CN218412194U - System for expanding testing range of gas transmittance tester and tester - Google Patents
System for expanding testing range of gas transmittance tester and tester Download PDFInfo
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- CN218412194U CN218412194U CN202222325822.XU CN202222325822U CN218412194U CN 218412194 U CN218412194 U CN 218412194U CN 202222325822 U CN202222325822 U CN 202222325822U CN 218412194 U CN218412194 U CN 218412194U
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Abstract
The utility model provides a system and a tester for expanding the testing range of a gas permeability tester, wherein a sample is arranged between an inner cavity opening of a first testing cavity and an inner cavity of a second testing cavity, the first testing cavity is at least provided with a first through hole communicated with the inner cavity, and the first through hole is communicated with a testing gas pipeline; the second test cavity is at least provided with a second through hole and a third through hole, the second through hole is communicated with the first gas carrying pipeline, the third through hole is communicated with the first input port of the flow mixing device, the second input port of the flow mixing device is communicated with the second gas carrying pipeline, the output port of the flow mixing device is communicated with the gas sensing element, and the second gas carrying pipeline is at least provided with a valve; the utility model discloses can enlarge the test range of gas transmission rate tester on the basis that does not change gaseous sensing element precision, the whole cost that is unlikely to make gas transmission rate tester again simultaneously is too high.
Description
Technical Field
The utility model relates to a gas permeation test technical field, in particular to enlarge system and tester of test range of gas transmissivity tester.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The packaging material gas permeability tester is internally provided with one or more gas sensing elements which can test the permeability of various gases such as oxygen, water vapor and the like. The gas sensor incorporated in the packaging material gas permeability tester usually calculates the permeability by detecting the content of the gas to be measured in the carrier gas. In order to ensure the testing accuracy, the range of the gas sensing element built in the gas permeability tester is generally very small, which results in the gas permeability tester having higher testing accuracy but smaller testing range.
The inventor finds that in the existing gas transmittance tester, in order to solve the problem of high test precision but small range, a plurality of gas sensing elements with different ranges are arranged in the tester, so that the tester can ensure the test precision and has a large test range, but the gas sensing elements with different ranges need to be frequently switched in the test, the test efficiency of the tester is reduced, and the cost is increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model provides a system and tester for enlarging the test range of gas transmittance tester can enlarge the test range of gas transmittance tester on the basis that does not change the precision of gas sensing element, and the whole cost of unlikely gas transmittance tester of making is too high simultaneously again.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses the first aspect provides a system for enlarge test range of gas transmissivity tester.
A system for extending the test range of a gas transmission rate tester, comprising: a first test chamber and a second test chamber;
a sample is placed between the inner cavity opening of the first testing cavity and the inner cavity of the second testing cavity, the first testing cavity is at least provided with a first through hole communicated with the inner cavity, and the first through hole is communicated with a test gas pipeline;
the second test cavity is at least provided with a second through hole and a third through hole, the second through hole is communicated with the first gas carrying pipeline, the third through hole is communicated with the first input port of the flow mixing device, the second input port of the flow mixing device is communicated with the second gas carrying pipeline, the output port of the flow mixing device is communicated with the gas sensing element, and the second gas carrying pipeline is at least provided with a valve.
Furthermore, the device also comprises a tested gas supply device, and the first through hole is communicated with the tested gas supply device through a test gas pipeline.
Further, the output end of the gas sensing element is communicated with the first flowmeter.
Furthermore, the first test cavity is provided with a fourth through hole communicated with the inner cavity and used for emptying.
Furthermore, at least one third flow control valve is arranged on the test gas pipeline; or at least one third flow control valve and at least one third stop valve are arranged on the test gas pipeline; or at least one third stop valve is arranged on the test gas pipeline.
In a first implementation:
the system also comprises a carrier gas supply device, the second through hole is communicated with the carrier gas supply device through a first carrier gas pipeline, and at least one first flow controller is arranged on the first carrier gas pipeline;
the second input port of the flow mixing device is communicated with the carrier gas supply device through a second carrier gas pipeline, a second flow controller and a second flow meter are arranged on the second carrier gas pipeline, and a valve on the second carrier gas pipeline is a first stop valve.
In a second implementation:
on the basis of the first implementation mode, the second air carrying pipeline is communicated with the exhaust pipeline, and the exhaust pipeline is provided with a second stop valve.
In a third implementation:
the system also comprises a carrier gas supply device, a second input port of the mixed flow device is communicated with the carrier gas supply device through a second carrier gas pipeline, a second flow controller, a second flow meter and a three-way valve are arranged on the second carrier gas pipeline, an output port of the second flow meter is communicated with a first port of the three-way valve, a second port of the three-way valve is communicated with the second input port of the mixed flow device, and a third port of the three-way valve is communicated with an exhaust pipeline.
The utility model discloses the second aspect provides a gas transmission rate tester, include the first aspect the system of test range of expanding gas transmission rate tester.
Compared with the prior art, the beneficial effects of the utility model are that:
1. enlarge system and tester of test range of gas transmissivity tester, can enlarge the test range of gas transmissivity tester on the basis that does not change the gas sensing element precision, the whole cost that is unlikely to make gas transmissivity tester again simultaneously is too high.
2. Enlarge system and tester of test range of gas transmissivity tester, can enlarge the test range of gas transmissivity tester under the condition that does not change gas sensing element range and precision, do not reduce the measuring accuracy again simultaneously.
3. Enlarge system and tester of test range of gas transmissivity tester, can enlarge the test range of tester, can improve efficiency of software testing simultaneously again, can realize the multiple sample test of different ranges under the prerequisite that does not increase sensing element quantity, practiced thrift the cost.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to constitute a limitation on the invention.
Fig. 1 is a schematic view of a system for expanding a test range of a gas transmittance tester according to embodiment 1 of the present invention.
Fig. 2 is a schematic view of a system for expanding a test range of a gas transmittance tester according to embodiment 2 of the present invention.
Fig. 3 is a schematic view of a system for expanding a test range of a gas transmittance tester according to embodiment 3 of the present invention.
Wherein, 1, a gas supply device to be detected; 2. a carrier gas supply device; 3. a first test chamber; 4. a sample; 5. a second test chamber; 6. a flow mixing device; 7. a gas sensing element; 8. a first flow meter; 9. a first flow controller; 10. a second flow controller; 11. a second flow meter; 12. a first shut-off valve; 13. a second stop valve; 14. and a three-way valve.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the case of conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.
Example 1:
as shown in fig. 1, embodiment 1 of the present invention provides a system for expanding a test range of a gas transmittance tester, including: a first test chamber 3 and a second test chamber 5;
a sample 4 is placed between the inner cavity opening of the first testing cavity 3 and the inner cavity of the second testing cavity 5, the first testing cavity 3 is at least provided with a first through hole communicated with the inner cavity, and the first through hole is communicated with a test gas pipeline;
the second testing cavity 5 is at least provided with a second through hole and a third through hole, the second through hole is communicated with the first carrier gas pipeline, the third through hole is communicated with the first input port of the flow mixing device 6, the second input port of the flow mixing device 6 is communicated with the second carrier gas pipeline, and the output port of the flow mixing device 6 is communicated with the gas sensing element 7.
Optionally, the system further includes a measured gas supply device 1 (it is understood that the measured gas supply device 1 may be an external part not included in the system, or may be a part included in the system, and those skilled in the art may combine the parts according to specific conditions), and the first through hole is communicated with the measured gas supply device 1 through a test gas pipeline.
In the present embodiment, the output end of the gas sensor element 7 communicates with the first flow meter 8.
Optionally, the system further includes a carrier gas supply device 2 (it is understood that the carrier gas supply device 2 may be an external part not included in the system, or may be a part included in the system, and those skilled in the art may make combinations according to specific working conditions), and the second through hole is communicated with the carrier gas supply device 2 through a first carrier gas pipeline, and the first carrier gas pipeline is provided with at least one first flow controller 9.
In this embodiment, a second input port of the flow mixing device 6 is communicated with the carrier gas supply device 2 through a second carrier gas pipeline, a second flow controller 10 and a second flow meter 11 are arranged on the second carrier gas pipeline, a valve on the second carrier gas pipeline is a first stop valve 12, an input port of the second flow controller 10 is communicated with the carrier gas supply device 2, an output port of the second flow controller 10 is communicated with an input port of the second flow meter 11, an output port of the second flow meter 11 is communicated with an input port of the first stop valve 12, and an output port of the first stop valve 12 is communicated with a second input port of the flow mixing device 6.
In this embodiment, the first testing chamber 3 is provided with a fourth through hole for evacuation, which is communicated with the inner cavity.
It is understood that in other embodiments, the number of the first through holes, the second through holes, the third through holes and the fourth through holes is not limited to one, and may be multiple, as long as the corresponding through hole function is achieved, for example, multiple first through holes may be simultaneously used for introducing the test gas, multiple fourth through holes may be simultaneously used for exhausting, multiple second through holes are simultaneously used for introducing the carrier gas, and multiple third through holes are simultaneously used for discharging the mixed gas; the design can be carried out by those skilled in the art according to specific working conditions, and the detailed description is omitted here.
In this embodiment, the corresponding inner cavity openings of the first testing cavity 3 and the second testing cavity 5 face the sample 4, and the sample completely covers the inner cavity openings of the first testing cavity 3 and the second testing cavity 5, and the first testing cavity 3 and the second testing cavity 5 may also be provided with one or more continuous or spaced annular sealing members around the respective inner cavity openings;
it will be appreciated that in other embodiments, at least one third flow control valve is provided in the test gas line; or at least one third flow control valve and at least one third stop valve are arranged on the test gas pipeline; or, at least one third stop valve is disposed on the test gas pipeline, and a person skilled in the art can select the third stop valve according to specific working conditions, which is not described herein again.
The stop valve in this embodiment can be manual, electronic or pneumatic on-off control valve, and the skilled person in the art can select according to specific operating mode as long as can realize on-off control can, and this no longer gives unnecessary details.
In this embodiment, each flow controller may be a mass flow controller controlled manually or automatically, or a device for controlling the gas flow, such as a needle valve or a proportional valve, which may be selected by a person skilled in the art according to a specific working condition, and is not described herein again.
In this embodiment, the flow mixing device 6 may have more input and output ports, and those skilled in the art may select the input and output ports according to specific working conditions, which are not described herein again.
In this embodiment, the flow mixing device 6 may be a three-way joint, a three-way valve, or other devices for mixing gas, as long as it has a corresponding ventilation interface and a corresponding flow mixing cavity, and those skilled in the art can select the flow mixing device according to specific working conditions, which are not described herein again.
The working principle of the system in this embodiment includes:
the tested gas enters the inner cavity of the first testing cavity 3 from the tested gas supply device 1 through the pipeline and the first through hole in the first testing cavity 3, part of the tested gas permeates into the inner cavity of the second testing cavity 5 through the sample 4, and the rest of the tested gas is exhausted through the fourth through hole in the first testing cavity 3.
The pipeline of the carrier gas is divided into two paths, wherein one path of carrier gas flows through the first flow controller 9 from the carrier gas supply device 2 through the pipeline, under the control of the first flow controller 9, the carrier gas with a certain flow enters the inner cavity of the second testing cavity 5 from the second through hole of the second testing cavity 5 through the pipeline, and is mixed with the gas to be tested which permeates through the sample 4 to form mixed gas, and the mixed gas enters the mixed flow device 6 through the pipeline from the third through hole of the second testing cavity 5;
the other path of carrier gas flows through a second flow controller 10 through a pipeline by a carrier gas supply device 2, and under the control of the second flow controller 10, the carrier gas with a certain flow rate flows through a second flow meter 11 through a pipeline and then enters the inlet of a first stop valve 12 through a pipeline;
when the range expansion test is carried out, the first stop valve 12 is opened, and carrier gas with a certain flow enters the mixed flow device 6 through the first stop valve 12 and is mixed with mixed gas, so that the concentration of the measured gas is reduced to the range of the gas sensing element 7;
the secondarily mixed gas flows into the gas sensing element 7 from the outlet of the mixing device 6 through a pipeline, then flows into the first flowmeter 8 from the outlet of the gas sensing element 7 through a pipeline, and then is exhausted through a pipeline.
The gas sensing element 7 tests the content of the gas to be tested in the secondary mixed gas, the first flowmeter 8 tests the total flow of the secondary mixed gas, the second flowmeter 11 tests the flow of the second carrier gas, the difference value of the two is the actual flow passing through the second testing cavity 5, and the concentration of the gas to be tested can be calculated according to the proportional relation of the flows and the gas content tested by the gas sensing element 7.
Two specific cases are given below:
case one:
assuming that the range of the gas sensing element 7 is 0-200ppm, the flow rate of the mixture of the carrier gas flowing out of the third through hole of the second testing chamber 5 and the gas to be tested is 10ml/min, the concentration of the gas to be tested is 300ppm, and the range of the gas sensing element 7 is exceeded, so that direct measurement cannot be carried out; the other path of carrier gas passes through a second flow rate controller 10, the flow rate is 10ml/min, and the gas is pure carrier gas;
after the two paths of gas enter the flow mixing device 6 to be mixed, the flow rate is about 20ml/min, the concentration of the gas to be measured is about 150ppm, and the gas can be directly measured by the gas sensing element 7.
Case two:
assuming that the range of the gas sensing element 7 is 0-500ppm, the flow rate of the mixture of the carrier gas flowing out of the third through hole of the second test cavity 5 and the gas to be tested is 10ml/min, the concentration of the gas to be tested is 3000ppm, which exceeds the range of the gas sensing element 7 and cannot be directly measured; the other path of carrier gas passes through a second flow rate controller 10, the flow rate is 90ml/min, and the gas is pure carrier gas;
after the two paths of gas enter the flow mixing device 6 to be mixed, the flow rate is about 100ml/min, the concentration of the gas to be measured is about 300ppm, and the gas can be directly measured by the gas sensing element 7.
Example 2:
as shown in fig. 2, embodiment 2 of the present invention provides a system for expanding a test range of a gas transmittance tester, including: a first test chamber 3 and a second test chamber 5;
a sample 4 is placed between the inner cavity opening of the first testing cavity 3 and the inner cavity of the second testing cavity 5, the first testing cavity 3 is at least provided with a first through hole communicated with the inner cavity, and the first through hole is communicated with a test gas pipeline;
the second testing cavity 5 is at least provided with a second through hole and a third through hole, the second through hole is communicated with the first gas carrying pipeline, the third through hole is communicated with a first input port of the flow mixing device 6, a second input port of the flow mixing device 6 is communicated with the second gas carrying pipeline, an output port of the flow mixing device 6 is communicated with the gas sensing element 7, and the second gas carrying pipeline is at least provided with a valve.
Optionally, the system further includes a measured gas supply device 1 (it is understood that the measured gas supply device 1 may be an external part not included in the system, or may be a part included in the system, and those skilled in the art may combine the parts according to specific conditions), and the first through hole is communicated with the measured gas supply device 1 through a test gas pipeline.
In the present embodiment, the output end of the gas sensor element 7 communicates with the first flow meter 8.
The system further comprises a carrier gas supply device 2 (it is understood that the carrier gas supply device 2 may be an external part not included in the system, or a part included in the system, and those skilled in the art may combine the parts according to specific working conditions), the second through hole is communicated with the carrier gas supply device 2 through a first carrier gas pipeline, and at least one first flow controller 9 is arranged on the first carrier gas pipeline.
In this embodiment, a second input port of the flow mixing device 6 is communicated with the carrier gas supply device 2 through a second carrier gas pipeline, a second flow controller 10 and a second flow meter 11 are arranged on the second carrier gas pipeline, a valve on the second carrier gas pipeline is a first stop valve 12, an input port of the second flow controller 10 is communicated with the carrier gas supply device 2, an output port of the second flow controller 10 is communicated with an input port of the second flow meter 11, an output port of the second flow meter 11 is communicated with an input port of the first stop valve 12, and an output port of the first stop valve 12 is communicated with a second input port of the flow mixing device 6.
In this embodiment, the first testing chamber is provided with a fourth through hole for evacuation, which is communicated with the inner cavity.
It is understood that in other embodiments, the number of the first through holes, the second through holes, the third through holes and the fourth through holes is not limited to one, and may be multiple, as long as the corresponding through hole function is achieved, for example, multiple first through holes may be simultaneously used for introducing the test gas, multiple fourth through holes may be simultaneously used for exhausting, multiple second through holes are simultaneously used for introducing the carrier gas, and multiple third through holes are simultaneously used for discharging the mixed gas; the design can be carried out by those skilled in the art according to specific working conditions, and the detailed description is omitted here.
In this embodiment, the second carrier gas pipeline is communicated with the exhaust pipeline, and the exhaust pipeline is provided with a second stop valve 13.
The working principle of the system in this embodiment includes:
the tested gas enters the inner cavity of the first testing cavity 3 from the tested gas supply device 1 through the pipeline and the first through hole in the first testing cavity 3, part of the tested gas permeates into the inner cavity of the second testing cavity 5 through the sample 4, and the rest of the tested gas is exhausted through the fourth through hole in the first testing cavity 3.
The pipeline of the carrier gas is divided into two paths, wherein one path of carrier gas flows through the first flow controller 9 from the carrier gas supply device 2 through the pipeline, under the control of the first flow controller 9, the carrier gas with a certain flow enters the inner cavity of the second testing cavity 5 from the second through hole of the second testing cavity 5 through the pipeline, and is mixed with the gas to be tested which permeates through the sample 4 to form mixed gas, and the mixed gas enters the mixed flow device 6 through the pipeline from the third through hole of the second testing cavity 5;
the other path of carrier gas flows through a second flow controller 10 through a pipeline by a carrier gas supply device 2, and under the control of the second flow controller 10, the carrier gas with a certain flow rate flows through a second flow meter 11 through a pipeline and then enters the inlet of a first stop valve 12 through a pipeline;
when the range expansion test is carried out, the second stop valve 13 is opened, the carrier gas flows in the pipeline, so that the carrier gas in the pipeline is purer when entering the mixing device 6, then the second stop valve 13 is closed, the first stop valve 12 is opened, the carrier gas with a certain flow rate flows through the first stop valve 12 to enter the mixed flow device 6 and is mixed with the mixed gas, and the concentration of the gas to be tested is reduced to the range of the gas sensing element 7.
The secondarily mixed gas flows into the gas sensing element 7 from the outlet of the mixing device 6 through a pipeline, then flows into the first flowmeter 8 from the outlet of the gas sensing element 7 through a pipeline, and then is exhausted through a pipeline.
The gas sensing element 7 tests the content of the gas to be tested in the secondary mixed gas, the first flowmeter 8 tests the total flow of the secondary mixed gas, the second flowmeter 11 tests the flow of the second channel of carrier gas, the difference value of the two is the actual flow passing through the second testing cavity 5, and the concentration of the gas to be tested can be calculated according to the proportional relation of the flows and the gas content tested by the gas sensing element 7.
In this embodiment, the corresponding inner cavity openings of the first testing cavity 3 and the second testing cavity 5 face the sample 4, and the sample completely covers the inner cavity openings of the first testing cavity 3 and the second testing cavity 5, and the first testing cavity 3 and the second testing cavity 5 may also be provided with one or more continuous or spaced annular sealing members around the respective inner cavity openings;
it will be appreciated that in other embodiments, at least one third flow control valve is provided in the test gas line; or at least one third flow control valve and at least one third stop valve are arranged on the test gas pipeline; or, at least one third stop valve is disposed on the test gas pipeline, and a person skilled in the art can select the third stop valve according to specific working conditions, which is not described herein again.
The stop valve in this embodiment can be manual, electronic or pneumatic on-off control valve, and the skilled person in the art can select according to specific operating mode as long as can realize on-off control can, and this no longer gives unnecessary details.
In this embodiment, each flow controller may be a mass flow controller controlled manually or automatically, or a device for controlling the gas flow, such as a needle valve and a proportional valve, which may be selected by a person skilled in the art according to a specific working condition and will not be described herein again.
In this embodiment, the flow mixing device 6 may have more input and output ports, and those skilled in the art may select the input and output ports according to specific working conditions, which are not described herein again.
In this embodiment, the flow mixing device 6 may be a three-way joint, a three-way valve, or other device for mixing gas, as long as it has a corresponding ventilation interface and a corresponding flow mixing inner cavity, and those skilled in the art can select the flow mixing device according to specific working conditions, and details are not described here.
Example 3:
as shown in fig. 3, embodiment 3 of the present invention provides a system for expanding a test range of a gas transmittance tester, including: a first test chamber 3 and a second test chamber 5;
a sample 4 is placed between the inner cavity opening of the first testing cavity 3 and the inner cavity of the second testing cavity 5, the first testing cavity 3 is at least provided with a first through hole communicated with the inner cavity, and the first through hole is communicated with a test gas pipeline;
the second testing cavity 5 is at least provided with a second through hole and a third through hole, the second through hole is communicated with the first gas carrying pipeline, the third through hole is communicated with a first input port of the flow mixing device 6, a second input port of the flow mixing device 6 is communicated with the second gas carrying pipeline, and an output port of the flow mixing device 6 is communicated with the gas sensing element 7.
The system also comprises a tested gas supply device 1 (it can be understood that the tested gas supply device 1 can be an external part which is not included in the system, or a part which is included in the system, and a person skilled in the art can combine the tested gas supply device 1 with the tested gas supply device 1 according to specific working conditions), and the first through hole is communicated with the tested gas supply device 1 through a test gas pipeline.
In the present embodiment, the output end of the gas sensor element 7 communicates with the first flow meter 8.
Optionally, the system further includes a carrier gas supply device 2 (it is understood that the carrier gas supply device 2 may be an external part not included in the system, or may be a part included in the system, and a person skilled in the art may combine the parts according to specific working conditions), and the second through hole is communicated with the carrier gas supply device 2 through a first carrier gas pipeline, and the first carrier gas pipeline is provided with at least one first flow controller 9.
In this embodiment, a second input port of the flow mixing device 6 is communicated with the carrier gas supply device 2 through a second carrier gas pipeline, a second flow controller 10, a second flow meter 11 and a three-way valve 14 are arranged on the second carrier gas pipeline, an input port of the second flow controller 10 is communicated with the carrier gas supply device 2, an output port of the second flow controller 10 is communicated with an input port of the second flow meter 11, an output port of the second flow meter 11 is communicated with a first port of the three-way valve 14, a second port of the three-way valve 14 is communicated with a second input port of the flow mixing device 6, and a third port of the three-way valve 14 is communicated with an exhaust pipeline.
In this embodiment, the first testing chamber is provided with a fourth through hole for evacuation, which is communicated with the inner cavity.
It is understood that in other embodiments, the number of the first through holes, the second through holes, the third through holes and the fourth through holes is not limited to one, and may be multiple, as long as the corresponding through hole function is achieved, for example, multiple first through holes may be simultaneously used for introducing the test gas, multiple fourth through holes may be simultaneously used for exhausting, multiple second through holes are simultaneously used for introducing the carrier gas, and multiple third through holes are simultaneously used for discharging the mixed gas; the design can be carried out by those skilled in the art according to specific working conditions, and the detailed description is omitted here.
In this embodiment, the corresponding inner cavity openings of the first testing cavity 3 and the second testing cavity 5 face the sample 4, and the sample completely covers the inner cavity openings of the first testing cavity 3 and the second testing cavity 5, and the first testing cavity 3 and the second testing cavity 5 may also be provided with one or more continuous or spaced annular sealing members around the respective inner cavity openings;
it will be appreciated that in other embodiments, at least one third flow control valve is provided on the test gas line; or at least one third flow control valve and at least one third stop valve are arranged on the test gas pipeline; or at least one third stop valve is arranged on the test gas pipeline; wherein, the stop valve can be manual, electronic or pneumatic on-off control valve, and the skilled person in the art can select according to specific operating mode, as long as can realize on-off control can, and it is no longer repeated here.
In this embodiment, each flow controller may be a mass flow controller controlled manually or automatically, or a device for controlling the gas flow, such as a needle valve and a proportional valve, which may be selected by a person skilled in the art according to a specific working condition and will not be described herein again.
In this embodiment, the flow mixing device 6 may have more input and output ports, and those skilled in the art may select the input and output ports according to specific working conditions, which are not described herein again.
In this embodiment, the flow mixing device 6 may be a three-way joint, a three-way valve, or other device for mixing gas, as long as it has a corresponding ventilation interface and a corresponding flow mixing inner cavity, and those skilled in the art can select the flow mixing device according to specific working conditions, and details are not described here.
In this embodiment, the three-way valve may be a three-way valve controlled manually, electrically, or pneumatically, and the like for switching the gas flow direction, and those skilled in the art may select the three-way valve according to specific working conditions, which is not described herein again.
The working principle of the system in this embodiment includes:
the tested gas enters the inner cavity of the first testing cavity 3 from the tested gas supply device 1 through the pipeline and the first through hole in the first testing cavity 3, part of the tested gas permeates into the inner cavity of the second testing cavity 5 through the sample 4, and the rest of the tested gas is exhausted through the fourth through hole in the first testing cavity 3.
The pipeline of the carrier gas is divided into two paths, wherein one path of carrier gas flows through the first flow controller 9 from the carrier gas supply device 2 through the pipeline, under the control of the first flow controller 9, the carrier gas with a certain flow enters the inner cavity of the second testing cavity 5 from the second through hole of the second testing cavity 5 through the pipeline, and is mixed with the gas to be tested which permeates through the sample 4 to form mixed gas, and the mixed gas enters the mixed flow device 6 through the pipeline from the third through hole of the second testing cavity 5;
the other path of carrier gas flows through a second flow controller 10 through a pipeline by a carrier gas supply device 2, and under the control of the second flow controller 10, the carrier gas with a certain flow rate flows through a second flow meter 11 through a pipeline and then enters the inlet of the first port of the three-way valve through a pipeline;
when the range expansion test is carried out, the first port and the third port of the three-way valve 14 are opened, carrier gas flows in the pipeline, so that the carrier gas in the pipeline is purer when entering the mixing device 6, then the third port of the three-way valve 14 is closed, the second port of the three-way valve 14 is opened, the carrier gas with a certain flow rate flows through the second port of the three-way valve 14 to enter the mixed flow device 6 and is mixed with mixed gas, and the concentration of the measured gas is reduced to the range of the gas sensing element 7.
The secondarily mixed gas flows into the gas sensing element 7 from the outlet of the mixing device 6 through a pipeline, then flows into the first flowmeter 8 from the outlet of the gas sensing element 7 through a pipeline, and then is exhausted through a pipeline.
The gas sensing element 7 tests the content of the gas to be tested in the secondary mixed gas, the first flowmeter 8 tests the total flow of the secondary mixed gas, the second flowmeter 11 tests the flow of the second carrier gas, the difference value of the two is the actual flow passing through the second testing cavity 5, and the concentration of the gas to be tested can be calculated according to the proportional relation of the flows and the gas content tested by the gas sensing element 7.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A system for expanding the test range of a gas permeability tester is characterized in that:
the method comprises the following steps: the device comprises a first test cavity and a second test cavity;
a sample is placed between the inner cavity opening of the first testing cavity and the inner cavity of the second testing cavity, the first testing cavity is at least provided with a first through hole communicated with the inner cavity, and the first through hole is communicated with a test gas pipeline;
the second test cavity is at least provided with a second through hole and a third through hole, the second through hole is communicated with the first gas carrying pipeline, the third through hole is communicated with the first input port of the flow mixing device, the second input port of the flow mixing device is communicated with the second gas carrying pipeline, the output port of the flow mixing device is communicated with the gas sensing element, and the second gas carrying pipeline is at least provided with a valve.
2. The system for extending the test range of a gas transmission rate tester as recited in claim 1, wherein:
still including being surveyed gas supply device, first through-hole passes through experimental gas pipeline and is surveyed gas supply device intercommunication.
3. The system for extending the test range of a gas transmission rate tester as recited in claim 1, wherein:
the output end of the gas sensing element is communicated with the first flowmeter.
4. The system for extending the test range of a gas transmission rate tester as recited in claim 1, wherein:
the second through hole is communicated with the carrier gas supply device through a first carrier gas pipeline, and at least one first flow controller is arranged on the first carrier gas pipeline.
5. The system for extending the test range of a gas transmission rate tester as recited in claim 1, wherein:
the first test cavity is provided with a fourth through hole communicated with the inner cavity and used for emptying.
6. The system for extending the test range of a gas transmission rate tester as claimed in any one of claims 1 to 5, wherein:
the test gas pipeline is provided with at least one third flow control valve; or at least one third flow control valve and at least one third stop valve are arranged on the test gas pipeline; or at least one third stop valve is arranged on the test gas pipeline.
7. The system for extending the test range of a gas transmission rate tester as claimed in any one of claims 1 to 5, wherein:
the second input port of the flow mixing device is communicated with the carrier gas supply device through a second carrier gas pipeline, a second flow controller and a second flow meter are arranged on the second carrier gas pipeline, and a valve on the second carrier gas pipeline is a first stop valve.
8. The system for extending the test range of a gas transmission rate tester as recited in claim 7, wherein:
the second carrier gas pipeline is communicated with the exhaust pipeline, and the exhaust pipeline is provided with a second stop valve.
9. The system for extending the test range of a gas transmission rate tester as claimed in any one of claims 1 to 5, wherein:
the second input port of the flow mixing device is communicated with the carrier gas supply device through a second carrier gas pipeline, a second flow controller, a second flow meter and a three-way valve are arranged on the second carrier gas pipeline, the output port of the second flow meter is communicated with the first port of the three-way valve, the second port of the three-way valve is communicated with the second input port of the flow mixing device, and the third port of the three-way valve is communicated with the exhaust pipeline.
10. A gas permeability tester is characterized in that: a system for extending the test range of a gas transmission rate tester comprising the system of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222325822.XU CN218412194U (en) | 2022-08-31 | 2022-08-31 | System for expanding testing range of gas transmittance tester and tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222325822.XU CN218412194U (en) | 2022-08-31 | 2022-08-31 | System for expanding testing range of gas transmittance tester and tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218412194U true CN218412194U (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222325822.XU Active CN218412194U (en) | 2022-08-31 | 2022-08-31 | System for expanding testing range of gas transmittance tester and tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218412194U (en) |
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2022
- 2022-08-31 CN CN202222325822.XU patent/CN218412194U/en active Active
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