CN107238548A - One kind sampling and integral type β ray flue dust quality weighing instruments of weighing - Google Patents

One kind sampling and integral type β ray flue dust quality weighing instruments of weighing Download PDF

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Publication number
CN107238548A
CN107238548A CN201710706572.5A CN201710706572A CN107238548A CN 107238548 A CN107238548 A CN 107238548A CN 201710706572 A CN201710706572 A CN 201710706572A CN 107238548 A CN107238548 A CN 107238548A
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China
Prior art keywords
sampling
weighing
mainframe box
filter membrane
flue dust
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CN201710706572.5A
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Chinese (zh)
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CN107238548B (en
Inventor
于维森
郭亮
贺强强
陈现坤
常庆凯
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Qingdao Junray Intelligent Instrument Co Ltd
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Qingdao Junray Intelligent Instrument Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N5/00Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
    • G01N5/02Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

One kind sampling and weigh integral type β ray flue dust quality weighing instruments, including sampling head and mainframe box, are connected between sampling head and mainframe box by heat traced hoses;It is fixed with the mainframe box on β radiation detection modules and rotatable rotating disk, the rotating disk and is provided with filter membrane clip mounting hole;It is provided with mainframe box and the sampling gas circuit that filter membrane clip mounting hole is formed is compressed by upper and lower closure;Be provided with air inlet triple valve in air inlet pipe, the joint of air inlet triple valve the 3rd connection high efficiency particulate air filter, can by extraneous air after filtering and heating through filter membrane, filter membrane is dried so as to realize.The weighing instrument realizes the connection of sampling head and mainframe box by quick-connect machanism, integrated with weighing by sampling, and equipment is applied to the sampling of a variety of flues.Filter membrane clip is picked and placeed by rotating disk, sample collection, drying unit and weighing device set and be integrated, compact conformation, portability is good.Back-blowing device is carried, sample lines are cleaned, reduce deposited particles thing influences on subsequent sampling, improves sampling precision.

Description

One kind sampling and integral type β ray flue dust quality weighing instruments of weighing
Technical field
The invention belongs to dust concentration monitoring field, more particularly to a kind of sampling and integral type β ray flue dust quality of weighing Weighing instrument.
Background technology
Problem of environmental pollution caused by the pollution sources such as Industrial Boiler, boiler of power plant and Industrial Stoves is very serious, Countries in the world are all had made intensive studies and are controlled by this, and this concentration for being accomplished by the graininess flue dust discharged to it is carried out Monitoring.
Conventional monitoring method has optical transmission method, laser backscatter method, charge method, β attenuation sensors, filtering to claim at present Weight method etc..Wherein, filtering weight method is present the most widely used one kind, and its general principle is the dust constaining of certain volume Gas, after the filter cylinder of known weight, the grit in flue gas is by detention, according to the weight difference of filter cylinder before and after sampling and sampling body Product, calculates dust content.Because the filtering weight method degree of accuracy is high, precision is good, the method is set to standard by external many countries Method, China also regard the method as the standard for identifying other analysis methods.But filtering weight method need to first pass through filter membrane progress Smoke dust sampling, then flue dust filtrate is dried, finally weigh and calculate the testing result of dust concentration, smoke discharge amount.Wherein hold The required usual volume of weighing equipment of weight is larger, and need to be placed in the analysis room of cleaning and operated.Generally sampling ground is with dividing Analysis room is distant, and transportation length easily causes error;Sampling is long to the cycle of test sample, can not meet environmental monitoring stations at different levels Reply is evaluated in time.
The principle of β attenuation sensors is:When the β rays that the β sources of one intensity constant are sent are by medium, β particles are with being situated between The mutual collision loss energy of electronics in matter and absorbed.Under low-energy condition, degree of absorption depends on the quality of medium, with powder Granularity, composition, color and the dispersity of grit etc. are unrelated.β rays successively through cleaning filter paper (not gathering dirt sample) and Dirt sample filter paper (same filter paper) has been adopted, dust concentration in environment is asked for by the difference of uptake according to β rays twice.β is penetrated Line absorption method is not by dust species, granularity, the influence of the factor such as decentralization, shape, color, gloss;It can reduce sample Processing time and contaminated chance, will not bring human error and error free accumulation, it is not necessary to which often calibration and zeroing, is powder Accurate one kind in the indirect measurement method of dust concentration.
Generally separated at present using the weighing instruments of β attenuation sensors with sampling instrument, the filter membrane after sampling need to be transferred to Weighed in weighing instrument, process is complicated, easily brings impurity into.And weighing unit and drying unit are relatively independent, structure is not compact, portable Property is poor.Heating radiation drying mode being used other drying course, drying rate is slow more.Sampling head is by long-term use in its rear pipeline Wall can glue glutinous more or less particulate matter, influence testing result.
The content of the invention
The above-mentioned technical problem that the present invention exists for the weighing instruments of existing use β attenuation sensors, is proposed a kind of Compact conformation, integrates probe tube, dries and weigh, testing result accurately β rays flue dust quality weighing instrument.
In order to achieve the above object, the technical solution adopted by the present invention is:
A kind of integral type β rays flue dust quality weighing instrument, including sampling head and mainframe box, pass through companion between sampling head and mainframe box Hot flexible pipe connection;It is fixed with the mainframe box on β radiation detection modules and rotatable rotating disk, the rotating disk and is provided with filter membrane Press from both sides mounting hole;Top cover labyrinth and lower sealing cover are additionally provided with the mainframe box, top cover labyrinth is connected to sampling by air inlet pipe Flue dust pipe in head, lower sealing cover is connected to outside casing by escape pipe, and upper and lower closure is formed when compressing filter membrane clip mounting hole Sampling gas circuit;Air inlet triple valve is provided with the air inlet pipe, the joint of air inlet triple valve the 3rd connects efficient high efficiency particulate air filter, turns Filter membrane in disk rotational installation hole can be between upper and lower closure, at β radiation detection modules.
Preferably, outlet triple valve is provided with the escape pipe, the joint of outlet triple valve the 3rd connection back blowing machine.
Preferably, being coated with heat tape on the air inlet pipe and upper and lower closure.
Preferably, being connected with eccentric wheel in lower sealing cover, it is provided with compression spring between mainframe box, and eccentric wheel exists Eccentric wheel motor drives backspin to turn to drive lower sealing cover lifting.
Preferably, mainframe box side wall is provided with and picks and places mouth, one of filter membrane clip mounting hole is stretched during turntable rotation Go out and pick and place mouth, described pick and place is provided with retractable baffle door on mouth.
Preferably, being provided with slide rail and switch door motor on the mainframe box, baffle door is arranged on slide rail by sliding block On, motor shaft connecting crank, crank other end articulated linkage, rod hinge connection sliding block realizes the motor switch of baffle door.
Preferably, being provided with three filter membrane clip mounting holes on the rotating disk.
Preferably, being provided with upturning lid on the mainframe box, upturning lid bottom surface is provided with display screen, mainframe box and also set It is equipped with control button and input keyboard.
Preferably, being provided with single-chip microcomputer in the mainframe box, the input of single-chip microcomputer connects β radiation detection modules, adopted Sample head and input keyboard;Output end connection back blowing machine, switch door motor and display screen.
Compared with prior art, advantages and positive effects of the present invention are:
1st, integral type β rays flue dust quality weighing instrument, realizes that the heat tracing of sampling head and mainframe box is soft by quick-connect machanism Pipe is connected, integrated with weighing by sampling, and equipment is applied to the sampling of a variety of flues.
2nd, filter membrane clip is picked and placeed by rotating disk, sample collection, drying unit and weighing device integration, compact conformation, just The property taken is good.
3rd, filter membrane drying is by the way of heating and air-drying while carrying out, and drying efficiency is high.
4th, back-blowing device is carried, sample lines are cleaned, sampling precision is improved.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of weighing instrument of the present invention;
Fig. 2 is the control planning schematic diagram of weighing instrument of the present invention;
Fig. 3 is the quick-connect machanism schematic diagram of weighing instrument of the present invention;
Fig. 4 is the rotating disk and station schematic diagram of weighing instrument of the present invention;
Fig. 5 is the rotating disk and station schematic diagram of weighing instrument of the present invention;
Fig. 6 is the baffle door electric folding structural representation of weighing instrument of the present invention;
Fig. 7 is the turntable structure schematic diagram of weighing instrument of the present invention;
Above in each figure:1st, sampling head;11st, fume tube;111st, four fluorine tube;12nd, Pitot tube;13rd, cigarette temperature spool;14th, protection pipe; 15th, heat traced hoses;151st, heat traced hoses joint;2nd, mainframe box;21st, upturning lid;22nd, display screen;23rd, keyboard is inputted;24th, pick and place Mouthful;25th, case is picked and placeed;251st, baffle door;252nd, slide rail;253rd, sliding block;254th, crank;255th, connecting rod;256th, limit switch;26、 Metal joint;27th, tetrafluoro pipe joint;271st, silica gel liner;272nd, thread bush;28th, casing joint;3rd, weighing unit is gathered;31、 Support;311st, optoelectronic switch;32nd, rotary tray motor;33rd, rotating disk;331st, mounting hole;332nd, catch;34th, top cover labyrinth;35th, it is close under Capping;36th, air inlet pipe;361st, air inlet triple valve;37th, escape pipe;371st, outlet triple valve;38th, heat tape;4th, high efficiency filter Device;5th, back blowing machine;6th, β radiation detection modules;61st, β ray irradiations source;62nd, β-ray detector;7th, fast lifting mechanism; 71st, connecting plate;72nd, eccentric wheel;73rd, compression spring;8th, single-chip microcomputer;A, pick and place station;B, sampling drying station;C, weighing work Position.
Embodiment
In order to be better understood from the present invention, illustrate with reference to the accompanying drawings and examples.
Embodiment:As shown in Figure 1 and Figure 2, a kind of sampling and integral type β ray flue dust quality weighing instruments of weighing, including sampling It is provided with head and mainframe box, mainframe box for gathering flue gas sample, drying sample and the collection weighing unit weighed.The flue dust Quality weighing instrument uses beta-ray measurement method, by flue gas particles probe tube, drying unit and weighing device in one, drying speed Degree is fast, compact equipment, and can be used cooperatively with existing smoke dust sampling instrument, quick detection dust concentration.
The sampling head includes fume tube, standard pitot tube and cigarette temperature spool, is respectively used to collection smoke particle thing, detection Gas flow and detection gas temperature, Pitot tube are connected to mainframe box by two silicone tubes, and fume tube is protected by band external heat The four fluorine tube of temperature function(Inwall is coated with the pipeline of polytetrafluoroethylene (PTFE))Be connected to collection weighing unit air inlet pipe, silicone tube and Four fluorine tube is arranged in protection metal pipe, is connected between protection pipe end and mainframe box by heat traced hoses.The design is effective Solve existing flue gas particles analyzer sampling head and mainframe box be rigidly connected the sampling restricted problem brought, due to needing The flue height of detection is different, its direction have vertically, the type such as level and inclination, be rigidly connected and limit the length of sampling head Degree, due to the limitation of mainframe box when it is sampled, it is difficult to accomplish vertical sampling., it is necessary to which sampling head is dismantled during other equipment conveying Get off, otherwise take up space too big, it is difficult to transport, and use heat traced hoses connection, then foldable disk puts also removable unload down.Such as Shown in Fig. 3, to realize the quick connection of heat traced hoses and mainframe box, quick-connect machanism is provided with, is transported and using all convenient. Two piece metal joints of the quick-connect machanism including being arranged on cabinet exterior, two silicone tubes for inserting Pitot tube, Silicone tube softness can be directly sleeved on metal joint, firmly installed and salable.Four fluorine tube is harder, it is difficult to be directly sleeved on metal On joint.Therefore cabinet exterior sets inwall to stick the tetrafluoro pipe joint for having silica gel liner, and four fluorine tube inner nosepiece wall sets interior spiral shell Twist-on holds out against the thread bush of silica gel liner on line, internal thread, inserts four fluorine tube in tetrafluoro pipe joint during installation, silica gel liner is tight Close parcel four fluorine tube, realizes sealing.Metal joint and tetrafluoro pipe joint, which are arranged at, to be set in threaded casing joint, and heat tracing is soft Pipe end is provided with heat traced hoses joint of the twist-on on casing joint.
It is provided with the mainframe box and receives the detecting elements such as sensor, optoelectronic switch and control what electric device was run STM32 series monolithics(Such as STM32F103VCT6).Be provided with upturning lid on the mainframe box, upturning lid bottom surface be provided with Control button and input keyboard are additionally provided with the display screen of monolithic mechatronics, mainframe box, for input instruction.
The collection weighing unit includes being provided with rotary tray motor on the support being arranged in mainframe box, support, rotating disk electricity Fan-shaped turntable is installed on owner's axle.Rotary tray motor uses servomotor, can drive and be provided with one on turntable rotation, the rotating disk The individual mounting hole for placing filter membrane clip.The position of filter membrane corresponds to three stations in turntable rotation, mounting hole, respectively picks and places station A, sampling drying station B and weighing station C, reference picture 4.
A mouth that picks and places for being used to pick and place filter membrane clip is provided with the side wall of the mainframe box side, that is, picks and places station.Rotating disk Rotation is supreme when picking and placeing station, and the filter membrane clip in mounting hole is stretched out outside mainframe box from mouth is picked and placeed.To protect the filter membrane clip not by outer Boundary pollutes, and is provided with mainframe box and picks and places case, covered on and pick and place at mouth.As shown in figure 5, for ease of picking and placeing, picking and placeing and being provided with case The baffle door of motor switch is realized using brace and connecting rod framework.Slide rail is installed, baffle door is installed by sliding block on the support On slide rail.Switch door motor is installed, motor shaft connecting crank, crank other end articulated linkage, rod hinge connection is slided on support Block, switch door motor is connected with single-chip microcomputer output mouthful, is connected 2 structures by motor and crank, is realized switch gate along slide rail or so Slide, so as to open or close.The limit switch for limiting the baffle door position of the switch is additionally provided with the support, is respectively arranged at The both sides of baffle door.The input port connection of limit switch and single-chip microcomputer, when baffle door reaches maximum, triggers limit switch, Door motor stalling is switched, at closing time similarly.It can certainly be rotated by motor driven gear, be driven with gear and be arranged on baffle plate Rack structure on door realizes the switch of baffle door.
Top cover labyrinth and lower sealing cover are provided with the sampling drying station, top cover labyrinth is connected to by air inlet pipe and adopted Flue dust pipe in sample head, lower sealing cover is connected to by escape pipe at the external tapping on casing, and upper and lower closure compresses filter membrane clip Sampling gas circuit is formed during mounting hole.External tapping can be connected with the sampling pump of other sample devices and use, and obtain pumping power.Due to Contain vapor in flue gas, to prevent flue gas is cooled through heat traced hoses into vapor after mainframe box to be condensed into drips detection As a result, it is coated with heat tape in top cover labyrinth and the air inlet pipe being attached thereto.
It is also associated with air inlet triple valve in the air inlet pipe, air inlet triple valve is in addition to two joints of connection air inlet pipe, the Three joints connect high efficiency particulate air filter by drying tracheae, and air inlet triple valve selects the magnetic valve that is connected with single-chip microcomputer, when open to During high efficiency particulate air filter gas circuit, there is clean gas to blow over filter membrane clip, the filter membrane on filter membrane clip is dried up.To accelerate drying rate, institute State and be coated with heat tape on drying tracheae.The clean gas filtered through high efficiency particulate air filter is heated after entering gas circuit, hot gas stream Through filter membrane, the particulate matter on flash baking filter membrane, and moisture is taken away.Relative to existing radiant heating, its drying rate adds It hurry up, good drying effect.
β radiation detection modules are provided with the weighing station, it includes β ray irradiations source and β-ray detector, β is penetrated Line source is rack-mount by radioactive source fixed seat, above rotating disk;β-ray detector is rack-mount to be located at Below rotating disk, β ray irradiations source divergent-ray is received, β-ray detector through the filter membrane in mounting hole through β-ray detector Output port connect the input port of single-chip microcomputer, detection signal is transferred to single-chip microcomputer, single-chip microcomputer by blank filter membrane numerical value with Sample filter membrane numerical value comparing calculation draws particulate matter quality information.
When rotating disk is rotated, lower sealing cover need to be declined certain distance, be to be connected in this lower sealing cover in order to which rotating disk is rotated There is fast lifting mechanism.As shown in fig. 6, fast lifting mechanism includes the connecting plate of connection lower sealing cover bottom, connecting plate upper table Face is against there is eccentric wheel, and the lower compression spring that is provided between capping and mainframe box is upward by lower sealing cover, makes itself and rotating disk It is in close contact, obtains sealing gas circuit.Eccentric wheel drives backspin to turn in eccentric wheel motor, eccentric wheel wheel face extruding lower sealing cover, band Dynamic lower sealing cover lifting.
It is to aid in turntable rotation to corresponding station, accurate positioning, the rotating disk bottom is provided with catch, each station and set Optoelectronic switch is equipped with, the output end of optoelectronic switch is connected to the input of single-chip microcomputer, when optoelectronic switch is blocked, rotary tray motor stops Only.
Because sampling head and sampling bypass line are longer, some particulate matters are sticked in the meeting of pipeline inner wall more or less, again It can be collected during detection by filter membrane, influence testing result.To avoid being connected with outlet triple valve on case above, the escape pipe, The joint of outlet triple valve the 3rd connects back blowing machine.Air-flow is blown into air inlet pipe by escape pipe after back blowing machine starts, by sampling The fume tube blowout of head, the particulate matter in pipeline is discharged, it is ensured that testing result is accurate.
The use process of above-mentioned weighing instrument is as follows,
1st, upturning lid, starting device are opened.Slide damper door, filter membrane clip is put into the mounting hole picked and placeed at station.
2nd, baffle door is closed, rotary tray motor drives rotating disk to turn an angle and is directed at stopping after drying station, eccentric wheel electricity Machine, which is rotated, makes eccentric wheel promote drying lower cover to realize drying branch road sealing;Air inlet triple valve closes sampling gas circuit, connects drying gas Road, outlet triple valve opens sampler gas circuit, closes blowback gas circuit, and external sampling pump pumping utilizes the heat from drying gas circuit The dry filter membrane of wind.
3rd, after filter membrane drying, lower sealing cover, which declines, unclamps filter membrane clip, and rotary tray motor drives rotating disk to rotate, and filter membrane clip, which enters, to be claimed Station is measured, carries out weighing blank filter membrane using β rays, weighing result is transmitted to single-chip microcomputer.
4th, weigh and finish, rotary tray motor drives rotating disk to rotate, filter membrane clip enters sampling station.Fast lifting mechanism is close under making Capping rises sealing sampling branch road, and air inlet triple valve connects sampling gas circuit, and sampling pump pumping is sampled.
5th, collection is finished, and fast lifting mechanism unclamps filter membrane clip, and rotary tray motor drives rotating disk to rotate, and filter membrane clip, which enters, to be air-dried Station, hot blast drying filter membrane.
6th, after filter membrane is air-dried, filter membrane clip is unclamped, rotary tray motor drives rotating disk to rotate, filter membrane clip, which enters, weighs station, utilizes β Ray carries out weighing filter membrane.Single-chip microcomputer is by the blank filter membrane mass ratio that is measured with step 3 compared with flue dust weight being measured, in display Screen display.Also the suction gas volume that Pitot tube metering can be combined is calculated, and converses dust concentration.
7th, click on and terminate this sampling, rotary tray motor drives rotating disk to rotate, filter membrane clip picks and places door at station and opened, and takes out filter membrane Folder, completion is once sampled.The filter membrane clip of taking-up can take back analysis room and calibrate contrasting detection result using weight method.
8th, after the completion of sampling, blowback is clicked on, lower sealing cover compresses filter membrane clip sealing gas circuit, and outlet triple valve is opened to back-blowing Machine and sampling gas circuit, blower fan start, and blowback pipeline is cleaned.
Above procedure is that rotating disk only sets a filter membrane clip mounting hole, and filter membrane is picked and placeed, sampling drying and is weighed and need to be completed one by one. Also rotating disk can be provided in round, three filter membrane clip mounting holes is set, three mounting holes are distributed on disk peripheral(Such as Fig. 7 institutes Show), three mounting holes are located at respectively to be picked and placeed at station, sampling drying station and weighing station, can now pass through single-chip microcomputer control Realize that filter membrane clip is picked and placeed, samples or dried to carry out simultaneously with weighing, accelerate operating efficiency.
Integral type β ray flue dust quality weighing instruments described in the present embodiment, by quick-connect machanism realize sampling head with The heat traced hoses connection of mainframe box, it is integrated with weighing by sampling, equipment is applied to the sampling of a variety of flues.Will by rotating disk Filter membrane clip is picked and placeed, sample collection, drying unit and weighing device integration, compact conformation, portability is good.Wherein filter membrane drying is adopted It is high with air-drying the mode carried out, drying efficiency simultaneously with heating.Back-blowing device is carried, sample lines are cleaned, sampling precision is improved. The weighing instrument can be connected with the monitoring existing particle analyte detection main frame of unit and use, without buying sampling pump and concentration analysis again Unit is that device upgrade can be achieved.
The above described is only a preferred embodiment of the present invention, being not the limitation for making other forms to the present invention, appoint What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc. Imitate embodiment and be applied to other fields, but every without departing from technical solution of the present invention content, the technical spirit according to the present invention Any simple modification, equivalent variations and the remodeling made to above example, still fall within the protection domain of technical solution of the present invention.

Claims (10)

1. one kind sampling and weigh integral type β ray flue dust quality weighing instruments, including sampling head and mainframe box, it is characterised in that: Connected between sampling head and mainframe box by heat traced hoses;β radiation detection modules are fixed with the mainframe box and rotatable Filter membrane clip mounting hole is provided with rotating disk, the rotating disk;Top cover labyrinth and lower sealing cover are additionally provided with the mainframe box, it is upper close Capping is connected to the flue dust pipe in sampling head by air inlet pipe, and lower sealing cover is connected to outside casing by escape pipe, upper and lower sealing Lid forms sampling gas circuit when compressing filter membrane clip mounting hole;Air inlet triple valve, air inlet triple valve the 3rd are provided with the air inlet pipe The filter membrane that joint is connected in high efficiency particulate air filter, rotating disk rotational installation hole can be between upper and lower closure, β radiation detection modules Place.
2. sampling according to claim 1 and integral type β ray flue dust quality weighing instruments of weighing, it is characterised in that:It is described Outlet triple valve, the joint of outlet triple valve the 3rd connection back blowing machine are provided with escape pipe.
3. sampling according to claim 1 and integral type β ray flue dust quality weighing instruments of weighing, it is characterised in that:It is described Sampling head includes flue dust pipe, Pitot tube and cigarette temperature spool.
4. sampling according to claim 1 and integral type β ray flue dust quality weighing instruments of weighing, it is characterised in that:It is described Heat tape is coated with air inlet pipe and upper and lower closure.
5. sampling according to claim 1 and integral type β ray flue dust quality weighing instruments of weighing, it is characterised in that:Under it is close Eccentric wheel is connected with capping, it is provided with compression spring between mainframe box, eccentric wheel drives backspin to turn in eccentric wheel motor Drive lower sealing cover lifting.
6. sampling according to claim 1 and integral type β ray flue dust quality weighing instruments of weighing, it is characterised in that:It is described Mainframe box side wall, which is provided with, picks and places mouth, and one of filter membrane clip mounting hole, which stretches out, during turntable rotation picks and places mouth, described to pick and place on mouth It is provided with retractable baffle door.
7. sampling according to claim 6 and integral type β ray flue dust quality weighing instruments of weighing, it is characterised in that:It is described Slide rail and switch door motor are installed, baffle door is arranged on slide rail by sliding block, motor shaft connecting crank, crank on mainframe box Other end articulated linkage, rod hinge connection sliding block realizes the motor switch of baffle door.
8. sampling and integral type β ray flue dust quality weighing instruments of weighing according to claim any one of 2-7, its feature exist In:Three filter membrane clip mounting holes are provided with the rotating disk.
9. sampling and integral type β ray flue dust quality weighing instruments of weighing according to any one of claim 8, its feature exist In:Be provided with upturning lid on the mainframe box, upturning lid bottom surface be provided with display screen, mainframe box be additionally provided with control button and Input keyboard.
10. sampling β rays dust concentration direct-reading measurement device integrated with weighing according to claim 9, its feature exists In:Single-chip microcomputer, input connection β radiation detection modules, sampling head and the input keyboard of single-chip microcomputer are installed in the mainframe box; Output end connection back blowing machine, switch door motor and display screen.
CN201710706572.5A 2017-08-17 2017-08-17 Sampling and weighing integrated beta-ray smoke mass weighing instrument Active CN107238548B (en)

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Publication number Priority date Publication date Assignee Title
CN108469361A (en) * 2018-07-03 2018-08-31 青岛明华电子仪器有限公司 A kind of detachable type integration beta rays flue dust direct reading test probe
CN113252595A (en) * 2021-05-19 2021-08-13 广州特种承压设备检测研究院 Boiler efficiency environmental protection synthesizes intelligent detector
CN114018658A (en) * 2021-11-09 2022-02-08 中国人民解放军总医院第五医学中心 Air sample collector for regional infectious disease investigation equipment

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CN108469361B (en) * 2018-07-03 2024-03-19 青岛明华电子仪器有限公司 Detachable integrated beta ray smoke dust direct-reading test probe
CN113252595A (en) * 2021-05-19 2021-08-13 广州特种承压设备检测研究院 Boiler efficiency environmental protection synthesizes intelligent detector
CN114018658A (en) * 2021-11-09 2022-02-08 中国人民解放军总医院第五医学中心 Air sample collector for regional infectious disease investigation equipment

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