CN113375877A - Pressure tank testing device and method for loss evaluation after fabric test - Google Patents
Pressure tank testing device and method for loss evaluation after fabric test Download PDFInfo
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- CN113375877A CN113375877A CN202110717363.7A CN202110717363A CN113375877A CN 113375877 A CN113375877 A CN 113375877A CN 202110717363 A CN202110717363 A CN 202110717363A CN 113375877 A CN113375877 A CN 113375877A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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Abstract
本发明涉及一种用于面料试验后损失评估的压力罐测试装置及方法，该装置包括：压力罐、样品夹持装置、真空开关阀、真空泵和压力表；所述样品夹持装置固定于所述压力罐的开口上方，所述压力罐的底部侧面开口通过管路连接一个三通，所述三通的一端连接所述真空开关阀，并通过管路连接到所述真空泵，通过所述真空开关阀的开关切换来进行压力罐抽真空和停止抽真空保持密闭等两个状态的切换，所述三通的另一端所述压力表，用于监测所述压力罐内部压力变化。本发明将样品夹持固定在压力罐的开口上方，可通过抽真空后观察记录压力罐的压力变化的方式来对样品的防护性能进行评估，提升了测试准确度和精度，并且扩大了评估的适用范围。
The invention relates to a pressure tank testing device and method for evaluating the loss after a fabric test. The device comprises: a pressure tank, a sample holding device, a vacuum switch valve, a vacuum pump and a pressure gauge; the sample holding device is fixed on the Above the opening of the pressure tank, the bottom side opening of the pressure tank is connected to a tee through a pipeline, one end of the tee is connected to the vacuum switch valve, and is connected to the vacuum pump through a pipeline, and the vacuum The switch of the on-off valve is used to switch between two states, such as vacuuming the pressure tank and stopping the vacuuming and keeping it closed. The pressure gauge at the other end of the three-way is used to monitor the pressure change inside the pressure tank. In the invention, the sample is clamped and fixed above the opening of the pressure tank, and the protection performance of the sample can be evaluated by observing and recording the pressure change of the pressure tank after vacuuming, which improves the test accuracy and precision, and expands the evaluation range. Scope of application.
Description
Technical Field
The invention relates to the field of fabric testing devices, in particular to a pressure tank testing device for evaluating loss of coated or film-coated protective clothing fabric after abrasion and deflection resistance tests and a corresponding testing method.
Background
After the protective clothing fabric is subjected to abrasion resistance tests with certain strength and times or deflection resistance tests with certain strength and times according to a standard method, the conditions of structural damage and functional damage of the clothing fabric subjected to abrasion and deflection need to be qualitatively and quantitatively evaluated.
The existing evaluation method mainly depends on visual observation of damage conditions (yarn breakage and number, surface fluff exposure, aperture reaching 0.5mm, and the like) of the garment material by a tester to carry out qualitative judgment and evaluation, and the judgment result is greatly influenced by the personal physical quality and experience of the tester. Although the accuracy of the evaluation results can be greatly improved by means of microscopic and magnifying equipment and by means of the experience of the test personnel, the evaluation results are still limited by personal experience and no case is found in which the wearing and protective functions of the surface are lost and significantly reduced despite the absence of the above-mentioned delicate circumstances.
Another method that can be used for discrimination and evaluation is hydrostatic pressure. And covering and loading the fabric abraded or flexed by the standard method and fixing the fabric on the pressure-bearing side of the hydrostatic pressure testing device. Under the standard atmospheric pressure, filling water into the pressurized side at a certain pressurizing speed ((0.98 +/-0.05) kPa/min) and pressurizing, and simultaneously, visually observing whether three exuded water drops are formed on the other pressurized side of the fabric by a tester. On the one hand, the method is still influenced by the visual observation ability and experience of a tester. However, the more important limitation of this method is that since three water beads must be formed to be exuded for determination, in most cases, the tested fabric must satisfy a certain hydrostatic pressure condition (such as a hydrostatic pressure greater than 200 mm) before being resistant to abrasion or flexing so as to perform a distinctive comparison and determination evaluation on the fabric before and after the fabric is resistant to abrasion or flexing.
Disclosure of Invention
Aiming at the technical problems, the invention provides a pressure tank testing device and a corresponding testing method for evaluating the loss of coated or film-coated protective clothing fabric after abrasion resistance and flexing resistance tests, so that the two methods of the apparent observation evaluation method and the hydrostatic pressure method are prevented from being greatly influenced by the factors of the main charge of a tester, the testing accuracy and precision are improved, the problem that the hydrostatic pressure method cannot test the fabric with the hydrostatic pressure less than 200mm is solved, and the application range of evaluation is expanded.
The technical scheme for solving the technical problems is as follows:
a pressure tank testing arrangement for loss assessment after fabric testing includes: the device comprises a pressure tank, a sample clamping device, a vacuum switch valve, a vacuum pump and a pressure gauge; the sample clamping device is fixed above an opening of the pressure tank, the bottom side opening of the pressure tank is connected with a tee joint through a pipeline, one end of the tee joint is connected with the vacuum switch valve and is connected with the vacuum pump through a pipeline, the switching of two states of vacuumizing the pressure tank and keeping the vacuumizing to be closed is carried out through switching of a switch of the vacuum switch valve, and the other end of the tee joint is the pressure gauge and used for monitoring the pressure change inside the pressure tank.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, the device also comprises a timer, wherein the timer is connected with the pressure gauge and used for receiving the signal output by the pressure gauge.
Further, sample clamping device includes gasket, gasket and fastening component under gasket on the sample, the open-top of overhead tank has the platform of outside extension, gasket, sample on gasket and the fastening component from the bottom up assemble fixedly in proper order under the opening and the platform of overhead tank, the sample.
Further, the device still includes the gas tightness inspection board, opening and platform, sample lower gasket, gas tightness inspection board, sample upper gasket and the fastening component of overhead tank are assembled fixedly in proper order from the bottom up.
Furthermore, the fastening part is a fixing piece which is fixed with the platform of the pressure tank opening through a compression screw.
Further, a transparent window with a vent hole in the middle is further arranged between the sample upper gasket and the fixing piece, and the sample upper gasket, the sample lower gasket and the fixing piece are all in the shape of a ring with the same size.
Further, fastening part includes first bracing piece, second bracing piece, screw dead lever, elevating screw, pressure disk and hand wheel, first bracing piece and second bracing piece are fixed respectively the both sides of overhead tank, the screw dead lever is fixed top, overhead tank opening top of first bracing piece and second bracing piece, elevating screw passes screw in the middle of the screw dead lever, the pressure disk is fixed elevating screw's bottom, the hand wheel is installed elevating screw's top, through rotating the hand wheel can drive elevating screw and terminal pressure disk make progress or downstream and press to loosen or compress tightly the sample.
Furthermore, the number of the pressure tanks is two, and the device further comprises a vacuum pumping change-over switch for switching the vacuum pump to respectively pump air from the two pressure tanks.
Further, the two pressure tanks are respectively a circular pressure tank and a rectangular pressure tank, wherein the circular pressure tank is used for testing a sample subjected to a wear resistance test; the rectangular pressure tank is used for testing samples subjected to a flexing resistance test.
In order to achieve the purpose, the invention also provides a pressure tank testing method for evaluating the loss of the fabric after the test by using the device, which comprises the following steps:
1) firstly clamping an air tightness inspection plate in the middle of a sample clamping device, fixing the sample clamping device clamped with the air tightness inspection plate above an opening of a pressure tank, then starting a vacuum pump to pump the pressure tank, closing a vacuum switch valve when the reading of a pressure gauge reaches 1050-;
2) replacing an air tightness inspection plate with a complete sample which is not subjected to the wear-resistant and deflection-resistant tests, clamping the sample in the middle of a sample clamping device, fixing the sample clamping device with the sample above an opening of a pressure tank, ensuring that a wear-resistant and deflection-resistant surface of the sample is positioned on one side with pressure, then starting a vacuum pump to pump the pressure tank, closing a vacuum switch valve when the reading of a pressure gauge is greater than 1050-1200Pa, then measuring and recording the maximum value of pressure change after 1min when the pressure gauge shows that the pressure in the pressure tank is reduced from atmospheric pressure to- (1000 +/-10) Pa, and if the maximum value is less than 100Pa, determining that the fabric can be used for a pressure tank system to perform air tightness test;
3) clamping a sample subjected to a wear-resistant or deflection-resistant test in the middle of a sample clamping device, fixing the sample clamping device with the sample clamped above an opening of a pressure tank, ensuring that a wear-resistant and deflection-resistant surface of the sample is positioned on one side with pressure, then starting a vacuum pump to pump air out of the pressure tank, closing a vacuum switch valve when the reading of a pressure gauge is greater than 1050-1200Pa, then when the pressure gauge shows that the pressure in the pressure tank is reduced from atmospheric pressure to- (1000 +/-10) Pa, measuring and recording the maximum value of pressure change after 1min, calculating the difference value of the maximum values of two successive pressure tank tests of the sample, and if the difference value is not greater than 100Pa, judging the number of times that the sample can pass through the pressure tank under the wear number or the deflection number;
4) and continuously increasing the abrasion times or the flexion times according to the increase gradient of the abrasion times or the flexion times required by the standard, calculating the difference value of the maximum values of the pressure tank tests before and after the abrasion resistance test or the flexion resistance test of the sample, and evaluating until the difference value is more than 100Pa, wherein the result shows that the protective performance of the sample cannot meet the requirement after the abrasion times or the flexion times.
The invention has the beneficial effects that: fix the sample centre gripping in the opening top of overhead tank, the mode of the pressure change of observation record overhead tank after the accessible evacuation evaluates the barrier propterty of sample, has promoted testing accuracy and precision to the application scope who assesses has been enlarged.
Drawings
Fig. 1 is a schematic structural diagram of a pressure tank testing device according to an embodiment of the present invention;
FIG. 2 is a side cross-sectional view of a sample holding device provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another pressure tank testing device provided in the embodiment of the present invention;
FIG. 4 is a side view of another pressure tank testing apparatus provided in accordance with an embodiment of the present invention;
FIG. 5 is a top view of a pressure tank test fixture utilizing a first type of structural fastener member according to embodiments of the present invention;
FIG. 6 is a top view of a pressure tank test fixture utilizing a second configuration of fastening components in accordance with an embodiment of the present invention;
FIG. 7 is a side view of a pressure tank testing apparatus employing a second configuration of fastening components in accordance with an embodiment of the present invention.
Reference numerals: 1. a pressure tank; 11. a circular pressure tank; 12. a rectangular pressure tank; 2. a sample holding device; 21. a pad on the sample; 22. a sample lower pad; 23. a fastening member; 230. a compression screw; 231. a first support bar; 232. a second support bar; 233. a nut fixing rod; 2331. a nut; 234. lifting a screw rod; 235. a platen; 236. a hand wheel; 3. a vacuum switching valve; 4. a vacuum pump; 41. a vacuum pump switch; 5. a pressure gauge; 6. a tee joint; 7. a sample; 8. a transparent window; 81. a vent hole; 9. a vacuum pumping change-over switch; 10. a timer.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Fig. 1 is a schematic structural diagram of a pressure tank testing apparatus for loss evaluation after fabric test according to an embodiment of the present invention, as shown in fig. 1, the apparatus includes: the device comprises a pressure tank 1, a sample clamping device 2, a vacuum switch valve 3, a vacuum pump 4 and a pressure gauge 5; sample clamping device 2 is fixed in the opening top of overhead tank 1, and overhead tank 1's bottom side opening passes through tee bend 6 of tube coupling, and vacuum switch valve 3 is connected to the one end of tee bend 6 to through tube coupling to vacuum pump 4, switch through vacuum switch valve 3's switch switches and carries out the switching that overhead tank evacuation and stop the evacuation and keep two states such as airtight, and tee bend 6's other end manometer 5 is used for monitoring the change of 1 internal pressure of overhead tank.
According to the pressure tank testing device for loss evaluation after the fabric test, provided by the embodiment of the invention, the sample is clamped and fixed above the opening of the pressure tank, and then the protection performance of the sample is evaluated in a manner of observing and recording the pressure change of the pressure tank after the pressure tank is vacuumized, so that the two methods of an existing apparent observation evaluation method and a hydrostatic method are prevented from being greatly influenced by the factors of the main pipe of a tester, the testing accuracy and precision are improved, the problem that the fabric with hydrostatic pressure smaller than 200mm cannot be tested by the hydrostatic method is solved, and the application range of evaluation is expanded.
Alternatively, in this embodiment, as shown in fig. 2, the sample holding device 2 comprises a sample upper pad 21, a sample lower pad 22 and a fastening component 23, the top opening of the pressure tank 1 is provided with an outward expanding platform, and the opening and the platform of the pressure tank 1, the sample lower pad 22, the sample 7, the sample upper pad 21 and the fastening component 23 are assembled and fixed in sequence from bottom to top.
Specifically, the sample gasket can adopt the silicon rubber material, and gasket, sample lower gasket are the annular of equidimension on the sample, and the loop configuration of two upper and lower gaskets can guarantee sample surface fabric and vacuum tank inner space and keep contacting to can fix and keep the natural state of tiling with sample surface fabric centre gripping.
Optionally, in this embodiment, the apparatus further comprises an air tightness checking plate, and the opening and platform of the pressure tank 1, the lower sample gasket 22, the air tightness checking plate, the upper sample gasket 21 and the fastening member 23 are assembled and fixed in sequence from bottom to top. The air tightness inspection plate is used for carrying out air tightness inspection on the pressure tank before the pressure tank test is carried out.
Optionally, a transparent window 8 for protecting and observing the sample is further installed between the upper gasket and the fixing sheet of the sample, and in order to avoid the influence on the pressure value when the pressure tank is vacuumized, the middle of the transparent window 8 is provided with an air vent 81, as shown in fig. 5 and 6.
Alternatively, in this embodiment, the pressure tank 1 is made of stainless steel, and as shown in fig. 3, the number of the pressure tanks 1 may be two, namely, a circular pressure tank 11 and a rectangular pressure tank 12, wherein the circular pressure tank is used for testing a sample subjected to a wear resistance test; the rectangular pressure tanks are used for testing samples after the flexing resistance test, and the device further comprises a vacuum pumping change-over switch 9 used for switching the vacuum pump to respectively pump air to the two pressure tanks.
As shown in fig. 4, the circular pressure tank 11 and the rectangular pressure tank 12 are embedded in a box, the vacuum switch valve 3, the vacuum pump 4 and the connecting pipeline can be arranged in the box, as shown in fig. 5 and 6, the display interface of the pressure gauge 5 and the operation mechanism of the vacuum pumping change-over switch 9 are arranged on the upper surface of the box, and in addition, the vacuum pump switch 41 is further arranged on the upper surface of the box, so that an operator can observe the reading of the pressure gauge and perform corresponding operation.
Accordingly, in this embodiment, the sample pad may be circular and rectangular, for use with two pressure tanks, respectively, wherein the circular sample pad is a circular ring having an inner diameter of 82mm and an outer diameter of 105 mm; rectangular sample pad size rectangular ring, inner ring size 30mm 80mm, outer ring 50mm 105 mm.
In the embodiment, the pressure tanks with the circular shape and the rectangular shape are respectively suitable for a circular fabric sample subjected to a wear-resistant test and a rectangular fabric sample subjected to a flex-resistant test, the specification and the size of the articles used in the pressure tank testing method are completely consistent with those of the wear-resistant test sample and the flex-resistant test sample, the sample regions subjected to the wear-resistant test and the flex-resistant test are fully utilized and tested and evaluated, and seamless butt joint, namely no waste and insufficient investigation area are realized. In contrast, the applied area of the hydrostatic testing equipment is basically fixed to several specifications, the shape of the applied area is basically circular, and the area of a test sample is either wasted or insufficient for investigation and evaluation.
Optionally, in this embodiment, as shown in fig. 1, the apparatus further includes a timer 10, and the timer 10 is connected to the pressure gauge 5 and is configured to receive a signal output by the pressure gauge 5. The timer 10 automatically starts to count time when the pressure gauge 5 reads 1000 Pa. As shown in fig. 5 and 6, the display interface of the timer 10 is disposed on the upper surface of the casing so that the operator can observe the timing.
Alternatively, in this embodiment, the fastening member 23 has the following two structures:
the fastening part 23 of the first structure employs a fixing piece, as shown in fig. 5, which is screwed with screw holes formed on the fixing piece and the platform of the opening of the pressure vessel so that the fixing piece is fixed with the platform of the opening of the pressure vessel by a pressing screw 230, and in addition, the fixing piece employs a ring shape having the same shape and size as the upper and lower pads of the sample.
As shown in fig. 7, the fastening member 23 of the second structure includes a first support rod 231, a second support rod 232, a nut fixing rod 233, a lifting screw 234, a pressure plate 235 and a hand wheel 236, wherein the first support rod 231 and the second support rod 232 are respectively fixed on two sides of the pressure tank 1, the nut fixing rod 233 is fixed on the top of the first support rod 231 and the second support rod 232 and above the opening of the pressure tank 1, the lifting screw 234 passes through the nut 2331 in the middle of the nut fixing rod 233, the pressure plate 235 is fixed on the bottom of the lifting screw 234, the hand wheel 236 is mounted on the top of the lifting screw 234, and by rotating the hand wheel 236, the lifting screw 234 and the pressure plate 235 at the end thereof can be driven to move upwards or downwards and press, so as to loosen or press the sample.
The testing device comprises two pressure tank testing systems, wherein the circular pressure tank testing system is used for testing a sample subjected to a wear resistance test; the rectangular pressure tank test system is used for testing samples subjected to the flexing resistance test. The two sets of test systems respectively and independently run and share a vacuum pump, a pressure gauge, a timer and the like. The operation principle and process are described by taking a circular pressure tank as an example, and the operation principle and process of the test of the rectangular pressure tank are basically the same.
The test principle and process of the circular pressure tank are as follows:
1) the air tightness inspection plate is clamped between the two sample clamping rings instead of a sample, then the air tightness inspection plate is loaded into the circular pressure tank, and the fastening wrench is slowly rotated to ensure compaction. And then starting a vacuum pump to pump the circular pressure tank (ensuring that the rectangular pressure tank vacuum switch valve is in a closed state), and closing the pressure tank vacuum switch valve when the reading of the pressure gauge is greater than 1050 and 1200 Pa. Thereafter, when the pressure gauge indicated that the pressure in the round pressure tank was reduced from atmospheric pressure to- (1000. + -. 10) Pa, the change in pressure after 1min was measured and recorded. If the pressure increase is less than 20Pa, the round pressure tank system is confirmed to be in a good airtight state.
2) The intact specimen to be tested (not subjected to any loss tests such as abrasion or flex tests) was clamped in place of the airtight pressure check plate in the middle of the specimen-clamping ring. The sample and the clamping ring are loaded to one end of the opening of the circular pressure tank together, so that the abrasion-resistant and deflection-resistant surface (namely the outer side surface of the garment) of the sample is positioned on the side with pressure, the fastening wrench is slowly rotated to ensure compaction, but the sample fabric is not subjected to distortion deformation (the sample is ensured to be tiled without deformation such as folds, depressions and the like). And then starting a vacuum pump to pump the circular pressure tank (ensuring that the rectangular pressure tank vacuum switch valve is in a closed state), and closing the pressure tank vacuum switch valve when the reading of the pressure gauge is greater than 1050 and 1200 Pa. Thereafter, when the pressure gauge indicated that the pressure in the round pressure tank was reduced from atmospheric pressure to- (1000. + -. 10) Pa, the maximum value of the pressure change after 1min was measured and recorded. If the maximum value is less than 100Pa, the fabric is confirmed to be usable for a circular pressure tank system for air tightness tests.
3) The sample after the abrasion resistance test (Martindale tester, the sample is placed on a grinding table, 9N downward force is loaded on an abrasive, one complete Lisharu curve is taken as a cycle, the number of abrasion cycles of each sample is recorded, the sample is loaded on a circular pressure tank, a sample clamping ring (an upper piece and a lower piece) is used for fixing the sample, the abrasion resistance and flex resistance surfaces (namely the outer side surface of the garment) of the sample are ensured to be positioned on one side of the pressure, a fastening wrench is slowly rotated to ensure the compaction, but the sample fabric is not required to be distorted and deformed (the sample is ensured to be tiled without deformation such as wrinkles and depressions). And then starting a vacuum pump to pump the circular pressure tank (ensuring that the rectangular pressure tank vacuum switch valve is in a closed state), and closing the pressure tank vacuum switch valve when the reading of the pressure gauge is greater than 1050 and 1200 Pa. Thereafter, when the pressure gauge indicated that the pressure in the round pressure tank was reduced from atmospheric pressure to- (1000. + -. 10) Pa, the maximum value of the pressure change after 1min was measured and recorded. Calculating the difference of the maximum values of the two pressure tank tests before and after the sample is worn, and if the difference of the maximum values of the pressure tank tests before and after the sample is worn at the wear times is not more than 100Pa, judging that the sample can pass through the pressure tank times at the wear times, wherein the damage condition of the sample after the wear test is not enough to destroy the protection function of the sample.
4) And increasing the gradient of the abrasion times according to the standard requirement, continuously increasing the abrasion times, carrying out the difference of the maximum values of the pressure tank tests before and after the abrasion test of the sample, and evaluating until the difference is more than 100Pa, which indicates that the sample is seriously abraded and the protective performance can not meet the requirement after the abrasion times.
This patent pressure tank testing arrangement is mainly to coating or tectorial membrane protective clothing surface fabric for investigate this surface fabric after stand wear and tear or resistant flex test, the damaged degree of surface fabric surface and structure, whether still keep enough gas tightness, and give quantitative assessment result.
Compared with a hydrostatic method and an experience and visual observation method, the pressure tank method has more objectivity in the test process, does not need observation of the tester for evaluation, is not limited to the fact that a sample to be tested has a certain local hydrostatic pressure, and quantitatively evaluates the performance of the facing material after the pressure tank method relies on the reading of a pressure gauge to calculate, so that the test precision and the accuracy of the method are improved.
The coated or film-coated protective clothing fabric is mainly used for chemical protective clothing which is worn by operators aiming at chemicals under dangerous operation environments and emergency disposal personnel after sudden dangerous chemical substance disaster accidents, and objective and accurate test and performance evaluation are carried out on the protective clothing, so that the life and safety and health of the operators and emergency rescue personnel are directly related. Therefore, the method is objective, reliable and accurate, and has great significance for emergency rescue and safety production industry management and industrial individual protection work in China.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
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| CN212674386U (en) * | 2020-07-06 | 2021-03-09 | 东莞市蓉工自动化科技有限公司 | Medical protective clothing leakproofness check out test set |
| CN111721655A (en) * | 2020-07-20 | 2020-09-29 | 浙江绿驴检测技术服务有限公司 | Garment materials wearing resistance degree detection device |
| CN215726630U (en) * | 2021-06-28 | 2022-02-01 | 中国安全生产科学研究院 | Pressure tank testing device for loss assessment after fabric test |
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