CN220170879U - Detection tool for negative pressure air flow protection barrier - Google Patents
Detection tool for negative pressure air flow protection barrier Download PDFInfo
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- CN220170879U CN220170879U CN202321293469.XU CN202321293469U CN220170879U CN 220170879 U CN220170879 U CN 220170879U CN 202321293469 U CN202321293469 U CN 202321293469U CN 220170879 U CN220170879 U CN 220170879U
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- guide tube
- negative pressure
- tool
- smoke guide
- protection barrier
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- 230000004888 barrier function Effects 0.000 title claims abstract description 31
- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 239000000443 aerosol Substances 0.000 claims abstract description 58
- 239000000779 smoke Substances 0.000 claims abstract description 45
- 238000005070 sampling Methods 0.000 claims description 20
- 230000001681 protective effect Effects 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims 2
- 230000003749 cleanliness Effects 0.000 abstract description 2
- 239000005357 flat glass Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
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Abstract
The utility model relates to the technical field of biological safety cabinet detection and discloses a detection tool for a negative pressure air flow protection barrier, which comprises a tool body, wherein a smoke guide tube and a thin soft tube are arranged on the tool body, the thin soft tube is positioned at the front end of the smoke guide tube, and the front end of the smoke guide tube and the tail end of the thin soft tube are oppositely arranged; the tail end of the smoke guide tube is sequentially communicated with a thick hose and an aerosol generator, and the front end of the thin hose is communicated with an aerosol photometer. According to the detection tool disclosed by the utility model, an operator can intuitively see whether aerosol exists in the front window operation opening or not, whether the cleanliness requirement is met or not, and the integrity and the stability of the negative pressure airflow protection barrier can be monitored.
Description
Technical Field
The utility model relates to the technical field of biological safety cabinet detection, in particular to a detection tool for a negative pressure airflow protection barrier.
Background
The II-level biosafety cabinet is a biosafety cabinet with a front window operation opening, and operators can operate in an operation area of the biosafety cabinet through the front window operation opening to protect personnel, products and environment in the operation process. The negative pressure air flow protective barrier sucked inwards by the front window operation opening is used for protecting the safety of personnel; the vertical air flow filtered by the high-efficiency air filter is used for protecting the sample to be tested; the air flow is filtered by the high-efficiency air filter and then discharged, so that the environment can be protected from pollution.
For the negative pressure air flow protection barrier of the front window operation opening, the flow rate value of the inflow air flow of the front window operation opening or the flow rate value of a plurality of points is read by adopting an anemometry or an anemometry at present, and the average inflow air flow rate is calculated to confirm that the biosafety cabinet operates at a nominal value air speed. Although this measurement method can measure the inflow rate and the average value, there are the following problems: firstly, whether pollutants such as aerosol exist in a front window operation opening or not cannot be intuitively displayed, and whether the cleanliness requirement is met or not; secondly, the integrity and stability of the negative pressure air flow protection barrier of the front window operation opening cannot be guaranteed, the position point of a certain inflow air flow of the front window may be incomplete or unstable, and therefore vertical downdraft turbulence in the operation area or pollution to experimental samples in the operation area can be caused, and cross infection is generated for experimental staff.
Disclosure of Invention
The utility model provides a detection tool for a negative pressure air flow protective barrier, which aims to solve the technical problems that in the prior art, the detection result of the negative pressure air flow of a front window operation opening of a biological safety cabinet is insufficient, the integrity and stability of the detection result are low, and the like.
The tool comprises a tool body, wherein a smoke guide tube and a thin soft tube are arranged on the tool body, the thin soft tube is positioned at the front end of the smoke guide tube, and the front end of the smoke guide tube and the tail end of the thin soft tube are oppositely arranged; the tail end of the smoke guide tube is sequentially communicated with a thick hose and an aerosol generator, and the front end of the thin hose is communicated with an aerosol photometer.
By adopting the technical scheme, the aerosol generated by the aerosol generator enters the smoke guide tube through the thick hose and is discharged from the front end of the smoke guide tube, and under the action of the suction force of the negative pressure air flow in the biosafety cabinet, the aerosol enters the air duct of the biosafety cabinet from the front window operation opening, if the suction force of the negative pressure air flow in the biosafety cabinet is insufficient, part of the aerosol can enter the hose forwards and reaches the aerosol dividing meter, the aerosol dividing meter can detect the aerosol, the fact that the aerosol exists in the front window operation opening of the biosafety cabinet is described, and the negative pressure air flow protection barrier is problematic.
When detecting the negative pressure air current protection barrier of biological safety cabinet front window operation mouth, operating personnel supports the frock body and holds biological safety cabinet's front window glass inboard and bottom, opens aerosol generator and aerosol photometer, removes the frock body from left to right along the lower border of front window glass, observes aerosol photometer's display data, can monitor the aerosol content everywhere of front window operation mouth in succession, namely monitors the integrality and the stability of negative pressure air current protection barrier.
Optionally, the frock body includes from last limit frame, chimney retainer ring and the support frame that connects gradually down.
By adopting the technical scheme, the limiting frame is propped against the inner side and the bottom of the front window glass, so that the tooling is conveniently limited, the determination of the position of the aerosol outlet and the detection position is realized, and the detection accuracy is improved; the smoke guide tube is embedded into the smoke guide tube fixing ring, so that the position of the smoke guide tube is conveniently fixed; the support frame is used for fixing the smoke guide tube fixing ring and the thin hose.
Optionally, the front end of locating rack is equipped with the limiting plate of vertical setting, and the bottom of limiting plate is equipped with the riser that stretches out forward, and the limiting plate is perpendicular with the riser.
Through adopting above-mentioned technical scheme, the front end of limiting plate supports the inboard of holding preceding window glass, and the riser supports the lower edge of holding preceding window glass, and then realizes the determination of frock position, and then realizes the determination of aerosol exit position and detection position, improves the accuracy of detection.
Optionally, the number of limiting plates and vertical plates is 2.
By adopting the technical scheme, the two positions of the lower edge of the front window glass are limited, so that the tooling is limited, the determination of the position of the aerosol outlet and the detection position is realized, and the detection accuracy is improved.
Optionally, the chimney fixing ring is horizontally placed, and the bottom of the chimney fixing ring is fixedly connected with the supporting frame.
Through adopting above-mentioned technical scheme, be convenient for place the chimney level, be convenient for firmly fix the chimney on the support frame.
Optionally, the support frame is L shape structure, and the front end of support frame is equipped with the sampling pipe, and the center pin of sampling pipe and the center pin coincidence of the fixed ring of chimney, the terminal of sampling pipe is equipped with the suction inlet, and the suction inlet is located the front end of the fixed ring of chimney.
By adopting the technical scheme, the aerosol emitted by the front end of the smoke guide tube is opposite to the suction port of the sampling tube, so that the aerosol at the front window operation opening is conveniently absorbed, and then the negative pressure airflow protection barrier at the front window operation opening is detected.
Optionally, an interface is arranged at the front end of the sampling tube and is used for connecting a thin hose.
Through adopting above-mentioned technical scheme, thin hose passes through interface connection with the sampling pipe, is convenient for realize thin hose's detachable connection.
Optionally, at least 2 straight-through thin round pipes are embedded in the smoke guide tube, and the straight-through thin round pipes are arranged in parallel with the smoke guide tube.
By adopting the technical scheme, aerosol introduced into the smoke guide tube is split through the straight-through thin round tube, so that the aerosol smog becomes stable and uniform after passing through the smoke guide tube.
In summary, the present utility model includes at least one of the following beneficial technical effects:
1. the aerosol generated by the aerosol generator enters the smoke guide tube through the thick hose, is discharged from the front end of the smoke guide tube, is subjected to the suction force of negative pressure air flow in the biosafety cabinet, enters the air duct of the biosafety cabinet from the front window operation opening, and can be detected by the aerosol dividing meter if the suction force of the negative pressure air flow in the biosafety cabinet is insufficient and part of the aerosol can enter the hose forwards to reach the aerosol dividing meter, so that the problem that the aerosol exists in the front window operation opening of the biosafety cabinet and the negative pressure air flow protective barrier exists is solved;
2. when detecting the negative pressure air current protection barrier of biological safety cabinet front window operation mouth, operating personnel supports the frock body and holds biological safety cabinet's front window glass inboard and bottom, opens aerosol generator and aerosol photometer, removes the frock body from left to right along the lower border of front window glass, observes aerosol photometer's display data, can monitor the aerosol content everywhere of front window operation mouth in succession, namely monitors the integrality and the stability of negative pressure air current protection barrier.
Drawings
FIG. 1 is an assembly diagram of a detection tool and a biosafety cabinet of a negative pressure air flow protective barrier according to an embodiment of the utility model;
FIG. 2 is a side view of an assembly of a detection tool and a biosafety cabinet of a negative pressure air flow protective barrier according to an embodiment of the utility model;
FIG. 3 is an enlarged view of a portion of a tooling assembly for detecting a negative pressure air flow protective barrier and a front window glass assembly according to an embodiment of the present utility model;
FIG. 4 is a schematic structural diagram of a tooling body according to an embodiment of the present utility model;
fig. 5 is an exploded view of the tool body according to the embodiment of the present utility model.
Reference numerals illustrate: 1. a tool body; 11. a limiting frame; 111. a limiting plate; 112. a vertical plate; 12. a chimney fixing ring; 13. a support frame; 131. a sampling tube; 2. a smoke guide tube; 21. straight thin round tube; 3. a thin hose; 4. a thick hose; 5. an aerosol generator; 6. aerosol photometer.
Detailed Description
The utility model is described in further detail below with reference to fig. 1-5.
The embodiment of the utility model discloses a detection tool for a negative pressure air flow protection barrier.
Referring to fig. 1-2, the tool comprises a tool body 1, wherein a smoke guide tube 2 and a thin soft tube 3 are arranged on the tool body 1, the thin soft tube 3 is positioned at the front end of the smoke guide tube 2, and the front end of the smoke guide tube 2 and the tail end of the thin soft tube 3 are arranged oppositely; the tail end of the smoke guide tube 2 is sequentially communicated with a thick hose 4 and an aerosol generator 5, and the front end of the thin hose 3 is communicated with an aerosol photometer 6.
Referring to fig. 4, the tool body 1 includes a limiting frame 11, a chimney fixing ring 12 and a supporting frame 13, which are sequentially connected from top to bottom.
Referring to fig. 4, a vertically disposed limiting plate 111 is disposed at the front end of the limiting frame 11, a vertical plate 112 extending forward is disposed at the bottom of the limiting plate 111, and the limiting plate 111 is perpendicular to the vertical plate 112. The number of the limiting plates 111 and the number of the vertical plates 112 are 2.
Referring to fig. 3, the stopper 111 abuts against the inner side of the front window glass, and the standing plate 112 abuts against the lower edge of the front window glass.
Referring to fig. 4-5, the chimney fixing ring 12 is horizontally placed, and the bottom of the chimney fixing ring 12 is fixedly connected with the supporting frame 13.
Referring to fig. 4-5, the support 13 has an L-shaped structure, the front end of the support 13 is provided with a sampling tube 131, the central axis of the sampling tube 131 coincides with the central axis of the chimney fixing ring 12, the tail end of the sampling tube 131 is provided with a suction port, and the suction port is positioned at the front end of the chimney fixing ring 12.
Referring to fig. 4 to 5, the front end of the sampling tube 131 is provided with a mouthpiece for connecting the thin hose 3.
Referring to fig. 5, at least 2 straight thin circular tubes 21 are embedded in the chimney 2, and the straight thin circular tubes 21 are arranged in parallel with the chimney 2.
Referring to fig. 1-2, the interface end of the thin hose 3 is positioned at the outer end of the front side of the tool frame body 1, and the suction port sampling end of the sampling tube 131 and the interface end of the thin hose 3 are positioned on the same linear shaft and positioned at the inner end of the front side of the tool frame body 1; the smoke guide tube fixing ring 12 and the suction port sampling end are on the same linear shaft and have a certain distance with the suction port sampling end; the support frame 13 is provided with a threaded hole which is positioned at the lower side of the tool frame body 1 and is used for being assembled with the smoke guide tube fixing ring 12, and the smoke guide tube fixing ring 12 is fixed on the support frame 13; the straight-through thin circular tube 21 is positioned inside the smoke guide tube 2; the smoke inlet is positioned at the rear side of the smoke guide tube 2; the smoke outlet is positioned at the front side of the smoke guide tube.
The aerosol photometer 6 can perform negative pressure inhalation sampling, and the aerosol generator 5 emits polydisperse aerosol particles and is in a smoke state; the chimney 2 is fixed on the tool body 1 through the chimney fixing ring 12; the detection tool of the negative pressure air flow protection barrier is connected with the aerosol photometer 6 through the thin hose 3, and the detection tool is connected with the aerosol generator 5 through the thick hose 4. The detection tool 1 is placed at the lower edge of the front window glass and is parallel to the operation table. Since the aerosol generator 5 emits polydisperse aerosol particles at high pressure, a plurality of straight-through thin round tubes 21 are provided inside the chimney 2, so that the aerosol smoke becomes a stable and uniform state after passing through the chimney 5.
Referring to fig. 1-2, when the biosafety cabinet device is in normal operation, the aerosol generator 5 and the aerosol photometer 6 are opened, the aerosol generator 5 emits polydisperse aerosol particles, the state of the aerosol is extremely unstable due to the pressure effect of the aerosol generator 5, the aerosol is enabled to be in a stable and uniform state after passing through the smoke guide tube 2 by arranging a plurality of straight-through thin round tubes 21 inside the smoke guide tube 2, the aerosol is detected to move uniformly left and right at the front window operation opening, and if the aerosol photometer 6 has alarm prompt all the time or has alarm prompt intermittently during the moving process, the negative pressure airflow protection barrier for indicating the position point has incompleteness or stability; otherwise, if the alarm prompt is not given, the negative pressure air flow protection barrier of the front window operation opening of the biosafety cabinet is integrity and stability.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (8)
1. The utility model provides a detection frock of negative pressure air current protection barrier which characterized in that: the tool comprises a tool body, wherein a smoke guide tube and a thin soft tube are arranged on the tool body, the thin soft tube is positioned at the front end of the smoke guide tube, and the front end of the smoke guide tube and the tail end of the thin soft tube are oppositely arranged; the tail end of the smoke guide tube is sequentially communicated with a thick hose and an aerosol generator, and the front end of the thin hose is communicated with an aerosol photometer.
2. The tool for detecting a negative pressure airflow protection barrier according to claim 1, wherein: the tool body comprises a limiting frame, a smoke guide tube fixing ring and a supporting frame which are sequentially connected from top to bottom.
3. The tool for detecting the negative pressure airflow protection barrier according to claim 2, wherein: the front end of the limiting frame is provided with a vertically arranged limiting plate, the bottom of the limiting plate is provided with a vertical plate extending forwards, and the limiting plate is perpendicular to the vertical plate.
4. A negative pressure air flow protective barrier detection tool according to claim 3, wherein: the number of the limiting plates and the number of the vertical plates are 2.
5. The tool for detecting the negative pressure airflow protection barrier according to claim 2, wherein: the fixed ring of the chimney is horizontally arranged, and the bottom of the fixed ring of the chimney is fixedly connected with the supporting frame.
6. The tool for detecting the negative pressure airflow protection barrier according to claim 2, wherein: the support frame is L-shaped structure, and the front end of support frame is equipped with the sampling pipe, and the center pin of sampling pipe coincides with the center pin of guide tube solid fixed ring, and the end of sampling pipe is equipped with the suction inlet, and the suction inlet is located the front end of guide tube solid fixed ring.
7. The tool for detecting a negative pressure airflow protection barrier according to claim 6, wherein: the front end of the sampling tube is provided with an interface for connecting a thin hose.
8. The tool for detecting a negative pressure airflow protection barrier according to claim 1, wherein: at least 2 straight-through thin round pipes are embedded in the smoke guide tube, and the straight-through thin round pipes are arranged in parallel with the smoke guide tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321293469.XU CN220170879U (en) | 2023-05-26 | 2023-05-26 | Detection tool for negative pressure air flow protection barrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321293469.XU CN220170879U (en) | 2023-05-26 | 2023-05-26 | Detection tool for negative pressure air flow protection barrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220170879U true CN220170879U (en) | 2023-12-12 |
Family
ID=89064924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321293469.XU Active CN220170879U (en) | 2023-05-26 | 2023-05-26 | Detection tool for negative pressure air flow protection barrier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220170879U (en) |
-
2023
- 2023-05-26 CN CN202321293469.XU patent/CN220170879U/en active Active
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