CN103962361B - Scanning leak detection high-efficiency negative-pressure exhaust hood - Google Patents
Scanning leak detection high-efficiency negative-pressure exhaust hood Download PDFInfo
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- CN103962361B CN103962361B CN201410185103.XA CN201410185103A CN103962361B CN 103962361 B CN103962361 B CN 103962361B CN 201410185103 A CN201410185103 A CN 201410185103A CN 103962361 B CN103962361 B CN 103962361B
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- exhaust hood
- scanning
- high efficiency
- leak detection
- air filter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
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- Sampling And Sample Adjustment (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a kind of scanning leak detection high-efficiency negative-pressure exhaust hood, including casing, the empty part of described casing is built-in with high efficiency particulate air filter, the both sides of described high efficiency particulate air filter are fixed by fixation clip, high efficiency particulate air filter is arranged over sealing frame with the joining place of fixation clip, in one of them sealing frame along tank wall to the direction of box house on be sequentially installed with plenum chamber and transmission case, it is fixed with support in another sealing frame, linear scanning device and sampling tube are installed between described transmission case and support, one end of sampling tube is connected with linear scanning device, the other end connects with plenum chamber.Harmful gas can carry out high efficiency filter in working area and discharge by the present invention, it is to avoid nuisance pollutes environment and air draft pipeline, protects the safety of environment and experimenter；Use linear scanning leak detection mode to carry out high efficiency particulate air filter hunting leak in situ, and use the mode of sterilization Tong Bu with laboratory to carry out disinfection sterilizing, there is small investment, protect the advantage such as environment and high efficiency exhaustion.
Description
Technical field
The present invention relates to exhaust equipment field, particularly relate to a kind of scanning leak detection high-efficiency negative-pressure exhaust hood.
Background technology
Traditional common exhaust hood is that room air first sucks exhaust hood, then harmful gas discharge is taken away.This exhaust hood operationally can endanger environment, pollutes air draft pipeline.In prior art, in order to avoid environment and the pollution of air draft pipeline, the improved procedure generally used is to increase corresponding air filtration, decontamination system or device at exhaust blower entrance, and the shortcoming of this improved method is: investment is big；Can not carry out hunting leak and sterilizing in situ；Longtime running after-filter resistance increases, and exhaust air rate is not enough, it is impossible to negative pressure around Yin Chengchaozuo district or equipment, it is impossible to effectively protect staff.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of scanning leak detection high-efficiency negative-pressure exhaust hood, it is possible to solve the problems referred to above that existing exhaust hood exists.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provide a kind of scanning leak detection high-efficiency negative-pressure exhaust hood, and including the hollow box body of an equal opening of upper and lower side, the upper port of described casing is built-in with biological closed unit；The hollow space of described casing is built-in with high efficiency particulate air filter, and the both sides of described high efficiency particulate air filter are fixed by fixation clip；Described high efficiency particulate air filter is respectively equipped with a sealing frame above the joining place of described fixation clip；In one of them described sealing frame, along tank wall to the direction of box house on be sequentially installed with plenum chamber and transmission case, the lower section of described plenum chamber is provided with a thief hatch；Being fixed with support in another described sealing frame, be provided with linear scanning device and sampling tube between described transmission case and described support, one end of described sampling tube is connected with described linear scanning device, and its other end connects with described plenum chamber.
In a preferred embodiment of the present invention, described linear scanning device includes scanning screw rod, fixing channel bar, probe, Timing Belt and motor, one end of described fixing channel bar is arranged on described transmission case, its other end is fixing on the bracket, described scanning screw rod is arranged on described fixing channel bar, and described scanning screw rod is provided with described probe, and one end of described scanning screw rod is fixed on described Timing Belt, described Timing Belt is arranged on described motor, and described motor is arranged in transmission case；Described sampling tube is connected with the probe on described linear scanning device.After starting motor, power is passed to the scanning screw rod being arranged on fixing channel bar by transmission case, and probe slowly moves under dynamic action, and collects gas, deliver gas to thief hatch by sampling tube, and then gas is delivered in the outside leak detector that is connected with thief hatch.
In a preferred embodiment of the present invention, in described thief hatch, stop valve is installed, it is achieved the opening and closing of thief hatch.
In a preferred embodiment of the present invention, between described casing wall and neighbouring fixation clip, below described thief hatch, it is provided with a dodge gate, the interface channel of instrument of stopping leakage in the roof in this dodge gate for thief hatch and outside.
In a preferred embodiment of the present invention, between described sealing frame and described high efficiency particulate air filter, it is provided with flume seal glue.By sealing frame and the dual sealing functions of hydraulic packing groove, overflow with the gap preventing gas from passing through between high efficiency particulate air filter and fixation clip.
In a preferred embodiment of the present invention, the lower end fixed screw of described fixation clip is fixed.
In a preferred embodiment of the present invention, the upper port diameter of described exhaust hood casing is less than its lower port diameter.
In a preferred embodiment of the present invention, the pipeline of described exhaust hood upper port is also equipped with special exhaust blower.Special exhaust blower makes the exhaust air rate of exhaust hood stablize, it is to avoid the air draft performance of exhaust hood is affected by other exhaust equipment.
The invention has the beneficial effects as follows: one scanning leak detection high-efficiency negative-pressure exhaust hood of the present invention, harmful gas can be carried out high efficiency filter in working area and discharge by it, it is to avoid nuisance pollutes environment and air draft pipeline, effectively protects the safety of environment and experimenter；Use linear scanning leak detection mode high efficiency particulate air filter to be carried out in situ to hunt leak, and the filtration resistance of high efficiency particulate air filter can be shown in real time, it is ensured that exhaust hood works efficiently.The present invention have small investment, protection environment, can real-time online detection and the advantage such as high efficiency exhaustion.
Accompanying drawing explanation
Fig. 1 is the perspective view of scanning leak detection high-efficiency negative-pressure exhaust hood one preferred embodiment of the present invention；
Fig. 2 is the structural representation of shown linear scanning device；
Fig. 3 is the surface structure schematic diagram of scanning leak detection high-efficiency negative-pressure exhaust hood of the present invention；
In accompanying drawing, the labelling of each parts is as follows: 1. biological closed unit, 2. scanning screw rod, 3. high efficiency particulate air filter, 4. casing, 5. flume seal glue, 6. sealing frame, 7. fixation clip, 8. fixed screw, 9. dodge gate, 10. transmission case, 11. plenum chambers, 12. stop valves, 13. thief hatch, 14. sampling tubes, 15. probes, 16. supports, 17. fix channel bar, 18. Timing Belts, 19. motors, 20. line style scanning means.
Detailed description of the invention
Below in conjunction with the accompanying drawings presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention can be easier to be readily appreciated by one skilled in the art, thus protection scope of the present invention is made apparent clear and definite defining.
Referring to accompanying drawing, the embodiment of the present invention includes:
Embodiment 1
A kind of scanning leak detection high-efficiency negative-pressure exhaust hood, including casing 4, this casing 4 is the hollow structure of the equal opening of upper and lower side, and the diameter of its upper port is less than the diameter of its lower port；The upper port of described casing 4 is built-in with biological closed unit 1, and its hollow space is built-in with high efficiency particulate air filter 3, and the both sides of described high efficiency particulate air filter 3 are fixed by fixation clip 7, and the lower end of fixation clip 7 fixed screw 8 is fixed.
High efficiency particulate air filter 3 is respectively equipped with a sealing frame 6 above the joining place of fixation clip 7, flume seal glue 5 it is additionally provided with between sealing frame 6 and high efficiency particulate air filter 3, by sealing frame 6 and the dual sealing functions of hydraulic packing groove 5, the gap that can prevent gas from passing through between high efficiency particulate air filter and fixation clip is overflowed.In one of them sealing frame 6, along tank wall to the direction of box house on be sequentially installed with plenum chamber 11 and transmission case 10, another sealing frame 6 described is fixed with support 16, linear scanning device 20 and sampling tube 14 is installed between transmission case 10 and support 16；Described linear scanning device 20 includes scanning screw rod 2, fixing channel bar 17, probe 15, Timing Belt 18 and motor 19, described fixing channel bar 17 one end is arranged on described transmission case 10, its other end is fixed on described support 16, described scanning screw rod 2 is arranged on described fixing channel bar 17, described probe 15 is installed on it, its one end is fixed on described Timing Belt 18, and described Timing Belt 18 is arranged on described motor 19, and described motor 19 is arranged in transmission case；One end of described sampling tube 14 is connected with the probe 15 on described linear scanning device 20, and its other end is connected with described plenum chamber 11.After starting motor, power is passed to the scanning screw rod being arranged on fixing channel bar by transmission case, and probe slowly moves under dynamic action, and collects gas, deliver gas to thief hatch by sampling tube, and then gas is delivered in the outside leak detector that is connected with thief hatch.
The lower section of described plenum chamber 11 is provided with a thief hatch 13, is provided with stop valve 12 in it, in order to control the opening and closing of thief hatch；The lower section of thief hatch 13 is provided with a dodge gate 9 between described casing wall and neighbouring fixation clip 7.The interface channel of the interior instrument of stopping leakage in the roof for thief hatch and outside of this dodge gate.
The feature of said exhaust cover is harmful gas to be discharged upward above from operating table surface or equipment, forms local decompression region, the harmful gas produced when can get rid of operating surface or equipment operation, draws into negative pressure around operating space or equipment simultaneously, nuisance is taken away discharge.It uses linear scanning to hunt leak mode, can carry out high efficiency particulate air filter hunting leak in situ, and uses the mode of sterilization Tong Bu with laboratory to carry out disinfection high efficiency particulate air filter sterilizing.And the filtration resistance of high efficiency particulate air filter can be shown in real time.
The operation principle of said exhaust cover is: after starting motor, by transmission case, power is passed to the scanning screw rod being arranged on fixing channel bar, probe slowly moves under dynamic action, and collect gas, deliver gas to thief hatch by sampling tube, and then gas is delivered in the outside leak detector that is connected with thief hatch.After the gas that collection comes is analyzed by leakage detecting instrument, in leak detector can show the gas that collection comes, whether dust particle exceeds standard, i.e. can determine whether whether this high efficiency particulate air filter occurs damaging, to prevent evil gas filtered from after being expelled directly out, pipeline and surrounding enviroment, personnel being damaged, to the sample interference collected simultaneously when avoiding either scans to stop leakage in the roof.
This scanning leak detection high-efficiency negative-pressure exhaust hood is not provided with special exhaust blower, for unpowered type exhaust hood, the exhaust hood negative pressure caused when being by exhaust blower air draft, the harmful gas produced when in-house operation district or equipment being run is discharged, and its advantage is simple in construction, cost is low, can be installed in parallel with experimental laboratory air exhausting pipe；Relatively it is applicable to the experiment of negative-pressure experimental laboratory operation, such as centrifugal, encapsulation etc..
Embodiment 2
Difference with embodiment 1 is, is provided with special exhaust blower on the pipeline of exhaust hood upper port.
This exhaust hood is dynamic formula scanning leak detection high-efficiency negative-pressure exhaust hood, to be discharged by pipeline by the gas after scanning leak detection high efficiency filter by carrying special exhaust blower, its advantage is that exhaust air rate is stable, is not affected by other exhaust equipment, is relatively applicable to the experiment of normal pressure laboratory operation.Such as centrifugal, subpackage etc..
Above two scanning leak detection high-efficiency negative-pressure exhaust hood, uses linear scanning leak detection mode, carries out high efficiency particulate air filter hunting leak in situ, and uses the mode of sterilization Tong Bu with laboratory to carry out disinfection high efficiency particulate air filter sterilizing.And the filtration resistance of high efficiency particulate air filter can be shown in real time.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the invention and accompanying drawing content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in the scope of patent protection of the present invention.
Claims (6)
1. a scanning leak detection high-efficiency negative-pressure exhaust hood, it is characterised in that include the hollow box body (4) of an equal opening of upper and lower side, the upper port of described casing (4) is built-in with biological closed unit (1)；The hollow space of described casing (4) is built-in with high efficiency particulate air filter (3), and the both sides of described high efficiency particulate air filter (3) are fixed by fixation clip (7)；Described high efficiency particulate air filter (3) is respectively equipped with a sealing frame (6) above the joining place of described fixation clip (7)；In one of them described sealing frame (6), along tank wall to the direction of box house on be sequentially installed with plenum chamber (11) and transmission case (10), the lower section of described plenum chamber (11) is provided with a thief hatch (13)；It is fixed with support (16) in another described sealing frame (6), linear scanning device (20) and sampling tube (14) are installed between described transmission case (10) and described support (16), one end of described sampling tube (14) is connected with described linear scanning device (20), and its other end connects with described plenum chamber (11)；Flume seal glue (5) it is provided with between described sealing frame (6) and described high efficiency particulate air filter (3)；
Described linear scanning device (20) includes scanning screw rod (2), fixing channel bar (17), probe (15), Timing Belt (18) and motor (19), one end of described fixing channel bar (17) is arranged on described transmission case (10), its other end is fixed on described support (16), described scanning screw rod (2) is arranged on described fixing channel bar (17), on described scanning screw rod (2), described probe (15) is installed, one end of described scanning screw rod (2) is fixed on described Timing Belt (18), described Timing Belt (18) is arranged on described motor (19), described motor (19) is arranged in transmission case；Described sampling tube (14) is connected with the probe (15) on described linear scanning device (20).
2. according to the scanning leak detection high-efficiency negative-pressure exhaust hood described in claim 1, it is characterised in that be provided with stop valve (12) in described thief hatch (13).
3. according to the scanning leak detection high-efficiency negative-pressure exhaust hood described in claim 1, it is characterised in that described thief hatch (13) lower section is positioned between described tank wall face and neighbouring fixation clip (7) and is provided with a dodge gate (9).
4. according to the scanning leak detection high-efficiency negative-pressure exhaust hood described in claim 1, it is characterised in that the lower end fixed screw (8) of described fixation clip (7) is fixed.
5. according to the scanning leak detection high-efficiency negative-pressure exhaust hood described in claim 1, it is characterised in that the upper port diameter of described exhaust hood casing (4) is less than its lower port diameter.
6. according to the scanning leak detection high-efficiency negative-pressure exhaust hood one of claim 1 to 5 Suo Shu, it is characterised in that be also equipped with special exhaust blower on the pipeline of described exhaust hood upper port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410185103.XA CN103962361B (en) | 2014-05-05 | 2014-05-05 | Scanning leak detection high-efficiency negative-pressure exhaust hood |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410185103.XA CN103962361B (en) | 2014-05-05 | 2014-05-05 | Scanning leak detection high-efficiency negative-pressure exhaust hood |
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| CN103962361A CN103962361A (en) | 2014-08-06 |
| CN103962361B true CN103962361B (en) | 2016-10-05 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10578521B1 (en) | 2017-05-10 | 2020-03-03 | American Air Filter Company, Inc. | Sealed automatic filter scanning system |
| US11181461B2 (en) | 2018-09-07 | 2021-11-23 | American Air Filter Company, Inc. | Filter testing apparatus and method |
| CN110145823B (en) * | 2019-06-20 | 2024-04-09 | 青海省地方病预防控制所 | Scanning type efficient purifying return air gas collecting device |
| CN110576466A (en) * | 2019-10-31 | 2019-12-17 | 湖南常德九品福绿色食品有限公司 | Automatic cutting equipment of hot pepper |
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| US3885437A (en) * | 1974-02-26 | 1975-05-27 | Us Energy | Device for sampling exhaust stack effluent |
| US4494403A (en) * | 1982-07-14 | 1985-01-22 | Flanders Filters, Inc. | Filter testing apparatus and method |
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