Sampling device for detecting hydroscopicity of fiber material

Abstract

The invention discloses a sampling device for fiber material hydroscopicity detection, the sampling device comprises a sampling cylinder, the sampling cylinder is internally provided with a sampling assembly, and the sampling assembly comprises a piston plate. When the improved sampling device is used, a fiber material is cut in a closed inner space in the opening in the bottom end of the sampling barrel to complete the cutting operation of the fiber material, and after a fiber material sample is cut off, the fiber material sample is directly sucked into the closed space in the opening in the bottom end of the sampling barrel to be stored; after a fiber material sample is placed in the drying device or the moisture absorption device, the fiber material sample can be automatically pushed out of the sampling barrel and is supported on the top side of the sampling barrel in the air without other operations of an operator, so that the fiber material sample can be exposed to the outside for a long time, and the sampling efficiency is improved. The contact between the fiber material sample and an external object is greatly avoided, and the probability that the fiber material sample is polluted is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of sampling devices, and more particularly to a sampling device for detecting the water absorption of fiber materials. Background Technology

[0002] Fiber materials generally refer to three main categories: natural fibers, inorganic fibers, and synthetic fibers. Various fiber materials are generally used to make various fabrics or paper as raw materials. After existing fiber materials are produced into fabrics or paper, a certain amount of sample is usually taken from the fabric or paper to test the water absorption performance of the fiber materials. The water absorption test of fiber materials aims to evaluate their ability to absorb and retain moisture, which is of great significance for understanding the performance, application, and durability of materials.

[0003] Existing sampling devices typically involve the operator using a cutting device to remove portions of fiber material from various locations on the fabric. The operator then repeatedly moves the fiber material sample by hand or with a clamping tool, placing it in a drying or desiccant device to complete the test of the fiber material sample's water absorption using an oven method. This prolonged exposure of the sample to the external environment increases the probability of contamination. Summary of the Invention

[0004] The purpose of this invention is to provide a sampling device for detecting the water absorption of fiber materials, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sampling device for detecting the water absorption of fiber materials, comprising a sampling cylinder, wherein a sampling assembly is provided inside the sampling cylinder, the sampling assembly comprising a piston plate, the piston plate mainly consisting of a cutter and a pressure plate, wherein the outer peripheral wall of the cutter is in contact with the inner wall of the sampling cylinder, the top of the pressure plate is inserted into the inner hole of the cutter and contacts the inner hole wall of the cutter, a threaded rod is fixedly mounted on the top side of the cutter by a connecting rod and bolts, a threaded tube is threadedly sleeved on the outer peripheral side of the top of the threaded rod, a pad is provided on the bottom side of the sampling cylinder, the pressure plate and the cutter are connected by a connecting mechanism, a driving mechanism is provided in the opening at the top of the sampling cylinder, and a limiting mechanism is provided on the outer peripheral side of the threaded tube; The cutter and the pressure plate are equipped with a support assembly, which includes an airbag. The top of the cutter has several storage slots arranged in a circular array. The airbag is located in the corresponding storage slot, and the bottom end of the airbag extends out of the cutter and is fixedly connected to the cutter. The outer peripheral wall of the airbag is clearance-fitted with the inner wall of the corresponding storage slot, and the top end of the airbag is fixedly connected to the inner wall of the corresponding storage slot. The bottom side of the airbag is equipped with a one-way valve, and the exhaust end of the one-way valve is fixedly inserted into the bottom opening of the corresponding airbag. The pressure plate is equipped with a pushing mechanism, and the pushing mechanism is connected to the airbag through an air guiding mechanism.

[0006] Preferably, the cutter is ring-shaped, the inner ring edge at the bottom of the cutter is beveled, the top cross-section of the cutter is L-shaped, and the bottom side of the pressure plate is frustum-shaped.

[0007] Preferably, the connecting mechanism includes a limiting ring, which is fixedly sleeved at the middle position of the outer periphery of the pressure plate. An annular groove is formed on the inner ring wall of the cutter at the position corresponding to the limiting ring, and the limiting ring is located in the annular groove. A push ring is fixedly sleeved on the outer periphery of the limiting ring, and at the junction of the outer periphery of the push ring and the inner wall of the annular groove, a plurality of first springs are arranged in a circular array between the top side of the push ring and the inner wall of the annular groove, and both ends of each first spring are fixedly connected to the push ring and the inner wall of the annular groove, respectively.

[0008] Preferably, the driving mechanism includes a transmission gear, a motor is fixedly mounted on the inner wall of the top opening of the sampling tube via a connecting block, a main gear is fixedly mounted on the driving end of the motor, the transmission gear is fixedly sleeved at the middle position of the outer periphery of the threaded rod, and the transmission gear is meshed with the main gear, and the transmission gear is located on the bottom side of the threaded tube.

[0009] Preferably, the limiting mechanism includes a collar, which is rotatably sleeved on the outer periphery of the threaded tube via a bearing. The outer periphery of the threaded tube has a plurality of positioning grooves arranged in a circular array. The inner ring wall of the collar has an air storage groove at the position corresponding to the positioning groove. A piston push rod is slidably installed in the air storage groove. A ball is rotatably installed in the piston push rod, and the end of the ball near the corresponding positioning groove is inserted into the corresponding positioning groove and contacts the inner wall of the corresponding positioning groove.

[0010] Preferably, the collar is fixedly connected to the inner wall of the top opening of the sampling cylinder by a plurality of connecting plates, and the top side of the collar and the top side of the threaded tube are both coplanar with the top side of the sampling cylinder.

[0011] Preferably, the pushing mechanism includes a plurality of piston rods, and the bottom side of the pressure plate is provided with a plurality of guide grooves in a circumferential array. The piston rods are disposed in the corresponding guide grooves, and the outer peripheral wall of the piston rods is in contact with the inner wall of the corresponding guide groove.

[0012] Preferably, a second spring is wound around the outer periphery of the piston rod, and the two ends of the second spring are fixedly connected to the inner wall of the corresponding piston rod and the corresponding guide groove, respectively.

[0013] Preferably, the air guiding mechanism includes a flow divider groove in the shape of an annular groove. The flow divider groove is opened on the inner annular wall of the cutter and is located below the annular groove. The interior of the top opening of the airbag is connected to the interior of the flow divider groove through a first connecting hole. A second connecting hole is opened on the outer peripheral wall of the pressure plate at the position corresponding to the first connecting hole, and the interior of the bottom opening of the second connecting hole is connected to the interior of the corresponding guide groove.

[0014] Preferably, two sealing rings are fixedly installed inside the annular wall of the cutter at the position corresponding to the diversion groove, and the inner ring wall of each sealing ring is in contact with the outer peripheral wall of the pressure plate. The two sealing rings are arranged opposite each other on the upper and lower sides of the diversion groove, and the upper sealing ring is located between the diversion groove and the annular groove.

[0015] The present invention has at least the following beneficial effects: 1. When using this improved sampling device, the drive device drives the threaded rod to rotate. Due to the constraint and limitation of the threaded rod by the limiting mechanism, the threaded rod rotating inside the threaded tube drives the cutter to rotate and pushes the cutter downward simultaneously. First, the pressure plate will contact the fiber material. At this time, due to the clamping and limitation of the pressure plate and the pad on part of the fiber material, the fiber material at the corresponding position is stably kept in a straight state. Then the cutter continues to move down and contact the fiber material. The limiting mechanism automatically releases the constraint and limitation state of the threaded rod, and the threaded rod rotates freely. The rotating cutter can automatically cut a fiber material sample of a specific shape from the fiber material, thereby avoiding the pulling of the fiber material sample inside the cutter during the rotation of the cutter, which would cause damage to the fiber material sample. 2. After the fiber material sample is cut, the drive mechanism drives the threaded rod to rotate in the opposite direction, pulling the piston plate into the sampling tube. This creates a negative pressure chamber in the bottom opening of the sampling tube, which adsorbs and fixes the pad onto the bottom opening of the sampling tube. Ultimately, the fiber material sample is placed in a relatively closed negative pressure chamber in the bottom opening of the sampling tube, thus preventing the fiber material sample from moving or being in contact with the outside air for a long time.

[0016] 3. After the fiber material sample is stored in the sampling tube, the operator can move the sample into the drying device or the dehumidifying device by moving the sampling tube. The sampling tube is then inverted, and the drive device pushes the piston plate outward through the threaded rod, releasing the negative pressure chamber in the bottom opening of the sampling tube. At this time, most of the gas in the airbag flows into the pushing mechanism through the air guiding mechanism, which starts the pushing mechanism. Finally, the fiber material sample is supported by multiple points on the bottom side, thus separating the fiber material sample from the pressure plate. The operator then removes the pad from the fiber material sample. At this time, the fiber material sample is placed relatively stably on the top side of the sampling tube, and the fiber material sample can fully contact the air in the drying device or the dehumidifying device, which facilitates the drying or dehumidifying operation of the fiber material sample.

[0017] 4. When using this improved sampling device, the fiber material is cut into a closed space inside the bottom opening of the sampling tube. After the fiber material sample is cut, it is directly sucked into the closed space inside the bottom opening of the sampling tube for storage. After the fiber material sample is placed in the drying device or the dehumidifying device, it can be automatically pushed out of the sampling tube and supported on the top side of the sampling tube without the need for other operations by the operator. This allows the fiber material sample to be exposed to the outside environment for a long time and greatly avoids contact between the fiber material sample and foreign objects, reducing the probability of the fiber material sample being contaminated. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall invention; Figure 2 This is a schematic diagram of the internal structure of the sampling tube of the present invention; Figure 3 This is a front view of the internal structure of the sampling tube of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of the structure at point A in the middle; Figure 5 For the present invention Figure 3 Enlarged view of the structure at point B; Figure 6 This is a schematic diagram of the overall structure of the piston plate and motor of the present invention; Figure 7This is a bottom view of the transmission gear and gear of the present invention; Figure 8 This is a schematic diagram of the internal structure of the threaded tube and collar of the present invention; Figure 9 This is a schematic diagram of the internal structure of the cutter of the present invention; Figure 10 For the present invention Figure 9 Enlarged view of the structure at point C; Figure 11 This is a schematic diagram of the internal structure of the pressure plate of the present invention; Figure 12 For the present invention Figure 11 Enlarged view of the structure at point D.

[0020] In the diagram: 1. Sampling cylinder; 2. Sampling assembly; 21. Piston plate; 211. Cutter; 212. Pressure plate; 22. Threaded rod; 23. Pad; 24. Connecting mechanism; 241. Limiting ring; 242. Annular groove; 243. Push ring; 244. First spring; 25. Drive mechanism; 251. Motor; 252. Main gear; 253. Transmission gear; 26. Limiting mechanism; 261. Collar; 262. Positioning groove; 263. Gas storage tank; 264. Piston push rod; 265. Ball bearing; 27. Threaded tube; 3. Support assembly; 31. Storage tank; 32. Airbag; 33. One-way valve; 34. Pushing mechanism; 341. Guide groove; 342. Piston rod; 343. Second spring; 35. Air guiding mechanism; 351. Diverting groove; 352. First connecting hole; 353. Second connecting hole; 354. Sealing ring. Detailed Implementation

[0021] To make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0022] This invention provides a technical solution: (Refer to...) Figure 1 - Figure 12This invention discloses a sampling device for testing the water absorption of fiber materials, including a sampling cylinder 1. The sampling cylinder 1 is provided with a sampling component 2. The sampling component 2 includes a piston plate 21, which is mainly composed of a cutter 211 and a pressure plate 212. The outer peripheral wall of the cutter 211 is in contact with the inner wall of the sampling cylinder 1. The top of the pressure plate 212 is inserted into the inner hole of the cutter 211 and contacts the inner hole wall of the cutter 211. A threaded rod 22 is fixedly installed on the top side of the cutter 211 by a connecting rod and bolts. A threaded tube 27 is threaded on the outer peripheral side of the top of the threaded rod 22. A pad 23 is provided on the bottom side of the sampling cylinder 1. The pressure plate 212 and the cutter 211 are connected by a connecting mechanism 24. A driving mechanism 25 is provided in the opening at the top of the sampling cylinder 1. A limiting mechanism 26 is provided on the outer peripheral side of the threaded tube 27. A support assembly 3 is provided inside the cutter 211 and the pressure plate 212. The support assembly 3 includes an airbag 32. Several storage slots 31 are arranged in a circular array on the top of the cutter 211. The airbag 32 is located in the corresponding storage slot 31, and the bottom end of the airbag 32 extends to the outside of the cutter 211 and is fixedly connected to the cutter 211. The outer peripheral wall of the airbag 32 is clearance-fitted with the inner wall of the corresponding storage slot 31, and the top end of the airbag 32 is fixedly connected to the inner wall of the corresponding storage slot 31. A one-way valve 33 is provided on the bottom side of the airbag 32, and the exhaust end of the one-way valve 33 is fixedly inserted into the bottom opening of the corresponding airbag 32. A pushing mechanism 34 is provided inside the pressure plate 212, and the pushing mechanism 34 is connected to the airbag 32 through an air guiding mechanism 35.

[0023] In this embodiment, when using the improved sampling device, the operator first pushes the pad 23 away from the bottom side of the sampling cylinder 1, then places the pad 23 on the bottom side of the fiber material. Then, the operator holds the sampling cylinder 1 moving device and moves the sampling cylinder 1 above the pad 23, so that the sampling cylinder 1 and the pad 23 are clamped at the sampling position of the fiber material. Then, the operator drives the threaded rod 22 to rotate through the driving device. Due to the constraint and limitation of the threaded rod 22 by the limiting mechanism 26, the threaded rod 22 rotating inside the threaded tube 27 drives the cutter 211 to rotate and pushes the cutter 211 downward at the same time. First, the pressure plate 212 will come into contact with the fiber material. At this time, due to the clamping and limitation of the pressure plate 212 and the pad 23 on part of the fiber material, the fiber material at the corresponding position is stably kept in a straight state. After the pressure plate 212 is pressed onto the fiber material, due to the mutual contact between the pad 23 and the fiber material, and the mutual contact between the pressure plate 212 and the fiber material, the pressure plate 212 will not continue to move downward, while the cutter 211 continues to move downward. At the same time, the connecting mechanism 24 can simultaneously apply a pushing force to the pressure plate 212 to maintain the stable pressing and limiting of the pressure plate 212 on the fiber material. As the cutter 211 moves downward, it comes into contact with the fiber material and cannot move further. Then, the limiting mechanism 26 automatically releases the constraint of the threaded rod 22, and the threaded tube 27 rotates freely inside the collar 261. The blade of the cutter 211 rotates in contact with the fiber material, cutting the fiber material sample of a specific shape from the fiber material. Due to the clamping and limiting of the fiber material sample by the pad 23 and the pressure plate 212, the fiber material sample can be kept in a stable and straight state, thereby avoiding the pulling of the fiber material sample inside the cutter 211 when the cutter 211 rotates, which would cause damage to the fiber material sample. When the piston plate 21 moves downward, the bottom opening of the sampling tube 1 is almost closed due to the compression of the fiber material by the sealing plate and the bottom opening of the sampling tube 1. At this time, due to the downward movement of the piston plate 21, the gas in the bottom opening of the sampling tube 1 passes through the gap between the cutter 211 and the inner wall of the bottom opening of the sampling tube 1 and flows into the air bag 32 through the one-way valve 33, causing the air bag 32 to expand. After the fiber material sample is cut, the drive mechanism 25 drives the cutter 211 to retract a specific distance, thereby forming a negative pressure chamber in the bottom opening of the sampling tube 1, adsorbing and fixing the pad 23 on the bottom opening of the sampling tube 1, and finally placing the fiber material sample in a relatively closed negative pressure chamber in the bottom opening of the sampling tube 1, while avoiding contact between the fiber material sample and the outside air. At this time, the operator can move the fiber material sample into the drying device or the dehumidification device by moving the sampling tube 1. When the sampling tube 1 is placed in the drying device or the dehumidifying device, the sampling tube 1 needs to be placed upside down. Then, the driving mechanism 25 pushes part of the pressure plate 212 out of the sampling tube 1. At this time, the negative pressure intensity in the bottom opening of the sampling tube 1 decreases, which causes the adsorption force on the pad 23 to gradually decrease. Then, the connecting mechanism 24 pushes the cutter 211 and the pressure plate 212 to move and reset. At this time, most of the gas in the airbag 32 flows into the pushing mechanism 34 through the air guiding mechanism 35, which makes the pushing mechanism 34 start. Finally, the fiber material sample is supported by multiple positions on the bottom side of the fiber material sample, which separates the fiber material sample from the pressure plate 212. Then, the operator removes the pad 23 from the fiber material sample. At this time, the fiber material sample is placed relatively stably in the air above the top side of the sampling tube 1. The fiber material sample can fully contact the air in the drying device or the dehumidifying device, which facilitates the drying or dehumidifying operation of the fiber material sample. It should be noted that a power supply can be installed in the top opening of the sampling tube 1 to provide energy for the drive of the motor 251.

[0024] In a further preferred embodiment of the invention, such as Figure 3 , Figure 9 and Figure 11As shown, the cutter 211 is ring-shaped, the inner ring edge at the bottom of the cutter 211 is beveled, and the cross-sectional shape of the top of the cutter 211 is L-shaped. The bottom side of the pressure plate 212 is frustum-shaped. In this embodiment, when the cutter 211 comes into contact with the fiber material, the inclined surface of the bottom opening of the cutter 211 comes into contact with the inclined surface of the bottom of the pressure plate 212. At this time, the pressure plate 212 can clamp and limit almost all the fiber material in the cutter 211, so as to enhance the clamping and limiting effect of the pressure plate 212 on the fiber material sample.

[0025] In a further preferred embodiment of the invention, such as Figure 3 , Figure 5 , Figure 11 and Figure 12 As shown, the connecting mechanism 24 includes a limiting ring 241, which is fixedly sleeved at the middle position of the outer periphery of the pressure plate 212. An annular groove 242 is provided on the inner ring wall of the cutter 211 at the position corresponding to the limiting ring 241, and the limiting ring 241 is located in the annular groove 242. A push ring 243 is fixedly sleeved on the outer periphery of the limiting ring 241, and the outer periphery of the push ring 243 is in contact with the inner wall of the annular groove 242. A plurality of first springs 244 are arranged in a circular array between the top side of the push ring 243 and the inner wall of the annular groove 242, and both ends of each first spring 244 are fixedly connected to the push ring 243 and the inner wall of the annular groove 242, respectively. In this embodiment, after the pressure plate 212 is pressed onto the fiber material, due to the mutual contact between the pad 23 and the fiber material, and the mutual contact between the pressure plate 212 and the fiber material, the pressure plate 212 will not continue to move downward. At this time, due to the rotation of the limiting ring 241 and the push ring 243 and the sliding of the push ring 243 in the annular groove 242, the cutter 211 can continue to move downward. The downward movement of the cutter 211 can cooperate with the push ring 243 to compress the first spring 244. A pressure is applied to the pressure plate 212 from multiple positions to maintain the stable pressing and limiting of the pressure plate 212 on the fiber material.

[0026] In a further preferred embodiment of the invention, such as Figure 1 , Figure 6 and Figure 7 As shown, the drive mechanism 25 includes a transmission gear 253. A motor 251 is fixedly mounted on the inner wall of the top opening of the sampling tube 1 via a connecting block. A main gear 252 is fixedly mounted on the drive end of the motor 251. The transmission gear 253 is fixedly sleeved at the middle position of the outer periphery of the threaded rod 22, and the transmission gear 253 is meshed with the main gear 252. The transmission gear 253 is located on the bottom side of the threaded tube 27. In this embodiment, after the fiber material is placed between the pad 23 and the sampling cylinder 1, the operator starts the motor 251 to drive the main gear 252 to rotate, and then drives the threaded rod 22 to rotate at a constant speed through the transmission gear 253. The threaded rod 22 is driven to rotate through the meshing of the smaller diameter main gear 252 and the larger diameter transmission gear 253, thereby enhancing the driving force of the motor 251 on the threaded rod 22. It should be noted that the diameter of the main gear 252 is smaller than the diameter of the transmission gear 253.

[0027] In a further preferred embodiment of the invention, such as Figure 1 and Figure 8 As shown, the limiting mechanism 26 includes a collar 261, which is rotatably sleeved on the outer periphery of the threaded tube 27 via a bearing. The outer periphery of the threaded tube 27 has a plurality of positioning grooves 262 arranged in a circular array. The inner ring wall of the collar 261 has an air storage groove 263 at the position corresponding to the positioning groove 262. A piston push rod 264 is slidably installed in the air storage groove 263. A ball 265 is rotatably installed in the piston push rod 264, and one end of the ball 265 close to the corresponding positioning groove 262 is inserted into the corresponding positioning groove 262 and contacts the inner wall of the corresponding positioning groove 262. In this embodiment, when the motor 251 drives the threaded rod 22 to rotate, the threaded tube 27 will not rotate with the threaded rod 22 due to the mutual contact between the ball 265 and the inner wall of the positioning groove 262. At this time, the threaded rod 22 rotating inside the threaded tube 27 drives the cutter 211 to rotate and pushes the cutter 211 downward in sync. After the cutter 211 comes into contact with the fiber material, it cannot move downwards. At this time, due to the push of the motor 251 on the threaded rod 22 and the friction between the threaded rod 22 and the threaded cylinder, a large contact force is generated between the outer arc wall of the ball 265 and the inner arc wall of the positioning groove 262. This forces the ball 265 to be squeezed out of the positioning groove 262 along the outer arc wall of the ball 265, automatically releasing the constraint and limiting state between the collar 261 and the threaded tube 27. Then, with the drive of the motor 251 on the threaded rod 22, the threaded tube 27 rotates freely in the collar 261. At this time, the blade of the cutter 211 rotates in contact with the fiber material, cutting the fiber material sample of a specific shape from the fiber material. No other operation is required from the operator. The device has a high degree of automation and is convenient to use.

[0028] In a further preferred embodiment of the invention, such as Figure 1 and Figure 3 As shown, the collar 261 is fixedly connected to the inner wall of the top opening of the sampling cylinder 1 through several connecting plates, and the top side of the collar 261 and the top side of the threaded tube 27 are both coplanar with the top side of the sampling cylinder 1. In this embodiment, during the process of the piston plate 21 moving up or down, outside air can flow into the sampling tube 1 through the gap between the connecting plates and between the outer peripheral wall of the collar 261 and the inner wall of the top opening of the sampling tube 1, or the air in the top opening of the sampling tube 1 can be discharged from the top opening of the sampling tube 1, so as to avoid the occurrence of a negative pressure high-pressure chamber in the top opening of the sampling tube 1, which would affect the movement of the piston plate 21 in the sampling tube 1.

[0029] In a further preferred embodiment of the invention, such as Figure 3 , Figure 5 , Figure 11 and Figure 12 As shown, the pushing mechanism 34 includes several piston rods 342. The bottom side of the pressure plate 212 is provided with several guide grooves 341 in a circumferential array. The piston rods 342 are located in the corresponding guide grooves 341, and the outer peripheral wall of the piston rods 342 is connected to the inner wall of the corresponding guide grooves 341. In this embodiment, most of the gas in the airbag 32 flows directly into the guide groove 341 through the gas guiding mechanism 35, which greatly increases the pressure in the guide groove 341. This pushes out part of the piston rod 342 from the guide groove 341. The piston rod 342 extending from the guide groove 341 supports the fiber material sample at multiple positions on the bottom side of the fiber material sample, thereby separating the fiber material sample from the pressure plate 212. No other operation is required from the operator. The device has a high degree of automation and is convenient to use.

[0030] In a further preferred embodiment of the invention, such as Figure 12 As shown, a second spring 343 is wound around the outer periphery of the piston rod 342, and the two ends of the second spring 343 are fixedly connected to the inner wall of the corresponding piston rod 342 and the corresponding guide groove 341, respectively. In this embodiment, after the above-mentioned device is used, the operator manually presses the pressure plate 212 so that the second connecting hole 353 is aligned with the annular groove 242. At this time, due to the push of the piston rod 342 by the second spring 343, the gas in the guide groove 341 passes through the annular groove 242 and the gap between the push plate and the inner wall of the cutter 211 and is discharged. Then, the pressure plate 212 is released, and the gas in the airbag 32 flows back into the second connecting hole 353 or the guide groove 341 through the first connecting hole 352 and the diversion groove 351. According to the above repeated operation, the reciprocating movement of the pressure plate 212 finally makes the excess gas in the airbag 32 discharged, which facilitates the discharge of gas in the airbag 32.

[0031] In a further preferred embodiment of the invention, such as Figure 3 , Figure 4 , Figure 5 , Figure 9 , Figure 10 , Figure 11 and Figure 12As shown, the air guiding mechanism 35 includes a flow divider 351 arranged in an annular shape. The flow divider 351 is opened on the inner annular wall of the cutter 211 and is located below the annular groove 242. The interior of the top opening of the airbag 32 is connected to the interior of the flow divider 351 through the first connecting hole 352. A second connecting hole 353 is opened on the outer peripheral wall of the pressure plate 212 at the position corresponding to the first connecting hole 352, and the interior of the bottom opening of the second connecting hole 353 is connected to the interior of the corresponding guide groove 341. In this embodiment, when the pressure plate 212 is pushed out of the sampling tube 1, the negative pressure intensity in the bottom opening of the sampling tube 1 gradually decreases as the cutter 211 moves, thereby causing the suction force of the sampling tube 1 on the pad 23 to gradually decrease. When the suction force of the negative pressure chamber in the sampling tube 1 on the pad 23 is less than the pushing force of the first spring 244 on the push ring 243, the pressure plate 212 retracted into the cutter 211 is pushed out of the cutter 211 again, and pushes the pad 23 to separate from the sampling tube 1, automatically releasing the closed state of the bottom opening of the sampling tube 1. At the same time, the second connecting hole 353 is re-aligned with the diversion groove 351. Due to the contraction and deformation of the air bag 32, the gas in the air bag 32 flows into the guide groove 341 through the first connecting hole 352, the diversion groove 351 and the second connecting hole 353. No other operation is required from the operator. The device has a high degree of automation and is convenient to use.

[0032] In a further preferred embodiment of the invention, such as Figure 3 , Figure 5 , Figure 9 and Figure 10 As shown, two sealing rings 354 are fixedly installed in the inner wall of the cutter 211 at the position corresponding to the diversion groove 351, and the inner ring wall of each sealing ring 354 is in contact with the outer peripheral wall of the pressure plate 212. The two sealing rings 354 are arranged opposite to each other on the upper and lower sides of the diversion groove 351, and the upper sealing ring 354 is located between the diversion groove 351 and the annular groove 242. In this embodiment, when the cutter 211 slides on the outer periphery of the pressure plate 212, the second connecting hole 353 and the diversion groove 351 are misaligned. At this time, due to the obstruction of the sealing ring 354, the communication between the diversion groove 351 and the second connecting hole 353 can be directly cut off. As a result, when the piston plate 21 moves down, due to the compression of the fiber material by the sealing plate and the bottom opening of the sampling tube 1, the bottom opening of the sampling tube 1 is in a nearly closed state. At this time, due to the downward movement of the cutter 211, the gas in the bottom opening of the sampling tube 1 passes through the gap between the cutter 211 and the inner wall of the bottom opening of the sampling tube 1 and flows into the air bag 32 through the one-way valve 33, causing the air bag 32 to expand, thereby reducing the amount of gas in the bottom opening of the sampling tube 1 and thus avoiding the formation of a high-pressure chamber in the bottom opening of the sampling tube 1 that affects the movement of the cutter 211.

[0033] Working principle: When using this improved sampling device, the operator first pushes the pad 23 away from the bottom of the sampling cylinder 1, then places the pad 23 on the bottom of the fiber material. The operator then holds the sampling cylinder 1 moving device and moves the sampling cylinder 1 above the pad 23, so that the sampling cylinder 1 and the pad 23 are clamped at the sampling position of the fiber material. Then the operator starts the motor 251 to drive the main gear 252 to rotate, and then drives the threaded rod 22 to rotate at a constant speed through the transmission gear 253. At this time, due to the mutual abutment between the ball 265 and the inner wall of the positioning groove 262, the threaded tube 27 will not rotate with the threaded rod 22. At this time, the threaded rod 22 rotating inside the threaded tube 27 drives the cutter 211 to rotate and pushes the cutter 211 downward simultaneously. First, the pressure plate 212 will come into contact with the fiber material. At this time, due to the clamping and limiting of the fiber material by the pressure plate 212 and the pad 23, the fiber material at the corresponding position is stably kept in a straight state. After the pressure plate 212 is pressed onto the fiber material, due to the mutual contact between the pad 23 and the fiber material, and the mutual contact between the pressure plate 212 and the fiber material, the pressure plate 212 will not continue to move downward. At this time, due to the rotation of the limiting ring 241 and the push ring 243 and the sliding of the push ring 243 in the annular groove 242, the cutter 211 can continue to move downward. The downward movement of the cutter 211 can cooperate with the push ring 243 to compress the first spring 244. A pressure is applied to the pressure plate 212 from multiple positions to maintain the stable pressing and limiting of the pressure plate 212 on the fiber material. As the cutter 211 moves downward, it comes into contact with the fiber material and cannot move further. At this point, due to the push of the motor 251 on the threaded rod 22 and the friction between the threaded rod 22 and the threaded cylinder, a large contact force is generated between the outer arc wall of the ball 265 and the inner arc wall of the positioning groove 262. This forces the ball 265 to be squeezed out of the positioning groove 262 along the outer arc wall of the ball 265, automatically releasing the constraint between the collar 261 and the threaded tube 27. Then, as the motor 251 drives the threaded rod 22, the threaded tube 27 rotates freely inside the collar 261. At this point, the blade of the cutter 211 rotates in contact with the fiber material, cutting off the fiber material sample of a specific shape from the fiber material. It should be noted that when the cutter 211 comes into contact with the fiber material, the inclined surface of the bottom opening of the cutter 211 contacts the inclined surface of the bottom of the pressure plate 212. At this time, the pressure plate 212 can clamp and limit almost all the fiber material in the cutter 211, so as to avoid the fiber material sample being damaged by the pulling of the cutter 211 when the cutter 211 rotates. As the pressure plate 212 and the fiber material come into contact with each other, and the cutter 211 continues to move downward, the second connecting hole 353 and the diversion groove 351 are misaligned as the cutter 211 slides downward. Furthermore, due to the obstruction of the sealing ring 354, the communication between the diversion groove 351 and the second connecting hole 353 is broken. When the piston plate 21 moves down, the bottom opening of the sampling tube 1 is almost closed due to the compression of the fiber material by the sealing plate and the bottom opening of the sampling tube 1. At this time, due to the downward movement of the piston plate 21, the gas in the bottom opening of the sampling tube 1 passes through the gap between the cutter 211 and the inner wall of the bottom opening of the sampling tube 1 and flows into the air bag 32 through the one-way valve 33, causing the air bag 32 to expand. After the fiber material sample is cut, the operator presses and limits the sampling tube 1 and the pad 23 with the thumb and middle finger. Then, the operator's other hand pulls the fiber material out from between the pad 23 and the sampling tube by pulling the fiber material. The expansion and contraction of the fiber material expands the pores on the fiber material, such as in fabric, or the slight tearing of the fiber material expands the pores on the fiber material, such as in fabric or paper. After the fiber material between the pad 23 and the sampling cylinder 1 is pulled out, the motor 251 drives the main gear 252 to rotate in the opposite direction, which in turn pulls the cutter 211 upward through the threaded rod 22. As the piston plate 21 moves upward, the internal space of the bottom opening of the sampling cylinder 1 expands, thereby forming a negative pressure chamber in the bottom opening of the sampling cylinder 1. This causes the pad 23 to be adsorbed and fixed on the bottom opening of the sampling cylinder 1, sealing the bottom opening of the sampling cylinder 1. This allows the fiber material sample to be placed in a relatively closed negative pressure chamber in the bottom opening of the sampling cylinder 1. At this time, the operator can move the fiber material sample into the drying device or the dehumidification device by moving the sampling cylinder 1. It should be noted that when the cutter 211 moves upward, the second connecting hole 353 should be located on the top side of the top sealing ring 354, and when a negative pressure cavity is formed in the bottom opening of the sampling tube 1, the suction force of the negative pressure cavity on the pad 23 will counteract the suction force of the first spring 244 on the pad 23 through the pressure plate 212, thereby making the pad 23 stably attached to the bottom of the sampling tube 1. When placing the sampling cylinder 1 in the drying or dehumidifying device, it needs to be placed upside down. Then, the motor 251 drives the threaded rod 22 to rotate, pushing the piston plate 21 outwards. As the cutter 211 moves, the negative pressure intensity inside the bottom opening of the sampling cylinder 1 gradually decreases, causing the suction force of the sampling cylinder 1 on the pad 23 to gradually decrease. When the suction force of the negative pressure chamber inside the sampling cylinder 1 on the pad 23 is less than the pushing force of the first spring 244 on the push ring 243, the pressure plate 212, which is retracted into the cutter 211, is pushed out again from the cutter 211, pushing the pad 23 away from the sampling cylinder 1 and automatically releasing the closed state of the bottom opening of the sampling cylinder 1. Simultaneously, the second connecting hole 353 is realigned with the diversion groove 351. Due to the contraction and deformation of the airbag 32, the airbag 32... Gas flows into the guide groove 341 through the first connecting hole 352, the diversion groove 351, and the second connecting hole 353, which greatly increases the pressure in the guide groove 341. This pushes out part of the piston rod 342 from the guide groove 341. The piston rod 342 extending from the guide groove 341 supports the fiber material sample at multiple points on the bottom side of the fiber material sample, thereby separating the fiber material sample from the pressure plate 212. At the same time, the motor 251 pushes out part of the pressure plate 212 from the sampling cylinder 1. Then, the operator removes the pad 23 from the fiber material sample. At this time, the fiber material sample is placed relatively stably on the top side of the sampling cylinder 1. The fiber material sample can fully contact the air in the drying device or the air in the dehumidification device, which facilitates the drying or dehumidification operation of the fiber material sample. It should be noted that when the cutter 211 and the pressure plate 212 are reset, the pressure plate 212 vibrates as the push ring 243 collides with the inner wall of the annular groove 242. At this time, due to the pressure of the pressure plate 212 on the fiber material sample, the fiber material sample will not slip off the pressure plate 212 due to the vibration of the pressure plate 212. After the above-mentioned device is used, the operator manually presses the pressure plate 212 so that the second connecting hole 353 is aligned with the annular groove 242. At this time, due to the push of the piston rod 342 by the second spring 343, the gas in the guide groove 341 passes through the annular groove 242 and the gap between the push plate and the inner wall of the cutter 211 and is discharged. Then, the pressure plate 212 is released, and the gas in the airbag 32 flows back into the second connecting hole 353 or the guide groove 341 through the first connecting hole 352 and the diversion groove 351. According to the above repeated operation, the reciprocating movement of the pressure plate 212 eventually causes the excess gas in the airbag 32 to be discharged.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A sampling device for detecting the water absorption of fiber materials, comprising a sampling cylinder (1), characterized in that: The sampling tube (1) is provided with a sampling assembly (2), which includes a piston plate (21). The piston plate (21) is mainly composed of a cutter (211) and a pressure plate (212). The outer peripheral wall of the cutter (211) is in contact with the inner wall of the sampling tube (1). The top of the pressure plate (212) is inserted into the inner hole of the cutter (211) and contacts the inner hole wall of the cutter (211). The top side of the cutter (211) is fixedly equipped with a threaded rod (22) by a connecting rod and bolt. The outer peripheral side of the top of the threaded rod (22) is threaded with a threaded tube (27). The bottom side of the sampling tube (1) is provided with a pad (23). The pressure plate (212) and the cutter (211) are connected by a connecting mechanism (24). The top opening of the sampling tube (1) is provided with a driving mechanism (25). The outer peripheral side of the threaded tube (27) is provided with a limiting mechanism (26). The cutter (211) and the pressure plate (212) are provided with a support assembly (3). The support assembly (3) includes an airbag (32). The top of the cutter (211) is provided with a number of storage slots (31) arranged in a circular array. The airbag (32) is located in the corresponding storage slot (31). The bottom end of the airbag (32) extends to the outside of the cutter (211) and is fixedly connected to the cutter (211). The outer peripheral wall of the airbag (32) is in clearance fit with the inner wall of the corresponding storage slot (31). The top end of the airbag (32) is fixedly connected to the inner wall of the corresponding storage slot (31). The bottom side of the airbag (32) is provided with a one-way valve (33). The exhaust end of the one-way valve (33) is fixedly inserted into the bottom opening of the corresponding airbag (32). The pressure plate (212) is provided with a pushing mechanism (34). The pushing mechanism (34) and the airbag (32) are connected by an air guiding mechanism (35).

2. The sampling device for detecting the water absorption of fiber materials according to claim 1, characterized in that: The cutter (211) is ring-shaped, the inner ring edge at the bottom of the cutter (211) is beveled, and the top cross-section of the cutter (211) is L-shaped. The bottom side of the pressure plate (212) is frustum-shaped.

3. The sampling device for detecting the water absorption of fiber materials according to claim 2, characterized in that: The connecting mechanism (24) includes a limiting ring (241), which is fixedly sleeved at the middle position of the outer periphery of the pressure plate (212). An annular groove (242) is provided on the inner ring wall of the cutter (211) at the position corresponding to the limiting ring (241), and the limiting ring (241) is located in the annular groove (242). A push ring (243) is fixedly sleeved on the outer periphery of the limiting ring (241), and the outer periphery of the push ring (243) is in contact with the inner wall of the annular groove (242). A plurality of first springs (244) are arranged in a circular array between the top side of the push ring (243) and the inner wall of the annular groove (242), and both ends of each first spring (244) are fixedly connected to the push ring (243) and the inner wall of the annular groove (242) respectively.

4. The sampling device for detecting the water absorption of fiber materials according to claim 3, characterized in that: The driving mechanism (25) includes a transmission gear (253). A motor (251) is fixedly mounted on the inner wall of the top opening of the sampling tube (1) by a connecting block. A main gear (252) is fixedly mounted on the driving end of the motor (251). The transmission gear (253) is fixedly sleeved at the middle position of the outer periphery of the threaded rod (22), and the transmission gear (253) is meshed with the main gear (252). The transmission gear (253) is located on the bottom side of the threaded tube (27).

5. A sampling device for detecting the water absorption of fiber materials according to claim 4, characterized in that: The limiting mechanism (26) includes a collar (261), which is rotatably sleeved on the outer periphery of the threaded tube (27) via a bearing. The outer periphery of the threaded tube (27) has a plurality of positioning grooves (262) arranged in a circular array. The inner ring wall of the collar (261) has an air storage groove (263) at the position corresponding to the positioning groove (262). A piston push rod (264) is slidably installed in the air storage groove (263). A ball (265) is rotatably installed in the piston push rod (264), and one end of the ball (265) close to the corresponding positioning groove (262) is inserted into the corresponding positioning groove (262) and contacts the inner wall of the corresponding positioning groove (262).

6. A sampling device for detecting the water absorption of fiber materials according to claim 5, characterized in that: The collar (261) is fixedly connected to the inner wall of the top opening of the sampling tube (1) by several connecting plates, and the top side of the collar (261) and the top side of the threaded tube (27) are coplanar with the top side of the sampling tube (1).

7. A sampling device for detecting the water absorption of fiber materials according to claim 6, characterized in that: The pushing mechanism (34) includes several piston rods (342). The bottom side of the pressure plate (212) is provided with several guide grooves (341) in a circumferential array. The piston rods (342) are located in the corresponding guide grooves (341), and the outer peripheral wall of the piston rods (342) is in contact with the inner wall of the corresponding guide grooves (341).

8. A sampling device for detecting the water absorption of fiber materials according to claim 7, characterized in that: The piston rod (342) is wound with a second spring (343) on its outer periphery, and the two ends of the second spring (343) are fixedly connected to the inner wall of the corresponding piston rod (342) and the corresponding guide groove (341), respectively.

9. A sampling device for detecting the water absorption of fiber materials according to claim 8, characterized in that: The air guiding mechanism (35) includes a flow divider (351) in the shape of an annular arrangement. The flow divider (351) is opened on the inner ring wall of the cutter (211) and is located below the annular groove (242). The interior of the top opening of the airbag (32) is connected to the interior of the flow divider (351) through the first connecting hole (352). A second connecting hole (353) is opened on the outer peripheral wall of the pressure plate (212) at the position corresponding to the first connecting hole (352), and the interior of the bottom opening of the second connecting hole (353) is connected to the interior of the corresponding guide groove (341).

10. A sampling device for detecting the water absorption of fiber materials according to claim 9, characterized in that: Two sealing rings (354) are fixedly installed in the inner wall of the cutter (211) at the position corresponding to the diversion groove (351), and the inner ring wall of each sealing ring (354) is in contact with the outer peripheral wall of the pressure plate (212). The two sealing rings (354) are arranged opposite to each other on the upper and lower sides of the diversion groove (351), and the upper sealing ring (354) is located between the diversion groove (351) and the annular groove (242).

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