CN117027904B - Method for controlling dust flow of air duct - Google Patents
Method for controlling dust flow of air duct Download PDFInfo
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- CN117027904B CN117027904B CN202311074607.XA CN202311074607A CN117027904B CN 117027904 B CN117027904 B CN 117027904B CN 202311074607 A CN202311074607 A CN 202311074607A CN 117027904 B CN117027904 B CN 117027904B
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- 239000000428 dust Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012821 model calculation Methods 0.000 claims description 8
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 5
- 239000003063 flame retardant Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 19
- 239000003245 coal Substances 0.000 description 4
- 238000005065 mining Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 208000028571 Occupational disease Diseases 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/20—Drawing-off or depositing dust
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Air-Flow Control Members (AREA)
Abstract
The invention discloses a wind barrel uniform dust control method, which uses a wind barrel uniform dust control device, the wind barrel uniform dust control device comprises a wind barrel inner pipe and a wind barrel outer pipe, the wind barrel inner pipe comprises a wind barrel air inlet, an inner pipe radial air outlet and a wind barrel axial air outlet, the wind barrel outer pipe comprises an outer pipe radial air outlet, and the invention further comprises: the inner tube radial air outlet is formed on one side of the inner wall of the air duct inner tube, the flow equalization and dust control method is based on an Ansys Fluent numerical model to calculate and establish flow equalization formulas when different air inlet wind speeds are established, the air outlet speeds are uniform and approximately equal by adjusting the air outlet sizes of the inner tube radial air outlet and the outer tube radial air outlet, and the problems that the existing wall-attached air duct is simple in structural design, the formed airflow field is unreasonable, the dust control effect is poor, the air outlet quantity of the air flow at the front end air hole is large, the air outlet quantity of the rear end air hole is small, the dust equalization and dust control cannot be realized, and the dust fall effect is influenced are solved.
Description
Technical Field
The invention relates to the technical field of air distribution and dust control of a fully-mechanized coal mining face wall-attached air duct, in particular to an air duct uniform dust control method.
Background
In recent years, along with the continuous improvement of the mechanization degree of coal mines, the high-power cutting equipment is widely applied to tunneling production, the production efficiency is improved, the concentration of working flour dust is seriously out of standard, and serious occupational disease harm is brought to operators. In order to prevent the occurrence of the harmful phenomena, a wall-attached air duct is arranged above most of the domestic heading machines, however, the wall-attached air duct commonly used at present has the following problems: the existing coanda wind tunnel is simple in structural design, the formed airflow field is not reasonable enough, the dust control effect is poor, the air output of the front end wind tunnel is large, the air output of the rear end wind tunnel is small, the dust control cannot be realized, and the dust settling effect is affected.
In view of the problems, the invention provides a method for controlling dust in an air duct. Firstly, forming a good airflow field through a dust control device of an air duct, and effectively controlling dust in a specified area; secondly, according to the change of the on-site wind flow condition, the size of the air outlet of the inner pipe and the outer pipe of the air duct is adjusted, so that the wind flow flowing out of the radial air outlet of the outer pipe of the whole air duct is uniform and approximately equal; finally, based on Ansys Fluent numerical model calculation, a flow equalization formula is established when different air inlet wind speeds are established, and the uniform and approximately equal air speed of the radial air outlet of the outer tube is realized by adjusting the radial air outlet size of the inner tube and the outer tube of the air tube. The invention has simple structure, good dust control effect, strong universality and higher application value.
Disclosure of Invention
The invention aims to provide a method for controlling dust uniformly by using an air duct, which aims to solve the problems that the existing wall-attached air duct is simple in structural design, the formed airflow field is not reasonable enough, the dust control effect is poor, the air output of an air flow at the front end of the air duct is large, the air output of an air hole at the rear end of the air duct is small, dust uniformly controlling cannot be realized, and the dust reducing effect is affected.
In order to achieve the above purpose, the present invention provides the following technical solutions: the dust control device comprises an inner tube of the air duct and an outer tube of the air duct, wherein the inner tube of the air duct comprises an air inlet of the air duct, a radial air outlet of the inner tube and an axial air outlet of the air duct, and the outer tube of the air duct comprises a radial air outlet of the outer tube;
further comprises:
the inner tube radial air outlet is formed in one side of the inner wall of the inner tube of the air duct, the air inlet of the air duct is positioned at one end of the inner tube of the air duct, and the axial air outlet of the air duct is positioned at the other end of the inner tube of the air duct;
the outer tube of the air duct is arranged at the outer side of the inner tube of the air duct, and a radial air outlet of the outer tube is arranged at one side of the inner wall of the outer tube of the air duct;
preferably, the cross section of the inner pipe radial air outlet is trapezoid, the width of the inner pipe radial air outlet is linearly increased from the air inlet of the air duct to the axial air outlet of the air duct, and the size of the inner pipe radial air outlet can be adjusted according to the flow equalizing requirement of the outer pipe radial air outlet;
by adopting the technical scheme, the wind speed of the air inlet of the air duct is measured according to the actual condition of the site, and the size of the radial air outlet of the inner pipe or the radial air outlet of the outer pipe can be selected for adjustment, so that the uniform and approximately equal wind flow of the radial air outlet of the outer pipe of the whole air duct is realized, the dust control effect of the fully-mechanized coal mining working face is improved, and the using effect of the device is better;
preferably, the cross section of the outer tube radial air outlet is rectangular, the size of the outer tube radial air outlet can be adjusted according to the flow equalizing requirement of the outer tube radial air outlet, and the opening direction of the inner tube radial air outlet and the outer tube radial air outlet forms an angle of one hundred eighty degrees;
by adopting the technical scheme, a good airflow field is formed conveniently, and dust is controlled in a specified area effectively;
preferably, the length of the inner tube of the air duct is consistent with that of the outer tube of the air duct, the inner tube of the air duct and the outer tube of the air duct are concentrically arranged, and the axes of the inner tube of the air duct and the outer tube of the air duct are completely coincident;
by adopting the technical scheme, the subsequent matching work of the inner tube and the outer tube of the air duct is facilitated, and the flow equalizing effect can be better realized;
preferably, the top of the air duct outer tube and the air duct inner tube are arranged to be of a closed structure, and the air duct inner tube and the air duct outer tube are all composed of flame-retardant and antistatic air duct cloth;
by adopting the technical scheme, the air duct cloth made of flame-retardant and antistatic materials improves the flame retardant property and antistatic property of the device, so that the service life of the device is longer;
the flow equalization and dust control method is to establish a flow equalization formula when different air inlet wind speeds are calculated and established based on an Ansys Fluent numerical model, and the uniform and approximately equal air outlet speeds of the radial air outlet of the outer pipe are realized by adjusting the air outlet sizes of the radial air outlet of the inner pipe and the radial air outlet of the outer pipe;
the dust control method for the air duct comprises the following steps of:
step one, based on Ansys Fluent numerical model calculation, establishing a flow equalization formula when different wind speeds of the air inlet are achieved:
s1: setting a solution initial condition: the values of the upper bottom a of the radial air outlet of the inner tube are 0.11, 0.13, 0.14, 0.15 and 0.16m, and the values of the lower bottom b of the radial air outlet of the inner tube are 0.35, 0.38, 0.39, 0.4, 0.41 and 0.44m; the radial air outlet width c of the outer tube takes the values of 0.19, 0.21, 0.23, 0.25, 0.27, 0.29 and 0.31m;
s2: and (3) calculating a numerical model: taking a=0.15m, b=0.4m and c=0.25m as reference groups, sequentially changing values of a, b and c, carrying out numerical model calculation, and solving the air inlet wind speed v when the radial air outlet of the outer tube achieves flow equalization;
s3: establishing a flow equalizing formula when different wind speeds of the air inlets: according to the resolving result in the step S2, firstly fitting a functional relation between the upper bottom a of the radial air outlet of the inner tube and the air speed v of the air inlet of the air duct to obtain an exponential relation:the method comprises the steps of carrying out a first treatment on the surface of the Secondly, fitting a functional relation between the lower bottom b of the radial air outlet of the inner tube and the air speed v of the air inlet of the air duct to obtain a linear relation formula: />The method comprises the steps of carrying out a first treatment on the surface of the Finally, fitting a functional relation between the radial air outlet width c of the outer tube and the air speed v of the air inlet of the air duct to obtain a slogsticl relation: />。
Wherein a is the upper bottom size of the radial air outlet of the inner tube; b is the bottom dimension of the radial air outlet of the inner pipe; c is the radial air outlet width of the outer tube; v is the wind speed of the wind inlet of the wind barrel;
step two, the flow equalization implementation process of the radial air outlet of the outer tube comprises the following steps:
according to the actual condition of the site, the wind speed of the wind inlet of the wind barrel is measured, and one of the upper bottom of the radial air outlet of the inner pipe, the lower bottom of the radial air outlet of the inner pipe and the radial air outlet width of the outer pipe can be selected for adjustment, so that the uniform and approximately equal wind flow of the radial air outlet of the outer pipe of the whole wind barrel is realized;
compared with the prior art, the invention has the beneficial effects that: the invention can make the air flow from the radial air outlet of the air duct uniform and approximately equal, and improve the dust control effect of the fully-mechanized coal mining working face;
the device is provided with an inner tube of the air duct, an outer tube of the air duct, a radial air outlet of the inner tube and a radial air outlet of the outer tube, the air speed of an air inlet of the air duct is measured according to the actual condition of the site, the size of the radial air outlet of the inner tube or the radial air outlet of the outer tube can be selected for adjustment, and then the uniform and approximately equal air flow of the radial air outlet of the whole outer tube of the air duct is realized, the dust control effect of a fully-mechanized excavation face is improved, the using effect of the device is better, the problems that the existing wall-attached air duct is simple in structural design, the formed airflow field is unreasonable, the dust control effect is poor, the air flow is large in the air outlet of the front-end air hole, the air outlet of the rear-end air hole is small, the dust control cannot be uniformly carried out, and the dust reduction effect is influenced are solved.
According to the invention, based on the Ansys Fluent numerical model, a flow equalizing formula is established when different air inlet wind speeds are calculated, and the radial air outlet wind speeds of the outer pipe are uniform and approximately equal by adjusting the radial air outlet sizes of the inner pipe and the outer pipe of the air cylinder, so that the whole air cylinder has the effect of equalizing flow and controlling dust at different wind speeds.
Drawings
FIG. 1 is a schematic view of a first perspective overall structure of the present invention;
FIG. 2 is an exploded view of the overall structure of the present invention;
FIG. 3 is a schematic cross-sectional overall structure of the present invention;
FIG. 4 is a schematic diagram of the outer tube structure of the air duct of the invention;
FIG. 5 is a schematic diagram of the inner tube structure of the air duct of the present invention;
FIG. 6 is a schematic view of a second perspective overall structure of the present invention;
fig. 7 is a schematic view of a third perspective overall structure of the present invention.
In the figure: 1. an air inlet of the air duct; 2. an inner tube of the air duct; 3. an outer tube of the air duct; 4. an inner pipe radial air outlet; 5. radial air outlet of the outer tube; 6. the air duct is axially provided with an air outlet.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-7, the present invention provides a technical solution: the air duct uniform dust control method uses an air duct uniform dust control device, the air duct uniform dust control device comprises an air duct inner pipe 2 and an air duct outer pipe 3, the air duct inner pipe 2 comprises an air duct air inlet 1, an inner pipe radial air outlet 4 and an air duct axial air outlet 6, and the air duct outer pipe 3 comprises an outer pipe radial air outlet 5;
the inner tube radial air outlet 4 is formed on one side of the inner wall of the inner tube 2 of the air duct, the air inlet 1 of the air duct is positioned at one end of the inner tube 2 of the air duct, and the axial air outlet 6 of the air duct is positioned at the other end of the inner tube 2 of the air duct;
the outer tube 3 of the dryer is arranged at the outer side of the inner tube 2 of the dryer, and the radial air outlet 5 of the outer tube is arranged at one side of the inner wall of the outer tube 3 of the dryer;
the cross section of the inner pipe radial air outlet 4 is trapezoid, the width of the inner pipe radial air outlet 4 is linearly increased from the air inlet 1 of the air duct to the axial air outlet 6 of the air duct, and the size of the inner pipe radial air outlet 4 can be adjusted according to the flow equalizing requirement of the outer pipe radial air outlet 5.
The cross section of the outer pipe radial air outlet 5 is rectangular, the size of the outer pipe radial air outlet 5 can also be adjusted according to the flow equalizing requirement of the outer pipe radial air outlet 5, and the opening direction of the inner pipe radial air outlet 4 and the outer pipe radial air outlet 5 is at an angle of one hundred eighty degrees.
Embodiment one: as shown in fig. 1-3, fig. 5 and fig. 7, an inner tube 2, an outer tube 3, an inner tube radial air outlet 4 and an outer tube radial air outlet 5 are arranged, the air speed of the air inlet 1 of the air tube is measured according to the actual situation of the site, the size of the inner tube radial air outlet 4 or the outer tube radial air outlet 5 can be selected for adjustment, and then the air flow flowing out of the radial air outlet 5 of the whole air tube outer tube is uniform and approximately equal, so that the dust control effect of the fully-mechanized excavation working face is improved, the using effect of the device is better, the problems that the structure design of the existing wall-attached air tube is simple, the formed airflow field is unreasonable, the dust control effect is poor, the air outlet of the air flow at the front end air hole is large, the air outlet of the rear end air hole is small, the dust can not be uniformly controlled, and the dust reducing effect is influenced are solved.
The length of the inner tube 2 of the air duct is consistent with that of the outer tube 3 of the air duct, the inner tube 2 of the air duct is concentric with the outer tube 3 of the air duct, and the axes of the inner tube 2 of the air duct and the outer tube 3 of the air duct are completely coincident.
The top of the air duct outer tube 3 and the air duct inner tube 2 are arranged into a closed structure, and the air duct inner tube 2 and the air duct outer tube 3 are all composed of flame-retardant and antistatic air duct cloth.
The dust equalizing method is to solve and establish a flow equalizing formula when different air inlet wind speeds based on an Ansys Fluent numerical model, and realize uniform and approximately equal air outlet speeds of the outer radial air outlet 5 by adjusting the air outlet sizes of the inner radial air outlet 4 and the outer radial air outlet 5.
Embodiment two: as shown in fig. 4 and 6, the invention establishes a flow equalizing formula when different wind speeds of the air inlet based on Ansys Fluent numerical model calculation, and realizes uniform and approximately equal wind speeds of the radial air outlet 5 of the outer tube by adjusting the radial air outlet size of the inner tube and the outer tube of the air duct, so that the whole air duct has the effect of controlling dust uniformly under different wind speeds.
Working principle: when the device is used, firstly, as shown in fig. 1-7, step one, based on Ansys Fluent numerical model calculation, a flow equalization formula at different wind speeds of the air inlet is established:
s1: setting a solution initial condition: the values of the upper bottom a of the inner pipe radial air outlet 4 are 0.11, 0.13, 0.14, 0.15 and 0.16m, and the values of the lower bottom b of the inner pipe radial air outlet 4 are 0.35, 0.38, 0.39, 0.4, 0.41 and 0.44m; the width c of the radial air outlet 4 of the outer tube takes the values of 0.19, 0.21, 0.23, 0.25, 0.27, 0.29 and 0.31m;
s2: and (3) calculating a numerical model: taking a=0.15m, b=0.4m and c=0.25m as reference groups, sequentially changing values of a, b and c, carrying out numerical model calculation, and solving the air inlet wind speed v when the radial air outlet of the outer tube achieves flow equalization;
s3: establishing a flow equalizing formula when different wind speeds of the air inlets: according to the resolving result in the step S2, firstly, fitting a functional relation between the upper bottom a of the radial air outlet 4 of the inner pipe and the air speed v of the air inlet 1 of the air duct to obtain an exponential relation:the method comprises the steps of carrying out a first treatment on the surface of the Then, fitting a functional relation between the lower bottom b of the inner pipe radial air outlet 4 and the air speed v of the air inlet 1 of the air duct to obtain a linear relation formula: />The method comprises the steps of carrying out a first treatment on the surface of the Finally, fitting a functional relation between the width c of the radial air outlet 5 of the outer tube and the wind speed v of the air inlet 1 of the air duct to obtain a slogsticl relation: />。
Wherein a is the upper bottom size of the radial air outlet 4 of the inner tube; b is the lower bottom size of the radial air outlet 4 of the inner tube; c is the width of the radial air outlet 5 of the outer tube; v is the wind speed of the wind inlet 1 of the wind barrel.
The flow equalization implementation process of the radial air outlet 5 of the outer tube comprises the following steps:
according to the actual condition of the site, the wind speed of the air inlet 1 of the air duct is measured, and one of the upper bottom of the radial air outlet 4 of the inner pipe, the lower bottom of the radial air outlet 4 of the inner pipe and the radial air outlet 5 of the outer pipe can be selected for adjustment, so that the uniform and approximately equal wind flow of the radial air outlet 5 of the outer pipe of the whole air duct is realized.
What is not described in detail in this specification is prior art known to those skilled in the art.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (1)
1. The air duct uniform dust control method uses an air duct uniform dust control device, the air duct uniform dust control device comprises an air duct inner pipe (2) and an air duct outer pipe (3), the air duct inner pipe (2) comprises an air duct air inlet (1), an inner pipe radial air outlet (4) and an air duct axial air outlet (6), and the air duct outer pipe (3) comprises an outer pipe radial air outlet (5);
the inner tube radial air outlet (4) is formed in one side of the inner wall of the inner tube (2) of the air duct, the air inlet (1) of the air duct is positioned at one end of the inner tube (2) of the air duct, and the axial air outlet (6) of the air duct is positioned at the other end of the inner tube (2) of the air duct;
the air duct outer tube (3) is arranged at the outer side of the air duct inner tube (2), and the radial air outlet (5) of the outer tube is arranged at one side of the inner wall of the air duct outer tube (3);
the cross section of the inner pipe radial air outlet (4) is trapezoid, the width of the inner pipe radial air outlet (4) is linearly increased from the air inlet (1) of the air duct to the axial air outlet (6) of the air duct, and the size of the inner pipe radial air outlet (4) can be adjusted according to the flow equalizing requirement of the outer pipe radial air outlet (5);
the cross section of the outer tube radial air outlet (5) is rectangular, the size of the outer tube radial air outlet (5) can also be adjusted according to the flow equalizing requirement of the outer tube radial air outlet (5), and the opening direction of the inner tube radial air outlet (4) and the outer tube radial air outlet (5) is at an angle of one hundred eighty degrees;
the length of the air duct inner pipe (2) is consistent with that of the air duct outer pipe (3), the air duct inner pipe (2) and the air duct outer pipe (3) are concentrically arranged, the axes of the air duct inner pipe (2) and the air duct outer pipe (3) are completely overlapped, the top of the air duct outer pipe (3) and the air duct inner pipe (2) are of a closed structure, and the air duct inner pipe (2) and the air duct outer pipe (3) are all composed of flame-retardant and antistatic air duct cloth;
the flow equalization and dust control method is based on an Ansys Fluent numerical model to calculate and establish flow equalization formulas when different air inlet wind speeds, and the uniform and approximately equal air outlet speeds of the outer radial air outlet (5) are realized by adjusting the air outlet sizes of the inner radial air outlet (4) and the outer radial air outlet (5);
the dust control method for the air duct comprises the following specific use steps:
step one, based on Ansys Fluent numerical model calculation, establishing a flow equalization formula when different wind speeds of the air inlet are achieved:
s1: setting a solution initial condition: the values of the upper bottom a of the inner pipe radial air outlet (4) are 0.11, 0.13, 0.14, 0.15 and 0.16m, and the values of the lower bottom b of the inner pipe radial air outlet (4) are 0.35, 0.38, 0.39, 0.4, 0.41 and 0.44m; the width c of the radial air outlet (5) of the outer tube takes the values of 0.19, 0.21, 0.23, 0.25, 0.27, 0.29 and 0.31m;
s2: and (3) calculating a numerical model: taking a=0.15m, b=0.4m and c=0.25m as reference groups, sequentially changing values of a, b and c, carrying out numerical model calculation, and solving the air inlet wind speed v when the radial air outlet of the outer tube achieves flow equalization;
s3: establishing a flow equalizing formula when different wind speeds of the air inlets: according to the resolving result of the step S2, firstly, fitting a functional relation between the upper bottom a of the radial air outlet (4) of the inner pipe and the wind speed v of the air inlet (1) of the air duct to obtain an exponential relation:the method comprises the steps of carrying out a first treatment on the surface of the Then fitting the bottom b of the inner tube radial air outlet (4) and the wind speed v of the air inlet (1) of the air ductAnd (3) obtaining a linear relation by the functional relation between the two to obtain the following formula: />The method comprises the steps of carrying out a first treatment on the surface of the Finally, fitting a functional relation between the width c of the radial air outlet (5) of the outer tube and the wind speed v of the air inlet (1) of the air duct to obtain a slogsticl relation: />；
Wherein a is the upper bottom size of the radial air outlet (4) of the inner tube; b is the bottom size of the radial air outlet (4) of the inner tube; c is the width of the radial air outlet (5) of the outer tube; v is the wind speed of the wind cylinder air inlet (1);
step two, the flow equalization implementation process of the radial air outlet (5) of the outer tube:
according to the actual condition of the site, the wind speed of the air inlet (1) of the air duct is measured, one of the upper bottom of the radial air outlet (4) of the inner pipe, the lower bottom of the radial air outlet (4) of the inner pipe and the width of the radial air outlet (4) of the outer pipe can be selected for adjustment, and the uniform and approximately equal wind flow of the radial air outlet (5) of the outer pipe of the whole air duct is realized.
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| CN201334919Y (en) * | 2009-01-09 | 2009-10-28 | 中国矿业大学 | Flexible wall-attached air duct |
| AU2021100272A4 (en) * | 2021-01-16 | 2021-04-15 | Jiangxi Longzheng Technology Development Co., Ltd | Novel ultra-high strength rpc air duct pipe |
| CN112879066A (en) * | 2021-03-23 | 2021-06-01 | 山东科技大学 | Vortex-vortex two-domain wind dust control method and device for tunneling face |
| CN113266411A (en) * | 2021-06-17 | 2021-08-17 | 南通钜拓环保科技有限公司 | Air curtain flow guide dust control air duct |
| CN215486123U (en) * | 2021-06-29 | 2022-01-11 | 中天合创能源有限责任公司 | Wall-attached air duct |
| CN116291683A (en) * | 2023-03-14 | 2023-06-23 | 山东科技大学 | Intelligent dust control device and method for front-mounted air distribution of coal mine |
| CN116291684A (en) * | 2023-03-14 | 2023-06-23 | 山东科技大学 | Y-shaped double-vortex tunneling intelligent dust control device and gas control method |
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