CN106653286A - Noise reduction shell for American type box transformer - Google Patents

Abstract

The invention relates to a noise-reducing housing for an American-style box-type transformer, which includes a top sound-absorbing board, a left-side sound-absorbing board, a right-side sound-absorbing board, a rear-side sound-absorbing board, a front sound-absorbing louver, a metal base frame, and a rear-side sound-absorbing board. The lower part of the board is provided with a sound-absorbing air box, and the side of the top sound-absorbing plate close to the sound-absorbing air box is provided with a sound-absorbing air box, and the sound-absorbing air box is provided with a rain-proof cover above the end of the sound-absorbing plate at the top to prevent There is an exhaust gap between the rain cover and the end of the sound-absorbing plate on the top of the sound-absorbing air box. The sound-absorbing board, the sound-absorbing board on the rear side, and the front-side sound-absorbing louvers are combined to form a sound-absorbing shell that can convect with the outside air, and the sound-absorbing shell is seated on the metal base frame. The invention adopts the combination design of the sound-absorbing structure and the ventilation structure, and has the characteristics of noise reduction and good heat dissipation effect.

Description

A noise-reducing shell for an American box-type transformer

technical field

The invention relates to an American-style box-type transformer shell, in particular to a noise-reducing shell for an American-style box-type transformer that can effectively control noise, and belongs to the field of power box-type transformers.

Background technique

The noise-reducing shell for American-style box-type transformers is a common noise reduction device for American-style box-type transformers. It can effectively reduce the noise transmitted to the external environment when American-type box-type transformers are working. Having attention. At present, the existing noise-reducing housings, especially the noise-reducing housings for outdoor American-style box-type transformers usually have no obvious noise-reducing effect. When the American-style box-type transformer is running, the noise and vibration caused by the magnetic hysteresis of the iron core will be transmitted to the shell body through the base, so that the American-style box-type transformer will use noise reduction to become a new noise source, which indirectly increases the frequency of the American-type box-type transformer. At present, the commonly used method is to add sound-absorbing materials such as styrofoam or sound-absorbing cotton to reduce the noise, but the temperature rise problem of American-style box-type substations has not been effectively solved after installing the noise-reducing shell. The normal operation of the American box substation and the related operations of the staff will be adversely affected. Therefore, how to provide a housing with a better noise reduction effect and without affecting the temperature rise of the American box transformer is an important technical problem to be solved by those skilled in the art.

The patent document whose publication number is CN204204556U discloses a low-noise box variable housing, including a base, a top cover and a side wall. The surface of the shell is coated with anti-high temperature oxidation paint, the inner shell is covered with clearance holes, and a plurality of spring shock absorbers are arranged in the groove at the bottom of the base. There is also a dust box near the air filter on the top of the board, and an air knife is set in the top cover just above the dust box. The sound-absorbing layer is made of polyurethane hard foam, which can gradually attenuate the noise from the transformer room. While this solution reduces noise, it brings troublesome assembly and maintenance problems.

Contents of the invention

The present invention discloses a new scheme for the noise-reducing housing for American-style box-type transformers, and adopts the design of combining the sound-absorbing structure and the ventilation structure, which solves the problem that the noise-reducing effect of the existing American-style box-type transformer housing is not obvious, and the installation of the noise-reducing housing affects the device The problem of heat dissipation.

The noise-reduction housing for the American box-type transformer of the present invention comprises a top sound-absorbing plate, a left-side sound-absorbing plate, a right-side sound-absorbing plate, a rear-side sound-absorbing plate, a front sound-absorbing louver, and a metal base frame. There is a sound-absorbing intake box, and a sound-absorbing air box is provided on the side of the top sound-absorbing board close to the sound-absorbing air box, and a rain-proof cover is provided above the end of the sound-absorbing air box leading out of the top sound-absorbing plate, and the rain-proof cover is connected with the sound-absorbing There is an exhaust gap between one end of the air outlet box leading to the top of the sound-absorbing plate, and the front sound-absorbing louver includes the outer layer of the louver, the inner layer of the noise-reducing sound-absorbing plate, the sound-absorbing plate on the top, the sound-absorbing plate on the left, the sound-absorbing plate on the right, and the rear The sound-absorbing panels on the side and the front-side sound-absorbing louvers are combined to form a sound-absorbing shell that can convect with the outside air, and the sound-absorbing shell is seated on the metal base frame.

The noise-reducing housing for the American-style box-type substation of the present invention adopts a design combining a sound-absorbing structure and a ventilation structure, and has the characteristics of good noise-reducing and heat-dissipating effects.

Description of drawings

Figure 1 is a schematic front view of the noise-reduction housing for an American-style box-type transformer in this scheme.

Fig. 2 is a schematic top view of the noise reduction housing for the American-style box-type transformer in Fig. 1 .

Fig. 3 is a schematic left view of the noise-reducing housing for the American-style box-type transformer in Fig. 1 .

Fig. 4 is a structural schematic diagram of the sound absorbing plate.

Among them, 1 is the top silencing plate, 2 is the silencing air box, 3 is the left silencing plate, 4 is the right silencing plate, 5 is the rear silencing plate, 6 is the silencing air intake box, 7 is the front silencing Blinds, 8 is the metal base frame, 111 is the flame-retardant gypsum board A, 112 is the flame-retardant gypsum board B, 121 is the sound-absorbing non-woven fabric A, 122 is the sound-absorbing non-woven fabric B, 131 is the flame-retardant sound-absorbing hole plate A, 132 140 is a sound-absorbing cotton layer, 141 is an I-shaped keel, and 151 is a stainless steel metal panel A.

detailed description

The present invention will be further described below in conjunction with accompanying drawing.

As shown in Figures 1 to 3, the schematic diagrams of the noise-reduction housing for the American-style box-type transformer of the present invention are shown. The noise-reduction housing for American-style box-type substations includes top sound-absorbing plates, left-side sound-absorbing plates, right-side sound-absorbing plates, rear sound-absorbing plates, front sound-absorbing louvers, and a metal base frame. The air intake box, the side of the top sound-absorbing plate close to the sound-absorbing air box is provided with a sound-absorbing air box, and the sound-absorbing air box leads out of the top end of the sound-absorbing plate, and a rain-proof cover is provided above the rain-proof cover and the sound-absorbing air box There is an exhaust gap between one end of the sound-absorbing plate leading to the top. The front sound-absorbing louver includes the outer layer of the louver, the inner layer of the noise-reducing sound-absorbing plate, the sound-absorbing plate on the top, the sound-absorbing plate on the left, the sound-absorbing plate on the right, and the sound-absorbing plate on the rear side. The combination of the sound-absorbing board and the front sound-absorbing louvers forms a sound-absorbing shell that can convect with the outside air, and the sound-absorbing shell is seated on the metal base frame. This solution effectively reduces the pollution of noise to the surrounding environment. The sound-absorbing air intake box and the sound-absorbing air box cooperate to form a special air flow channel, which ensures the normal convection of the air and ensures that the noise does not leak through the air inlet and outlet air boxes. Ventilation and heat dissipation problems and noise leakage problems of the casing for American-style box-type transformers.

In order to further reduce the vibration noise generated by the operation of the equipment and the noise generated by the action of external factors on the box body, the noise reduction housing of this solution has also been improved. In order to prevent the base from transmitting the noise generated by the operation of the equipment to the shell, a sound-absorbing rubber pad is provided between the sound-absorbing shell and the metal base frame, and the sound-absorbing rubber pad prevents the metal base frame from transmitting noise to the sound-absorbing shell. In order to avoid the impact of falling water on the shell under extreme weather conditions, a weather-resistant rubber layer is pasted on the outside of the top sound-absorbing plate, and a weather-resistant rubber layer is pasted on the outside of the top of the rainproof cover. The weather-resistant rubber layer eliminates the effect of external factors on the sound-absorbing shell Noise generated at the top.

As shown in Figure 4, the structure schematic diagram of the sound-absorbing plate of this scheme. The sound-absorbing board includes flame-retardant gypsum board A, sound-absorbing non-woven fabric A, flame-retardant sound-absorbing orifice A, sound-absorbing cotton layer, flame-retardant sound-absorbing hole B, sound-absorbing non-woven B, flame-retardant gypsum board B, and Combustible gypsum board A, sound-absorbing non-woven fabric A, flame-retardant sound-absorbing orifice plate A, sound-absorbing cotton layer, flame-retardant sound-absorbing orifice B, sound-absorbing non-woven fabric B, and flame-retardant gypsum board B are tightly pressed to form a composite noise-reducing sound-absorbing panel as a whole . This scheme can adopt the way of bonding and pressing, and can also use the way of bolts and studs to connect the above layers tightly. The above-mentioned composite sound-absorbing plate is applied to the casing of the American box substation, which effectively solves the problem of noise reduction and noise reduction of the casing. At the same time, as an integral composite plate, it is more convenient to assemble, disassemble and maintain.

In order to enhance the overall structural strength of the composite sound-absorbing panel and make the core not easy to deform, this scheme adds a combined keel structure inside the composite panel, as shown in Figure 4, that is, there are several regularly arranged I-shaped sound-absorbing cotton layers The keel and the sound-absorbing cotton layer are embedded in the side groove of the I-shaped keel, and the combination of the I-shaped profile keel and the sound-absorbing cotton forms a core structure with certain deformation resistance. Further, on the basis of the above-mentioned improvements, this program also adds a metal protective panel on the periphery of the composite board. Specifically, the sound-absorbing board also includes a stainless steel metal panel A and a stainless steel metal panel B. The stainless steel metal panel A is set on the flame-retardant gypsum board A. Outside, the stainless steel metal panel B is set on the outside of the flame-retardant gypsum board B, the stainless steel metal panel A, the flame-retardant gypsum board A, the sound-absorbing non-woven fabric A, the flame-retardant sound-absorbing orifice A, the sound-absorbing cotton layer, the flame-retardant sound-absorbing orifice B , sound-absorbing non-woven fabric B, flame-retardant gypsum board B, and stainless steel metal panel B are tightly pressed together in sequence to form a composite noise-reducing sound-absorbing panel. The thickness of the stainless steel metal panel in this program is preferably 2mm. The introduction of the I-shaped keel and the stainless steel metal panel effectively enhances the overall structural strength of the composite panel and facilitates assembly and use, and improves the maintenance convenience of the American box substation shell.

Sound-absorbing cotton is a kind of artificial inorganic fiber. Generally, natural ore such as quartz sand, limestone, dolomite is used as the main raw material, and some chemical raw materials such as soda ash and borax are melted into glass. Thin fibers, fibers are intertwined with each other, intersecting three-dimensionally, and many small gaps are formed inside, so as to realize the function of sound absorption and noise reduction. The sound-absorbing cotton of different materials is also suitable for absorbing noise frequency bands. The sound-absorbing cotton of this scheme can also absorb noise in other frequency bands on the basis of absorbing low-frequency noise. Layer, polyurethane sponge layer, open-cell polyester fiber layer, open-cell EPDM rubber layer, polyurethane sponge layer, and open-hole polyester fiber layer are closely bonded to form a whole sound-absorbing cotton layer. Open-cell EPDM rubber has good airborne sound insulation performance due to its excellent viscoelasticity, which can eliminate the sound wave vibration generated when the machine is running, and effectively reduce the resonance transmission of low-frequency noise. Polyurethane sponge has excellent noise reduction performance, especially for the absorption of intermediate frequency noise. Open cell polyester fiberboard has good medium and high frequency noise absorption performance and is used to eliminate high frequency noise. The combination of the above three effectively enhances the noise reduction performance of the sound-absorbing cotton.

The flame-retardant and sound-absorbing orifice plate of this scheme also adopts the design scheme of multi-functional layers. Different materials are used to form layers with corresponding functions, and small holes are arranged on the plate layer to improve the noise reduction effect of the composite plate by using the principle of small hole noise reduction. performance. Specifically, the flame-retardant sound-absorbing orifice plate includes a tightly bonded flame-retardant layer and a sound-absorbing layer. The flame-retardant layer is provided with a number of regularly arranged tapered tapered holes A, and the sound-absorbing layer is provided with a number of regularly arranged tapered tapered holes A. Hole B, the average flow cross-sectional area of the tapered tapered hole B is greater than the average flow cross-sectional area of the tapered tapered hole A. The tapered channel helps to reduce the energy of the sound wave, and the second-stage enlarged tapered channel has a good effect on further noise reduction. The thickness of the flame-retardant sound-absorbing orifice plate of this solution is preferably 12mm.

The sound-absorbing non-woven fabric of this scheme also adopts a multi-layer design scheme, and a noise-reducing layer is set between the surface non-woven fabrics, that is, the sound-absorbing non-woven fabric includes non-woven fabric layer A, sound-absorbing cotton layer A, aluminum foil Layer, sound-absorbing cotton layer B, non-woven fabric layer B, non-woven fabric layer A, sound-absorbing cotton layer A, aluminum foil layer, sound-absorbing cotton layer B, and non-woven fabric layer B are closely bonded to form a whole sound-absorbing non-woven fabric. The sound-absorbing cotton can effectively absorb noise energy, and the aluminum foil layer can not only insulate sound, but also reflect sound waves, so that the sound waves are absorbed by the sound-absorbing cotton after reflection, improving the effect of noise reduction.

The flame-retardant reinforced structure formed by combining the flame-retardant gypsum board of this solution with the outer stainless steel metal panel not only has a good flame-retardant effect, but also has a stable overall structure. Therefore, the thickness of the flame-retardant gypsum board of this solution is preferably 12mm.

The noise-reducing housing for American-style box-type substations in this program consists of a sound-absorbing top cover plate 1, a sound-absorbing air box 2, a left sound-absorbing plate 3, a right sound-absorbing plate 4, a rear side sound-absorbing plate 5, a sound-absorbing air intake box 6, and a sound-absorbing louver 7. The metal bottom frames 8 are spliced to form a box body. The muffler air intake box 6 is located at the bottom of the rear side muffler plate 5 close to the lower part of the heat sink of the American box transformer, and the muffler air outlet box 2 is located at the top of the muffler top cover plate 1 near the side of the muffler air intake box 6 . The noise-absorbing shutter 7 includes a left noise-absorbing shutter 7-1 and a right noise-absorbing shutter 7-2, which are respectively connected to the left side noise reduction board 3 and the right side noise reduction board 4 through hinges, and are connected to the metal bottom frame 8 through a pin. The sound-absorbing top cover plate, the sound-absorbing outlet box, the left sound-absorbing plate, the right sound-absorbing plate, the rear side sound-absorbing plate, the sound-absorbing air intake box, and the sound-absorbing louvers of the American-style box-type substation all adopt advanced composite noise-reducing and sound-absorbing shutters. plate. Composite noise-reducing sound-absorbing panels are composed of C-shaped keels, low-frequency sound-absorbing cotton, perforated flame-retardant sound-absorbing panels, sound-absorbing non-woven fabrics, flame-retardant gypsum boards, and metal panels.

The noise reduction effect of the existing American box-type box-type substation noise-reduction shell is not obvious, and the problem of heat dissipation of the American-style box-type substation after the noise-reduction shell is installed cannot be solved. The advantage of this solution is that it not only effectively reduces the noise transmitted to the surrounding environment during the operation of the American-style box-type transformer, but also ensures the heat dissipation of the American-style box-type transformer, which solves the problem of ventilation and heat dissipation of the noise reduction shell and the problem of noise leakage. This scheme adopts modular design, which is energy-saving and environmentally friendly, and can be reused. The on-site manufacturing process is simple, the installation is quick, and it is also convenient for the later maintenance of the American-style box-type substation. This scheme effectively reduces the noise generated during the operation of the American box-type transformer to the surrounding environment. The muffler air intake box is located at the lower part of the rear side muffler plate, close to the bottom of the heat sink of the American box transformer, and the muffler air box is located on the top of the muffler top cover, near the side of the muffler air intake box, and the heat generated during the operation of the American box transformer is dissipated by the heat sink , and through the air convection between the muffler air intake box and the muffler air box, the heat dissipated from the heat sink of the American box transformer is taken out of the noise reduction shell to ensure the normal operation of the American box transformer.

The sound-absorbing louvers of this scheme are composed of a layer of louvers and a layer of noise-reducing sound-absorbing panels. While reducing noise, they can ensure normal air convection and can effectively prevent small animals from entering the American-style box-type substation. In order to prevent the noise generated during the operation of the American box-type transformer from being transmitted to the sound-absorbing shell through the base, a layer of sound-absorbing rubber pad is added between the base and the sound-absorbing shell. In order to prevent raindrops from generating noise on the top and affecting residents when it rains, a layer of weather-resistant rubber sheet is pasted on the top of the noise-reducing shell.

The main points of the noise-reducing shell for American-style box-type transformers in this scheme are: through the composite noise-reducing sound-absorbing board made of C-shaped keel, low-frequency sound-absorbing cotton, perforated flame-retardant sound-absorbing board, sound-absorbing non-woven fabric, flame-retardant gypsum board, and metal panel A box is formed to effectively reduce the noise in the process of noise transmission and reduce the pollution of noise to the surrounding environment. The noise reduction air intake box and the noise reduction air box are designed with special air flow channels to ensure normal convection of the air and to ensure that the noise does not leak through the air inlet and outlet boxes, which solves the problem of ventilation and heat dissipation and noise leakage of the noise reduction shell for American box transformers. question. Based on the above characteristics, the noise-reducing housing for American-style box-type transformers of this scheme has outstanding substantive features and significant progress compared with existing products.

The noise-reducing housing for American-style box-type transformers of this proposal is not limited to the content disclosed in the specific implementation, and the technical solutions appearing in the examples can exist independently or include each other, and those skilled in the art can make according to this proposal in combination with common knowledge Simple replacements are also within the scope of this proposal.

Claims (9)

1. a kind of American Unit Substation noise-reduction case, is characterized in that including the acoustical panel at top, the acoustical panel in left side, the noise reduction on right side Plate, the acoustical panel of rear side, front sound-deadening louver, metal bottom seat frame, the bottom of the acoustical panel of the rear side is provided with noise reduction air inlet Case, the side of the close described noise reduction inlet box of the acoustical panel at the top is provided with noise reduction and goes out gas tank, and the noise reduction goes out gas tank Rain-proof cover is provided with above one end of the acoustical panel at top described in pass-out, the rain-proof cover goes out described in gas tank pass-out with the noise reduction Exhaust clearance is provided between one end of the acoustical panel at top, the front sound-deadening louver includes shutter outer layer, noise-reduction plate Internal layer, the acoustical panel at the top, the acoustical panel in left side, the acoustical panel on right side, the acoustical panel of rear side, front sound-deadening louver group Close and formed and can be located in the metal bottom seat frame with the noise reduction shell of outside air convection, the noise reduction outer shell base.

2. American Unit Substation noise-reduction case according to claim 1, it is characterised in that the noise reduction shell and the metal Noise reduction valve rubber is provided between base frames, the noise reduction valve rubber prevents the metal bottom seat frame by noise transmission to outside the noise reduction Shell.

3. American Unit Substation noise-reduction case according to claim 1, it is characterised in that the outside of the acoustical panel at the top Be pasted with weather-proof rubber layer, the rain-proof cover top outer is pasted with weather-proof rubber layer, the weather-proof rubber layer eliminate it is outside because The noise that the top of the element effect noise reduction shell produces.

4. American Unit Substation noise-reduction case according to any one of claim 1 to 3, it is characterised in that the acoustical panel Including the flame-retardant gypsum board A, sound-absorbing non-woven fabrics A, fire-retardant sound-absorbing orifice plate A, acoustical cotton layer, fire-retardant sound-absorbing orifice plate B for overlapping successively, inhale Sound non-woven fabrics B, flame-retardant gypsum board B, it is the flame-retardant gypsum board A, sound-absorbing non-woven fabrics A, fire-retardant sound-absorbing orifice plate A, acoustical cotton layer, fire-retardant Closely pressing forms compound noise-reducing acoustical panel entirety for sound-absorbing orifice plate B, sound-absorbing non-woven fabrics B, flame-retardant gypsum board B.

5. American Unit Substation noise-reduction case according to claim 4, it is characterised in that be provided with some in the acoustical cotton layer Regularly arranged I shape keel, it is whole that the acoustical cotton layer is embedded in formation acoustical cotton layer in the side grooves of the I shape keel Body.

6. American Unit Substation noise-reduction case according to claim 5, it is characterised in that the acoustical panel also includes stainless steel Metal decking A, stainless steel metal panel B, the stainless steel metal panel A is located at the outside of the flame-retardant gypsum board A, it is described not Rust steel metal panel B is located at the outside of the flame-retardant gypsum board B, the stainless steel metal panel A, flame-retardant gypsum board A, sound-absorbing without Spin cloth A, fire-retardant sound-absorbing orifice plate A, acoustical cotton layer, fire-retardant sound-absorbing orifice plate B, sound-absorbing non-woven fabrics B, flame-retardant gypsum board B, stainless steel metal Successively closely pressing forms compound noise-reducing acoustical panel entirety to panel B.

7. American Unit Substation noise-reduction case according to claim 4, it is characterised in that the acoustical cotton layer includes folding successively The perforate ethylene-propylene-diene monomer glue-line of conjunction, polyurethane sponge layer, perforate layer of polyester fiber, it is the perforate ethylene-propylene-diene monomer glue-line, poly- Urethane spongy layer, perforate layer of polyester fiber close adhesion form acoustical cotton layer entirety.

8. American Unit Substation noise-reduction case according to claim 4, it is characterised in that the fire-retardant sound-absorbing orifice plate includes tight The flame-retardant layer of close bonding, sound absorbing layer, the flame-retardant layer is provided with some regularly arranged tapered conical hole A, on the sound absorbing layer Some regularly arranged tapered conical hole B are provided with, the average passage section area of the tapered conical hole B is more than the tapered cone The average passage section area of shape hole A.

9. American Unit Substation noise-reduction case according to claim 4, it is characterised in that the sound-absorbing non-woven fabrics is included successively Nonwoven layer A of overlapping, acoustical cotton layer A, aluminium foil layer, acoustical cotton layer B, nonwoven layer B, nonwoven layer A, acoustical cotton layer A, Aluminium foil layer, acoustical cotton layer B, nonwoven layer B close adhesion form sound-absorbing non-woven fabrics entirety.