CN204657073U - Suction-type chalk dust collecting device - Google Patents
Suction-type chalk dust collecting device Download PDFInfo
- Publication number
- CN204657073U CN204657073U CN201520172603.XU CN201520172603U CN204657073U CN 204657073 U CN204657073 U CN 204657073U CN 201520172603 U CN201520172603 U CN 201520172603U CN 204657073 U CN204657073 U CN 204657073U
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- Prior art keywords
- valve
- bleeding
- air
- screen pack
- opening
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- Expired - Fee Related
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Abstract
The utility model relates to a kind of suction-type chalk dust collecting device, belong to teaching equipment field, comprise the blowing device being arranged on blackboard bottom and the extractor fan being arranged on blackboard top, blowing device comprises hair-dryer, hair-dryer air outlet is connected with air blowing valve, air blowing valve is tubular, one side shaft is to establishing opening, the tube wall of opening part is outwards routed up radially, extractor fan comprises semicylindrical screen pack, valve of bleeding is established in screen pack, bleeding, valve side is axial establishes opening, the tube wall of opening part is outwards routed up radially, arc pallet is established in valve bottom of bleeding, valve of bleeding connects air exhauster, air exhauster connects collecting bag, chalk ash collection is made by producing air flow, human body is avoided to suck, and collecting effect is good.
Description
Technical field
The utility model relates to a kind of suction-type chalk dust collecting device, belongs to teaching equipment field.
Background technology
Chalk teaching aid is the indispensable instrument of teaching at present, impart knowledge is carried out with it, it is one of the most original and the most traditional teaching method, chalk applies from it history that it has several thousand now, indelible contribution has been made to the educational undertaking of the mankind, along with the progress of history and the development of society, chalk, while making tremendous contribution for mankind's educational undertaking, also brings huge harm to the teacher and student that are engaged in educational undertaking.
Teacher needs with chalk Writing-painting on blackboard, the course of a dozens of minutes may need repeatedly several times erasable, dust is to the harm of teacher's health, the most common with lung, in teaching process, chalk dust is easy to be inhaled into lung, majority is delayed in alveolar, through a series of stimulation, the effect of chemistry and immunity just can cause lung to lose, comprise inflammation in respiratory system and pulmonary ventilation function decline, common PUD D has: chronic, acute pneumonia, lung cancer, pneumoconiosis etc. (namely contain silica in chalk dust, be inhaled into lung, the dioxide-containing silica dissociated in lung forms the dust of pulmonary fibrosis more than one of percentage, thus make alveolar fibrosis, lung's respiratory function is caused to decline.
Utility model content
According to above deficiency of the prior art, the technical problems to be solved in the utility model is: providing a kind of by producing the suction-type chalk dust collecting device that air flow makes chalk ash collection get up, avoid human body to suck, and collecting effect is good.
Suction-type chalk dust collecting device described in the utility model, comprise the blowing device being arranged on blackboard bottom and the extractor fan being arranged on blackboard top, blowing device comprises hair-dryer, hair-dryer air outlet is connected with air blowing valve, air blowing valve is tubular, one side shaft is to establishing opening, the tube wall of opening part is outwards routed up radially, extractor fan comprises semicylindrical screen pack, valve of bleeding is established in screen pack, bleeding, valve side is axial establishes opening, the tube wall of opening part is outwards routed up radially, arc pallet is established in valve bottom of bleeding, valve of bleeding connects air exhauster, air exhauster connects collecting bag.
Operation principle and process:
When writing on blackboard with chalk or erase the board, the chalk dust that chalk drops or by wipe fall chalk dust by blow valve blowout air-flow blow near the extractor fan of top, chalk dust after screen pack through valve suction collecting bag of bleeding, supporting plate can prevent chalk dust from again being overflowed by screen pack due to eddy flow, ensure collecting effect, oarse-grainedly cannot enter screen pack as paper scrap etc., prevent from resulting in blockage to valve of bleeding.
The beneficial effect that the utility model is compared with prior art had is:
Suction-type chalk dust collecting device described in the utility model, produces air flow and make chalk ash collection, avoid human body to suck, and the good structure of collecting effect is simple by blowning installation and air extractor, practical.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment schematic diagram.
In figure: 1, screen pack; 2, to bleed valve; 3, supporting plate; 4, blackboard; 5, air blowing valve; 6, air exhauster; 7, hair-dryer; 8, collecting bag.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
As shown in Figure 1, suction-type chalk dust collecting device described in the utility model, comprise the blowing device being arranged on blackboard bottom and the extractor fan being arranged on blackboard top, blowing device comprises hair-dryer 7, hair-dryer 7 air outlet is connected with air blowing valve 5, air blowing valve 5 is tubular, one side shaft is to establishing opening, the tube wall of opening part is outwards routed up radially, extractor fan comprises semicylindrical screen pack 1, valve 2 of bleeding is established in screen pack 1, bleeding, valve 2 side is axial establishes opening, the tube wall of opening part is outwards routed up radially, arc pallet 3 is established in valve 2 bottom of bleeding, valve 2 of bleeding connects air exhauster 6, air exhauster 6 connects collecting bag 8.
Operation principle and process:
When writing on blackboard with chalk or erase the board, the chalk dust that chalk drops or by wipe fall chalk dust blown near the extractor fan of top by the air-flow that valve 5 of blowing blows out, chalk dust after screen pack 1 through valve 2 suction collecting bag 8 of bleeding, supporting plate 3 can prevent chalk dust from again being overflowed by screen pack 1 due to eddy flow, ensure collecting effect, oarse-grainedly cannot enter screen pack 1 as paper scrap etc., prevent from resulting in blockage to valve 2 of bleeding.
Claims (1)
1. a suction-type chalk dust collecting device, it is characterized in that: comprise the blowing device being arranged on blackboard bottom and the extractor fan being arranged on blackboard top, blowing device comprises hair-dryer (7), hair-dryer (7) air outlet is connected with air blowing valve (5), air blowing valve (5) is for tubular, one side shaft is to establishing opening, the tube wall of opening part is outwards routed up radially, extractor fan comprises semicylindrical screen pack (1), valve of bleeding (2) is established in screen pack (1), bleeding, valve (2) side is axial establishes opening, the tube wall of opening part is outwards routed up radially, arc pallet (3) is established in valve (2) bottom of bleeding, valve (2) of bleeding connects air exhauster (6), air exhauster (6) connects collecting bag (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520172603.XU CN204657073U (en) | 2015-03-25 | 2015-03-25 | Suction-type chalk dust collecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520172603.XU CN204657073U (en) | 2015-03-25 | 2015-03-25 | Suction-type chalk dust collecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204657073U true CN204657073U (en) | 2015-09-23 |
Family
ID=54127510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520172603.XU Expired - Fee Related CN204657073U (en) | 2015-03-25 | 2015-03-25 | Suction-type chalk dust collecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204657073U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108442482A (en) * | 2018-03-22 | 2018-08-24 | 湖南匡为科技有限公司 | A kind of toilet bowl deodorization device |
-
2015
- 2015-03-25 CN CN201520172603.XU patent/CN204657073U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108442482A (en) * | 2018-03-22 | 2018-08-24 | 湖南匡为科技有限公司 | A kind of toilet bowl deodorization device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20160325 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |