A nonwoven linting test device and method

Abstract

The present application relates to the technical field of non-woven fabric performance detection, and discloses a non-woven fabric shedding testing device and method, which comprises a dry-state shedding tester, one end of the dry-state shedding tester is fixedly provided with a test box, and the top of the test box is fixedly provided with a top cover; a discharge hopper is fixedly provided in a circular hole in the middle of the bottom of the test box, and a shedding collection assembly is arranged on the discharge hopper; and a laser dust particle counter is fixedly arranged in the middle of the inside of the shedding collection assembly. The present application directly acts on the shedding closely adhered to the inner and outer surfaces of the non-woven fabric by means of the synchronous impact of the inner and outer airflow of the airflow impact assembly and the stirring mode of the stirring assembly, forcibly breaks the binding force between the fibers, and promotes the complete shedding of the shedding, thereby solving the problem of low detection data caused by incomplete shedding of the traditional equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of non-woven fabric performance detection, and particularly relates to a non-woven fabric shedding testing device and a testing method. BACKGROUND

[0002] The dry-state shedding tester can be used for measuring non-woven fabric medical protective materials, personal hygiene and nursing materials, and electronic component production sites and electronic component wiping sites with high cleanliness requirements. The dry-state shedding tester, also known as a twist tester, is a professional device for evaluating the shedding test of non-woven fabrics under dry-state conditions. The testing principle is that the sample is subjected to a combined action of twisting and compression in the test box. During the twisting process, air is discharged from the test box. The test result is evaluated by counting and classifying the particles in the air using a laser dust particle counter.

[0003] At present, the existing dry-state shedding tester generally moves the non-woven fabric horizontally inside the instrument, and the surface shedding is caused by twisting. However, it has obvious technical limitations, which affect the testing accuracy. On the one hand, the device uses a non-woven fabric horizontal motion driving method to promote surface shedding by twisting. However, the design of the test box is not reasonable, and air flow dead angles are easily formed. The shedding inside the non-woven fabric cannot be completely discharged, which makes the test result not accurate. More importantly, for some loose shedding with strong fiber bonding performance, the tight adhesion on the inner and outer surfaces of the non-woven fabric cannot be broken by simple twisting, which cannot completely fall off, resulting in that this part of the hidden shedding is not detected, and it is difficult to truly reflect the actual shedding level of the material. Therefore, a non-woven fabric shedding testing device and a testing method are proposed to improve the above problems. SUMMARY

[0004] To solve the problems existing in the prior art, the present application provides a non-woven fabric shedding testing device, comprising:

[0005] A dry-state shedding tester is fixedly installed at one end of the dry-state shedding tester, and a top cover is fixedly installed at the top of the test box;

[0006] A discharge hopper is fixedly installed in a circular hole in the middle of the bottom of the test box, and a shedding collection assembly is arranged on the discharge hopper. A laser dust particle counter is fixedly installed in the middle of the inside of the shedding collection assembly;

[0007] A threaded sleeve is fixedly installed at the top of the test box, and a threaded rod is screwed to the inner wall of the threaded sleeve. The bottom end of the threaded rod is fixedly installed with a lifting disc. The inner wall top of the discharge hopper is fixedly installed with support rods distributed at equal distances. The one end of the support rod and the outer wall of the lifting disc are both fixedly installed with clamping assemblies. The non-woven fabric cylinder is clamped between the two clamping assemblies.

[0008] The reciprocating lifting mechanism is fixedly installed on the test box and used to drive the upper clamping assembly to lift up and down.

[0009] The airflow impact assembly is arranged on the upper clamping assembly.

[0010] The inner walls of the two clamping assemblies are fixedly installed with the stirring assemblies.

[0011] The outer wall of the lifting disc is fixedly connected with the inner wall of the inner sleeve, and one end of the supporting rod is fixedly connected with the outer wall of the inner sleeve. The outer wall corner of the inner sleeve is provided with an annular groove, and the outer sleeve is fixedly provided with an expansion pipe inserted into the annular groove. The top of the expansion pipe and the top of the annular groove are fixedly installed with a first spring. The top of the outer sleeve and the inner sleeve corner edge are fixedly installed with a fourth corrugated sheath. The outer wall bottom of the inner sleeve is fixedly provided with equidistantly distributed rotating seats. The other side of the clamping seat is provided with a traction groove. The inner wall bottom of the outer sleeve and the other side of the clamping seat are designed in a slope shape. The other side of the clamping seat is provided with a traction groove. The inner wall bottom of the outer sleeve is fixedly provided with a traction block inserted into the traction groove. The cross section of the traction block and the traction groove is designed in a T shape.

[0012] The outer wall bottom of the inner sleeve is fixedly provided with equidistantly distributed first convex strips. The other side of the clamping seat is fixedly provided with equidistantly distributed second convex strips. The positions of the second convex strips are staggered with the positions of the first convex strips.

[0013] The reciprocating lifting mechanism comprises a supporting plate fixedly installed on the inner wall of one end of the test box. The top of the supporting plate is rotatably connected with a threaded column. The top of the test box is fixedly installed with a forward-reverse motor used to drive the threaded column to rotate. The threaded column is screwed with a lifting plate. One end of the lifting plate is provided with a guide hole. The top of the supporting plate and the inner wall of the top of the test box are fixedly provided with a guide column penetrating through the guide hole. The other end of the lifting plate is provided with a connecting hole. The outer wall of the threaded rod is rotatably connected with the inner wall of the connecting hole through a bearing.

[0014] The first corrugated sheath and the second corrugated sheath are sleeved outside the threaded column. The third corrugated sheath is sleeved outside the threaded rod.

[0015] The application is further provided with the airflow impact assembly, which comprises an inner ring frame fixedly installed at the top of the inner sleeve, and the outer wall of the inner ring frame is rotationally connected with an outer ring frame through a sealing bearing, the inner wall of the outer ring frame and the outer wall of the inner ring frame are both provided with a plurality of communication holes for communication between the two, the inner wall of the inner ring frame is fixedly provided with a first connecting pipe penetrating through the lifting disc at equal distances, and the bottom end of the first connecting pipe is fixedly provided with an inner ring spray frame, the bottom of the inner ring spray frame is fixedly provided with inner nozzles distributed at equal distances, the inner nozzles are outwardly directed, the outer wall of the outer ring frame is fixedly provided with second connecting pipes distributed at equal distances, and the bottom end of the second connecting pipes is fixedly provided with an outer ring spray frame sleeved on the outer wall of the outer sleeve, the bottom of the outer ring spray frame is fixedly provided with outer nozzles distributed at equal distances, the outer nozzles are inwardly directed, the top side of the test box is fixedly provided with a gas storage cylinder, the top of the gas storage cylinder is fixedly provided with a pressure stabilizing pipe extending out of the top cover, the bottom side of the gas storage cylinder is fixedly provided with an air inlet pipe, and one end of the air inlet pipe is fixedly provided with a first one-way valve for air inlet only, one side of the outer ring frame is fixedly provided with a gas guide pipe, and one end of the gas guide pipe is fixedly provided with a second one-way valve, the second one-way valve is only for gas to enter the gas guide pipe, one end of the second one-way valve and the bottom of the gas storage cylinder are fixedly provided with a bellows, the bottom side of the gas storage cylinder and the top side of the test box are provided with a first movable hole, the inner wall of the first movable hole is fixedly provided with a sealing sleeve, the inner wall of the sealing sleeve is inserted with an L-shaped pull rod, one end of the L-shaped pull rod is fixedly connected with one end of the lifting plate, the bottom of the L-shaped pull rod and the top of the gas guide pipe are fixedly provided with a connecting column, the top end of the L-shaped pull rod is fixedly provided with a piston disc inserted in the gas storage cylinder, and the outer wall of the piston disc is fixedly provided with a piston sleeve abutting against the inner wall of the gas storage cylinder.

[0016] The application is further provided with the stirring assembly, which comprises L-shaped reinforcing rods fixedly installed at equal distances on the inner wall of the inner sleeve and the lifting disc, and the bottom end of the L-shaped reinforcing rods is fixedly provided with a same fixing cylinder, the middle of the bottom of the fixing cylinder is provided with a second movable hole, the inner wall of the second movable hole is inserted with a movable rod, the bottom end of the movable rod is fixedly provided with a buffer pad, the top end of the movable rod is provided with a insertion hole, the top inner wall of the fixing cylinder is fixedly provided with a fixing rod inserted in the insertion hole, the bottom of the fixing rod and the bottom of the insertion hole are fixedly provided with a third spring, the circumference of the fixing cylinder is provided with third movable holes distributed at equal distances, the inner wall of the third movable holes is fixedly provided with guide sleeves, the inner wall of the guide sleeves is inserted with stirring rods, one end of the stirring rods is fixedly provided with air bag pads, the other end of the stirring rods is rotationally connected with pulleys through pin shafts, the outer wall of the movable rod is fixedly provided with a conical seat for extruding the pulleys to move horizontally, the outer wall of the stirring rod is fixedly provided with a fixing ring, and the fixing ring is fixedly provided with a second spring on one side and the guide sleeve on the other side.

[0017] The application is further provided with the unloading frame fixedly installed on the inner wall of the discharge hopper, the inner wall of the unloading frame is designed as a funnel shape, the laser dust particle counter is fixedly installed at the middle of the inner wall of the unloading frame, the laser dust particle counter is electrically connected with the dry-state lint test instrument, the inner bottom of the unloading frame is fixedly installed with an unloading inclined seat, one side of the unloading frame close to the bottom end of the unloading inclined seat is fixedly installed with an unloading pipe extending out of the discharge hopper, the unloading pipe is in an inclined shape, the bottom end of the unloading pipe is fixedly installed with an unloading valve, the bottom end of the discharge hopper and one side of the top of the unloading frame are fixedly installed with a material guide pipe, the material guide pipe is communicated with the unloading frame, the top end of the material guide pipe is tangent to the outer wall of the unloading frame, the inner top of the unloading frame is fixedly installed with an annular blocking seat, and the unloading frame and the discharge hopper are provided with an air exhaust hole, a dustproof air-permeable net is fixedly installed in the air exhaust hole.

[0018] The application is further provided with the unloading frame fixedly installed on the inner wall of the discharge hopper, the inner wall of the unloading frame is designed as a funnel shape, the laser dust particle counter is fixedly installed at the middle of the inner wall of the unloading frame, the laser dust particle counter is electrically connected with the dry-state lint test instrument, the inner bottom of the unloading frame is fixedly installed with an unloading inclined seat, one side of the unloading frame close to the bottom end of the unloading inclined seat is fixedly installed with an unloading pipe extending out of the discharge hopper, the unloading pipe is in an inclined shape, the bottom end of the unloading pipe is fixedly installed with an unloading valve, the bottom end of the discharge hopper and one side of the top of the unloading frame are fixedly installed with a material guide pipe, the material guide pipe is communicated with the unloading frame, the top end of the material guide pipe is tangent to the outer wall of the unloading frame, the inner top of the unloading frame is fixedly installed with an annular blocking seat, and the unloading frame and the discharge hopper are provided with an air exhaust hole, a dustproof air-permeable net is fixedly installed in the air exhaust hole.

[0019] A non-woven fabric lint test method applied to a non-woven fabric lint test device, comprising the following steps:

[0020] Step one, device pretreatment: open the visual door on one side of the test box, check whether the clamping assembly, air flow impact assembly, material stirring assembly and lint collection assembly in the test box are in normal state, ensure that the laser dust particle counter and the dry-state lint test instrument are electrically connected normally, and clean the residual lint in the test box, discharge hopper and unloading frame at the same time;

[0021] Step two, non-woven fabric cylinder installation: pull the stirring frame on the outer wall of the outer sleeve, the outer sleeve drives the telescopic pipe to move upwards along the annular groove and compresses the first spring, at the same time, the traction block at the bottom of the inner wall of the outer sleeve drives the clamping seat to rotate outward around the rotating seat through the cooperation of the traction groove, so that all the clamping seats are unfolded, at this time, the non-woven fabric cylinder to be tested is sleeved outside the inner sleeve, then the stirring frame is loosened, the first spring is reset to drive the outer sleeve to move downwards, the traction block pushes the clamping seat to rotate inward, so that one side of the clamping seat clamps the non-woven fabric cylinder in cooperation with the outer wall of the inner sleeve, the above clamping operation is repeated, and the two clamping assemblies clamp the top and bottom of the non-woven fabric cylinder respectively;

[0022] Step three, test parameter setting: start the dry-state lint test instrument, set the test time to 10-20 minutes, the lifting frequency of the reciprocating lifting mechanism to 1-3 times / minute, and turn on the laser dust particle counter, set the particle size range of particle counting to 0.3 μm, 0.5 μm and 5 μm, so as to enter the data detection state;

[0023] Step four, the test operation of shedding: start the forward and reverse motor in the reciprocating lifting mechanism, the forward and reverse motor drives the threaded column to reverse, the threaded column drives the lifting plate to move up and down along the guide column, the lifting plate drives the threaded rod and the upper clamping assembly to lift, and the screw connection of the threaded sleeve makes the upper clamping assembly rotate synchronously, so as to drive the non-woven fabric cylinder to twist, at the same time, the L-shaped pull rod drives the piston disc to move up and down in the air cylinder, when the piston disc moves down, the gas in the air cylinder enters the outer ring frame through the corrugated pipe, the second one-way valve and the air guide pipe, part of the gas enters the inner ring frame through the communication hole, the gas entering the outer ring frame is transported to the outer ring spray frame through the second connecting pipe, and the gas is sprayed from the outer nozzle to the outer wall of the non-woven fabric cylinder, the gas entering the inner ring frame is transported to the inner ring spray frame through the first connecting pipe, and the gas is sprayed from the inner nozzle to the inner wall of the non-woven fabric cylinder, the synchronous impact of the inner and outer walls causes the non-woven fabric cylinder surface to shed and fall off, and when the upper clamping assembly lifts, the stirring assembly moves synchronously, the two stirring assemblies impact each other, the movable rod moves up and down along the fixed cylinder, drives the conical seat to extrude the pulley, and makes the stirring rod move transversely along the guide sleeve, the air bag pad contacts and stirs the inner wall of the non-woven fabric cylinder, and helps the loose shed to separate, the second spring and the third spring drive the stirring rod to reset when the movable rod resets, and the reciprocating stirring is realized;

[0024] Step five, shed collection and detection: during the test, the shed falls off under the action of gravity and airflow, and converges to the discharge hopper along the spherical discharge seat at the bottom of the test box, at this time, the particle number and particle size distribution of the shed in the discharge frame are detected in real time by the laser dust particle counter, and the data are transmitted to the dry shed tester for real-time recording and storage, at the same time, the airflow carrying the shed is tangentially transported to the discharge frame through the guide pipe, and forms a cyclone under the action of the annular baffle, the airflow is discharged through the exhaust hole, and the shed is left in the discharge frame under the action of centrifugal force;

[0025] Step six, test end and cleaning: after the preset test time is reached, the dry shed tester automatically stops running, the forward and reverse motor and the laser dust particle counter are turned off, the visual door is opened, the clamping assembly is loosened according to the operation of step two, the tested non-woven fabric cylinder is taken out, the discharge valve on the discharge pipe is opened, the shed collected in the discharge frame is discharged and collected along the discharge inclined seat through the discharge pipe, and the residual shed in the test box, the discharge hopper and the discharge frame is cleaned, the visual door is closed, and a single test is completed;

[0026] Step seven, data processing and analysis: the test data are exported by the dry shed tester, the total number of shed of different particle sizes and the shed amount per unit time are counted, the shed performance of the non-woven fabric cylinder is judged according to the preset standard, and a test report is generated.

[0027] In summary, compared with the prior art, the above structure has the following advantages:

[0028] 1. In this invention, the clamping assembly, through the sleeve connection between the inner sleeve and the outer sleeve, combined with the restoring force of the first spring, can drive the clamping seat to open and close automatically. When the actuating frame is pulled, the outer sleeve moves upward, causing the clamping seat to unfold outward, facilitating the quick installation of the nonwoven fabric tube. After being released, the outer sleeve moves downward, and through the cooperation of the traction block and the inclined surface of the traction groove, pushes the clamping seat to clamp inward. At the same time, the first convex strip and the second convex strip are staggered to increase the friction with the nonwoven fabric tube, preventing sample displacement during testing. This design can adapt to the installation of nonwoven fabric tubes of different diameters, eliminating the need for frequent clamp replacements and improving the versatility of the equipment.

[0029] 2. In this invention, the reciprocating lifting mechanism drives the threaded column to rotate via a forward and reverse motor, which in turn moves the lifting plate up and down along the guide column. In conjunction with the screw connection between the threaded sleeve and the threaded rod, the lifting and rotation of the upper clamping component are realized simultaneously. This motion mode allows the nonwoven fabric tube to bear both torsional force and axial tensile force during testing, which is closer to the stress state of nonwoven fabric in actual use. It solves the problem of traditional equipment only having single torsion and the test scenario being out of touch with reality, laying the foundation for accurate testing.

[0030] 3. In this invention, the airflow impact component adopts an "internal and external dual-spray" design: when the lifting plate moves, the L-shaped pull rod drives the piston disc to reciprocate in the air storage cylinder, and delivers high-pressure gas through the outer ring frame and the inner ring frame to the outer ring spray frame and the inner ring spray frame respectively. The outer nozzle sprays airflow onto the outer wall of the nonwoven fabric tube, and the inner nozzle sprays airflow onto the inner wall. This synchronous internal and external impact method can directly act on the hidden lint that is tightly attached to the inner and outer surfaces of the nonwoven fabric, forcibly breaking the bonding force between the fibers, and causing the lint to fall off completely. This solves the problem of low test data caused by incomplete lint removal in traditional equipment.

[0031] 4. In this invention, the material-pushing component moves synchronously with the upper clamping component. When the two material-pushing components impact each other, the movable rod is squeezed and moves up and down along the fixed cylinder, driving the conical seat to squeeze the pulley, causing the actuating rod to move laterally. The airbag pad contacts the inner wall of the non-woven fabric cylinder and forms a pushing phenomenon, thereby fully peeling off the loose but not fallen lint. At the same time, the flexible material of the airbag pad avoids scratching the surface of the non-woven fabric. Under the synergistic effect of material-pushing and high-pressure impact, the efficiency of lint removal is greatly improved, and comprehensive testing can be achieved without extending the testing time.

[0032] 5. In this invention, the inner wall of the unloading frame of the fluff collection component is designed as a funnel shape. Combined with the spherical discharge seat at the bottom of the test chamber, it can guide the fallen fluff to quickly converge into the discharge hopper under the action of gravity. At the same time, the guide pipe is tangential to the outer wall of the unloading frame. The airflow carrying the fluff enters the unloading frame tangentially and forms a vortex. Under the action of centrifugal force, the fluff is thrown towards the inner wall of the unloading frame and slides along the unloading inclined seat to the unloading pipe. The airflow is discharged through the dustproof and breathable mesh of the exhaust hole, thereby improving the fluff collection efficiency through the vortex.

[0033] 6、In the present application, the laser dust particle counter is fixed in the middle of the inner wall of the discharge frame, which can detect the number and particle size distribution of the falling fiber particles passing through the discharge frame in real time, and transmit the data to the dry falling fiber tester for recording and storage, avoiding the lag of manual sampling detection after the test of traditional equipment, and realizing the integration of "test-detection-data recording". BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a three-dimensional structure schematic diagram of the non-woven fabric falling fiber test device of the present application;

[0035] Figure 2 It is a schematic diagram of the internal structure of the test box of the non-woven fabric falling fiber test device of the present application;

[0036] Figure 3 It is a schematic diagram of the reciprocating lifting mechanism and air flow impact assembly structure of the non-woven fabric falling fiber test device of the present application;

[0037] Figure 4 It is a schematic diagram of the threaded column and inner ring spray frame structure of the non-woven fabric falling fiber test device of the present application;

[0038] Figure 5 It is a schematic diagram of the clamping assembly and material shifting assembly structure of the non-woven fabric falling fiber test device of the present application;

[0039] Figure 6 It is a sectional view of the clamping assembly of the non-woven fabric falling fiber test device of the present application;

[0040] Figure 7 It is a schematic diagram of the clamping seat and traction groove structure of the non-woven fabric falling fiber test device of the present application;

[0041] Figure 8 It is a schematic diagram of the traction block and second convex strip structure of the non-woven fabric falling fiber test device of the present application;

[0042] Figure 9 It is a schematic diagram of the sealing sleeve and piston disc structure of the non-woven fabric falling fiber test device of the present application;

[0043] Figure 10 It is a schematic diagram of the material shifting assembly and lifting disc structure of the non-woven fabric falling fiber test device of the present application;

[0044] Figure 11 It is a sectional view of the material shifting assembly of the non-woven fabric falling fiber test device of the present application;

[0045] Figure 12 It is a schematic diagram of the material guide pipe and dustproof air-permeable net structure of the non-woven fabric falling fiber test device of the present application;

[0046] Figure 13Figure 1 is a sectional view of the discharge hopper of a nonwoven fabric shedding test device according to the present disclosure.

[0047] Explanation of reference numerals in the figures:

[0048] 1, dry shedding tester; 2, support frame; 3, discharge hopper; 4, test box; 5, viewing door; 6, top cover; 7, reciprocating lifting mechanism; 71, support plate; 72, guide column; 73, lifting plate; 74, forward-reverse motor; 75, threaded column; 76, guide hole; 8, threaded sleeve; 9, threaded rod; 10, airflow impact assembly; 101, air cylinder; 102, pressure stabilizing tube; 103, first one-way valve; 104, corrugated tube; 105, L-shaped pull rod; 106, inner ring frame; 107, connecting column; 108, air guide tube; 109, outer ring frame; 1010, outer ring spray frame; 1011, second connecting tube; 1012, first connecting tube; 1013, second one-way valve; 1014, outer spray head; 1015, inner ring spray frame; 1016, inner spray head; 1017, communication hole; 1018, sealing sleeve; 1019, piston disc; 11, clamping assembly; 111, outer sleeve; 112, toggle frame; 113, fourth corrugated sheath; 114, inner sleeve; 115, clamping seat; 116, telescopic tube; 117, annular groove; 118, first spring; 119, traction groove; 1110, first ridge; 1111, traction block; 1112, second ridge; 12, nonwoven fabric cylinder; 13, support rod; 14, shedding collection assembly; 141, material guide tube; 142, dustproof and breathable mesh; 143, discharge tube; 144, discharge frame; 145, annular stop seat; 146, discharge inclined seat; 15, discharge seat; 16, first corrugated sheath; 17, second corrugated sheath; 18, third corrugated sheath; 19, material shifting assembly; 191, fixed cylinder; 192, movable rod; 193, buffer pad; 194, L-shaped reinforcing rod; 195, conical seat; 196, guide sleeve; 197, toggle lever; 198, air bag pad; 199, fixed rod; 1910, pulley; 1911, second spring; 1912, jack; 1913, third spring; 20, lifting disc; 21, laser dust particle counter. DETAILED DESCRIPTION

[0049] Embodiments of the present disclosure are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters designate the same or like components throughout the drawings. The embodiments described below are presented by way of example only, and are not intended to limit the present disclosure, unless otherwise defined by the claims.

[0050] In the description of the present statement, it is understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present statement and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present statement.

[0051] In the description of the present statement, it should be noted that unless otherwise explicitly specified and limited, the terms "fixedly installed", "connected", "connected", "provided" should be understood broadly, for example, it can be fixedly connected, provided, or detachably connected, provided, or integrally connected, provided. For those skilled in the art, the specific meaning of the above terms in the present statement can be understood according to the specific circumstances.

[0052] Please refer to Figures 1-13 The present application provides a kind of non-woven fabric shed test device, comprising:

[0053] Dry-state shed tester 1, one end of dry-state shed tester 1 is fixedly installed with test box 4, and the top of test box 4 is fixedly installed with top cover 6;

[0054] Discharge hopper 3, the bottom of test box 4 is provided with a circular hole for the fixed installation of discharge hopper 3, and discharge hopper 3 is provided with shed collection assembly 14, and the inside of shed collection assembly 14 is fixedly installed with laser dust particle counter 21 in the middle;

[0055] The threaded sleeve 8 is fixed in the middle of the top of the test box 4, the inner wall of the threaded sleeve 8 is screwed with a threaded rod 9, the bottom end of the threaded rod 9 is fixed with a lifting disc 20, the inner wall top of the discharge hopper 3 is fixed with equidistantly distributed support rods 13, one end of the support rod 13 and the outer wall of the lifting disc 20 are both fixedly installed with clamping assemblies 11, the non-woven fabric cylinder 12 is clamped between the two clamping assemblies 11, the two clamping assemblies 11 both include an inner sleeve 114 and an outer sleeve 111 sleeved outside the inner sleeve 114, and the cross sections of the inner sleeve 114 and the outer sleeve 111 are both designed in an L shape, the outer wall of the lifting disc 20 is fixedly connected with the inner wall of the inner sleeve 114, and one end of the support rod 13 is fixedly connected with the outer wall of the inner sleeve 114, the outer wall corner of the inner sleeve 114 is provided with an annular groove 117, the outer sleeve 111 is fixed with a telescopic pipe 116 inserted into the annular groove 117, the top of the telescopic pipe 116 and the top of the annular groove 117 are fixedly installed with a first spring 118, the top of the outer sleeve 111 and the edge of the top corner of the inner sleeve 114 are fixedly installed with a fourth corrugated sheath 113, the outer wall top of the outer sleeve 111 is fixed with a toggle frame 112, the outer wall bottom of the inner sleeve 114 is fixed with equidistantly distributed rotating seats, and the rotating seat is all rotatably connected with a clamping seat 115 through a pin shaft, the non-woven fabric cylinder 12 is clamped at the gap between the clamping seat 115 on one side and the outer wall of the inner sleeve 114, the inner wall bottom of the outer sleeve 111 and the other side of the clamping seat 115 are both designed in a slope shape, the other side of the clamping seat 115 is provided with a traction groove 119, the inner wall bottom of the outer sleeve 111 is fixed with a traction block 1111 inserted into the traction groove 119, the cross sections of the traction block 1111 and the traction groove 119 are both designed in a T shape, the outer wall bottom of the inner sleeve 114 is fixed with equidistantly distributed first protrusions 1110, and the one side of the clamping seat 115 is fixed with equidistantly distributed second protrusions 1112, the positions of the second protrusions 1112 and the first protrusions 1110 are staggered, the toggle frame 112 is pulled, so that the outer sleeve 111 drives the telescopic pipe 116 to move upwards along the annular groove 117 and compresses the first spring 118, at the same time, the traction block 1111 on the inner wall bottom of the outer sleeve 111 cooperates with the traction groove 119 to drive the clamping seat 115 to rotate outwards around the rotating seat, so that all the clamping seats 115 are unfolded, at this time, the non-woven fabric cylinder 12 to be tested is sleeved outside the inner sleeve 114, then the toggle frame 112 is loosened, the first spring 118 resets to drive the outer sleeve 111 to move downwards, the clamping seat 115 is pushed inwards by the traction block 1111, so that the one side of the clamping seat 115 cooperates with the outer wall of the inner sleeve 114 to clamp the non-woven fabric cylinder 12, at the same time, the first protrusions 1110 and the second protrusions 1112 are staggeredly distributed, so as to increase the friction force with the non-woven fabric cylinder 12, which is convenient for installing and dismounting the non-woven fabric cylinder 12;

[0056] The reciprocating lifting mechanism 7 is fixedly installed on the test box 4 and used for driving the upper clamping assembly 11 to lift, the reciprocating lifting mechanism 7 comprises a support plate 71 fixedly installed on the inner wall of one end of the test box 4, a threaded column 75 rotatably connected to the support plate 71, a forward and reverse motor 74 fixedly installed on the top of the test box 4 and used for driving the threaded column 75 to rotate, a lifting plate 73 screwed on the threaded column 75, a guide hole 76 formed in one end of the lifting plate 73, a guide column 72 fixedly installed on the top of the support plate 71 and the inner wall of the top of the test box 4 and penetrating through the guide hole 76, a connecting hole formed in the other end of the lifting plate 73, and the outer wall of the threaded rod 9 and the inner wall of the connecting hole are rotatably connected through a bearing, the forward and reverse motor 74 in the reciprocating lifting mechanism 7 drives the threaded column 75 to forward and reverse rotate, drives the lifting plate 73 to reciprocate up and down along the guide column 72, drives the threaded rod 9 and the upper clamping assembly 11 to lift, cooperates with the screwing action of the threaded sleeve 8, conveniently drives the upper clamping assembly 11 to synchronously lift and rotate, and thus conveniently drives the non-woven fabric cylinder 12 to twist.

[0057] The airflow impact assembly 10 is arranged on the upper clamping assembly 11.

[0058] The two clamping assemblies 11 are fixedly installed with the stirring assemblies 19 on the inner walls.

[0059] In the application, the first corrugated sheath 16, the second corrugated sheath 17 and the third corrugated sheath 18 are respectively fixedly installed between the bottom end of the lifting plate 73 and the top of the support plate 71, between the top end of the lifting plate 73 and the inner wall of the top of the test box 4, and between the other end of the top of the lifting plate 73 and the inner wall of the top of the test box 4, and the first corrugated sheath 16 and the second corrugated sheath 17 are sleeved outside the threaded column 75, and the third corrugated sheath 18 is sleeved outside the threaded rod 9.

[0060] In the application, the airflow impact assembly 10 comprises an inner ring frame 106 fixedly installed at the top of the inner sleeve 114, and the circumferential outer wall of the inner ring frame 106 is rotationally connected with an outer ring frame 109 through a sealing bearing, the inner wall of the outer ring frame 109 and the outer wall of the inner ring frame 106 are both provided with a plurality of communication holes 1017 for communication between the two, the inner wall of the inner ring frame 106 is fixedly provided with first connecting pipes 1012 which pass through the lifting disc 20 at equal distances, and the bottom end of the first connecting pipes 1012 is fixedly provided with a same inner ring spray frame 1015, the bottom of the inner ring spray frame 1015 is fixedly provided with inner spray heads 1016 which are distributed at equal distances and face outward, the outer wall of the outer ring frame 109 is fixedly provided with second connecting pipes 1011 which are distributed at equal distances, and the bottom end of the second connecting pipes 1011 is fixedly provided with a same outer ring spray frame 1010 which is sleeved on the outer wall of the outer sleeve 111, the bottom of the outer ring spray frame 1010 is fixedly provided with outer spray heads 1014 which are distributed at equal distances and face inward, the top side of the test box 4 is fixedly installed with a gas storage cylinder 101, and the top of the gas storage cylinder 101 is fixedly provided with a pressure stabilizing pipe 102 which extends out of the top cover 6, the bottom side of the gas storage cylinder 101 is fixedly provided with an air inlet pipe, one end of the air inlet pipe is fixedly installed with a first one-way valve 103 which is only used for air inlet, one side of the outer ring frame 109 is fixedly provided with a gas guide pipe 108, and one end of the gas guide pipe 108 is fixedly installed with a second one-way valve 1013 which is only used for gas inlet into the gas guide pipe 108, one end of the second one-way valve 1013 and the bottom of the gas storage cylinder 101 are fixedly installed with a corrugated pipe 104, the bottom side of the gas storage cylinder 101 and the top side of the test box 4 are provided with a first movable hole, and the inner wall of the first movable hole is fixedly provided with a sealing sleeve 1018, the inner wall of the sealing sleeve 1018 is inserted with an L-shaped pull rod 105, one end of the L-shaped pull rod 105 is fixedly connected with one end of the lifting plate 73, and the bottom of the L-shaped pull rod 105 and the top of the gas guide pipe 108 are fixedly provided with a connecting column 107, the top end of the L-shaped pull rod 105 is fixedly installed with a piston disc 1019 which is inserted in the gas storage cylinder 101, the outer wall of the piston disc 1019 is fixedly installed with a piston sleeve which is attached to the inner wall of the gas storage cylinder 101, the L-shaped pull rod 105 and the piston disc 1019 are driven by the reciprocating lifting mechanism 7 to move up and down in the gas storage cylinder 101, when the piston disc 1019 moves downward, the gas in the gas storage cylinder 101 enters the outer ring frame 109 through the corrugated pipe 104, the second one-way valve 1013 and the gas guide pipe 108, part of the gas enters the inner ring frame 106 through the communication holes 1017, the gas entering the outer ring frame 109 is transported to the outer ring spray frame 1010 through the second connecting pipes 1011, and the gas is sprayed by the outer spray heads 1014 to the outer wall of the non-woven fabric cylinder 12, the gas entering the inner ring frame 106 is transported to the inner ring spray frame 1015 through the first connecting pipes 1012, and the gas is sprayed by the inner spray heads 1016 to the inner wall of the non-woven fabric cylinder 12, so that the combination between fibers is forced to break under the synchronous impact of the inner and outer airflow, and the complete shedding of the shed is promoted, thereby solving the problem of low detection data caused by incomplete shedding of the traditional equipment.

[0061] The present application, the stirring assembly 19 comprises L-shaped reinforcing rod 194 fixed equidistantly on the inner sleeve 114 inner wall and the lifting disc 20, and the bottom end of the L-shaped reinforcing rod 194 is fixedly installed with the same fixed cylinder 191, the middle of the bottom of the fixed cylinder 191 is provided with a second movable hole, the inner wall of the second movable hole is inserted with a movable rod 192, the bottom end of the movable rod 192 is fixedly installed with a buffer pad 193, and the top end of the movable rod 192 is provided with a insertion hole 1912, the top inner wall of the fixed cylinder 191 is fixedly installed with a fixed rod 199 inserted in the insertion hole 1912, the bottom of the fixed rod 199 and the bottom of the insertion hole 1912 are fixedly installed with a third spring 1913, the circumference of the fixed cylinder 191 is provided with equidistantly distributed third movable holes, and the inner walls of the third movable holes are all fixedly installed with guide sleeves 196, the inner walls of the guide sleeves 196 are all inserted with stirring rods 197, one end of the stirring rod 197 is fixedly installed with an air bag pad 198, the other end of the stirring rod 197 is rotatably connected with a pulley 1910 through a pin shaft, and the outer wall of the movable rod 192 is fixedly installed with a conical seat 195 for extruding the pulley 1910 to move horizontally, the outer wall of the stirring rod 197 is fixedly installed with a fixed ring, and one side of the fixed ring and one side of the guide sleeve 196 are fixedly installed with a second spring 1911, when two stirring assemblies 19 impact each other, the movable rod 192 is extruded to move up and down along the fixed cylinder 191, drives the conical seat 195 to extrude the pulley 1910, so that the stirring rod 197 moves horizontally, the air bag pad 198 contacts with the inner wall of the non-woven fabric cylinder 12 and forms a stirring phenomenon, so as to fully strip the loose but not fallen fluff, greatly improves the fluff falling efficiency.

[0062] In the present application, the shedding collection assembly 14 comprises a discharging frame 144 fixedly installed on the inner wall of the discharge hopper 3, and the inner wall of the discharging frame 144 is designed in a funnel shape, the laser dust particle counter 21 is fixedly installed at the middle of the inner wall of the discharging frame 144, the laser dust particle counter 21 is electrically connected with the dry shedding tester 1, the inner bottom of the discharging frame 144 is fixedly installed with a discharging inclined seat 146, and the side of the discharging frame 144 close to the bottom end of the discharging inclined seat 146 is fixedly installed with a discharging pipe 143 extending out of the discharge hopper 3, the discharging pipe 143 is inclined, the bottom end of the discharging pipe 143 is fixedly installed with a discharging valve, the bottom end of the discharge hopper 3 and the top of one side of the discharging frame 144 are fixedly installed with a guide pipe 141, and the guide pipe 141 is communicated with the discharging frame 144, the top end of the guide pipe 141 is tangent to the outer wall of the discharging frame 144, the inner top of the discharging frame 144 is fixedly installed with an annular blocking seat 145, and the discharging frame 144 and the discharge hopper 3 are provided with an exhaust hole, and a dustproof air-permeable net 142 is fixedly installed in the exhaust hole, after the airflow carrying the shedding enters the discharging frame 144 along the tangent direction, a cyclone is formed, under the action of the centrifugal force, the shedding is thrown to the inner wall of the discharging frame 144 and slides along the discharging inclined seat 146 to the discharging pipe 143, and the airflow is discharged through the dustproof air-permeable net 142 of the exhaust hole, so as to improve the shedding collection efficiency through the cyclone.

[0063] In the present application, the bottom inner wall of the test box 4 is fixedly installed with a discharging seat 15, the top of the discharging seat 15 is designed in a spherical shape, a through hole communicated with the discharge hopper 3 is formed in the middle of the discharging seat 15, an observation port is formed in one side of the test box 4, and a visual door 5 is arranged on the observation port, the bottom of the test box 4 and the bottom of the dry shedding tester 1 are fixedly installed with a support frame 2, and the bottom of the support frame 2 is fixedly installed with a plurality of moving wheels, the discharging seat 15 is arranged to facilitate the shedding to gather in the discharge hopper 3, the visual door 5 is arranged to facilitate the operator to observe the test process in real time, to discover the abnormality in time, and to facilitate the opening of the test box 4 and the timely cleaning, and the moving wheels are arranged to facilitate the flexible adjustment of the position of the equipment and the adaptation to different laboratory placement scenes.

[0064] A non-woven fabric shedding test method applied to a non-woven fabric shedding test device, comprising the following steps:

[0065] Step one, device pretreatment: open the visual door 5 on one side of the test box 4, check whether the clamping assembly 11, airflow impact assembly 10, material stirring assembly 19 and shedding collection assembly 14 inside the test box 4 are in normal state, ensure that the laser dust particle counter 21 and the dry shedding tester 1 are electrically connected normally, and clean the residual shedding in the test box 4, discharge hopper 3 and discharging frame 144;

[0066] Step two, non-woven fabric cylinder installation: pull the outer wall of the outer sleeve 111 to pull the frame 112, the outer sleeve 111 drives the telescopic tube 116 to move upward along the annular groove 117 and compresses the first spring 118, at the same time, the traction block 1111 at the bottom of the inner wall of the outer sleeve 111 cooperates with the traction groove 119 to drive the clamping seat 115 to rotate outward around the rotating seat, so that all the clamping seats 115 are unfolded, at this time, the non-woven fabric cylinder 12 to be tested is sleeved outside the inner sleeve 114, then the pull frame 112 is loosened, the first spring 118 resets to drive the outer sleeve 111 to move downward, the traction block 1111 pushes the clamping seat 115 to rotate inward, so that one side of the clamping seat 115 cooperates with the outer wall of the inner sleeve 114 to clamp the non-woven fabric cylinder 12, and the above clamping operation is repeated, so that the two clamping assemblies 11 clamp the top and bottom of the non-woven fabric cylinder 12 respectively;

[0067] Step three, test parameter setting: start the dry state flocculation tester 1, set the test time to 10-20 minutes, the lifting frequency of the reciprocating lifting mechanism 7 to 1-3 times / minute, and turn on the laser dust particle counter 21, set the particle counting particle size range to 0.3 μm, 0.5 μm and 5 μm, so that it enters the data detection state;

[0068] Step four, flocculation test operation: start the forward and reverse motor 74 in the reciprocating lifting mechanism 7, the forward and reverse motor 74 drives the threaded column 75 to rotate forward and reverse, the threaded column 75 drives the lifting plate 73 to move up and down along the guide column 72, the lifting plate 73 drives the threaded rod 9 and the upper clamping assembly 11 to lift, cooperates with the screwing action of the threaded sleeve 8, so that the upper clamping assembly 11 rotates synchronously, thereby driving the non-woven fabric cylinder 12 to twist, at the same time, the L-shaped pull rod 105 drives the piston disc 1019 to move up and down in the air cylinder 101, when the piston disc 1019 moves downward, the gas in the air cylinder 101 enters the outer ring frame 109 through the corrugated pipe 104, the second one-way valve 1013 and the air guide pipe 108, part of the gas enters the inner ring frame 106 through the communication hole 1017, the gas entering the outer ring frame 109 is transported to the outer ring spray frame 1010 through the second connecting pipe 1011, and the gas is sprayed to the outer wall of the non-woven fabric cylinder 12 by the outer spray head 1014, the gas entering the inner ring frame 106 is transported to the inner ring spray frame 1015 through the first connecting pipe 1012, and the gas is sprayed to the inner wall of the non-woven fabric cylinder 12 by the inner spray head 1016, the synchronous impact of the inner and outer walls promotes the surface of the non-woven fabric cylinder 12 to fall and drop, and when the upper clamping assembly 11 lifts, the material stirring assembly 19 moves synchronously, the two material stirring assemblies 19 impact each other, the movable rod 192 moves up and down along the fixed cylinder 191, the conical seat 195 extrudes the pulley 1910, the stirring rod 197 moves transversely along the guide sleeve 196, the air bag pad 198 contacts and stirs the inner wall of the non-woven fabric cylinder 12, and the loose falling flocculation is assisted to separate, the second spring 1911 and the third spring 1913 reset the movable rod 192 to reset the stirring rod 197, and the reciprocating stirring is realized;

[0069] Step five, lint collection and detection: during the test, the detached lint is gathered along the spherical discharge seat 15 at the bottom of the test box 4 to the discharge hopper 3 under the action of gravity and airflow. At this time, the laser dust particle counter 21 detects the particle number and particle size distribution of the lint in the discharge frame 144 in real time, transmits the data to the dry lint tester 1 for real-time recording and storage. At the same time, the airflow carrying the lint is tangentially transported to the discharge frame 144 through the guide pipe 141, and forms a cyclone with the action of the annular baffle 145. The airflow is discharged through the exhaust hole, while the lint is left in the discharge frame 144 under the action of centrifugal force;

[0070] Step six, test end and cleaning: after reaching the preset test time, the dry lint tester 1 automatically stops running, closes the forward and reverse motor 74 and the laser dust particle counter 21, opens the visual door 5, loosens the clamping assembly 11 according to the operation of step two, takes out the tested non-woven fabric cylinder 12, opens the discharge valve on the discharge pipe 143, and discharges the collected lint in the discharge frame 144 along the discharge inclined seat 146 through the discharge pipe 143 and collects it. Clean up the residual lint in the test box 4, the discharge hopper 3 and the discharge frame 144, close the visual door 5, and complete a single test.

[0071] Step seven, data processing and analysis: export the test data through the dry lint tester 1, count the total number of lint of different particle sizes and the lint amount per unit time index, compare the preset standard to judge whether the lint performance of the non-woven fabric cylinder 12 is qualified, and generate a test report.

[0072] In combination with the actual needs at present, the above-mentioned embodiments adopted by the present statement do not limit the scope of protection, and various changes made within the knowledge range of those skilled in the art without departing from the concept of the present statement still fall within the protection scope of the present invention.

Claims

1. A nonwoven linting test apparatus, characterized by, The utility model relates to a dry state floc falling tester, which comprises a test box (4) fixedly installed at one end of the dry state floc falling tester (1), and a top cover (6) fixedly installed at the top of the test box (4). A discharge hopper (3) is fixedly installed in a circular hole formed in the middle of the bottom of the test box (4), and a floc falling collection assembly (14) is arranged on the discharge hopper (3). A laser dust particle counter (21) is fixedly installed in the middle of the inner wall of the floc falling collection assembly (14). The floc falling collection assembly (14) comprises a discharge frame (144) fixedly installed on the inner wall of the discharge hopper (3), and the inner wall of the discharge frame (144) is designed in a funnel shape. The laser dust particle counter (21) is fixedly installed in the middle of the inner wall of the discharge frame (144), and the laser dust particle counter (21) is electrically connected with the dry state floc falling tester (1). An unloading inclined seat (146) is fixedly installed on the inner bottom of the discharge frame (144), and an unloading pipe (143) extending out of the discharge hopper (3) is fixedly installed on the side of the discharge frame (144) close to the bottom end of the unloading inclined seat (146). The unloading pipe (143) is inclined, and an unloading valve is fixedly installed on the bottom end of the unloading pipe (143). A material guide pipe (141) is fixedly installed on the bottom end of the discharge hopper (3) and the top of one side of the discharge frame (144), and the material guide pipe (141) is in communication with the discharge frame (144). The top end of the material guide pipe (141) is tangent to the outer wall of the discharge frame (144). An annular stop seat (145) is fixedly installed on the inner top of the discharge frame (144), and an exhaust hole is formed in the discharge frame (144) and the discharge hopper (3), and a dustproof air-permeable net (142) is fixedly installed in the exhaust hole. A threaded sleeve (8) is fixedly installed in the middle of the top of the test box (4), and a threaded rod (9) is screwed to the inner wall of the threaded sleeve (8). A lifting disc (20) is fixedly installed on the bottom end of the threaded rod (9), and support rods (13) are fixedly installed at equal distances on the inner wall top of the discharge hopper (3). A clamping assembly (11) is fixedly installed on one end of each support rod (13) and the outer wall of the lifting disc (20). A non-woven fabric cylinder (12) is clamped between the two clamping assemblies (11). A reciprocating lifting mechanism (7) is fixedly installed on the test box (4) to drive the upper clamping assembly (11) to lift. ​ The clamping assembly (11) is provided with an airflow impact assembly (10), the airflow impact assembly (10) comprises an inner ring frame (106) fixedly installed at the top of the inner sleeve (114), and the circumferential outer wall of the inner ring frame (106) is rotatably connected with an outer ring frame (109) through a sealing bearing, the inner wall of the outer ring frame (109) and the outer wall of the inner ring frame (106) are both provided with a plurality of communication holes (1017) in communication with each other, the inner wall of the inner ring frame (106) is fixedly provided with a first connecting pipe (1012) penetrating through the lifting disc (20) at equal distances, and the bottom end of the first connecting pipe (1012) is fixedly provided with a same inner ring spray frame (1015), the bottom of the inner ring spray frame (1015) is fixedly provided with inner nozzles (1016) distributed at equal distances, the inner nozzles (1016) are outwardly directed, the outer wall of the outer ring frame (109) is fixedly provided with second connecting pipes (1011) distributed at equal distances, and the bottom end of the second connecting pipe (1011) is fixedly provided with a same outer ring spray frame (1010) sleeved on the outer wall of the outer sleeve (111), the bottom of the outer ring spray frame (1010) is fixedly provided with outer nozzles (1014) distributed at equal distances, and the outer nozzles (1014) are inwardly directed, one side of the top of the test box (4) is fixedly provided with an air storage cylinder (101), the top of the air storage cylinder (101) is fixedly provided with a pressure stabilizing pipe (102) extending out of the top cover (6), one side of the bottom of the air storage cylinder (101) is fixedly provided with an air inlet pipe, one end of the air inlet pipe is fixedly provided with a first one-way valve (103) only for air inlet, one side of the outer ring frame (109) is fixedly provided with a gas guide pipe (108), and one end of the gas guide pipe (108) is fixedly provided with a second one-way valve (1013), the second one-way valve (1013) only allows gas to enter the gas guide pipe (108), one end of the second one-way valve (1013) and the bottom of the air storage cylinder (101) are fixedly provided with a corrugated pipe (104), one side of the bottom of the air storage cylinder (101) and one side of the top of the test box (4) are provided with a first movable hole, and the inner wall of the first movable hole is fixedly provided with a sealing sleeve (1018), the inner wall of the sealing sleeve (1018) is inserted with an L-shaped pull rod (105), one end of the L-shaped pull rod (105) is fixedly connected with one end of the lifting plate (73), and the bottom of the L-shaped pull rod (105) and the top of the gas guide pipe (108) are fixedly provided with a connecting column (107), the top end of the L-shaped pull rod (105) is fixedly provided with a piston disc (1019) inserted in the air storage cylinder (101), and the outer wall of the piston disc (1019) is fixedly provided with a piston sleeve abutting the inner wall of the air storage cylinder (101). The inner wall of two said clamping assemblies (11) is fixedly installed with a stirring assembly (19), the stirring assembly (19) comprises L-shaped reinforcing rods (194) fixedly installed on the inner wall of the inner sleeve (114) and the lifting disc (20) at equal distances, and the bottom end of the L-shaped reinforcing rod (194) is fixedly installed with a same fixing cylinder (191), the bottom middle of the fixing cylinder (191) is provided with a second movable hole, the inner wall of the second movable hole is inserted with a movable rod (192), the bottom end of the movable rod (192) is fixedly installed with a buffer pad (193), and the top end of the movable rod (192) is provided with a insertion hole (1912), the top inner wall of the fixing cylinder (191) is fixedly installed with a fixing rod (199) inserted in the insertion hole (1912), the bottom of the fixing rod (199) and the bottom of the insertion hole (1912) are fixedly installed with a third spring (1913), the circumference of the fixing cylinder (191) is provided with third movable holes distributed at equal distances, and the inner wall of the third movable hole is fixedly installed with a guide sleeve (196), the inner wall of the guide sleeve (196) is inserted with a stirring rod (197), one end of the stirring rod (197) is fixedly installed with an air bag pad (198), the other end of the stirring rod (197) is rotatably connected with a pulley (1910) through a pin shaft, the outer wall of the movable rod (192) is fixedly installed with a conical seat (195) for extruding the pulley (1910) to move horizontally, the outer wall of the stirring rod (197) is fixedly installed with a fixed ring, and the side of the fixed ring and the side of the guide sleeve (196) are fixedly installed with a second spring (1911).

2. A nonwoven lint test device according to claim 1, wherein, Both said clamping assemblies (11) comprise an inner sleeve (114) and an outer sleeve (111) sleeved outside the inner sleeve (114), and the sections of the inner sleeve (114) and the outer sleeve (111) are designed as L-shaped, the outer wall of the lifting disc (20) is fixedly connected with the inner wall of the inner sleeve (114), and one end of the supporting rod (13) is fixedly connected with the outer wall of the inner sleeve (114), the outer wall corner of the inner sleeve (114) is provided with an annular groove (117), the outer sleeve (111) is fixedly provided with a telescopic pipe (116) inserted into the annular groove (117), the top of the telescopic pipe (116) and the top of the annular groove (117) are fixedly installed with a first spring (118), the top of the outer sleeve (111) and the edge of the corner of the top of the inner sleeve (114) are fixedly installed with a fourth corrugated sheath (113), and the outer wall top of the outer sleeve (111) is fixedly provided with a poking frame (112), the outer wall bottom of the inner sleeve (114) is fixedly provided with rotation seats distributed at equal distances, and the rotation seats are all rotationally connected with clamping seats (115) through pin shafts, the non-woven fabric barrel (12) is clamped at the gap between one side of the clamping seat (115) and the outer wall of the inner sleeve (114), the inner wall bottom of the outer sleeve (111) and the other side of the clamping seat (115) are both designed as inclined surfaces, the other side of the clamping seat (115) is provided with a traction groove (119), the inner wall bottom of the outer sleeve (111) is fixedly provided with a traction block (1111) inserted into the traction groove (119), and the section of the traction block (1111) and the traction groove (119) are both designed as T-shaped.

3. A nonwoven lint test device according to claim 2, wherein, The outer wall bottom of the inner sleeve (114) is fixedly provided with first convex strips (1110) distributed at equal distances, and one side of the clamping seat (115) is fixedly provided with second convex strips (1112) distributed at equal distances, the positions of the second convex strips (1112) are staggered with the positions of the first convex strips (1110).

4. A nonwoven lint test device according to claim 3, wherein, Said reciprocating lifting mechanism (7) comprises a supporting plate (71) fixedly installed on the inner wall of one end of the test box (4), and a threaded column (75) is rotationally connected to the supporting plate (71), a positive and negative rotation motor (74) for driving the threaded column (75) to rotate is fixedly installed on the top of the test box (4), a lifting plate (73) is screwed on the threaded column (75), one end of the lifting plate (73) is provided with a guide hole (76), a guide column (72) penetrating through the guide hole (76) is fixedly installed on the top of the supporting plate (71) and the inner wall of the top of the test box (4), the other end of the lifting plate (73) is provided with a connecting hole, and the outer wall of the threaded rod (9) is rotationally connected with the inner wall of the connecting hole through a bearing.

5. A nonwoven lint test device according to claim 4, wherein, The bottom end of the lifting plate (73) and the top of the support plate (71), the top end of the lifting plate (73) and the inner wall of the top of the test box (4), and the other end of the top of the lifting plate (73) and the inner wall of the top of the test box (4) are respectively fixedly installed with a first corrugated sheath (16), a second corrugated sheath (17) and a third corrugated sheath (18), and the first corrugated sheath (16) and the second corrugated sheath (17) are sleeved outside the threaded column (75), and the third corrugated sheath (18) is sleeved outside the threaded rod (9).

6. A nonwoven lint test device according to claim 5, wherein, The bottom inner wall of the test box (4) is fixedly installed with a discharging seat (15), the top of the discharging seat (15) is designed in a spherical shape, a through hole communicating with the discharge hopper (3) is formed in the middle of the discharging seat (15), an observation port is formed on one side of the test box (4), and a visual door (5) is arranged on the observation port, and a support frame (2) is fixedly installed on the bottom of the test box (4) and the bottom of the dry-state fiber falling tester (1), and a plurality of moving wheels are fixedly installed on the bottom of the support frame (2).

7. A method for testing the linting of a nonwoven fabric, using a device for testing the linting of a nonwoven fabric according to any one of claims 1 to 6, characterized in that The method comprises the following steps: Step one, device pretreatment: open the visual door (5) on one side of the test box (4), check whether the clamping assembly (11), airflow impact assembly (10), stirring assembly (19) and fiber falling collection assembly (14) inside the test box (4) are in normal state, ensure that the laser dust particle counter (21) and the dry-state fiber falling tester (1) are electrically connected normally, and clean the residual fiber falling in the test box (4), discharge hopper (3) and discharge frame (144); Step two, non-woven fabric tube installation: pull the stirring frame (112) on the outer wall of the outer sleeve (111), the outer sleeve (111) drives the telescopic tube (116) to move upwards along the annular groove (117) and compresses the first spring (118), at the same time, the traction block (1111) on the inner wall of the outer sleeve (111) cooperates with the traction groove (119) to drive the clamping seat (115) to rotate outward around the rotating seat, so that all the clamping seats (115) are unfolded, at this time, the non-woven fabric tube (12) to be tested is sleeved outside the inner sleeve (114), then the stirring frame (112) is loosened, the first spring (118) is reset to drive the outer sleeve (111) to move downwards, the traction block (1111) pushes the clamping seat (115) to rotate inward, so that the clamping seat (115) on one side clamps the non-woven fabric tube (12) cooperated with the outer wall of the inner sleeve (114), repeat the above clamping operation, clamp the top and bottom of the non-woven fabric tube (12) through two clamping assemblies (11) respectively; Step three, test parameter setting: start the dry-state fiber falling tester (1), set the test time to 10-20 minutes, the lifting frequency of the reciprocating lifting mechanism (7) to 1-3 times / minute, and turn on the laser dust particle counter (21), set the particle size range of the particle count to 0.3μm, 0.5μm and 5μm, so that it enters the data detection state; Step four, the operation of the shedding test: start the forward and reverse motor (74) in the reciprocating lifting mechanism (7), the forward and reverse motor (74) drives the threaded column (75) to rotate forward and backward, the threaded column (75) drives the lifting plate (73) to move up and down along the guide column (72), the lifting plate (73) drives the threaded rod (9) and the upper clamping assembly (11) to lift, and the screw connection of the threaded sleeve (8) is matched, so that the upper clamping assembly (11) rotates synchronously, thereby driving the non-woven fabric cylinder (12) to twist. At the same time, the L-shaped pull rod (105) drives the piston disc (1019) to move up and down in the air cylinder (101), when the piston disc (1019) moves down, the gas in the air cylinder (101) enters the outer ring frame (109) through the corrugated pipe (104), the second one-way valve (1013) and the air guide pipe (108), part of the gas enters the inner ring frame (106) through the communication hole (1017), the gas entering the outer ring frame (109) is transported to the outer ring spray frame (1010) through the second connecting pipe (1011), and the outer spray head (1014) sprays gas flow to the outer wall of the non-woven fabric cylinder (12), the gas entering the inner ring frame (106) is transported to the inner ring spray frame (1015) through the first connecting pipe (1012), and the inner spray head (1016) sprays gas flow to the inner wall of the non-woven fabric cylinder (12), the synchronous impact of the inner and outer walls promotes the shedding of the non-woven fabric cylinder (12), and when the upper clamping assembly (11) lifts, the material stirring assembly (19) moves synchronously, the two material stirring assemblies (19) impact each other, push the movable rod (192) to move up and down along the fixed cylinder (191), drive the conical seat (195) to extrude the pulley (1910), make the stirring rod (197) move transversely along the guide sleeve (196), and the air bag pad (198) contacts and stirs the inner wall of the non-woven fabric cylinder (12), which helps to loosen the falling fibers and separate them. The second spring (1911) and the third spring (1913) drive the stirring rod (197) to return when the movable rod (192) resets, realizing reciprocating stirring; Step five, the collection and detection of the falling fibers: during the test, the falling fibers are gathered along the spherical discharge seat (15) at the bottom of the test box (4) to the discharge hopper (3) under the action of gravity and airflow. At this time, the laser dust particle counter (21) detects the particle number and particle size distribution of the falling fibers in the discharge frame (144) in real time, transmits the data to the dry falling fiber tester (1) for real-time recording and storage, and at the same time, the airflow carrying the falling fibers is transported to the discharge frame (144) along the tangent through the material guide pipe (141), and the rotating flow is formed by cooperating with the annular baffle (145), the airflow is discharged through the exhaust hole, and the falling fibers are left in the discharge frame (144) under the action of centrifugal force. Step six, test end and clean up: after reaching the preset test time, the dry-state lint test instrument (1) automatically stops running, the forward and reverse motor (74) and the laser dust particle counter (21) are turned off, the visible door (5) is opened, the clamping assembly (11) is loosened according to the operation of step two, the tested non-woven fabric cylinder (12) is taken out, the unloading valve on the unloading pipe (143) is opened, the collected lint in the unloading frame (144) is discharged along the unloading inclined seat (146) through the unloading pipe (143) and collected, the remaining lint in the test box (4), the discharge hopper (3) and the unloading frame (144) is cleaned up, the visible door (5) is closed, and a single test is completed; Step seven, data processing and analysis: export the test data through the dry-state lint test instrument (1), count the total number of lint of different particle sizes and the lint amount per unit time index, compare the preset standard to judge whether the lint performance of the non-woven fabric cylinder (12) is qualified, and generate a test report.

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