CN114486672A - Variable-area gas permeation cell structure, gas permeation tester and operation method - Google Patents
Variable-area gas permeation cell structure, gas permeation tester and operation method Download PDFInfo
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- CN114486672A CN114486672A CN202111639232.8A CN202111639232A CN114486672A CN 114486672 A CN114486672 A CN 114486672A CN 202111639232 A CN202111639232 A CN 202111639232A CN 114486672 A CN114486672 A CN 114486672A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 166
- 238000007789 sealing Methods 0.000 claims description 27
- 238000010586 diagram Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
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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
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Abstract
The invention provides a variable-area gas permeation cell structure, a gas permeation tester and an operation method, wherein the gas permeation cell structure comprises the following components: the test device comprises a first test cavity and a second test cavity, wherein the first test cavity is provided with a first groove, the second test cavity is provided with a second groove, and the opening of the first groove is opposite to the opening of the second groove; a sample supporting piece is arranged in the second groove, and a sample is placed between the sample supporting piece and the opening of the first groove; the test system further comprises a first seal for placing between the first test chamber and the test specimen and a second seal for placing between the test specimen support and the second test chamber; the invention can conveniently change the test area and meet the test requirements of customers on samples with different test areas.
Description
Technical Field
The invention relates to the technical field of gas permeation testing, in particular to a gas permeation cell structure with a variable area, a gas permeation tester and an operation method.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
When a gas permeation test is performed, a gas permeation rate test system is used, and one of core components of the gas permeation rate test system is a gas permeation cell. For example, chinese patent CN202011049632.9 discloses a multi-cavity testing structure, system and method for membrane permeation detection, which includes at least one set of testing units, each set of testing unit includes two symmetrically disposed testing cavities, and each testing cavity is equivalent to a gas permeation cell.
The common gas permeation cell structure is divided into a first testing cavity and a second testing cavity, and each testing cavity is provided with a fixed testing area.
The inventor finds that a user may have a requirement for changing the test area during actual test, but the first test cavity and the second test cavity are connected with complex pipelines and lines, so that the two test cavities are very difficult to disassemble and replace, and the current gas permeation pool structure is difficult to meet the requirement for changing the test area of the user; in addition, the vent holes of the common gas permeation cells are generally in a straight hole structure, which can cause an airflow dead zone to be formed in a region far away from the vent holes, and only the test gas near the vent holes enters the vent holes, thereby affecting the test accuracy of the gas permeation cells.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a variable-area gas permeation cell structure, a gas permeation tester and an operation method, which can conveniently replace the test area and meet the test requirements of customers on samples with different test areas.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a variable area gas permeation cell structure.
A variable area gas permeation cell structure comprising: the test device comprises a first test cavity and a second test cavity, wherein the first test cavity is provided with a first groove, the second test cavity is provided with a second groove, and the opening of the first groove is opposite to the opening of the second groove;
a sample supporting piece is arranged in the second groove, and a sample is placed between the sample supporting piece and the opening of the first groove;
also included is a first seal for placement between the first test chamber and the test specimen and a second seal for placement between the test specimen support and the second test chamber.
Furthermore, the first test cavity is provided with at least one air path communicated with the first groove, and the position of the air path close to the first groove is of a flow guide structure.
Furthermore, the second test cavity is provided with at least one air path communicated with the second groove, and the position of the air path close to the second groove is of a flow guide structure.
Furthermore, a flow guide structure is arranged on the sample support piece.
Furthermore, the flow guide structure is a conical or stepped structure with gradually increased sectional area.
In a second aspect of the invention, a method of operating a variable area gas permeation cell structure is provided, in which a test area is changed by changing a sample support and a first test chamber using the variable area gas permeation cell structure of the first aspect of the invention.
A third aspect of the present invention provides a variable area gas permeation cell structure comprising: the test device comprises a first test cavity and a second test cavity, wherein the first test cavity is provided with a first groove, the second test cavity is provided with a second groove, and the opening of the first groove is opposite to the opening of the second groove;
a sample supporting piece is arranged in the second groove, and a sample is placed between the sample supporting piece and the opening of the first groove;
the test device further comprises a test sample pressing piece arranged between the first test cavity and the test sample, a first sealing piece used for being placed between the first test cavity and the test sample pressing piece, and a second sealing piece used for being placed between the test sample supporting piece and the second test cavity.
Furthermore, the first test cavity is provided with at least one air path communicated with the first groove, and the position of the air path close to the first groove is of a flow guide structure.
Furthermore, the second test cavity is provided with at least one air path communicated with the second groove, and the position of the air path close to the second groove is of a flow guide structure.
Furthermore, a flow guide structure is arranged on the sample support piece.
Furthermore, the flow guide structure is a conical or stepped structure with gradually increased sectional area.
Further, the test piece device further comprises a third sealing member arranged between the test piece pressing member and the test piece.
In a fourth aspect of the present invention, there is provided a method of operating a variable-area gas permeation cell structure, in which a test area is changed by changing a sample support member and a sample pressing member, by using the variable-area gas permeation cell structure according to the third aspect of the present invention.
A fifth aspect of the invention provides a gas permeation testing apparatus comprising a variable area gas permeation cell structure according to the first or third aspect of the invention; alternatively, the working method according to the second or fourth aspect is used.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the area-variable gas permeation cell structure, the gas permeation tester and the operation method, the test area of the sample is changed by replacing the sample supporting piece with different test areas, so that the flexible change of the test area is realized, and the test requirements of customers on the samples with different test areas are met.
2. According to the variable-area gas permeation cell structure, the gas permeation tester and the operation method, the diversion structure is arranged at the position, close to the groove of the test cavity, of the gas path of the test cavity, so that the gas permeation cell can collect test gas to the maximum extent to improve the test precision.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic diagram of a variable-area gas permeation cell structure provided in example 1 of the present invention.
Fig. 2 is a schematic diagram of a variable-area gas permeation cell structure provided in example 4 of the present invention.
Fig. 3 is a schematic diagram of a second test chamber structure with variable area provided in embodiments 1 and 4 of the present invention.
Fig. 4 is a schematic structural diagram of a sample support provided in examples 1 and 4 of the present invention.
The device comprises a first test cavity and a second test cavity, wherein 1 the first test cavity is; 2. a first vent hole; 3. a first seal member; 4. a sample; 5. a second test chamber; 6. a second vent hole; 7. a sample support; 8. a second seal member; 9. a sample pressing member; 10. a third seal.
Detailed Description
The invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. 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.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Example 1:
as shown in fig. 1, 3 and 4, embodiment 1 of the present invention provides a variable-area gas permeation cell structure, including: comprising a first test chamber 1 and a second test chamber 5.
The first testing chamber 1 and the second testing chamber 5 of the gas permeation cell of the present embodiment are both provided with corresponding grooves, including the first groove of the first testing chamber 1 and the second groove of the second testing chamber 5.
The first testing cavity 1 is provided with at least one first vent hole 2 (the first vent hole 2 extends out of the first testing cavity 1 through the air path), one end of the first vent hole 2 is communicated with the first groove, and a conical or step-shaped gradually-increasing flow guide structure is further arranged at the joint of the first vent hole 2 and the first groove, so that the gas diffusion efficiency is improved, and the testing precision is improved.
Similarly, the second testing cavity 5 is also provided with at least one second vent hole 6 (the second vent hole 6 extends out of the first testing cavity 1 through the air path), one end of the second vent hole 6 is communicated with the second groove, and a flow guide structure which is tapered or stepped and gradually increased is further arranged at the joint of the second vent hole 6 and the second groove, so that the gas diffusion efficiency is improved, and the testing precision is improved.
A sample support 7 and a sample 4 are also arranged between the first test chamber 1 and the second test chamber 5.
Specifically, the sample support 7 is placed in a second groove of the second testing chamber 5, a second sealing member 8 is further disposed between the sample support 7 and the second testing chamber 5, and the second sealing member 8 is mounted in a second sealing member groove provided on the sample support 7.
The second sealing element 8 is used for sealing between the second testing cavity 5 and the sample supporting element 7, and the sample supporting element 7 is further provided with a flow guide structure, so that tested gas penetrating through a sample can be diffused into a second groove of the second testing cavity 5 more quickly.
A test sample 4 is arranged between the test sample support 7 and the first test cavity 1, a first sealing element 3 is further arranged between the test sample 4 and the first test cavity 1, the first sealing element 3 is installed in a first sealing element groove formed in the first test cavity 1, and the first sealing element 3 is used for sealing between the test sample 4 and the first test cavity 1.
Example 2:
Example 3:
Example 4:
as shown in fig. 2, 3 and 4, embodiment 4 of the present invention provides a variable-area gas permeation cell structure, including: comprising a first test chamber 1 and a second test chamber 5.
The first test chamber 1 and the second test chamber 5 of the gas permeation cell of the present embodiment are both provided with corresponding grooves, including a first groove of the first test chamber 1 and a second groove of the second test chamber 5.
The first testing cavity 1 is provided with at least one first vent hole 2 (the first vent hole 2 extends out of the first testing cavity 1 through the air path), one end of the first vent hole 2 is communicated with the first groove, and a conical or step-shaped gradually-increasing flow guide structure is further arranged at the joint of the first vent hole 2 and the first groove, so that the gas diffusion efficiency is improved, and the testing precision is improved.
Similarly, the second testing cavity 5 is also provided with at least one second vent hole 6 (the second vent hole 6 extends out of the first testing cavity 1 through the air path), one end of the second vent hole 6 is communicated with the second groove, and a flow guide structure which is tapered or stepped and gradually increased is further arranged at the joint of the second vent hole 6 and the second groove, so that the gas diffusion efficiency is improved, and the testing precision is improved.
A sample support 7 and a sample 4 are also arranged between the first test chamber 1 and the second test chamber 5.
Specifically, the sample support 7 is placed in a second groove of the second testing chamber 5, a second sealing member 8 is further disposed between the sample support 7 and the second testing chamber 5, and the second sealing member 8 is mounted in a second sealing member groove provided on the sample support 7.
The second sealing element 8 is used for sealing between the second testing cavity 5 and the sample supporting element 7, and the sample supporting element 7 is further provided with a flow guide structure, so that the tested gas which permeates through the sample can be diffused into the second groove of the second testing cavity 5 more quickly.
Still compress tightly 9 including the sample, sample compresses tightly 9 and is located between first test cavity 1 and the sample 4, and sample 4 is located sample and compresses tightly between 9 and the sample support piece 7, and first sealing member 3 is installed in the first sealing member recess that sets up on first test cavity 1, and first sealing member 3 is located between first test cavity 1 and the sample and compresses tightly 9 for it is sealed between first test cavity 1 and the sample compresses tightly 9.
A third sealing member 10 is further arranged between the sample pressing member 9 and the sample 4, and the third sealing member 10 is installed in a third sealing member groove arranged on the sample pressing member 9 and used for sealing between the sample pressing member 9 and the sample 4.
Example 5:
Example 6:
embodiment 6 of the present invention provides a gas permeation tester, including at least one gas permeation cell structure of variable area described in embodiment 4; alternatively, the working method described in example 5 was used.
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 gas permeation cell structure of variable area which characterized in that:
the method comprises the following steps: the test device comprises a first test cavity and a second test cavity, wherein the first test cavity is provided with a first groove, the second test cavity is provided with a second groove, and the opening of the first groove is opposite to the opening of the second groove;
a sample supporting piece is arranged in the second groove, and a sample is placed between the sample supporting piece and the opening of the first groove;
also included is a first seal for placement between the first test chamber and the test specimen and a second seal for placement between the test specimen support and the second test chamber.
2. The variable area gas permeation cell structure of claim 1, wherein:
the first test cavity is provided with at least one air passage communicated with the first groove, and the position of the air passage close to the first groove is of a flow guide structure;
or,
the second test cavity is provided with at least one air passage communicated with the second groove, and the position of the air passage close to the second groove is of a flow guide structure;
or,
and a flow guide structure is arranged on the sample supporting piece.
3. The variable area gas permeation cell structure of claim 2, wherein:
the flow guide structure is a structure with a conical or step-shaped gradually-increased sectional area.
4. A method of operating a variable area gas permeation cell structure, using a variable area gas permeation cell structure according to any one of claims 1 to 3, to vary the test area by varying the sample support and the first test chamber.
5. A gas permeation cell structure with variable area is characterized in that:
the method comprises the following steps: the test device comprises a first test cavity and a second test cavity, wherein the first test cavity is provided with a first groove, the second test cavity is provided with a second groove, and the opening of the first groove is opposite to the opening of the second groove;
a sample supporting piece is arranged in the second groove, and a sample is placed between the sample supporting piece and the opening of the first groove;
the test device further comprises a test sample pressing piece arranged between the first test cavity and the test sample, a first sealing piece used for being placed between the first test cavity and the test sample pressing piece, and a second sealing piece used for being placed between the test sample supporting piece and the second test cavity.
6. The variable area gas permeation cell structure according to claim 5, wherein:
the first test cavity is provided with at least one air passage communicated with the first groove, and the position of the air passage close to the first groove is of a flow guide structure;
or,
the second test cavity is provided with at least one air passage communicated with the second groove, and the position of the air passage close to the second groove is of a flow guide structure;
or,
and a flow guide structure is arranged on the sample supporting piece.
7. The variable area gas permeation cell structure of claim 6, wherein:
the flow guide structure is a structure with a conical or step-shaped gradually-increased sectional area.
8. The variable area gas permeation cell structure of claim 5, wherein:
and a third seal disposed between the sample pressing member and the sample.
9. A method of operating a variable area gas permeation cell structure, wherein a test area is changed by changing a sample support member and a sample pressing member, using the variable area gas permeation cell structure according to any one of claims 5 to 8.
10. A gas permeation tester is characterized in that: a gas permeation cell structure comprising a variable area according to any one of claims 1 to 3, 5 to 8;
alternatively, the operation method according to claim 4 or 9 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111639232.8A CN114486672A (en) | 2021-12-29 | 2021-12-29 | Variable-area gas permeation cell structure, gas permeation tester and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111639232.8A CN114486672A (en) | 2021-12-29 | 2021-12-29 | Variable-area gas permeation cell structure, gas permeation tester and operation method |
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| Publication Number | Publication Date |
|---|---|
| CN114486672A true CN114486672A (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111639232.8A Pending CN114486672A (en) | 2021-12-29 | 2021-12-29 | Variable-area gas permeation cell structure, gas permeation tester and operation method |
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| CN (1) | CN114486672A (en) |
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- 2021-12-29 CN CN202111639232.8A patent/CN114486672A/en active Pending
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