CN207122704U - A kind of energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top - Google Patents
A kind of energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top Download PDFInfo
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- CN207122704U CN207122704U CN201720884718.0U CN201720884718U CN207122704U CN 207122704 U CN207122704 U CN 207122704U CN 201720884718 U CN201720884718 U CN 201720884718U CN 207122704 U CN207122704 U CN 207122704U
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Abstract
The utility model discloses a kind of energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top, specifically includes shunting conduction pipe, and connecting pipe is set below shunting conduction pipe, interference noise elimination pipeline is set below connecting pipe；Wherein shunting conduction pipe is made up of the lateral being arranged symmetrically.Position of the utility model according to blower fan, air inlet etc., steric requirements, air intake is shunted into conduction pipe and is effectively matched with interference noise elimination pipeline, blower fan noise reduction is realized while realizing that intake stack saves.
Description
Technical field
A kind of energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top is the utility model is related to, belongs to coal-burning power plant, refining
Oily factory, smeltery, the ventilating system of air-conditioning and other field.
Background technology
The fan wind inleting tube road of large coal-fired power plant, oil plant and other ventilating systems etc. is generally divided into horizontal air intake and top
The vertical air intake two ways in 90 ° of portion.And for 90 ° of top intake stack, typically rain cover can be installed in air inlet, rain cover
In the presence of forcing air intake air-flow to form four elbow bends interfered in form, air inlet flow field is disorderly, forms maelstrom,
And go out flow phenomenon with local air flow.So as to increase the aeration resistance of air inlet, air inflow reduces.Identical air quantity requirement
Under, blower fan needs to provide higher negative pressure power, is unfavorable for Fan Energy-saving.
A noise part is directly transmitted by tube wall caused by blower fan work, and most of noise is propagated along intake stack,
Surrounding space is radiated from air inlet.Traditional noise-reduction method is to install air-inlet sound eliminator additional in air inlet, and the noise-reduction method can be realized
Good noise reduction, but air-inlet sound eliminator typically more uses dissipative muffler, its low frequency acoustic attenuation performance and environmental suitability
Difference, is highly prone to the influence of wind speed etc., and under the conditions of Wind Volume, the acoustic attenuation performance of silencer, which reduces, even to be lost.Dissipative muffler
Anechoic sheet need to regularly replace, certain material and installation cost be present.In addition, the pressure loss of general dissipative muffler is often
It is several times even tens times of the intake stack pressure loss, therefore, air intake is largely increased after increasing air-inlet sound eliminator
Resistance so that fan energy consumption increases.
Noise caused by fan operation, its dominant frequency are typically distributed across middle low frequency, and the noise elimination model of traditional dissipative muffler
Mainly medium-high frequency is enclosed, therefore the noise-reduction method of intake stack installation dissipative muffler can not fundamentally solve fan operation and make an uproar
The problem of sound pitch.Fan noise spectral characteristic need to be directed to, develops more efficiently noise-reduction method.
Authorized announcement date is on December 21st, 2016, and Authorization Notice No. is in ZL 201620709759.1 Chinese patent,
Disclose a kind of energy-saving silencing pipeline, including entrance, pipe main body and pipe outlet；Wherein pipe main body is entrance
Part between pipe outlet, pipe main body include one or more pipeline group, and pipeline group is by two independent points
Branch pipe(tube) forms；Sound wave is divided into different paths along two laterals of the pipeline group after pipeline group is entered and propagated, most
When spreading out of the pipeline group and being converged, the phase difference of the sound wave of two lateral outflows is the odd-multiple of half-wavelength afterwards.The reality
It will dexterously be eliminated the noise with the new principle offset using sound wave interference and be unified well with current stabilization, both served well
Soundproof effect, the effect of energy-conservation current stabilization is served again.The energy-saving silencing pipeline has for horizontal intake stack preferably eliminates the noise
Energy-saving effect, while can realizing effective noise reduction for fan noise frequency spectrum, the guide functions of lateral reduce pipeline again
Voltage loss.The energy-saving silencing pipeline is not suitable for the 90 ° of air inlet modes in top, can not improve the disorderly stream caused by rain cover
.
The content of the invention
The purpose of this utility model provides a kind of vertical suitable for 90 ° of top to solve above the deficiencies in the prior art
The energy-saving silencing pipeline of air intake.
The technical solution of the utility model is as follows：
A kind of energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top, including shunting conduction pipe, shunt conduction pipe
Lower section sets connecting pipe, and interference noise elimination pipeline is set below connecting pipe；Conduction pipe is wherein shunted by being arranged symmetrically
Lateral forms.
Further, the described energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top, symmetrically arranged lateral
With arc-shaped transition.
Further, the described energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top, the lateral are set in pairs
Meter, and connected with connecting pipe.
Further, the described energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top, interference noise elimination pipeline include into
The subtube of group design；Each two subtube forms a pipeline group, for a counteracting frequency；Each pipeline group utilizes it
The length difference of subtube make it that producing phase difference in pipeline group exit by the sound wave of the pipeline group realizes counteracting.
Further, the described energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top, two in the pipeline group
The length difference of subtube causes the odd-multiple for half-wavelength by the phase difference of the sound wave of the pipeline group.
Further, the described energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top, shunting conduction pipe inside is also
Other silencer elements can be set.
The utility model is shunted the tube shaped of water conservancy diversion by air intake, solved for 90 ° of vertical air inlet modes at the top of blower fan
Air intake air turbulence of the air inlet caused by rain cover, the problem of air intake resistance is big, and the function of rain cover can be replaced.
The utility model, according to fan noise frequency spectrum, makes intake stack have in itself necessarily using noise-cancelling theory is interfered
Anti- sound acoustic attenuation performance, and its acoustic attenuation performance has stronger band designs characteristic.
The utility model shunts water conservancy diversion and effective combination of interference noise elimination by 90 ° of top air intake, and improving, air inlet is disorderly
While sinuous flow field, reduction air intake resistance, make pipeline that there are certain design frequency band acoustic characteristicses in itself, realize that intake stack is equal
Flow the unification of current stabilization, energy-conservation and noise reduction.While noise reduction is realized, air inlet system resistance is reduced, so as to realize Fan Energy-saving.
The utility model intake stack air inlet replaces existing air intake rain cover using shunting conduction pipe, improves air intake
Flow field of the mouth caused by rain cover is disorderly, eliminates maelstrom, reduces air intake resistance, and have rainproof function.
The utility model air inlet connection interference noise elimination pipeline, it is real for the crest frequency in fan noise frequency spectrum
Effective elimination of existing blower fan dominant frequency noise.
Position of the utility model according to blower fan, air inlet etc., steric requirements, air intake shunting conduction pipe is disappeared with interference
Sound pipe road is effectively matched, and blower fan noise reduction is realized while intake stack energy-conservation is realized.
The utility model shunting conduction pipe is designed according to the air motion track of existing 90 ° of intake stacks in top,
Make horizontal gas flow even transition to vertical intake stack, avoid during rain cover interfering, forming turbulent flow for four strands of air-flows
Phenomenon, reduce intake resistance.
The utility model interference noise elimination pipeline utilizes passive interference noise-cancelling theory, by the length difference of lateral, in sky
Between on make two row sound waves produce phase difference, when phase difference of the two row sound waves under specific frequency be half-wavelength odd-multiple when, should
Two row sound waves are cancelled out each other, and realize noise elimination noise reduction.
The utility model shunting conduction pipe replaces the air intake rain cover of existing 90 ° of intake stacks in top, improves rain cover
Caused disorderly flow field, air intake resistance is reduced, solve air-flow and locally go out flow problem, while there is rainproof function.
Multiple operation principles are the utility model is related to, it is specific as follows：
Operation principle one：The vertical intake stack in 90 ° of top typically sets rain cover in air inlet, and rain cover forces air inlet
Stream forms 4 elbow bends interfered in form, and air inlet flow field is disorderly, forms maelstrom, and be accompanied by local gas
Flow out flow phenomenon.The utility model shunt conduction pipe while rainproof function is ensured, make inlet air flow shunting and water conservancy diversion enter into
Wind pipeline, avoid flow field turbulent flow, eliminate maelstrom, and avoid part and go out flow problem.
Operation principle two：Interfere noise elimination pipeline to utilize the length difference of lateral, two row sound waves is produced phase
Potential difference, when the phase difference of a certain row sound wave of frequency two is just the odd-multiple of half-wavelength, the sound wave under the frequency is completely counterbalanced by.
When interfering the lateral of noise elimination pipeline to design simultaneously, the trend of air-flow is also taken into account, plays a part of shunting and flows.
Operation principle three：Shunt conduction pipe and interfere effective combination of noise elimination pipeline, realize that the 90 ° of intake stacks in top disappear
Sound and the unification of energy-conservation.
The course of work of the present utility model is as follows：
1st, air-flow enters fan wind inleting tube through shunting conduction pipe, avoids disorderly stream of the inlet air flow caused by rain cover
, air inlet maelstrom is eliminated, reduces air intake resistance.
2nd, noise caused by fan operation is propagated by interference noise elimination pipeline to air inlet, by interfering the dry of noise elimination pipeline
Relate to noise elimination effect and eliminate or weaken the Middle and low frequency noise of blower fan.
3rd, connecting pipe is rationally set according to the locus of shunting conduction pipe and interference noise elimination pipeline, avoids the occurrence of stream
Field is mutated induced quadratic noise and vibration.
Beneficial effect
1st, the utility model is applied to the fan wind inleting tube road of the vertical air inlet mode in 90 ° of top, and the pipeline is realizing blower fan
Fan noise can be effectively reduced while energy-conservation, simple in construction, environmental suitability is strong.
2nd, it is of the present utility model shunting conduction pipe while rainproof function is realized, solve current rain cover force into
Four elbow bends interfered and part that air-flow is formed in form go out the problem of flowing, and eliminate air intake maelstrom, reduce
Air intake resistance, realize Fan Energy-saving.The shunting conduction pipe is easy to be combined with other silencer elements, further improves pipeline sheet
The acoustic attenuation performance of body.
3rd, caused spectral characteristics of noise is adjusted when interference noise elimination pipeline of the present utility model can be according to fan operation
Section, acoustic attenuation performance is high and has frequency spectrum design characteristics.The interference noise elimination pipeline is easy to be combined with other silencer elements, further
Improve its acoustic attenuation performance.
4th, the utility model is simple in construction, and environmental suitability is strong, acoustic attenuation performance influenceed by wind speed etc. it is smaller, not only environmental protection but also
Safety, has higher promotional value.
Brief description of the drawings
Fig. 1 is the energy-saving silencing pipeline front view suitable for 90 ° of top air intake described in embodiment 1；
Fig. 2 is the energy-saving silencing pipeline side view suitable for 90 ° of top air intake described in embodiment 1；
In figure 1 above-Fig. 2,1 is shunting conduction pipe, and 2 be connecting pipe, and 3 be interference noise elimination pipeline.
Embodiment：
Traveling one is entered to the energy-saving silencing pipeline provided by the utility model suitable for 90 ° of top air intake below in conjunction with the accompanying drawings
Walk explanation.
Embodiment 1
The present embodiment provides a kind of energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top, as shown in figure 1, including dividing
Conduction pipe 1 is flowed, the lower section of shunting conduction pipe 1 sets connecting pipe 2, and the lower section of connecting pipe 2 sets interference noise elimination pipeline 3；Its
Middle shunting conduction pipe 1 is made up of the lateral being arranged symmetrically, and lateral is so kept away from level to vertical even transition
Exempt from air intake air turbulence of the air inlet caused by rain cover, the problem of air intake resistance is big, while can be very good to replace
Rain cover.Lateral designs in pairs, and is connected with connecting pipe 2；Interference noise elimination pipeline 3 includes being in charge of for Group Design
Road；Each two subtube forms a pipeline group, for a counteracting frequency；Each pipeline group utilizes the length of its subtube
Official post must produce phase difference in pipeline group exit by the sound wave of the pipeline group and realize counteracting., can in specific implementation process
According to specific air intake situation, the quantity of pipeline group and the length and shape of subtube etc. are designed, to realize to greatest extent
Counteracting sound wave effect.
As shown in Fig. 2 the side view of the energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top provided for the present embodiment
Figure, interference noise elimination pipeline 3 include a pipeline group of two subtube compositions, and two subtubes pass through pipeline in the pipeline group
Radian designs and utilized length difference caused by the two to cause the odd number by the phase difference of two subtube sound waves for half-wavelength
Times, sound wave realizes noise elimination by being cancelled out each other after two subtubes when outlet converges.Meanwhile shunt inside conduction pipe 1
Other silencer elements can also be set, strengthen pipeline acoustic attenuation performance.
Embodiment 2
By taking the transformation of certain power plant 300MW unit primary air fan intake stacks energy-saving silencing as an example, comprise the following steps：
Cancel primary air fan air-inlet sound eliminator and rain cover, air-flow enter intake stack by shunting conduction pipe, improve
Air intake disorder flow field caused by rain cover, reduce air intake resistance.Shunt and other silencer elements are combined in conduction pipe, carry
The high medium-high frequency acoustic attenuation performance of intake stack.SR is greatly reduced after cancelling air-inlet sound eliminator, realizes Fan Energy-saving.
Air inlet connection interference noise elimination pipeline, interference noise elimination pipeline design according to fan operation noise spectrum, effectively
Eliminate Middle and low frequency noise caused by fan operation.
According to shunting conduction pipe and the locus for interfering noise elimination pipeline, connecting pipe is matched, avoids intake stack stream
Field is mutated induced quadratic noise and vibration.
Claims (6)
1. a kind of energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top, it is characterised in that including shunting conduction pipe（1）,
Shunt conduction pipe（1）Lower section sets connecting pipe（2）, connecting pipe（2）Lower section sets interference noise elimination pipeline（3）；Wherein divide
Flow conduction pipe（1）It is made up of the lateral being arranged symmetrically.
2. the energy-saving silencing pipeline according to claim 1 suitable for the vertical air intake in 90 ° of top, it is characterised in that symmetrical
The lateral of setting has arc-shaped transition.
3. the energy-saving silencing pipeline according to claim 1 suitable for the vertical air intake in 90 ° of top, it is characterised in that described
Lateral designs in pairs, and and connecting pipe（2）Connection.
4. the energy-saving silencing pipeline according to claim 1 suitable for the vertical air intake in 90 ° of top, it is characterised in that interference
Noise elimination pipeline（3）Subtube including Group Design；Each two subtube forms a pipeline group, for a counteracting frequency；
Each pipeline group to produce phase in pipeline group exit by the sound wave of the pipeline group using the length difference of its subtube
Difference, which is realized, to be offset.
5. the energy-saving silencing pipeline according to claim 4 suitable for the vertical air intake in 90 ° of top, it is characterised in that described
The length difference of two subtubes causes the odd-multiple for half-wavelength by the phase difference of the sound wave of the pipeline group in pipeline group.
6. the energy-saving silencing pipeline according to claim 1 suitable for the vertical air intake in 90 ° of top, it is characterised in that shunting
Conduction pipe（1）It is internal that other silencer elements also can be set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720884718.0U CN207122704U (en) | 2017-07-20 | 2017-07-20 | A kind of energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720884718.0U CN207122704U (en) | 2017-07-20 | 2017-07-20 | A kind of energy-saving silencing pipeline suitable for the vertical air intake in 90 ° of top |
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| CN207122704U true CN207122704U (en) | 2018-03-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503024A (en) * | 2020-11-02 | 2021-03-16 | 北京朗新明环保科技有限公司南京分公司 | Energy-saving and comprehensive noise-reducing fan pipeline and transformation method |
| CN115111456A (en) * | 2022-06-29 | 2022-09-27 | 国网陕西省电力有限公司电力科学研究院 | Modular, combinable and broadband pipeline silencer design method |
-
2017
- 2017-07-20 CN CN201720884718.0U patent/CN207122704U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503024A (en) * | 2020-11-02 | 2021-03-16 | 北京朗新明环保科技有限公司南京分公司 | Energy-saving and comprehensive noise-reducing fan pipeline and transformation method |
| CN115111456A (en) * | 2022-06-29 | 2022-09-27 | 国网陕西省电力有限公司电力科学研究院 | Modular, combinable and broadband pipeline silencer design method |
| CN115111456B (en) * | 2022-06-29 | 2023-06-27 | 国网陕西省电力有限公司电力科学研究院 | Modularized, combinable and broadband pipeline muffler design method |
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