CN110954474A - A filter material coating fastness testing device and testing method thereof - Google Patents
A filter material coating fastness testing device and testing method thereof Download PDFInfo
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Abstract
本发明公开了一种滤料覆膜牢度测试装置及其测试方法，涉及针刺非织造过滤材料覆膜牢度测试技术领域。本发明中：包括测试平台与样品，由四部分组成：透气部分、样品固定部分、气体发生部分合摩擦部分；传动联系压杆的端侧安装有测试头；测试头的边缘侧设置有用于手动调节测试头位置的手压柄；空心环套上卡合有与样品相配合的弧形金属筛网；下气室下方连接有与下气室相连通的软管；软管底端侧连接有风机装置；滑槽上活动安装有在滑槽上往返运动的铰接支块；铰接支块上活动连接有转臂；转臂的一端装设有磨盘。本发明该装置结构简单，操作安全便捷，可控性好，能够真正地反映出不同针刺非织造材料的覆膜牢度。
The invention discloses a filter material coating fastness testing device and a testing method thereof, and relates to the technical field of acupuncture non-woven filter material coating fastness testing. In the present invention, it includes a test platform and a sample, and consists of four parts: a breathable part, a sample fixing part, a gas generating part and a friction part; a test head is installed on the end side of the transmission link pressure rod; the edge side of the test head is provided with a manual A hand pressure handle for adjusting the position of the test head; the hollow ring sleeve is clamped with an arc-shaped metal screen matched with the sample; a hose connected to the lower air chamber is connected below the lower air chamber; the bottom end side of the hose is connected with a A fan device; a hinged support block that moves back and forth on the chute is movably installed on the chute; a rotating arm is movably connected to the hinged support; one end of the rotating arm is provided with a grinding disc. The device of the invention has the advantages of simple structure, safe and convenient operation, and good controllability, and can truly reflect the film-covering fastness of different acupuncture non-woven materials.
Description
Technical Field
The invention relates to the technical field of testing the film fastness of a needle-punched non-woven filter material, in particular to a device and a method for testing the film fastness of a filter material.
Background
In recent years, the national degree of controlling the emission of industrial smoke dust is increased, and the emission concentration of the industrial smoke dust is required to be less than 30mg/m in the emission standard of atmospheric pollutants of thermal power plants (GB13223-2011)3The emission of the key area needs to be less than 20mg/m3Some enterprises with ultra-low emission even require the concentration to be less than 5mg/m3Therefore, higher requirements are put forward for industrial enterprises and environment-friendly filter material enterprises. The laminated bag type acupuncture filter material is a high-performance and high-precision environment-friendly dust removal filter material which appears in recent years, a PTFE film on the surface of the laminated bag type acupuncture filter material has the function of a primary dust layer, effective filtration can be carried out at the beginning of use, and compared with an electric dust collector, the laminated bag type acupuncture filter material has a better dust collection effect on micro-dust below 2 mu m. However, the thickness of the PTFE microporous membrane is only dozens of microns, and the fluctuation of technological parameters such as the drafting stress, the roller pressure and the like in the membrane covering process, the impurity protrusions on the surface of the fiber filter material and the like can affect the membrane covering fastness and the integrity of the microporous membrane, thereby affecting the filtering effect of the filter bag. At present, enterprises at home and abroad have no uniform test standard for the film covering fastness, so that the performance representation is disordered.
The prior patent is as follows: a device for testing the film-covering fastness (No. CN206369685U) utilizes constant-temperature gas to pass through a film-covering filter material, observes the peeling condition of the film, and the corresponding gas pressure when the film is peeled from a filter material base cloth is the film-covering fastness of the filter material. The method uses a base cloth with a completely stripped film as a standard to characterize the film fastness, but the film stripping of a plurality of samples often occurs in the test, but the film stripping area does not reach the specified film stripping area, so that the test result has serious deviation.
The prior patent is as follows: a testing device (application publication number: CN106124399A) for the laminating fastness of a membrane-coated air filter felt is characterized in that the pressure of air in a testing cavity is gradually increased, a microprocessor draws the pressure into a pressure-time curve, and when the pressure-time curve deviates from the original curve variation trend, the pressure corresponding to an inflection point is the laminating fastness of a tested membrane-coated filter material. However, according to the specific embodiment, the film fastness of the film-coated air filter felt made of different materials is mostly greater than or equal to 0.1MPa, and the difference of the film fastness of the filter materials made of different materials cannot be shown. And the method uses the gas pressure to represent the film-covering fastness, and the gas pressure is generally about 0.1MPa in the test process, which has high requirements on the precision and the reading of the instrument.
Disclosure of Invention
Aiming at the problems of the traditional filter material film-covering fastness testing device and method, the invention provides the device and method for testing the film-covering fastness of the needle-punched non-woven filter material.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention provides a filter material laminating fastness testing device, which comprises a testing platform and a sample, and consists of four parts: the gas-permeable part, the sample fixing part and the gas generating part are combined and rubbed; the air permeability part comprises a control console arranged on the test platform, and a display screen for displaying the air permeability of the sample in the air permeability test process in real time is arranged on the control console; one side of the control console is provided with a transmission connection pressure lever; the end side of the transmission linkage pressure lever is provided with a test head; the edge side of the test head is provided with a hand handle for manually adjusting the position of the test head.
The sample fixing part comprises a ring sleeve inner core fixedly arranged on the test platform; a hollow ring sleeve with internal threads is rotatably arranged on the ring sleeve inner core; the hollow ring sleeve is clamped with an arc metal screen matched with the sample.
The gas generating part comprises an air inlet cylinder positioned on the test platform; the upper side of the air inlet cylinder is communicated with an inner groove of the inner core of the ring sleeve; an upper air chamber communicated with the air inlet cylinder is arranged below the air inlet cylinder; a lower air chamber communicated with the upper air chamber is arranged below the upper air chamber; a hose communicated with the lower air chamber is connected below the lower air chamber; the bottom end side of the hose is connected with a fan device.
The friction part comprises a sliding groove arranged on the upper side surface of the test platform; a hinged support block which moves back and forth on the sliding groove is movably arranged on the sliding groove; the hinged support block is movably connected with a rotating arm; one end of the rotating arm is provided with a grinding disc.
As a preferred technical scheme of the invention, the inner diameter of the test head is matched with the outer diameter of the hollow ring sleeve.
As a preferred technical scheme of the invention, a sealing ring is arranged between the hollow ring sleeve and the inner core of the ring sleeve; the outer ring side of the ring sleeve inner core is provided with an external thread matched with the thread on the inner side of the hollow ring sleeve.
As a preferred technical scheme of the invention, the upper air chamber and the lower air chamber are both provided with dust screens; an airflow nozzle is arranged between the upper air chamber and the lower air chamber; the fan device adopts a vacuum-pumping fan.
As a preferred technical scheme of the invention, a power driving device for driving the hinge support block to move back and forth is arranged in the test platform; the grinding disc is provided with a notch structure matched with the state of the sample supported by the arc-shaped metal screen.
A filter material membrane fastness test method comprises the following steps:
firstly, cutting a film-coated sample to ensure that the diameter of the film-coated sample is slightly smaller than the inner diameter of the hollow ring sleeve;
secondly, cutting an arc-shaped metal screen with the same size as the sample of the film-coated sample;
thirdly, screwing down the hollow ring sleeve of the sample fixing part from the inner core of the ring sleeve;
fourthly, placing the metal screen on a film covering sample, and fixing the metal screen and the film covering sample in a hollow ring sleeve, wherein the film covering surface of the film covering sample is the lower surface; after the sealing ring is added, the hollow ring sleeve is rotationally fixed on the ring sleeve inner core of the sample testing platform again;
fifthly, opening a test control power supply on the ventilation part, setting test wind pressure and opening a fan device of the gas generating device; after the pressure value on the display screen is stabilized, manually pressing down the hand handle to a horizontal position, carrying out air permeability test, and reading the air permeability of the sample;
sixthly, lifting a hand handle in the air permeable part to a vertical position, closing a power supply of a fan device of the gas generating device, putting down a rotating arm of the wear-resistant part to enable the notch position of the grinding disc to be in contact with the surface of the sample, then starting a power control power switch of the wear-resistant part, setting corresponding friction times, and starting a friction experiment;
seventhly, after the grinding disc automatically stops moving, closing a power control power switch of the friction part, manually lifting the rotating arm, and then repeating the fifth step;
eighthly, circularly performing the ventilation operation and the friction test operation until the air permeability of the sample exceeds 130 percent of the initial test value, and stopping the experiment; the number of rubbing times at this time is the film fastness of the sample.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, samples with corresponding sizes are clamped on the hollow ring sleeve, the contact area of the samples is quantified, corresponding friction is carried out, and the friction times when corresponding air permeability increasing values are reached are represented as the film covering fastness; compared with other film covering fastness testing methods, the testing device disclosed by the invention is simple in structure, simple and convenient to operate and higher in reliability of a testing result;
2. according to the invention, the arc-shaped metal screen is adopted to support the sample in a shape, and the hollow ring sleeve is screwed and installed on the inner core of the ring sleeve, so that the sample is convenient and stable to install and is convenient to disassemble and replace quickly; and the grinding disc with the notches is adopted to rub the sample, so that the sample can be conveniently, quickly and reliably tested.
Drawings
FIG. 1 is a schematic structural diagram of a filter material laminating fastness testing device according to the present invention;
FIG. 2 is a schematic diagram of the structure of a part of the apparatus of the present invention;
FIG. 3 is a schematic view of the structure on side M of FIG. 1 (after the test head is pressed);
wherein: 1-a console; 2-a transmission linkage pressure lever; 3-a test head; 4-hand pressing handle; 5-ring sleeve inner core; 6-arc metal screen mesh; 7-a hollow ring sleeve; 8-sealing ring; 9-an air inlet cylinder; 10-upper air chamber; 11-lower air chamber; 12-dust screen; 13-an air flow nozzle; 14-a hose; 15-a fan device; 16-a hinge support block; 17-a tumbler; 18-a chute; 19-grinding disc; 20-a display screen; 21-sample.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specific example 1:
a filter material tectorial membrane fastness testing arrangement mainly comprises four bibliographic categories: the gas permeable part, the sample fixing part, the gas generating part and the friction part are as follows:
the ventilating part comprises a control console 1, a display screen 20, a transmission connection pressure rod 2 (a mechanical transmission device connection pressure rod), a test head 3 and a hand press handle 4; the display screen 20 is fixed on the console 1 and can reflect the air permeability of the sample in the air permeability testing process in real time; the test head 3 is connected with the control console through the compression bar 2, and the inner diameter of the test head 3 is matched with the outer diameter of the hollow ring sleeve 7. During testing, the test head 3 is tightly sealed with the edge of the sample 21 by manually pressing the hand grip 4 at the edge of the test head 3.
The sample fixing part is a detachable threaded hollow ring sleeve device, wherein the ring sleeve inner core 5 is fixed on the test platform, and the outer ring of the hollow ring sleeve 7 is detachable so as to fix the sample.
The gas generating part comprises an air inlet cylinder 9, an upper air chamber 10, a lower air chamber 11, a dust screen 12, an airflow nozzle 13, a hose 14 and a fan 15, wherein the lower end of the air inlet cylinder 9 is connected with the upper air chamber 10, the dust screen 12 is arranged in the middle of the air inlet cylinder, the airflow nozzle 13 is arranged in the middle of the upper air chamber and the lower air chamber, the lower part of the lower air chamber 11 is connected with the fan 15 through the dust screen 12 and the hose 14, and the fan device 15 is a vacuum-pumping fan.
The friction part comprises a hinged support block 16, a rotating arm 17, a sliding groove 18 and a grinding disc 19, wherein the sliding groove 18 is arranged on the test platform 1, and the hinged support block 16 horizontally reciprocates in the sliding groove 18 in the wear-resisting test process to drive the rotating arm 17 to enable the grinding disc 19 at the top of the hinged support block to generate required friction motion.
Specific example 2:
the invention also provides a method for testing the filter material laminating fastness, which comprises the following steps:
(1) cutting a film-coated sample 21, wherein the diameter of the sample 21 is slightly smaller than the inner diameter of the hollow ring sleeve 7; (2) cutting an arc-shaped metal screen 6 with the same size; (3) screwing off the hollow ring sleeve 7 of the sample fixing part; (4) placing the arc-shaped metal screen 6 on a sample 21, and fixing the arc-shaped metal screen and the sample in a hollow ring sleeve 7, wherein the surface of the sample 21 is the lower surface; after the sealing ring 8 is added, the hollow ring sleeve 7 is rotationally fixed on the ring sleeve inner core 5 of the sample testing platform A; (5) opening a test control power supply of the ventilation part, setting test wind pressure, and opening a fan device 15 of the gas generating device; after the pressure value on the display screen 20 is stable, manually pressing down the hand handle 4 to the horizontal position, carrying out air permeability test, and reading the air permeability of the sample; (6) lifting the hand handle 4 of the air permeable part to a vertical position, turning off the power supply of a fan device 15 of the gas generating device, putting down the rotating arm 17 of the wear-resistant part, enabling the grinding disc 19 to contact the surface of the sample 21, turning on a control power switch of the wear-resistant part, setting the friction times to be 15 times, and starting a friction experiment; (7) after the grinding disc 19 automatically stops moving, the friction part control power switch is closed, the rotating arm 17 is manually lifted, and then the step (5) is repeated; (8) and (4) circularly performing the ventilation and friction tests until the air permeability of the sample exceeds 130% of the initial test value, and stopping the test, wherein the friction times at the moment are the film fastness of the sample.
Specific example 3:
the filter material film-covering fastness testing device/method comprises the following steps: cutting a polyester film-coated needle filter bag sample to enable the diameter of the sample 21 to be 40 mm; the arc-shaped metal screen 6 was cut so that the diameter of the arc-shaped metal screen 6 was 40mm, the arc-shaped metal screen 6 was placed on the sample 21, and both were fitted in the hollow collar 7 (note that the film-coated surface of the sample 21 was the lower surface). After the sealing ring 8 is added, the hollow ring sleeve 7 is rotationally fixed on the ring sleeve inner core 5 of the test platform A.
And opening a test control power supply of the ventilation part, setting the test wind pressure to be 200Pa, and opening a fan of the gas generating device. And after the pressure value on the display screen is stable, manually pressing the hand pressing handle to a horizontal position, carrying out air permeability test, and reading the air permeability of the sample to be 27.83 mm/s.
Lifting a hand handle of the breathable part to a vertical position, closing a fan power supply of the gas generating device, putting down a rotating arm of the wear-resistant part, enabling the grinding disc to contact the surface of the sample, starting a control power switch of the wear-resistant part, setting the friction times to be 15 times, and starting a friction experiment; after the grinding disc automatically stops moving, the friction part is closed to control a power switch, and the rotating arm is manually lifted.
And opening a test control power supply of the ventilation part, setting the test wind pressure to be 200Pa, and opening a fan of the gas generating device. And after the pressure value on the display screen is stable, manually pressing down the hand pressing handle to a horizontal position, carrying out air permeability test, and reading the air permeability of the sample to be 28.64 mm/s.
After the air permeability and friction experiments are repeated until 6 th friction is finished, the air permeability of the sample is measured to be 36.42mm/s, and is increased by 30% relative to the air permeability of the initial sample, so that the film fastness of the polyester film-coated needling filter bag sample is 90 (friction times).
The materials of the needle filter bag are various, and the needle filter bag comprises polyester fiber at medium and normal temperature, polyphenylene sulfide fiber at high temperature, glass fiber or various fiber blended fabrics. Due to different fiber properties and different film covering processes, the manufactured filter bag and the PTFE microporous film have different compounding fastness. When the PTFE microporous membrane and the needled non-woven material have low composite fastness, the PTFE microporous membrane can be damaged and fall off from the surface of the needled non-woven material under the condition of less wear-resisting times, and the air permeability of a sample is obviously increased. When the composite fastness of the PTFE microporous membrane and the needle-punched non-woven material is very high, the PTFE microporous membrane can be peeled off and damaged from the surface of the needle-punched non-woven material through more times of friction. Therefore, the number of rubs when the air permeability of the sample increases to 130% of the initial value after the rubbing can be characterized as the film-fastness thereof. Compared with other film covering fastness testing methods, the testing device disclosed by the invention is simple in structure, simple and convenient to operate and innovative.
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 and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides a filter material tectorial membrane fastness testing arrangement, includes test platform (A) and sample (21), its characterized in that:
the device consists of four parts: the gas-permeable part, the sample fixing part and the gas generating part are combined and rubbed;
the air permeable part comprises a control console (1) mounted on a test platform (A);
the control console (1) is provided with a display screen (20) for displaying the air permeability of the sample in the air permeability testing process in real time;
one side of the control console (1) is provided with a transmission connection pressure lever (2);
the end side of the transmission linkage pressure lever (2) is provided with a test head (3);
a hand handle (4) for manually adjusting the position of the test head (3) is arranged on the edge side of the test head (3);
the sample fixing part comprises a ring sleeve inner core (5) fixedly arranged on the testing platform (A);
a hollow ring sleeve (7) with internal threads is rotatably arranged on the ring sleeve inner core (5);
an arc-shaped metal screen (6) matched with the sample (21) is clamped on the hollow ring sleeve (7);
the gas generating part comprises an air inlet cylinder (9) positioned on the test platform (A);
the upper side of the air inlet cylinder (9) is communicated with an inner groove of the ring sleeve inner core (5);
an upper air chamber (10) communicated with the air inlet cylinder (9) is arranged below the air inlet cylinder (9);
a lower air chamber (11) communicated with the upper air chamber (10) is arranged below the upper air chamber (10);
a hose (14) communicated with the lower air chamber (11) is connected below the lower air chamber (11);
the bottom end side of the hose (14) is connected with a fan device (15);
the friction part comprises a sliding groove (18) arranged on the upper side surface of the test platform (A);
a hinged support block (16) which moves back and forth on the sliding chute (18) is movably arranged on the sliding chute (18);
the hinged support block (16) is movably connected with a rotating arm (17);
one end of the rotating arm (17) is provided with a grinding disc (19).
2. The filter material membrane fastness testing device of claim 1, characterized in that:
the inner diameter of the test head (3) is matched with the outer diameter of the hollow ring sleeve (7).
3. The filter material membrane fastness testing device of claim 1, characterized in that:
a sealing ring (8) is arranged between the hollow ring sleeve (7) and the ring sleeve inner core (5);
and the outer ring side of the ring sleeve inner core (5) is provided with an external thread matched with the thread on the inner side of the hollow ring sleeve (7).
4. The filter material membrane fastness testing device of claim 1, characterized in that:
the upper air chamber (10) and the lower air chamber (11) are both provided with dust screens (12);
an airflow nozzle (13) is arranged between the upper air chamber (10) and the lower air chamber (11);
the fan device (15) adopts a vacuum-pumping fan.
5. The filter material membrane fastness testing device of claim 1, characterized in that:
a power driving device for driving the hinge supporting block (16) to move back and forth is arranged in the test platform (A);
the grinding disc (19) is provided with a notch structure matched with the state of the sample (21) supported by the arc-shaped metal screen (6).
6. The method for testing the filter material film-covering fastness is characterized by comprising the following steps:
firstly, cutting a film-coated sample to ensure that the diameter of the film-coated sample is slightly smaller than the inner diameter of the hollow ring sleeve;
secondly, cutting an arc-shaped metal screen with the same size as the sample of the film-coated sample;
thirdly, screwing down the hollow ring sleeve of the sample fixing part from the inner core of the ring sleeve;
fourthly, placing the metal screen on a film covering sample, and fixing the metal screen and the film covering sample in a hollow ring sleeve, wherein the film covering surface of the film covering sample is the lower surface; after the sealing ring is added, the hollow ring sleeve is rotationally fixed on the ring sleeve inner core of the sample testing platform again;
fifthly, opening a test control power supply on the ventilation part, setting test wind pressure and opening a fan device of the gas generating device; after the pressure value on the display screen is stabilized, manually pressing down the hand handle to a horizontal position, carrying out air permeability test, and reading the air permeability of the sample;
sixthly, lifting a hand handle in the air permeable part to a vertical position, closing a power supply of a fan device of the gas generating device, putting down a rotating arm of the wear-resistant part to enable the notch position of the grinding disc to be in contact with the surface of the sample, then starting a power control power switch of the wear-resistant part, setting corresponding friction times, and starting a friction experiment;
seventhly, after the grinding disc automatically stops moving, closing a power control power switch of the friction part, manually lifting the rotating arm, and then repeating the fifth step;
eighthly, circularly performing the ventilation operation and the friction test operation until the air permeability of the sample exceeds 130 percent of the initial test value, and stopping the experiment; the number of rubbing times at this time is the film fastness of the sample.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911313295.7A CN110954474A (en) | 2019-12-19 | 2019-12-19 | A filter material coating fastness testing device and testing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911313295.7A CN110954474A (en) | 2019-12-19 | 2019-12-19 | A filter material coating fastness testing device and testing method thereof |
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