CN204164048U - A kind of Three way type air exhausting soundproofing elbow for 110kV transformer chamber - Google Patents

Abstract

The utility model discloses a three-way exhaust muffler elbow for a 110kV main transformer room, which is installed at the air outlet of a wall-type axial flow exhaust fan on the outer wall of the 110kV main transformer, including a casing and a The three-way pipeline in the shell, the three-way pipeline includes the air inlet channel, the first and the second air outlet channel, the center line of the air inlet coincides with the center line of the wall-type axial flow exhaust fan, the air inlet channel, the first and the second air outlet channel The junction of the second air outlet channel is provided with a sound-absorbing diversion wedge, and it is set directly opposite to the center line of the wall-type axial flow exhaust fan. The air inlet end of the muffler sheet is provided with a conical guide piece, the first and second air outlets are respectively connected to the air inlet end of a rainproof cap, and the wind outlet end of the rainproof cap is provided with a stainless steel silk screen. The overall noise reduction of the three-way exhaust noise reduction elbow of the utility model is higher, which can be increased by more than 3dB (A) compared with the prior art, and has a better noise reduction effect at the peak frequency of 110kV transformer noise.

Description

A Three-way Exhaust and Noise Reduction Elbow for 110kV Main Transformer Room

technical field

The utility model relates to the technical field of environmental engineering, in particular to a three-way exhaust and noise-reducing elbow used in a 110kV main transformer room.

Background technique

With the development of the economy and the acceleration of the urbanization process, the electricity load in the urban area is increasing, and there are more and more substations in the urban area. Since 110kV substations can directly supply power to users with 35kV and 10kV, most of them are located near offices and residential areas, and some are even located in residential areas. Most of the 110kV substations in urban areas are indoor substations, and the main transformer is installed in the 110kV main transformer room. For the 110kV indoor substation, although the main noise source in the substation—the noise of the main transformer has been basically isolated in the 110kV main transformer room, the noise of the main transformer will still affect the external environment through the air outlet of the main transformer room. , coupled with the fact that the noise of the main transformer has a significant narrow-band low-frequency characteristic, which presents peak sound pressure levels at 100Hz, 200Hz and 400Hz, making its low-frequency sound effects more obvious. In addition, the exhaust fan itself for ventilation and heat dissipation in the main transformer room will also generate noise, and its noise will also affect the external environment along with the exhaust air.

At present, most of the 110kV indoor substations in the urban area are close to residential buildings or office areas. The noise will inevitably affect the surrounding residents, and it is easy to cause environmental conflicts caused by the impact of noise transmission, which has become a major environmental pollution problem in the power grid system. , there is an urgent need for noise reduction treatment for the exhaust outlet of the 110kV main transformer room.

An effective way to deal with noise reduction at the exhaust outlet is to install an exhaust noise reduction elbow on the exhaust outlet. At present, the noise-absorbing elbows used in the ventilation system are generally selected according to the national standard atlas "ZP type sheet muffler ZW type noise-absorbing elbow". The sound attenuation of the bent pipe is low at the peak frequency of transformer noise, and its overall sound attenuation is also not good. In addition, the exhaust fan of the indoor substation uses a wall-type axial flow fan. When installing the silencing elbow, it is directly placed on the air outlet of the exhaust fan, close to the exhaust fan, and the ZW type silencing elbow is only suitable for installation in ventilation In the pipeline system, it needs to be separated from the exhaust fan by a certain distance. At the same time, the exhaust fan in the 110kV main transformer room has a large air volume. If the ZW type muffler elbow is used, it will be larger in size, and the distance to be protruded after installation will be larger, which is not only difficult to fix, but also affects the appearance. To sum up, the ZW muffler elbow is not suitable for the exhaust muffler of the 110kV main transformer room.

Contents of the invention

The purpose of this utility model is to provide a three-way exhaust and noise reduction elbow for the 110kV main transformer room in order to solve the above problems, which has a better noise reduction effect.

The purpose of this utility model is achieved in that:

A three-way exhaust muffler elbow for 110kV main transformer room of the utility model is installed at the air outlet of the wall-type axial flow exhaust fan on the outer wall of the 110kV main transformer. The acoustic elbow includes a shell and a three-way pipeline arranged in the shell, the three-way pipeline includes an air inlet channel, a first air outlet channel and a second air outlet channel, the air inlet channel, the first air outlet channel The channel and the second air outlet channel are respectively provided with an air inlet, a first air outlet, and a second air outlet on the housing. The air inlet is installed at the air outlet of the wall-type axial flow exhaust fan. The air inlet The centerline of the centerline coincides with the centerline of the wall-type axial flow exhaust fan, the first air outlet and the second air outlet are arranged in a horizontal direction and are all facing outward, the air inlet channel, the first air outlet channel and the second outlet A noise-eliminating diversion wedge is provided at the intersection of the air passages, and the tip of the noise-elimination diversion wedge is set directly against the center line of the wall-type axial flow exhaust fan. The first air outlet channel and the second air outlet In the middle of the channel, there is a vertically arranged sound-absorbing sheet, and the air-inlet end of the sound-absorbing sheet is provided with a conical guide piece, and the other end is flush with the plane where the first air outlet or the second air outlet is located. , the first air outlet and the second air outlet are respectively connected to the wind inlet end of a rainproof cap, and the wind outlet end of the rainproof cap is provided with a stainless steel wire mesh.

The above-mentioned three-way exhaust muffler elbow for 110kV main transformer room, wherein, the shell includes perforated galvanized steel plate/perforated aluminum plate, glass cloth, centrifugal glass wool plate and Galvanized steel plate, the centrifugal glass wool board is provided with a light steel keel.

The above-mentioned three-way exhaust muffler elbow for 110kV main transformer room, wherein the muffler sheet includes perforated galvanized steel plate/perforated aluminum plate, glass cloth, centrifugal glass wool board, glass cloth And perforated galvanized steel plate/perforated aluminum plate, the centrifugal glass wool plate is provided with a light steel keel.

The aforementioned three-way exhaust muffler elbow for a 110kV main transformer room, wherein the hole spacing of the stainless steel wire mesh is 10mm×10mm.

The above-mentioned three-way exhaust and muffler elbow for the 110kV main transformer room, wherein the rainproof cap is made of galvanized steel plate.

The aforementioned three-way exhaust muffler elbow for a 110kV main transformer room, wherein the wind inlet end of the rainproof cap is connected to the first air outlet or the second air outlet through a flange.

Compared with the prior art, the utility model has the following beneficial effects:

1. The overall noise reduction is higher, which can be increased by more than 3dB(A), reaching more than 13dB(A), and has a better noise reduction effect at the peak frequency of 110kV transformer noise;

2. When installing, just put the air inlet of the muffler elbow directly on the air outlet of the 110kV main transformer room wall-type axial flow exhaust fan, which is convenient for installation;

3. The exhaust air of the exhaust fan in the main transformer room is discharged from the two air outlets of the muffler elbow at the same time. The air volume of a single air outlet is halved, which can halve the cross section of a single air outlet. The pick distance becomes smaller, not only the support is convenient to fix, but also more beautiful.

Description of drawings

Fig. 1 is a schematic diagram of the exterior elevation of the utility model;

Fig. 2 is a schematic cross-sectional view along the direction 1-1 of Fig. 1;

Fig. 3 is a schematic cross-sectional view along the 2-2 direction of Fig. 1;

Fig. 4 is a structural schematic diagram of the utility model housing;

Fig. 5 is a schematic diagram of the structure of the noise-absorbing sheet of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Please refer to Figures 1 to 3, which show the three-way exhaust and noise-reducing elbow of the utility model for the 110kV main transformer room. The three-way exhaust and noise-reducing elbow is installed on the outer wall of the 110kV main transformer The air outlet of the wall type axial exhaust fan 7 on 8 includes a casing 1 and a three-way pipeline arranged in the casing 1, and the three-way pipeline includes an air inlet channel 63, a first air outlet channel 61 and a second air outlet channel. The air outlet channel 62 and the air inlet channel 63 are provided with an air inlet 66 on the housing 1, the first air outlet channel 61 is provided with a first air outlet 64 on the housing 1, and the second air outlet channel 62 is provided with a first air outlet 64 on the housing 1. Two air outlets 65, the air inlet 66 are installed at the air outlet of the wall type axial flow exhaust fan 7, and the center line of the air inlet 66 coincides with the center line of the wall type axial flow exhaust fan 7, the first air outlet 64 and the second air outlet The two air outlets 65 are arranged in a horizontal direction and are all facing the outside. The intersection of the air inlet channel 63, the first air outlet channel 61 and the second air outlet channel 62 is provided with a noise-eliminating diversion tip 5, and the noise-elimination diversion tip The tip of the splitter 5 is set facing the center line of the wall-type axial flow exhaust fan 7, and the middle of the first air outlet channel 61 and the second air outlet channel 62 are respectively provided with a vertically arranged sound-absorbing sheet 2, and the sound-absorbing sheet 2 The air inlet end is provided with a tapered air guide 21, and the other end is flush with the plane where the first air outlet 64 or the second air outlet 65 are located, and the first air outlet 64 and the second air outlet 65 are respectively connected to a rainproof The air inlet end of the cap 3 is connected by a flange 9, and the outlet end of the rainproof cap 3 is provided with a stainless steel wire mesh 4, the rainproof cap 3 is made of galvanized steel plate, and the hole spacing of the stainless steel mesh 4 is 10mm ×10mm.

Please refer to Fig. 4, the shell 1 includes the first perforated galvanized steel plate/perforated aluminum plate 15, the first glass cloth 14, the first centrifugal glass wool board 13 and the galvanized steel plate 11 arranged in sequence from inside to outside, the first centrifugal glass wool A first light steel keel 12 is arranged inside the board 13 .

Please refer to Fig. 5, the noise reduction sheet 2 includes the second perforated galvanized steel plate/perforated aluminum plate 21, the second glass cloth 23, the second centrifugal glass wool board 24, the second glass cloth 23 and the second perforated galvanized steel plate arranged in sequence / The perforated aluminum plate 21 and the second centrifugal glass wool plate 24 are provided with a second light steel keel 22 .

The sound-absorbing guide wedge 5 makes the air-flow entering the air-in passage 63 smoothly enter the first air-out passage 61 and the second air-out passage 62 on both sides; The air flow smoothly enters the first air outlet channel 61 or the second air outlet channel 62, thereby making the overall noise reduction of the utility model higher, which can be increased by more than 3dB (A), reaching more than 13dB (A), and in 110kV transformer There is a better noise reduction effect at the peak frequency of the noise.

The above embodiments are only for illustrating the utility model, rather than limiting the utility model. Those skilled in the art can also make various transformations or modifications without departing from the spirit and scope of the utility model. Therefore, all equivalent technical solutions should also belong to the category of the present utility model, and should be defined by each claim.

Claims (6)

1. the Three way type air exhausting soundproofing elbow for 110kV transformer chamber, be installed on the exhaust outlet place of the wall type axial flow blower on 110kV transformer chamber exterior wall, this Three way type air exhausting soundproofing elbow comprises shell and is located at the triplate line in this shell, described triplate line comprises inlet air passage, first air-out passage and the second air-out passage, described inlet air passage, first air-out passage and the second air-out passage on described shell respectively correspondence be provided with wind inlet, first exhaust outlet and the second exhaust outlet, described wind inlet is installed on the exhaust outlet place of wall type axial flow blower, it is characterized in that, the center line of described wind inlet overlaps with the center line of wall type axial flow blower, described first exhaust outlet and the second exhaust outlet are arranged and all toward the outer side in horizontal direction, described inlet air passage, first air-out passage and the second air-out passage mutually remittance place are provided with noise elimination water conservancy diversion wedge, the tip of this noise elimination water conservancy diversion wedge is just arranged the center line of described wall type axial flow blower, the center of described first air-out passage and the second air-out passage is respectively equipped with an anechoic sheet vertically arranged, the wind inlet end place of described anechoic sheet is provided with conical flow guiding part, the other end and the first exhaust outlet or the planes align residing for the second exhaust outlet, described first exhaust outlet is connected with the wind inlet end of a rainhat respectively with the second exhaust outlet, and the outlet air end of this rainhat is provided with Stainless Steel Cloth.

2. a kind of Three way type air exhausting soundproofing elbow for 110kV transformer chamber as claimed in claim 1, it is characterized in that, described shell comprises the perforation galvanized steel plain sheet/Pierced Aluminum Plank, glass fibre cloth, centrifugally glass-wool plate and the galvanized steel plain sheet that set gradually from inside to outside, is provided with Lightgage Steel Joist in described centrifugally glass-wool plate.

3. a kind of Three way type air exhausting soundproofing elbow for 110kV transformer chamber as claimed in claim 1, it is characterized in that, described anechoic sheet comprises the perforation galvanized steel plain sheet/Pierced Aluminum Plank, glass fibre cloth, centrifugally glass-wool plate, glass fibre cloth and the perforation galvanized steel plain sheet/Pierced Aluminum Plank that set gradually, is provided with Lightgage Steel Joist in described centrifugally glass-wool plate.

4. a kind of Three way type air exhausting soundproofing elbow for 110kV transformer chamber as claimed in claim 1, it is characterized in that, the hole pitch of described Stainless Steel Cloth is 10mm × 10mm.

5. a kind of Three way type air exhausting soundproofing elbow for 110kV transformer chamber as claimed in claim 1, it is characterized in that, described rainhat is made up of galvanized steel plain sheet.

6. a kind of Three way type air exhausting soundproofing elbow for 110kV transformer chamber as claimed in claim 1, it is characterized in that, the wind inlet end of described rainhat is connected with described first exhaust outlet or the second exhaust outlet by flange.