CN208443464U - A kind of dust determination instrument - Google Patents
A kind of dust determination instrument Download PDFInfo
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- CN208443464U CN208443464U CN201820767468.7U CN201820767468U CN208443464U CN 208443464 U CN208443464 U CN 208443464U CN 201820767468 U CN201820767468 U CN 201820767468U CN 208443464 U CN208443464 U CN 208443464U
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- sampling box
- dust
- screening box
- determination instrument
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Abstract
The utility model discloses a kind of dust determination instrument, are related to Pesticides Testing technical field, including sampling box and cover board, and cover board top is equipped with air inlet pipe；The outer wall of sampling box offers object placing cavity, and supporting table is equipped in object placing cavity, and bottom is equipped with pressure sensor, and top is equipped with the screening box containing filter cotton, and sampling outer box wall is equipped with display screen；Glove cavity wall offers through-hole in the two sides of screening box, is equipped with aspiration pump outside sampling box, is connected between aspiration pump and the through-hole outside object placing cavity and is equipped with pipeline, and pipeline is equipped with control assembly.It places a sample into sampling box, records first time pressure value, during the dust of sample is pumped, dust is absorbed by filter cotton, records pressure value again, and number pressure value difference is also the quality of dust twice.By the weight before rapid survey detection with filter cotton after detection, to obtain the dust quality of sample, detection mode is simple and quick；The measurement error in transfer measurement process is reduced, ensure that the precision of measurement.
Description
Technical field
The utility model relates to Pesticides Testing technical fields, more specifically, it relates to a kind of dust determination instrument.
Background technique
In Pesticides Testing, issuable dust is measured during granular pesticide sample needs to save it,
By the Dust Capacity of limitation granular formulations, the dust of pesticide sample during disposition and application is prevented to be discharged into air,
The injury to the producer and drug user is caused, domestic at present is also insufficient to the method for dust determination.
In view of the above-mentioned problems, patent announcement number is the Chinese patent of CN203772685U, a kind of granular formulations are proposed
Dust determination instrument, including sample collection case, cabinet the cover, commissioning pipe, filter, flowmeter and vacuum pump, the upper end of commissioning pipe
It is provided with stemless funnel, interval support device is provided between stemless funnel and commissioning pipe, the lower port of stemless funnel, which is located at, throws
In the middle part of expects pipe, and the lower port of stemless funnel is flushed with the upper port of commissioning pipe.
In above-mentioned patent in the detection process, the placement of sample and detecting step are sufficiently complex, troublesome in poeration, due to weight
Amount detection must weigh twice to sample, and check weighing process causes transfer tired often due to collecting box inside dust can be flown upward
Difficulty, sample, which can also volatilize, in transfer process causes check weighing inaccurate, influences final dust determination result.
Utility model content
The problem difficult for dust measurement in the prior art, precision is low, the utility model provide a kind of dust determination instrument,
It has the advantages that quickly detection, easy to operate, measurement accuracy is high.
To achieve the above object, the utility model provides following technical solution:
A kind of dust determination instrument is in the sampling box of hatch frame, the opening grafting setting of the sampling box including top
There is cover board, the cover board is provided with air inlet pipe far from the side of the sampling box；
The outer wall of the sampling box offers object placing cavity, and supporting table, the bottom of the supporting table are provided in the object placing cavity
Portion is provided with pressure sensor, and top is provided with screening box, has been filled with filter cotton, the sampling box in the screening box
Outer wall is provided with the display screen for showing the supporting table pressure；
The glove cavity wall offers through-hole in the two sides of the screening box, and pumping is provided with outside the sampling box
It pumps, is provided with and communicated with pipeline between the through-hole outside the aspiration pump and the object placing cavity, is provided on the pipeline for controlling
The control assembly of system pumping air pressure.
Through the above technical solutions, sample to be tested is placed in sampling box, the pressure value on display screen at this time is recorded,
After opening aspiration pump, sampling box extraneous gas is entered inside sampling box by air inlet pipe, and the dust of sample is pumped by pipeline
During, dust is absorbed by filter cotton, the pressure value on display screen at this time is recorded again, so that numerical difference is calculated, the number
Value difference is also the quality of dust.By the weight before rapid survey detection with filter cotton after detection, to obtain the dust of sample
Quality, detection mode are simple and quick；The measurement error caused in transfer measurement process is reduced, real-time detection ensure that measurement
Precision.
Further, the top setting of the supporting table is described solid there are two the fixed ring for clamping the screening box
Determine to be provided with and communicated with bellows between ring and the relatively described through-hole.
Through the above technical solutions, bellows can be with high-speed communication, simultaneously because bellows is soft by through-hole and fixed ring
Property to be indirectly connected between supporting table and sampling box, and minimum is played in the influence of bellows when supporting table check weighing.
Further, the both ends of the screening box are embedded with magnetite, and the fixed ring is towards the side of the screening box
Coaxially it is embedded with magnet ring.
Through the above technical solutions, screening box is inserted between fixed ring, in the work that attracts each other of magnetite and magnet ring
Under, screening box plays the effect for stablizing fixation.
Further, the both ends of the screening box are coaxially embedded with sealing ring.
Through the above technical solutions, reducing gap when screening box is clamped by two fixed rings by sealing ring, avoiding taking out
The loss of gas in the air pump course of work.
Further, the control assembly includes the connecting tube being placed on the pipeline, in the connecting tube along its length
Direction is movably set with glass marble, and one end of the connecting tube is provided with the controlling valve for adjusting openings of sizes.
Through the above technical solutions, gas will be by connecting tube during flowing in pipeline, and glass marble is held up, even
Nozzle interior is the conical surface, and the height held up from glass marble can distinguish the pressure size of gas, to be controlled by controlling valve
System.
Further, the sampling outer box wall is provided with the fixing seat for fixing the connecting tube.
Through the above technical solutions, the both ends of connecting tube are each attached on the outer wall of sampling box by fixing seat, sampling box is protected
Hold vertical state.
Further, the screening box is towards the side inside the sampling box in hatch frame, the bottom of the screening box
Wall offers multiple micropores.
Through the above technical solutions, filter cotton can be directly positioned in screening box, and micropore will not influence the flowing of gas.
Further, the open end of the sampling box is provided with multiple guide posts, offers on the cover board and the guide post
The guide hole of grafting adaptation.
Through the above technical solutions, the through-hole of cover board and the guide post of sampling box opening are mating, are formed and fixed, due to
Aspiration pump course of work cover plate will be compacted, and cover board is more stable.
Compared with prior art, the beneficial effects of the utility model are as follows:
(1) by the weight before rapid survey detection with filter cotton after detection, pass through the dust matter that weight difference obtains sample
Amount, simple and convenient, measuring speed is fast, is easy to use；
(2) caused weight error in transfer process can avoid by real-time detection, and then dust survey has been effectively ensured
The precision of amount.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of dust determination instrument；
Fig. 2 is the structural schematic diagram one of sampling box；
Fig. 3 is the structural schematic diagram two of sampling box；
Fig. 4 is the perspective view of the explosion of supporting table and screening box；
Fig. 5 is the cross-sectional view of connecting tube.
Appended drawing reference: 1, sampling box；2, cover board；3, air inlet pipe；4, object placing cavity；5, supporting table；6, pressure sensor；7, it sieves
Divide box；8, filter cotton；9, display screen；10, through-hole；11, aspiration pump；12, pipeline；13, fixed ring；14, bellows；15, magnetite；
16, magnet ring；17, sealing ring；18, connecting tube；19, glass marble；20, controlling valve；21, fixing seat；22, micropore；23, guide post；24,
Guide hole.
Specific embodiment
In order to keep the purpose of this utility model, technical scheme and beneficial effects clearer, below with reference to embodiment and attached
The utility model is described in further detail for figure, but the embodiments of the present invention is not limited only to this.
As shown in Figure 1, a kind of dust determination instrument, including sampling box 1, in a rectangular parallelepiped shape, 1 top of sampling box is in sampling box 1
Hatch frame, the opening grafting of sampling box 1 are provided with cover board 2, and cover board 2 is fixed vertically at the center far from 1 side of sampling box
Have an air inlet pipe 3, air inlet pipe 3 through cover board 2 and be connected to inside sampling box 1.Sampling box 1 is used to dispose sample to be detected, and
Air inlet pipe 3 enters inside sampling box 1 convenient for 1 extraneous gas of sampling box.
The surrounding of 1 open end of sampling box is fixed with multiple guide posts 23, and the side of cover board 2 offers and the grafting one by one of guide post 23
The guide hole 24 of adaptation.It is mating by the through-hole 10 of cover board 2 and the guide post 23 of 1 opening of sampling box, so that cover board 2 is more steady
It is fixed, reduce its shaking.
As shown in Figure 3 and Figure 4, the side outer wall of sampling box 1 offers object placing cavity 4, and pressure is fixed on the bottom wall of object placing cavity 4
Force snesor 6, the upper surface of pressure sensor 6 are fixed with supporting table 5, and supporting table 5 is fixed with far from one end of pressure sensor 6
Two fixed rings 13, two fixed rings 13 are coaxially disposed and have spacing.Grafting is provided with screening box 7 between two fixed rings 13,
The both ends of screening box 7 are abutted with fixed ring 13.The outer wall of sampling box 1 is fixed with display screen 9, and display screen 9 and pressure sensor 6 are believed
Number connection.Display screen 9 is for showing pressure value suffered by supporting table 5.
Sieving box 7 is in cylindrical shape box body, and screening box 7 is in hatch frame towards the side inside sampling box 1, sieves box 7
Opening in be filled with filter cotton 8, the bottom wall of screening box 7 offers multiple micropores 22.By the way that filter cotton 8 is directly disposed
In screening box 7, convenient for being collected to the dust that sample is fallen, and micropore 22 will not influence the flowing of gas, fixed ring 13
Box 7 is sieved for clamping, so that it will not shake.
As shown in figure 4, the both ends of screening box 7 are embedded with magnetite 15, the side of fixed ring 13 towards screening box 7 is coaxial
It is embedded with magnet ring 16.When sieving box 7 and being inserted between two fixed rings 13, by attracting each other for magnetite 15 and magnet ring 16,
Screening box 7 plays the effect for stablizing fixation.The both ends of screening box 7 are coaxially embedded with sealing ring 17, and sealing ring 17 is by magnetite 15
Package.The gap that junction can be reduced by sealing ring 17 avoids in the pumping course of work gas from the loss in gap.
As shown in Figures 2 and 3,4 inner wall of object placing cavity offers through-hole 10, one of through-hole in the two sides of screening box 7
10 towards 1 inner wall of sampling box, and towards outside sampling box 1, two through-holes 10 are coaxially set another through-hole 10 with fixed ring 13.
As shown in figure 4, being communicated with bellows 14 between the fixed ring 13 being oppositely arranged and through-hole 10.It will by bellows 14
Through-hole 10 and fixed ring 13 can be with high-speed communications, simultaneously because bellows 14 is soft so that between supporting table 5 and sampling box 1
It connects in succession, minimum is played in the influence of bellows 14 when 5 check weighing of supporting table.
As shown in Figure 1, sampling box 1 is externally-arranged with aspiration pump 11, between the through-hole 10 outside aspiration pump 11 and object placing cavity 4
It is communicated with pipeline 12, pipeline 12 is hose, and the control assembly for controlling pumping air pressure is provided on pipeline 12.
As shown in Figure 2 and Figure 5, control assembly includes the connecting tube 18 being placed on pipeline 12, the cutting of 12 middle position of pipeline
It is connected afterwards by connecting tube 18, connecting tube 18 is glass tube, and internal is the conical surface, and activity is set along its length in connecting tube 18
It is equipped with glass marble 19, one end of connecting tube 18 is fixed with the controlling valve 20 for adjusting openings of sizes, and the outer wall of sampling box 1 is fixed
There is the fixing seat 21 for being fixedly connected with pipe 18, fixing seat 21 is plate-like, and the both ends of connecting tube 18 wear fixing seat 21 respectively
Both ends.Gas will be by connecting tube 18 during flowing in pipeline 12, and holds up glass marble 19, holds up from glass marble 19
Height can distinguish the pressure size of gas, to carry out control pressure size by controlling valve 20.
The working principle and beneficial effect of the utility model is as follows:
Filter cotton 8 is first placed in screening box 7 by preparation, tester, then screening box 7 is connected to two fixations
Between ring 13, then sample to be tested is placed in sampling box 1, cover board 2 seals sampling box 1, and record is at this time on display screen 9
Pressure value is labeled as first time pressure value.
Work is detected, tester opens aspiration pump 11, and 1 extraneous gas of sampling box is entered in sampling box 1 by air inlet pipe 3
Portion, the dust that gas volatilizees with sample are pumped by pipeline 12, and dust is inhaled during passing through screening box 7 by filter cotton 8
It receives, records the pressure value on display screen 9 at this time again, be labeled as second of pressure value.
The numerical difference of first pressure value and second pressure value is found out, which is also the quality of dust.
The utility model is easy to operate, and measurement quickly, is easy to use, and is gone out before detecting by rapid survey and is filtered after detection
The weight of cotton 8, the dust quality of sample is obtained by weight difference, and measuring accuracy is high；It is effective to keep away simultaneously in detection process
Caused weight error in transfer process is exempted from, the precision of dust measurement has further been effectively ensured in real-time detection.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to
Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (8)
1. a kind of dust determination instrument, which is characterized in that it is in the sampling box (1) of hatch frame including top, the sampling box (1)
Opening grafting is provided with cover board (2), and the cover board (2) is provided with air inlet pipe (3) far from the side of the sampling box (1)；
The outer wall of the sampling box (1) offers object placing cavity (4), is provided with supporting table (5), the branch in the object placing cavity (4)
The bottom of support platform (5) is provided with pressure sensor (6), and top is provided with screening box (7), and filling is set in the screening box (7)
It is equipped with filter cotton (8), sampling box (1) outer wall is provided with the display screen (9) for showing the supporting table (5) pressure；
Object placing cavity (4) inner wall offers through-hole (10) in the two sides of screening box (7), and the sampling box (1) is external
It is provided with aspiration pump (11), is provided with and communicated with pipe between the aspiration pump (11) and the through-hole (10) of the object placing cavity (4) outside
Road (12) is provided with the control assembly for controlling pumping air pressure on the pipeline (12).
2. dust determination instrument according to claim 1, which is characterized in that there are two the top settings of the supporting table (5)
For clamping the fixed ring (13) of screening box (7), it is connected to and sets between the fixed ring (13) and the relatively described through-hole (10)
It is equipped with bellows (14).
3. dust determination instrument according to claim 2, which is characterized in that the both ends of screening box (7) are embedded with magnetic
The side of stone (15), the fixed ring (13) towards screening box (7) is coaxially embedded with magnet ring (16).
4. dust determination instrument according to claim 3, which is characterized in that the both ends of screening box (7) are coaxially embedded
There are sealing ring (17).
5. dust determination instrument according to claim 1, which is characterized in that the control assembly includes being placed in the pipeline
(12) connecting tube (18) on, the connecting tube (18) is interior to be movably set with glass marble (19), the connection along its length
One end of pipe (18) is provided with the controlling valve (20) for adjusting openings of sizes.
6. dust determination instrument according to claim 5, which is characterized in that sampling box (1) outer wall is provided with for solid
The fixing seat (21) of the fixed connecting tube (18).
7. dust determination instrument according to claim 1, which is characterized in that the screening box (7) is towards the sampling box (1)
Internal side is in hatch frame, and the bottom wall of screening box (7) offers multiple micropores (22).
8. dust determination instrument according to claim 1, which is characterized in that the open end of the sampling box (1) is provided with more
A guide post (23) offers the guide hole (24) being adapted to the guide post (23) grafting on the cover board (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820767468.7U CN208443464U (en) | 2018-05-22 | 2018-05-22 | A kind of dust determination instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820767468.7U CN208443464U (en) | 2018-05-22 | 2018-05-22 | A kind of dust determination instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208443464U true CN208443464U (en) | 2019-01-29 |
Family
ID=65091397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820767468.7U Active CN208443464U (en) | 2018-05-22 | 2018-05-22 | A kind of dust determination instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN208443464U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113959891A (en) * | 2021-10-23 | 2022-01-21 | 浙江必利夫检测科技有限公司 | Be applied to occupational health short-term test instrument |
-
2018
- 2018-05-22 CN CN201820767468.7U patent/CN208443464U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113959891A (en) * | 2021-10-23 | 2022-01-21 | 浙江必利夫检测科技有限公司 | Be applied to occupational health short-term test instrument |
| CN113959891B (en) * | 2021-10-23 | 2024-04-12 | 浙江必利夫检测科技有限公司 | Be applied to occupational health short-term test instrument |
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