Medical melt-blown non-woven fabric performance detection device

Abstract

The invention discloses a medical melt-blown non-woven fabric performance detection device, and belongs to the technical field of melt-blown non-woven fabric production.The medical melt-blown non-woven fabric performance detection device is provided with a transmission mechanism, a solution pressurizing mechanism, a gas pressurizing mechanism and a spraying mechanism, and liquid in a liquid pressurizing cavity and gas in a gas cavity are mixed and enter a mixing channel; the gas is guided into the gas-liquid storage cavity through the mixing channel for temporary storage, the gas is accelerated under the pushing of pressure to form turbulent flow, and the turbulent flow carries the liquid to reach the guide pipes through the channel and is ejected to two surfaces of the non-woven fabric through the two guide pipes, so that the waterproofness of the front surface and the water permeability of the back surface of the non-woven fabric are simultaneously tested; the wearing comfort degree is determined by the balance of the waterproofness and the air permeability of the two sides.

Description

Technical Field

[0001] The present invention relates to the field of meltblown nonwoven fabric production technology, and in particular to a device for detecting the performance of medical meltblown nonwoven fabrics. Background Art

[0002] Meltblown nonwoven fabric is a kind of ultra-fine fiber nonwoven fabric made of polypropylene as the main raw material through a special process; The performance testing items of meltblown nonwoven fabrics mainly include appearance quality testing, internal quality testing and microbial index testing. Among them, water stickiness testing is a testing item for the waterproof performance of nonwoven fabrics, which is crucial for application scenarios that require waterproof functions and is mainly related to its application requirements and protective performance; Through the water wetting test, we can observe the performance of the mask material after contact with water. The general test method is to put the non-woven fabric on the support ring or clamp ring, and then spray a specified volume of distilled water or deionized water on the non-woven fabric. After the spraying, the sample is compared with the standard wetting card or the evaluation standard picture for evaluation. The evaluation results are usually divided into 1-5 levels. The higher the level, the better the waterproof performance of the sample. However, this test method can only test the waterproofness of one side. When non-woven fabrics are made into medical masks and used, the balance of waterproofness and breathability on both sides determines the wearing comfort. For example, when the waterproofness of the outer side is too high, some breathability will be sacrificed, causing difficulty in breathing for the wearer, while too low waterproofness will cause the outer side to be unable to effectively block the penetration of moisture. When the waterproofness of the inner side is too high, moisture will accumulate in the mask and cause discomfort to the wearer. Therefore, it is necessary to spray liquid on both sides of the non-woven fabric at the same time to simulate the water-stickiness of the non-woven fabric when actually worn. Summary of the invention

[0003] The purpose of the present invention is to propose a medical meltblown nonwoven fabric performance testing device to solve the problem that the detection method of only testing the waterproofness of one side of the nonwoven fabric cannot meet the need of simultaneously testing whether the waterproofness and air permeability of both sides of the nonwoven fabric are balanced.

[0004] In order to achieve the above purpose, the present invention adopts the following technology: a medical meltblown nonwoven fabric performance testing device: The detection device comprises a base placed on a table and a shell arranged on the base, a mounting frame is installed on the shell, a non-woven fabric is fixed on the mounting frame, a transmission mechanism is arranged inside the shell, the transmission mechanism comprises a rotating wheel rotatably arranged in the shell and two swinging frames that swing back and forth up and down with the rotation of the rotating wheel, and a solution pressurizing mechanism and a gas pressurizing mechanism are respectively arranged on the swinging frames; The solution pressurizing mechanism comprises a liquid pressurizing chamber installed in the housing and a first piston slidably embedded in the liquid pressurizing chamber, and the first piston moves up and down with the swing of the swing frame to suck in and push the liquid; The gas pressurizing mechanism comprises a gas pressurizing chamber arranged in the housing and a second piston slidably embedded in the gas pressurizing chamber, and the second piston moves up and down with the swing of the swing frame to inhale and push the gas; Two spraying mechanisms are installed on the shell, and the spraying mechanism includes a shell arranged at the upper and lower sides of the non-woven fabric and a conduit arranged on the shell. The liquid in the liquid pressurizing chamber and the gas in the gas chamber are mixed and enter the shell. The gas is accelerated by the pressure to form turbulence and the liquid is sprayed through the conduit onto the non-woven fabric. The power source of the swing frame is a driving mechanism installed in the shell.

[0005] As a further description of the above-mentioned technology, a medical meltblown nonwoven fabric performance testing device is as follows: The transmission mechanism also includes a mounting seat installed in the housing, and a first rotating shaft and a second rotating shaft are rotatably arranged on the mounting seat; The rotating wheel is rotatably arranged on the first rotating shaft, and a third rotating shaft is arranged on the rotating wheel; The swing frame is rotatably arranged on the second rotating shaft, and a limiting groove is provided on the swing frame, a limiting block is slidably embedded in the limiting groove, and the middle part of the limiting block is rotatably connected to the third rotating shaft; The swing frame is provided with a guide groove, in which a guide block is slidably embedded, a connecting rod is rotatably provided in the middle of the guide block, and the end of the connecting rod is connected with the solution pressurizing mechanism.

[0006] As a further description of the above-mentioned technology, a medical meltblown nonwoven fabric performance testing device is as follows: The rotating wheel is provided with a slide groove, and threaded rods are rotatably provided at both ends of the slide groove, and a twisting wheel is connected to one side of the threaded rod close to the outer edge of the rotating wheel, and the twisting wheel runs through the slide groove and the rotating wheel; A slider is slidably embedded in the slide groove, and a thread is arranged in the middle of the slider. The threaded rod passes through the middle of the slider and meshes with the slider. A third rotating shaft is installed on the slider. When the slider moves, the distance between the first rotating shaft and the third rotating shaft changes.

[0007] As a further description of the above-mentioned technology, a medical meltblown nonwoven fabric performance testing device is as follows: The solution pressurizing mechanism also includes a liquid storage chamber installed in the housing, the liquid storage chamber is connected to a water inlet pipe, a one-way valve is installed at the end of the water inlet pipe, the other end of the one-way valve is connected to a connecting pipe, and the liquid pressurizing chamber is installed on the connecting pipe; A first push rod is installed at the bottom of the first piston, and the first push rod passes through the bottom of the liquid pressurizing chamber and is connected to the connecting rod; A flow guide pipe is installed on the connecting pipe, and the flow guide pipe is connected with the spraying mechanism.

[0008] As a further description of the above-mentioned technology, a medical meltblown nonwoven fabric performance testing device is as follows: The gas pressurizing mechanism also includes an air cavity installed in the shell, the gas pressurizing cavity is installed in the air cavity, the top of the second piston is connected to a second push rod that passes through the top of the air cavity, and the end of the second push rod is hingedly installed with a hinge shaft, and the hinge shaft is fixedly installed on the swing frame; The two ends of the gas pressurizing chamber are respectively connected with an air inlet pipe penetrating to the outside of the shell and an air outlet pipe communicating with the guide pipe.

[0009] As a further description of the above-mentioned technology, a medical meltblown nonwoven fabric performance testing device is as follows: The spraying mechanism also includes a mixing channel connected to the guide pipe, the gas and liquid in the guide pipe and the air outlet pipe are collected through the mixing channel, the end of the mixing channel is connected to a gas-liquid storage cavity, and a channel is opened on the surface of the gas-liquid storage cavity, and the catheter is installed at the channel.

[0010] As a further description of the above-mentioned technology, a medical meltblown nonwoven fabric performance testing device is as follows: The surface of the conduit is provided with a thinning sheet, and a plurality of thinning channels are opened on the surface of the thinning sheet and are arranged to be inwardly concave, so that the liquid inlet end of the thinning channel expands and the liquid outlet end contracts, and after the gas-liquid mixture enters the conduit, it is blocked and stored through the thinning channel; After the catheter completes energy storage, the thinning sheet is squeezed and deformed to bulge, the liquid inlet end of the thinning channel shrinks, and the liquid outlet end expands, and the gas-liquid mixture forms an aerosol and is discharged through the thinning channel.

[0011] As a further description of the above-mentioned technology, a medical meltblown nonwoven fabric performance testing device is as follows: The spraying mechanism also includes a bearing mounted on the housing, a knob is rotatably arranged in the middle of the bearing, the knob penetrates the outside of the guide plate and is connected to the surface of the housing, and the housing can rotate with the bearing as the axis; The conduit is fixedly installed in the housing, and a blocking plate is arranged on the end of the conduit, the blocking plate comprises an inner embedded part rotatably arranged in the gas-liquid storage cavity and an outer attached part rotatably arranged outside the gas-liquid storage cavity, and the conduit is closed when the inner embedded part of the blocking plate rotates to the channel; When the conduit is opened, the inner embedded part of the blocking plate is removed from the channel, and the outer sticking part is always stuck to the channel during rotation.

[0012] As a further description of the above-mentioned technology, a medical meltblown nonwoven fabric performance testing device is as follows: A spray head is arranged on the top of the shell, a spray pipe connected to the liquid storage chamber is arranged on the spray head, and a regulating valve is installed on the spray pipe to control opening and closing; An arc-shaped guide plate is installed on the shell, a bearing is fixed on the guide plate and a knob passes through the guide plate. After the shell rotates to close the conduit, the outer wall of the shell is level with the surface of the guide plate.

[0013] As a further description of the above-mentioned technology, a medical meltblown nonwoven fabric performance testing device is as follows: The driving mechanism comprises a power source arranged in a housing, a driving wheel is sleeved on the output end of the power source, a driven wheel is sleeved on the middle of the first rotating shaft, and a transmission belt for transmission is sleeved on the surface of the driving wheel and the reduction motor.

[0014] In summary, due to the use of the above-mentioned technology, a medical melt-blown nonwoven fabric performance testing device has the following beneficial effects: 1. Through the transmission mechanism, solution pressurizing mechanism, gas pressurizing mechanism and spraying mechanism, the liquid in the liquid pressurizing chamber and the gas in the gas chamber are mixed into the mixing channel, and are introduced into the gas-liquid storage chamber through the mixing channel for temporary storage. Under the pressure, the gas is accelerated to form turbulence and carries the liquid through the channel to the conduit, and is sprayed out to both sides of the non-woven fabric through two conduits, thereby achieving the simultaneous testing of the waterproofness of the front side of the non-woven fabric and the water permeability of the back side. The balance of waterproofness and air permeability on both sides determines the wearing comfort; 2. Through the provided slide groove and slider, by rotating the twist, the twist drives the threaded rod to rotate inside the slide groove. Under the restriction of the slide groove, the slider cannot rotate with the threaded rod. Therefore, under the cooperation of the thread, the slider can only move horizontally along the length direction of the slide groove, and the slider drives the third rotating shaft to move. With the movement of the slider, the distance between the first rotating shaft and the third rotating shaft changes, and the moving radius of the third rotating shaft when the rotating wheel rotates is reduced. Therefore, the amplitude of pushing and pulling the swing frame up and down is also reduced. The swing frame drives the first piston to move in the liquid pressurization chamber and the second piston to move in the gas pressurization chamber. The distance is also shortened, and the negative pressure formed in the liquid pressurization chamber and the gas pressurization chamber is reduced. Therefore, the amount of solution entering the liquid pressurization chamber and the amount of air entering the gas pressurization chamber is also reduced, thereby achieving the purpose of adjusting the amount of gas-liquid mixture sprayed by the spraying mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the three-dimensional structure of a medical meltblown nonwoven fabric performance testing device is shown; Figure 2 A schematic diagram of a three-dimensional cross-sectional structure of a medical meltblown nonwoven fabric performance testing device is shown; Figure 3 A first stereoscopic schematic diagram showing the internal structure of the housing; Figure 4 Shows Figure 2 A schematic diagram of the enlarged structure at A in the middle; Figure 5A second perspective schematic diagram showing the internal structure of the housing; Figure 6 A first three-dimensional structural schematic diagram of the transmission mechanism and the solution pressurizing mechanism is shown; Figure 7 A second three-dimensional structural schematic diagram of the transmission mechanism and the solution pressurizing mechanism is shown; Figure 8 A schematic diagram of the top cross-sectional structure of the transmission mechanism is shown; Fig. 9 Shows Figure 8 A schematic diagram of the enlarged structure at B in the middle; Fig.10 A schematic diagram of the side cross-sectional structure of the transmission mechanism is shown; Fig.11 A schematic diagram of the three-dimensional structure of the solution pressurizing mechanism and the gas pressurizing mechanism is shown; Fig.12 A schematic diagram of the front cross-sectional structure of the solution pressurizing mechanism and the gas pressurizing mechanism is shown; Fig.13 Shows Fig.12 Schematic diagram of the enlarged structure at C in the middle; Fig.14 A schematic diagram of the three-dimensional structure of the driving mechanism and the transmission mechanism is shown; Fig.15 A schematic diagram of the three-dimensional structure of the spraying mechanism is shown; Fig.16 A schematic diagram of the front cross-sectional structure of the spraying mechanism is shown; Fig.17 A schematic diagram of a three-dimensional cross-sectional structure showing a spray mechanism in a rotationally closed state; Fig.18 A schematic diagram of the front cross-sectional structure of the refinement sheet is shown.

[0016] Legend: 10. Testing equipment; 11. Shell; 111. Guide plate; 112. Inspection port; 113. Support frame; 12. Sprinkler head; 121. Regulating valve; 122. Sprinkler pipe; 13. Base; 131. Drainage channel; 14. Mounting frame; 20. Transmission mechanism; 21. Mounting seat; 22. First rotating shaft; 23. Second rotating shaft; 24. Rotating wheel; 241. Sliding groove; 242. Threaded rod; 243. Twist; 244. Sliding block; 25. Third rotating shaft; 26. Swinging frame; 27. Limiting groove; 28. Limiting block; 29. ​​Guide groove; 210. Guide block; 211. Connecting rod; 30. Solution pressurizing mechanism; 31. Water inlet pipe; 32. One-way valve; 33. Connecting pipe; 34. Liquid pressurizing chamber; 35. First piston; 36. First push rod; 37. Guide pipe; 38. Liquid storage chamber; 40. driving mechanism; 41. reduction motor; 42. driving wheel; 43. transmission belt; 44. driven wheel; 50. Gas pressurizing mechanism; 51. Gas cavity; 52. Air inlet pipe; 53. Gas pressurizing chamber; 54. Air outlet pipe; 55. Second piston; 56. Second push rod; 57. Articulated shaft; 60. Spraying mechanism; 61. Housing; 62. Mixing channel; 63. Gas-liquid storage chamber; 64. Channel; 65. Blocking plate; 66. Conduit; 661. Refining sheet; 662. Refining channel; 67. Bearing; 68. Knob. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technology in the embodiments of the present invention, a medical meltblown nonwoven fabric performance detection device. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In order to solve the problem that the detection method of only testing the waterproofness of one side of the non-woven fabric cannot meet the demand of simultaneously testing whether the waterproofness and air permeability of both sides of the non-woven fabric are balanced, the present invention proposes a medical melt-blown non-woven fabric performance detection device, such as Figure 1 - Fig.18 As shown: The detection device 10 includes a base 13 placed on a desktop and a housing 11 arranged on the base 13, a mounting frame 14 is installed on the housing 11, a non-woven fabric is fixed on the mounting frame 14, and a transmission mechanism 20 is arranged inside the housing 11. Figure 6 and Figure 7 As shown, the transmission mechanism 20 includes a rotating wheel 24 rotatably disposed in the housing 11 and two swing frames 26 that swing back and forth up and down with the rotation of the rotating wheel 24. The swing frames 26 are respectively provided with a solution pressurizing mechanism 30 and a gas pressurizing mechanism 50. Figure 3 and Figure 5 As shown; A plurality of support frames 113 are disposed in the housing 11, and the transmission mechanism 20 and the gas pressurizing mechanism 50 are both placed on the support frames 113; The transmission mechanism 20 further includes a mounting seat 21 mounted in the housing 11, and a first rotating shaft 22 and a second rotating shaft 23 are rotatably disposed on the mounting seat 21; The rotating wheel 24 is rotatably disposed on the first rotating shaft 22, and a third rotating shaft 25 is disposed on the rotating wheel 24; The swing frame 26 is rotatably disposed on the second rotating shaft 23, and a limiting groove 27 is provided on the swing frame 26, a limiting block 28 is slidably embedded in the limiting groove 27, and the middle part of the limiting block 28 is rotatably connected to the third rotating shaft 25; When it is necessary to drive the swing frame 26 to swing back and forth up and down, the first rotating shaft 22 is rotated so that the first rotating shaft 22 drives the rotating wheel 24 to rotate under the restriction of the mounting seat 21, and at the same time the rotating wheel 24 drives the third rotating shaft 25 to rotate, and the third rotating shaft 25 drives the limit block 28 to slide under the restriction of the limit groove 27 as it rotates. Since the swing frame 26 is rotatably sleeved on the limit groove 27, when the distance between the third rotating shaft 25 and the second rotating shaft 23 is shortened, the limit block 28 can cooperate with the limit groove 27 to lift or press down the swing frame 26, thereby realizing the reciprocating up and down swing of the swing frame 26.

[0019] The swing frame 26 is provided with a guide groove 29, in which a guide block 210 is slidably embedded. A connecting rod 211 is rotatably provided in the middle of the guide block 210, and the end of the connecting rod 211 is connected to the solution pressurizing mechanism 30. Figure 6 and Figure 7 As shown; The solution pressurizing mechanism 30 includes a liquid pressurizing chamber 34 installed in the housing 11 and a first piston 35 slidably embedded in the liquid pressurizing chamber 34. The first piston 35 moves up and down with the swing of the swing frame 26 to suck and push the liquid. The solution pressurizing mechanism 30 further includes a liquid storage chamber 38 installed in the housing 11, and the liquid storage chamber 38 is installed on the support frame 113; The liquid storage chamber 38 is connected to a water inlet pipe 31, and a one-way valve 32 is installed at the end of the water inlet pipe 31. The other end of the one-way valve 32 is connected to a connecting pipe 33, and the liquid pressurizing chamber 34 is installed on the connecting pipe 33. A first push rod 36 is installed at the bottom of the first piston 35. The first push rod 36 passes through the bottom of the liquid pressurizing chamber 34 and is connected to the connecting rod 211. A flow guide pipe 37 is installed on the connecting pipe 33, and the flow guide pipe 37 is connected to the spraying mechanism 60; When the swing frame 26 swings up and down, the guide block 210 embedded in the guide groove 29 is driven to slide back and forth through the guide groove 29. The guide block 210 drives the connecting rod 211 to move up and down during the sliding process, thereby pushing and pulling the first push rod 36. The first push rod 36 drives the first piston 35 to move inside the liquid pressurizing chamber 34. When the first piston 35 moves downward, negative pressure is generated in the liquid pressurizing chamber 34, and the solution in the guide pipe 37 is sucked out through the water inlet pipe 31. The solution enters the one-way valve 32 through the water inlet pipe 31. Under the restriction of the one-way valve 32, the solution cannot flow back. After the solution in the one-way valve 32 flows out of the one-way valve 32, it enters the liquid pressurizing chamber 34 through the connecting pipe 33 for temporary storage, and is moved out of the liquid pressurizing chamber 34 when the swing frame 26 pushes the first piston 35 to rise. Driven by the internal pressure of the liquid pressurizing chamber 34, it reaches the spraying mechanism 60 through the guide pipe 37, and the solution delivery operation is completed.

[0020] The gas pressurizing mechanism 50 includes a gas pressurizing chamber 53 disposed in the housing 11 and a second piston 55 slidably embedded in the gas pressurizing chamber 53. Figure 10-13 As shown, the second piston 55 moves up and down with the swing of the swing frame 26 to suck in and push the gas; The gas pressurizing mechanism 50 further includes an air cavity 51 installed in the housing 11, a gas pressurizing cavity 53 is installed in the air cavity 51, a second push rod 56 penetrating the top of the air cavity 51 is connected to the top of the second piston 55, and a hinge shaft 57 is hingedly installed at the end of the second push rod 56, and the hinge shaft 57 is fixedly installed on the swing frame 26; The two ends of the gas pressurizing chamber 53 are respectively connected with an air inlet pipe 52 penetrating to the outside of the shell 11 and an air outlet pipe 54 communicating with the guide pipe 37; When the swing frame 26 swings up and down, the swing frame 26 drives the second push rod 56 to rise and fall through the hinge shaft 57. Since the second push rod 56 and the hinge shaft 57 are hingedly connected, although the position of the hinge shaft 57 is not always directly above the second push rod 56, it can still apply thrust and pressure to the second push rod 56, thereby pushing the second push rod 56 to move within the restriction of the air cavity 51. When the second piston 55 moves upward, it pulls the second piston 55 and forms a negative pressure inside the gas pressurization chamber 53. Air is injected into the gas pressurization chamber 53 through the air inlet pipe 52. A one-way valve is provided on the side of the gas pressurization chamber 53 close to the air inlet pipe 52 to prevent its backflow. When the swing frame 26 descends and drives the second piston 55 downward, the air in the gas pressurization chamber 53 is introduced into the spray mechanism 60 through the air outlet pipe 54, and the air delivery operation is completed.

[0021] In order to adjust and control the amount of the gas-liquid mixture to be sprayed on the surface of the non-woven fabric by the spraying mechanism 60, as shown in FIG. Figure 8 and Fig. 9As shown, a slide groove 241 is provided on the rotating wheel 24, and threaded rods 242 are rotatably provided at both ends of the slide groove 241. A twisting knob 243 is connected to the threaded rod 242 near the outer edge of the rotating wheel 24. The twisting knob 243 passes through the slide groove 241 and the rotating wheel 24. A slider 244 is slidably embedded in the slide groove 241, and a thread is set in the middle of the slider 244. The threaded rod 242 passes through the middle of the slider 244 and meshes with the slider 244. The slider 244 is installed with a third shaft 25. By rotating the twist 243, the twist 243 drives the threaded rod 242 to rotate in the slide groove 241. Under the restriction of the slide groove 241, the slider 244 cannot rotate with the threaded rod 242. Therefore, under the cooperation of the thread, the slider 244 can only move horizontally along the length direction of the slide groove 241. The slider 244 drives the third shaft 25 to move. As the slider 244 moves, the first The distance between the rotating shaft 22 and the third rotating shaft 25 changes, and the moving radius of the third rotating shaft 25 when rotating with the rotating wheel 24 is reduced, so the amplitude of pushing and pulling the swing frame 26 to swing up and down is also reduced, and the distance that the swing frame 26 drives the first piston 35 to move in the liquid pressurizing chamber 34 and the second piston 55 to move in the gas pressurizing chamber 53 is also shortened, and the negative pressure formed in the liquid pressurizing chamber 34 and the gas pressurizing chamber 53 is reduced, so the amount of solution entering the liquid pressurizing chamber 34 and the amount of air entering the gas pressurizing chamber 53 is also reduced, thereby achieving the purpose of adjusting the amount of gas-liquid mixture sprayed by the spraying mechanism 60; An inspection opening 112 is provided on the housing 11 , and a worker can adjust the position of the third rotating shaft 25 after opening the inspection opening 112 .

[0022] Two spraying mechanisms 60 are installed on the housing 11. Figure 4 , Figure 15-17 As shown, the spraying mechanism 60 includes a shell 61 disposed at the upper and lower sides of the non-woven fabric and a conduit 66 disposed on the shell 61; The spraying mechanism 60 further includes a mixing channel 62 connected to the flow guide tube 37, the end of the mixing channel 62 is connected to a gas-liquid storage chamber 63, and a channel 64 is opened on the surface of the gas-liquid storage chamber 63, and a conduit 66 is installed at the channel 64; The liquid in the liquid pressurizing chamber 34 and the gas in the gas chamber 51 mix and enter the mixing channel 62, and are introduced into the gas-liquid storage chamber 63 through the mixing channel 62 for temporary storage. The gas is accelerated under pressure to form turbulence and carry the liquid through the channel 64 to the conduit 66, and are sprayed out to both sides of the non-woven fabric through the two conduits 66, thereby simultaneously testing the waterproofness of the front side and the water permeability of the back side of the non-woven fabric. The balance between the waterproofness and air permeability on both sides determines the wearing comfort.

[0023] At the same time, in order to improve the penetration and uniformity of the gas-liquid mixture sprayed through the conduit 66, a thinning sheet 661 is provided on the surface of the conduit 66. A plurality of thinning channels 662 are opened on the surface of the thinning sheet 661 and are arranged to be inwardly concave, so that the liquid inlet end of the thinning channel 662 is expanded and the liquid outlet end is contracted. After the gas-liquid mixture enters the conduit 66, it is blocked and stored through the thinning channel 662. After the catheter 66 completes energy storage, the thinning sheet 661 is squeezed and deformed into a convex shape, the liquid inlet end of the thinning channel 662 contracts, and the liquid outlet end expands. The gas-liquid mixture undergoes intense friction with its inner wall when passing through the thinning channel 662, and part of the solution evaporates and forms an aerosol with the air, which is discharged through the thinning channel 662 and reaches the surface of the non-woven fabric, thereby simulating the splashing scene of body fluids when the wearer sneezes.

[0024] In order to control the opening and closing of the spraying mechanism 60, Figure 4 , Fig.16 and Fig.17 As shown, the spraying mechanism 60 further includes a bearing 67 mounted on the housing 11, a knob 68 is rotatably provided in the middle of the bearing 67, the knob 68 penetrates to the outside of the guide plate 111 and is connected to the surface of the housing 61, and the housing 61 can rotate around the bearing 67 as an axis; The conduit 66 is fixedly installed in the housing 61, and a blocking plate 65 is arranged at the end of the conduit 66, and the blocking plate 65 includes an inner embedded part rotatably arranged in the gas-liquid storage chamber 63 and an outer attached part rotatably arranged outside the gas-liquid storage chamber 63; When the conduit 66 needs to be opened, the knob 68 is rotated so that the knob 68 drives the housing 61 to rotate under the restriction of the bearing 67. The housing 61 drives the conduit 66 to rotate while rotating on the surface of the gas-liquid storage chamber 63. When the conduit 66 rotates, the embedded part of the blocking plate 65 is removed from the surface of the channel 64 and the outer part contacts the channel 64. With the cooperation of the outer part, the gas-liquid mixture in the gas-liquid storage chamber 63 will not overflow from the gas-liquid storage chamber 63 through the channel 64. When the housing 61 drives the conduit 66 to rotate to the specified position, the conduit 66 is correspondingly connected with the channel 64, and the gas-liquid mixture is discharged through the conduit 66. The conduit 66 is opened. When the conduit 66 needs to be closed, the conduit 66 drives the embedded part of the blocking plate 65 to rotate inside the gas-liquid storage chamber 63 and completes the blocking of the channel 64. At this time, the conduit 66 is no longer connected to the corresponding channel 64, and the conduit 66 is closed.

[0025] This device can also perform common spray tests on non-woven fabrics, such as Figure 1 , Figure 2 As shown, a spray head 12 is disposed on the top of the housing 11, and a spray pipe 122 connected to the liquid storage chamber 38 is disposed on the spray head 12, and a regulating valve 121 is installed on the spray pipe 122 to control opening and closing; An arc-shaped guide plate 111 is installed on the housing 11, the bearing 67 is fixed on the guide plate 111 and the knob 68 passes through the guide plate 111. After the housing 61 rotates to close the conduit 66, the outer wall of the housing 61 is level with the surface of the guide plate 111; A drainage channel 131 is provided in the base 13; By closing the conduit 66, the conduit 66 no longer extracts the solution from the liquid storage chamber 38 through the solution pressurizing mechanism 30, and at the same time the housing 61 rotates to a state that is horizontal with the surface of the guide plate 111 to avoid blocking the spraying of the solution, and then the regulating valve 121 is opened, so that the spray head 12 can extract the solution in the liquid storage chamber 38 through the spray pipe 122 and spray it from above the non-woven fabric. The sprayed solution contacts the guide plate 111 after passing through the non-woven fabric, and flows into the drainage channel 131 under the guidance of the guide plate 111, and the waste solution is discharged through the drainage channel 131; When the conduit 66 needs to be used for testing, the regulating valve 121 can be closed.

[0026] The power source of the swing frame 26 is a drive mechanism 40 installed in the housing 11, such as Fig.14 As shown, the driving mechanism 40 includes a power source arranged in the housing 11, the power source is a reduction motor 41, the reduction motor 41 is composed of a DC motor and a reduction device, and the model is a FS47 reduction motor. A driving wheel 42 is sleeved and installed on the output end of the reduction device, and a driven wheel 44 is sleeved and installed in the middle of the first rotating shaft 22. A transmission belt 43 for transmission is sleeved on the surface of the driving wheel 42 and the reduction motor 41. When the reduction motor 41 is started, the driven wheel 44 is driven to rotate through the driving wheel 42 and the transmission belt 43, and the driven wheel 44 drives the first rotating shaft 22 installed on the mounting seat 21 to rotate.

[0027] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes to a medical meltblown nonwoven fabric performance detection device and its inventive concept according to the technology of the present invention, which should be covered within the protection scope of the present invention.

Claims

1. A device for testing the performance of a medical meltblown nonwoven fabric, comprising a testing device (10), wherein the testing device (10) comprises a base (13) placed on a table and a housing (11) arranged on the base (13), a mounting frame (14) being mounted on the housing (11), and a nonwoven fabric being fixed on the mounting frame (14), characterized in that: A transmission mechanism (20) is disposed inside the housing (11), the transmission mechanism (20) comprising a rotating wheel (24) rotatably disposed inside the housing (11) and two swing frames (26) that swing back and forth up and down as the rotating wheel (24) rotates, and a solution pressurizing mechanism (30) and a gas pressurizing mechanism (50) are respectively disposed on the swing frames (26); The solution pressurizing mechanism (30) comprises a liquid pressurizing chamber (34) installed in the housing (11) and a first piston (35) slidably embedded in the liquid pressurizing chamber (34), wherein the first piston (35) moves up and down with the swing of the swing frame (26) to suck in and push the liquid; The gas pressurizing mechanism (50) comprises a gas pressurizing chamber (53) arranged in the housing (11) and a second piston (55) slidably embedded in the gas pressurizing chamber (53), wherein the second piston (55) moves up and down with the swing of the swing frame (26) to inhale and push gas; Two spraying mechanisms (60) are mounted on the shell (11), and the spraying mechanism (60) comprises a shell (61) disposed at the upper and lower sides of the non-woven fabric and a conduit (66) disposed on the shell (61); the liquid in the liquid pressurizing chamber (34) and the gas in the gas chamber (51) are mixed and enter the shell (61); the gas is accelerated by the pressure to form turbulence and entrains the liquid to be sprayed onto the non-woven fabric through the conduit (66); The power source of the swing frame (26) is a driving mechanism (40) installed in the housing (11).

2. A medical meltblown nonwoven fabric performance testing device according to claim 1, characterized in that: The transmission mechanism (20) further comprises a mounting seat (21) mounted in the housing (11), and a first rotating shaft (22) and a second rotating shaft (23) are rotatably disposed on the mounting seat (21); The rotating wheel (24) is rotatably arranged on the first rotating shaft (22), and a third rotating shaft (25) is arranged on the rotating wheel (24); The swing frame (26) is rotatably arranged on the second rotating shaft (23), and a limiting groove (27) is provided on the swing frame (26), a limiting block (28) is slidably embedded in the limiting groove (27), and a middle portion of the limiting block (28) is rotatably connected to the third rotating shaft (25); The swing frame (26) is provided with a guide groove (29), a guide block (210) is slidably embedded in the guide groove (29), a connecting rod (211) is rotatably provided in the middle of the guide block (210), and the end of the connecting rod (211) is connected to the solution pressurizing mechanism (30).

3. A medical meltblown nonwoven fabric performance testing device according to claim 2, characterized in that: The rotating wheel (24) is provided with a slide groove (241), and threaded rods (242) are rotatably provided at both ends of the slide groove (241), and a twisting knob (243) is connected to one side of the threaded rod (242) close to the outer edge of the rotating wheel (24), and the twisting knob (243) passes through the slide groove (241) and the rotating wheel (24); A slider (244) is slidably embedded in the slide groove (241), and a thread is provided in the middle of the slider (244). The threaded rod (242) passes through the middle of the slider (244) and meshes with the slider (244). A third rotating shaft (25) is mounted on the slider (244). When the slider (244) moves, the distance between the first rotating shaft (22) and the third rotating shaft (25) is changed.

4. A medical meltblown nonwoven fabric performance testing device according to claim 2, characterized in that: The solution pressurizing mechanism (30) further comprises a liquid storage chamber (38) installed in the housing (11); the liquid storage chamber (38) is connected to a water inlet pipe (31); a one-way valve (32) is installed at the end of the water inlet pipe (31); the other end of the one-way valve (32) is connected to a connecting pipe (33); and the liquid pressurizing chamber (34) is installed on the connecting pipe (33); A first push rod (36) is installed at the bottom of the first piston (35), and the first push rod (36) passes through the bottom of the liquid pressurizing chamber (34) and is connected to the connecting rod (211); A flow guide pipe (37) is installed on the connecting pipe (33), and the flow guide pipe (37) is connected to the spraying mechanism (60).

5. A medical meltblown nonwoven fabric performance testing device according to claim 4, characterized in that: The gas pressurizing mechanism (50) further comprises an air chamber (51) installed in the housing (11), the gas pressurizing chamber (53) being installed in the air chamber (51), the top of the second piston (55) being connected to a second push rod (56) penetrating the top of the air chamber (51), and a hinge shaft (57) being hingedly installed at the end of the second push rod (56), and the hinge shaft (57) being fixedly installed on the swing frame (26); Both ends of the gas pressurizing chamber (53) are respectively connected to an air inlet pipe (52) penetrating to the outside of the shell (11) and an air outlet pipe (54) communicating with the flow guide pipe (37).

6. A medical meltblown nonwoven fabric performance testing device according to claim 5, characterized in that: The spraying mechanism (60) further comprises a mixing channel (62) connected to the flow guide pipe (37), the gas and liquid in the flow guide pipe (37) and the gas outlet pipe (54) are collected through the mixing channel (62), the end of the mixing channel (62) is connected to a gas-liquid storage chamber (63), and a channel (64) is provided on the surface of the gas-liquid storage chamber (63), and the conduit (66) is installed at the channel (64).

7. A medical meltblown nonwoven fabric performance testing device according to claim 6, characterized in that: The conduit (66) is provided with a thinning sheet (661) on its surface, and a plurality of thinning channels (662) are provided on the surface of the thinning sheet (661) and are arranged in an inwardly concave shape, so that the liquid inlet end of the thinning channel (662) is expanded and the liquid outlet end is contracted, and after the gas-liquid mixture enters the conduit (66), it is blocked and stored in energy through the thinning channel (662); After the conduit (66) has completed energy storage, the thinning sheet (661) is squeezed and deformed to bulge, the liquid inlet end of the thinning channel (662) contracts, and the liquid outlet end expands, and the gas-liquid mixture forms an aerosol and is discharged through the thinning channel (662).

8. A medical meltblown nonwoven fabric performance testing device according to claim 6, characterized in that: The spraying mechanism (60) further comprises a bearing (67) mounted on the housing (11); a knob (68) is rotatably provided in the middle of the bearing (67); the knob (68) penetrates the outside of the guide plate (111) and is connected to the surface of the housing (61); and the housing (61) is rotatable about the bearing (67) as an axis. The conduit (66) is fixedly installed in the housing (61), and a blocking plate (65) is arranged at the end of the conduit (66), the blocking plate (65) comprising an inner embedded portion rotatably arranged in the gas-liquid storage chamber (63) and an outer attached portion rotatably arranged outside the gas-liquid storage chamber (63), and the conduit (66) is closed when the inner embedded portion of the blocking plate (65) rotates to the channel (64); When the conduit (66) is opened, the inner embedded portion of the blocking plate (65) is removed from the channel (64), and the outer attached portion always adheres to the channel (64) during rotation.

9. A medical meltblown nonwoven fabric performance testing device according to claim 8, characterized in that: A spray head (12) is arranged on the top of the housing (11); a spray pipe (122) connected to the liquid storage chamber (38) is arranged on the spray head (12); a regulating valve (121) is installed on the spray pipe (122) to control opening and closing; An arc-shaped guide plate (111) is mounted on the housing (11), a bearing (67) is fixed on the guide plate (111), and a knob (68) passes through the guide plate (111); after the housing (61) rotates to close the conduit (66), the outer wall of the housing (61) is level with the surface of the guide plate (111).

10. A medical meltblown nonwoven fabric performance testing device according to claim 1, characterized in that: The driving mechanism (40) comprises a power source disposed in a housing (11); a driving wheel (42) is sleeved on the output end of the power source; a driven wheel (44) is sleeved on the middle of the first rotating shaft (22); and a transmission belt (43) for transmission is sleeved on the surfaces of the driving wheel (42) and the reduction motor (41).

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