CN207463749U - A kind of unperturbed back-blowing device - Google Patents
A kind of unperturbed back-blowing device Download PDFInfo
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- CN207463749U CN207463749U CN201721294410.7U CN201721294410U CN207463749U CN 207463749 U CN207463749 U CN 207463749U CN 201721294410 U CN201721294410 U CN 201721294410U CN 207463749 U CN207463749 U CN 207463749U
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- blowing device
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Abstract
A kind of unperturbed back-blowing device belongs to gas composition monitoring technical field more particularly to a kind of unperturbed back-blowing device.The utility model provides a kind of successional unperturbed back-blowing device for ensureing instrument measurement.The utility model includes air cavity, its structural feature air cavity upper center is provided with mixing chamber exhaust non-return flap, air cavity upper end is provided with the probe purging check nozzle that middle part is dried upward around mixing chamber exhaust non-return flap, air cavity lower end centre exit is provided with aspiration pump, air cavity lower end inner wall is provided with air bladder around air cavity lower end centre exit, air bladder periphery is connected with air cavity wall, it is compressed air cell between air bladder and air cavity lower end inner wall, it is sample air cavity between air bladder and air cavity upper end inner wall, compressed air cell is connected with compressed air intake and exhaust equipment.
Description
Technical field
The utility model belongs to gas composition monitoring technical field more particularly to a kind of unperturbed back-blowing device.
Background technology
Development and social progress with economic technology, people to environmental quality especially air quality requirements increasingly
Height, the production process at the same time producing the substances such as the energy, steel generate a large amount of pernicious gases, the two opposition contradiction again.In this way
Us is required to seek the equalization point of environmental quality and material requisite, and the measurement of pernicious gas just becomes important the one of balance
Ring.In addition, the gas componant measured in other production and living such as oxygen, carbon monoxide, ammonia etc. are also equal to gas pollutant
It measures.
For existing gas monitoring system sampler mostly because gas pipeline sectional area is big, pipeline straight section is short, single-point sampling etc.
Factor can not find representative sample point so that detected sample gas gas content generates larger inclined with overall gas content
Difference.In addition, because sampling bye-pass, probe filter core being caused to be frequently occluded containing a large amount of solid impurities in tested gas, existing blowback is blocked up
Plug thing method is mostly that compressed air blowback or physics dredging, blowback process can not carry out gas and continuously monitor, affecting parameters monitoring
And Industry restructuring.
Invention content
The utility model provides a kind of successional unperturbed blowback dress for ensureing instrument measurement aiming at the above problem
It puts.
To achieve the above object, the utility model adopts the following technical solution, and the utility model includes air cavity, and structure will
Point air cavity upper center is provided with mixing chamber exhaust non-return flap, and air cavity upper end is provided with upward around mixing chamber exhaust non-return flap
The probe purging check nozzle of middle part blowing, air cavity lower end centre exit are provided with aspiration pump, and air cavity lower end inner wall surrounds air cavity
Lower end centre exit is provided with air bladder, and air bladder periphery is connected with air cavity wall, air bladder and air cavity lower end inner wall it
Between for compressed air cell, be sample air cavity between air bladder and air cavity upper end inner wall, compressed air cell and compressed air intake and exhaust
Equipment is connected.
Upper end is connect with spring tray in the middle part of air bladder, and spring tray intermediate openings connect with air cavity lower end centre exit
It is logical, it is provided with air-breathing spring between spring tray and air cavity upper end inner wall.
As a preferred embodiment, one hollow air discharge axis lower end of the utility model sequentially pass through spring tray intermediate openings,
Air cavity lower end centre exit is connected with pumping pump inlet, and hollow air discharge axis upper end is exposed spring tray intermediate openings and is provided with
Platen is sealed, upper sealing platen lower face is mutually squeezed with upper surface in the middle part of spring tray, the hollow air discharge axis of compressed air intracavitary
Outside is provided with lower sealing platen, and lower sealing platen upper surface is mutually squeezed with lower face in the middle part of air bladder；It is lower sealing platen with
Upper sealing platen is fastenedly connected, and hollow air discharge axis upper end, spring tray, air bladder middle part is made to link together.
As another preferred embodiment, hollow air discharge axis lower end described in the utility model is by being vented telescoping tube and aspiration pump
Import is connected.
As another preferred embodiment, hollow air discharge axis described in the utility model in the middle part of sealing ring and air cavity lower end by going out
Mouth is connected.
As another preferred embodiment, air-breathing spring described in the utility model is four, around spring tray intermediate openings
It is uniformly distributed.
As another preferred embodiment, compressed air intake and exhaust equipment described in the utility model includes connecting with compressed air cell
Logical air inlet-outlet pipe, air inlet-outlet pipe outer end are connected with purging triple valve first end, and purging triple valve second end is empty with compression respectively
Air source is connected with compressed air reservoir, and purging triple valve third end is exhaust outlet；Purge the control signal input of triple valve
Mouth is connected with the control signal output mouth of controller.
As another preferred embodiment, sample air cavity air bleeding valve, sample gas are provided on hollow air discharge axis described in the utility model
The control signal input mouth of chamber air bleeding valve is connected with the control signal output mouth of controller.
As another preferred embodiment, limiting feedback board is provided on hollow air discharge axis described in the utility model, is corresponded to
Limiting feedback board is provided with purging limit switch and lower sampling limit switch, the detection signal output end of upper purging limit switch
Mouth, the lower detection signal output port for sampling limit switch are connected respectively with the detection signal input port of controller.
As another preferred embodiment, probe purging check upper end of nozzle axis described in the utility model, which connects, to be turned over top outward
The non-return flap risen.
As another preferred embodiment, air cavity described in the utility model includes the upper air cavity housing and lower air chamber of make-up connection
Housing, upper air cavity housing and lower air chamber housing to buckle by upper and lower flanged joint, air bladder periphery be clipped in lower flange it
Between.
As another preferred embodiment, the utility model further includes multiple spot spiral-flow type gas sampling device, multiple spot spiral-flow type
Gas sampling device includes eddy flow mixing chamber and multiple sampling branch pipes, and each branch pipe sample point that samples is in the radially uniform arrangement of flue；
Sampling branch pipe is connected with eddy flow mixing chamber, and sampling branch outlet direction is uniformly arranged in eddy flow mixing chamber by same clockwise
Row；Analysis meter probe or sampling probe installation interface are provided with above eddy flow mixing chamber；Eddy flow mixing chamber is arranged on the gas
Chamber upper center, eddy flow mixing chamber lower end is vented non-return flap by the mixing chamber and probe purging check nozzle connects with air cavity
It is logical.
As another preferred embodiment, each sampling branch pipe sample point of the utility model in the radially uniform arrangement of pipeline,
Reach multi-point grid method sampling request；Before putting into operation, every sampling branch pipe sample throughput is adjusted into, makes every sampling branch pipe sample gas
Flow is identical；Sampling branch pipe is connected with eddy flow mixing chamber, and evenly distributed by same clockwise in eddy flow mixing chamber so that
Formation eddy flow is sufficiently mixed after gas enters mixing chamber；The aspiration pump makes flue gas be flowed in air cavity, and drives eddy flow
Flow of flue gas in mixing chamber and each sampling branch pipe.
As another preferred embodiment, the number of sampling branch pipe described in the utility model is four.
As another preferred embodiment, eddy flow mixing chamber described in the utility model is cylinder.
As another preferred embodiment, sampling branch pipe described in the utility model includes top branch pipe and stretches into inside flue
Sampling probe, sampling probe lower end are step structure, and sampling probe top is connect with walling of flue by tuning connector, sampling probe
Upper end is connected by dismantled and assembled connector with top branch pipe lower end.
As another preferred embodiment, tuning connector described in the utility model includes connector, connector lower end and flue
Wall welds, and sampling probe passes through connector middle through-hole, and connector upper end outer wall is provided with external screw thread, and connector upper end inner wall is
Inclined opening structure, a round table-like cutting ferrule lower end are sandwiched in angle and are placed on the outside of sampling probe, connector upper end be rotary with it is described outer
The matched nut of screw thread, nut upper end inner wall are mutually squeezed with cutting ferrule upper surface.
As another preferred embodiment, dismantled and assembled connector described in the utility model includes hollow joint body, sampling probe
Upper end is inserted in fittings body lower part, and top branch pipe lower end is inserted in fittings body top, and fittings body top and bottom outer wall is respectively provided with
Have external screw thread and with the matched nut of external screw thread, fittings body top and bottom outer wall is inclined opening structure, a round table-like cutting ferrule
Lower end is sandwiched in angle, and the cutting ferrule of fittings body upper end is placed on the outside of the branch pipe of top, and the cutting ferrule of fittings body lower end is placed on sampling probe
Outside；The nut upper end inner wall of fittings body upper end is mutually squeezed with the cutting ferrule upper surface of fittings body upper end, the nut of fittings body lower end
Lower end inner wall and the cutting ferrule lower face of fittings body lower end mutually squeeze.
As another preferred embodiment, direction of the utility model by adjusting step in flue gas stream makes to enter each
The sample throughput for sampling branch pipe is identical.
As another preferred embodiment, sampling branch pipe described in the utility model is inverted L-shaped pipe；Sample branch pipe upper end transverse tube with
Eddy flow mixing chamber sidewall weld is connected with anchor ear connector.
As another preferred embodiment, analysis meter described in the utility model uses the analysis meter for having self-suction function,
Sampling branch outlet is arranged on analysis meter probe lower section.
As another preferred embodiment, the analysis meter described in the utility model for having self-suction function is using snow enlightening dragon SCS-
900C type analysis instrument.
As another preferred embodiment, analysis meter described in the utility model is using the analyzer for not having self-suction function
Table, sampling branch outlet are arranged on analysis meter probe middle and upper part.
As another preferred embodiment, the analysis meter described in the utility model for not having self-suction function uses AMETEK
210 type oxygen analysers.
As another preferred embodiment, the utility model further includes detection sampling branch pipe temperature sensor, detects in flue
Temperature sensor, the detection signal input port detection signal output with detection sampling branch pipe temperature sensor respectively of controller
The detection signal output port of temperature sensor is connected in port, detection flue.
As another preferred embodiment, detection sampling branch pipe temperature sensor described in the utility model is arranged on sampling branch pipe
With in two meters of sampling branch pipe outer wall above flue junction.
As another preferred embodiment, the sampling branch pipe outer wall between eddy flow mixing chamber and flue described in the utility model is removed
Isothermal holding is done at detection sampling branch pipe temperature sensor setting.
As another preferred embodiment, each sampling branch pipe temperature of controller detection described in the utility model, if a certain sampling
When branch pipe temperature and other sampling branch pipe temperature or flue temperature deviation exceed setting value, controller sends out the sampling branch blockage
Signal.
As another preferred embodiment, sample air cavity volume described in the utility model is more than eddy flow mixing chamber and each sampling branch pipe
The sum of road volume.
Secondly, sampling branch pipe solenoid valve, sampling branch pipe electricity are provided on the transverse tube of sampling branch pipe upper end described in the utility model
The control signal input mouth of magnet valve is connected with the control signal output mouth of controller.
In addition, the depth that sampling branch pipe described in the utility model is stretched into inside flue is different.
The utility model advantageous effect.
When the utility model blowback starts, air cavity volume contraction squeezes sample gas and enters eddy flow mixing chamber to meter probe filter core
And each sampling branch pipe is purged.At the end of blowback, air cavity volume expansion generates negative pressure through each sampling branch pipe and eddy flow mixing chamber
Suck air cavity.
When the utility model is used, aspiration pump is connected with flue, and aspiration pump air-breathing makes flue gas be flowed in unperturbed back-blowing device
It is dynamic, and through being vented non-return flap, eddy flow mixing chamber and sampling flow of flue gas in branch pipe.Flue can be positioned on by flange by being evacuated pump discharge
Outer wall, flue gas are flow back in flue.Purging is sample gas with gas, and rapid into energy after eddy flow mixing chamber and sampling bye-pass in sample air-blowing
New sample aspiration is returned, it is ensured that the continuity of instrument measurement.
The utility model is discharged with expansion using the compression of air cavity, sucks back sample gas, is popped one's head in and pipeline purges, reached and blow
The inswept continuous unperturbed of journey measures.
The dispersible air-breathing spring of the utility model spring tray is to the local pressure of air bladder.
Description of the drawings
The utility model is described further with reference to the accompanying drawings and detailed description.Scope of protection of the utility model
It is not only limited to the statement of the following contents.
Fig. 1 is the utility model structure diagram.
Fig. 2 is the utility model eddy flow mixing chamber vertical view.
Fig. 3 is the utility model probe purging check nozzle arrangements schematic diagram.
Fig. 4 is the utility model tuning joint structure schematic diagram.
Fig. 5 is the dismantled and assembled connector structure diagram of the utility model.
In figure, 1, sampling branch pipe solenoid valve；2nd, branch outlet is sampled；3rd, measuring instrumentss filter probe device；4th, eddy flow mixes
Room；5th, branch pipe is sampled；6th, compressed air reservoir；7th, threeway valve exhaust is purged；8th, probe purging check nozzle；9th, sample air cavity；
10th, upper lower air chamber housing；11st, air-breathing spring；12nd, it is vented non-return flap；13rd, branch pipe temperature is sampled；14th, upper sealing platen；15th, gas
Dynamic film；16th, upper and lower cavity wall and air bladder connecting flange bolt；17th, triple valve is purged；18th, air inlet-outlet pipe；19th, middle idle discharge
Gas axis；20th, spring tray；21st, compressed air cell；22nd, compressed air source；23rd, sealing ring；24th, sample air cavity air bleeding valve；25th, it controls
Device processed；26th, it is vented telescoping tube；27th, dismantled and assembled connector；28th, tuning connector；29th, aspiration pump；30th, flue；31st, exhaust pipe；
32nd, flue temperature；33rd, step structure；34th, upper purging limit switch；35th, lower sampling limit switch；36th, feedback board is limited；37、
Probe purging check nozzle off status；38th, probe purging check nozzle open state；39th, nut；40th, sampling probe；41st, cutting ferrule；
42nd, connector；43rd, top branch pipe；44th, fittings body.
Specific embodiment
As shown in the figure, the utility model includes air cavity, air cavity upper center is provided with mixing chamber exhaust non-return flap 12, air cavity
Upper end is provided with the probe purging check nozzle 8 that middle part is dried upward around mixing chamber exhaust non-return flap 12, in air cavity lower end
Portion outlet is provided with aspiration pump 29, and air cavity lower end inner wall is provided with air bladder 15 around air cavity lower end centre exit, pneumatic thin
15 periphery of film is connected with air cavity wall, for compressed air cell 21 between air bladder 15 and air cavity lower end inner wall, air bladder 15 with
It is sample air cavity 9 between the inner wall of air cavity upper end, compressed air cell 21 is connected with compressed air intake and exhaust equipment.
15 middle part upper end of air bladder is connect with spring tray 20, is gone out in the middle part of 20 intermediate openings of spring tray and air cavity lower end
Mouth connection, air-breathing spring 11 is provided between spring tray 20 and air cavity upper end inner wall.
One hollow air discharge axis lower end of the utility model sequentially passes through 20 intermediate openings of spring tray, air cavity lower end centre exit
It is connected with 29 import of aspiration pump, 19 upper end of hollow air discharge axis exposes 20 intermediate openings of spring tray and is provided with sealing platen
14, upper sealing 14 lower face of platen is mutually squeezed with 20 middle part upper surface of spring tray, the hollow air discharge axis in compressed air cell 21
19 outsides are provided with lower sealing platen, and lower sealing platen upper surface is mutually squeezed with 15 middle part lower face of air bladder；Lower sealing pressure
Disk is fastenedly connected with upper sealing platen 14, and 19 upper end of hollow air discharge axis, spring tray 20,15 middle part of air bladder is made to be connected to one
It rises.Can be reliably connected hollow air discharge axis 19, spring tray 20, air bladder 15 by sealing platen.
19 lower end of hollow air discharge axis is connected by being vented telescoping tube 26 with 29 import of aspiration pump；Convenient for hollow air discharge axis
19 up and down motion.
The hollow air discharge axis 19 is connected by sealing ring 23 with air cavity lower end centre exit；It is reliable to improve sealing performance.
The air-breathing spring 11 is four, is evenly distributed with around 20 intermediate openings of spring tray；20 uniform force of spring tray, work
Work is stablized.
The compressed air intake and exhaust equipment includes the air inlet-outlet pipe 18 that is connected with compressed air cell 21, outside air inlet-outlet pipe 18
End is connected with purging 17 first end of triple valve, purge triple valve 17 second end respectively with compressed air source 22 and compressed air gas storage
Tank 6 is connected, and 17 third end of purging triple valve is exhaust outlet；Purge the control of the control signal input mouth and controller of triple valve 17
Signal output port processed is connected.Setting purging triple valve 17 is convenient for the control of 21 intake and exhaust of compressed air cell.
Sample air cavity air bleeding valve 24, the control signal input of sample air cavity air bleeding valve 24 are provided on the hollow air discharge axis 19
Mouth is connected with the control signal output mouth of controller.Sample air cavity air bleeding valve 24 is set to be convenient for 9 gas exhaust inspecting of sample air cavity.
Limiting feedback board 36 is provided on the hollow air discharge axis 19, limiting feedback board 36, which is provided with upper purging, to be limited
Bit switch 34 and lower sampling limit switch 35, detection signal output port, the lower sampling limit switch of upper purging limit switch 34
35 detection signal output port is connected respectively with the detection signal input port of controller.Setting limiting feedback board 36, on blow
Limit switch 34 and lower sampling limit switch 35 are swept, convenient for the control of 19 shift position of hollow air discharge axis.
8 upper shaft of probe purging check nozzle connect can outward above the non-return flap dug；Simple in structure, non-return effect
Reliably.
The air cavity includes the upper air cavity housing and lower air chamber housing of make-up connection, upper air cavity housing and lower air chamber housing pair
Buckle is clipped in by upper and lower flanged joint, 15 periphery of air bladder between lower flange；Convenient for being reliably connected for air bladder 15.
The utility model further includes multiple spot spiral-flow type gas sampling device, and multiple spot spiral-flow type gas sampling device includes eddy flow
Mixing chamber and multiple sampling branch pipes 5, each 5 sample point of branch pipe that samples is in 30 radially uniform arrangement of flue；Sampling branch pipe 5 is mixed with eddy flow
Room connection is closed, 2 direction of sampling branch outlet is evenly distributed by same clockwise in eddy flow mixing chamber；Above eddy flow mixing chamber
It is provided with analysis meter probe or sampling probe installation interface；Eddy flow mixing chamber is arranged on the air cavity upper center, and eddy flow mixes
Room lower end is closed to connect with air cavity by mixing chamber exhaust non-return flap 12 and probe purging check nozzle 8.Multiple spot equivalent extracts
Sample gas forms eddy flow in eddy flow mixing chamber, and sample gas is made uniformly to mix.
Each sampling 5 sample point of branch pipe of the utility model reaches the sampling of multi-point grid method in the radially uniform arrangement of pipeline
It is required that；Before putting into operation, every sampling 5 sample throughput of branch pipe is adjusted into, makes every sampling 5 sample throughput of branch pipe identical；Sampling branch
Pipe 5 is connected with eddy flow mixing chamber 4, and evenly distributed by same clockwise in eddy flow mixing chamber 4 so that gas enters mixing
Eddy flow is formed behind room to be sufficiently mixed；The aspiration pump 29 makes flue gas be flowed in air cavity, and drives eddy flow mixing chamber 4 and each
Sample flow of flue gas in branch pipe 5.
The number of the sampling branch pipe 5 is four.
The eddy flow mixing chamber 4 is cylinder.
The sampling branch pipe 5 includes top branch pipe 43 and stretches into the sampling probe 40 inside flue 30, under sampling probe 40
It holds as step structure 33,40 top of sampling probe is connect with 30 wall of flue by tuning connector 28, and 40 upper end of sampling probe passes through
Dismantled and assembled connector 27 is connected with 43 lower end of top branch pipe.It is connected using tuning connector 28, step can be made 360 ° in flue 30
Rotation, by adjusting direction of the step in 30 air-flow of flue（Step to sample to entrance towards gas to compared with backwards to gas
The flue gas flow of branch pipe 5 is big）So that it is identical to enter each sampling 5 sample throughput of branch pipe.
The tuning connector 28 includes connector 42, and 42 lower end of connector is welded with 30 wall of flue, and sampling probe 40 passes through
42 middle through-hole of connector, 42 upper end outer wall of connector are provided with external screw thread, and 42 upper end inner wall of connector is inclined opening structure, and one justifies
41 lower end of mesa-shaped cutting ferrule is sandwiched in angle and is placed on 40 outside of sampling probe, and 42 upper end of connector is rotary with to match with the external screw thread
The nut 39 of conjunction, 39 upper end inner wall of nut are mutually squeezed with 41 upper surface of cutting ferrule.
The dismantled and assembled connector 42 includes hollow joint body 44, and 40 upper end of sampling probe is inserted in 44 lower part of fittings body,
Branch pipe 43 lower end in top is inserted in 44 top of fittings body, 44 top and bottom outer wall of fittings body be both provided with external screw thread and with outer spiral shell
The matched nut 39 of line, 44 top and bottom outer wall of fittings body are inclined opening structure, and round table-like 41 lower end of cutting ferrule is sandwiched in tiltedly
In mouthful, the cutting ferrule 41 of 44 upper end of fittings body is placed on 43 outside of top branch pipe, and the cutting ferrule 41 of 44 lower end of fittings body is placed on sampling probe
40 outsides；The 39 upper end inner wall of nut of 44 upper end of fittings body and 41 upper surface of cutting ferrule of 44 upper end of fittings body mutually squeeze, fittings body
39 lower end inner wall of nut of 44 lower ends is mutually squeezed with 41 lower face of cutting ferrule of 44 lower end of fittings body.
Direction of the utility model by adjusting step in 30 air-flow of flue makes the sample air-flow for entering each sampling branch pipe 5
It measures identical.
The sampling branch pipe 5 is inverted L-shaped pipe；Sampling 5 upper end transverse tube of branch pipe and 4 sidewall weld of eddy flow mixing chamber use anchor ear
Connector connects.
The analysis meter is arranged on analysis meter spy using the analysis meter for having self-suction function, sampling branch outlet 2
Head lower section；The service life of analysis meter probe can be extended, and reduce dust stratification.
The analysis meter for having self-suction function is using snow enlightening dragon SCS-900C type analysis instrument.
The analysis meter is arranged on analysis meter using the analysis meter for not having self-suction function, sampling branch outlet 2
Probe middle and upper part；Analysis meter probe and smoke contacts area can be increased.
The analysis meter for not having self-suction function uses 210 type oxygen analysers of AMETEK.
The utility model further includes detection sampling branch pipe temperature sensor, detects temperature sensor in flue, controller
Signal input port is detected to sample the detection signal output port of branch pipe temperature sensor with detection respectively, detect temperature in flue
The detection signal output port of sensor is connected.
The detection sampling branch pipe temperature sensor is arranged on sampling branch pipe 5 and two meters above 30 junction of flue of sampling
On 5 outer wall of branch pipe.Temperature sensor is arranged on sampling 5 outer wall of branch pipe, can prevent sampling blockage.Temperature sensor can also be set
It puts in inverted L horizontal segment.Temperature sensor is arranged on sampling branch pipe 5 and two meters above 30 junction of flue, can prevent because of metal tube
The heat transfer in road, caused temperature point misalignment.
5 outer wall of sampling branch pipe between the eddy flow mixing chamber 4 and flue 30 is set except detection samples branch pipe temperature sensor
Do isothermal holding in the place of putting.Flue-gas temperature is higher than environment temperature, will heating sampling branch pipe 5 during sample air-flow over sampling branch pipe 5.To protect
It demonstrate,proves branch pipe to occur to block when failures, samples 5 temperature rapid decrease of branch pipe, sample and do not kept the temperature at 5 thermometric of branch pipe.
Each sampling 5 temperature of branch pipe of controller detection, if a certain sampling 5 temperature of branch pipe and other sampling 5 temperature of branch pipe
Or 32 deviation of flue temperature, when exceeding setting value, controller sends out 5 jam signal of sampling branch pipe, control unperturbed back-blowing device into
Row sampler purges.
9 volume of sample air cavity is more than the sum of eddy flow mixing chamber 4 and each sampling 5 tunnel volume of branch pipe；Ensure that pipeline purging fills
Divide, quickly suck back sample gas.
Sampling branch pipe solenoid valve 1, the control letter of sampling branch pipe solenoid valve 1 are provided on the sampling 5 upper end transverse tube of branch pipe
Number input port is connected with the control signal output mouth of controller.Under sampling state, sampling branch pipe solenoid valve 1 and sample air cavity row
Air valve 24 is opened, and purging triple valve 17 is closed.
The depth that the sampling branch pipe 5 is stretched into inside flue 30 is different；Detection is more comprehensively, accurately.
Illustrate the course of work of the utility model below in conjunction with the accompanying drawings.
When a jam does occur（For sampling branch pipe 5a and block）, sampling branch pipe temperature 13a temperature less than 13b, 13c,
13d, 32d are more, and controller judges that sampling branch pipe 5a is blocked, and send out signal-off sample air cavity air bleeding valve 24 and sampling branch pipe electromagnetism
Valve 1b, 1c, 1d open purging triple valve 17.Compressed air is by compressed air reservoir 6 and compressed air source 22 through air inlet-outlet pipe
18 enter compressed air cell 21, air bladder 15 and spring tray 20 are pushed to squeeze air-breathing spring 11 so that the sample in sample air cavity 9
Gas purges check nozzle 8 by probe and measuring instrumentss filter probe device 3 is purged into eddy flow mixing chamber 4.At the same time
Exhaust non-return flap 12 is automatically closed, pressure rise in eddy flow mixing chamber 4, and sample gas, which enters, purges sampling branch pipe 5a, limits
Feedback board 36, which is moved to blow, sweeps limit switch, above sweeps limit switch and signals to purging completion at controller.
After the completion of purging, controller sends out signal-off purging triple valve 17, opens sampling branch pipe solenoid valve 1b, 1c, 1d,
Air bladder 15 moves down under the effect of air-breathing spring 11, and 21 volume-diminished of compressed air cell, compressed air is through exhaust pipe 31
And purging triple valve 17 is discharged, 9 volume expansion of sample air cavity generates negative pressure sampled branch pipe 5a, 5b, 5c, 5d and eddy flow mixing chamber 4
Sample gas is sucked, limiting feedback board 36 is moved at lower sampling limit switch 35, and lower sampling limit switch 35 signals to controller,
Sample air cavity air bleeding valve 24 is opened in controller control, restores sampling state.It can be with likewise, sampling branch pipe solenoid valve 1 by control
Different pipelines is purged.
By compressed air pressure, each section caliber, 11 intensity of air-breathing spring, chamber volume determine purge cycles length, one
As complete in a few seconds.Purge gas is sample gas, and sample air-blowing into after eddy flow mixing chamber 4 and sampling branch pipe 5 tunnel can rapidly by
New sample aspiration returns, it is ensured that the continuity of instrument measurement；Blowback tamper process does not influence gas and continuously monitors.
It is understood that above with respect to the specific descriptions of the utility model, it is merely to illustrate the utility model and is not
The described technical solution of the utility model embodiment is limited to, it will be understood by those of ordinary skill in the art that, it still can be with
It modifies to the utility model or equivalent replacement, to reach identical technique effect；As long as meet using needs, all in this reality
Within novel protection domain.
Claims (10)
1. a kind of unperturbed back-blowing device, including air cavity, it is characterised in that air cavity upper center is provided with mixing chamber exhaust non-return flap,
Air cavity upper end is provided with the probe purging check nozzle that middle part is dried upward around mixing chamber exhaust non-return flap, in air cavity lower end
Portion outlet is provided with aspiration pump, and air cavity lower end inner wall is provided with air bladder, air bladder week around air cavity lower end centre exit
Side is connected with air cavity wall, is compressed air cell between air bladder and air cavity lower end inner wall, air bladder and air cavity upper end inner wall
Between for sample air cavity, compressed air cell is connected with compressed air intake and exhaust equipment；
Upper end is connect with spring tray in the middle part of air bladder, and spring tray intermediate openings are connected with air cavity lower end centre exit, bullet
Air-breathing spring is provided between spring bracket disk and air cavity upper end inner wall.
2. a kind of unperturbed back-blowing device according to claim 1, it is characterised in that a hollow air discharge axis lower end sequentially passes through bullet
Spring bracket disk intermediate openings, air cavity lower end centre exit are connected with pumping pump inlet, and hollow air discharge axis upper end is exposed in spring tray
Portion is open and is provided with sealing platen, and upper sealing platen lower face is mutually squeezed with upper surface in the middle part of spring tray, compressed air
Lower sealing platen is provided on the outside of the hollow air discharge axis of intracavitary, lower sealing platen upper surface is mutually squeezed with lower face in the middle part of air bladder
Pressure；Lower sealing platen is fastenedly connected with upper sealing platen, connects hollow air discharge axis upper end, spring tray, air bladder middle part
Together.
3. a kind of unperturbed back-blowing device according to claim 2, it is characterised in that the hollow air discharge axis lower end passes through exhaust
Telescoping tube is connected with pumping pump inlet.
4. a kind of unperturbed back-blowing device according to claim 2, it is characterised in that the hollow air discharge axis by sealing ring with
Air cavity lower end centre exit is connected.
5. a kind of unperturbed back-blowing device according to claim 1, it is characterised in that the air-breathing spring is four, around spring
Pallet intermediate openings are evenly distributed with.
6. a kind of unperturbed back-blowing device according to claim 1, it is characterised in that the compressed air intake and exhaust equipment includes
The air inlet-outlet pipe connected with compressed air cell, air inlet-outlet pipe outer end are connected with purging triple valve first end, purge triple valve second
End is connected respectively with compressed air source and compressed air reservoir, and purging triple valve third end is exhaust outlet；Purge triple valve
Control signal input mouth is connected with the control signal output mouth of controller.
7. a kind of unperturbed back-blowing device according to claim 2, it is characterised in that be provided with sample gas on the hollow air discharge axis
Chamber air bleeding valve, the control signal input mouth of sample air cavity air bleeding valve are connected with the control signal output mouth of controller.
8. a kind of unperturbed back-blowing device according to claim 2, it is characterised in that be provided with limiting on the hollow air discharge axis
Feedback board is provided with upper purging limit switch and lower sampling limit switch corresponding to limiting feedback board, upper purging limit switch
Detect signal output port, it is lower sampling limit switch detection signal output port respectively with the detection signal input part of controller
Mouth is connected.
A kind of 9. unperturbed back-blowing device according to claim 1, it is characterised in that the probe purging check upper end of nozzle axis
Connecing can the non-return flap dug of top outward.
10. a kind of unperturbed back-blowing device according to claim 1, it is characterised in that the air cavity includes the upper gas of make-up connection
Cavity shell and lower air chamber housing, upper air cavity housing pass through upper and lower flanged joint, air bladder periphery with lower air chamber housing to buckle
It is clipped between lower flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721294410.7U CN207463749U (en) | 2017-10-10 | 2017-10-10 | A kind of unperturbed back-blowing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107570497A (en) * | 2017-10-10 | 2018-01-12 | 冷猛 | A kind of unperturbed back-blowing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107570497A (en) * | 2017-10-10 | 2018-01-12 | 冷猛 | A kind of unperturbed back-blowing device |
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