CN201133701Y - Air exhausting apparatus for chemical education equipment - Google Patents
Air exhausting apparatus for chemical education equipment Download PDFInfo
- Publication number
- CN201133701Y CN201133701Y CNU2007200819174U CN200720081917U CN201133701Y CN 201133701 Y CN201133701 Y CN 201133701Y CN U2007200819174 U CNU2007200819174 U CN U2007200819174U CN 200720081917 U CN200720081917 U CN 200720081917U CN 201133701 Y CN201133701 Y CN 201133701Y
- Authority
- CN
- China
- Prior art keywords
- air draft
- main pipeline
- ventilating opening
- exhaust
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229920000742 Cotton Polymers 0.000 claims abstract description 5
- 230000003584 silencer Effects 0.000 claims description 7
- 230000008030 elimination Effects 0.000 claims description 3
- 238000003379 elimination reaction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Images
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- Exhaust Silencers (AREA)
- Ventilation (AREA)
- Duct Arrangements (AREA)
Abstract
The utility model discloses an exhaust device of a chemical teaching device which includes an underground exhaust main pipeline and a ventilating opening which is arranged on the exhaust main pipeline and can be communicated with an exhaust branch pipeline on an experiment table; the transverse section of the exhaust main pipeline is square; the caliber of the exhaust main pipeline is changed from big to small from the front to the back; one side at the lower end of the ventilating opening communicated with the exhaust branch pipeline is a dipped finish; the lower side of the exhaust main pipeline corresponding to the ventilating opening is provided with a muffler; the muffler comprises a seal outer tube and a porous inner tube arranged in the seal outer tube as well as an anechoic cotton arranged between the seal outer tube and the porous inner tube; as the caliber of the exhaust main pipeline is changed from big to small from the front to the back and the section is square, the utility model can effectively ensure the front and back air speeds on an opening of an air hood on the experiment table to be uniform and can reduce the resistance; besides, the utility model is convenient for ground paving and to be connected with an air inlet and an air outlet of a blower. Simultaneously the muffler is additionally arranged to greatly reduce noises.
Description
Technical field
The utility model relates to a kind of air exhausting device, particularly a kind of laboratory chemistry teaching equipment air exhausting device that is applicable to.
Background technology
Its underground air draft trunk line of air exhausting device that is used for laboratory chemistry teaching equipment is at present mostly used the PVC pipe, and caliber size in front and back is consistent, causes back space to strengthen, and resistance strengthens, and causes that fan housing cover mouth front and back wind speed is inhomogeneous on the experimental bench; Underground air draft trunk line is connected with the air draft branch pipe(tube) is vertical, and no angle increases flowing resistance, produces noise; There is not silencing apparatus in the import department that is responsible in air draft, the influence of noise education experiment that underground air draft trunk line produces; The advancing of blower fan, exhaust outlet are square opening and are connected with pipe, can strengthen the friction of air and air during the air intake air draft, strengthen noise, resistance.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that above-mentioned technology exists, and discloses a kind of simple in structure, wind speed is even, noise is low, easy for installation chemistry teaching equipment air exhausting device.
For reaching the foregoing invention purpose, the technical scheme that is adopted is: a kind of chemistry teaching equipment air exhausting device, it comprises underground air draft trunk line and is located at the ventilating opening that can be communicated with air draft branch pipe(tube) on the experimental bench on this air draft trunk line, the cross section of air draft trunk line is square, the bore of this pipe from large to small from front to back, ventilating opening lower end one side that is communicated with the air draft branch pipe(tube) is angle, at the air draft trunk line downside that should ventilating opening is provided with silencer.
Described silencer comprise a sealed outer pipe and one place the porous inner tube in the sealing outer tube and place sealed outer pipe and porous inner tube between the noise elimination cotton.
The utility model since the bore of air draft trunk line from large to small from front to back, and section is square, and can guarantee effectively on the experimental bench that wind speed is even before and after the fan housing cover mouth, reduces resistance, and is convenient to ground and lays and link to each other with the advancing of blower fan, exhaust outlet.Set up silencer simultaneously, noise is reduced greatly.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is Fig. 1 vertical view;
Fig. 3 is an A-A cutaway view among Fig. 1;
Fig. 4 is a B-B cutaway view among Fig. 1;
Fig. 5 is the ventilating opening structure schematic diagram.
Among the figure: 1-air draft trunk line, 2-ventilating opening, 3-silencer, 3.1-sealed outer pipe, 3.2-porous inner tube, 3.3-eliminate the noise cotton.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail:
Shown in Fig. 1～5, a kind of chemistry teaching equipment air exhausting device, it comprises underground air draft trunk line 1 and is located at the ventilating opening 2 that can be communicated with air draft branch pipe(tube) on the experimental bench on this air draft trunk line 1, the cross section of air draft trunk line 1 is square (as shown in Figure 3), the bore of this pipe is (as shown in Figure 1) from large to small from front to back, ventilating opening 2 lower ends one side that is communicated with the air draft branch pipe(tube) is angle (as shown in Figure 5), and downside that should ventilating opening 21 pair of air draft trunk line is provided with silencer 3.
As shown in Figure 4, described silencer 3 comprise a sealed outer pipe 3.1 and one place the porous inner tube 3.2 in the sealing outer tube and place sealed outer pipe 3.1 and porous inner tube 3.2 between noise elimination cotton 3.3.
Claims (2)
1. chemistry teaching equipment air exhausting device, it comprises underground air draft trunk line (1) and is located at the ventilating opening (2) that can be communicated with air draft branch pipe(tube) on the experimental bench on this air draft trunk line (1), it is characterized in that: the cross section of air draft trunk line (1) is square, the bore of this pipe from large to small from front to back, ventilating opening (2) lower end one side that is communicated with the air draft branch pipe(tube) is angle, at air draft trunk line (1) downside that should ventilating opening (2) is provided with silencer (3).
2. a kind of chemistry teaching equipment air exhausting device according to claim 1 is characterized in that: described silencer (3) comprise a sealed outer pipe (3.1) and one place the porous inner tube (3.2) in the sealing outer tube and place sealed outer pipe (3.1) and porous inner tube (3.2) between noise elimination cotton (3.3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200819174U CN201133701Y (en) | 2007-11-14 | 2007-11-14 | Air exhausting apparatus for chemical education equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200819174U CN201133701Y (en) | 2007-11-14 | 2007-11-14 | Air exhausting apparatus for chemical education equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201133701Y true CN201133701Y (en) | 2008-10-15 |
Family
ID=40061971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200819174U Expired - Fee Related CN201133701Y (en) | 2007-11-14 | 2007-11-14 | Air exhausting apparatus for chemical education equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201133701Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010108403A1 (en) * | 2009-03-23 | 2010-09-30 | Wu Xiping | Long air pipe for distributing supplying air and returning air ratedly and uniformly |
-
2007
- 2007-11-14 CN CNU2007200819174U patent/CN201133701Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010108403A1 (en) * | 2009-03-23 | 2010-09-30 | Wu Xiping | Long air pipe for distributing supplying air and returning air ratedly and uniformly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081015 Termination date: 20091214 |