CN109085110A - Check device and its check method during a kind of single step ventilation rate master bar - Google Patents
Check device and its check method during a kind of single step ventilation rate master bar Download PDFInfo
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- CN109085110A CN109085110A CN201811080457.2A CN201811080457A CN109085110A CN 109085110 A CN109085110 A CN 109085110A CN 201811080457 A CN201811080457 A CN 201811080457A CN 109085110 A CN109085110 A CN 109085110A
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- 238000009423 ventilation Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 6
- 238000010943 off-gassing Methods 0.000 claims description 3
- 238000009530 blood pressure measurement Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 210000005239 tubule Anatomy 0.000 claims 1
- 235000019504 cigarettes Nutrition 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000013102 re-test Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/10—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing diffusion of components through a porous wall and measuring a pressure or volume difference
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Chemical & Material Sciences (AREA)
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Fluid Mechanics (AREA)
- Measuring Volume Flow (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention discloses check device and check methods during a kind of single step ventilation rate master bar, including quantitative negative pressure device, fixture, first differential pressure pickup, second differential pressure pickup, third differential pressure pickup, first flow sensor and second flow sensor, fixture is equipped with the first air inlet, gas outlet, second air inlet, first flow sensor series are between the inlet end of quantitative negative pressure device and the outlet side of fixture, first differential pressure pickup, second differential pressure pickup is connected to the outlet side of first flow sensor, inlet end, second air inlet is connected with second flow sensor, second differential pressure pickup is connected in parallel between the first air inlet and the second air inlet, second flow sensor is connected to the second air inlet of fixture, third differential pressure pickup is connected to the outlet side of second flow sensor.Two flow sensors are as standard, and the total flow and vent flow of measurement standard stick, single step complete the measurement of master bar magnitude respectively.
Description
Technical field
The invention belongs to cigarette detecting instrument standard component collimation technique fields, and in particular to a kind of single step ventilation rate standard
Check device and check method during stick.
Background technique
Cigarette ventilation rate includes filter ventilation rates, paper ventilation rate, total ventilation rate, generally use cigarette ventilation rate analyzer and
The measurement of cigarette physical property combined test stand, cigarette ventilation rate size not only influence the inherent quality of cigarette product, can also change
Gas Parameters.Ventilation rate master bar is the standard component used on cigarette ventilation rate detecting instrument, and ventilation rate master bar decides volume
Cigarette ventilation rate measurement data accuracy, annual calibrating is primary as required, to guarantee the traceability of ventilation rate master bar magnitude.
Many enterprises think that, as long as carrying out periodic verification to ventilation rate master bar, ventilation rate master bar magnitude is exactly reliable
Constant.However in fact, ventilation rate master bar within the re-testing periods, if saving careless and improper use, will lead to ventilation rate
Master bar metering performance changes, and does not ensure that the lasting credible of ventilation rate master bar calibrating state.Therefore, it is necessary to examine
It is verified during being carried out in fixed cycle to ventilation rate master bar, is verified by period, can find the magnitude of ventilation rate master bar in time
Misalignment, and shorten the retrospect time after misalignment, to improve the confidence level of cigarette ventilation rate measurement data, reduce ventilation rate master bar
Calibrating state is abnormal variation bring risk.
Ventilation rate master bar is examined and determine currently, tobacco business generallys use soap film flowmeter as standard, but is not had
Check standard device and check method during corresponding.Therefore, it is necessary to develop a set of highly reliable, high-efficient ventilation rate mark
Check standard device during quasi- stick, and establish corresponding ventilation rate master bar check method.
Summary of the invention
Based on the deficiencies of the prior art, the purpose of the present invention is to provide verify during a kind of single step ventilation rate master bar
Standard set-up and check method.
Check device during a kind of single step ventilation rate master bar, the quantitative negative pressure dress including generating constant negative pressure air-flow
Set, clamp fixture, the first differential pressure pickup, the second differential pressure pickup, the third differential pressure pickup, first flow sensing of master bar
Device and second flow sensor, the both ends of the fixture are respectively equipped with the first air inlet and air outlet, and side is equipped with the
Two air inlets, the first flow sensor series are described between the inlet end of quantitative negative pressure device and the outlet side of fixture
First differential pressure pickup, the second differential pressure pickup are connected to the outlet side of first flow sensor, inlet end, the second air inlet
Mouthful be connected with the second flow sensor, second differential pressure pickup be connected in parallel on the first air inlet and the second air inlet it
Between, the second flow sensor is connected to the second air inlet of fixture, and the third differential pressure pickup is connected to second flow biography
The outlet side of sensor.
The quantitative negative pressure device includes vacuum generator, sonic nozzle and filtering pressure regulator valve, the vacuum generator
Positive pressure side is connect with filtering pressure regulator valve, the sonic nozzle gas outlet and the negative press bond of vacuum generator, and the fixture goes out
Port is connected with sonic nozzle air entry.
The master bar is cylindrical structure comprising air inlet end face, outlet end face, external cylindrical surface, total capilar bore pass through
It is through between outlet end face and air inlet end face, external cylindrical surface is equipped with ventilation capilar bore by near outgassing end face position, capillary of divulging information
Pore connects with total capilar bore.
The first flow sensor and second flow sensor are piston type volume flow sensor or heat type flow quantity
Sensor, accuracy are not less than 1.0 grades, subsidiary gas temperature, atmospheric pressure measurement device.
The accuracy of first differential pressure pickup, the second differential pressure pickup and third differential pressure pickup is not less than 0.1
Grade.
A kind of master bar ventilation rate check method, comprising the following steps:
S1: master bar is installed in fixture, and ventilation capilar bore corresponds to the second air inlet of fixture, fixture it is close
The external cylindrical surface of inner wall and master bar at first air inlet seals；
S2: vent flow measurement, pressure-stabilized air source enter filtering pressure regulator valve, and the compressed air after pressure regulation is in vacuum generator
Under effect, negative pressure is generated, after negative pressure air flows through fixed-size sonic nozzle, steady flow occurs in sonic nozzle inlet end
Amount, first flow sensor are used to measure the accurate flow value of sonic nozzle inlet end；In the aspiration procedure of constant flow rate, one
Road gas enters from the inlet end surface current of master bar, ventilation capilar bore of the another way gas through second flow sensor, master bar
It flows into；First differential pressure pickup is used to measure the pressure value of first flow sensor outlet side, and the second differential pressure pickup is for surveying
The pressure value of fixture outlet side is measured, third differential pressure pickup is used for the pressure value of the second measuring flow sensor outlet side；
S3 records first flow sensor, the flow of second flow sensor shows after the stability of flow by master bar
Value is respectively Q1、Q2, the first differential pressure pickup, the second differential pressure pickup, third differential pressure pickup pressure indicating value be respectively P1、
PD、P2, atmospheric pressure is P at this time；
The total flow Q of master bar is as follows,
The vent flow Q of master barVIt is as follows,
The ventilation rate V of master bar is as follows,
Beneficial effects of the present invention: the present invention, as standard, is respectively used to measurement ventilation rate using two flow sensors
The total flow and vent flow of master bar, single step complete the measurement of ventilation rate master bar magnitude, and Measurement reliability is strong, work effect
Rate is high.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment；
Fig. 2 is master bar structural schematic diagram；
Fig. 3 is master bar section enlarged diagram；
In figure: 1, filtering pressure regulator valve, 2, vacuum generator, 3, sonic nozzle, the 4, first differential pressure pickup, 5, first flow
Sensor, the 6, second differential pressure pickup, 7, fixture, 8, master bar, 9, second flow sensor, 10, third differential pressure pickup,
11, external cylindrical surface, 12, outlet end face, 13, air inlet end face, 14, total capilar bore, 15, ventilation capilar bore.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
Please refer to Fig. 1.Structure, ratio, size depicted in this specification institute attached drawing etc., only to cooperate specification institute
The content of announcement is not intended to limit the invention enforceable qualifications so that those skilled in the art understands and reads,
Therefore not having technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing this hair
Under bright the effect of can be generated and the purpose that can reach, the model that disclosed technology contents can be covered should all be still fallen in
In enclosing.Meanwhile cited such as "upper" in this specification, "lower", "left", "right", " centre " and " one " term, be also only
Convenient for being illustrated for narration, rather than to limit the scope of the invention, relativeness is altered or modified, in no essence
It changes under technology contents, when being also considered as the enforceable scope of the present invention.
As shown in Figure 1, check device during a kind of single step ventilation rate master bar, including generating determining for constant negative pressure air-flow
Fixture 7, the first differential pressure pickup 4, the second differential pressure pickup 6, third differential pressure pickup measured negative pressure device, clamp master bar 8
10, first flow sensor 5 and second flow sensor 9, accuracy are not less than 0.5 grade, subsidiary gas temperature, atmospheric pressure
Force measuring device.The accuracy of first differential pressure pickup 4 and the second differential pressure pickup 6 is not less than 0.1 grade.
The both ends of the fixture 7 are respectively equipped with the first air inlet 71 and gas outlet, and side is equipped with the second air inlet 72,
The first flow sensor 5 is series between the inlet end of quantitative negative pressure device and the outlet side of fixture 7, first pressure difference
Sensor 4, the second differential pressure pickup 6 are connected to the outlet side of first flow sensor 5, inlet end, the second air inlet 72
It is connected with the second flow sensor 9, second differential pressure pickup 6 is connected in parallel on the first air inlet 71 and the second air inlet
Between 72, the second flow sensor 9 is connected to 7 second air inlet 72 of fixture, and the third differential pressure pickup 10 is connected to
The outlet side of second flow sensor 9.
The quantitative negative pressure device includes that vacuum generator 2, sonic nozzle 3 and filtering pressure regulator valve 1, the vacuum occur
The positive pressure side of device 2 is connect with filtering pressure regulator valve 1,3 gas outlet of sonic nozzle and the negative press bond of vacuum generator 2, the folder
The gas outlet of tool 7 is connected with 3 air entry of sonic nozzle.
As shown in Figure 2 and Figure 3, the master bar 8 is cylindrical structure comprising air inlet end face 13, outlet end face 12, outer
Cylindrical surface 11, for total capilar bore 14 through between outlet end face 12 and air inlet end face 13, external cylindrical surface 11 leans near outgassing end face
12 positions are equipped with ventilation capilar bore 15, and ventilation capilar bore 15 connects with total capilar bore 14.
In 8 course of work of master bar, test air is flowed into from ventilation capilar bore 15 and air inlet end face 13, and two-way air converges
It is flowed out after poly- from total capilar bore 14 of outlet end face 12.The air mass flow and total capilar bore 14 that ventilation capilar bore 15 flows into
The ratio between air mass flow of outflow is the ventilation rate of master bar 8.8 ventilation rate magnitude range of master bar is 0~100%, is usually made
Magnitude is 20%, 50%, 80%.
A kind of master bar ventilation rate check method, comprising the following steps:
S1: master bar 8 is installed in fixture 7, and ventilation capilar bore corresponds to the second air inlet 72 of fixture 7, fixture 7
The external cylindrical surface of inner wall and master bar 8 at the first close air inlet 71 seals；
S2: as shown in Figure 1, vent flow measures, pressure-stabilized air source enters filtering pressure regulator valve 1, and the compressed air after pressure regulation exists
Under the action of vacuum generator 2, generate negative pressure, after negative pressure air flows through fixed-size sonic nozzle 3, sonic nozzle 3 into
There is constant flow rate in gas end, and first flow sensor 5 is used to measure the accurate flow value of 3 inlet end of sonic nozzle；In steady flow
In the aspiration procedure of amount, gas enters from the inlet end surface current of master bar 8 all the way, and another way gas is through second flow sensor 9, mark
The ventilation capilar bore of quasi- stick 8 flows into；First differential pressure pickup 4 is used to measure the pressure value of 5 outlet side of first flow sensor,
Second differential pressure pickup 6 is used for the pressure value of 7 outlet side of measured material, and third differential pressure pickup 10 is passed for the second measuring flow
The pressure value of sensor outlet side；
S3 is after the stability of flow by master bar 8, the flow of record first flow sensor 5, second flow sensor 9
Indicating value is respectively Q1、Q2, the pressure indicating value difference of the first differential pressure pickup 4, the second differential pressure pickup 6, third differential pressure pickup 10
For P1、PD、P2, atmospheric pressure is P at this time；
The total flow Q of master bar 8 is as follows:
The vent flow Q of master bar 8VIt is as follows:
The ventilation rate V of master bar 8 is as follows:
This standard stick 8 period check device, as standard, is respectively used to measurement ventilation rate mark using two flow sensors
The total flow and vent flow of quasi- stick 8, single step complete the measurement of 8 magnitude of ventilation rate master bar, and Measurement reliability is strong, work effect
Rate is high.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (8)
1. check device during a kind of single step ventilation rate master bar, it is characterised in that: including generating determining for constant negative pressure air-flow
Fixture, the first differential pressure pickup, the second differential pressure pickup, the third differential pressure pickup, first measured negative pressure device, clamp master bar
Flow sensor and second flow sensor, the both ends of the fixture are respectively equipped with the first air inlet and air outlet, side
Face be equipped with the second air inlet, the first flow sensor series in quantitative negative pressure device inlet end and fixture outlet side it
Between, first differential pressure pickup, the second differential pressure pickup are connected to the outlet side of first flow sensor, inlet end,
Second air inlet is connected with the second flow sensor, and second differential pressure pickup is connected in parallel on the first air inlet and second
Between air inlet, the second flow sensor is connected to the second air inlet of fixture, and the third differential pressure pickup is connected to
The outlet side of two flow sensors.
2. seeking check device during the 1 single step ventilation rate master bar according to right, it is characterised in that: the quantitative negative pressure dress
It sets and is connect including vacuum generator, sonic nozzle and filtering pressure regulator valve, the positive pressure side of vacuum generator with filtering pressure regulator valve,
The gas outlet of the sonic nozzle and the negative press bond of vacuum generator, the gas outlet of the fixture and the air entry of sonic nozzle
It is connected.
3. seeking check device during the 1 single step ventilation rate master bar according to right, it is characterised in that: the master bar is circle
Column structure comprising air inlet end face, outlet end face, external cylindrical surface, total capilar bore inside master bar is through outlet side
Between face and air inlet end face, external cylindrical surface is equipped with ventilation capilar bore, ventilation capilar bore and total hair by near outgassing end face position
Tubule hole connects.
4. seeking check device during the 1 single step ventilation rate master bar according to right, it is characterised in that: the first flow passes
Sensor and second flow sensor are piston type volume flow sensor or thermal flow rate sensor, and accuracy is not less than
1.0 grades, subsidiary gas temperature, atmospheric pressure measurement device.
5. seeking check device during the 1 single step ventilation rate master bar according to right, it is characterised in that: first pressure difference passes
The accuracy of sensor, the second differential pressure pickup and third differential pressure pickup is not less than 0.1 grade.
6. a kind of master bar ventilation rate check method based on any check device of claim 1 to 5, which is characterized in that
The following steps are included:
S1: master bar is installed in fixture, and ventilation capilar bore corresponds to the second air inlet of fixture, close first of fixture
The external cylindrical surface of inner wall and master bar at air inlet seals；
S2: vent flow measurement, pressure-stabilized air source enter filtering pressure regulator valve, effect of the compressed air after pressure regulation in vacuum generator
Under, negative pressure is generated, after negative pressure air flows through fixed-size sonic nozzle, constant flow rate occurs in sonic nozzle inlet end, the
One flow sensor is used to measure the accurate flow value of sonic nozzle inlet end；In the aspiration procedure of constant flow rate, gas all the way
Body enters from the inlet end surface current of master bar, and another way gas is flowed into through the ventilation capilar bore of second flow sensor, master bar；
First differential pressure pickup is used to measure the pressure value of first flow sensor outlet side, and the second differential pressure pickup is used for measured material
The pressure value of outlet side, third differential pressure pickup are used for the pressure value of the second measuring flow sensor outlet side；
S3 is after the stability of flow by master bar, the flow indicating value point of record first flow sensor, second flow sensor
It Wei not Q1、Q2, the first differential pressure pickup, the second differential pressure pickup, third differential pressure pickup pressure indicating value be respectively P1、PD、P2,
Atmospheric pressure is P at this time；
The total flow Q of master bar is as follows,
The vent flow Q of master barVIt is as follows,
The ventilation rate V of master bar is as follows,
7. master bar ventilation rate calibration method according to claim 6, it is characterised in that: pressure-stabilized air source pressure described in S1
Not less than 0.6Pa.
8. master bar ventilation rate calibration method according to claim 6, it is characterised in that: constant flow rate described in S1 is
17.5mL/s。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811080457.2A CN109085110B (en) | 2018-09-17 | 2018-09-17 | One-step ventilation rate standard rod period checking device and checking method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811080457.2A CN109085110B (en) | 2018-09-17 | 2018-09-17 | One-step ventilation rate standard rod period checking device and checking method thereof |
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| Publication Number | Publication Date |
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| CN109085110A true CN109085110A (en) | 2018-12-25 |
| CN109085110B CN109085110B (en) | 2023-08-18 |
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| Publication number | Publication date |
|---|---|
| CN109085110B (en) | 2023-08-18 |
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