Noise and vibration control device for converter station of transformer substation

Abstract

The invention discloses a transformer substation converter station noise and vibration control device, and belongs to the technical field of transformer substations or converter stations, the transformer substation converter station noise and vibration control device comprises a box body, the box body is a six-edge cylinder, the upper part and the lower part of the box body are not provided with bottom surfaces, the upper end of the box body is detachably and fixedly connected with a box cover, and the side wall of the box body is provided with a butt joint port; an inner box is fixedly arranged in the box body, a first-stage noise reduction assembly is arranged in the inner box, a second-stage noise reduction assembly is arranged in the box body and located below the inner box, a third-stage noise reduction assembly is arranged on the side wall of the box body, and a cover body noise reduction part is arranged in the box cover. A fixing assembly used for fixing the box body is arranged on the side wall of the box body. In the process that noise penetrates through the box body, the noise is weakened through the first-stage noise reduction assembly, the second-stage noise reduction assembly, the third-stage noise reduction assembly and the cover body noise reduction part in the box body, and the noise generated by power equipment in a transformer substation or a convertor station is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of substations or converter stations, and particularly relates to a noise and vibration control device for substations and converter stations. Background Art

[0002] Converter stations are mainly power conversion stations used to convert alternating current into direct current or direct current into alternating current. Converter stations are mainly used in DC power transmission systems, which can make the power more stable, avoid voltage control problems and loss problems, and at the same time can also play a role in grid connection and reliability guarantee. A substation is a power conversion station in an AC power transmission system, mainly used to convert the electrical energy of high-voltage transmission lines into low-voltage electrical energy to meet the needs of different power consumption places. Substations can also stabilize, manage and control the voltage to input electrical energy into different power consumption places. Converter stations and substations play different roles in power conversion and voltage control, and are of great significance to the stability and reliability of the power grid. The noise of substations and converter stations mainly includes the noise of equipment such as transformers, converter transformers, reactors, and arc suppression coils. The function of the arc suppression coil is to suppress high-frequency noise in the circuit. Its principle is to use the principle of electromagnetic induction. By placing a magnetic material wound with a certain number of coils in the circuit, when there is high-frequency noise in the circuit, electromagnetic induction will be generated, and then the high-frequency noise will be converted into low-frequency noise, thereby suppressing the high-frequency noise in the circuit and achieving the purpose of reducing noise. Although the arc suppression coil has the effect of reducing noise, the reduced low-frequency noise is actually still relatively large, especially the low-frequency noise of the arc suppression coil of substations and converter stations near residential areas, which is particularly obvious at night. The present invention aims to weaken or eliminate the low-frequency noise of the arc suppression coil equipment, and the three measures for controlling noise are: preventing noise generation (weakening at the sound source), blocking noise propagation (weakening in the propagation process), and preventing noise from entering the human ear (weakening at the human ear). At present, in terms of equipment selection, low-noise and low-vibration equipment should be preferentially selected to reduce noise generation from the source. However, for equipment that has been installed and operated, even if it is high-noise and high-vibration, it cannot be directly replaced with low-noise and low-vibration equipment because of the high economic cost. Secondly, weakening noise at the human ear and preventing noise from entering the human ear cannot be achieved either, because it is impossible to force nearby residents to wear sound insulation earplugs all the time. The only feasible way is to weaken noise in the propagation process or block the path of noise propagation. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a noise and vibration control device for substations and converter stations, which solves the problems in the above background art.

[0004] The object of the present invention is achieved as follows: A noise and vibration control device for a substation converter station, which comprises a box body. The box body is a hexagonal cylinder without bottom surfaces at the upper and lower ends. A box cover is detachably and fixedly connected to the upper end of the box body. An interface is provided on the side wall of the box body. An inner box is fixedly arranged inside the box body. A primary sound-absorbing component is arranged inside the inner box. A secondary sound-absorbing component is arranged below the inner box inside the box body. A tertiary sound-absorbing component is arranged on the side wall of the box body. A cover body sound-absorbing part is arranged inside the box cover. A fixing component for fixing the box body is arranged on the side wall of the box body. During use, a sound-emitting device is installed at the interface position of the box body, so that the noise emitted by the sound-emitting device is transmitted outward after passing through the box body. During the process of the noise passing through the box body, the noise is weakened by the primary sound-absorbing component, secondary sound-absorbing component, tertiary sound-absorbing component and cover body sound-absorbing part inside the box body, reducing the noise emitted by the power equipment inside the substation or converter station.

[0005] Further, the primary sound-absorbing component includes an intermediate plate fixedly arranged inside the inner box. A plurality of first through holes are formed on the plate surface of the intermediate plate. A plurality of second through holes are formed on the plate surface of the inner bottom plate of the inner box. A plurality of soft cotton balls are arranged between the inner bottom plate and the intermediate plate, and the diameter of the soft cotton balls is larger than the diameter of the first through holes and larger than the diameter of the second through holes. During use, the noise emitted by the power equipment is transmitted into the inner box through the interface. Inside the inner box, the noise drives the soft cotton balls to move. During the movement of the soft cotton balls, the noise is offset, weakening the noise and completing the first noise reduction. Then, the noise weakened by passing through the second through holes flows into the inside of the box body for continuous weakening.

[0006] Further, the secondary sound-absorbing component includes a plurality of cross plates fixedly connected to the inner side wall of the box body, and the plurality of cross plates are respectively fixedly connected to different surfaces of the hexagonal surface of the box body. One end of the cross plate is fixedly connected to the inner side wall of the box body, and a side gap is arranged between the other end of the cross plate and the other inner side wall of the box body. A transverse gap is arranged between the upper and lower adjacent cross plates. During use, when the noise passes through the primary sound absorption and spreads to the lower and upper parts of the box body, the noise flowing into the upper part of the box body will be weakened by the cover body sound-absorbing part. The noise flowing into the lower part of the box body is guided by the plurality of cross plates and circulates around the lower part of the box body. The noise is weakened during the process of circulating through the plurality of side gaps and plurality of transverse gaps, achieving secondary sound absorption and weakening.

[0007] Further, the three - stage sound - proofing component includes a plurality of rectangular channels opened on the side wall of the box body, and a folding plate is fixedly arranged inside the rectangular channels. The folding plate includes a first inner inclined plate, a second inner inclined plate, a first outer inclined plate and a second outer inclined plate. The tail end of the first inner inclined plate is fixedly connected to the head end of the first outer inclined plate, the tail end of the first outer inclined plate is fixedly connected to the head end of the second inner inclined plate, and the tail end of the second inner inclined plate is fixedly connected to the head end of the second outer inclined plate. A plurality of support rods are fixedly arranged on the inner bottom surface of the rectangular channel, and the upper ends of the support rods are fixedly connected to the lower surface of the folding plate. After the noise weakened by the first - stage sound - proofing component flows out of the inner box, a part of the noise diffuses to the outside of the box body through the rectangular channel. At this time, this part of the noise is weakened inside the rectangular channel. When in use, the noise is guided by the folding plate to pass through the rectangular channel, and under the repeated guiding action of the folding plate, the noise is weakened.

[0008] Further, the cover sound - proofing part includes a plurality of vertical plates fixedly connected to the lower surface of the box cover and extending downward, and a cover gap is arranged between adjacent vertical plates. An inclined hole communicating with the outside of the box cover is arranged inside the cover gap. The box cover is hexagonal, and a cover support ear is fixedly connected to the side wall of the box cover. A threaded hole is opened on the plate surface of the cover support ear. A box support ear opposite to the cover support ear is fixedly arranged on the upper - end side wall of the box body, and a strip - shaped hole corresponding to the threaded hole is arranged on the plate surface of the box support ear. When in use, the part of the noise flowing into the upper part of the box body after being weakened by the first - stage sound - proofing component is first blocked by the plurality of vertical plates and weakened, and then diffuses outward through the inclined hole. During the process of the noise passing through the inclined hole, the noise is weakened and reduced by the inclined surface of the inclined hole.

[0009] Further, the fixing component includes a first side plate and a second side plate fixedly connected to the side wall of the box body, and the first side plate and the second side plate are arranged corresponding to each other. A plurality of connection holes are opened on the plate surfaces of the first side plate and the second side plate, and bolts or screws are passed through the connection holes for fixing the box body. When in use, if encountering a power equipment with a sound - emitting pipeline, the box body is fixed on the wall through the fixing component, so that the sound - emitting pipeline is communicated with the docking port of the box body, and the noise emitted by the power equipment flows into the box body through the sound - emitting pipeline and is weakened by sound - proofing.

[0010] Further, the docking hole is rectangular, the inner box is cuboid - shaped, the inner box has no outer side - wall structure, and the outer end of the inner box is fixedly connected to the inner side wall of the box body and corresponds to the docking hole. A sound - insulation layer is arranged inside the side wall of the box body, and the inside of the sound - insulation layer is filled with sound - insulation cotton. The sound - insulation cotton is one or a combination of two or more of polyester fiber cotton, centrifugal glass wool, rock wool or mineral wool. There are a large number of tiny and connected pores inside the sound - insulation cotton material. Sound waves can penetrate deep into the material along these pores and convert sound energy into heat energy through friction with the material, realizing the weakening of noise.

[0011] Advantages of the present invention: The sound - generating device is installed at the docking port position of the box body, so that the noise emitted by the sound - generating device is transmitted outward after passing through the box body. During the process of the noise passing through the box body, the noise is weakened by the primary sound - absorbing component, secondary sound - absorbing component, tertiary sound - absorbing component and cover sound - absorbing part inside the box body, reducing the noise emitted by the power equipment inside the substation or converter station. The noise emitted by the power equipment is transmitted into the inner box through the docking port. Inside the inner box, the noise drives the soft cotton balls to move, and during the movement of the soft cotton balls, the noise is offset, weakening the noise, completing the first - stage noise reduction. Then, the noise weakened by passing through the second through - hole flows into the interior of the box body for continuous weakening. When the noise passes through the primary sound - absorption and reaches the lower and upper parts of the box body, the noise flowing into the upper part of the box body will be weakened by the cover sound - absorbing part, and the noise flowing into the lower part of the box body will flow around in the lower part of the box body under the diversion of multiple cross - plates. The noise is weakened during the process of flowing around through multiple side gaps and multiple cross - gaps, achieving secondary sound - absorption weakening. After the noise weakened by the primary sound - absorbing component flows out of the inner box, a part of the noise diffuses to the outside of the box body through the rectangular channel. At this time, this part of the noise is weakened inside the rectangular channel. When in use, the noise is guided by the folding plate through the rectangular channel, and under the repeated guiding action of the folding plate, the noise is weakened. If there is a power equipment with a sound - generating pipeline, the box body is fixed to the wall through the fixing component, so that the sound - generating pipeline is connected to the docking port of the box body, and the noise emitted by the power equipment flows into the box body through the sound - generating pipeline and is weakened by sound absorption. Brief Description of the Drawings

[0012] Figure 1 is the front - view structural schematic diagram of the present invention; Figure 2 is of the present invention Figure 1 enlarged view of A therein; Figure 3 is the top - view structural schematic diagram of the present invention; Figure 4 is the right - view structural schematic diagram of the present invention; Figure 5 is of the present invention Figure 4 enlarged view of B therein; Figure 6 is the top - view three - dimensional structural schematic diagram of the present invention; Figure 7 is the bottom - view three - dimensional structural schematic diagram of the present invention; Figure 8 is the rear - view three - dimensional structural schematic diagram of the present invention; Figure 9 is the bottom - view structural schematic diagram of the box cover of the present invention; Figure 10 is the cross - section three - dimensional structural schematic diagram of the box body of the present invention.

[0013] In the figure: 1. Box body; 2. Box cover; 3. Docking port; 4. Inner box; 5. Intermediate plate; 6. First through hole; 7. Second through hole; 8. Soft cotton ball; 9. Cross plate; 10. Side gap; 11. Horizontal gap; 12. Rectangular channel; 13. Folding plate; 14. First inner inclined plate; 15. First outer inclined plate; 16. Second inner inclined plate; 17. Second outer inclined plate; 18. Support rod; 19. Vertical plate; 20. Cover gap; 21. Oblique hole; 22. Cover support ear; 23. Threaded hole; 24. Box support ear; 25. First side plate; 26. Second side plate; 27. Sound insulation layer. Detailed implementation mode

[0014] The following further describes the present invention in detail with reference to the accompanying drawings. It should be noted that all the azimuth terms such as up, down, front, back, left, and right in the present invention do not limit the present invention, but are only used to more clearly illustrate and explain the present invention. Embodiment

[0015] As Figure 1-10 shown, this embodiment discloses a noise and vibration control device for a substation converter station, which includes a box body 1. The box body 1 is a hexagonal cylinder without bottom surfaces at the upper and lower ends. The upper end of the box body 1 is detachably and fixedly connected with a box cover 2. A docking port 3 is provided on the side wall of the box body 1. An inner box 4 is fixedly arranged inside the box body 1. A primary sound absorption component is arranged inside the inner box 4. A secondary sound absorption component is arranged below the inner box 4 inside the box body 1. A tertiary sound absorption component is arranged on the side wall of the box body 1. A cover sound absorption part is arranged inside the box cover 2. A fixing component for fixing the box body 1 is arranged on the side wall of the box body 1. During use, the sound-emitting device is installed at the docking port 3 position of the box body 1, so that the noise emitted by the sound-emitting device is transmitted outward after passing through the box body 1. During the process of the noise passing through the box body 1, the noise is weakened by the primary sound absorption component, secondary sound absorption component, tertiary sound absorption component and cover sound absorption part inside the box body 1, reducing the noise emitted by the power equipment inside the substation or converter station. Embodiment

[0016] As Figure 1-10As shown in the figure, this embodiment discloses a noise and vibration control device for a substation converter station, which includes a box body 1. The box body 1 is a hexagonal cylinder without bottom surfaces at the upper and lower ends. A box cover 2 is detachably and fixedly connected to the upper end of the box body 1. An interface 3 is provided on the side wall of the box body 1. An inner box 4 is fixedly arranged inside the box body 1. A primary sound-absorbing component is arranged inside the inner box 4. A secondary sound-absorbing component is arranged below the inner box 4 inside the box body 1. A tertiary sound-absorbing component is arranged on the side wall of the box body 1. A cover sound-absorbing part is arranged inside the box cover 2. A fixing component for fixing the box body 1 is arranged on the side wall of the box body 1. When in use, the sound-emitting device is installed at the position of the interface 3 of the box body 1, so that the noise emitted by the sound-emitting device is transmitted outward after passing through the box body 1. During the process of the noise passing through the box body 1, the noise is weakened by the primary sound-absorbing component, secondary sound-absorbing component, tertiary sound-absorbing component and cover sound-absorbing part inside the box body 1, reducing the noise emitted by the power equipment inside the substation or converter station.

[0017] For better effect, the primary sound-absorbing component includes an intermediate plate 5 fixedly arranged inside the inner box 4. A plurality of first through holes 6 are formed on the plate surface of the intermediate plate 5. A plurality of second through holes 7 are formed on the plate surface of the inner bottom plate of the inner box 4. A plurality of soft cotton balls 8 are arranged between the inner bottom plate and the intermediate plate 5, and the diameter of the soft cotton balls 8 is larger than the diameter of the first through holes 6, and the diameter of the soft cotton balls 8 is larger than the diameter of the second through holes 7. When in use, the noise emitted by the power equipment is transmitted into the inner box 4 through the interface 3. Inside the inner box 4, the noise drives the soft cotton balls to move. During the movement of the soft cotton balls, the noise is offset, so that the noise is weakened, completing the first noise reduction. Then the noise weakened by the second through holes 7 flows into the inside of the box body 1 for continuous weakening.

[0018] For better effect, the secondary sound-absorbing component includes a plurality of cross plates 9 fixedly connected to the inner side wall of the box body 1, and the plurality of cross plates 9 are respectively fixedly connected to different surfaces of the hexagonal surfaces of the box body 1. One end of the cross plate 9 is fixedly connected to the inner side wall of the box body 1, and a side gap 10 is arranged between the other end of the cross plate 9 and the other inner side wall of the box body 1. A cross gap 11 is arranged between the adjacent upper and lower cross plates 9. When in use, when the noise reaches the lower and upper parts of the box body 1 after primary sound absorption, the noise flowing into the upper part of the box body 1 will be weakened by the cover sound-absorbing part. The noise flowing into the lower part of the box body 1 is guided by the plurality of cross plates 9 to flow around in the lower part of the box body 1. The noise is weakened during the process of flowing around through the plurality of side gaps 10 and the plurality of cross gaps 11, achieving secondary sound absorption and weakening.

[0019] For better effect, the three - stage sound - damping component includes a plurality of rectangular channels 12 opened on the side wall of the box body 1, and a folding plate 13 is fixedly arranged inside the rectangular channel 12. The folding plate 13 includes a first inner inclined plate 14, a second inner inclined plate 16, a first outer inclined plate 15 and a second outer inclined plate 17. The tail end of the first inner inclined plate 14 is fixedly connected to the head end of the first outer inclined plate 15, the tail end of the first outer inclined plate 15 is fixedly connected to the head end of the second inner inclined plate 16, and the tail end of the second inner inclined plate 16 is fixedly connected to the head end of the second outer inclined plate 17. A plurality of support rods 18 are fixedly arranged on the inner bottom surface of the rectangular channel 12, and the upper end of the support rod 18 is fixedly connected to the lower surface of the folding plate 13. After the noise weakened by the first - stage sound - damping component flows out of the inner box 4, a part of the noise diffuses to the outside of the box body 1 through the rectangular channel 12. At this time, this part of the noise is weakened inside the rectangular channel 12. During use, the noise is guided by the folding plate 13 to pass through the rectangular channel 12, and under the repeated guiding action of the folding plate 13, the noise is weakened. Embodiment

[0020] As Figure 1-10 Shown in the figure, this embodiment discloses a noise and vibration control device for a substation converter station, which includes a box body 1. The box body 1 is a hexagonal cylinder without upper and lower bottom surfaces. The upper end of the box body 1 is detachably and fixedly connected with a box cover 2. An interface 3 is opened on the side wall of the box body 1. An inner box 4 is fixedly arranged inside the box body 1. A first - stage sound - damping component is arranged inside the inner box 4. A second - stage sound - damping component is arranged below the inner box 4 inside the box body 1. A third - stage sound - damping component is arranged on the side wall of the box body 1. A cover - body sound - damping part is arranged inside the box cover 2. A fixing component for fixing the box body 1 is arranged on the side wall of the box body 1. During use, the sound - generating device is installed at the position of the interface 3 of the box body 1, so that the noise generated by the sound - generating device is transmitted outward after passing through the box body 1. During the process of the noise passing through the box body 1, the noise is weakened by the first - stage sound - damping component, the second - stage sound - damping component, the third - stage sound - damping component and the cover - body sound - damping part inside the box body 1, reducing the noise generated by the power equipment inside the substation or converter station.

[0021] For better effect, the first - stage sound - damping component includes an intermediate plate 5 fixedly arranged inside the inner box 4. A plurality of first through - holes 6 are opened on the plate surface of the intermediate plate 5. A plurality of second through - holes 7 are opened on the plate surface of the inner bottom plate of the inner box 4. A plurality of soft cotton balls 8 are arranged between the inner bottom plate and the intermediate plate 5, and the diameter of the soft cotton ball 8 is larger than the diameter of the first through - hole 6, and the diameter of the soft cotton ball 8 is larger than the diameter of the second through - hole 7. During use, the noise generated by the power equipment is transmitted into the inner box 4 through the interface 3. Inside the inner box 4, the noise drives the soft cotton balls to move. During the movement of the soft cotton balls, the noise is offset, so that the noise is weakened, completing the first - stage noise reduction. Then the noise weakened by passing through the second through - holes 7 flows into the inside of the box body 1 for continuous weakening.

[0022] For better effect, the secondary sound insulation component includes a plurality of transverse plates 9 fixedly connected to the inner side wall of the box body 1, and the plurality of transverse plates 9 are respectively fixedly connected to different surfaces of the hexagonal surface of the box body 1. One end of the transverse plate 9 is fixedly connected to the inner side wall of the box body 1, and a side gap 10 is provided between the other end of the transverse plate 9 and the other inner side wall of the box body 1, and a transverse gap 11 is provided between the adjacent upper and lower transverse plates 9. During use, when the noise passes through the primary sound insulation and reaches the lower and upper parts of the box body 1, the noise flowing into the upper part of the box body 1 will be weakened by the cover sound insulation part. The noise flowing into the lower part of the box body 1 circulates around the lower part of the box body 1 under the guidance of the plurality of transverse plates 9. The noise is weakened during the process of circulating around the plurality of side gaps 10 and the plurality of transverse gaps 11, obtaining secondary sound insulation weakening.

[0023] For better effect, the tertiary sound insulation component includes a plurality of rectangular channels 12 opened on the side wall of the box body 1, and a folding plate 13 is fixedly arranged inside the rectangular channel 12. The folding plate 13 includes a first inner inclined plate 14, a second inner inclined plate 16, a first outer inclined plate 15 and a second outer inclined plate 17. The tail end of the first inner inclined plate 14 is fixedly connected to the head end of the first outer inclined plate 15, the tail end of the first outer inclined plate 15 is fixedly connected to the head end of the second inner inclined plate 16, and the tail end of the second inner inclined plate 16 is fixedly connected to the head end of the second outer inclined plate 17. A plurality of support rods 18 are fixedly arranged on the inner bottom surface of the rectangular channel 12, and the upper end of the support rod 18 is fixedly connected to the lower surface of the folding plate 13. After the noise weakened by the primary sound insulation component flows out of the inner box 4, a part of the noise diffuses to the outside of the box body 1 through the rectangular channel 12. At this time, this part of the noise is weakened inside the rectangular channel 12. During use, the noise is guided by the folding plate 13 to pass through the rectangular channel 12, and under the repeated guiding action of the folding plate 13, the noise is weakened.

[0024] For better effect, the cover sound insulation part includes a plurality of vertical plates 19 fixedly connected to the lower surface of the box cover 2 and extending downward, and a cover gap 20 is provided between the adjacent vertical plates 19. An inclined hole 21 communicating with the outside of the box cover 2 is arranged inside the cover gap 20. The box cover 2 is hexagonal, and a cover support ear 22 is fixedly connected to the side wall of the box cover 2. A threaded hole 23 is opened on the plate surface of the cover support ear 22. A box support ear 24 opposite to the cover support ear 22 is fixedly arranged on the upper end side wall of the box body 1, and a strip hole corresponding to the threaded hole 23 is arranged on the plate surface of the box support ear 24. During use, the part of the noise flowing into the upper part of the box body 1 after being weakened by the primary sound insulation component is first weakened by being blocked by the plurality of vertical plates 19, and then diffuses outward through the inclined hole 21. During the process of the noise passing through the inclined hole 21, the noise is weakened and reduced by the inclined surface of the inclined hole 21.

[0025] For better effect, the fixing component includes a first side plate 25 and a second side plate 26 fixedly connected to the side wall of the box body 1, and the first side plate 25 and the second side plate 26 are arranged corresponding to each other. A plurality of connection holes are formed in the plate surfaces of the first side plate 25 and the second side plate 26, and bolts or screws are passed through the connection holes for fixing the box body 1. During use, when encountering a power device with a sound generating pipe, the box body 1 is fixed to the wall through the fixing component, so that the sound generating pipe is communicated with the butt joint port 3 of the box body 1, and the noise emitted by the power device flows into the box body 1 through the sound generating pipe and is silenced and weakened.

[0026] For better effect, the butt joint hole is rectangular, the inner box 4 is cuboid-shaped, the inner box 4 has no outer side wall structure, the outer end of the inner box 4 is fixedly connected to the inner side wall of the box body 1 and corresponds to the butt joint hole. A sound insulation layer 27 is arranged inside the side wall of the box body 1, and the inside of the sound insulation layer 27 is filled with sound insulation cotton, and the sound insulation cotton adopts one or more combinations of polyester fiber cotton, centrifugal glass wool, rock wool or mineral wool. There are a large number of tiny and connected pores inside the sound insulation cotton material. Sound waves can penetrate deep into the material along these pores and generate friction with the material to convert sound energy into heat energy, realizing the weakening of noise.

[0027] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its concept of the present invention, makes equivalent replacements or changes, and should be covered within the protection scope of the present invention.

Claims

1. A noise and vibration control device for a transformer substation converter station, comprising a box body, wherein the box body is a hexagonal cylinder, and the box body has no bottom surface above and below, and is characterized in that: The upper end of the box body is detachably fixedly connected with a box cover, the side wall of the box body is provided with a docking port, the interior of the box body is fixedly provided with an inner box, the interior of the inner box is provided with a first-stage silencer assembly, the interior of the box body and below the inner box is provided with a second-stage silencer assembly, the side wall of the box body is provided with a third-stage silencer assembly, the interior of the box cover is provided with a cover silencer portion, and the side wall of the box body is provided with a fixing assembly for fixing the box body.

2. The noise and vibration control device for a transformer substation and converter station according to claim 1, characterized in that: The first-level silencer assembly includes an intermediate plate fixedly arranged inside the inner box, a plurality of first through holes are opened on the plate surface of the intermediate plate, a plurality of second through holes are opened on the plate surface of the inner bottom plate of the inner box, a plurality of soft balls are arranged between the inner bottom plate and the intermediate plate, and the diameter of the soft balls is larger than the diameter of the first through holes, and the diameter of the soft balls is larger than the diameter of the second through holes.

3. The noise and vibration control device for a transformer substation and converter station according to claim 1, characterized in that: The secondary silencer assembly includes a plurality of transverse plates fixedly connected to the inner wall of the box body, and the plurality of transverse plates are respectively fixedly connected to different surfaces of the hexagonal surface of the box body, one end of the transverse plate is fixedly connected to the inner wall of the box body, a side gap is provided between the other end of the transverse plate and the other inner wall of the box body, and a transverse gap is provided between the upper and lower adjacent transverse plates.

4. The noise and vibration control device for a transformer substation and converter station according to claim 1, characterized in that: The three-stage silencer assembly includes a plurality of rectangular channels opened on the side wall of the box body, and a folding plate is fixedly arranged inside the rectangular channels, and the folding plates include a first inner inclined plate, a second inner inclined plate, a first outer inclined plate, and a second outer inclined plate, and the tail end of the first inner inclined plate is fixedly connected to the head end of the first outer inclined plate, the tail end of the first outer inclined plate is fixedly connected to the head end of the second inner inclined plate, and the tail end of the second inner inclined plate is fixedly connected to the head end of the second outer inclined plate; a plurality of support rods are fixedly arranged on the inner bottom surface of the rectangular channel, and the upper ends of the support rods are fixedly connected to the lower surface of the folding plate.

5. The noise and vibration control device for a transformer substation and converter station according to claim 1, characterized in that: The cover body silencer portion includes a plurality of vertical plates fixedly connected to the lower surface of the box cover and extending downward, and a cover gap is provided between adjacent vertical plates, and an inclined hole connected to the outside of the box cover is provided inside the cover gap; the box cover is hexagonal, and a cover support ear is fixedly connected to the side wall of the box cover, and a threaded hole is provided on the plate surface of the cover support ear; a box support ear opposite to the cover support ear is fixedly provided on the upper end side wall of the box body, and a strip hole corresponding to the threaded hole is provided on the plate surface of the box support ear.

6. The noise and vibration control device for a transformer substation and converter station according to claim 1, characterized in that: The fixing assembly includes a first side plate and a second side plate fixedly connected to the side wall of the box body, and the first side plate is arranged corresponding to the second side plate. The plate surfaces of the first side plate and the second side plate are both provided with a plurality of connecting holes, and bolts or screws are passed through the connecting holes for fixing the box body.

7. The noise and vibration control device for a transformer substation and converter station according to claim 1, characterized in that: A sound insulation layer is arranged inside the side wall of the box body, and the inside of the sound insulation layer is filled with sound insulation cotton. The sound insulation cotton is made of one or a combination of two or more of polyester fiber cotton, centrifugal glass wool, rock wool or mineral wool.

8. The noise and vibration control device for a transformer substation and converter station according to claim 1, characterized in that: The docking hole is rectangular, the inner box is a cuboid, the inner box is a structure without an outer wall, and the outer end of the inner box is fixedly connected to the inner wall of the box body and corresponds to the docking hole.

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