CN106644823A - Air tightness testing device for coal wall coating and air tightness testing method applied to air tightness testing device - Google Patents
Air tightness testing device for coal wall coating and air tightness testing method applied to air tightness testing device Download PDFInfo
- Publication number
- CN106644823A CN106644823A CN201611191098.9A CN201611191098A CN106644823A CN 106644823 A CN106644823 A CN 106644823A CN 201611191098 A CN201611191098 A CN 201611191098A CN 106644823 A CN106644823 A CN 106644823A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- air
- glass tube
- shaped glass
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 64
- 239000003245 coal Substances 0.000 title claims abstract description 39
- 239000011248 coating agent Substances 0.000 title claims abstract description 36
- 238000000576 coating method Methods 0.000 title claims abstract description 36
- 239000011521 glass Substances 0.000 claims abstract description 55
- 238000000034 method Methods 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 42
- 229910052742 iron Inorganic materials 0.000 claims description 21
- 239000003973 paint Substances 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000035515 penetration Effects 0.000 claims description 11
- 230000035699 permeability Effects 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000009738 saturating Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 5
- 239000008187 granular material Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000843 powder Substances 0.000 description 5
- 239000010408 film Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/10—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing diffusion of components through a porous wall and measuring a pressure or volume difference
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides an air tightness testing device for a coal wall coating and an air tightness testing method applied to the air tightness testing device, belongs to the field of air tightness testing devices and methods and aims at solving the problem of high probability of inaccurate testing result due to the fact that the air tightness of the coal wall coating is tested by a device for testing air tightness of film or lamellar materials at present. The air tightness testing device comprises an air cylinder, a U-shaped glass tube differential pressure gauge and an air tightness testing tube, wherein the air tightness testing tube comprises a flange, bolts, gaskets, nuts, coal granules, a gas distributor, a tube body and a pressure gauge; the gas distributor is arranged at the bottom of the tube body, and a gas inlet of the gas distributor is connected with a gas inlet of the tube body; the tube body is uniformly filled with the coal granules which are located on the gas distributor; the flange is arranged at the top of the tube body and is in sealed connection with the tube body through the bolts, the gaskets and the nuts; the pressure gauge is arranged on the side wall of the tube body; a gas outlet formed in the flange is connected with a gas inlet of the U-shaped glass tube differential pressure gauge through a second hose; a gas outlet of the air cylinder is connected with the gas inlet of the tube body through a first hose and a gas inlet valve.
Description
Technical field
The present invention relates to test device for air tightness and air tightness testing method technical field, more particularly to a kind of rib coating
Test device for air tightness and its air tightness testing method.
Background technology
China is a big coal country, in process of coal mining tunnel Gas can cause gas resources waste it is serious,
The problems such as downhole safety operation.In addition to ventilation, numerous enterprises reduce and slow down gas row in the way of coating spraying rib
Put.The core index of rib coating is air-tightness.
There are many devices for being used for air tightness test, the such as He of patent 201520074737.8 on the market at present
201520055291.4 disclose the ventilation property test device for packaging material；GB/T7755-2003 discloses one kind to be used for
The assay method and device of vulcanized rubber or thermoplastic elastomer gas permeability；GB/T 1038-2000 disclose a kind of thin for plastics
The gas-premeable test method of film and thin slice；Labthink Instruments Co., Ltd. develops saturating for film sample gas
The series of tests instrument of the property crossed.Prior art is used when the air-tightness to rib coating is tested, often is used for testing film
Or the bubble-tight device of sheet layer material is realizing.However, due to underground coal mine rib coating material and detection environment difference, because
This, during by these devices to test the air-tightness of rib coating so that test result may be inaccurate.
The content of the invention
Present invention aim to address testing the gas of rib coating with film or the bubble-tight device of sheet layer material at present
Close property, is easily caused the inaccurate technical problem of test result, there is provided a kind of test device for air tightness and its gas of rib coating
Close property method of testing.
To solve above-mentioned technical problem, the technical solution used in the present invention is：
A kind of test device for air tightness of rib coating, including air steel cylinder and U-shaped glass tube differential manometer, it also includes gas
Close property test barrel；The air tightness test cylinder includes flange, bolt, pad, nut, coal grain, gas distributor, cylinder and pressure
Meter；The gas distributor is arranged at the bottom of cylinder and the air inlet of gas distributor is connected with the air inlet of cylinder；It is described
Coal grain is uniformly filled in cylinder and is located above gas distributor；The flange is located at the top of cylinder, and by bolt,
Pad and nut are connected the cylinder with flange seal；The pressure gauge is located on the side wall of cylinder；What is arranged on flange goes out
Gas port is connected with the air inlet of U-shaped glass tube differential manometer by the second flexible pipe；The gas outlet of the air steel cylinder is soft by first
Pipe and intake valve are connected with the air inlet of cylinder.
Alternatively, the cylinder is cylinder, and its a diameter of 133mm is highly 125mm, and thickness is 4mm.
Alternatively, the height that coal grain is filled in the cylinder is 115mm, and the particle diameter of coal grain is 1-5mm.
A kind of air tightness testing method of the test device for air tightness for being applied to above-mentioned rib coating, it includes following step
Suddenly：
The first step, sprayed coating：Paint sample to be measured is sprayed at into coal grain upper surface, and makes the thickness of paint sample to be measured
2-5mm is reached, paint sample solidification to be measured, surface free from flaw, and after fitting with cylinder inboard wall, form dope layer；
Second step, places one or more with cylinder cross-sectional area identical or less than cylinder cross-sectional area on dope layer
Iron plate, is provided with least one hole on the iron plate；By blind flange on cylinder, the flange is brought into close contact with iron plate, uses spiral shell
Bolt, pad and nut are tightly connected flange and cylinder；
3rd step, opens air steel cylinder and intake valve, is inflated to the initial pressure P of cylinder rapidly to cylinder0, close air steel
Bottle and intake valve, wherein P0=mP1, the value of m is 1.5-3, P1The initial pressure of the left pipe of U-shaped glass tube differential manometer is represented, its value is
Atmospheric pressure；Record the initial level scale H of the left pipe of U-shaped glass tube differential manometer1；According to the air of the left pipe of U-shaped glass tube differential manometer
Height and diameter calculate the initial volume M of the left pipe air of U-shaped glass tube differential manometer；Cylinder is determined according to cylinder volume and coal plastochondria product
Internal gas volume N, wherein, the initial volume M of the gas volume N in cylinder and the left pipe air of U-shaped glass tube differential manometer it
Between ratio be 10:1-18:1, to ensure the pressure reduction of dope layer both sides；
4th step, the gas in cylinder is oozed by dope layer in the second flexible pipe being connected with the gas outlet arranged on flange
Thoroughly, after waiting the liquid level in U-shaped glass tube differential manometer stable, the final liquid level scale of the left pipe of U-shaped glass tube differential manometer is recorded
H2With time of penetration t', and by formula Δ H'=H1-H2Calculate the liquid level scale variation delta of the left pipe of U-shaped glass tube differential manometer
H'；
5th step, is repeated several times the above-mentioned first step to the 4th step, and the liquid level for obtaining the left pipe of multiple U-shaped glass tube differential manometers is carved
Gas volume N in degree variation delta H', the initial volume M of the left pipe air of multiple U-shaped glass tube differential manometers, multiple cylinders and many
Individual time of penetration t'；
6th step, calculates the mean value of multiple liquid level scale variation deltas H', obtains the mean value of liquid level scale variable quantity
ΔH；The mean value of multiple initial volume M is calculated, and is averaged value as initial volume V1；Calculate the gas in multiple cylinders
The mean value of volume N, and using the mean value as the gas volume V in cylinder0；The mean value of multiple times of penetration t' is calculated,
And using the mean value as time of penetration t；
7th step, by formula V1'=V1+ Δ HA calculates the final volume V of the left pipe air of U-shaped glass tube differential manometer1', A
Represent the cross-sectional area of the left pipe of U-shaped glass tube differential manometer；By formula P1'=P1It is left that+2 ρ g Δs H calculate U-shaped glass tube differential manometer
The final pressure P of pipe1', ρ represents the fluid density in U-shaped glass tube differential manometer；G represents acceleration of gravity；
8th step, by formulaCalculating gas infiltration increases the molal quantity Δ n of air, and R is represented and rubbed
That gas constant；T represents temperature；
9th step, by formulaCylinder pressure drop Δ P is calculated, and according to formula P0'=P0- Δ P calculates cylinder
Final pressure P0'；
Tenth step, by formulaCalculate average pressure differential deltap P in process of osmosismean；
11st step, by formulaCalculate the gas permeability coefficient k, N at temperature TARepresent Avobenzene gal moral
Sieve constant；D represents the thickness of dope layer；S represented and arranged at least on dope layer energy vapor permeation area, i.e. iron plate above dope layer
The area and iron plate in one hole does not cover the area sum of dope layer.
The present invention adopts above-mentioned technical proposal, there is provided one kind can be used for simulation coal mine gas gas and gush out from rib
Pass through test device for air tightness and method of the dope layer to the rib coating of process of osmosis in tunnel afterwards.The relative background skill of the present invention
For art, test device for air tightness small volume used, equipment investment are low, simple to operate.In addition, with existing by thin films/sheets
The bubble-tight method of layer material test device for air tightness test rib coating is compared, and test fee is few, and testing cost is very low, fits very much
Close the bubble-tight laboratory testing research of rib coating.In addition, the present invention in cylinder by filling coal grain so that test process
Actual condition of mines can be simulated, so as to the test device for air tightness for passing through the rib coating tests the bubble-tight of rib coating
Test result is more accurate, it is ensured that can provide its suitable coating for using for coal mine down-hole tunnel wall.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is described in further detail.
Embodiment 1
As shown in figure 1, the test device for air tightness of the rib coating in the present embodiment, including air steel cylinder 1 and U-shaped glass
Pipe differential manometer 13, wherein, it also includes air tightness test cylinder；The air tightness test cylinder includes flange 4, bolt 6, pad 7, spiral shell
Female 8, coal grain 9, gas distributor 10, cylinder 11 and pressure gauge 14；The gas distributor 10 be arranged at the bottom of cylinder 11 and
The air inlet of gas distributor 10 is connected with the air inlet of cylinder 11；The coal grain 9 is uniformly filled in cylinder 11 and is located at gas
Above body distributor 10；The flange 4 is located at the top of cylinder 11, and by bolt 6, pad 7 and nut 8 by the cylinder
11 are tightly connected with flange 4；The pressure gauge 14 is located on the side wall of cylinder 11；The gas outlet arranged on flange 4 and U-shaped glass
The air inlet of pipe differential manometer 13 is connected by the second flexible pipe 12, and the gas outlet of the air steel cylinder 1 is by the first flexible pipe 2 and air inlet
Valve 3 is connected with the air inlet of cylinder 11.
Alternatively, the cylinder 11 is cylinder, its a diameter of 133mm, and the height of cylinder 11 is 125mm, the thickness of cylinder
Spend for 4mm, the height that coal grain 9 is filled in cylinder 11 is 115mm, and the particle diameter of the coal grain 9 is 1-5mm.
The bubble-tight method of test device for air tightness test rib coating of above-mentioned rib coating, comprises the following steps：
The first step, sprayed coating：Paint sample to be measured is sprayed at into coal grain upper surface, and makes the thickness of paint sample to be measured
2-5mm is reached, paint sample solidification to be measured, surface free from flaw, and after fitting with cylinder inboard wall, formation dope layer is (i.e. in Fig. 1
5)；
Second step, places one or more with cylinder cross-sectional area identical or less than cylinder cross-sectional area on dope layer
Iron plate, is provided with least one hole on the iron plate；By blind flange on cylinder, the flange is brought into close contact with iron plate, uses spiral shell
Bolt, pad and nut are tightly connected flange and cylinder；
3rd step, opens air steel cylinder and intake valve, is inflated to the initial pressure P of cylinder rapidly to cylinder0, close air steel
Bottle and intake valve, wherein P0=mP1, the value of m is 1.5-3, P1The initial pressure of the left pipe of U-shaped glass tube differential manometer is represented, its value is
Atmospheric pressure；Record the initial level scale H of the left pipe of U-shaped glass tube differential manometer1；According to the left pipe of cylindrical U-shaped glass tube differential manometer
Air height and diameter calculate the initial volume M of the left pipe air of U-shaped glass tube differential manometer, wherein, U-shaped glass tube differential manometer is left
The initial volume M of pipe air passes through the cross-sectional area of the left pipe of U-shaped glass tube differential manometer and the air of the left pipe of U-shaped glass tube differential manometer
Highly it is multiplied and obtains；The gas volume N in cylinder is determined according to cylinder volume and coal plastochondria product, wherein, the gas body in cylinder
Ratio between the product N and initial volume M of the left pipe air of U-shaped glass tube differential manometer is 10:1-18:1, to ensure dope layer both sides
Pressure reduction, the computational methods of the gas volume N in concrete cylinder deduct coal plastochondria product for cylinder volume；
Wherein, coal plastochondria product determination method is：The coal grain filled in cylinder is poured into the graduated container of mark, Ran Houxiang
Add water in container up to water and do not had coal grain upper surface and reached assigned scale, deducted with the assigned scale and add the volume of water to be
Coal plastochondria is accumulated；For example, the coal grain for inserting certain altitude in cylinder is poured into the beaker for marking graduated 200ml, in beaker
Add water up to water and do not had coal grain upper surface and reached 200ml, if this process adds 150ml water, can determine coal grain
Volume is 50ml；
4th step, the gas in cylinder is oozed by dope layer in the second flexible pipe being connected with the gas outlet arranged on flange
Thoroughly, after waiting the liquid level in U-shaped glass tube differential manometer stable, the final liquid level scale of the left pipe of U-shaped glass tube differential manometer is recorded
H2With time of penetration t', and by formula Δ H'=H1-H2Calculate the liquid level scale variation delta of the left pipe of U-shaped glass tube differential manometer
H'；
5th step, is repeated several times the above-mentioned first step to the 4th step, and the liquid level for obtaining the left pipe of multiple U-shaped glass tube differential manometers is carved
Gas volume N in degree variation delta H', the initial volume M of the left pipe air of multiple U-shaped glass tube differential manometers, multiple cylinders and many
Individual time of penetration t'；
6th step, calculates the mean value of multiple liquid level scale variation deltas H', obtains the mean value of liquid level scale variable quantity
ΔH；The mean value of multiple initial volume M is calculated, and is averaged value as initial volume V1；Calculate the gas in multiple cylinders
The mean value of volume N, and using the mean value as the gas volume V in cylinder0；The mean value of multiple times of penetration t' is calculated,
And using the mean value as time of penetration t；
7th step, by formula V1'=V1+ Δ HA calculates the final volume V of the left pipe air of U-shaped glass tube differential manometer1', A
Represent the cross-sectional area of the left pipe of U-shaped glass tube differential manometer；By formula P1'=P1It is left that+2 ρ g Δs H calculate U-shaped glass tube differential manometer
The final pressure P of pipe1', ρ represents the fluid density in U-shaped glass tube differential manometer；G represents acceleration of gravity；
8th step, by formulaCalculating gas infiltration increases the molal quantity Δ n of air, and R is represented and rubbed
That gas constant；T represents temperature；
9th step, by formulaCylinder pressure drop Δ P is calculated, and according to formula P0'=P0- Δ P calculates cylinder
Final pressure P0'；
Tenth step, by formulaCalculate average pressure differential deltap P in process of osmosismean；
11st step, by formulaCalculate the gas permeability coefficient k, N at temperature TARepresent Avobenzene gal moral
Sieve constant；D represents the thickness of dope layer；S represented and arranged at least on dope layer energy vapor permeation area, i.e. iron plate above dope layer
The area and iron plate in one hole does not cover the area sum of dope layer.
Embodiment 2
The test device for air tightness of the rib coating in the present embodiment with it is identical in embodiment 1.
The bubble-tight method of test rib coating in the present embodiment, comprises the following steps：By institute in above-described embodiment 1
The method stated is tested to above-mentioned air tightness testing method.In experiment, the present embodiment is with paint sample to be measured 60% to surpass
Illustrate as a example by fine paint powder.
The first step, sprayed coating：By superfined flyash 60g that particle diameter is 2.18 μm, be numbered 325 slag silicate salt solution
Mud 20g, chlorinated paraffin 8g, aluminium hydroxide 4g, Firebrake ZB 3g, graphite 3g, conductive black 2g are mixed and are powder, take S400F types
Styrene-acrylic emulsion 50g and water 25g after stirring at low speed 2min, add above-mentioned powder in beaker, continue with the rotating speed of 600r/min
At the uniform velocity stir after 15min and prepare paint sample to be measured；The paint sample to be measured for preparing equably is poured on into coal grain table
Face, and make the thickness of paint sample to be measured reach 2.8mm, paint sample solidification to be measured, surface free from flaw, and and cylinder inboard wall
After laminating is brought into close contact, dope layer is formed.
Second step, on dope layer place one with cylinder cross-sectional area identical or less than cylinder cross-sectional area iron plate,
At least one hole is provided with the iron plate；By blind flange on cylinder, the flange is brought into close contact with iron plate, with bolt, pad
Piece and nut are tightly connected flange with cylinder.
Remaining step using identical with the step in embodiment 1, wherein, the gas volume N in cylinder and U-shaped glass tube pressure
Ratio between the initial volume M of the left pipe air of difference meter is 15:1.
The each parameter obtained in the present embodiment test process and result of calculation are shown in Table one.
Table one
There is table one to understand, the gas permeability coefficient k of the paint sample to be measured measured in the embodiment is 6.29 × 1013m-1s-1Pa-1, it is 3.12 × 10 by the value that k is scaled P according to the reduction formula in table one between P and k-10cm2s-1cmHg-1, the meter
Test data P that result is calculated with Jinan, Shandong Province blue streak mechanical ＆ electrical technology Co., Ltd packaging safety detection center is 3.84 × 10- 10cm2s-1cmHg-1Substantially close to.
Embodiment 3
The test device for air tightness of the rib coating in the present embodiment with it is identical in embodiment 1.
The bubble-tight method of test rib coating in the present embodiment, comprises the following steps：
The first step, sprayed coating：By be numbered 325 portland slag cement 80g, chlorinated paraffin 8g, aluminium hydroxide 4g,
Firebrake ZB 3g, graphite 3g, conductive black 2g are mixed and are powder, take S400F type styrene-acrylic emulsion 50g and water 25g low in beaker
After speed stirring 2min, above-mentioned powder is added, continuation is at the uniform velocity stirred with the rotating speed of 600r/min and prepare after 15min to be measured
Paint sample；The paint sample to be measured for preparing equably is poured on into coal grain surface, and reaches the thickness of paint sample to be measured
2.1mm, paint sample to be measured solidification, surface free from flaw, and after fit with cylinder inboard wall and being brought into close contact, formation dope layer；
Second step, on dope layer place three with cylinder cross-sectional area identical or less than cylinder cross-sectional area iron plate,
At least one hole is provided with the iron plate；By blind flange on cylinder, the flange is brought into close contact with iron plate, with bolt, pad
Piece and nut are tightly connected flange with cylinder.
Remaining step using identical with the step in embodiment 1, wherein, the gas volume N in cylinder and U-shaped glass tube pressure
Ratio between the initial volume M of the left pipe air of difference meter is 16:1.
The each parameter obtained in the present embodiment test process and result of calculation are shown in Table two.
Table two
As shown in Table 2, the gas permeability coefficient k of the paint sample to be measured for measuring in the embodiment is 1.92 × 1014m-1s-1Pa-1, it is 9.54 × 10 by the value that k is scaled P according to the reduction formula in table two between P and k-10cm2s-1cmHg-1, the meter
Test data P that result is calculated with Jinan, Shandong Province blue streak mechanical ＆ electrical technology Co., Ltd packaging safety detection center is 10.67 × 10- 10cm2s-1cmHg-1Substantially close to.
Claims (4)
1. a kind of test device for air tightness of rib coating, including air steel cylinder (1) and U-shaped glass tube differential manometer (13), it is special
Levy and be, it also includes air tightness test cylinder；The air tightness test cylinder includes flange (4), bolt (6), pad (7), nut
(8), coal grain (9), gas distributor (10), cylinder (11) and pressure gauge (14)；The gas distributor (10) is arranged at cylinder
(11) bottom and the air inlet of gas distributor (10) is connected with the air inlet of cylinder (11)；The coal grain (9) is uniformly filled
In cylinder (11) and above gas distributor (10)；The flange (4) is located at the top of cylinder (11), and by spiral shell
Bolt (6), pad (7) and nut (8) are tightly connected the cylinder (11) with flange (4)；The pressure gauge (14) is located at cylinder
(11) on side wall；The gas outlet arranged on flange (4) passes through the second flexible pipe with the air inlet of U-shaped glass tube differential manometer (13)
(12) connect；The gas outlet of the air steel cylinder (1) is by the first flexible pipe (2) and the air inlet of intake valve (3) and cylinder (11)
Connection.
2. the test device for air tightness of rib coating according to claim 1, it is characterised in that the cylinder (11) is circle
Cylindricality, its a diameter of 133mm is highly 125mm, and thickness is 4mm.
3. the test device for air tightness of rib coating according to claim 1, it is characterised in that fill out in the cylinder (11)
The height for filling coal grain (9) is 115mm, and the particle diameter of coal grain (9) is 1-5mm.
4. a kind of air tightness testing method of the test device for air tightness for being applied to the rib coating described in claim 1,2 or 3,
Characterized in that, comprising the following steps：
The first step, sprayed coating：Paint sample to be measured is sprayed at into coal grain upper surface, and reaches the thickness of paint sample to be measured
2-5mm, paint sample solidification to be measured, surface free from flaw, and after fitting with cylinder inboard wall, form dope layer；
Second step, places one or more with cylinder cross-sectional area identical or less than the iron of cylinder cross-sectional area on dope layer
Piece, is provided with least one hole on the iron plate；By blind flange on cylinder, the flange is brought into close contact with iron plate, with bolt,
Pad and nut are tightly connected flange with cylinder；
3rd step, opens air steel cylinder and intake valve, is inflated to the initial pressure P of cylinder rapidly to cylinder0, close air steel cylinder and
Intake valve, wherein P0=mP1, the value of m is 1.5-3, P1The initial pressure of the left pipe of U-shaped glass tube differential manometer is represented, its value is air
Pressure；Record the initial level scale H of the left pipe of U-shaped glass tube differential manometer1；According to the air height of the left pipe of U-shaped glass tube differential manometer
With the initial volume M that diameter calculates the left pipe air of U-shaped glass tube differential manometer；Determined in cylinder according to cylinder volume and coal plastochondria product
Gas volume N, wherein, gas volume N in cylinder and between the initial volume M of the left pipe air of U-shaped glass tube differential manometer
Ratio is 10:1-18:1, to ensure the pressure reduction of dope layer both sides；
4th step, the gas in cylinder is permeated by dope layer in the second flexible pipe being connected with the gas outlet arranged on flange,
After stable etc. the liquid level in U-shaped glass tube differential manometer, the final liquid level scale H of the left pipe of U-shaped glass tube differential manometer is recorded2With
Time of penetration t', and by formula Δ H'=H1-H2Calculate liquid level scale variation delta H' of the left pipe of U-shaped glass tube differential manometer；
5th step, is repeated several times the above-mentioned first step to the 4th step, and the liquid level scale for obtaining the left pipe of multiple U-shaped glass tube differential manometers becomes
Gas volume N in change amount Δ H', the initial volume M of the left pipe air of multiple U-shaped glass tube differential manometers, multiple cylinders and multiple ooze
Saturating time t'；
6th step, calculates the mean value of multiple liquid level scale variation deltas H', obtains the average value Δ H of liquid level scale variable quantity；
The mean value of multiple initial volume M is calculated, and is averaged value as initial volume V1；Calculate the gas volume in multiple cylinders
The mean value of N, and using the mean value as the gas volume V in cylinder0；The mean value of multiple times of penetration t' is calculated, and will
The mean value is used as time of penetration t；
7th step, by formula V1'=V1+ Δ HA calculates the final volume V of the left pipe air of U-shaped glass tube differential manometer1', A represents U
The cross-sectional area of the left pipe of type glass tube differential manometer；By formula P1'=P1+ 2 ρ g Δs H calculate the left pipe of U-shaped glass tube differential manometer most
The strong P of final pressure1', ρ represents the fluid density in U-shaped glass tube differential manometer；G represents acceleration of gravity；
8th step, by formulaCalculating gas infiltration increases the molal quantity Δ n of air, and R represents a mole gas
Body constant；T represents temperature；
9th step, by formulaCylinder pressure drop Δ P is calculated, and according to formula P0'=P0It is final that-Δ P calculates cylinder
Pressure P0'；
Tenth step, by formulaCalculate average pressure differential deltap P in process of osmosismean；
11st step, by formulaCalculate the gas permeability coefficient k, N at temperature TARepresent that Avogadro is normal
Number；D represents the thickness of dope layer；S represents at least one arranged on dope layer energy vapor permeation area, i.e. iron plate above dope layer
The area and iron plate in hole does not cover the area sum of dope layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611191098.9A CN106644823B (en) | 2016-12-21 | 2016-12-21 | Air tightness testing device and method for coal wall coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611191098.9A CN106644823B (en) | 2016-12-21 | 2016-12-21 | Air tightness testing device and method for coal wall coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106644823A true CN106644823A (en) | 2017-05-10 |
| CN106644823B CN106644823B (en) | 2023-03-28 |
Family
ID=58834726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611191098.9A Active CN106644823B (en) | 2016-12-21 | 2016-12-21 | Air tightness testing device and method for coal wall coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106644823B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361292A (en) * | 2019-08-12 | 2019-10-22 | 南京师范大学 | A kind of evaluating apparatus and evaluation method of pesticide industry place smell substance covering material closed performance |
Citations (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1004206A (en) * | 1962-08-31 | 1965-09-15 | Commissariat Energie Atomique | Improvements in and relating to systems for measuring the permeability of pourous barriers |
| US4009649A (en) * | 1976-04-02 | 1977-03-01 | The United States Of America As Represented By The Secretary Of The Interior | Mine ventilation control device |
| US4470882A (en) * | 1981-09-25 | 1984-09-11 | Tokyo Shibaura Denki Kabushiki Kaisha | Gas leak detector |
| US5214957A (en) * | 1992-03-31 | 1993-06-01 | Hydro-Quebec | Integrity and leak rate testing of a hermetic building |
| EP0638792A1 (en) * | 1992-08-07 | 1995-02-15 | UNTERGRUNDSPEICHER- UND GEOTECHNOLOGIE-SYSTEME GmbH | Procedure and facility for leak testing of a cemented part of a pipe |
| US6065329A (en) * | 1996-12-27 | 2000-05-23 | Asahi Kasei Kogyo Kabushiki Kaisha | Device and method for detecting leakage of filter film |
| CN1307461A (en) * | 1998-04-28 | 2001-08-08 | 宝洁公司 | Absorbent articles with distribution materials positioned underneath storage material |
| RU2187795C1 (en) * | 2001-06-15 | 2002-08-20 | Ярославский государственный технический университет | Gear determining coefficient of gas permeability of powders |
| JP2006170918A (en) * | 2004-12-17 | 2006-06-29 | National Institute Of Advanced Industrial & Technology | Gas leakage evaluator |
| CN1815175A (en) * | 2006-02-07 | 2006-08-09 | 同济大学 | Detecting instrument for concrete gas seepage coefficient under single-shaft-pressure stress and detecting method |
| CN1898008A (en) * | 2003-12-24 | 2007-01-17 | 切夫里昂美国公司 | Mixed matrix membranes with small pore molecular sieves and methods for making and using the membranes |
| CN101393100A (en) * | 2008-11-04 | 2009-03-25 | 中国矿业大学(北京) | Ventilation property test method and device for hypergolic coal waste pile isolating layer |
| CN201293753Y (en) * | 2008-11-04 | 2009-08-19 | 中国矿业大学(北京) | Equipment for testing hypergolic coal gangue mountain isolated layer ventilation property |
| CN201348602Y (en) * | 2009-01-13 | 2009-11-18 | 苏州大学 | Carbon rod air permeability testing device |
| CN101781497A (en) * | 2009-12-19 | 2010-07-21 | 山西潞安环保能源开发股份有限公司 | Underground gas plugging coating in coal mine |
| CN102865979A (en) * | 2012-09-14 | 2013-01-09 | 四川制动科技股份有限公司 | Testing system and testing method for air tightness of main valve body component of 120 valve |
| CN103323566A (en) * | 2013-05-20 | 2013-09-25 | 源达日化(天津)有限公司 | Laboratory device for detecting carbon tetrachloride adsorption rate of active carbon |
| CN103353379A (en) * | 2013-07-12 | 2013-10-16 | 河南大有能源股份有限公司 | Gas leakage detection apparatus of coal mine gas drainage pipeline |
| US20140013824A1 (en) * | 2012-07-12 | 2014-01-16 | University Of Florida Research Foundation, Inc. | Method and apparatus for increasing the speed and/or resolution of gas permeation measurements |
| CN203551445U (en) * | 2013-11-21 | 2014-04-16 | 武汉纺织大学 | Panel air tightness testing device |
| CN103852406A (en) * | 2012-12-04 | 2014-06-11 | 中国科学院大连化学物理研究所 | Device for testing air permeability of carbon paper/diffusion layer and usage method of device |
| CN104147831A (en) * | 2014-07-22 | 2014-11-19 | 江南大学 | Visualized laboratory filtering device |
| CN104266951A (en) * | 2014-09-26 | 2015-01-07 | 河南理工大学 | System and method for accurately measuring dynamic change of porosity of loaded coal rock |
| CN104406895A (en) * | 2014-11-18 | 2015-03-11 | 河南理工大学 | Novel coal bed permeability testing device and method |
| CN204302155U (en) * | 2014-12-03 | 2015-04-29 | 中国矿业大学 | Dynamic load effect coal body permeability detector |
| CN104650664A (en) * | 2015-02-10 | 2015-05-27 | 山西大学 | Gas plugging coating for wall surface of mine laneway |
| CN204461964U (en) * | 2015-01-27 | 2015-07-08 | 苏鹏鸣 | For the ventilation property test device of tea packaging material |
| CN104763469A (en) * | 2015-02-10 | 2015-07-08 | 山西大学 | Detection method for gas emission quantity on wall surface of mine laneway |
| CN204575487U (en) * | 2015-02-03 | 2015-08-19 | 黄丁玲 | For the ventilation property test device of wrappage |
| CN205067273U (en) * | 2015-09-28 | 2016-03-02 | 南京日东光学薄膜技术有限公司 | A viscosimeter for determining coating viscosity |
| CN205449758U (en) * | 2016-04-01 | 2016-08-10 | 河南理工大学 | Outlet pressure adjustable coal petrography seepage flow experimental system |
| CN106197544A (en) * | 2016-07-18 | 2016-12-07 | 南华大学 | Particle packing type is emanated the determination method of physical parameter and measurement apparatus thereof that medium radon migrates |
| CN206387698U (en) * | 2016-12-21 | 2017-08-08 | 山西大学 | The test device for air tightness of rib coating |
-
2016
- 2016-12-21 CN CN201611191098.9A patent/CN106644823B/en active Active
Patent Citations (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1004206A (en) * | 1962-08-31 | 1965-09-15 | Commissariat Energie Atomique | Improvements in and relating to systems for measuring the permeability of pourous barriers |
| US4009649A (en) * | 1976-04-02 | 1977-03-01 | The United States Of America As Represented By The Secretary Of The Interior | Mine ventilation control device |
| US4470882A (en) * | 1981-09-25 | 1984-09-11 | Tokyo Shibaura Denki Kabushiki Kaisha | Gas leak detector |
| US5214957A (en) * | 1992-03-31 | 1993-06-01 | Hydro-Quebec | Integrity and leak rate testing of a hermetic building |
| EP0638792A1 (en) * | 1992-08-07 | 1995-02-15 | UNTERGRUNDSPEICHER- UND GEOTECHNOLOGIE-SYSTEME GmbH | Procedure and facility for leak testing of a cemented part of a pipe |
| US6065329A (en) * | 1996-12-27 | 2000-05-23 | Asahi Kasei Kogyo Kabushiki Kaisha | Device and method for detecting leakage of filter film |
| CN1307461A (en) * | 1998-04-28 | 2001-08-08 | 宝洁公司 | Absorbent articles with distribution materials positioned underneath storage material |
| RU2187795C1 (en) * | 2001-06-15 | 2002-08-20 | Ярославский государственный технический университет | Gear determining coefficient of gas permeability of powders |
| CN1898008A (en) * | 2003-12-24 | 2007-01-17 | 切夫里昂美国公司 | Mixed matrix membranes with small pore molecular sieves and methods for making and using the membranes |
| JP2006170918A (en) * | 2004-12-17 | 2006-06-29 | National Institute Of Advanced Industrial & Technology | Gas leakage evaluator |
| CN1815175A (en) * | 2006-02-07 | 2006-08-09 | 同济大学 | Detecting instrument for concrete gas seepage coefficient under single-shaft-pressure stress and detecting method |
| CN101393100A (en) * | 2008-11-04 | 2009-03-25 | 中国矿业大学(北京) | Ventilation property test method and device for hypergolic coal waste pile isolating layer |
| CN201293753Y (en) * | 2008-11-04 | 2009-08-19 | 中国矿业大学(北京) | Equipment for testing hypergolic coal gangue mountain isolated layer ventilation property |
| CN201348602Y (en) * | 2009-01-13 | 2009-11-18 | 苏州大学 | Carbon rod air permeability testing device |
| CN101781497A (en) * | 2009-12-19 | 2010-07-21 | 山西潞安环保能源开发股份有限公司 | Underground gas plugging coating in coal mine |
| US20140013824A1 (en) * | 2012-07-12 | 2014-01-16 | University Of Florida Research Foundation, Inc. | Method and apparatus for increasing the speed and/or resolution of gas permeation measurements |
| CN102865979A (en) * | 2012-09-14 | 2013-01-09 | 四川制动科技股份有限公司 | Testing system and testing method for air tightness of main valve body component of 120 valve |
| CN103852406A (en) * | 2012-12-04 | 2014-06-11 | 中国科学院大连化学物理研究所 | Device for testing air permeability of carbon paper/diffusion layer and usage method of device |
| CN103323566A (en) * | 2013-05-20 | 2013-09-25 | 源达日化(天津)有限公司 | Laboratory device for detecting carbon tetrachloride adsorption rate of active carbon |
| CN103353379A (en) * | 2013-07-12 | 2013-10-16 | 河南大有能源股份有限公司 | Gas leakage detection apparatus of coal mine gas drainage pipeline |
| CN203551445U (en) * | 2013-11-21 | 2014-04-16 | 武汉纺织大学 | Panel air tightness testing device |
| CN104147831A (en) * | 2014-07-22 | 2014-11-19 | 江南大学 | Visualized laboratory filtering device |
| CN104266951A (en) * | 2014-09-26 | 2015-01-07 | 河南理工大学 | System and method for accurately measuring dynamic change of porosity of loaded coal rock |
| CN104406895A (en) * | 2014-11-18 | 2015-03-11 | 河南理工大学 | Novel coal bed permeability testing device and method |
| CN204302155U (en) * | 2014-12-03 | 2015-04-29 | 中国矿业大学 | Dynamic load effect coal body permeability detector |
| CN204461964U (en) * | 2015-01-27 | 2015-07-08 | 苏鹏鸣 | For the ventilation property test device of tea packaging material |
| CN204575487U (en) * | 2015-02-03 | 2015-08-19 | 黄丁玲 | For the ventilation property test device of wrappage |
| CN104763469A (en) * | 2015-02-10 | 2015-07-08 | 山西大学 | Detection method for gas emission quantity on wall surface of mine laneway |
| CN104650664A (en) * | 2015-02-10 | 2015-05-27 | 山西大学 | Gas plugging coating for wall surface of mine laneway |
| CN205067273U (en) * | 2015-09-28 | 2016-03-02 | 南京日东光学薄膜技术有限公司 | A viscosimeter for determining coating viscosity |
| CN205449758U (en) * | 2016-04-01 | 2016-08-10 | 河南理工大学 | Outlet pressure adjustable coal petrography seepage flow experimental system |
| CN106197544A (en) * | 2016-07-18 | 2016-12-07 | 南华大学 | Particle packing type is emanated the determination method of physical parameter and measurement apparatus thereof that medium radon migrates |
| CN206387698U (en) * | 2016-12-21 | 2017-08-08 | 山西大学 | The test device for air tightness of rib coating |
Non-Patent Citations (6)
| Title |
|---|
| HUIPING SONG 等: "The application of ultra-fine fly ash in the seal coating for the wall of underground coal mine", 《ADVANCED POWDER TECHNOLOGY》 * |
| ZECHENG LI 等: "Effectiveness of thin spray-on liners as a gas management tool in underground coal mines", 《INTERNATIONAL JOURNAL OF COAL GEOLOGY》 * |
| 刘孝锋 等: "基于压差法的薄膜透气性测试装置研究现状", 《包装工程》 * |
| 刘建强: "粉煤灰基瓦斯封堵材料的制备及性能优化研究", 《中国优秀硕士学位论文全文数据库工程科技I辑》 * |
| 国家质量技术监督局: "《GB/T 1038-2000塑料薄膜和薄片气体透过性试验方法 压差法》", 5 April 2000 * |
| 国家质量监督检验检疫总局: "《GB/T 7755-2003 硫化橡胶或热塑性橡胶 透气性的测定》", 23 June 2003 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361292A (en) * | 2019-08-12 | 2019-10-22 | 南京师范大学 | A kind of evaluating apparatus and evaluation method of pesticide industry place smell substance covering material closed performance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106644823B (en) | 2023-03-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Fancher et al. | Flow of simple fluids through porous materials | |
| CN105805559B (en) | Liquid pipe leaks the equivalent circular hole experimental provision in irregular hole and experimental method | |
| CN104296962B (en) | Measure the viscosity factor and inertial resistance coefficient experimental provision of porous media | |
| CN208736781U (en) | A kind of no lateral confinement measuring gas permebility device | |
| CN113252528A (en) | Unsaturated soil body gas permeability coefficient measuring device in environmental rock field | |
| CN106644823A (en) | Air tightness testing device for coal wall coating and air tightness testing method applied to air tightness testing device | |
| CN203585824U (en) | Pipeline leakage test device | |
| US3363461A (en) | Method for measuring flow | |
| CN206387698U (en) | The test device for air tightness of rib coating | |
| CN202471557U (en) | Multifunctional sand column water vapor seepage tester | |
| CN109083630A (en) | A method of for appraisal drilling liquid sealing characteristics | |
| CN105136644A (en) | Equivalent method of aperture for hole between clay particles | |
| CN115979880B (en) | Device and method for testing near-surface soil water retention curve under low-stress environment | |
| CN206095896U (en) | Aggressivity CO2 environmental test device | |
| Sandén et al. | Deep repository-Engineered barrier system. Erosion and sealing processes in tunnel backfill materials investigated in laboratory | |
| CN112284992B (en) | Device and method for monitoring soil body mechanical response whole process in gas permeation process | |
| CN109827721B (en) | Experimental platform and method for leakage diffusion and pollutant removal of buried liquid hydrocarbon pipeline | |
| CN111611752B (en) | Real-time prediction method for non-liquid leakage influence range | |
| CN110595945B (en) | Method for measuring fluid components | |
| CN106053878B (en) | Thin sight flow observation device and its observation procedure when liquefaction in pellet pores | |
| CN206656946U (en) | Concrete gas testing permeability device | |
| CN105424543A (en) | Soil gas conductivity stable-state measuring and calculating method | |
| CN209802916U (en) | Hydraulic loading type viscous resistance coefficient and inertia resistance coefficient testing device | |
| Wright | Silos: Model and Field Studies | |
| CN211950519U (en) | Rock-soil body suspension type slurry grouting simulation equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |