CN206485112U - A kind of dust-absorbing blackboard - Google Patents
A kind of dust-absorbing blackboard Download PDFInfo
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- CN206485112U CN206485112U CN201621202223.7U CN201621202223U CN206485112U CN 206485112 U CN206485112 U CN 206485112U CN 201621202223 U CN201621202223 U CN 201621202223U CN 206485112 U CN206485112 U CN 206485112U
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- dust
- air pipe
- aspirating air
- blackboard
- purification system
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Abstract
The utility model provides a kind of dust-absorbing blackboard, and the dust-absorbing blackboard includes blackboard body, breather line, induced-draught fan and dust purification system.This dust-absorbing blackboard by induced-draught fan will be erasable during the chalk dust that produces quickly suction is arranged in the aspirating air pipe of blackboard body lateral edges and feather edge, purifying and dedusting is carried out subsequently into the dust purification system being connected with aspirating air pipe, calcium carbonate in chalk dust and calcium sulfate are removed, purified gas is input to finally by the air duct being connected with dust purification system and is arranged in the outlet pipe of blackboard body top edge, gas is discharged by outlet pipe, airflow circulating is formed.The active force mutual cooperation that the active force that outlet pipe is vented generation is produced with induced-draught fan, collectively promotes the chalk dust in air and rapidly enters purification in dust purification system, so as to effectively reduce the content of chalk dust in air, and then reduce the harm to human body.
Description
Technical field
The utility model is related to teaching aid field, more particularly to a kind of dust-absorbing blackboard.
Background technology
Chalk teaching aid is the indispensable instrument of current middle and primary schools' teaching, and chalk teaching is also most original, most traditional teaching side
One of method.In teaching process, teacher usually requires to write on blackboard, draws to explain, teach knowledge, but due to black
Plate plate face is limited, in a class of 40 minutes, it is possible to need it is erasable for several times.During erasable, a large amount of chalk dust drifts
Float in the air, teacher and the nearer student of seat distances blackboard inevitably contact or sucked chalk dust, right
The organs such as respiratory tract, lung and skin cause different degrees of harm.
At present, in order to reduce the extent of injury of chalk dust, common chalk is gradually replaced by dust-free chalk.Common flour
The main component of pen and dust-free chalk is calcium carbonate and calcium sulfate, and the particle diameter of calcium carbonate and calcium sulfate dust is larger, more 100
More than micron, the time of floating in the air is shorter, and can be by human body（Such as vibrissa）Stop or drain.But still there are a small number of particle diameters to exist
Chalk dust between 10~20 microns, because its particle diameter is small, lightweight, will stay aloft the long period, is difficult to fall, and
Easily by human body suction body, it is attached on mucous membrane small airway and alveolar, is detrimental to health.In order to reduce small particle chalk dust
The harm of dirt, dust-free chalk adds grease type or polyalcohols material as binding agent on the basis of calcium carbonate and calcium sulfate, then
The larger filler of proportion, such as clay, marl, cement are added, so as to increase the proportion and volume of chalk dust, and then is reduced
The degree of dispersing of small particle chalk dust.
But in actual applications, teacher write or wipe writing on the blackboard when, dust-free chalk due to unbalance stress or itself
The unequal factor of structure, inevitably still produces small particle chalk dust.Therefore, dust-free chalk pollutes to chalk dust
Reducing effect is not fairly obvious, when writing or wiping writing on the blackboard, still there is more small particle chalk dust and flies away in the air,
The body of teacher and student are caused harm.
Utility model content
The purpose of this utility model is that overcoming the deficiencies in the prior art, there is provided a kind of dust-absorbing blackboard.
In order to solve the above technical problems, the technical solution of the utility model is：
The utility model provides a kind of dust-absorbing blackboard, the dust-absorbing blackboard include blackboard body, breather line, induced-draught fan and
Dust purification system, wherein,
The breather line is fixed on the blackboard body surrounding, the breather line also include outlet pipe, with it is described
Outlet pipe is connected but the aspirating air pipe being not communicated with and the snorkel communicated with the outlet pipe and the aspirating air pipe
The passage towards the blackboard body, the outlet pipe are uniformly provided with road, the outlet pipe and the aspirating air pipe
The top edge of the blackboard body is fixed on, the aspirating air pipe includes being fixed on the side air-breathing of the blackboard body lateral edges
Pipeline and it is fixed on the blackboard body feather edge and the base aspirating air pipe communicated with the side aspirating air pipe；
The induced-draught fan is connected with the base aspirating air pipe, for chalk dust to be sucked into aspirating air pipe；
The input of the dust purification system is connected with the base aspirating air pipe, the output of the dust purification system
End is connected with the air duct, the gas for carrying chalk dust for purifying the base aspirating air pipe input, and will
Purified gas inputs air duct.
It is preferred that, the dust-absorbing blackboard also includes the catch for being used to change passage ventilation direction, and the catch is fixed on
The ventilation bore edges, and the catch being arranged on the side aspirating air pipe 221 and gas stream in the side aspirating air pipe
The angle in dynamic direction is 120-150 °, is arranged at catch on the outlet pipe towards the air-breathing side of the side aspirating air pipe
To.
It is preferred that, the dust purification system includes screen layer, and the screen layer includes 1-3 screen cloth of genesis analysis,
The size of the screen cloth mesh is 10-100mm, and the screen cloth mesh size positioned at upper strata is more than the screen cloth mesh chi positioned at lower floor
It is very little.
It is preferred that, the dust purification system also includes being arranged at the absorption liquid layer below the screen layer, the absorption
Contain the reaction solution for decomposing calcium carbonate and calcium sulfate in liquid layer.
It is preferred that, the reaction solution is the mixed solution of hydrochloric acid and ammonium chloride solution, pH=1.5-3 of the mixed solution.
It is preferred that, the base aspirating air pipe is obliquely installed, and the induced-draught fan and position on the base aspirating air pipe
One end on the lower is connected.
It is preferred that, the junction of the side aspirating air pipe and the base aspirating air pipe is arc.
The technical scheme that the utility model embodiment is provided can include following beneficial effect：
The utility model provides a kind of dust-absorbing blackboard, the dust-absorbing blackboard include blackboard body, breather line, induced-draught fan and
Dust purification system, wherein, the breather line is fixed on the blackboard body surrounding, and the breather line also includes escape pipe
Road, the aspirating air pipe for being connected but being not communicated with the outlet pipe and communicated with the outlet pipe and the aspirating air pipe
Air duct, the passage towards the blackboard body is uniformly provided with the outlet pipe and the aspirating air pipe, it is described
Outlet pipe is fixed on the top edge of the blackboard body, and the aspirating air pipe includes being fixed on the blackboard body lateral edges
Side aspirating air pipe and it is fixed on the blackboard body feather edge and the base aspirating air pipe communicated with the side aspirating air pipe；
The induced-draught fan is connected with the base aspirating air pipe, for chalk dust to be sucked into aspirating air pipe；The dust purification system
The input of system is connected with the base aspirating air pipe, and the output end of the dust purification system is connected with the air duct,
For purifying the gas for carrying chalk dust of the base aspirating air pipe input, and purified gas is inputted into snorkel
Road.The utility model provides a kind of dust-absorbing blackboard, and the dust-absorbing blackboard includes blackboard body, breather line, induced-draught fan and dust
Cleaning system.This dust-absorbing blackboard by induced-draught fan will be erasable during the chalk dust that produces quickly suction is arranged at blackboard body
In the aspirating air pipe of lateral edges and feather edge, carry out purification subsequently into the dust purification system being connected with aspirating air pipe and remove
Dirt, the calcium carbonate in chalk dust and calcium sulfate are removed, will be net finally by the air duct being connected with dust purification system
Gas after change, which is input to, to be arranged in the outlet pipe of blackboard body top edge, is discharged gas by outlet pipe, is formed
Airflow circulating.The active force that outlet pipe exhaust is produced cooperates with the active force that induced-draught fan is produced, and collectively promotes in air
Chalk dust rapidly enter in dust purification system purify so that effectively reduction air in chalk dust content, and then drop
The low harm to human body.
Brief description of the drawings
, below will be to embodiment for clearer explanation the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it is clear that, to those skilled in the art,
On the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation for the first dust-absorbing blackboard that the utility model embodiment is provided；
Fig. 2 is the structural representation for second of dust-absorbing blackboard that the utility model embodiment is provided；
Fig. 3 is the structural representation for the third dust-absorbing blackboard that the utility model embodiment is provided；
Fig. 4 is the structural representation for the dust purification system that the utility model embodiment is provided；
In figure：
1- blackboard bodies, 2- breather lines, 3- induced-draught fans, 4- dust purification systems, 5- passages, 6- catch, 21- outlets
Pipeline, 22- aspirating air pipes, 23- air ducts, 221- sides aspirating air pipe, 222- bases aspirating air pipe, 41- screen layers, 42-
Absorb liquid layer.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the utility model, below in conjunction with this reality
With the accompanying drawing in new embodiment, the technical scheme in the utility model embodiment is purged, is fully described by, it is clear that
Described embodiment is only a part of embodiment of the utility model, rather than whole embodiments.Based on the utility model
In embodiment, the every other embodiment that those skilled in the art are obtained under the premise of creative work is not made, all
Protection domain of the present utility model should be belonged to.
Fig. 1 is refer to, the structural representation of the first dust-absorbing blackboard of the utility model embodiment offer is provided.
As shown in Figure 1, the utility model embodiment provides a kind of dust-absorbing blackboard, the dust-absorbing blackboard include blackboard body 1,
Breather line 2, induced-draught fan 3 and dust purification system 4, wherein, the breather line 2 is fixed on the surrounding of blackboard body 1, institute
State breather line 2 also include outlet pipe 21, the aspirating air pipe 22 that is connected but is not communicated with the outlet pipe 21 and with institute
State the air duct 23 that outlet pipe 21 and the aspirating air pipe 22 are communicated, the outlet pipe 21 and the aspirating air pipe 22
On be uniformly provided with passage 5 towards the blackboard body 1, the outlet pipe 21 is fixed on the top of the blackboard body 1
Edge, the aspirating air pipe 22 includes being fixed on the side aspirating air pipe 221 of the lateral edges of blackboard body 1 and is fixed on described black
The feather edge of plate body 1 and the base aspirating air pipe 222 communicated with the side aspirating air pipe 221；The induced-draught fan 3 and the bottom
Side aspirating air pipe 222 is connected, for chalk dust to be sucked into aspirating air pipe 22；The input of the dust purification system 4 with
The base aspirating air pipe 222 is connected, and the output end of the dust purification system 4 is connected with the air duct 23, for net
Change the gas for carrying chalk dust that the base aspirating air pipe 222 is inputted, and purified gas is inputted into air duct
23。
In the present embodiment, blackboard body 1 is the normal blackboard of teaching, and writing on the blackboard etc. can be write in blackboard body 1.
The breather line 2 is fixed on the surrounding of blackboard body 1, and the breather line 2 can be metallic conduit or plastic conduit,
Connected mode with blackboard body 1 can be welding, can also be fixedly connected with the two by connector.
Passage 5 is uniformly arranged on outlet pipe 21 and aspirating air pipe 22, and towards the blackboard body 1, it is ensured that go out
Feed channel 21 discharge gas can act on the chalk dust in blackboard body 1, and aspirating air pipe 22 can induced-draught fan 3 with
And the gas that outlet pipe 21 is discharged acts on the chalk dust produced in lower suction blackboard body 1.Between two neighboring passage 5
Interval can be 3-10mm, in the present embodiment between two neighboring passage 5 at intervals of 5mm.The aperture of passage 5 can be with
For 0.8-1.5mm, the aperture of passage 5 is 0.8mm in the present embodiment.In the utility model other embodiment, outlet pipe 21
Interval between upper two neighboring passage 5 can be smaller compared with the interval between two neighboring passage 5 on aspirating air pipe 22,
Or, the aperture of the upper vent hole 5 of outlet pipe 21 can be larger compared with the aperture of the upper vent hole 5 of aspirating air pipe 22, is easy to outlet
Gas in pipeline 21 is discharged in time, it is to avoid wash out outlet pipe 21 because gas pressure is excessive.
Arrow represents the gas flow containing chalk dust in Fig. 1.The workflow of the present embodiment is：Open and inhaled with base
The induced-draught fan 3 that feed channel 222 is connected, by the use of induced-draught fan 3 as power source, the air in aspirating air pipe 22 is detached so that
Negative pressure is produced in aspirating air pipe 22.Because aspirating air pipe 22 is uniformly provided with passage 5, now, the chalk dust of erasable generation is
Enter along passage 5 inside aspirating air pipe 22, wherein, can be with approaching side apart from the nearlyer chalk dust of the lateral edges of blackboard body 1
Side aspirating air pipe 221, the chalk dust nearer apart from the feather edge of blackboard body 1 can enter base aspirating air pipe 222.Due to side
Side aspirating air pipe 221 collectively forms aspirating air pipe 22 with base aspirating air pipe 222, and the two is communicated, therefore, is inhaled into side
The chalk dust of feed channel 221 also in the presence of induced-draught fan 3, eventually enters into base aspirating air pipe 222, and it is net to be admitted to dust
Change system 4 is purified, so that the calcium carbonate in chalk dust and calcium sulfate be removed.Pass through air duct by purified gas
23 enter the outlet pipe 21 for being arranged at the top edge of blackboard body 1, discharge gas eventually through outlet pipe 21, form air-flow
Circulation.Outlet pipe 21 cooperates with induced-draught fan 3, collectively promotes the chalk dust in air and rapidly enters dust purification system
Purified in 4, so as to effectively reduce the content of chalk dust in air, and then reduce the harm to human body.
Fig. 2 is refer to, the structural representation of second of dust-absorbing blackboard of the utility model embodiment offer is provided.
As shown in Figure 2, the dust-absorbing blackboard also includes the catch 6 for being used to change the ventilation of passage 5 direction, the catch 6
The edge of passage 5 is fixed on, and is arranged at the catch 6 on side aspirating air pipe 221 and the side aspirating air pipe
The angle of gas flow direction is 120-150 ° in 221, is arranged at the catch 6 on the outlet pipe 21 towards the side
The inspiratory direction of side aspirating air pipe 221.
Arrow represents the gas flow containing chalk dust in Fig. 2.The present embodiment at the edge of passage 5 by setting catch
6 change the ventilation direction of passage 5.The flow direction of gas is side air intake duct straight down in side aspirating air pipe 221
The catch 6 and the angle of gas flow direction in the side aspirating air pipe 221 on road 221 can be 120-150 °, this
In embodiment, the catch 6 and the angle of gas flow direction in side aspirating air pipe 221 on side aspirating air pipe 221 are
135°.In order to effectively change inspiratory direction and ensure that gas smoothly enters catch 6 in side aspirating air pipe 221, the present embodiment and needed
What is tilted upward is fixed on the lower edge of passage 5.
Floated in the utility model skyborne chalk dust by by outlet pipe 21 apply thrust and
The suction applied at aspirating air pipe 22, chalk dust will be moved along the resultant direction with lifting force and suction（Due to powder
Dust own wt is very small, can be neglected herein）, eventually enter into aspirating air pipe 22.And it is most of close to outlet pipe
21 end positions and close to side aspirating air pipe 221 chalk dust due to the suction at the side aspirating air pipe 221 that is subject to
Than the suction at base aspirating air pipe 222 greatly, eventually fall into side aspirating air pipe 221.In the present embodiment, outlet pipe 21
End position sets the purpose of catch 6 to be the outgassing direction for changing outlet pipe 21, with the catch on side aspirating air pipe 221
6 cooperate, to be present in the chalk dust of the end position of outlet pipe 21 with towards the inspiratory direction of side aspirating air pipe 221
Active force, so as to change the Impact direction of the chalk dust of the end position of outlet pipe 21, shortens chalk dust and is inhaled into side
The track of feed channel 221, and then the time that chalk dust is floated in the air is reduced, reduce the harm to human body.
In the present embodiment, the catch 6 on outlet pipe 21 is arranged at position of the outlet pipe 21 close to end, and catch 6
Fixed-direction towards side aspirating air pipe 221 inspiratory direction, and positioned at the middle part of outlet pipe 21 passage 5 on simultaneously
It is not provided with catch 6.The purpose that the passage 5 of the middle part of outlet pipe 21 is not provided with catch 6 is in blackboard sheet
The chalk dust at the middle part of body 1 is with active force straight down, and increase chalk dust enters the motion speed of base aspirating air pipe 222
Degree.
Fig. 3 is refer to, the structural representation of the third dust-absorbing blackboard of the utility model embodiment offer is provided.
From the figure 3, it may be seen that the base aspirating air pipe 222 is obliquely installed, and the induced-draught fan 3 and the base aspirating air pipe
222 it is upper rest against under one end be connected.In the present embodiment, the purpose that induced-draught fan 3 is connected with the end of base aspirating air pipe 222 is
Shorten the horizontal length of air duct 23, the floor space of air duct 23 is reduced while saving manufacturing cost, by more skies
Between leave teachers' instruction for.Air duct 23 is connected to the end of outlet pipe 21, i.e. air duct 23 accordingly in the present embodiment
Link position of the link position with induced-draught fan 3 on base aspirating air pipe 222 on outlet pipe 21 is corresponding, further contracting
The horizontal length of short air duct 23.
If induced-draught fan 3 is connected to an end of base aspirating air pipe 222, the side aspirating air pipe being connected with this end
Chalk dust in 221 is easier under the suction of induced-draught fan 3 to enter dust purification system 4, and with base aspirating air pipe
Chalk dust in the connected side aspirating air pipe 221 in 222 another end then will be by almost whole base aspirating air pipe
222 length can just enter dust purification system 4, and therefore, base aspirating air pipe 222 is obliquely installed by the present embodiment, chalk
Dust can be slipped in dust purification system 4 along inclined base aspirating air pipe 222 in the presence of induced-draught fan 3, effectively
Reduce its resistance of motion.
Further, the junction of the side aspirating air pipe 221 and the base aspirating air pipe 222 is arc.Inhale side
Feed channel 221 is vertical pipeline, and base aspirating air pipe 222 is horizontal pipe or to be slightly tilted on the basis of horizontal line, the two it
Between angle be about 90 °, the chalk dust inside side aspirating air pipe 221 is in side aspirating air pipe 221 and base air-breathing
During the junction of pipeline 222, it is easy to form dead angle, stop that chalk dust enters dust purification system 4.Side in the present embodiment
The junction of aspirating air pipe 221 and the base aspirating air pipe 222 is designed as arc, and smooth curved design can avoid dead angle
Obstruction so that the chalk dust in side aspirating air pipe 221 is slipped to bottom in the presence of induced-draught fan 3 along arc junction
Side aspirating air pipe 222, eventually enters into dust purification system 4 and purifies, effectively reduce its resistance of motion.
The utility model dust purification system 4 includes screen layer 41, and the screen layer 41 includes 1-3 sieve of genesis analysis
Net, the size of the screen cloth mesh is 20-100mm, and the screen cloth mesh size positioned at upper strata is more than the screen cloth net positioned at lower floor
Hole size.
Into in the gas of dust purification system 4 comprising the chalk dust in the range of certain particle size interval, wherein minority is
The lighter big particle of harm to the human body（Particle diameter is more than 100 microns）, majority is that the serious particle diameter of harm to the human body is smaller
Particle.It is difficult that the chalk dust of various particle diameters is complete just with 1-2 screen cloth therefore because particle diameter is distributed more widely
It is complete cleared.
Fig. 4 is refer to, the structural representation of the dust purification system of the utility model embodiment offer is provided.This implementation
In example, the dust purification system 4 includes screen layer 41, and the screen layer 41 includes 3 screen clothes of genesis analysis, from top to bottom
The screen cloth mesh of distribution is followed successively by 100mm, 60mm and 10mm, and particle diameter is removed successively and is more than 100mm, particle diameter more than 60mm and particle diameter
Chalk dust more than 10mm.Arrow represents the gas flow containing chalk dust in figure.When the gas containing chalk dust enters
Enter after dust purification system 4, first pass around the first screen cloth that mesh size is 100mm, the chalk dust that particle diameter is less than 100mm can
To pass through the first screen cloth, into the second screen cloth, and the chalk dust that particle diameter is more than 100mm will be stopped by the first screen cloth, stay in the
On the grid of one screen cloth.Similarly, two screen clothes below the first screen cloth can stop 60mm and 10mm chalk dusts successively, in proper order
Progressive is blocked in chalk dust on grid, to reach the purpose of purification chalk dust.
Further, the dust purification system 4 also includes the absorption liquid layer 42 for being arranged at the lower section of screen layer 41, described to absorb
Contain the solution for decomposing calcium carbonate and calcium sulfate in liquid layer 42.By screening out for 3 layers of screen cloth being set in above-mentioned screen layer 41, enter
The chalk dust that particle diameter is more than 10mm is substantially free of in the gas for entering air duct 23.But, particle diameter is less than 10mm chalk
Dust is discharged after entering outlet pipe 21 through air duct 23, and another is recycled in air, even if content is less, but threatens
Health.On the other hand, screen layer 41 can not completely, thoroughly screen out the chalk dust of corresponding size, that is to say, that
Even across screening out for 3 layers of screen cloth, particle diameter be more than 10mm chalk dust also still inevitably have it is a small amount of enter supply gas
Pipeline 23.Therefore, the present embodiment sets absorption liquid layer 42 below screen layer 41, absorbs liquid layer 42 containing decomposition calcium carbonate and sulphur
The reaction solution of sour calcium.The particle diameter that the chalk dust for absorbing liquid layer 42 is entered by screen layer 41 is smaller, and content is relatively low, because
This, can be fallen after the reaction solution in touching absorption liquid layer 42 by fast decoupled, so that chalk dust is more thoroughly removed,
The gas purified through absorbing liquid layer 42 is substantially free of chalk dust.
The reaction solution absorbed in liquid layer 42 can be decomposition calcium carbonate and the mixed solution of calcium sulfate.Through after a while
Purification after should change reaction solution in time, it is to avoid reaction solution concentration is too low and influences clean-up effect.Meanwhile, in order to promote reaction solution
With the reaction speed of calcium carbonate, calcium sulfate, absorbing heater can be installed below liquid layer 42, promote reaction solution and carbonic acid
Calcium, the positive progress of calcium sulfate reaction.
In the present embodiment, the reaction solution is the mixed solution of hydrochloric acid and ammonium chloride solution, the pH of the mixed solution=
1.5-3.Solution mixed above can effectively decompose calcium carbonate and calcium sulfate in chalk dust, so as to reduce chalk dust to people
The harm of body.In the utility model other embodiment, reaction solution can also include disodium ethylene diamine tetra-acetic acid aqueous solution, pass through
The complexing of disodium ethylene diamine tetraacetate promotes dissolving of the calcium sulfate in water.
Described above is only embodiment of the present utility model, it is noted that come for those skilled in the art
Say, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection domain of the present utility model.
Claims (7)
1. a kind of dust-absorbing blackboard, it is characterised in that the dust-absorbing blackboard includes blackboard body（1）, breather line（2）, induced-draught fan
（3）With dust purification system（4）, wherein,
The breather line（2）It is fixed on the blackboard body（1）Surrounding, the breather line（2）Also include outlet pipe
（21）And the outlet pipe（21）The aspirating air pipe for being connected but being not communicated with（22）And with the outlet pipe（21）With it is described
Aspirating air pipe（22）The air duct communicated（23）, the outlet pipe（21）With the aspirating air pipe（22）On be uniformly provided with
Towards the blackboard body（1）Passage（5）, the outlet pipe（21）It is fixed on the blackboard body（1）Top edge,
The aspirating air pipe（22）Including being fixed on the blackboard body（1）The side aspirating air pipe of lateral edges（221）Be fixed on institute
State blackboard body（1）Feather edge and with the side aspirating air pipe（221）The base aspirating air pipe communicated（222）；
The induced-draught fan（3）With the base aspirating air pipe（222）It is connected, for chalk dust to be sucked into aspirating air pipe
（22）；
The dust purification system（4）Input and the base aspirating air pipe（222）It is connected, the dust purification system
（4）Output end and the air duct（23）It is connected, for purifying the base aspirating air pipe（222）What is inputted carries powder
The gas of dust, and purified gas is inputted into air duct（23）.
2. the dust-absorbing blackboard according to claim 1, it is characterised in that the dust-absorbing blackboard also includes being used to change ventilation
Hole（5）The catch in ventilation direction（6）, the catch（6）It is fixed on the passage（5）Edge, and it is arranged at the side suction
Catch in feed channel 221（6）With the side aspirating air pipe（221）The angle of interior gas flow direction is 120-150 °, if
It is placed in the outlet pipe（21）On catch（6）Towards the side aspirating air pipe（221）Inspiratory direction.
3. the dust-absorbing blackboard according to claim 1, it is characterised in that the dust purification system（4）Including screen layer
（41）, the screen layer（41）The 1-3 screen cloth including genesis analysis, the size of the screen cloth mesh is 10-100mm, and position
Screen cloth mesh size in upper strata is more than the screen cloth mesh size positioned at lower floor.
4. the dust-absorbing blackboard according to claim 3, it is characterised in that the dust purification system（4）Also include being arranged at
The screen layer（41）The absorption liquid layer of lower section（42）, the absorption liquid layer（42）In containing decomposing the anti-of calcium carbonate and calcium sulfate
Answer liquid.
5. dust-absorbing blackboard according to claim 4, it is characterised in that the reaction solution is the mixed of hydrochloric acid and ammonium chloride solution
Close solution, pH=1.5-3 of the mixed solution.
6. dust-absorbing blackboard according to claim 5, it is characterised in that the base aspirating air pipe（222）It is obliquely installed, and
The induced-draught fan（3）With the base aspirating air pipe（222）It is upper rest against under one end be connected.
7. the dust-absorbing blackboard according to claim 1-6 any one, it is characterised in that the side aspirating air pipe（221）
With the base aspirating air pipe（222）Junction be arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621202223.7U CN206485112U (en) | 2016-11-08 | 2016-11-08 | A kind of dust-absorbing blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621202223.7U CN206485112U (en) | 2016-11-08 | 2016-11-08 | A kind of dust-absorbing blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206485112U true CN206485112U (en) | 2017-09-12 |
Family
ID=59768659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621202223.7U Expired - Fee Related CN206485112U (en) | 2016-11-08 | 2016-11-08 | A kind of dust-absorbing blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206485112U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108790495A (en) * | 2018-05-11 | 2018-11-13 | 李少琴 | A kind of education portable blackboard device |
| CN112009147A (en) * | 2020-09-02 | 2020-12-01 | 仙居颜飘机械科技有限公司 | Classroom blackboard dust collecting system |
-
2016
- 2016-11-08 CN CN201621202223.7U patent/CN206485112U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108790495A (en) * | 2018-05-11 | 2018-11-13 | 李少琴 | A kind of education portable blackboard device |
| CN112009147A (en) * | 2020-09-02 | 2020-12-01 | 仙居颜飘机械科技有限公司 | Classroom blackboard dust collecting system |
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