CN2126420U - Computer quick sampler for dust - Google Patents
Computer quick sampler for dust Download PDFInfo
- Publication number
- CN2126420U CN2126420U CN 92218147 CN92218147U CN2126420U CN 2126420 U CN2126420 U CN 2126420U CN 92218147 CN92218147 CN 92218147 CN 92218147 U CN92218147 U CN 92218147U CN 2126420 U CN2126420 U CN 2126420U
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- sampling
- dust
- filter membrane
- anchor clamps
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Abstract
The utility model discloses a computer quick dust sampling device for sampling and measuring the dust content in the air of the operating area and relates to a labor hygiene monitoring instrument. The computer quick dust sampling device is improved into on the basis of a general purpose dust sampling device and the improved main parts are the mounting method of a filtering membrane, the switching over sampling mode and the using of a vortex shedding flowing quantity meter and a computer controlling system. The sampling flowing quantity is expanded to 100 liter / min. The computer quick dust sampling device has the advantages of small size, low noise, light weight, convenient operation and carrying and can be widely used in various fields.
Description
A kind of labour hygiene monitoring instrument is applicable to and measures dust content in the air, the efficiency of dust collection that is specially adapted to measure the dust concentration of production scene and demarcates dust arrester.
General dust sampler is made of power supply, air-breathing power, micromotor, flowmeter, sampling head and control device.The material of Chalk-dust filtering---filter membrane is housed in the sampling head.When sampling, starts measuring point instrument, dust laden air sucks, the dust detention purifies the back air and discharges through flowmeter, the pump housing on filter membrane, regulates needed flow, the record sampling time, can calculate and filter total air between sampling period, again according to the dust on filter membrane weightening finish, just can the unit's of calculating volume of air in dust weight, be the dust concentration value, unit is a milligram/rice
3, its computing formula is:
C＝ (m
2-m
1)/(Qt) ×1000
In the formula: C-dust concentration mg/m
3
m
1-sampling front filter quality mg;
m
2-sampling back filter membrane quality mg;
T-sampling time min;
Q-sampling flow 1/min.
After a point has been measured, unload the anchor clamps in the sampling head, change newly, survey another point again.
Though existing dust sampler has multiple, product is similar substantially, sampling flow is generally 15～40 liters/minute, and in general 10～20 minutes of sampling time, the SR of instrument is all bigger, cause instrument power big, volume weight is also big, and the noise height portably uses inconvenience, for keeping constant rate, need artificial constantly the supervision to regulate in the suspended body flowmeter sampling process that adopts; Each sample all will load and unload, troublesome poeration.Data shows that the L100 type high capacity air sampler of Britain Rotheroe-Mitchell company is though can reach 100 liters/minute of sampling flows, and have a timing sampling device, and but needing monitoring at any time, volume is big, weigh 11.4 kilograms, need external 220 volts of power supplys, carry inconvenience; The various sampling thief that Japan bavin field instruments for scientific research Co., Ltd. makes, flow has only 15～30 liters/minute, and only the pump housing just has 14.7 kilograms, external power supply, the sampling of tripod support fixation; Homemade Wuan-84 type dust sampler, flow can reach 60 liters/minute, has battery feed.Above-mentioned three kinds all is that the filter membrane anchor clamps are installed one by one, has suspended body flowmeter, does not all have computerized control system.
At the problems referred to above, improve the utility model of design, its flow can reach 100 liters/minute; Sampling time foreshortens to 2～3 minutes, and in light weight, and it is very convenient to portably use.
The utility model is for improving design, and its basic composition comprises that employing now uses the basic structure form of instrument, adopts micro-centrifugal fan, and sampling head and power supply are partly; Improving feature partly is: adopt vertical filter membrane anchor clamps and matrix filter membrane to clamp method, multiple clip garden dish and switching device shifter are adopted in the sample sampling; Quote flux of vortex street and take into account electric compulogic system.After the utility model was taked above-mentioned measure, its sampling flow was 100 liters/minute, noise 75dB, 3.8 kilograms of weight accomplish that resistance is little, flow is big, power consumption is few, noise is low, the body volume is little, in light weight, can reach quick, accurate, easy, the efficient purpose of sampling.
Details are as follows for the feature of utility model:
(1) the matrix filter membrane clamps method: according to resistance law, flow increases, resistance becomes a square increase (H=RO
2, H-resistance, Q-flow), it is to reduce instrument power consumption key (N=(HQ)/(102 η), H-resistance, Q-flow, η-efficient) that big traffic sampling is reduced the instrument system resistance, the matrix filter membrane method of clamping has realized this purpose.This method comprises novel vertical anchor clamps and clamping and loading method, vertical anchor clamps are formed (see figure 1) by base, pressure ring and loam cake, and new clamping and loading method is that the chlorinated polyvinyl chloride filter membrane is lain on the clamp base, finds the center, put pressure ring above, around (the seeing Fig. 3 (a)), filter membrane still is that base and pressure ring are folded, depresses with pressing mold then, (seeing Fig. 3 (b)), take away pressing mold after pressing, loam cake is screwed on the base, filter membrane just becomes matrix like this.
(2) multiple clip garden dish and switching device shifter: this apparatus structure is garden, a material all in one piece 10 a hole dish, load onto 10 vertical anchor clamps, with a location knob, whenever adopt a sample rotation once, on the sampling location, connect the dust laden air suction on the anchor clamps and put pipe, connect the power connecting pipe (see figure 4) of bleeding down, utilize the worm and gear arrangement of clutch to handle when (Fig. 5) sampling, rotate the clutch handwheel forward, move on movable the adapter, with the anchor clamps jack-up of holder in dish hole, garden, the anchor clamps upper end is connected with last pipe, the clutch handwheel is suitably exerted oneself, and two pipes clamp at two ends up and down with anchor clamps, and gas circuit communicates, there is the less surface of contact of rubber washer the junction, makes it have good impermeability.When sample switches, the clutch handwheel that rotates backward, following pipe moves down, and anchor clamps fall, and are stuck in the dish hole, garden, and anchor clamps and connecting leg are up and down separated, rotational positioning knob at this moment, next sample forwards on the sampling location.
(3) use vortex shedding flow meter: the utility model is used for dust sampler with vortex shedding flow meter, and its internal diameter that the used low reynolds number vortex shedding flow meter embodiment of this instrument uses is 18 millimeters, and long 90 millimeters, 20～200 liters/minute of the flow ranges of linearity.
(4) adopt the computer automatic control system: main contents comprise that 1. running parameter is set.The project of setting has sampling instantaneous delivery, sampling time, time-delay on time.2. constant current amount sampling under the constantly decline situation of cell voltage and under a certain amount of situation of filter membrane control of dust, keeps sampling flow constant in instrument uses.3. the under-voltage alarm of battery, instrument gave the alarm when cell voltage was lower than ultimate limit state.Computer automatic control system hardware block diagram (see figure 6), main program flow chart (see figure 7), regularly interrupt service routine process flow diagram (see figure 8).
Computer automatic control system operation steps is as follows:
1. four of instrument panel keys are double function key.I.e. startup/Pause key, put number selection/instantaneous delivery display key, put several adding/time showing key and put number and subtract/the integrated flow display key, back triple bond is first function during putting number, be that triple bond is respectively and puts choosing, put (one), put (+), be used for running parameter and set, in sampling process and after the sampling, become second function automatically, be respectively and show in wink, in time, show and tired showing, be used for showing and select, startup/Pause key is pressed to starting for the first time, clicks to suspending again, so repeatedly, open power switch device, the return display shows " F100 ", then can carry out the setting of sampling work parameter, if set, can directly start sampling.
2. the sampling thief running parameter is set: setting item has sampling instantaneous delivery, sampling time and time-delay on time.After instrument connects electricity, the display most significant digit shows that " F " represents that low three of this moment is shown as instantaneous p flow setting value, this moment is by " putting (+) " key or " putting (-) " key, making low three demonstration number is needed instantaneous delivery, maximal value is 100 liters/minute, promptly finish setting this moment to instantaneous delivery, by " putting choosing " key, the display extreme higher position shows " E ", expression low two demonstration numbers this moment are the sampling time setting value, by " putting (+) " or " putting (-) " key, make low two to be shown as the needed sampling time, can be from 0～99 minute, promptly finish setting this moment to the sampling time; Again by " putting choosing " key, the display most significant digit shows " b ", and the deputy demonstration number of expression display is for time-delay on time setting value, by " putting (+) " or " putting (-) " key, make low two to show that number is the needed time-delay on time, can be from 0～99 minute.When so being engaged in the display most significant digit and showing " F ", " E " or " b ", set sampling instantaneous delivery, sampling time and the time-delay on time respectively by " putting choosing " key and " putting (+) " key of " putting (-) ".
3. after Instrument working parameter is set and is finished, by " startup/time-out " key, sampling thief promptly carries out work automatically according to the parameter that sets, if the time-delay on time of setting is zero, sampling immediately after the startup, this moment, the display device showed actual instantaneous sampling flow, in the sampling process and sampling stop after respectively by " tired showing ", " time show " or " wink shows " key, can show at that time integrated flow value (liters), sampling excess time (second) or flow actual time (liter/minute).
The I type of embodiment of the present utility model and II type sampling thief basic mechanical design feature such as following table:
| Main performance | The I type | The II type |
| The sampling flow scope (rise/minute) | 60～100 | 60～100 |
| Sampling time scope (branch) | 1～10 | 1～10 |
| Load resistance (handkerchief) | 2000 | 2000 |
| Filter membrane diameter (millimeter) | 63 | 56 |
| The anchor clamps mounting means | Garden 10 samples of dish switch | Install one by one |
| Once charge the continuous sampling time (branch) | 60 | 60 |
| The power of bleeding | Micro-centrifugal fan | Micro-centrifugal fan |
| Power supply | Ickel- |
Ickel- |
| Noise (decibel) | 75 | 75 |
| Weight (kilogram) | 3.8 | 2.5 |
| Physical dimension (millimeter 3） | 220×220×190 | 170×150×125 |
The utility model is applicable to departments such as metallurgical works, mine, coal, casting, cement, building materials, pottery, electric power, grain processing, uses in the time of can supplying industrial enterprise, environmental protection, labour protection, health and epidemic prevention department and R﹠D institution to carry out conventional sense, supervision and check, environmental surveys, occupational illness research and other research.
Characteristics and good effect
(1) but quick sampling improves dust measuring efficient.
This sampling thief sampling flow is 100 liters/minute, so the sampling time is to get final product in 2 minutes.Shortened the sampling time, reached the quick sampling requirement, its determination efficiency can improve 2.5～10 times.
(2) can portablely sample, save manpower.
This sampling thief matrix large tracts of land filter membrane, vortex shedding flow meter etc. can be controlled automatically, can not only vertically lay and supervise at any time and transfer, and have also created condition for portable sampling.
(3) system controlled by computer, multiple functional, easy and simple to handle.
(4) reduce sampling error, improve and measure accuracy.
Description of drawings:
Fig. 1 is the vertical clamp structure figure of filter membrane, and it is made up of three parts, and promptly base 1, pressure ring 2 and loam cake 3.Loam cake is connected with whorl of base, and pressure ring is with 45
#Electroplate steel processing back, and base and loam cake are with L12 alloy aluminum processing rear surface oxidation processes or use injection moulding.
Fig. 2 is pressing mold part figure in addition, available L12 alloy aluminum processing or injection moulding.
Fig. 3 is that the filter membrane matrix clamps process.(a) being that the first step is tiled in the center that aligns on the base with filter membrane, putting pressure ring again, (b) was second step, depressed filter membrane with pressing mold, made filter membrane become matrix filter membrane periphery and still was pressed in the middle of base and the pressure ring.The 3rd step was to extract pressing mold, and loam cake and base are tightened.
Fig. 4 is quick computer dust sampler structural drawing, and emphasis is multiple clip garden dish and switching device shifter.
Fig. 5 is porous garden dish and switching device shifter figure.Porous garden dish 22 is along 10 holes of periphery, and with 10 vertical anchor clamps (parts 11 among Fig. 4) holder thereon, the positioning knob that the rotation of garden dish 22 is made up of parts 16,21,30～36 etc. is finished.The vertical anchor clamps 11 in right side are the sampling location among Fig. 4, and vertical anchor clamps 11 tops are dust laden air tail pipe 12, and the below is movable adapter 10, and itself and clutch handwheel 9 are the trapezoid thread screw transmission.Rotate clutch handwheel 9 forward, then movably take on 10 and move, join with vertical anchor clamps 11 bottoms, and its upper end is joined with tail pipe 12 vertical anchor clamps 11 jack-up, suitably exert oneself parts 10,12 and two ends clamping about in the of 11 to 9, gas circuit communicates, can sample, the junction is provided with rubber washer and less surface of contact, makes it have good gas.During switch sample, the parts 9 that rotate backward, then parts 10 move down, and anchor clamps 11 fall to being stuck in the dish of garden, and its and parts were opened in 10,12 minutes, rotational positioning knob at this moment, next anchor clamps forward on the sampling location, repeat said process again.
Parts label declaration among the figure:
1-clamp base 2-pressure ring 3-anchor clamps loam cake 4-pressing mold 5-filter membrane 6-control circuit board 7-snake-like hose 8-vortex-shedding meter 9-clutch handwheel 10-movably takes over 11-vertical clamp 12-dust laden air suction line 13-and takes over four light-emitting diode display 19-of 14-horn mouth 15-button 16-knob 17-porous garden dish hold-down nut 18-panel fenestella lid 20-panel 21-rotating shaft 22-porous garden dish 23-shell 24-mini fan 25-micro machine 26-bearing 27-battery 28-footing 29-exhaust outlet 30-and mark closely dish garden, hold-down nut 33-location, garden, bolt 31-rotating shaft hold-down nut 32-location dish 34-locking ball 35-spring
Embodiment:
General instrument plant or instrucment and meter plant can carry out production, produce the instrument product, are used for industrial practice.
Vertical anchor clamps, garden dish switching device shifter is pressed figure paper conversion, and vertical anchor clamps can be used L10～12 alloy aluminum, but also injection moulding.Vortex shedding flow meter is by 20～200 liters/minute of the ranges of linearity, and internal diameter 18mm, long 90mm require outer committee to place orders with enterprises for processing materials; Micro-centrifugal fan is the propulsion system of former Wuan-76 type dust sampler, plastic material; Just the impeller center pit should match with this instrument motor shaft; Micromotor adopts M28-492 type, rated voltage 12V, nominal torque 80gcm, 9000 rev/mins of rated speeds, rated current 1.35A; Accumulator adopts ickel-cadmium cell, and the capacity that power is used is 1 ampere-hour, 0.5 ampere-hour, 4 joints that 14 joints, control circuit are used; Control section hardware is pressed Fig. 6 processing.
Claims (4)
1, a kind of dust sampler that comprises power supply, air intake duct, micromotor, flowmeter, sampling head and control device:
Its feature:
1. the filter membrane anchor clamps are that vertical structure, filter membrane are that matrix clamps;
2. the sample sampling is furnished with the porous garden dish of switching device shifter and corresponding anchor clamps;
3. the vortex shedding flow meter of measurement of discharge is housed;
4. the computerized control system that be furnished with operation, calculates and show.
2, its feature of dust sampler as claimed in claim 1: the filter membrane anchor clamps of vertical structure comprise base, pressure ring and loam cake; The spill of filter membrane clamps with special-purpose convex press mold tool, and filter membrane is pressed in the middle of base and the pressure ring; After taking out press mold, tighten up with loam cake.
3, its feature of dust sampler as claimed in claim 1: the garden dish of being furnished with switching device shifter has 10 holes, every hole to be furnished with corresponding anchor clamps, and anchor clamps top connection dust laden air tail pipe connects the power connecting pipe down, is furnished with the clutch coupling of control change action.
4, dust sampler as claimed in claim 1, its feature: computerized control system; Instantaneous delivery, on time, sampling time, time-delay start, constant current sampling, under-voltage alarm; Sample mode; Vortex shedding flow meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92218147 CN2126420U (en) | 1992-06-19 | 1992-06-19 | Computer quick sampler for dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92218147 CN2126420U (en) | 1992-06-19 | 1992-06-19 | Computer quick sampler for dust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2126420U true CN2126420U (en) | 1992-12-30 |
Family
ID=4961994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92218147 Granted CN2126420U (en) | 1992-06-19 | 1992-06-19 | Computer quick sampler for dust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2126420U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296140C (en) * | 2003-01-16 | 2007-01-24 | 华南师范大学 | Physical sorting method of atmosphere micro dust particles |
| CN104990850A (en) * | 2015-08-10 | 2015-10-21 | 华北电力大学（保定） | Air particulate matter monitoring system |
| CN105572404A (en) * | 2015-12-28 | 2016-05-11 | 常熟市矿山机电器材有限公司 | Fully automatic dust detector |
| CN106514205A (en) * | 2016-12-29 | 2017-03-22 | 青岛崂应环境科技有限公司 | Automatic film pressing device for sampling head |
-
1992
- 1992-06-19 CN CN 92218147 patent/CN2126420U/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296140C (en) * | 2003-01-16 | 2007-01-24 | 华南师范大学 | Physical sorting method of atmosphere micro dust particles |
| CN104990850A (en) * | 2015-08-10 | 2015-10-21 | 华北电力大学（保定） | Air particulate matter monitoring system |
| CN105572404A (en) * | 2015-12-28 | 2016-05-11 | 常熟市矿山机电器材有限公司 | Fully automatic dust detector |
| CN106514205A (en) * | 2016-12-29 | 2017-03-22 | 青岛崂应环境科技有限公司 | Automatic film pressing device for sampling head |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |