CN104266952A - Pore diameter detection device of porous material - Google Patents
Pore diameter detection device of porous material Download PDFInfo
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- CN104266952A CN104266952A CN201410520496.5A CN201410520496A CN104266952A CN 104266952 A CN104266952 A CN 104266952A CN 201410520496 A CN201410520496 A CN 201410520496A CN 104266952 A CN104266952 A CN 104266952A
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- porosint
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- porous material
- diameter detection
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Abstract
The invention discloses a pore diameter detection device of a porous material, which is capable of remarkably reducing the consumption of a testing solution. The pore diameter detection device comprises a first member and a second member, wherein the first member is provided with an air cavity and air inlet device for introducing external compressed air into the air cavity, a liquid cavity is arranged on the second member, the first member is connected with the second member by virtue of a butt joint structure and a slit matched with a porous material sample sheet to be tested is formed between the first member and the second member after the first member and the second member are connected, the porous material sample test is butt-clamped and fixed in the slit by means of edge sealing bodies at two sides of the porous material sample sheet, and the air cavity and the liquid cavity are respectively positioned at two sides of the porous material sample sheet and are separated only by means of the porous material sample sheet. During detection, the first member and the porous material sample sheet are not immersed in the testing solution of the liquid cavity any more, thus the liquid storage amount of the liquid cavity is greatly reduced.
Description
Technical field
The present invention relates to a kind of hole diameter detection apparatus of porosint, specifically a kind of device utilizing " bubble tube method " to detect aperture of porous material.
Background technology
" bubble tube method " is a kind of common method detecting aperture of porous material.If publication number is (specifically see embodiment 1, accompanying drawing 2) as described in the Chinese patent literature of CN101435763A, existing a kind of detection method is immersed in completely in the test fluid of tank by the sample cell being provided with porosint coupons, then in sample cell, nitrogen is passed into, nitrogen can produce bubble from porosint coupons to exosmosis thus at the test liquid level of tank under a certain pressure, by the measurements and calculations to correlation parameters such as bubble regime, generation time, gaseous tensions, the corresponding data of aperture of porous material can be drawn.Said method is owing to adopting submergence test mode, and not only device will take larger space, and the use amount of test fluid is also larger.
Summary of the invention
The present invention aims to provide a kind of hole diameter detection apparatus that significantly can reduce the porosint of test fluid use amount.
The hole diameter detection apparatus of porosint of the present invention comprises the first component and second component, described first component is provided with air cavity and the admission gear for external compression gas being introduced this air cavity, described second component is provided with sap cavity, described first component is connected by a docking structure with between second component and between the first component and second component, forms the slit suitable with porosint coupons to be detected after connecting, described porosint coupons schedules described slit via the edge seal being arranged in these porosint coupons both sides to clamping, described air cavity and sap cavity lay respectively at porosint coupons both sides and are only separated by this porosint coupons.Due to the first component be connected by a docking structure between second component and make air cavity and sap cavity lay respectively at porosint coupons both sides and only separated by this porosint coupons, during detection, the first component and porosint coupons are no longer immersed in the test fluid of sap cavity, therefore can greatly reduce the liquid storage amount of sap cavity, the volume of the hole diameter detection apparatus of this porosint also can greatly reduce simultaneously.
As the one more specifically structural design of above-mentioned detection device, described first component is a cup shell, and its glass of groove is described air cavity, and described admission gear is positioned at sidepiece or the bottom of this cup shell; Described second component is a cover unit, and this cover unit has certain thickness, and its top is provided with the groove of up/down perforation to form described sap cavity; The upper surface of described cup groove and the lower surface of groove are respectively equipped with the first packing washer and the second packing washer, and described porosint coupons schedules between the first packing washer and the second packing washer and the center of cup shell, porosint coupons and cover unit be roughly located along the same line to clamping.Above-mentioned design have structure simple, be easy to assembling, the advantage such as easy to use.Wherein, first component docks preferably by internal and external threads adaptation with between second component, such as on cup shell, establish external thread, cover unit establishes internal thread, porosint coupons is pressed between the first packing washer and the second packing washer when screwing by both, facilitates the connection disassembling of the first component and second component and porosint sample is on chip gets.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the hole diameter detection apparatus of porosint of the present invention.
Embodiment
As indicated with 1, first component 110 of hole diameter detection apparatus is provided with air cavity 111 and the admission gear 112 for external compression gas being introduced this air cavity 111, second component 120 is provided with sap cavity 121, first component 110 is connected by a docking structure with between second component 120 and between the first component 110 and second component 120, forms the slit suitable with porosint coupons 200 to be detected after connecting, described porosint coupons 200 schedules described slit via the edge seal 130 being arranged in these porosint coupons 200 both sides to clamping, described air cavity 111 lays respectively at porosint coupons 200 both sides with sap cavity 121 and is only separated by this porosint coupons 200.During use, test fluid 122 (as anhydrous alcohol) is stored in sap cavity 121, admission gear 112 connects compressed gas source, porosint coupons 200 schedules described slit by the edge seal 130 being arranged in these porosint coupons 200 both sides to clamping, then in air cavity 111, external compression gas (as pressurized air) is introduced by admission gear 112, gaseous tension is ascending to be regulated, just start force value when emitting bubble in record test fluid 122, the maximum diameter of hole of porosint can have been calculated by relevant existing formula; Continue pressurization, when bubble is even, record force value, obtains the average pore size of porosint by relevant existing formula.
As shown in Figure 1, the first component 110 is specially a cup shell, and its glass of groove is described air cavity 111, and described admission gear 112 is positioned at sidepiece or the bottom of this cup shell; Second component 120 is specially a cover unit, and the top board of this cover unit has certain thickness and the groove being provided with up/down perforation forms described sap cavity 121; The upper surface of described cup groove and the lower surface of groove are respectively equipped with the first packing washer 130a and the second packing washer 130b, and described porosint coupons 200 schedules between the first packing washer 130a and the second packing washer 130b and the center of cup shell, porosint coupons and cover unit be roughly located along the same line to clamping.The fixed form of above-mentioned cup shell and cover unit can have multiple, such as, design special interface arrangment and clamp.As Fig. 1, optimal way is provided with the pipe box with top board one, and the inner surface of pipe box is provided with internal thread, and the outside surface of cup shell is provided with external thread, and the first component 110 is docked by above-mentioned internal and external threads adaptation with between second component 120.Wherein, first packing washer 130a and the second packing washer 130b preferably adopts rubber elastomeric material, so that by this porosint coupons 200 to clamping fixed after elastic bending deflection thus envelope the outer ring surface of described porosint coupons 200, in case pressure gas, from the outer ring surface of porosint coupons 200, small infiltration occurs, improve accuracy of detection.
Embodiment
Preparation diameter is 30mm, and thickness is the porosint coupons 200 (totally 5 pieces, specimen coding 1 ~ 5) of 3mm, is first about 30min by washed with de-ionized water, then dry 3h at 105 DEG C.Then air-leakage test is carried out to the hole diameter detection apparatus of porosint, that is: after installing porosint coupons 200, test fluid 122 (absolute ethyl alcohol) is poured into the sap cavity 121 of second component 120, then open air valve and pass into pressurized air by admission gear 112, until tensimeter is about 2Kpa, observe the sap cavity 121 edge whether bubbling of the first component 120, if occur, bubble should change the first packing washer 130a and the second packing washer 130b.After this, test maximum diameter of hole (first bubble point pressure) and the average pore size (test of group's bubble point pressure) of these porosint coupons 200 according to " bubble method " method of testing, concrete steps are: a, first by porosint coupons 200 pre-soaking 10 ~ 15min in test fluid 122; B, porosint coupons 200 is arranged on the hole diameter detection apparatus of porosint; C, test fluid 122 is poured into the sap cavity 121 of the first structural member 120, liquid level is greater than 10mm; C, slowly open air valve, air pressure is started from scratch, with the supercharging gradually of the rate of pressure rise of 20 ~ 100Pa/s; The surface of d, observation porosint coupons 200, when a string bubble is occurred by first obvious point (or several bubble is simultaneously by the obvious point of several point), writes down pressure corresponding to initial bubble, the height of specimen surface and the temperature of test fluid 122; E, continuation slowly increase air pressure, observe porosint coupons 200 surface, when boiling appears in bubble in liquid, write down pressure, the height of specimen surface and the temperature of test fluid 122.
Test findings is in table 1.
Table 1: the maximum diameter of hole of porosint coupons and middle flow average pore size (20 DEG C)
Computing formula:
Wherein, d---be equivalent to the equivalent diameter of the kapillary in bubble test aperture, unit: m;
The surface tension of γ---test(ing) liquid, unit: N/m (this test temperature room temperature 20 DEG C, liquid is 95% absolute ethyl alcohol,
Surface tension is 0.02305);
Θ---infiltrate liquid to the infiltration angle of porosint sample, unit: degree.
Claims (4)
1. the hole diameter detection apparatus of porosint, comprise the first component (110) and second component (120), described first component (110) is provided with air cavity (111) and the admission gear (112) for external compression gas being introduced this air cavity (111), described second component (120) is provided with sap cavity (121), it is characterized in that: described first component (110) is connected by a docking structure with between second component (120) and between the first component (110) and second component (120), forms the slit suitable with porosint coupons (200) to be detected after connecting, described porosint coupons (200) schedules described slit via the edge seal (130) being arranged in these porosint coupons (200) both sides to clamping, described air cavity (111) and sap cavity (121) lay respectively at porosint coupons (200) both sides and are only separated by this porosint coupons (200).
2. the hole diameter detection apparatus of porosint as claimed in claim 1, it is characterized in that: described first component (110) is a cup shell, its glass of groove is described air cavity (111), and described admission gear (112) is positioned at sidepiece or the bottom of this cup shell; Described second component (120) is a cover unit, and the top board of this cover unit has certain thickness and the groove being provided with up/down perforation forms described sap cavity (121); The upper surface of described cup groove and the lower surface of groove are respectively equipped with the first packing washer (130a) and the second packing washer (130b), and described porosint coupons (200) schedules between the first packing washer (130a) and the second packing washer (130b) and the center of cup shell, porosint coupons and cover unit be roughly located along the same line to clamping.
3. the hole diameter detection apparatus of porosint as claimed in claim 1 or 2, is characterized in that: described first component (110) is docked by internal and external threads adaptation with between second component (120).
4. the hole diameter detection apparatus of porosint as claimed in claim 1 or 2, is characterized in that: the edge seal (130) laying respectively at porosint coupons (200) both sides by this porosint coupons (200) to clamping fixed after elastic bending deflection thus envelope the outer ring surface of described porosint coupons (200).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410520496.5A CN104266952A (en) | 2014-09-30 | 2014-09-30 | Pore diameter detection device of porous material |
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|---|---|---|---|
| CN201410520496.5A CN104266952A (en) | 2014-09-30 | 2014-09-30 | Pore diameter detection device of porous material |
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| CN104266952A true CN104266952A (en) | 2015-01-07 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572013A (en) * | 2015-12-24 | 2016-05-11 | 太原理工大学 | Apparatus and method for testing permeability of porous material |
| CN107144512A (en) * | 2017-06-15 | 2017-09-08 | 深圳大学 | A kind of concrete permeability testing device and its test system |
| CN109900611A (en) * | 2017-12-11 | 2019-06-18 | 中国科学院大连化学物理研究所 | A kind of porous material fixture measuring gas-premeable |
| CN111380794A (en) * | 2020-04-07 | 2020-07-07 | 湖南中科特种陶瓷技术开发有限公司 | Detection method for pore diameter of porous ceramic component |
| CN113624656A (en) * | 2021-07-14 | 2021-11-09 | 南京三乐集团有限公司 | Device and method for nondestructive testing of uniformity of barium-tungsten cathode substrate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572013A (en) * | 2015-12-24 | 2016-05-11 | 太原理工大学 | Apparatus and method for testing permeability of porous material |
| CN105572013B (en) * | 2015-12-24 | 2018-06-08 | 太原理工大学 | A kind of device and method for testing porous material permeability |
| CN107144512A (en) * | 2017-06-15 | 2017-09-08 | 深圳大学 | A kind of concrete permeability testing device and its test system |
| CN109900611A (en) * | 2017-12-11 | 2019-06-18 | 中国科学院大连化学物理研究所 | A kind of porous material fixture measuring gas-premeable |
| CN111380794A (en) * | 2020-04-07 | 2020-07-07 | 湖南中科特种陶瓷技术开发有限公司 | Detection method for pore diameter of porous ceramic component |
| CN113624656A (en) * | 2021-07-14 | 2021-11-09 | 南京三乐集团有限公司 | Device and method for nondestructive testing of uniformity of barium-tungsten cathode substrate |
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Application publication date: 20150107 |