CN102537993A - Chimney with spiral flow guide plate on outer wall - Google Patents
Chimney with spiral flow guide plate on outer wall Download PDFInfo
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- CN102537993A CN102537993A CN2012100710393A CN201210071039A CN102537993A CN 102537993 A CN102537993 A CN 102537993A CN 2012100710393 A CN2012100710393 A CN 2012100710393A CN 201210071039 A CN201210071039 A CN 201210071039A CN 102537993 A CN102537993 A CN 102537993A
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- deflector
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Abstract
The invention relates to a chimney with a spiral flow guide plate on an outer wall. A spiral flow guide plate is arranged on the outer wall of a steel structural chimney and used for guiding gas flow produced by high-speed wind to partially spirally ascend and partially reversely rotate, and a transverse wind load produced by the gas flow which acts on the outer wall of the chimney is reduced and counteracted, so that the bending strength of the outside of the chimney under the condition that the structure of the chimney has a large height-to-width ratio is enhanced, the transverse displacement and the distortion of the chimney are reduced, and the structural safety of the chimney is ensured.
Description
Technical field
The present invention relates to a kind of chimney of outer wall belt spiral guiding plate, specifically a kind of equipment that is provided with the smoke discharging of spiral guiding plate at the chimney outer wall.
Technical background
Chimney is widely used in metallurgy, machinery, and water conservancy and hydropower, chemical industry etc. are planted in the industry, and its main purpose is in order to realize the high altitude discharge of harmful smoke, dust, to reduce the pollution to ground.To achieve these goals, the development trend of current this technical field is to increase the chimney overall height, improves fume emission speed, or adopts the chimney stack structure to concentrate discharging.Because chimney belongs to tall and slender structure, be a kind of towering elongated flexible structure of circular cross-section, its height dimension and lateral dimension bigger, thus the bending strength of chimney relatively a little less than.Chimney belongs to the vertical type tower structure in the tall and slender structure, and the load of mainly bearing is the wind load that high-altitude, spacious geographical environment produce, and shows according to the interrelated data statistics; In all natural calamities; Disaster caused by a windstorm is the most serious a kind of, and the occurrence frequency of wind is quite high, and secondary disaster is also bigger.Chimney is except equally receiving the down wind wind load as structure, also receives owing to whirlpool periodically comes off the beam wind that causes to load etc.When certain rank natural frequency of vibration of vortex shedding frequency and chimney structure is identical, just resonance response can take place.Through the wind bending moment at each the absolute altitude place more than the contrast chimney 80m, can know that the influence that the beam wind load produces is the trend that progressively strengthens from the bottom to top along with chimney height.Chimney in use under wind action, especially under the wind-force situation that perhaps local wind speed is bigger, is found rocking of not clear situation, and amplitude is very big.The effect of long-term wind load can cause the broken ring of the fracture of flange high-strength bolt, and high-strength bolt need regularly replace and replenish.Find through analyzing: the external diameter of chimney makes that along the short transverse no change steel stack bottom bending rigidity is less, and the ratio of height to diameter of chimney is excessive, and the natural frequency of vibration of chimney is less than normal, under the effect of transverse load, is easy to produce bigger vibration and displacement.Therefore, the wind force proofing design of chimney structure is the important content in its structural design.
The chimney stack surface is after accepting wind action, and not only down wind produces wind-force, simultaneously at the perpendicular wind-force that laterally also produces.In putting into practice engineering; Usually wind-force is divided into even wind (long period composition) and fluctuating wind (short period composition) is analyzed, evenly wind action is used for calculating by static(al), and the pulsation wind action is still pressed masterpiece and is used for calculating; Thereby the wind load of long period composition is equivalent to the static(al) effect; The wind load of short period composition then is a dynamic action, causes the vibration of chimney jointly.Because wind load is infinite variation on room and time; Therefore it also is very complicated to the action effect of chimney structure; Except the dead load of long period composition and short period composition wind load generation with the dynamic loading, chimney also can produce misfortune stream after accepting wind.Misfortune stream has certain frequency or cycle, thereby forms the beam wind dynamic action, produces oscillation crosswise, and when it produced resonance, chimney stack itself will produce very big strong vibration, makes chimney part unstability or tired the breaking-up.
Deflector is one of heat subject of a plurality of industry research such as automobile, navigation, aviation, and the equipment of known application deflector is a lot, all has characteristics separately.、
Disclosed deflector among the CN10102720A; Relate to the deflector that is used for roof; It supports removablely between resting position and POF by means of supporting arrangement, and wherein this supporting arrangement comprises a spring assembly to deflector prestrain in open POF.That this deflector can make is open, can the adaptive speed of a motor vehicle have better kinetic characteristic.
Disclosed spiral smoke deflector among the CN1420304A; Drip the several piece independence deflector that the shape that rises twist in the separator arranges and form by being set up in catching of wet process of FGD dust pelletizing system; Every deflector is all supposed catching between a tube and the centrifugal post, presses the certain angle spiral around centrifugal post and rises.This deflector rises in order to guiding high speed flue gas stream helical form, thereby the effect of damming of enhanced system eddy flow improves eddy flow to grey water droplet and the sedimentary trapping ability of damming, and then improves the bulk devulcanization efficiency of dust collection of system.This deflector is discontinuous absolute construction, is installed on inner wall of stack, is mainly used in dedusting.
Disclosed chimney inlet lower resistance guiding device among the CN2069072U; It is the deflector that increases the conic section type at the smoke inlet place of chimney, and its inlet angle is 0～5 °, and the angle of outlet is 50～85 °; Be symmetric form and asymmetric two kinds; Chimney both sides load equates, adopts symmetric form, otherwise adopts asymmetric.By armored concrete or metal forming manufacturing.This one section shape deflector structure that is installed on the chimney porch can make that the radial direction VELOCITY DISTRIBUTION of chimney porch is even; Reduced chimney bottom flow resistance; The chimney drag overall is descended more than 118 handkerchiefs, not only reduced the blower fan power consumption, and improved the blower fan working environment.
From the above, although known disclosed deflector technology is numerous, do not have one to be that to be used to solve the chimney ratio of height to diameter excessive, bending strength is low, lateral displacement and problem on deformation.In order to solve the shortcoming of the anti-beam wind load-carrying ability of traditional chimney difference; The present invention replaces the method that traditional chimney uses reinforcement; On the chimney outer wall, set up spiral guiding plate first; Strengthen the bending strength of chimney outside under the wide bigger situation of self structure height, promptly reduce the lateral displacement and the distortion of chimney, guarantee the structural safety of chimney.
Summary of the invention
The chimney that the purpose of this invention is to provide a kind of outer wall belt spiral guiding plate; Be a kind ofly to be provided with air-flow that spiral guiding plate is used to guide high speed winds to produce at steel construction chimney outer wall and to be the part helical form and to rise; The part reversed turning; Reduction and counteracting are by the beam wind load that air-flow produced that acts on the chimney revolution outer wall; Thereby strengthen the bending strength of chimney outside under the wide bigger situation of self structure height, promptly reduce the lateral displacement and the distortion of chimney, guarantee the structural safety of chimney.
The present invention realizes by following technical scheme; It comprises deduster 1, guardrail 2, workbench 3, gusset 4, chimney stack 5, deflector 6, connecting flange 7, flange gusset 8 and ventilation aperture plate 9; The top that described deduster 1 is installed in chimney stack 5 is communicated with chimney body 5 couplings, and chimney stack 5 is linked with connecting flange 7 by a few joint chimneys, is fixed on deduster 1 periphery after workbench 3 frocks; 5 welding are connected with the chimney body with it with gusset 4 below the workbench 3; Guardrail 2 is welded in workbench 3 outers, and deduster 1, workbench 3, chimney stack 5 are in together on the axis, below workbench 3, have ventilation aperture plate 9; Deflector 6 is and is welded in uniformly continuously on chimney stack 5 outer walls; Left-handed or dextrorotation rises to the below of top workbench 3 from the bottom around chimney stack 5 outer walls for it, between connecting flange 7 and chimney stack 5, is welded with flange gusset 8, and connecting flange 7 is fixed through Bolt Connection.
Described chimney stack 5 is a steel construction, and diameter D2 is 1～1.5m, and chimney stack wall thickness h is 16-20mm, and the length L of every joint chimney is 10～15m, connects to chimney stack 5 by a few joint chimneys with connecting flange 7,
Described deflector 6 pitch P are 0.3～0.5m, thickness H
2Be 10mm, width B
2Be 0.25m～0.30m, the helical angle angle [alpha] is 25 °～55 °.
Operation principle of the present invention: when chimney stack 5 surfaces received wind load, air-flow at first contacted deflector 6, under the effect of deflector 6; Rise around the outer 5 wall spirals of chimney stack; A part flows out from workbench 3 tops through ventilation aperture plate 9 straight up, converts transverse load into longitudinal loading; Part air-flow returns around chimney stack 5 spirals along deflector 6 and circles, and forms the revolution air-flow, flows out with the direction opposite with wind load, has resisted and offset the power of part wind action on chimney stack.
Advantage that the present invention compared with prior art has and good effect
1) spiral guiding plate can improve the resistance ability of chimney to meteorological condition, and promptly when ambient wind velocity of living in increased, the air-flow that the guiding high speed winds produces shape in the shape of a spiral rose, and reduced acting on the beam wind load that air-flow produced on the chimney outer wall.
2) it is outside that spiral guiding plate is welded in the chimney wall; Play the effect of reinforcement; Further strengthening the bending strength of chimney outside under the wide bigger situation of self structure height on the basis of water conservancy diversion, promptly reduce the lateral displacement and the distortion of chimney, guarantee the structural safety of chimney.
3) rise along the deflector spiral and pass the air-flow of ventilation aperture plate, help to make the flue gas flow rate that produces in the dust arrester even, reduce dust discharge rate and pernicious gas flooring concentration.
4) can prolong the chimney whole height through connecting flange 7 according to engine request and surrounding enviroment constraint, adapt to production environment, job requirement.
5) according to engine request and surrounding enviroment constraint, deflector also can be designed to 1 or many helix structures, and deflector can be designed to left-handed or different production environment, job requirement are satisfied in dextrorotation.
Description of drawings
Accompanying drawing 1 is the front view of composition structure of the present invention.Wherein, 1 is deduster, and 2 is guardrail, and 3 is workbench, and 4 is gusset, and 5 is chimney stack, and 6 is deflector, and 7 is connecting flange, and 8 is the flange gusset;
Accompanying drawing 2 is the A-A cutaway view Amplified image of accompanying drawing 1.Wherein, 9 are the ventilation aperture plate;
Accompanying drawing 3 carries the water conservancy diversion schematic diagram for wind of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described:
Embodiment 1: a kind of chimney of outer wall belt spiral guiding plate comprises deduster 1, guardrail 2, workbench 3, gusset 4, chimney stack 5, deflector 6, connecting flange 7, flange gusset 8, ventilation aperture plate 9.The top that described deduster 1 is installed in chimney stack 5 is communicated with chimney body 5 couplings; Chimney stack 5 is linked with connecting flange 7 by a few joint chimneys; Be fixed on deduster 1 periphery after workbench 3 frocks, workbench 3 following welding with chimney body 5 with it with gusset 4 are connected, and guardrail 2 is welded in workbench 3 outers; Deduster 1, workbench 3, chimney stack 5 are in together on the axis; Below workbench 3, have ventilation aperture plate 9, deflector 6 is and is welded in uniformly continuously on chimney stack 5 outer walls, and left-handed or dextrorotation rises to the below of top workbench 3 from the bottom around chimney stack 5 outer walls for it; Between connecting flange 7 and chimney stack 5, be welded with flange gusset 8, connecting flange 7 is fixed through Bolt Connection.
The chimney stack diameter is 1m, and the length of every joint chimney stack is 10m.Deflector 6 pitch are 0.3m, and width is 0.25m, and the helical angle angle [alpha] is 25 °.
Embodiment 1 is carried out the water conservancy diversion principle analysis; Wind load vertically blows to chimney stack left; The part air-flow rises along deflector 6 left-hand screws, forms along deflector 6 ascending airs, and the part air-flow turns round around chimney stack 5 in the process that rises along deflector 6 left-hand screws; Behind chimney stack 5 one circles, form revolution air-flow to the right.Flow out from workbench 3 tops through ventilation aperture plate 9 along deflector 6 ascending airs, convert transverse load into longitudinal loading, alleviated the pressure that wind load produces chimney stack 5; Revolution air-flow to the right and vertical left blow to the wind load outflow in the opposite direction of chimney stack 5, carry the chimney stack 5 lip-deep power that act on thereby resist and offset wind.At this moment, chimney is under wind load action, and vertical and horizontal displacement is all very little, and promptly the amplitude of chimney is very little, and overall structure is safer.
Embodiment 2: it is identical with example 1 to form structure.
Chimney stack diameter D
2=1.5m, the length L=15m of every joint chimney stack 5.Deflector 6 pitch P=0.5m, width B
2=0.35m, helical angle angle [alpha]=45 °.
This guiding function through chimney outer wall deflector makes the load of high speed winds generation be the rising of part helical form; The part reversed turning; Reduction and counteracting are by the beam wind load that air-flow produced that acts on the chimney revolution outer wall; Thereby strengthen the bending strength of chimney outside under the wide bigger situation of self structure height, promptly reduce the lateral displacement and the distortion of chimney, guarantee the structural safety of chimney.
Claims (3)
1. the chimney of an outer wall belt spiral guiding plate; It is characterized in that: it is realized by following technical scheme; It comprises deduster (1), guardrail (2), workbench (3), gusset (4), chimney stack (5), deflector (6), connecting flange (7), flange gusset (8) and ventilation aperture plate (9); The top that described deduster (1) is installed in chimney stack (5) is communicated with chimney body (5) coupling, and chimney stack (5) is linked with connecting flange (7) by a few joint chimneys, is fixed on deduster (1) periphery after workbench (3) frock; Welding is connected with chimney body (5) with it with gusset (4) below the workbench (3); Guardrail (2) is welded in workbench (3) edge, and deduster (1), workbench (3), chimney stack (5) are in together on the axis, below workbench (3), have ventilation aperture plate (9); Deflector (6) is and is welded in uniformly continuously on chimney stack (5) outer wall; Left-handed or dextrorotation rises to the below of top workbench (3) from the bottom around chimney stack (5) outer wall for it, between connecting flange (7) and chimney stack (5), is welded with flange gusset (8), and connecting flange (7) is fixed through Bolt Connection.
2. the chimney of described outer wall belt spiral guiding plate according to claim 1 is characterized in that: chimney stack (5) is a steel construction, diameter D
2Be 1～1.5m, chimney stack wall thickness h is 16-20mm, and the length L of every joint chimney is 10～15m, connects to chimney stack (5) by a few joint chimneys with connecting flange (7).
3. the chimney of described outer wall belt spiral guiding plate according to claim 1 is characterized in that: described deflector (6) pitch P is 0.3～0.5m, thickness H
2Be 10mm, width B
2Be 0.25m～0.30m, the helical angle angle [alpha] is 25 °～55 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100710393A CN102537993A (en) | 2012-03-19 | 2012-03-19 | Chimney with spiral flow guide plate on outer wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100710393A CN102537993A (en) | 2012-03-19 | 2012-03-19 | Chimney with spiral flow guide plate on outer wall |
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| Publication Number | Publication Date |
|---|---|
| CN102537993A true CN102537993A (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100710393A Pending CN102537993A (en) | 2012-03-19 | 2012-03-19 | Chimney with spiral flow guide plate on outer wall |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11141083A (en) * | 1997-11-07 | 1999-05-25 | Shuichi Matsuoka | Chimney-and-spiral staircase |
| CN201074423Y (en) * | 2007-07-19 | 2008-06-18 | 沈阳铝镁设计研究院 | Disturbed flow steel smokestack |
| RU2384793C2 (en) * | 2008-11-27 | 2010-03-20 | Александр Михайлович Гультяев | Stack |
| CN202081697U (en) * | 2011-05-23 | 2011-12-21 | 西安成达工业锅炉设备制造有限公司 | Steel self-anchorage chimney without wind rope |
-
2012
- 2012-03-19 CN CN2012100710393A patent/CN102537993A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11141083A (en) * | 1997-11-07 | 1999-05-25 | Shuichi Matsuoka | Chimney-and-spiral staircase |
| CN201074423Y (en) * | 2007-07-19 | 2008-06-18 | 沈阳铝镁设计研究院 | Disturbed flow steel smokestack |
| RU2384793C2 (en) * | 2008-11-27 | 2010-03-20 | Александр Михайлович Гультяев | Stack |
| CN202081697U (en) * | 2011-05-23 | 2011-12-21 | 西安成达工业锅炉设备制造有限公司 | Steel self-anchorage chimney without wind rope |
Non-Patent Citations (2)
| Title |
|---|
| 崇惠萍: "钢烟囱横风向风振的防止", 《江苏工业学院学报》 * |
| 王军娃: "天津某90m高钢烟囱的加固设计", 《特种结构》 * |
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Application publication date: 20120704 |