CN109767747A - A kind of multistage pressure control complex muffler - Google Patents
A kind of multistage pressure control complex muffler Download PDFInfo
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- CN109767747A CN109767747A CN201910031257.6A CN201910031257A CN109767747A CN 109767747 A CN109767747 A CN 109767747A CN 201910031257 A CN201910031257 A CN 201910031257A CN 109767747 A CN109767747 A CN 109767747A
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Abstract
Multistage pressure control complex muffler of the invention, restricting orifice is arranged in the intracorporal main shunting tube cavity lower end of shell, wall portion is from top to bottom throughout there is several circular through holes to constitute second level pressure control structures, outer, coaxial setting, it is fixedly connected with multilayer pressure control cylinder, from top to bottom also throughout there is several circular through holes on the barrel of every layer of pressure control cylinder, circular through hole on adjacent two layers pressure control cylinder barrel is staggeredly spaced apart, and secondary isocon is set, constitute level Four pressure control structure, dispersion undertakes the big pressure drop of atmospheric vent discharge, so that the air-flow of atmospheric vent discharge changes into pressure gradual change emptying by pressure jump emptying, big pressure drop steam discharge is avoided to generate strong jet noise, gas is aided with resistive sound absorber again after micropore jet and further absorbs sound, equipment internal pressure drops process can be controlled, reduce atmosphere displacement noise, improve noise spectrum quality, reach noise Prevention and cure of pollution target, adapts to nuclear power atmospheric exhaust regulating valve high pressure, the requirement of big flow, and noise elimination effect is good.
Description
Technical field
The present invention relates to three generations's nuclear power system corollary equipment and other heap-type nuclear power unit main steam bleeder valves or together
The multistage pressure control complex muffler of one of the end pipeline noise emission improvement of the discharge tube of class valve.
Background technique
Noise pollution is one of four big main pollutions of today's society, and silencer is that air-flow is allowed to pass through but can prevent or subtract
The device of weak Acoustic Wave Propagation is the technical measures for reducing air power noise；With being good for for China's Nuclear Safety regulation
Entirely, nuclear power developing will develop from 2nd generation, 2 generation, half technology to 3 generation techniques, and new opportunity to develop is also brought for nuclear power enterprise；" core
Electric Long-and Medium-term Development planning " it requires, accelerate to promote nuclear power generating equipment manufacture autonomy-oriented construction, reinforces research and development, key breakthrough is closed
The design and fabrication technology of button apparatus；" general office, National Development and Reform Commission is about organizing national major technologies and equipment development
The notice of special project work " it " million kilowatt nuclear power station complete set of equipments " is classified as national major technologies and equipment develops special project content；
Such as the steam parameter of the imperial No.1 nuclear power unit VDA system of China is very high, compared with CPR1000 etc., other nuclear power unit parameters will be inclined
Height causes pressure height, the flow into silencer big, and common silencer does not adapt to high pressure, the requirement of big flow, no
It can effectively solve the strong noise pollution of gas discharge.
Summary of the invention
The technical problem to be solved by the invention is to provide one kind can control equipment internal pressure drops process, reduces simultaneously
Atmosphere displacement noise improves noise spectrum quality, reaches noise abatement target, and it is high with atmospheric exhaust regulating valve to adapt to nuclear power
Pressure, the requirement of big flow, the good multistage pressure control complex muffler of noise elimination effect.
Multistage pressure control complex muffler of the invention, it is characterised in that: including being tightly connected, being fixedly mounted by supporting leg
The main isocon that can be connected to discharge tube is provided in the middle part of the shell outside atmospheric vent, housing cavity, it is main to divide
Flow tube top closure, lower end are fixedly connected in atmospheric vent, and main shunting tube cavity lower end is provided with restricting orifice, constitute one
Grade pressure control structure；Main shunting wall portion throughout there is several circular through holes, constitutes second level pressure control structure from top to bottom；In main isocon
The setting of section outer, coaxial is fixedly connected with multilayer pressure control cylinder, and the height of multilayer pressure control cylinder, diameter press sequence from inside to outside successively
Increase, from top to bottom also throughout there is several circular through holes on the barrel of every layer of pressure control cylinder, the circle on adjacent two layers pressure control cylinder barrel
Shape through-hole is staggeredly spaced apart, and constitutes labyrinth channel type three-level pressure control structure, multilayer pressure control cylinder and main isocon inner space structure
At multiple pressure control chambers, the centre frequency of multiple pressure control chambers is successively increased by sequence from inside to outside；Housing cavity is close to top
Position is provided with resistive sound absorber, and the part that housing sidewall inner surface is located at below resistive sound absorber is provided with absorbent treatment, is located at
Part above resistive sound absorber is provided with anti-bird net, and case top is provided with rain cover；
The main isocon middle section outer, coaxial setting is fixedly connected with four layers of pressure control cylinder, wherein being located at three layers of pressure control of inside
Cylinder top, bottom are all spherical surface, and outermost pressure control cylinder top, bottom are all plane；
Four layers of pressure control cylinder, main isocon inner space constitute five pressure control chambers, and the centre frequency of five pressure control chambers is pressed in
Outside sequence successively increases, respectively 980Hz, 2000Hz, 3820Hz, 4350Hz and 5230Hz；
The housing bottom is spherical surface, and the absorbent treatment thickness of housing bottom inner surface is greater than the absorbent treatment thickness of side wall inner surfaces；
The housing cavity, which is located on the position on the outside of main isocon, is provided with secondary isocon, secondary isocon top closure, bottom end
It is fixedly connected in atmospheric vent, pair shunts wall portion from top to bottom also throughout there is several circular through holes, constitutes level Four pressure control
Structure；
The housing cavity is provided with more secondary isocons, and more secondary isocons are distributed uniformly and circumferentially, around main shunting
Pipe setting；
Drain port is connected with by sealing device outside the main isocon lower end, is provided with catch tray below drain port；
The position that the hull outside corresponds to resistive sound absorber is fixedly connected with lifting lug；
The absorbent treatment, resistive sound absorber material are mineral wool；
The main isocon, multilayer pressure control barrel portion's circular through hole diameter are 6~20mm.
Multistage pressure control complex muffler of the invention, main shunting tube cavity lower end setting restricting orifice constitute level-one pressure control
Structure, main shunting wall portion is from top to bottom throughout there is several circular through holes to constitute second level pressure control structures, outside main isocon middle section
It is coaxially disposed, is fixedly connected with multilayer pressure control cylinder, from top to bottom also throughout having several circular through holes, phase on the barrel of every layer of pressure control cylinder
Circular through hole on adjacent two layers of pressure control cylinder barrel is staggeredly spaced apart, and constitutes labyrinth channel type three-level pressure control structure, housing cavity
Secondary isocon, secondary isocon top closure are provided on the position on the outside of main isocon, bottom end is fixedly connected on atmosphere row
On port, pair shunts wall portion from top to bottom also throughout there is several circular through holes, constitutes level Four pressure control structure, passes through multistage pressure control
Structure disperses undertake the big pressure drop of atmospheric vent discharge, and the pressure drop that every grade of pressure control structure is born gradually reduces, so that atmosphere is arranged
The air-flow of port discharge changes into pressure gradual change emptying by pressure jump emptying, avoids strong jet stream caused by big pressure drop steam discharge
Noise, gas are aided with resistive sound absorber again after micropore jet and further absorb sound, and can control equipment internal pressure drops process, simultaneously
Atmosphere displacement noise is reduced, noise spectrum quality is improved, reaches noise abatement target, nuclear power is adapted to and is adjusted with atmospheric exhaust
Valve high pressure, the requirement of big flow, noise elimination effect are good；It can be generalized to other generating set high temperature and pressure high flow capacities and extremely
The displacement noise pollution control of whole steam fluids, cost performance have comparative advantages under extreme parameters environment；It is tieing up
It is energy-saving and environment-friendly meanwhile, it is capable to reduce noise to hold nuclear power projects, improves environmental quality, applicability is extensive.
Detailed description of the invention
Fig. 1 is multistage pressure control complex muffler planar structure schematic diagram of the embodiment of the present invention；
In figure:
1, supporting leg, 2, catch tray, 3, drain port, 4, sealing device, 5, level-one pressure control-restricting orifice, 6, second level pressure control-main shunting
Pipe, 7, three-level-multilayer pressure control cylinder, 8, level Four pressure control-pair isocon, 9, absorbent treatment, 10, shell, 11, resistive sound absorber, 12, hang
Ear, 13, anti-bird net, 14, rain cover.
Specific embodiment
As shown, a kind of multistage pressure control complex muffler, including pass through supporting leg 1 and be tightly connected, be fixedly mounted on
Shell 10 outside atmospheric vent, 10 inner cavity of shell middle part is provided with the main isocon 6 that can be connected to discharge tube, main to divide
6 top closure of flow tube, lower end are fixedly connected in atmospheric vent, and main 6 inner cavity lower end of isocon is provided with restricting orifice 5, structure
At level-one pressure control structure；Main 6 wall portion of isocon throughout there is several circular through holes, constitutes second level pressure control structure from top to bottom；Main point
The setting of 6 middle section outer, coaxial of flow tube is fixedly connected with multilayer pressure control cylinder 7, and the height of multilayer pressure control cylinder 7, diameter are pressed from inside to outside
Sequence be sequentially increased, from top to bottom also throughout having several circular through holes, adjacent two layers pressure control cylinder on the barrel of every layer of pressure control cylinder
Circular through hole on barrel is staggeredly spaced apart, so that air-flow is above and below circular through hole, the tortuous circulation in left and right, constitutes labyrinth channel
Type three-level pressure control structure, the big pressure drop of atmospheric vent discharge is undertaken by the dispersion of multistage pressure control structure, and every grade of pressure control structure is held
The pressure drop received gradually reduces, so that the air-flow of atmospheric vent discharge changes into pressure gradual change emptying by pressure jump emptying, keeps away
Exempt from strong jet noise caused by big pressure drop steam discharge, equipment internal pressure drops process can be controlled, while reducing atmosphere discharge and making an uproar
Sound improves noise spectrum quality, reaches noise abatement target, adapts to nuclear power atmospheric exhaust regulating valve high pressure, big stream
The requirement of amount.
Multilayer pressure control cylinder 7 and main 6 inner space of isocon constitute multiple pressure control chambers, and the centre frequency of multiple pressure control chambers is pressed certainly
Sequence from inside to outside successively increases, i.e., each intracorporal frequency of chamber is successively increased according to the direction from air inlet to outlet in silencer.
Housing cavity is provided with resistive sound absorber 11 close to the position at top, and housing sidewall inner surface is located at resistive sound absorber
The part of lower section is provided with absorbent treatment 9, and gas is aided with resistive sound absorber 11, absorbent treatment 9 again after micropore jet and further absorbs sound,
Improve noise elimination effect.
The part that 10 side wall inner surfaces of shell are located at 11 top of resistive sound absorber is provided with anti-bird net 13, prevent toy into
Enter in silencer, rain cover 14 is provided at the top of shell 10, prevent dust, accumulation of rainwater, protective performance is high.
Main 6 middle section outer, coaxial of isocon setting is fixedly connected with four layers of pressure control cylinder 7, wherein being located at three layers of pressure control of inside
Cylinder top, bottom are all spherical surface, and outermost pressure control cylinder top, bottom are all plane, and spheric bottom, top further buffer gas
Flowing pressure is flowed, the born pressure of outermost pressure control cylinder is smaller, and considers limitations, at the top of side outermost pressure control cylinder,
Bottom is set as the lesser plane of occupied space.
Four layers of pressure control cylinder 7,6 inner space of main isocon constitute five pressure control chambers, and the centre frequency of five pressure control chambers is pressed certainly
Sequence from inside to outside successively increases, respectively 980Hz, 2000Hz, 3820Hz, 4350Hz and 5230Hz；
Can be coaxially disposed according to the different configurations of nuclear power unit and the design of atmos-valve exhaust system outside main 6 middle section of isocon,
It is fixedly connected with the pressure control cylinder 7 of different number, is needed to increase and decrease number of cavities according to parameter, in the core spectral regions for needing to control
It is distributed such as 250Hz, 500Hz, 1000Hz, 2000Hz, 4000Hz, 8000Hz frequency.
10 bottom of shell is spherical surface, and the absorbent treatment thickness of housing bottom inner surface is greater than the sound absorption thickness of side wall inner surfaces
Degree improves sound absorption effect.
10 inner cavity of shell, which is located on the position on the outside of main isocon, is provided with secondary isocon 8, every secondary 8 top of isocon envelope
It closes, bottom end is directly fixedly connected with main steam safety valve, and pair shunts wall portion from top to bottom also throughout having several circular through holes, structure
At level Four pressure control structure, the pressure drop dispersion effect of atmospheric vent discharge is further increased.
Different more pairs of configuration setting that housing cavity can be designed according to nuclear power unit and atmos-valve exhaust system shunt
Pipe, more secondary isocons are distributed uniformly and circumferentially, are arranged around main isocon, and secondary isocon quantity can carry out as needed
Increase and decrease, it is however generally that, parameter is higher, then number of cavities can increase, on the contrary then reduce.
Drain port 3 is connected with by sealing device 4 outside main 6 lower end of isocon, catch tray 2 is provided with below drain port 3；
To collect the moisture content of atmospheric vent discharge.
Position outside shell 10 corresponding to resistive sound absorber is fixedly connected with lifting lug 12, is easy to lift transport, installation.
Absorbent treatment, resistive sound absorber material are mineral wool, and sound absorption effect is good.
Main isocon 6,7 wall portion circular through hole diameter of multilayer pressure control cylinder are 6~20mm, and gas is flowed smoothly, depressurized simultaneously
Effect is good.
Specific mentality of designing:
Multistage pressure control complex muffler of the invention, main shunting tube cavity lower end setting restricting orifice constitute level-one pressure control knot
Structure, for main shunting wall portion from top to bottom throughout there is several circular through holes to constitute second level pressure control structure, main isocon middle section outside is same
Axis setting is fixedly connected with multilayer pressure control cylinder, adjacent from top to bottom also throughout there is several circular through holes on the barrel of every layer of pressure control cylinder
Circular through hole on two layers of pressure control cylinder barrel is staggeredly spaced apart, and constitutes labyrinth channel type three-level pressure control structure, housing cavity position
It is provided with secondary isocon on position on the outside of the main isocon, secondary isocon top closure, bottom end is fixedly connected on atmospheric exhaust
On mouth, pair shunts wall portion from top to bottom also throughout there is several circular through holes, constitutes level Four pressure control structure, passes through multistage pressure control knot
Structure dispersion undertakes the big pressure drop of atmospheric vent discharge, and the pressure drop that every grade of pressure control structure is born gradually reduces, so that atmospheric exhaust
The air-flow of mouth discharge changes into pressure gradual change emptying by pressure jump emptying, and strong jet stream caused by big pressure drop steam discharge is avoided to make an uproar
Sound, gas are aided with resistive sound absorber again after micropore jet and further absorb sound, can control equipment internal pressure drops process, drop simultaneously
Low atmosphere displacement noise improves noise spectrum quality, reaches noise abatement target, adapts to nuclear power atmospheric exhaust regulating valve
High pressure, the requirement of big flow, noise elimination effect are good；It can be generalized to other generating set high temperature and pressure high flow capacities and to complete
The displacement noise pollution control of portion's steam fluid, cost performance have comparative advantages under extreme parameters environment；It is maintaining
Nuclear power projects are energy-saving and environment-friendly meanwhile, it is capable to reduce noise, improve environmental quality, and applicability is extensive.
This patent belongs to nuclear power atmospheric exhaust release regulating valve acoustic wave filter structure, can be used for three generations's nuclear power system with being arranged
It is standby, it can also be used to the end pipeline noise emission of the discharge tube of other heap-type nuclear power unit main steam bleeder valves or similar valve
It administers, is a kind of multistage pressure control composite muffler structure.
For noise pollution as one of current four big pollutions, silencer is that air-flow is allowed to pass through but can prevent or weaken sound wave
The device of propagation is one of the technical measures for reducing air power noise.
With perfecting for China's Nuclear Safety regulation, nuclear power developing will develop from 2 generation of 2nd generation, half technology to 3 generation techniques,
New opportunity to develop is brought for nuclear power enterprise." planning of nuclear power Long-and Medium-term Development " requirement is accelerated to promote nuclear power generating equipment manufacture autonomous
Change construction, reinforces research and development, the design and fabrication technology of key breakthrough key equipment." general office, National Development and Reform Commission closes
The special notice to work is developed in organizing national major technologies and equipment " " million kilowatt nuclear power station complete set of equipments " is classified as
National major technologies and equipment develops special content.
The steam parameter of magnificent dragon No.1 nuclear power unit VDA system is very high, and compared with CPR1000 etc., other nuclear power unit parameters are high,
Very high into silencer pressure, flow is big, how to control its pressure, and the strong noise for solving gas discharge simultaneously is dirty
Dye is the significant technology issues of this project and the main innovation point of this project.
The advantage of multistage pressure control composite muffler structure is, is depressured using orifice fitting a total big pressure drop,
It is distributed to several partial structurtes to undertake, reduces the pressure drop being added in each partial structurtes, i.e., emptied, become by pressure jump
Pressure gradual change emptying, avoids jet noise strong caused by a big pressure drop steam discharge, gas is auxiliary again after micropore jet
It is further absorbed sound with resistive sound absorber, to reach better noise elimination effect.
This invention address that providing a kind of acoustic wave filter structure, a technical problem existing in the prior art is solved.
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention provides one kind greatly
The muffling device of gas exhaust outlet, it is therefore an objective to active control unit internal pressure drops process, while atmosphere displacement noise is reduced, improvement is made an uproar
Audio spectrum quality reaches noise abatement target.
In an exemplary embodiment of the present invention, acoustic(al)absorbent can be mineral wool, and secondary isocon can be selected by actual conditions
With.
To achieve the goals above, the technical scheme adopted by the invention is as follows:
A kind of multistage pressure control composite muffler of nuclear power, including multistage pressure control structure, support construction, drainage arrangement, auxiliary are inhaled
Acoustic device, protective device.Silencer nuclear structure is the multistage pressure control dress for being directly connected for reducing noise with atmospheric vent
It sets.
It is equipped with multiple cavities in multistage pressure control device, is equipped with the different equal discharge orifice in multiple apertures in each cavity.Institute
The centre frequency for stating multiple cavities is set gradually by low frequency to high-frequency from the inlet end of silencer to outlet extreme direction.
Cavity is generally five, includes the equal discharge orifice that multiple diameters are 6-20mm in each cavity, five cavitys
Centre frequency is respectively 980Hz, 2000Hz, 3820Hz, 4350Hz and 5230Hz.According to nuclear power unit and atmos-valve exhaust system
The different configurations of design, the satisfying increase and decrease of cavity.In general, parameter is higher, then number of cavities can increase, on the contrary then reduce.
Beneficial effects of the present invention: 1, multistage pressure control composite muffler is the main noise reduction member in atmospheric exhaust system
Part is used widely in nuclear power is designed with atmospheric exhaust regulating valve.2, the structure integrated multilevel pressure control device effectively solves
Exhaust valve pressure release noise, isocon is connected to exhaust outlet in multistage pressure control device.3, this structure silencer can be generalized to other
Generating set high temperature and pressure high flow capacity and displacement noise pollution control to whole steam fluids, cost performance are extremely being joined
There are comparative advantages under ring of numbers border.4, the present invention is maintaining nuclear power projects energy-saving and environment-friendly meanwhile, it is capable to reduce noise, improves ring
Border quality, applicability are extensive.
The present invention relates to a kind of nuclear power silencer, including silencer multistage pressure control structure, support construction, drainage arrangement,
Sound absorber and protective device.Multistage pressure control structure includes internal multi-stage pressure control noise elimination structure, multi-pipeline discharge pressure control noise elimination
Structure is all made of array of orifices structure；The aperture mode of aperture have noise spectrum shift frequency effect, multilevel decompression structure have by
The effect of grade regulation pressure release.Sound absorber has the effect for improving noise spectrum characteristics, and drainage arrangement, protective device play
Ensure the effect of equipment operational safety and Environmental security.Integral device can efficiently solve the problems, such as steam drain pressure release noise reduction, and
With good intensity and corrosion resistance, meet the standard criterion requirement of nuclear power high security.The present invention is solving exhaust outlet drop
While problem of making an uproar, system is stablized persistently, and manpower maintenance cost is low, agrees with the requirement of national energy-saving environmental protection development, is suitble to all kinds of
The exhaust noise of nuclear power unit atmospheric steam exhaust regulating valve or similar valve (group) is administered
Silencer nuclear structure is the multistage pressure control device 5-8 for being directly connected for reducing noise with atmospheric vent, multistage control
Pressure device is divided into level Four, including level-one-restricting orifice 5, the main isocon 6 of second level-, three-level-multilayer pressure control cylinder 7, level Four-pair point
Flow tube 8 is equipped with the stream in multiple and different apertures wherein two to multiple cavities 6-8 is equipped in level Four pressure control in each cavity
Hole.
The main isocon 6 of second level-is directly connected to atmospheric vent, level-one-restricting orifice.
Level-one-restricting orifice 5 is set in the main isocon 6 of second level-, is placed between main isocon and atmospheric vent.
Three-level-multilayer pressure control cylinder is divided into three layers in this example, is set to main 6 outside of isocon of second level-.
Level Four-pair isocon is directly connected to main steam safety valve.
Multistage Control pressure device circumference uniform distribution is arranged in main 6 periphery of isocon of second level-, and axial symmetry two-by-two；Level Four-pair point
For the equal orifice aperture of flow tube according to safety valve medium and fluid drainage parameter setting, centre frequency is distributed in the area 4000-8000Hz
Domain.
The centre frequency of multiple cavities is from the air inlet of multistage pressure control device 5-8 to outlet extreme direction by low frequency to high frequency
Rate successively changes.
Cavity is five, includes the equal discharge orifice that multiple diameters are 6-20mm, the center of five cavitys in each cavity
Frequency is respectively 980Hz, 2000Hz, 3200Hz, 4350Hz and 5230Hz.
Cavity body structure can increase and decrease, adjustable to meet feature medium and fluid parameter emission request, centre frequency
Control, need distribution in the core spectral regions that control (such as 250Hz, 500Hz, 1000Hz, 2000Hz, 4000Hz,
8000Hz).
Supporting leg 1 as support construction is fixed on foundation of civil work, support using the big mouth caliber leg seat form of array with
Skirt composite structure form or in which single structure.
Drainage arrangement includes drain port 3 and catch tray 2.Its drainage arrangement meets steam discharge fluid media (medium) by winter extreme low temperature
Effective discharge of water is condensed under environment, and meets draining experiment condition on this basis.
Auxiliary sound absorber includes investing absorbent treatment 9 on shell 10 and resistive sound absorber 11 and its support construction.
Shell and inner sound absorption device arrangement influence the generation spectrum distribution of the distribution of silencer fluid flow rate and regenerated noise,
Using concentric ring arrangement, perhaps parallel-plate type arrangement can use single layer or more to one layer of resistive sound absorber 11 in shell 10
Layer structure, multilayered structure can wrong ring (column) or arranged crosswise forms.
Assist sound absorber noise spectrum by 63Hz, 125Hz, 250Hz, 500Hz, 1000Hz, 2000Hz, 4000Hz,
8000Hz determines the sound deadening capacity of structure, and be distributed with being needed according to the parameter of nuclear power unit and the design of atmos-valve exhaust system
Core spectral regions make the acoustic characteristic of silencer meet equipment rule to determine the auxiliary effective bound frequency of sound absorber
Model requirement.
Protective device includes rain cover 14 and anti-bird net 13, and rain cover is combined with anti-bird net is spirally connected or is welded in shell 10,
Rain cover using wedge-shape diversion structure and with auxiliary silencing plate (absorbent treatment and protection slab)) altogether structure.
Claims (10)
1. a kind of multistage pressure control complex muffler, it is characterised in that: including being tightly connected, being fixedly mounted on big by supporting leg
Shell outside gas exhaust outlet, housing cavity middle part are provided with the main isocon that can be connected to discharge tube, main shunting tube top
End seal is closed, and lower end is fixedly connected in atmospheric vent, and main shunting tube cavity lower end is provided with restricting orifice, constitutes level-one pressure control
Structure；Main shunting wall portion throughout there is several circular through holes, constitutes second level pressure control structure from top to bottom；Outside main isocon middle section
It being coaxially disposed, is fixedly connected with multilayer pressure control cylinder, the height of multilayer pressure control cylinder, diameter are sequentially increased by sequence from inside to outside,
From top to bottom also throughout there is several circular through holes on the barrel of every layer of pressure control cylinder, the circular through hole on adjacent two layers pressure control cylinder barrel
It is staggeredly spaced apart, constitutes labyrinth channel type three-level pressure control structure, multilayer pressure control cylinder constitutes multiple with main isocon inner space
The centre frequency of pressure control chamber, multiple pressure control chambers is successively increased by sequence from inside to outside；Housing cavity is set close to the position at top
It is equipped with resistive sound absorber, the part that housing sidewall inner surface is located at below resistive sound absorber is provided with absorbent treatment, is located at resistive suction
Part above sound body is provided with anti-bird net, and case top is provided with rain cover.
2. multistage pressure control complex muffler according to claim 1, it is characterised in that: same outside the main isocon middle section
Axis setting is fixedly connected with four layers of pressure control cylinder, wherein being located at the top of three layers of pressure control cylinder of inside, bottom is all spherical surface, outermost
Pressure control cylinder top, bottom are all plane.
3. multistage pressure control complex muffler according to claim 2, it is characterised in that: four layers of pressure control cylinder, main shunting
Pipe inner space constitutes five pressure control chambers, and the centre frequency of five pressure control chambers is successively increased by sequence from inside to outside, respectively
980Hz, 2000Hz, 3820Hz, 4350Hz and 5230Hz.
4. multistage pressure control complex muffler according to claim 1, it is characterised in that: the housing bottom is spherical surface, shell
The absorbent treatment thickness of body bottom interior surface is greater than the absorbent treatment thickness of side wall inner surfaces.
5. multistage pressure control complex muffler according to claim 1, it is characterised in that: the housing cavity is located at main shunting
Secondary isocon, secondary isocon top closure are provided on position on the outside of pipe, bottom end is fixedly connected in atmospheric vent, pair point
Flow tube wall portion also throughout there is several circular through holes, constitutes level Four pressure control structure from top to bottom.
6. multistage pressure control complex muffler according to claim 5, it is characterised in that: the housing cavity is provided with more
Secondary isocon, more secondary isocons are distributed uniformly and circumferentially, are arranged around main isocon.
7. multistage pressure control complex muffler according to claim 1, it is characterised in that: logical outside the main isocon lower end
It crosses sealing device and is connected with drain port, be provided with catch tray below drain port.
8. multistage pressure control complex muffler according to claim 1, it is characterised in that: the hull outside corresponds to resistive
The position of sound absorber is fixedly connected with lifting lug.
9. multistage pressure control complex muffler according to claim 1, it is characterised in that: the absorbent treatment, resistive sound absorber
Material is mineral wool.
10. multistage pressure control complex muffler according to claim 1, it is characterised in that: the main isocon, multilayer pressure control
Barrel portion circular through hole diameter is 6~20mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910031257.6A CN109767747A (en) | 2019-01-14 | 2019-01-14 | A kind of multistage pressure control complex muffler |
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| CN201910031257.6A CN109767747A (en) | 2019-01-14 | 2019-01-14 | A kind of multistage pressure control complex muffler |
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| CN201910031257.6A Pending CN109767747A (en) | 2019-01-14 | 2019-01-14 | A kind of multistage pressure control complex muffler |
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| CN (1) | CN109767747A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100939702B1 (en) * | 2009-11-06 | 2010-02-01 | 한국방진방음 주식회사 | High noise reduction silencer for industrial use |
| RU2491427C1 (en) * | 2012-03-22 | 2013-08-27 | федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВПО "НИУ МЭИ") | Exhaust steam jet silencer (versions) |
| CN204187199U (en) * | 2014-09-12 | 2015-03-04 | 中国能源建设集团镇江华东电力设备制造厂 | Nuclear power atmospheric rilief valve silencing apparatus |
| CN204493972U (en) * | 2015-02-09 | 2015-07-22 | 杭州杭氧换热设备有限公司 | A kind of high-pressure and high-temperature steam air releasing silencer |
| CN204926786U (en) * | 2015-08-13 | 2015-12-30 | 谢汝兴 | Multistage combined type muffler |
| CN107044326A (en) * | 2017-06-01 | 2017-08-15 | 连云港久盛电力辅机有限公司 | A kind of nuclear power generating sets muffler |
| CN207406246U (en) * | 2017-11-08 | 2018-05-25 | 金美玉 | Novel combined eight grades of mufflers |
| CN209928970U (en) * | 2019-01-14 | 2020-01-10 | 镇江华东电力设备制造厂有限公司 | Multi-stage pressure control combined muffler |
-
2019
- 2019-01-14 CN CN201910031257.6A patent/CN109767747A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100939702B1 (en) * | 2009-11-06 | 2010-02-01 | 한국방진방음 주식회사 | High noise reduction silencer for industrial use |
| RU2491427C1 (en) * | 2012-03-22 | 2013-08-27 | федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВПО "НИУ МЭИ") | Exhaust steam jet silencer (versions) |
| CN204187199U (en) * | 2014-09-12 | 2015-03-04 | 中国能源建设集团镇江华东电力设备制造厂 | Nuclear power atmospheric rilief valve silencing apparatus |
| CN204493972U (en) * | 2015-02-09 | 2015-07-22 | 杭州杭氧换热设备有限公司 | A kind of high-pressure and high-temperature steam air releasing silencer |
| CN204926786U (en) * | 2015-08-13 | 2015-12-30 | 谢汝兴 | Multistage combined type muffler |
| CN107044326A (en) * | 2017-06-01 | 2017-08-15 | 连云港久盛电力辅机有限公司 | A kind of nuclear power generating sets muffler |
| CN207406246U (en) * | 2017-11-08 | 2018-05-25 | 金美玉 | Novel combined eight grades of mufflers |
| CN209928970U (en) * | 2019-01-14 | 2020-01-10 | 镇江华东电力设备制造厂有限公司 | Multi-stage pressure control combined muffler |
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