CN115078218A - Instrument and method for detecting water permeability of enhanced coiled material in polyester fiber fabric - Google Patents
Instrument and method for detecting water permeability of enhanced coiled material in polyester fiber fabric Download PDFInfo
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- CN115078218A CN115078218A CN202210757241.5A CN202210757241A CN115078218A CN 115078218 A CN115078218 A CN 115078218A CN 202210757241 A CN202210757241 A CN 202210757241A CN 115078218 A CN115078218 A CN 115078218A
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- coiled material
- main body
- water
- box
- sealing
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- 239000000463 material Substances 0.000 title claims abstract description 96
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 230000035699 permeability Effects 0.000 title claims abstract description 26
- 239000004744 fabric Substances 0.000 title claims abstract description 22
- 239000000835 fiber Substances 0.000 title claims abstract description 22
- 229920000728 polyester Polymers 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 49
- 238000003825 pressing Methods 0.000 claims abstract description 31
- 238000003860 storage Methods 0.000 claims abstract description 14
- 238000000605 extraction Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000007781 pre-processing Methods 0.000 claims 4
- 230000008569 process Effects 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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Classifications
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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
- G01N15/082—Investigating permeability by forcing a fluid through a sample
Abstract
An instrument and a method for detecting the water permeability of an enhanced coiled material in a polyester fiber fabric are disclosed, wherein the instrument comprises a main body box, the side surface of the main body box is provided with an air suction port, and the air suction port is used for connecting a vacuum pump; a circle of sealing pressing strips are correspondingly arranged on four thickness edges at the upper opening of the main body box; the sealing pressing strip extends upwards to form a circle of water baffle, and the water baffle and the coiled material form a water storage structure; the method comprises the steps of covering a pretreatment coiled material above a transparent box which is 0.5 meter long and wide and is provided with an air suction opening on the side surface, fixedly sealing the edge of an upper opening of the transparent box and the pretreatment coiled material by using a circle of sealing pressing strip with an L-shaped or inverted T-shaped cross section to form a closed space, forming a water storage structure by using the sealing pressing strip with the L-shaped or inverted T-shaped cross section and the pretreatment coiled material, pouring water in the water storage structure to ensure that the pretreatment coiled material is soaked in water, connecting the air suction opening on the transparent box by using a vacuum pump, and continuously sucking air under negative pressure.
Description
Technical Field
The invention relates to the field of waterproof building material detection, in particular to an instrument and a method for detecting the water permeability of an enhanced coiled material in a polyester fiber fabric.
Background
The waterproof roll is mainly used for building walls, roofs, tunnels, highways, refuse landfills and the like, can be curled into a roll-shaped flexible building material product for resisting external rainwater and underground water leakage, is used as a leakage-free connection between an engineering foundation and a building, is a waterproof first barrier of the whole engineering, and plays a vital role in the whole engineering.
Today's waterproofing rolls are mostly made of several different material layers compounded by different processes. As the material of the surface and the bottom of the waterproof roll, a material which is completely impervious to water is generally used, for example, plastic such as PVC and PE, and a polyester fiber fabric material such as a polyester fiber mesh cloth is embedded in the waterproof roll to be used as a reinforcing rib of the waterproof roll, thereby improving the dimensional stability of the roll. The polyester fiber fabric internal reinforced coiled material is mainly used for laying underground planting roof plates or planting roofs.
On the premise of obtaining the waterproof roll material by combining various processes, the upper surface and the lower surface of the waterproof roll material do not relate to the problems of water permeation and water leakage, and because each layer is combined by the processes and because of the property of the polyester fiber mesh cloth material (the polyester fiber mesh cloth material is filled in the waterproof roll material in a warp-weft staggered manner), the waterproof roll material is possible to cause water permeation on four sides of the waterproof roll material, and the building leakage can be caused under the serious condition in the later period.
Currently, no detection apparatus or method is available for detecting the water permeability of a web containing polyester fiber fabric reinforcing ribs.
Disclosure of Invention
The invention provides an instrument and a method for detecting the water permeability of an enhanced type coiled material in a polyester fiber fabric, and aims to solve the problem that the water permeability of the enhanced type coiled material in the polyester fiber fabric cannot be detected.
In order to achieve the purpose, the first technical scheme adopted by the invention is as follows: the utility model provides an instrument of enhancement mode coiled material water permeability in detecting polyester fiber fabric which characterized in that: comprises a main body box, wherein the main body box is in a transparent box shape with an upper opening;
an air suction port is formed in the side face of the main body box and is used for being connected with a vacuum pump;
a circle of sealing pressing strips are correspondingly arranged on four thickness edges at the upper opening of the main body box;
the sealing pressing strip extends upwards to form a circle of water baffle;
during detection, the coiled material is arranged at the upper opening of the main body box, the coiled material and the main body box form a closed space, the sealing pressing strip is used for fixing and sealing, and the water baffle and the coiled material form a water storage structure.
The thickness face of the opening of the main body box is provided with one or more first fixing holes, the sealing pressing strip is correspondingly provided with one or more second fixing holes, and the sealing pressing strip, the coiled material and the main body box are fixedly sealed through the first fixing holes and the second fixing holes by screws.
Wherein, the length of the main body box is 0.3-0.8 m, and the width is 0.3-0.8 m.
Wherein, the length and the width of the main body box are both 0.5 meter.
The sealing pressing strip is obtained by fixedly connecting 4 sectional materials with L-shaped cross sections.
The sealing pressing strip is obtained by fixedly connecting 4 sections with inverted T-shaped cross sections.
The second technical scheme adopted by the invention is as follows: a method for detecting the water permeability of an enhanced coiled material in a polyester fiber fabric is characterized by comprising the following steps:
the method comprises the following steps:
the method comprises the following steps of firstly, simulating pretreatment operation of the working state of a coiled material to be detected:
cutting a coiled material to be detected into 3 small coiled materials with the width of 0.1-0.3 m, and sequentially paving and welding the 3 small coiled materials in the width direction to obtain a pretreated coiled material, wherein the width of the pretreated coiled material is more than 0.5 m, and the length of the pretreated coiled material is more than 0.5 m;
covering the pretreatment coiled material above a transparent box with the length and the width of 0.5 meter and an air suction port on the side surface, fixedly sealing the edge of an upper opening of the transparent box and the pretreatment coiled material by using a circle of sealing pressing strip with an L-shaped or inverted T-shaped cross section to form a closed space, forming a water storage structure by using the sealing pressing strip with the L-shaped or inverted T-shaped cross section and the pretreatment coiled material, pouring water in the water storage structure to ensure that the pretreatment coiled material is soaked in the water, connecting the air suction port on the transparent box by using a vacuum pump, and continuously sucking air under negative pressure;
and thirdly, checking whether water exists in the transparent box or not, and if no water is observed to penetrate through the pretreatment coiled material and drop into the transparent box, ensuring that the water permeability of the coiled material to be detected meets the water permeability requirement.
Wherein, in the second step, negative pressure air extraction is carried out for 48 hours.
Wherein the length of the web is generally fixed. In the technical scheme, the length direction can be cut without cutting. However, in general, no trimming process is performed in the longitudinal direction for cost saving.
Wherein, welding is a conventional technique in the field and is not described in detail.
The time of negative pressure air exhaust can be adjusted according to the requirements of the production mechanism, and the longer the time of negative pressure air exhaust for water tightness is, the worse the water permeability is, the more the daily use can be met.
Wherein, the sealing pressing strip and the transparent box can be fixed by screw punching.
The invention has the beneficial effects that:
1. the instrument for detecting the water permeability, which is provided by the technical scheme of the invention, has the advantages of simple structure, easiness in preparation and low cost, and the principle is that negative pressure air extraction is utilized to accelerate the simulation of the situation of water permeability loss of the coiled material in daily use; the main body box is of a transparent structure, so that the water permeation effect can be directly observed; the sealing pressing strip has two functions, namely, the sealing performance between the coiled material to be tested and the main body box is enhanced, and the sectional material with the L-shaped or inverted T-shaped cross section upwards forms a circle of water retaining structure to form a water storage structure with the upper surface of the coiled material to be tested, so that an accumulation structure is provided for water supply.
2. The technical scheme of the invention also provides a method for detecting water permeability, wherein the internal enhanced waterproof coiled material is pretreated, and 3 coiled materials are spliced and welded in sequence in the width direction, so that the coiled material in the middle is simulated to be in a working state.
Drawings
FIG. 1 is a three-dimensional exploded view (L-shaped sealing bead) of the apparatus for detecting the water permeability of the enhanced coil in the polyester fiber fabric.
Fig. 2 is an enlarged view of a portion a of fig. 1.
FIG. 3 is a schematic view of the water permeable front side of the web.
FIG. 4 is a schematic view showing the processed placement of the web to be tested (non-test state).
FIG. 5 is a cross-sectional view of the L-shaped sealing bead (the splash plate on the outside and the splash plate on the inside, example 1 with the splash plate on the inside).
FIG. 6 is a schematic cross-sectional view of an inverted T-shaped sealing bead.
In the above drawings: 1. a theme box; 11. an air extraction opening; 12. sealing and pressing strips; 121, a water baffle; 122. a second fixing hole; 13. a first fixing hole; 2. a screw; 3. polyester fiber mesh cloth.
Detailed Description
The invention is further described with reference to the following figures and examples:
example 1: instrument for detecting water permeability of reinforced coiled material in polyester fiber fabric
The utility model provides an instrument of enhancement mode coiled material water permeability in detecting polyester fiber fabric which characterized in that: comprises that
The main body box 1 is in a transparent box shape with an upper opening;
an air suction port 11 is formed in the side surface of the main body box 1, and the air suction port 11 is used for being connected with a vacuum pump;
a circle of sealing pressing strips 12 are correspondingly arranged on four thickness edges at the upper opening of the main body box 1;
the sealing batten 12 extends upwards to form a circle of water baffle 121;
during detection, the coiled material is arranged at the upper opening of the main body box 1, the coiled material and the main body box 1 form a closed space, the sealing pressing strip 12 is used for fixing and sealing, and the water baffle 121 and the coiled material form a water storage structure.
The thickness face of main part box 1 opening part is equipped with one or more first fixed orificess 13, and sealing strip 12 corresponds and is equipped with one or more second fixed orificess 122, sealing strip 12, coiled material, main part box 1 wear to establish screw 2 fixed seal through first fixed orifices 13 and second fixed orifices 122.
The length of the main body box 1 is 0.3-0.8 meter, and the width is 0.3-0.8 meter.
The length and the width of the main body box 1 are both 0.5 meter.
The sealing pressing strip 12 is obtained by fixedly connecting 4 sectional materials with L-shaped cross sections.
The sealing pressing strip 12 is obtained by fixedly connecting 4 sections with inverted T-shaped cross sections.
Example 2: a method for detecting the water permeability of an enhanced coiled material in a polyester fiber fabric is characterized by comprising the following steps:
the method comprises the following steps:
the first step is used for simulating the pretreatment operation of the working state of the coiled material to be detected:
cutting a coiled material to be detected into 3 small coiled materials with the width of 0.1-0.3 m, sequentially splicing, paving and welding the 3 small coiled materials in the width direction to obtain a pretreated coiled material, wherein the width of the pretreated coiled material is more than 0.5 m, and the length of the pretreated coiled material is more than 0.5 m;
secondly, covering the pretreated coiled material above a transparent box which is 0.5 meter long and wide and is provided with an air extraction opening on the side surface, fixedly sealing the edge of an upper opening of the transparent box and the pretreated coiled material by using a circle of sealing pressing strip with an L-shaped or inverted T-shaped cross section to form a closed space, forming a water storage structure by using the sealing pressing strip with the L-shaped or inverted T-shaped cross section and the pretreated coiled material, pouring water in the water storage structure to ensure that the pretreated coiled material is soaked in water, connecting the air extraction opening on the transparent box by using a vacuum pump, and continuously extracting air under negative pressure;
and thirdly, checking whether water exists in the transparent box or not, and if no water is observed to penetrate through the pretreatment coiled material and drop into the transparent box, ensuring that the water permeability of the coiled material to be detected meets the water permeability requirement.
In the second step, negative pressure air extraction is carried out for 48 hours.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (9)
1. The utility model provides an instrument of enhancement mode coiled material water permeability in detecting polyester fiber fabric which characterized in that: comprises that
The main body box (1) is in a transparent box shape with an upper opening;
an air suction port (11) is formed in the side face of the main body box (1), and the air suction port (11) is used for being connected with a vacuum pump;
a circle of sealing pressing strips (12) are correspondingly arranged on four upward edges of an upper opening of the main body box (1);
the sealing batten (12) extends upwards to form a circle of water baffle (121);
during detection, the coiled material is arranged at the upper opening of the main body box (1), the sealing pressing strip (12) is used for fixing and sealing, a closed space is formed below the coiled material and the main body box (1), and the water baffle (121) and the coiled material form a water storage structure.
2. The apparatus of claim 1, wherein: the thickness face of main part box (1) opening part is equipped with one or more first fixed orificess (13), and sealing layering (12) correspond and are equipped with one or more second fixed orifices (122), screw (2) fixed seal is worn to establish through first fixed orifices (13) and second fixed orifices (122) in sealing layering (12), coiled material, main part box (1).
3. The apparatus of claim 1, wherein: the length of the main body box (1) is 0.3-0.8 m, and the width is 0.3-0.8 m.
4. The apparatus of claim 1, wherein: the length and the width of the main body box (1) are both 0.5 meter.
5. The apparatus of claim 1, wherein: the sealing pressing strip (12) is obtained by fixedly connecting 4 sectional materials with L-shaped cross sections.
6. The apparatus of claim 1, wherein: the sealing pressing strip (12) is obtained by fixedly connecting 4 sections with inverted T-shaped cross sections.
7. A method for detecting the water permeability of an enhanced coiled material in a polyester fiber fabric is characterized by comprising the following steps:
the method comprises the following steps:
the first step is used for simulating the pretreatment operation of the working state of the coiled material to be detected:
cutting a coiled material to be detected into 3 small coiled materials with the width of 0.1-0.3 m, sequentially splicing, paving and welding the 3 small coiled materials in the width direction to obtain a pretreated coiled material, wherein the width of the pretreated coiled material is more than 0.5 m, and the length of the pretreated coiled material is more than 0.5 m;
secondly, covering the pretreated coiled material above a transparent box which is 0.5 meter long and wide and is provided with an air extraction opening on the side surface, fixedly sealing the edge of an upper opening of the transparent box and the pretreated coiled material by using a circle of sealing pressing strip with an L-shaped or inverted T-shaped cross section to form a closed space, forming a water storage structure by using the sealing pressing strip with the L-shaped or inverted T-shaped cross section and the pretreated coiled material, pouring water in the water storage structure to ensure that the pretreated coiled material is soaked in water, connecting the air extraction opening on the transparent box by using a vacuum pump, and continuously extracting air under negative pressure;
and thirdly, checking whether water exists in the transparent box or not, and if no water is observed to penetrate through the pretreatment coiled material and drop into the transparent box, ensuring that the water permeability of the coiled material to be detected meets the water permeability requirement.
8. A method for detecting the water permeability of an enhanced coiled material in a polyester fiber fabric is characterized by comprising the following steps: in the second step, negative pressure air extraction is carried out for 48 hours.
9. An apparatus for use in the method of claim 7, wherein:
the main body box (1) is in a transparent box shape with an upper opening;
an air suction port (11) is formed in the side face of the main body box (1), and the air suction port (11) is used for being connected with a vacuum pump;
a circle of sealing pressing strips (12) are correspondingly arranged on four upward edges of the upper opening of the main body box (1);
the sealing pressing strip (12) extends upwards to form a circle of water baffle (121);
during detection, the upper opening of the main body box (1) is placed in the pre-processing coiled material, the sealing pressing strip (12) is used for fixing and sealing the upper opening edge of the main body box (1) and the pre-processing coiled material, a closed space is formed below the pre-processing coiled material and the main body box (1), and the water baffle plate (121) and the pre-processing coiled material form a water storage structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210757241.5A CN115078218A (en) | 2022-06-29 | 2022-06-29 | Instrument and method for detecting water permeability of enhanced coiled material in polyester fiber fabric |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210757241.5A CN115078218A (en) | 2022-06-29 | 2022-06-29 | Instrument and method for detecting water permeability of enhanced coiled material in polyester fiber fabric |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841020A (en) * | 2012-09-06 | 2012-12-26 | 中国水利水电科学研究院 | Test model and method for simulating capacity of resisting cracking caused by high-pressure water of flexible impermeable material |
| CN107063965A (en) * | 2017-03-23 | 2017-08-18 | 上海市建筑科学研究院(集团)有限公司 | A kind of wide span house cap flexible waterproof layer construction and impervious experimental provision |
| CN208283194U (en) * | 2018-04-19 | 2018-12-25 | 山东普文特建材有限公司 | A kind of waterproof roll water permeabillity test instrument |
| CN209764678U (en) * | 2019-04-28 | 2019-12-10 | 温州际高检测仪器有限公司 | simple waterproof coiled material anti-channeling water tester |
| CN210288100U (en) * | 2019-05-23 | 2020-04-10 | 何彩平 | Modified asphalt waterproof coiled material for roads and bridges |
| CN212514161U (en) * | 2020-06-28 | 2021-02-09 | 海南方能测试技术有限公司 | Concrete water permeability coefficient detection device |
| CN113155557A (en) * | 2021-01-27 | 2021-07-23 | 中国建材检验认证集团苏州有限公司 | Waterproof coiled material seam water impermeability detection method |
| CN214894750U (en) * | 2021-06-25 | 2021-11-26 | 云南欣城防水科技有限公司 | Waterproofing membrane leakage performance detection device |
| CN114112847A (en) * | 2021-11-24 | 2022-03-01 | 福建省方正工程技术有限公司 | Building material detection device for building construction and working method thereof |
-
2022
- 2022-06-29 CN CN202210757241.5A patent/CN115078218A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841020A (en) * | 2012-09-06 | 2012-12-26 | 中国水利水电科学研究院 | Test model and method for simulating capacity of resisting cracking caused by high-pressure water of flexible impermeable material |
| CN107063965A (en) * | 2017-03-23 | 2017-08-18 | 上海市建筑科学研究院(集团)有限公司 | A kind of wide span house cap flexible waterproof layer construction and impervious experimental provision |
| CN208283194U (en) * | 2018-04-19 | 2018-12-25 | 山东普文特建材有限公司 | A kind of waterproof roll water permeabillity test instrument |
| CN209764678U (en) * | 2019-04-28 | 2019-12-10 | 温州际高检测仪器有限公司 | simple waterproof coiled material anti-channeling water tester |
| CN210288100U (en) * | 2019-05-23 | 2020-04-10 | 何彩平 | Modified asphalt waterproof coiled material for roads and bridges |
| CN212514161U (en) * | 2020-06-28 | 2021-02-09 | 海南方能测试技术有限公司 | Concrete water permeability coefficient detection device |
| CN113155557A (en) * | 2021-01-27 | 2021-07-23 | 中国建材检验认证集团苏州有限公司 | Waterproof coiled material seam water impermeability detection method |
| CN214894750U (en) * | 2021-06-25 | 2021-11-26 | 云南欣城防水科技有限公司 | Waterproofing membrane leakage performance detection device |
| CN114112847A (en) * | 2021-11-24 | 2022-03-01 | 福建省方正工程技术有限公司 | Building material detection device for building construction and working method thereof |
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