CN220738944U - Negative pressure cover - Google Patents
Negative pressure cover Download PDFInfo
- Publication number
- CN220738944U CN220738944U CN202322248291.3U CN202322248291U CN220738944U CN 220738944 U CN220738944 U CN 220738944U CN 202322248291 U CN202322248291 U CN 202322248291U CN 220738944 U CN220738944 U CN 220738944U
- Authority
- CN
- China
- Prior art keywords
- inner cover
- negative pressure
- cover
- positioning ring
- activated carbon
- 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.)
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Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 239000008187 granular material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model relates to a negative pressure cover, which comprises an outer cover and an inner cover, wherein a first positioning ring and a second positioning ring are fixedly arranged in the outer cover, the inner cover is detachably arranged in the first positioning ring, the top wall of the inner cover extends upwards and is abutted against the bottom wall of the second positioning ring, activated carbon particles are filled in a filtering cavity, activated carbon nets are alternately arranged in the inner cover, a plurality of diversion holes are formed in two sides of the inner cover, the diversion holes on the same side are respectively positioned on two adjacent activated carbon nets on the same side, exhaust holes are symmetrically formed in the second positioning ring, and the top end of the negative pressure cover is connected with an exhaust pipe of a negative pressure fan so as to pump harmful gas in a laboratory into the inner cover, the harmful gas can flow in the inner cover in a baffling way, so that the activated carbon nets can fully absorb the harmful gas after the purification treatment of the activated carbon nets can enter the filtering cavity from the diversion holes, the harmful gas can be purified again through the activated carbon particles, and the purification efficiency of the harmful gas is greatly improved.
Description
Technical Field
The utility model relates to the field of negative pressure hoods, in particular to a negative pressure hood.
Background
When laboratory is doing organic chemistry experiments, often can produce a large amount of poisonous and harmful organic waste gas, and common treatment method is outside with waste gas water conservancy diversion through the negative pressure cover to avoid the threat to experimenter's health, but current negative pressure cover still remains partial harmful gas because can't fully filter harmful gas, and the air of discharging needs to improve urgently.
Disclosure of Invention
The utility model aims to provide a negative pressure cover which is used for solving the problem that the conventional negative pressure cover cannot sufficiently filter harmful gases.
In order to solve the problem, this with novel negative pressure cover that provides, including dustcoat and inner cover, dustcoat internal fixation is equipped with first holding ring and second holding ring, inner cover demountable installation in the first holding ring, the roof of inner cover upwards extend and contradict in on the diapire of second holding ring, the outer wall of inner cover with form the filtration cavity between the inner wall of dustcoat, the filtration cavity intussuseption is filled with the active carbon granule, the inner cover is internal to be provided with the active carbon net in a staggered manner, a plurality of branch flow holes have all been seted up to the both sides of inner cover, the homonymy the branch flow hole is located two adjacent active carbon nets of homonymy respectively, the exhaust hole has been seted up to the symmetry on the second holding ring.
The negative pressure cover provided by the utility model also has the following technical characteristics:
further, the housing includes a cylindrical barrel portion and a conical barrel portion.
Further, a first connection flange is fixedly arranged at the top end of the cylindrical barrel part.
Further, a second connecting flange plate connected with the first positioning ring is fixedly arranged at the bottom end of the inner cover.
Further, the distance between the top wall of the second positioning ring and the top wall of the first connecting flange plate is 15-20cm.
Further, the exhaust gap between two adjacent activated carbon particles is 2-3cm.
Further, the upper and lower interval distance between two adjacent active carbon nets is 5-6cm.
Further, the outer cover and the inner cover are made of stainless steel.
The utility model has the following beneficial effects: through will the top of dustcoat is connected with negative pressure fan's exhaust end, with in taking out harmful gas in the laboratory to in the inner cover, harmful gas is in baffling is march in the inner cover, so that the active carbon net fully absorbs, simultaneously the process harmful gas after the active carbon net purification treatment can follow the reposition of redundant personnel hole gets into in the filtration cavity, through the active carbon granule can purify harmful gas once more, very big improvement to harmful gas's purification efficiency.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the negative pressure cover.
Detailed Description
The present utility model will be described in detail hereinafter with reference to the drawings in conjunction with the embodiments, and it should be noted that the embodiments of the present utility model and features of the embodiments may be combined with each other without conflict.
In an embodiment of the negative pressure cover of the present utility model shown in fig. 1, the negative pressure cover comprises an outer cover 10 and an inner cover 20, a first positioning ring 11 and a second positioning ring 12 are fixedly arranged in the outer cover 10, the inner cover 20 is detachably installed in the first positioning ring 11, the top wall of the inner cover 20 extends upwards and abuts against the bottom wall of the second positioning ring 12, a filtering cavity is formed between the outer wall of the inner cover 20 and the inner wall of the outer cover 10, activated carbon particles 30 are filled in the filtering cavity, activated carbon nets 21 are alternately arranged in the inner cover 20, a plurality of diversion holes 22 are formed in two sides of the inner cover 20, the diversion holes 22 on the same side are respectively located in two adjacent activated carbon nets 21 on the same side, and exhaust holes 121 are symmetrically formed in the second positioning ring 12.
In one embodiment of the present application, the housing 10 includes a cylindrical barrel portion 100 and a conical barrel portion 101.
In one embodiment of the present application, the top end of the cylindrical barrel portion 100 is fixedly provided with a first connection flange 102, specifically, the outer cover 10 is conveniently connected with the suction end of the negative pressure fan through the first connection flange 102 in a bolt manner.
In one embodiment of the present application, the bottom end of the inner cover 20 is fixedly provided with a second connection flange 103 connected with the first positioning ring 11.
In one embodiment of the present application, the top wall of the second retaining ring 12 is spaced from the top wall of the first connecting flange 102 by a distance of 15-20cm.
In one embodiment of the present application, the exhaust gap between two adjacent activated carbon particles 30 is 2-3cm.
In one embodiment of the present application, the vertical separation distance between two adjacent activated carbon nets 21 is 5-6cm.
In one embodiment of the present application, the outer cover 10 and the inner cover 20 are both made of stainless steel.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme recorded in the foregoing embodiments can be modified or the center technical features of the technical scheme can be replaced equivalently; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (8)
1. A negative pressure shield, characterized in that: including dustcoat and inner cover, dustcoat internal fixation is equipped with first holding ring and second holding ring, the inner cover demountable installation in the first holding ring, the roof of inner cover upwards extend and contradict in on the diapire of second holding ring, the outer wall of inner cover with form the filtration cavity between the inner wall of dustcoat, the intussuseption of filtration cavity is filled with the active carbon granule, the crisscross active carbon net that is provided with in the inner cover, a plurality of branch flow holes have all been seted up to the both sides of inner cover, the homonymy the branch flow hole is located two adjacent active carbon nets of homonymy respectively, the exhaust hole has been seted up to the symmetry on the second holding ring.
2. The negative pressure shield of claim 1, wherein: the housing includes a cylindrical barrel portion and a conical barrel portion.
3. The negative pressure housing of claim 2, wherein: the top end of the cylindrical barrel part is fixedly provided with a first connection flange.
4. A negative pressure shield according to claim 3, characterized in that: the bottom end of the inner cover is fixedly provided with a second connecting flange plate connected with the first positioning ring.
5. The negative pressure shield of claim 4, wherein: the distance between the top wall of the second positioning ring and the top wall of the first connecting flange plate is 15-20cm.
6. The negative pressure shield of claim 5, wherein: the exhaust gap between two adjacent active carbon particles is 2-3cm.
7. The negative pressure shield of claim 6, wherein: the upper and lower interval distance between two adjacent active carbon nets is 5-6cm.
8. The negative pressure shield of claim 7, wherein: the outer cover and the inner cover are made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322248291.3U CN220738944U (en) | 2023-08-21 | 2023-08-21 | Negative pressure cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322248291.3U CN220738944U (en) | 2023-08-21 | 2023-08-21 | Negative pressure cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220738944U true CN220738944U (en) | 2024-04-09 |
Family
ID=90552744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322248291.3U Active CN220738944U (en) | 2023-08-21 | 2023-08-21 | Negative pressure cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220738944U (en) |
-
2023
- 2023-08-21 CN CN202322248291.3U patent/CN220738944U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |