Sound insulation barrier for transformer or converter transformer and sound insulation transformer or converter transformer

Abstract

The invention relates to the field of transformer substations and converter stations, discloses a sound insulation barrier for a transformer or a converter transformer and the sound insulation transformer or the converter transformer, and can effectively reduce low-frequency noise generated in the working process of the transformer or the converter transformer. The sound insulation barrier comprises a steel stand column and a plurality of photovoltaic sound absorption and insulation components. The photovoltaic sound absorption and insulation component comprises a photovoltaic assembly, a first sound absorption panel, two fixed side plates and two fixed bottom plates. The photovoltaic assembly is a transparent screen body which converts light energy into electric energy and is perpendicular to the ground, the two sides of the short edge are connected with the fixed side plates, and the two sides of the long edge are connected with the fixed bottom plate. The first sound absorption panel is parallel to the photovoltaic module and is connected with the fixed side plate and the fixed bottom plate, and the first sound absorption panel is a transparent micro-perforated plate. The photovoltaic module, the first sound absorption panel, the fixed side plate and the fixed bottom plate are enclosed into a whole, and a sound absorption resonant cavity is formed in the whole. The photovoltaic sound absorption and insulation components are stacked between the steel stand columns in the longitudinal direction of the steel stand columns till the photovoltaic sound absorption and insulation components are basically flush with the upper ends of the steel stand columns.

Description

Technical Field

[0001] The present application relates to the field of substations and converter stations, and in particular to a sound insulation barrier for transformers or converter transformers and a sound insulation transformer or converter transformer. Background Art

[0002] The "photovoltaic +" model not only has good economic benefits, but also has the characteristics of zero noise, zero pollution, and zero emissions, making it an excellent energy solution for many social public areas such as transportation and energy.

[0003] my country's power industry is developing rapidly, and urban power load continues to rise. The number of new and expanded power facilities such as substations and converter stations is increasing. Studies have shown that the peak of transformer and converter noise frequency mainly appears at 100Hz and its harmonic frequency in the range of 0-500Hz (when it is greater than 500Hz, the band noise value shows a downward trend), which is low-frequency noise. Low-frequency noise pollution is an environmental issue that focuses on the construction of power transmission and transformation projects, and it is also an environmental contradiction that needs to be urgently resolved in the construction of the national power industry. As an important noise reduction measure in the power sector, sound barriers are widely used in scenes such as substations and converter stations, and are often combined with facilities such as soundproof covers, station buildings and factory boundary walls. With the development of the "photovoltaic +" model, some institutions in the market are currently studying the combination of photovoltaics and sound barriers, but the research is basically concentrated in the field of transportation and highways, and related research and applications in the power industry have not yet been effectively carried out.

[0004] There are often observation windows on the sound barriers of outdoor substations, which are convenient for inspectors to observe the operating conditions of the power equipment inside the screen. However, the observation window is small and can only observe part of the equipment. For this reason, it is necessary to make the sound barrier have good observation functions while meeting the requirements of noise reduction, so that inspectors can conduct comprehensive observations, understand the operating conditions of the equipment, and perform maintenance and repairs in a timely manner. Similarly, this type of sound barrier is also suitable for other power facility scenarios such as converter stations and power plants.

[0005] For the above-mentioned photovoltaic modules, existing implementation solutions are usually concentrated in the field of transportation roads, and are designed specifically according to the characteristics of road noise and the needs of the road field. However, related research and applications in the power industry have not yet been effectively carried out. Summary of the invention

[0006] The purpose of the present application is to provide a sound insulation barrier for a transformer or a converter transformer and a sound insulation transformer or a converter transformer, which can effectively reduce the low-frequency noise generated during the operation of the transformer or the converter transformer. The sound insulation barrier has a power generation function, can achieve self-sufficiency and consumption of electricity in the station, and the screen body is transparent, which is convenient for power inspection personnel to observe the operating conditions of the power equipment inside the screen body.

[0007] The application discloses a sound insulation barrier for a transformer or a converter transformer, comprising: a steel column (1), a plurality of photovoltaic sound absorption and insulation components;

[0008] The photovoltaic sound-absorbing and insulating component comprises a photovoltaic module (21), a first sound-absorbing panel (22), two fixed side panels (23) and two fixed bottom panels (28); the photovoltaic module (21) is a transparent screen configured to convert light energy into electrical energy and is perpendicular to the ground; both sides of the photovoltaic module (21) are connected to the fixed side panels (23); and the upper end and the lower end of the photovoltaic module (21) are connected to the fixed bottom panels (28);

[0009] The first sound absorbing panel (22) is parallel to the photovoltaic module (21), two sides of the first sound absorbing panel (22) are respectively connected to the fixed side panels (23), the upper end and the lower end of the first sound absorbing panel (22) are both connected to the fixed bottom plate (28), and the first sound absorbing panel (22) is a transparent micro-perforated plate;

[0010] The photovoltaic assembly (21), the first sound absorbing panel (22), the fixed side panel (23) and the fixed bottom plate (28) are enclosed as a whole, and a sound absorbing resonance cavity (24) is formed inside. The plurality of photovoltaic sound absorbing and insulating components are stacked between the steel columns (1) along the longitudinal direction of the steel columns (1) until they are substantially flush with the upper ends of the steel columns (1).

[0011] In a preferred embodiment, it also includes an observation window component;

[0012] The observation window component has the same structure as the photovoltaic sound absorption and insulation component, comprising a transparent observation panel (25), the photovoltaic module (21), two fixed side panels (23) and two fixed bottom panels (28); the transparent observation panel (25) is perpendicular to the ground and parallel to the photovoltaic module (21); both sides of the transparent observation panel (25) are connected to the fixed side panels (23) respectively; and the upper end and the lower end of the transparent observation panel (25) are connected to the fixed bottom panel (28).

[0013] In a preferred example, the plurality of photovoltaic sound absorption and insulation components, and the photovoltaic sound absorption and insulation component and the observation window component are sealed by sealing gaskets.

[0014] In a preferred example, the second sound absorbing panel (26) is further included. The second sound absorbing panel (26) is a transparent micro-perforated panel. The second sound absorbing panel (26) is arranged perpendicular to the ground in the sound absorbing resonance cavity (24). A first resonance cavity is formed between the first sound absorbing panel (22) and the second sound absorbing panel (26). A second resonance cavity is formed between the second sound absorbing panel (26) and the photovoltaic module (21). The distance between the second sound absorbing panel (26) and the first sound absorbing panel (22) is 120 mm-130 mm, and the distance between the second sound absorbing panel (26) and the photovoltaic module (21) is 60 mm-70 mm.

[0015] A slit (27) is provided between the bottom of the first sound absorbing panel (22) and the second sound absorbing panel (26) and the fixed bottom plate (28), and the slit (27) is configured to communicate with the sound absorbing resonance cavity (24) to form a slit resonance sound absorbing structure;

[0016] The resonant sound absorbing structure formed by the first sound absorbing panel (22), the slit (27) and the first resonant cavity has a frequency designed at 400 Hz and is used to absorb low-frequency noise of 400 Hz. The resonant sound absorbing structure formed by the second sound absorbing panel (26), the slit (27) and the second resonant cavity has a frequency designed at 200 Hz and is used to absorb low-frequency noise of 200 Hz.

[0017] In a preferred example, the observation window component is arranged between two of the photovoltaic sound absorption and insulation components, the center of the observation window component is 1.5m-2.25m away from the ground, the photovoltaic sound absorption and insulation component is 1m-1.5m high and 1.5m-2m long.

[0018] In a preferred embodiment, the first sound absorbing panel (22) and the second sound absorbing panel (26) are PC panels, acrylic panels or tempered glass;

[0019] The photovoltaic module (21) is cadmium telluride power generation glass, and its light transmittance is not less than 40%.

[0020] In a preferred example, except for the observation window component, other photovoltaic components (21) in the photovoltaic sound absorption and insulation component are crystalline silicon cells.

[0021] In a preferred example, the first sound absorbing panel (22) is placed on the sound source side, and the photovoltaic module (21) is placed on the sound receiving point side.

[0022] In a preferred example, the thickness of the first sound absorbing panel (22) is 0.8 mm-1.5 mm, and the thickness of the second sound absorbing panel (26) is 2 mm-3 mm; the perforation rate of the first sound absorbing panel (22) is 0.5%-1.5%, the micropore diameter of the first sound absorbing panel (22) is 0.4 mm-0.8 mm, the perforation rate of the second sound absorbing panel (26) is 5‰-9‰, and the micropore diameter of the second sound absorbing panel (26) is 1 mm-1.5 mm; the slit (27) has a slit width of 0.5 mm-2 mm; the micropores are oblique perforations, which are perforated obliquely downward from the side of the transparent micro-perforated plate facing the photovoltaic module toward the sound source side.

[0023] In a preferred example, a column foot (3) is provided at the bottom of the steel column (1), a photovoltaic cable duct is provided inside the steel column (1), the cross-section of the steel column (1) is I-shaped, and a sealing top plate (4) is provided at the upper end of the sound insulation barrier, and the sealing top plate (4) is configured to seal the steel column (1) and the photovoltaic sound absorption and insulation component that is basically flush with the steel column (1).

[0024] The present application also discloses a soundproof transformer or converter transformer, comprising a plurality of soundproof barriers for a transformer or converter transformer as described above, and a transformer or converter transformer, wherein the soundproof barriers are enclosed on the outside of the transformer or converter transformer;

[0025] Wherein, the sound insulation barrier including the observation window component is arranged in front of the transformer or converter transformer surface to be inspected.

[0026] In the implementation mode of this application, by combining photovoltaic with traditional sound barriers in the power field, low-frequency noise of power equipment can be effectively reduced while power generation can be carried out to achieve self-supply of power energy in the station, effectively promoting the development of substations and converter stations towards green planning and design, green construction and low-carbon operation;

[0027] Furthermore, the photovoltaic module screen is transparent, and its photovoltaic module uses cadmium telluride power generation glass, which is often used in building curtain walls and has good transparency, making it easier for power inspectors to observe the operation of equipment inside the barrier on a daily basis. At the same time, cadmium telluride power generation glass can absorb ultraviolet light in visible light, reduce ultraviolet light transmittance, and help delay the discoloration and aging of power equipment inside the screen body;

[0028] Furthermore, the sound-absorbing panel of the photovoltaic sound barrier is a micro-perforated plate with oblique perforations, which facilitates the timely and automatic outflow of precipitation or daily cleaning water entering the cavity; at the same time, the slit formed between the sound-absorbing panel and the fixed bottom plate also facilitates the timely outflow of precipitation or cleaning water entering the cavity.

[0029] Furthermore, the sound barrier adopts a double-layer sound-absorbing resonance structure. By designing the frequencies of the resonant sound-absorbing structure formed by the sound-absorbing panel, slits and resonance cavity to 200Hz and 400Hz respectively, the low-frequency noise at 200Hz and 400Hz generated by the transformer or converter can be efficiently absorbed.

[0030] A large number of technical features are recorded in the specification of this application, which are distributed in various technical solutions. If all possible combinations of technical features of this application (i.e., technical solutions) are to be listed, the specification will be too long. In order to avoid this problem, the various technical features disclosed in the above-mentioned invention content of this application, the various technical features disclosed in the various embodiments and examples below, and the various technical features disclosed in the accompanying drawings can be freely combined with each other to form various new technical solutions (these technical solutions are all deemed to have been recorded in this specification), unless the combination of such technical features is technically infeasible. For example, in one example, feature A+B+C is disclosed, and in another example, feature A+B+D+E is disclosed, and features C and D are equivalent technical means that play the same role. Technically, only one can be used, and it is impossible to use them at the same time. Feature E can be combined with feature C technically. Then, the solution of A+B+C+D should not be deemed to have been recorded because it is technically infeasible, and the solution of A+B+C+E should be deemed to have been recorded. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the exterior facade structure of the sound absorbing panel side (sound source side) according to one embodiment of the present application;

[0032] Figure 2 This is a schematic diagram of the external facade structure of a photovoltaic module side (sound receiving point side) according to an embodiment of the present application;

[0033] Figure 3 is a schematic diagram of a horizontal cross-sectional structure according to an embodiment of the present application;

[0034] Figure 4 A sectional top view of a photovoltaic sound-absorbing and sound-insulating component according to one embodiment of the present application;

[0035] Figure 5 is a cut-away top view of an observation window component according to one embodiment of the present application;

[0036] Figure 6 is a schematic diagram of a longitudinal cross-sectional structure according to an embodiment of the present application;

[0037] Figure 7 A schematic diagram of a sound insulation barrier structure with a slit resonance sound absorption structure according to an embodiment of the present application;

[0038] Figure 8 A schematic diagram of the longitudinal cross-sectional structure of a sound insulation barrier having a double-layer sound absorption and insulation structure and a slit resonance sound absorption structure according to one embodiment of the present application;

[0039] Fig. 9 It is a schematic diagram of the noise absorption effect according to one embodiment of the present application.

[0040] Description of reference numerals:

[0041] 1-steel column; 21-photovoltaic module; 22-first sound-absorbing panel; 23-fixed side panel; 24-sound-absorbing resonance cavity; 25-transparent observation panel; 26-second sound-absorbing panel; 27-slit; 28-fixed bottom plate; 3-column foot; 4-sealed top plate. DETAILED DESCRIPTION

[0042] In the following description, many technical details are provided to help readers better understand the present application. However, those skilled in the art can understand that the technical solution claimed in the present application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0043] Explanation of terminology:

[0044] As used herein, the terms "transformer" and "current converter" are used interchangeably.

[0045] The specific implementation of the present invention is described in detail below with reference to specific embodiments and drawings:

[0046] The first embodiment of the present application relates to a sound insulation barrier for a transformer or a converter, such as Figure 1 and Figure 2 As shown, the sound insulation barrier comprises: a steel column 1, a plurality of photovoltaic sound absorption and insulation components;

[0047] The photovoltaic sound-absorbing and sound-insulating component includes a photovoltaic module 21, a first sound-absorbing panel 22, two fixed side panels 23 and two fixed bottom panels 28. The photovoltaic module 21 is a transparent screen configured to convert light energy into electrical energy, which is perpendicular to the ground. The two sides of the short side of the photovoltaic module 21 are connected to the fixed side panels 23, and the two sides of the long side of the photovoltaic module 21 (i.e., the upper end and the lower end of the photovoltaic module 21) are connected to the fixed bottom panel 28.

[0048] The first sound absorbing panel 22 is parallel to the photovoltaic module 21, and both sides of the first sound absorbing panel 22 are connected to the fixed side panels 23 respectively, and the upper end and the lower end of the first sound absorbing panel 22 are connected to the fixed bottom plate 28. The first sound absorbing panel 22 is a transparent micro-perforated plate;

[0049] like Figure 3As shown, the photovoltaic module 21, the first sound absorbing panel 22, the fixed side panel 23 and the fixed bottom plate 28 are enclosed as a whole, and a sound absorbing resonance cavity 24 is formed inside. A plurality of photovoltaic sound absorbing and insulating components are stacked between the steel columns 1 along the longitudinal direction of the steel columns 1 until they are substantially flush with the upper ends of the steel columns 1.

[0050] In an optional embodiment, an observation window component may also be included. The observation window component has the same structure as the photovoltaic sound absorption and insulation component, including a transparent observation panel 25, a photovoltaic module 21, two fixed side panels 23 and two fixed bottom panels 28. The transparent observation panel 25 is perpendicular to the ground and parallel to the photovoltaic module 21. The two sides of the transparent observation panel 25 are respectively connected to the fixed side panels 23, and the upper and lower ends of the transparent observation panel (25) are both connected to the fixed bottom panels 28. The cross-sectional top view of the observation window component is shown in FIG. Figure 5 shown.

[0051] In an optional embodiment, a plurality of photovoltaic sound absorption and insulation components, and a photovoltaic sound absorption and insulation component and an observation window component are sealed by a sealing gasket.

[0052] In an optional embodiment, a second sound absorbing panel 26 is further included. The second sound absorbing panel 26 is a transparent micro-perforated plate. The second sound absorbing panel 26 is arranged perpendicular to the ground in the sound absorbing resonance cavity 24. A first resonance cavity is formed between the first sound absorbing panel 22 and the second sound absorbing panel 26. A second resonance cavity is formed between the second sound absorbing panel 26 and the photovoltaic module 21. The distance between the second sound absorbing panel 26 and the first sound absorbing panel 22 is 120mm-130mm, preferably 125mm, and the distance between the second sound absorbing panel 26 and the photovoltaic module 21 is 60mm-70mm, preferably 65mm. A slit 27 is provided between the bottom of the first sound absorbing panel 22 and the second sound absorbing panel 26 and the sealing gasket. The slit 27 is configured to be connected to the sound absorbing resonance cavity 24 to form a slit resonance sound absorbing structure.

[0053] Preferably, the resonant sound absorbing structure formed by the first sound absorbing panel 22, the slit 27 and the first resonance cavity has a frequency designed at 400 Hz for absorbing low-frequency noise of 400 Hz, and the resonant sound absorbing structure formed by the second sound absorbing panel 26, the slit 27 and the second resonance cavity has a frequency designed at 200 Hz for absorbing low-frequency noise of 200 Hz. Therefore, the structure combining the first sound absorbing panel 22, the second sound absorbing panel 26, the slit 27, the first resonance cavity and the second resonance cavity can efficiently absorb the low-frequency noise at 200 Hz and 400 Hz generated by the transformer or converter.

[0054] In an optional embodiment, the observation window component is arranged between two photovoltaic sound absorption and insulation components, the center of the observation window component is 1.5m-2.25m from the ground, the photovoltaic sound absorption and insulation component is 1m-1.5m high and 1.5m-2m long.

[0055] In an optional embodiment, the first sound absorbing panel 22 and the second sound absorbing panel 26 are PC boards, acrylic boards or tempered glass, and the photovoltaic module 21 is cadmium telluride power generation glass with a light transmittance of not less than 40%. Optionally, when the photovoltaic sound absorbing and insulating components do not need to meet the transparency condition, other photovoltaic modules 21 except the observation window components can also be crystalline silicon cells.

[0056] In an optional embodiment, the first sound absorbing panel 22 is placed on the sound source side, and the photovoltaic module 21 is placed on the sound receiving point side.

[0057] In an optional embodiment, the thickness of the first sound absorbing panel 22 is 0.8mm-1.5mm, preferably 1.2mm, and the thickness of the second sound absorbing panel 26 is 2mm-3mm, preferably 2.5mm. The perforation rate of the first sound absorbing panel 22 is 0.5%-1.5%, preferably 1%, and the micropore diameter of the first sound absorbing panel 22 is 0.4mm-0.8mm, preferably 0.6mm. The perforation rate of the second sound absorbing panel 26 is 5‰-9‰, preferably 7‰, and the micropore diameter of the second sound absorbing panel 26 is 1mm-1.5mm, preferably 1.3mm. The micropores are oblique perforations, which are perforated obliquely downward from the side of the transparent microperforated plate facing the photovoltaic module to the sound source side.

[0058] In an optional embodiment, a column foot 3 is provided at the bottom of the steel column 1, a photovoltaic cable duct is provided inside the steel column 1, the cross-section of the steel column 1 is I-shaped, and a sealing top plate 4 is provided at the upper end of the sound barrier. The sealing top plate 4 is configured to seal the steel column 1 and the photovoltaic sound absorption and insulation components that are basically flush with the steel column 1.

[0059] In an optional embodiment, multiple sound insulation barriers can be connected by left-right plug-in. For example, the photovoltaic sound absorption and insulation components and / or observation window assemblies of multiple horizontal sound insulation barriers can use steel columns as connecting parts and be horizontally inserted into the steel columns through the I-shaped grooves of the steel columns, thereby achieving the effect of enclosing the transformer or converter transformer in multiple sound insulation barriers.

[0060] The second embodiment of the present application relates to a soundproof transformer or converter transformer, characterized in that it includes a soundproof barrier for a transformer or converter transformer as described in the first embodiment of the present application, and a transformer or converter transformer. The soundproof barrier is enclosed on the outside of the transformer or converter transformer, and the soundproof screen including the observation window component is arranged in front of the transformer surface to be inspected.

[0061] In an optional embodiment, the sound insulation barrier surrounding the transformer or converter transformer may be provided with an inspection door, which may be consistent with the components of the sound insulation barrier. One side of the inspection door may be connected to the adjacent sound insulation barrier by a hinge, or may be connected to the adjacent sound insulation barrier by other means, such as a hinge connection.

[0062] In order to better understand the technical solution of the present application, several specific examples are provided below for illustration. The details listed in the multiple examples are mainly for ease of understanding and are not intended to limit the scope of protection of the present application.

[0063] Example 1

[0064] like Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the exterior structure of the first sound-absorbing panel 22 of the sound barrier on the sound source side. Figure 2 It is a schematic diagram of the external facade structure on the sound receiving point side of the photovoltaic module 21. The sound insulation barrier includes two steel columns 1, and a plurality of stacked photovoltaic sound-absorbing and insulating components are arranged between the two steel columns 1. The photovoltaic sound-absorbing and insulating components are an integrated structure formed by enclosing the photovoltaic module 21, the first sound-absorbing panel 22, two fixed side panels 23 and two fixed bottom panels 28, wherein the photovoltaic module 21 and the first sound-absorbing panel 22 are parallel to each other, and the two sides are respectively connected to the two fixed side panels 23 and the fixed bottom panel 28, and a sound-absorbing resonance cavity 24 is formed in the middle. The photovoltaic module 21 screen is transparent, and preferably uses cadmium telluride power generation glass with a light transmittance of not less than 40%. Under this parameter, the photovoltaic module 21 screen is transparent, which can make the operation of the power equipment in the barrier directly exposed to the field of vision of the power inspection personnel, and the photovoltaic module 21 absorbs sunlight and converts light energy into electrical energy. When the photovoltaic sound-absorbing and insulating components do not need to meet the transparent conditions, in addition to the observation window components, other photovoltaic modules 21 can also be crystalline silicon cells. The first sound absorbing panel 22 is a transparent micro-perforated plate with a porosity of no more than 10% and a perforation diameter of no more than 1 mm. The perforations are oblique perforations, which are obliquely perforated downward from the side of the first sound absorbing panel 22 facing the sound absorbing resonance cavity 24 to the sound source side, so that the cleaning water or precipitation in the cavity can automatically flow out along the oblique perforations. It is worth pointing out that when the power inspection personnel are not near the sound insulation barrier, the perforations on the inner side of the sound insulation barrier do not affect their normal observation.

[0065] Sealing pads are arranged between each photovoltaic sound-absorbing and insulating component and between the photovoltaic sound-absorbing and insulating component and the observation window component, so that the two components stacked up and down are kept sealed.

[0066] Low-frequency noise will be generated during the operation of the transformer or converter, and the peak of the noise frequency mainly appears at 100Hz and its harmonic frequencies (such as 200Hz, 300Hz, 400Hz and 500Hz). Among them, according to the field measured data, the peak of the converter noise frequency mainly appears at 200Hz and 400Hz. The transformer noise energy is concentrated on the peak frequency bands of 100Hz and 200Hz, and there are certain broadband noise characteristics in the frequency range of 300-500Hz. The transformer or converter is set on the inner side of the first sound absorption panel 22 of the sound insulation barrier, and the outer side of the photovoltaic module 21 of the sound insulation barrier is the walking observation area of ​​the power inspection personnel. The low-frequency noise emitted by the transformer or converter enters the sound absorption resonance cavity 24 through the micropores on the first sound absorption panel 22. When the frequency of the incident sound wave is equal to the natural frequency of the system, the air column in the micro-perforated hole neck vibrates violently due to resonance. During the vibration, the air column and the side wall of the hole neck rub to convert the sound energy into heat energy, thereby playing a role in sound absorption.

[0067] An observation window component is provided on the sound insulation barrier, and its center is 1.5m-2.25m from the ground. The structure of the observation window component is consistent with that of the photovoltaic sound insulation component, except that the first sound absorption panel 22 of the photovoltaic sound insulation component is replaced by a transparent observation panel 25. No holes are punched on the transparent observation panel. The power inspection personnel can observe whether the transformer or converter transformer inside the sound insulation barrier is working normally through the transparent observation window while walking. The first sound absorption panel 22 and the transparent observation panel 25 are made of the same material, which are PC board, acrylic board or tempered glass.

[0068] The bottom of the steel column 1 is provided with a column foot 3, and a photovoltaic cable trough is provided inside. The cross section of the steel column 1 is an I-shaped, and the photovoltaic module 21 screen is embeddedly connected with the steel column 1, and a sealing top plate 4 is provided on the top of the two. The connection between the components of the photovoltaic module 21 is sealed with a rubber sealing pad, which can enhance the sound insulation performance of the photovoltaic module 21.

[0069] Example 2

[0070] like Figure 7 As shown, Figure 7Schematic diagram of a sound barrier structure with a slit resonance sound absorption structure. The difference between Example 2 and Example 1 is that the bottom of the first sound absorption panel 22 and the photovoltaic module 21 of Example 1 are in close contact with the fixed bottom plate 28. In Example 2, there is a slit 27 between the bottom of the first sound absorption panel 22 and the photovoltaic module 21 and the fixed bottom plate 28. The slit 27 is connected to the sound absorption resonance cavity 24. When the transformer or the converter generates low-frequency noise, the noise enters the sound absorption resonance cavity 24 through the first sound absorption panel 22 and the slit 27. When the frequency of the incident sound wave is equal to the natural frequency of the system, the incident sound wave converts sound energy into heat energy through resonance with the air, thereby playing a role in sound absorption.

[0071] All features of Example 1 can be applied to this embodiment, and all features of this embodiment can also be applied to Example 1.

[0072] Example 3

[0073] like Figure 8 As shown, Figure 8 It is a schematic diagram of the longitudinal cross-sectional structure of a sound barrier having a double-layer sound absorption and insulation structure and a slit resonance structure. In this embodiment, a second sound absorption panel 26 is added to the sound absorption resonance cavity 24, so that the original sound absorption resonance cavity 24 is divided into a first sound absorption resonance cavity and a second sound absorption resonance cavity. The distance between the second sound absorption panel 26 and the first sound absorption panel 22 is 120mm-130mm, preferably 125mm, and the distance between the second sound absorption panel 26 and the photovoltaic module 21 is 60mm-70mm, preferably 65mm. All features of Example 1 and Example 2 can be applied to this embodiment, and all features of this embodiment can also be applied to Example 1 and Example 2.

[0074] The absorption of low-frequency noise has always been a difficult problem. Fig. 9 As shown, the advantage of this embodiment is that it has an extremely excellent absorption effect on low-frequency noise with a frequency of 200 Hz and 400 Hz, and the sound absorption coefficient is between 0.98-1, which can almost completely absorb the noise at the characteristic frequency peak of the low-frequency noise generated during the operation of the transformer or converter.

[0075] In summary, the present invention provides a sound insulation barrier for a transformer or a converter transformer and a sound insulation transformer or a sound insulation converter transformer, which can effectively reduce the low-frequency noise generated during the operation of the transformer or the converter transformer. The sound insulation barrier body has the function of power generation, and can achieve self-sufficiency and consumption of electricity in the station, which is convenient for inspection personnel to observe the operating conditions of the power equipment inside the barrier. At the same time, the photovoltaic modules can delay the discoloration and aging of the power equipment in the barrier body by absorbing ultraviolet light.

[0076] It should be noted that in the application documents of this patent, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one" do not exclude the existence of other identical elements in the process, method, article or device including the elements. In the application documents of this patent, if it is mentioned that an action is performed according to an element, it means that the action is performed at least according to the element, which includes two situations: performing the action only according to the element, and performing the action according to the element and other elements. Expressions such as multiple, multiple, and multiple include 2, 2 times, 2 kinds, and more than 2, more than 2 times, and more than 2 kinds.

[0077] All documents mentioned in this application are considered to be included in the disclosure of this application as a whole, so that they can be used as the basis for modification when necessary. In addition, it should be understood that after reading the above disclosure of this application, those skilled in the art can make various changes or modifications to this application, and these equivalent forms also fall within the scope of protection claimed in this application.

Claims

1. A sound insulation barrier for a transformer or a converter, characterized in that: include: Steel columns (1), multiple photovoltaic sound absorption and insulation components; The photovoltaic sound-absorbing and insulating component comprises a photovoltaic module (21), a first sound-absorbing panel (22), two fixed side panels (23) and two fixed bottom panels (28); the photovoltaic module (21) is a transparent screen configured to convert light energy into electrical energy and is perpendicular to the ground; both sides of the photovoltaic module (21) are connected to the fixed side panels (23); and the upper end and the lower end of the photovoltaic module (21) are connected to the fixed bottom panels (28); The first sound absorbing panel (22) is parallel to the photovoltaic module (21), two sides of the first sound absorbing panel (22) are connected to the fixed side panels (23), the upper end and the lower end of the first sound absorbing panel (22) are both connected to the fixed bottom plate (28), and the first sound absorbing panel (22) is a transparent micro-perforated plate; The photovoltaic assembly (21), the first sound absorbing panel (22), the fixed side panel (23) and the fixed bottom panel (28) are enclosed as a whole, and a sound absorbing resonance cavity (24) is formed inside. The plurality of photovoltaic sound absorbing and insulating components are stacked between the steel columns (1) along the longitudinal direction of the steel columns (1) until they are substantially flush with the upper ends of the steel columns (1).

2. The sound insulation barrier for transformers and / or converters according to claim 1, characterized in that: Also included is an observation window assembly; The observation window component has the same structure as the photovoltaic sound absorption and insulation component, comprising a transparent observation panel (25), the photovoltaic module (21), two fixed side panels (23) and two fixed bottom panels (28); the transparent observation panel (25) is perpendicular to the ground and parallel to the photovoltaic module (21); both sides of the transparent observation panel (25) are connected to the fixed side panels (23) respectively; and the upper end and the lower end of the transparent observation panel (25) are connected to the fixed bottom panel (28).

3. The sound insulation barrier for a transformer or converter according to claim 2, characterized in that: The photovoltaic sound absorption and insulation components are sealed between each other, and the photovoltaic sound absorption and insulation component and the observation window component are sealed by sealing gaskets.

4. The sound insulation barrier for a transformer or converter according to claim 3, characterized in that: The device further comprises a second sound absorbing panel (26), wherein the second sound absorbing panel (26) is a transparent micro-perforated panel, and the second sound absorbing panel (26) is arranged perpendicular to the ground in the sound absorbing resonance cavity (24); a first resonance cavity is formed between the first sound absorbing panel (22) and the second sound absorbing panel (26), and a second resonance cavity is formed between the second sound absorbing panel (26) and the photovoltaic module (21); the distance between the second sound absorbing panel (26) and the first sound absorbing panel (22) is 120 mm-130 mm, and the distance between the second sound absorbing panel (26) and the photovoltaic module (21) is 60 mm-70 mm; A slit (27) is provided between the bottom of the first sound absorbing panel (22) and the second sound absorbing panel (26) and the fixed bottom plate (28), and the slit (27) is configured to communicate with the sound absorbing resonance cavity (24) to form a slit resonance sound absorbing structure; The resonant sound absorbing structure formed by the first sound absorbing panel (22), the slit (27) and the first resonant cavity has a frequency designed at 400 Hz and is used to absorb low-frequency noise of 400 Hz. The resonant sound absorbing structure formed by the second sound absorbing panel (26), the slit (27) and the second resonant cavity has a frequency designed at 200 Hz and is used to absorb low-frequency noise of 200 Hz.

5. The sound insulation barrier for a transformer or converter according to claim 2, characterized in that: The observation window component is arranged between the two photovoltaic sound absorption and insulation components, the center of the observation window component is 1.5m-2.25m away from the ground, the photovoltaic sound absorption and insulation component is 1m-1.5m high and 1.5m-2m long.

6. The sound insulation barrier for a transformer or converter according to claim 4, characterized in that: The first sound absorbing panel (22) and the second sound absorbing panel (26) are PC panels, acrylic panels or tempered glass; The photovoltaic module (21) is cadmium telluride power generation glass, and its light transmittance is not less than 40%.

7. The sound insulation barrier for a transformer or converter according to claim 1, characterized in that: The first sound absorbing panel (22) is placed on the sound source side, and the photovoltaic module (21) is placed on the sound receiving point side.

8. The sound insulation barrier for a transformer or converter according to claim 4, characterized in that: The thickness of the first sound absorbing panel (22) is 0.8 mm to 1.5 mm, and the thickness of the second sound absorbing panel (26) is 2 mm to 3 mm; The perforation rate of the first sound absorbing panel (22) is 0.5%-1.5%, and the micropore diameter of the first sound absorbing panel (22) is 0.4mm-0.8mm; The perforation rate of the second sound absorbing panel (26) is 5‰-9‰, and the micropore diameter of the second sound absorbing panel (26) is 1mm-1.5mm; The slit (27) has a width of 0.5 mm to 2 mm; The micro holes are oblique perforations, which are perforated obliquely downward from the side of the transparent micro-perforated plate facing the photovoltaic module toward the sound source side.

9. The sound insulation barrier for a transformer or converter according to claim 1, characterized in that: The bottom of the steel column (1) is provided with a column foot (3), a photovoltaic cable duct is provided inside the steel column (1), the cross section of the steel column (1) is I-shaped, and a sealing top plate (4) is provided at the upper end of the sound insulation barrier, and the sealing top plate (4) is configured to seal the steel column (1) and the photovoltaic sound absorption and insulation component that is basically flush with the steel column (1).

10. A sound insulation transformer or a current converter, characterized in that: A method comprising a plurality of sound insulation barriers for a transformer or a converter transformer according to claims 1 to 9, and a transformer or a converter transformer, wherein the sound insulation barriers are enclosed on the outside of the transformer or the converter transformer; Wherein, the sound insulation barrier including the observation window component is arranged in front of the transformer or converter transformer that needs to be inspected.

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