gradually increasing the area blocked by the communication hole 211.

[0081] In another more specific embodiment, the driving device drives the multiple rotating shafts 34 to rotate synchronously, thereby driving the second adjusting wheel 35 to rotate synchronously, and the second adjusting wheel 35 drives the adjusting piece 37 to rotate.

[0082] In another more specific embodiment, the opening adjustment module 3 includes a shielding member covering the connecting hole 211, and the size of the shielding member is adjustable. For example, the shielding member can be telescopically adjusted in size, thereby adjusting the area of the connecting hole 211 blocked by the shielding member and adjusting the size of the aperture of the connecting hole 211 connecting to the outside world.

[0083] like Figure 1-2, 6-8, in a more specific embodiment, further comprising: a plurality of plug-in tubes 13 and a plurality of connecting tubes 14;

[0084] The first ends of the respective plug-in tubes 13 are connected to the central holes 311 of the different opening adjustment modules 3;

[0085] The first end of each communicating tube 14 is connected to a different communicating hole 211 , and the second end of the communicating tube 14 is inserted into the second end of the inserting tube 13 .

[0086] It should be noted that the plug-in tube 13 is connected to the center hole 311 of the opening adjustment module 3, the plug-in tube 13 and the center hole 311 are coaxial, the connecting tube 14 is connected to the connecting hole 211, the connecting tube 14 and the connecting hole 211 are coaxial, and the second end of the connecting tube 14 is inserted into the second end of the plug-in tube 13 to form a channel between the center hole 311 and the connecting hole 211, thereby avoiding the situation where noise enters the center hole 311 and passes through the gap between the center hole 311 and the connecting hole 211 and cannot smoothly enter the connecting hole 211.

[0087] The outer diameter of the second end of the connecting pipe 14 is the same as the inner diameter of the second end of the inserting pipe 13 , which improves the tightness of the connection.

[0088] like Figure 1 、 3 As shown, in a more specific embodiment, the control speaker box 21 includes: a box body 212 and a cover body 213;

[0089] A plurality of resonance cavities 17 are provided in the box 212, and one side of the box 212 is open;

[0090] The cover 213 is detachably connected to the opening of the box 212 . The communication hole 211 is formed on the cover 213 . The opening adjustment module 3 is mounted on the outer side of the cover 213 .

[0091] It should be noted that when a component in the box body 212 fails, the user can open the cover 213 to repair the component in the box body 212, such as each adjustment plate.

[0092] The connecting hole 211 is opened on the cover 213, so when the cover 213 is connected to the opening of the box 212, the noise can enter the resonance cavity 17 in the box 212 through the connecting hole 211, and the opening adjustment module 3 is installed on the outer side of the cover 213 corresponding to the connecting hole 211.

[0093] A sealing ring 12 is provided at the connection between the cover 213 and the box body 212 .

[0094] like Figure 2 、 4As shown, in a more specific embodiment, the box body 212 is provided with a first annular mounting groove 2121 on the inner side near its opening, and the cover body 213 is provided with a second annular mounting groove 2131 on the outer side near the opening. The wall of the box body 212 near its opening is inserted into the second mounting groove 2131, and the wall of the cover body 213 near the opening is inserted into the first mounting groove 2121.

[0095] It should be noted that a first annular mounting groove 2121 is provided on the inner side of the box body 212 near its opening to form a step, and a second annular mounting groove 2131 is provided on the outer side of the cover body 213 near its opening to form a step. The wall of the box body 212 near its opening is inserted into the second mounting groove 2131, and the wall of the cover body 213 near the opening is inserted into the first mounting groove 2121. The contact surface between the cover body 213 and the box body 212 is Z-shaped from a cross-sectional view, so that the connection between the box body 212 and the cover body 213 is more stable, the sealing between the cover body 213 and the box body 212 is better, and the difficulty of assembling the cover body 213 and the box body 212 is reduced.

[0096] like Figure 1 、 9 As shown, in a more specific embodiment, a plurality of control speaker boxes 21 are provided. The control speaker boxes 21 are in the shape of a rectangular parallelepiped and extend along a first direction X. The communication hole 211 is provided on one side of the control speaker box 21 in the first direction X. A splicing groove 15 is provided on an outer side wall of the control speaker box 21 in the second direction Y. A splicing joint 16 is provided on another outer side wall of the control speaker box 21 in the second direction Y. A splicing groove 15 is provided on an outer side wall of the control speaker box 21 in the third direction Z. A splicing joint 16 is provided on another outer side wall of the control speaker box 21 in the second direction Y. The splicing groove 15 and the splicing joint 16 are adapted to each other.

[0097] Two adjacent control sound boxes 21 are connected in the second direction Y or the third direction Z through the splicing joint 16 and the splicing groove 15, and multiple control sound boxes 21 are connected to form a sound control module 2;

[0098] The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0099] It should be noted that setting up multiple control speakers 21 can increase the noise reduction amount, and multiple control speakers 21 are connected into an array sound control module 2 through corresponding splicing joints 16 and splicing grooves 15 in the second direction Y or the third direction Z, which can avoid the dispersion of multiple control speakers 21, and the sound control module 2 can be used as a sound control wall to enclose power equipment to achieve noise reduction and sound control.

[0100] The cross-sections of the splicing joint 16 and the splicing groove 15 are trapezoidal or T-shaped, which can effectively prevent the splicing joint 16 and the splicing groove 15 from loosening.

[0101] like Figure 1、 9 As shown, in a more specific embodiment, it also includes: a frame 1;

[0102] The frame 1 is sleeved on the outside of the sound control module 2, and a matching splicing joint 16 is provided at a position on the inner wall of the frame 1 corresponding to the splicing groove 15 of the sound control module 2. A matching splicing groove 15 is opened at a position on the inner wall of the frame 1 corresponding to the splicing groove 16 of the sound control module 2.

[0103] It should be noted that the frame 1 is arranged to be sleeved outside the sound control module 2, specifically, to be sleeved on both sides of the sound control module 2 in the second and third directions, and the inner side wall of the frame 1 is provided with a matching splicing joint 16 at a position corresponding to the splicing groove 15 of the sound control module 2. The inner side wall of the frame 1 is provided with a matching splicing groove 15 at a position corresponding to the splicing joint 16 of the sound control module 2, thereby making the connection between the frame 1 and the sound control module 2 tighter, and the connection between the various control speakers 21 in the sound control module 2 is also tighter, preventing noise from passing through the gaps. Therefore, when the frame 1 and the sound control module 2 act as a sound control wall to enclose the power equipment, they can isolate the noise of the power equipment within the sound control wall, preventing the noise from being transmitted outside the sound control wall.

[0104] The working process of the present invention is as follows: a plurality of resonance cavities 17 of different sizes are provided in the control sound box 21, and the frequencies of the plurality of resonance cavities 17 adapt to noises with a plurality of different frequency peaks. The noise enters different resonance cavities 17 from the various connecting holes 211 on the control sound box 21. When the frequency of the noise is the same as the frequency of the resonance cavity 17, resonance occurs, consuming the most sound energy and achieving the best sound control effect. Therefore, the noises with a plurality of different frequency peaks can be resonated and silenced.

[0105] The noise frequency of power equipment such as the main transformer and high-voltage shunt reactor is mainly concentrated in the low frequency band, usually below 500 Hz. The air pressure loss in the environment where the noise of this frequency is located is small. When faced with noise with multiple different frequency peaks generated by such power equipment, the size of each connecting hole 211 is adjusted by the opening adjustment module 3. The smaller the size of the connecting hole 211 corresponding to the resonance cavity 17, the lower the frequency of the resonance cavity 17, and vice versa. The frequency of each resonance cavity 17 can be adjusted more accurately, thereby better controlling the noise with multiple different frequency peaks generated by the power equipment of the substation.

[0106] In summary, the embodiments of the present invention provide a noise control device that can better control noises with multiple different frequency peaks generated by power equipment in a substation.

[0107] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A noise control device, characterized in that: include: A control sound box, wherein a plurality of resonance cavities of different sizes are provided in the control sound box, and a plurality of communication holes are opened in the control sound box, and each of the communication holes is connected to a different resonance cavity; A plurality of opening adjustment modules are installed on the sound control box. The plurality of opening adjustment modules correspond to the plurality of communication holes in a one-to-one manner. The opening adjustment modules are used to adjust the size of the communication holes.

2. The noise control device according to claim 1, characterized in that The control sound box is provided with a first adjustment plate, a second adjustment plate and a third adjustment plate, which are perpendicular to each other. The first adjustment plate, the second adjustment plate and the third adjustment plate divide the interior of the control sound box into the multiple resonance cavities.

3. The noise control device according to claim 2, characterized in that: The first adjustment plate, the second adjustment plate and the third adjustment plate each include: A first plate body, wherein a first groove is formed on one side of the first plate body; A second plate body, wherein a second groove is formed on one side of the second plate body, the side of the second plate body having the second groove is connected to the side of the first plate body having the first groove, and the second groove is connected to the first groove to form an interlayer groove; A sound absorbing material is provided in the interlayer groove.

4. The noise control device according to claim 2, characterized in that The first adjustment plate, the second adjustment plate and the third adjustment plate are each provided with a slot along the edge, and the first adjustment plate, the second adjustment plate and the third adjustment plate each include: A sealing ring is embedded in the slot.

5. The noise control device according to claim 1, characterized in that: The opening adjustment module includes: a base, the base being mounted on the outer side of the sound control box, the base being provided with a center hole, a first rotation shaft hole, and a plurality of second rotation shaft holes, the center hole corresponding to the communicating hole, the plurality of second rotation shaft holes being circumferentially spaced around the center hole, and the distance between the first rotation shaft hole and the center hole being not less than the distance between the second rotation shaft hole and the center hole; an adjusting rod, the adjusting rod being inserted into the first rotating shaft hole; a first adjusting wheel, the first adjusting wheel being sleeved outside the adjusting rod; a plurality of rotating shafts, each of the rotating shafts being inserted into a different second rotating shaft hole; a plurality of second adjusting wheels, each of the second adjusting wheels being respectively sleeved outside a different rotating shaft; a conveyor belt, the conveyor belt being sequentially connected to the outer sides of the first adjusting wheel and the plurality of second adjusting wheels along the circumference of the base; Multiple adjustment plates, each of which is connected to a different first adjustment wheel, and multiple adjustment plates include overlapping parts. When the area of the overlapping parts gradually increases, the area blocked by the center hole and the connecting hole gradually increases. When the area of the overlapping parts gradually decreases, the area blocked by the center hole and the connecting hole gradually decreases.

6. The noise control device according to claim 5, characterized in that: Also includes: A plurality of plug-in tubes, wherein the first ends of the respective plug-in tubes are connected to the central holes of different opening adjustment modules; A plurality of communicating tubes, wherein the first end of each communicating tube is connected to a different communicating hole, and the second end of the communicating tube is inserted into the second end of the plug tube.

7. The noise control device according to claim 1, characterized in that: The control speaker includes: A box body, wherein the plurality of resonance cavities are provided in the box body, and one side of the box body is open; The cover body is detachably connected to the opening of the box body, the communicating hole is provided on the cover body, and the opening adjustment module is installed on the outer side of the cover body.

8. The noise control device according to claim 7, characterized in that: The box body is provided with a first annular mounting groove on the inner side near its opening, and the cover body is provided with a second annular mounting groove on the outer side near the opening. The wall of the box body near its opening is inserted into the second mounting groove, and the wall of the cover body near the opening is inserted into the first mounting groove.

9. The noise control device according to claim 1, characterized in that: The control speaker is provided with a plurality of them, the shape of the control speaker is a rectangular parallelepiped, the control speaker extends along a first direction, the communicating hole is provided on one side of the control speaker in the first direction, an outer side wall of the control speaker in the second direction is provided with a splicing groove, the other outer side wall of the control speaker in the second direction is provided with a splicing joint, the outer side wall of the control speaker in the third direction is provided with a splicing groove, the other outer side wall of the control speaker in the second direction is provided with a splicing joint, the splicing groove and the splicing joint are adapted; Two adjacent control sound boxes are connected in the second direction or the third direction through the splicing joint and the splicing groove, and a plurality of control sound boxes are connected to form a sound control module; The first direction, the second direction and the third direction are perpendicular to each other.

10. The noise control device according to claim 9, characterized in that: Also includes: The frame is sleeved outside the sound control module, and a matching splicing joint is provided on the inner side wall of the frame at a position corresponding to the splicing groove of the sound control module, and a matching splicing groove is opened on the inner side wall of the frame at a position corresponding to the splicing joint of the sound control module.

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