CN103962361A - Scanning leakage detection efficient negative-pressure exhaust hood - Google Patents
Scanning leakage detection efficient negative-pressure exhaust hood Download PDFInfo
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- CN103962361A CN103962361A CN201410185103.XA CN201410185103A CN103962361A CN 103962361 A CN103962361 A CN 103962361A CN 201410185103 A CN201410185103 A CN 201410185103A CN 103962361 A CN103962361 A CN 103962361A
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- Prior art keywords
- exhaust hood
- scanning
- pressure exhaust
- leak detection
- negative
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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 scanning leakage detection efficient negative-pressure exhaust hood which comprises a box body. The hollow portion of the box body is internally provided with an efficient filter. The two sides of the efficient filter are fixed through fixing pressing plates. Sealing frames are arranged above the positions where the efficient filter is connected with the fixing pressing plates. A gas collection box and a transmission box are sequentially installed on one sealing frame from the box wall to the interior of the box body. A support is fixedly arranged on the other sealing frame. A linear scanning device and a sampling pipe are installed between the transmission box and the support. One end of the sampling pipe is connected with the linear scanning device, and the other end of the sampling pipe is communicated with the gas collection box. According to the scanning leakage detection efficient negative-pressure exhaust hood, noxious gas can be efficiently filtered out and exhausted inside a working area, noxious substances are prevented from polluting environment and an exhaust pipeline, and safety of environment and safety of an experimenter are protected; the linear scanning leakage detection mode is adopted to conduct in-situ leakage detection on the efficient filter, the mode of synchronous disinfection with a laboratory is adopted to conduct sterilization, and the scanning leakage detection efficient negative-pressure exhaust hood has the advantages of being little in investment, protecting environment, conducting efficient exhaust and the like.
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 first room air to be sucked to exhaust hood, then pernicious gas is discharged and taken away.This exhaust hood can endanger environment in the time of work, pollutes air draft pipeline.In prior art, for fear of the pollution of environment and air draft pipeline, the improved procedure conventionally adopting is to increase corresponding air filtration, decontamination system or device at exhaust blower entrance, and this shortcoming of improving one's methods is: investment is large; Can not carry out original position leak detection and sterilization; Long-term operation after-filter resistance increases, and exhaust air rate deficiency can not Yin Chengchaozuo district or equipment negative pressure around, can not effectively protect staff.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of scanning leak detection high-efficiency negative-pressure exhaust hood, can solve the problems referred to above that existing exhaust hood exists.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of scanning leak detection high-efficiency negative-pressure exhaust hood is provided, comprises 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; The joining place top of described high efficiency particulate air filter and described fixation clip is respectively equipped with a sealing frame; Described in one of them, in sealing frame, plenum chamber and transmission case are installed in the direction along tank wall to box house successively, the below of described plenum chamber is provided with a thief hatch; Described in another, in sealing frame, be fixed with support, between described transmission case and described support, linear scan device and sampling pipe be installed, one end of described sampling pipe is connected with described linear scan device, and its other end is communicated with described plenum chamber.
In a preferred embodiment of the present invention, described linear scan device comprises 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 fixed on described support, described scanning screw rod is arranged on described fixing channel bar, on described scanning screw rod, described probe is installed, 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 pipe is connected with the probe on described linear scan device.After starter 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 collects gas, deliver gas to thief hatch by sampling pipe, and then gas is delivered in the outside leak detector being connected with thief hatch.
In a preferred embodiment of the present invention, in described thief hatch, stop valve is installed, realize the opening and closing of thief hatch.
In a preferred embodiment of the present invention, described thief hatch below is provided with a dodge gate between described casing wall and contiguous fixation clip, is the stop leakage in the roof interface channel of instrument of thief hatch and outside in this dodge gate.
In a preferred embodiment of the present invention, between described sealing frame and described high efficiency particulate air filter, be provided with flume seal glue.By the dual sealing functions of sealing frame and hydraulic packing groove, to prevent that gas from overflowing by the gap between high efficiency particulate air filter and fixation clip.
In a preferred embodiment of the present invention, the lower end of described fixation clip is fixed with fixed screw.
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, special exhaust blower is also installed on the pipeline of described exhaust hood upper port.Special exhaust blower makes the exhaust air rate of exhaust hood stable, avoids the air draft performance of exhaust hood to be subject to the impact of other exhaust equipment.
The invention has the beneficial effects as follows: a kind of scanning leak detection high-efficiency negative-pressure of the present invention exhaust hood, it can carry out pernicious gas high efficiency filter and discharge in workspace, has avoided nuisance contaminated environment and air draft pipeline, has effectively protected environment and experimenter's safety; Adopt linear scan leak detection mode to carry out original position leak detection to high efficiency particulate air filter, and can show in real time the filtration resistance of high efficiency particulate air filter, guarantee that exhaust hood works efficiently.The present invention has small investment, protection of the environment, can real-time online detects and the advantage such as high efficiency exhaustion.
Brief description of the drawings
Fig. 1 is the perspective view of scanning leak detection high-efficiency negative-pressure exhaust hood of the present invention one preferred embodiment;
Fig. 2 be shown in the structural representation of linear scan 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 mark 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 pipes, 15. probes, 16. supports, 17. fixing channel bars, 18. Timing Belts, 19. motors, 20. line style scanning means.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Refer to accompanying drawing, the embodiment of the present invention comprises:
Embodiment 1
A kind of scanning leak detection high-efficiency negative-pressure exhaust hood, comprises casing 4, and 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 fixing by fixation clip 7, and the lower end of fixation clip 7 is fixing with fixed screw 8.
High efficiency particulate air filter 3 is respectively equipped with a sealing frame 6 with the joining place top of fixation clip 7, between sealing frame 6 and high efficiency particulate air filter 3, be also provided with flume seal glue 5, by the dual sealing functions of sealing frame 6 and hydraulic packing groove 5, can prevent that gas from overflowing by the gap between high efficiency particulate air filter and fixation clip.In one of them sealing frame 6, plenum chamber 11 and transmission case 10 are installed in the direction along tank wall to box house successively, in described another sealing frame 6, are fixed with support 16, linear scan device 20 and sampling pipe 14 are installed between transmission case 10 and support 16; Described linear scan device 20 comprises scanning screw rod 2, fixing channel bar 17, probe 15, Timing Belt 18 and motor 19, described fixing channel bar 17 one end are 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 pipe 14 is connected with the probe 15 on described linear scan device 20, and its other end is connected with described plenum chamber 11.After starter 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 collects gas, deliver gas to thief hatch by sampling pipe, and then gas is delivered in the outside leak detector being connected with thief hatch.
The below of described plenum chamber 11 is provided with a thief hatch 13, and stop valve 12 is installed in it, in order to control the opening and closing of thief hatch; The below of thief hatch 13 is provided with a dodge gate 9 between described casing wall and the fixation clip 7 of vicinity.It is the stop leakage in the roof interface channel of instrument of thief hatch and outside in this dodge gate.
The feature of said exhaust cover is that pernicious gas is upwards discharged from operating table surface or equipment top, form local decompression region, the pernicious gas producing can get rid of operating surface or equipment operation time, draws into operating space or equipment negative pressure around simultaneously, and nuisance is taken away to discharge.It adopts linear scan leak detection mode, can carry out original position leak detection to high efficiency particulate air filter, and employing is synchronizeed the mode of sterilizing to the high efficiency particulate air filter sterilizing that carries out disinfection with laboratory.And can show in real time the filtration resistance of high efficiency particulate air filter.
The operation principle of said exhaust cover is: after starter 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 pipe, and then gas is delivered in the outside leak detector being connected with thief hatch.After leakage detecting instrument is analyzed the gas gathering, leak detector can show in the gas that gathers, whether dust particle exceeds standard, can judge whether this high efficiency particulate air filter occurs damaging, after evil gas filtered from directly discharging, pipeline and surrounding enviroment, personnel are damaged preventing, while avoiding artificial scanning to stop leakage in the roof, the sample collecting is disturbed simultaneously.
This scanning leak detection high-efficiency negative-pressure exhaust hood does not arrange special exhaust blower, for unpowered type exhaust hood, it is the exhaust hood negative pressure causing while leaning on exhaust blower air draft, the pernicious gas producing during by the operation of in-house operation district or equipment is discharged, its advantage be simple in structure, cost is low, can be installed in parallel with experimental laboratory air exhausting pipe; Be applicable to the experiment of negative-pressure experimental laboratory operation, as centrifugal, encapsulation etc.
Embodiment 2
Be with the difference of embodiment 1, special exhaust blower is installed on the pipeline of exhaust hood upper port.
This exhaust hood is dynamic formula scanning leak detection high-efficiency negative-pressure exhaust hood, to discharge 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, not affected by other exhaust equipment, is applicable to the experiment of normal pressure laboratory operation.As centrifugal, packing etc.
Above-mentioned two kinds of scanning leak detection high-efficiency negative-pressure exhaust hoods, adopt linear scan leak detection mode, and high efficiency particulate air filter is carried out to original position leak detection, and employing is synchronizeed the mode of sterilizing to the high efficiency particulate air filter sterilizing that carries out disinfection with laboratory.And can show in real time the filtration resistance of high efficiency particulate air filter.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. a scanning leak detection high-efficiency negative-pressure exhaust hood, is characterized in that, comprises the hollow box body (4) of an equal opening of upper and lower side, and 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 fixing by fixation clip (7); Described high efficiency particulate air filter (3) is respectively equipped with a sealing frame (6) with the joining place top of described fixation clip (7); Sealing frame described in one of them (6) is upper, and plenum chamber (11) and transmission case (10) are installed in the direction along tank wall to box house successively, and the below of described plenum chamber (11) is provided with a thief hatch (13); In sealing frame described in another (6), be fixed with support (16), linear scan device (20) and sampling pipe (14) are installed between described transmission case (10) and described support (16), one end of described sampling pipe (14) is connected with described linear scan device (20), and its other end is communicated with described plenum chamber (11).
2. scanning leak detection high-efficiency negative-pressure exhaust hood according to claim 1, it is characterized in that, described linear scan device (20) comprises 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), described probe (15) is installed on described scanning screw rod (2), 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 pipe (14) is connected with the probe (15) on described linear scan device (20).
3. scanning leak detection high-efficiency negative-pressure exhaust hood according to claim 1, is characterized in that, stop valve (12) is installed in described thief hatch (13).
4. scanning leak detection high-efficiency negative-pressure exhaust hood according to claim 1, is characterized in that, described thief hatch (13) below is positioned between described casing wall and the fixation clip (7) of vicinity and is provided with a dodge gate (9).
5. scanning leak detection high-efficiency negative-pressure exhaust hood according to claim 1, is characterized in that, between described sealing frame (6) and described high efficiency particulate air filter (3), is provided with flume seal glue (5).
6. scanning leak detection high-efficiency negative-pressure exhaust hood according to claim 1, is characterized in that, the fixed screw for lower end (8) of described fixation clip (7) is fixing.
7. scanning leak detection high-efficiency negative-pressure exhaust hood according to claim 1, is characterized in that, the upper port diameter of described exhaust hood casing (4) is less than its lower port diameter.
8. according to the scanning leak detection high-efficiency negative-pressure exhaust hood one of claim 1 to 7 Suo Shu, it is characterized in that, special exhaust blower is also installed 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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN103962361A true CN103962361A (en) | 2014-08-06 |
| CN103962361B CN103962361B (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410185103.XA Active CN103962361B (en) | 2014-05-05 | 2014-05-05 | Scanning leak detection high-efficiency negative-pressure exhaust hood |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145823A (en) * | 2019-06-20 | 2019-08-20 | 青海省地方病预防控制所 | A kind of scan-type high-efficient purification return air gas collecting apparatus |
| 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 |
| 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 |
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Cited By (6)
| 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 |
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| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103962361B (en) | 2016-10-05 |
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