CN106997216B - Constant-pressure bin for cigarette smoking machine and smoking experiment method thereof - Google Patents
Constant-pressure bin for cigarette smoking machine and smoking experiment method thereof Download PDFInfo
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- CN106997216B CN106997216B CN201710359471.5A CN201710359471A CN106997216B CN 106997216 B CN106997216 B CN 106997216B CN 201710359471 A CN201710359471 A CN 201710359471A CN 106997216 B CN106997216 B CN 106997216B
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- bin
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a constant pressure bin for a cigarette smoking machine and a method for a smoking experiment of the constant pressure bin, and aims to provide a constant pressure bin for a cigarette smoking machine and a method for a smoking experiment of the constant pressure bin. The constant-pressure bin comprises a bin body, and a smoke pipe is led out of the bin body; the device also comprises a closed exhaust auxiliary bin; a guide plate is arranged in the exhaust auxiliary bin to divide the inner cavity of the exhaust auxiliary bin into an exhaust cavity and a balance cavity which are communicated with each other; the flue gas pipe is communicated with an exhaust cavity of the exhaust auxiliary bin, and an exhaust pipe with an exhaust valve is arranged on the exhaust cavity of the exhaust auxiliary bin; the balance cavity of the exhaust auxiliary bin is communicated with the bin body through a pressure balance pipe, and an air filter is arranged on the pressure balance pipe. The invention can ensure that equipment such as a cigarette smoking machine and the like can carry out inspection work under the environment of simulating standard atmospheric pressure, thereby improving the measurement precision of detection equipment under non-standard atmospheric pressure.
Description
Technical Field
The invention relates to the technical field of auxiliary equipment for cigarette detection, in particular to a constant-pressure bin for a cigarette smoking machine and a smoking experiment method thereof.
Background
Cigarette smoke contains 5000 components, which contain trace amounts of deleterious polycyclic aromatic hydrocarbons. Harmful substances such as polycyclic aromatic hydrocarbon generated by cigarette combustion exist in tar. The method has the defects of a plurality of steps for measuring the polycyclic aromatic hydrocarbon, low analysis efficiency and incapability of being widely applied to practical execution. In contrast, tar measurement is relatively simple and rapid, and therefore, the level of the amount of tar used internationally is one of the indicators for evaluating the safety of cigarettes. The measurement result of the tar content of the cigarettes is affected by the atmospheric pressure to form consensus, and the mechanism of the influence is that the oxygen content in the air with the same volume is different due to the different atmospheric pressure, so that the combustion of the cigarettes is definitely affected, and accordingly, the analysis result is affected to a certain extent. The research shows that the measurement results of the cigarette tar amount and the smoke carbon monoxide in the laboratory in the high-altitude area have significant differences from those in the laboratory in the standard atmospheric pressure area.
After the development of the cigarette industry in China for more than 10 years, the national standard of the cigarette in China provides upper and lower limit control requirements for the tar amount, the nicotine amount and the carbon monoxide amount of the smoke. The measurement of cigarette tar is basically carried out by adopting a cigarette smoking machine, so as to solve the difference of test results in different areas, and is very important for quality supervision of cigarette products and internal quality control of production enterprises, therefore, the working environment of the cigarette smoking machine needs to be pressurized in a high-altitude area, and the existing equipment for pressurizing the high-altitude atmospheric pressure environment of the cigarette smoking machine has some defects generally, and is mainly characterized in that when the cigarette smoking machine forcibly discharges smoke, a smoke discharge pipeline of the cigarette smoking machine is communicated to a laboratory exhaust pipeline outside a constant-pressure bin, and the constant-pressure bin is unstable in pressure boost and large in pressure fluctuation, so that the detection precision is affected.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a constant-pressure bin for a cigarette smoking machine, which has simple structure, good air pressure stability and can improve detection precision, and a smoking experiment method thereof.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the constant pressure bin for the cigarette smoking machine comprises a bin body, wherein a smoke pipe is led out of the bin body; the device also comprises a closed exhaust auxiliary bin; a guide plate is arranged in the exhaust auxiliary bin to divide the inner cavity of the exhaust auxiliary bin into an exhaust cavity and a balance cavity which are communicated with each other; the flue gas pipe is communicated with an exhaust cavity of the exhaust auxiliary bin, and an exhaust pipe with an exhaust valve is arranged on the exhaust cavity of the exhaust auxiliary bin; the balance cavity of the exhaust auxiliary bin is communicated with the bin body through a pressure balance pipe, and an air filter is arranged on the pressure balance pipe.
Preferably, the air filter is located within the exhaust auxiliary bin.
Preferably, two first bin gates which are opened in opposite directions are arranged at the lower part of the front panel of the bin body, one side of the first bin gate is hinged with the front panel, and at least one of the other sides is provided with a first locking mechanism which is connected with the front panel; two second bin gates which are oppositely opened are arranged in the middle of the front panel, one side of each second bin gate is hinged with the front panel, and at least one of the other sides is provided with a second locking mechanism which is connected with the front panel; an observation window is arranged on the second bin gate of one bin gate; sealing rings are arranged on the inner sides of the first bin gate and the second bin gate.
Preferably, the sealing ring is a hollow ring.
Preferably, the lower end of the bin body is provided with a travelling wheel.
Preferably, a boss for positioning the sealing ring is arranged on the inner side of the first bin gate.
A method for carrying out a pumping experiment by using the constant pressure bin comprises the following steps of:
the cigarette smoking machine is arranged in the bin body, the air quantity in the bin body is supplemented by adopting a pressure maintaining buffer air storage tank, the air pressure in the bin body is ensured to be standard test atmospheric pressure, the flow quantity of the air outlet valve is regulated to be equivalent to the air inlet quantity of the bin body, and after the air pressure in the bin body is stable, the smoking machine is started to carry out a smoking experiment.
Preferably, the air inlet amount of the bin body is 3.3-4.9 m/min; the airflow velocity is (200+/-30) mm/s.
Preferably, the air pressure of the bin body is 86-106Kpa.
Preferably, the compressed air of the pressure-maintaining buffer air storage tank adopts a laboratory high-pressure air source which is dehumidified, deoiled and subjected to multistage filtration, and the humidity of the compressed air is lower than 20% RH.
Compared with the prior art, the invention has the following advantages:
by reasonable arrangement, the invention can effectively ensure that the smoke generated by the cigarette smoking machine during operation is discharged in time and ensure the pressure balance in the constant-pressure bin body. The during operation constant voltage storehouse body is through the flue pipe with the flue gas suction exhaust auxiliary storehouse of cigarette smoking machine production to set up pressure balance pipe guarantee exhaust auxiliary storehouse and constant voltage storehouse body and remain pressure balance throughout, the exhaust gas flow that gets into exhaust auxiliary storehouse then is equivalent with the mobile air compensation volume of admitting air, gets into exhaust auxiliary storehouse and then discharges through the blast pipe, realizes the invariable of constant voltage storehouse pressure, ensures that equipment such as cigarette smoking machine has higher measurement accuracy.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is an enlarged view of a portion of a first door and seal ring, with a second door and seal ring constructed identically thereto.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
The constant pressure bin for the cigarette smoking machine shown in fig. 1-2 comprises a bin body 1 for accommodating detection equipment such as the cigarette smoking machine, and a smoke pipe 2 is led out of the bin body 1; the device also comprises a closed exhaust auxiliary bin 3; a guide plate 4 is arranged in the exhaust auxiliary bin 3 to divide the inner cavity into an exhaust cavity and a balance cavity which are communicated with each other; the flue gas pipe 2 is communicated with an exhaust cavity of the exhaust auxiliary bin 3, and an exhaust pipe 5 with an exhaust valve 16 is arranged on the exhaust cavity of the exhaust auxiliary bin 3; the balance cavity of the exhaust auxiliary bin 3 is communicated with the bin body 1 through a pressure balance pipe 6, and an air filter 7 is arranged on the pressure balance pipe 6.
Wherein the air filter 7 is located in the exhaust auxiliary bin 3.
The lower part of the front panel of the bin body 1 is provided with two first bin gates 8 which are opened in opposite directions, one side of each first bin gate 8 is hinged with the front panel, and at least one of the other sides is provided with a first locking mechanism 9 which is connected with the front panel; two second bin gates 10 which are opened in opposite directions are arranged in the middle of the front panel, one side of each second bin gate 10 is hinged with the front panel, and at least one of the other sides is provided with a second locking mechanism 11 which is connected with the front panel; the second bin gate 10 of one bin gate is provided with an observation window 12; sealing rings 13 are arranged on the inner sides of the first bin gate 8 and the second bin gate 10. The bin body structure can facilitate the operation and maintenance of the cigarette smoking machine and the observation of the working process thereof.
Wherein the sealing ring 13 is a hollow ring. The sealing ring 8 with the structure is subjected to multidirectional force application by the bin gate, the front panel 2 and the internal air pressure, the sealing performance of the sealing ring is correspondingly increased as the internal air pressure is larger, and the hollow cavity can ensure that the internal air pressure is consistent, namely the force applied to the sealing ring 8 is basically consistent, the stress of the sealing ring 8 at each position is consistent, and no dead angle is ensured in sealing.
Wherein, the lower extreme of the storehouse body 1 is provided with the walking wheel 14, is convenient for quick movement.
The inner side of the first bin gate 8 is provided with a boss 15 for positioning the sealing ring 13, so that the sealing ring is convenient to install, and the inner side of the sealing ring can be supported; the second door is substantially identical in structure to the first door.
The invention designs the guide plate in the exhaust auxiliary bin, and the balance cavity of the exhaust auxiliary bin is communicated with the bin body through the pressure balance pipe, the purpose is to separate the bin body and the exhaust auxiliary bin in a non-sealing way by using the filter, the guide plate guides most of fresh smoke with higher concentration in the smoke pipe to the exhaust pipe for discharging, and a small part of the smoke is filtered by the filter and then flows back to the bin body, of course, the bin body can also flow back gas to the exhaust auxiliary bin through the filter, the state keeps the pressure balance between the bin body and the exhaust auxiliary bin at any time, the pressure balance state ensures the normal operation (different from an air compressor) of a common fan configured by a smoking machine, and finally the wind speed of the smoking machine can be effectively controlled.
A method for carrying out a pumping experiment by using the constant pressure bin comprises the following steps of:
the cigarette smoking machine is arranged in the bin body, the air quantity in the bin body is supplemented by adopting a pressure maintaining buffer air storage tank, the air pressure in the bin body is ensured to be standard test atmospheric pressure, the flow quantity of the air outlet valve is regulated to be equivalent to the air inlet quantity of the bin body, and after the air pressure in the bin body is stable, the smoking machine is started to carry out a smoking experiment.
The compressed air of the pressure-maintaining buffer air storage tank adopts a laboratory high-pressure air source which is dehumidified, deoiled and subjected to multistage filtration, and the humidity of the air is lower than 20% RH.
In the smoking experiment process of the cigarette smoking machine, as the combustion of the cigarette is an oxygen consumption process, the newly-entered air is required to be continuously utilized to discharge smoke so as to ensure that the whole smoking experiment process is in a standard test atmosphere environment. For this purpose, the air intake of the bin body is 3.3-4.9 m/min; the airflow velocity is (200+/-30) mm/s. The air pressure range of the bin body is 86-106Kpa.
Through verification, the error between each index obtained by the method and each index obtained by detection under the same atmospheric pressure condition is not more than 0.16%, and the method completely meets the detection requirement.
The invention adopts the pressure maintaining buffer air storage tank to supplement the air inlet quantity, can provide enough compressed air for the inner container equipment of the bin body in a shorter time, simultaneously avoids air source pressure fluctuation, and does not have adverse effect on surrounding equipment supplied by a concentrated air source.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. The constant pressure bin for the cigarette smoking machine comprises a bin body, wherein a smoke pipe is led out of the bin body; the method is characterized in that: the device also comprises a closed exhaust auxiliary bin; a guide plate is arranged in the exhaust auxiliary bin to divide the inner cavity of the exhaust auxiliary bin into an exhaust cavity and a balance cavity which are communicated with each other; the flue gas pipe is communicated with an exhaust cavity of the exhaust auxiliary bin, and an exhaust pipe with an exhaust valve is arranged on the exhaust cavity of the exhaust auxiliary bin; the balance cavity of the exhaust auxiliary bin is communicated with the bin body through a pressure balance pipe, and an air filter is arranged on the pressure balance pipe.
2. A constant pressure cartridge for a cigarette smoking machine as defined in claim 1, wherein: the air filter is positioned in the exhaust auxiliary bin.
3. A constant pressure cartridge for a cigarette smoking machine according to claim 1 or 2, wherein: two first bin gates which are opened in opposite directions are arranged at the lower part of the front panel of the bin body, one side of each first bin gate is hinged with the front panel, and at least one of the other sides is provided with a first locking mechanism which is connected with the front panel; two second bin gates which are oppositely opened are arranged in the middle of the front panel, one side of each second bin gate is hinged with the front panel, and at least one of the other sides is provided with a second locking mechanism which is connected with the front panel; an observation window is arranged on the second bin gate of one bin gate; sealing rings are arranged on the inner sides of the first bin gate and the second bin gate.
4. A constant pressure cartridge for a cigarette smoking machine as defined in claim 3, wherein: the sealing ring is a hollow ring.
5. A constant pressure cartridge for a cigarette smoking machine according to claim 1 or 2, wherein: the lower end of the bin body is provided with a travelling wheel.
6. A constant pressure cartridge for a cigarette smoking machine as defined in claim 3, wherein: the boss of a positioning sealing ring is arranged on the inner side of the first bin gate.
7. A method for performing a pumping experiment using the constant pressure cartridge of claim 1, using the apparatus of claim 1, comprising the steps of:
the cigarette smoking machine is arranged in the bin body, the air quantity in the bin body is supplemented by adopting a pressure maintaining buffer air storage tank, the air pressure in the bin body is ensured to be standard test atmospheric pressure, the flow quantity of the air outlet valve is regulated to be equivalent to the air inlet quantity of the bin body, and after the air pressure in the bin body is stable, the smoking machine is started to carry out a smoking experiment.
8. The method for performing aspiration experiments with a constant pressure cartridge of claim 7, wherein: the air inlet quantity of the bin body is 3.3-4.9 m/min; the airflow velocity is (200+/-30) mm/s.
9. The method for performing aspiration experiments with a constant pressure cartridge of claim 7, wherein: the air pressure of the bin body is 86-106Kpa.
10. A constant pressure cartridge for a cigarette smoking machine as defined in claim 7, wherein: the compressed air of the pressure-maintaining buffer air storage tank adopts a laboratory high-pressure air source which is dehumidified, deoiled and subjected to multistage filtration, and the humidity of the air is lower than 20% RH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710359471.5A CN106997216B (en) | 2017-05-19 | 2017-05-19 | Constant-pressure bin for cigarette smoking machine and smoking experiment method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710359471.5A CN106997216B (en) | 2017-05-19 | 2017-05-19 | Constant-pressure bin for cigarette smoking machine and smoking experiment method thereof |
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| CN106997216A CN106997216A (en) | 2017-08-01 |
| CN106997216B true CN106997216B (en) | 2023-06-09 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196458A (en) * | 2007-12-28 | 2008-06-11 | 辽宁省烟草公司鞍山市公司 | Device for checking air permeability of cigarette |
| CN101671735A (en) * | 2009-09-24 | 2010-03-17 | 中国烟草总公司郑州烟草研究院 | Improved cigarette smoke condensate Ames test |
| CN101799274A (en) * | 2010-03-22 | 2010-08-11 | 中国南方航空工业(集团)有限公司 | Device for detecting diameter of bar-shaped substance in tobacco processing industry |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3690149A (en) * | 1969-07-09 | 1972-09-12 | Giovanni Pezzi | Electropneumatic cigarette inspection |
| DE10050297A1 (en) * | 2000-10-10 | 2002-04-11 | Focke & Co | Cigarette package testing method involves applying pressure to package and measuring deformations, which are compared with predetermined measurements |
| ITBO20010203A1 (en) * | 2001-04-04 | 2002-10-04 | Gd Spa | DEVICE FOR PNEUMATIC CONTROL OF SMOKING ITEMS |
| CN200971967Y (en) * | 2006-03-29 | 2007-11-07 | 上海中荷环保有限公司 | Inserted rubber sealing device |
| CN200986542Y (en) * | 2006-12-12 | 2007-12-05 | 中国烟草总公司郑州烟草研究院 | Surroundings baccy flue gas experiment cabin |
| CN101158672A (en) * | 2007-11-05 | 2008-04-09 | 云南烟草科学研究院 | Method for accurately checking and confirming cigarette main stream flue gas index box index value |
| CN101520063B (en) * | 2009-03-30 | 2011-08-17 | 北京航空航天大学 | Constant-pressure water evaporator suitable for aerospace craft |
| CN102489350B (en) * | 2011-12-31 | 2013-09-18 | 中国烟草总公司郑州烟草研究院 | Experiment cabin system capable of adjusting atmospheric environmental pressure |
| CN102967565A (en) * | 2012-11-08 | 2013-03-13 | 云南昆钢煤焦化有限公司 | Method for measuring tar content in gas |
| CN103575760B (en) * | 2013-07-29 | 2016-03-30 | 中国科学技术大学 | A kind of measurement mechanism of combustion heat of cigarette and measuring method |
| CN204422497U (en) * | 2014-12-29 | 2015-06-24 | 云南中烟工业有限责任公司 | Change the Pressure chamber that highlands atmospheric environment affects smoking machine |
| CN204461970U (en) * | 2015-03-27 | 2015-07-08 | 中国烟草总公司郑州烟草研究院 | A kind of measurement mechanism controlling the standard instruments calibrating of air flow source |
| CN204575607U (en) * | 2015-04-16 | 2015-08-19 | 中国烟草总公司郑州烟草研究院 | A kind of regulation and control system of environmental chamber of smoking |
| CN106000483B (en) * | 2016-06-29 | 2019-11-01 | 中国计量科学研究院 | A kind of split type chamber that condensation is controllable |
| CN106501420B (en) * | 2016-09-30 | 2018-07-03 | 中国农业科学院烟草研究所 | One grows tobacco the extraction purification of middle neophytadiene and detection method and its application |
| CN206946326U (en) * | 2017-05-19 | 2018-01-30 | 云南中烟工业有限责任公司 | A kind of constant pressure storehouse of cigarette smoking machine |
-
2017
- 2017-05-19 CN CN201710359471.5A patent/CN106997216B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196458A (en) * | 2007-12-28 | 2008-06-11 | 辽宁省烟草公司鞍山市公司 | Device for checking air permeability of cigarette |
| CN101671735A (en) * | 2009-09-24 | 2010-03-17 | 中国烟草总公司郑州烟草研究院 | Improved cigarette smoke condensate Ames test |
| CN101799274A (en) * | 2010-03-22 | 2010-08-11 | 中国南方航空工业(集团)有限公司 | Device for detecting diameter of bar-shaped substance in tobacco processing industry |
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