Drying cylinder raw material detection device and detection process thereof

Abstract

The invention discloses a drying cylinder raw material detection device and a detection process thereof. The drying cylinder raw material detection device comprises a drying cylinder, and a grinding unit for grinding a sample is rotationally arranged at the bottom of the drying cylinder; a sampling unit is arranged on the grinding unit, a mounting cover is arranged at the bottom of the drying cylinder, and the sampling unit comprises a sampling hole, and a sampling pipe and a feeding pipe which are fixedly connected with the grinding unit; a feeding hole matched with the sampling hole is formed in the mounting cover, and a rotating plate is arranged on the feeding pipe; a spectrograph is arranged on the drying cylinder, a material receiving disc connected with the grinding unit is arranged on the spectrograph, and the grinding unit comprises a discharging hole matched with the material receiving disc; the sample is prepared into fine and uniform powder through the liquid nitrogen cooling and grinding unit, interference of the particle size, shape and stacking density of the raw material on moisture detection is thoroughly eliminated, detection is performed in combination with a near-infrared spectrometer, and the result is as high as the laboratory precision and is far superior to that of an existing on-line sensor.

Description

Technical Field

[0001] This invention relates to the field of chemical fiber raw material testing technology, and in particular to a raw material testing device for a drying cylinder and its testing process. Background Technology

[0002] In the production of synthetic fibers, drying the raw polymer particles is a crucial pretreatment step. The purpose of drying is to reduce the moisture content in the chips to an extremely low level to prevent hydrolytic degradation during subsequent melt spinning, which can lead to problems such as decreased molecular weight, fiber breakage, and fiber drift, thus severely affecting the strength, uniformity, and final product quality of the synthetic fiber precursor.

[0003] Currently, the drying process is usually carried out in a drying drum under high temperature and dehumidified dry air environment. The drying drum is both a raw material storage device and a continuously operating drying reactor. Therefore, real-time and accurate detection of the state of the raw materials in the drying drum, especially the monitoring of moisture content, is the core link to ensure drying effect, improve product quality and production stability.

[0004] In existing technologies, the detection of moisture content in raw materials inside drying drums generally employs online sensors based on electrical principles, primarily resistive and capacitive moisture sensors. These sensors indirectly estimate moisture content by measuring changes in the resistance or dielectric constant of the raw material pile. However, inherent flaws in their operating principles lead to numerous insurmountable technical problems in practical applications. 1. Measurement accuracy is affected by various physical properties, resulting in poor reliability: The sensor's output signal is not only a function of moisture content, but also strongly correlated with the physical states of the raw material, such as bulk density, temperature, particle size and distribution, and contact pressure. Fluidization of the slices within the drying drum, changes in material level, and fluctuations in process temperature can all cause significant changes in these parameters, thus introducing substantial measurement errors.

[0005] 2. Frequent maintenance and calibration: To ensure the relative accuracy of measurements, frequent shutdowns for manual sampling and laboratory calibration are necessary, which not only increases the workload of operators but also makes it impossible to achieve true closed-loop control. Summary of the Invention

[0006] This invention addresses the shortcomings of existing technologies by providing a raw material detection device for a drying cylinder and its detection process, thereby solving the problems of low detection accuracy and high susceptibility to interference of existing online moisture sensors.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a drying cylinder raw material detection device, comprising a drying cylinder, wherein a grinding unit for grinding samples is rotatably arranged at the bottom of the drying cylinder; The grinding unit is equipped with a sampling unit for sampling the raw materials in the drying cylinder. The bottom of the drying cylinder is equipped with a mounting cover for installing the grinding unit and the sampling unit. The sampling unit includes a sampling hole and a sampling tube and a feed tube that are fixedly connected to the grinding unit. The mounting cover is provided with a feed hole adapted to the sampling hole, and the feed pipe is provided with a rotating plate for mounting the sampling hole; The drying cylinder is equipped with a spectrometer, which is connected to a grinding unit with a receiving plate. The grinding unit includes a discharge hole that cooperates with the receiving plate.

[0008] In the above scheme, preferably, the grinding unit includes a mortar and a motor, the mortar is provided with a first eccentric block and a second eccentric block, and the first eccentric block is provided with an eccentric hole that cooperates with the second eccentric block.

[0009] In the above scheme, preferably, the mortar is covered with a first cooling pipe, the mortar includes a grinding chamber, and the mortar is provided with a second cooling pipe connected to the grinding chamber. The first cooling pipe and the second cooling pipe are connected to a liquid nitrogen pump through a pipe.

[0010] In the above scheme, preferably, the motor output shaft is fixedly connected to the bowl body via a connecting rod, the discharge hole is provided with a rotating door plate, and the connecting rod is provided with a push rod connected to the rotating door plate.

[0011] In the above scheme, preferably, the sampling tube is provided with a plurality of quantitative components, and a filter plate is provided between adjacent quantitative components. The quantitative components are used to quantitatively transport materials within each particle size range into the feed tube.

[0012] In the above scheme, preferably, the quantitative component includes a quantitative ring, which has a first ring wall adapted to the sampling tube and a second ring wall adapted to the feed tube. The quantitative ring is laterally slidably disposed between the sampling tube and the feed tube to realize the transportation of material in the sampling tube to the feed tube.

[0013] In the above scheme, preferably, the quantitative ring is provided with a driving rod on one side of the first ring wall, and the inner wall of the mounting cover is provided with a guide block for causing the driving rod to move laterally after being squeezed.

[0014] In the above scheme, preferably, the quantitative ring is provided with a guide rod that cooperates with the wall of the feed pipe on one side of the second ring wall, the guide rod passes through the feed pipe and is fixed with a positioning plate, and a return spring is provided between the positioning plate and the feed pipe.

[0015] In the above scheme, preferably, the metering tube is provided with a baffle plate extending away from the first annular wall on one side.

[0016] In the above scheme, a preferred detection process for a raw material detection device for a drying cylinder is characterized by the following: S1: The grinding unit rotates at a certain angle, causing the sampling unit to rotate synchronously so that the sampling hole and the feed hole are concentric. At this time, the large and small particles of material in the drying cylinder enter the sampling tube and are separated into layers by the filter plate. S2: The grinding unit rotates in the opposite direction to reset, so that the sampling unit rotates in the opposite direction to reset synchronously. During the rotation, the drive rod on the quantitative component is guided by the guide block, so that the positioning ring slides laterally from the sampling tube to the feed tube, so that each particle size enters the sampling tube in the same proportion. S3: After the raw material particles enter the grinding unit, the particles are ground into fine particles by the reciprocating rotation of the grinding unit. After grinding, the particles are transferred to the receiving tray through the discharge hole. S4: The particles in the receiving tray are subjected to moisture detection by a spectrometer to achieve accurate detection of the moisture content of the raw materials in the raw material cylinder.

[0017] The beneficial effects of the present invention are as follows: The raw material detection device and detection process for the drying cylinder provided by the present invention have the following significant advantages: 1. High precision and low interference: The sample is prepared into a fine and uniform powder by liquid nitrogen cooling and grinding unit, which completely eliminates the interference of raw material particle size, shape and bulk density on moisture detection. Combined with near-infrared spectroscopy for detection, the results are comparable to laboratory precision and far superior to existing online sensors.

[0018] 2. High real-time detection capability: Sampling, cooling, grinding and detection are integrated at the bottom of the drying cylinder, realizing online automated operation. A detection cycle can be completed in tens of seconds to several minutes, providing near real-time quality feedback and overcoming the lag of offline detection.

[0019] 3. The quantitative component can collect raw materials of different particle sizes in proportion during the sampling process, ensuring the consistency of the overall state of the analytical sample and the raw materials in the drying cylinder, making the test results more representative.

[0020] 4. The invention has a high degree of automation, which greatly reduces manual intervention and improves production efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0022] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0023] Figure 3 This is a top view cross-sectional diagram of the first eccentric block of the present invention.

[0024] Figure 4 This is a cross-sectional view of the sampling unit and quantitative component of the present invention in the grinding state.

[0025] Figure 5 This is a transverse cross-sectional view of the sampling unit and quantitative component of the present invention in the feeding state through the feed hole. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: See also Figures 1-5 .

[0027] A raw material testing device for a drying cylinder includes a drying cylinder 1 for drying or storing particulate raw materials. A grinding unit 2 for grinding samples is rotatably mounted at the bottom of the drying cylinder 1. Specifically, a mounting cover 4 is built into the bottom of the drying cylinder 1. Figure 1 As shown, the grinding unit 2 is disposed inside the mounting cover 4.

[0028] The grinding unit 2 includes a mortar 202 and a motor 20. The main body of the motor 20 is fixed on the base at the bottom of the drying cylinder 1, and the output shaft is fixedly connected to the lower end face of the mortar 202 through a connecting rod 209, so that the motor 20 drives the mortar 202 to rotate and grind the material in the mortar so that the material is ground into fine particles.

[0029] The mortar 202 is provided with multiple eccentric blocks, such as Figure 2 As shown, it includes a first eccentric block 203 and a second eccentric block 204 disposed within the first eccentric block 203. The first eccentric block 203 has an eccentric hole 205 in the middle, and the second eccentric block 204 is disposed within the eccentric hole 205. The eccentric hole 205 is a through hole. The first eccentric block 203 and the second eccentric block 204 are disposed within the grinding chamber 207 of the mortar 202. The eccentric hole 205 of the first eccentric block 203 is not concentric with the axis of the first eccentric block 203. Thus, after the mortar 202 rotates, the first eccentric block 203 will randomly impact the grinding chamber 207 at any angle. At the same time, because the second eccentric block 204 is disposed within the eccentric hole 205, the material falling into the eccentric hole 205 can also be randomly impacted and ground by the second eccentric block 204.

[0030] Both the first eccentric block 203 and the second eccentric block 204 are high wear-resistant alloy blocks, and the main body of the mortar 202 is also made of high wear-resistant alloy. A first annular cooling pipe 206 is wound around the outer wall of the mortar 202, which can be filled with liquid nitrogen so that the overall temperature of the mortar 202 and the temperature of the raw material particles can be controlled and maintained when the mortar 202 is impacted by the eccentric block and the particles. A second cooling pipe 208 connected to the grinding chamber 207 is provided on the upper surface of the mortar 202. The second cooling pipe 208 and the first cooling pipe 206 are connected to the liquid nitrogen pump through a pipe. At the same time, a reversing valve can be provided between the first cooling pipe 206 and the second cooling pipe 208 to realize the switching of liquid nitrogen between the first cooling pipe 206 and the second cooling pipe 208.

[0031] When the second cooling pipe 208 passes liquid nitrogen into the grinding chamber 207, it can cool the particulate material in the grinding chamber 207 with liquid nitrogen, keeping it at a low temperature and quickly maintaining the moisture content of the particulate material through liquid nitrogen quenching.

[0032] The grinding unit 2 is equipped with a sampling unit 3 for sampling the raw materials in the drying cylinder 1. The sampling unit 3 is also located inside the mounting cover 4. Specifically, the mortar 202 is fixedly provided with a feed pipe 303 at its center. The feed pipe 303 is connected to the grinding chamber 207. The feed pipe 303 is fixedly provided on the upper surface of the mortar 202. One end of the feed pipe 303 is fixedly connected to the mortar 202, and the upper end is rotatably connected to the center of the mounting cover 4 through a shaft.

[0033] The feed pipe 303 is provided with a rotating plate 304 that fits against the inner end face of the mounting cover 4, such as Figure 2 As shown, the upper end face of the rotating plate 304 is in contact with the lower end face of the mounting cover 4, and the outer edge is rotatably in contact with the inner side wall of the mounting cover 4. That is, the mounting cover 4 is preferably a cylindrical cover. The mounting cover 4 is provided with a feed hole 401 on the side of the feed pipe 303 circumferential axis. A sampling pipe 302 is connected in parallel to the outside of the pipe wall on one side of the feed pipe 303. The upper end of the sampling pipe 302 is fixedly connected to the rotating plate 304. The rotating plate 304 is provided with a sampling hole 301 that communicates with the pipe hole of the sampling pipe 302. When the grinding unit 2 is in such a state... Figure 2 In the state shown, the feed hole 401 is blocked by the rotating plate. When the grinding unit 2 rotates 180° by the motor 20, the sampling hole 301 rotates 180° with the rotating plate 304 and is coaxial with the feed hole 401. At this time, the granular material in the drying cylinder 1 can fall into the sampling tube 302 through the feed hole 401 and the sampling hole 301.

[0034] To ensure the representativeness of the samples, multiple layers of filter plates 305 are arranged inside the sampling tube 302 from top to bottom. This embodiment takes the arrangement of one layer of filter plate 305 as an example. Figure 2As shown, the sampling tube 302 is divided into upper and lower tubes. After the material enters the sampling tube 302, the filter plate 305 above it divides the pipe into two sections for stratifying raw materials of different particle sizes. In each section, near the upper surface of the filter plate 305, a quantitative component 6 is provided. A quantitative component 6 is also provided on the upper inner wall of the lower end of the sampling tube 302, so that the particulate material in each section can be quantitatively transported to the feed pipe 303 through the quantitative component 6. That is, the same volume of material from each section is taken and transported to the feed pipe 303 in a volume ratio of 1:1, thereby improving the overall uniformity of the moisture content of the material.

[0035] The quantitative component 6 includes a transversely sliding quantitative ring 601. The right side of the quantitative ring 601 is provided with a first ring wall 602 that is adapted to the inner wall of the sampling tube 302, and the left side is provided with a second ring wall 603 that is adapted to the inner wall of the feed tube 303. A driving rod 604 is welded to one side of the first ring wall 602 of the metering ring 601. A guide block 605 with a specific profile is fixed on the inner wall of the mounting cover 4. After the metering ring 601 rotates with the grinding unit 2, the driving rod 604 can be deformed by contacting the guide block 605, causing the driving rod 604 to drive the metering ring 601 to slide laterally. The feed pipe 303 is provided with a second slot that matches the second ring wall 603, and the sampling pipe 302 is provided with a first slot that matches the first ring wall 602, so that the metering ring 601 can switch back and forth between the sampling pipe 302 and the feed pipe 303, so as to quantitatively transport the particulate material received by the metering ring 601 in the sampling pipe 302 into the feed pipe 303.

[0036] The guide block 605 includes a driving section 61 and a swing section 62. When the driving rod 604 abuts against the swing section 62, at this time... Figure 4 In the indicated state, motor 20 drives mortar 202 to reciprocate, thereby realizing the grinding of particles by grinding unit 2 after particles enter grinding chamber 207; when drive rod 604 contacts the inner wall of mounting cover 4 along drive section 61, that is, by Figure 5 State transition to Figure 4 During the process, the drive rod 604 contacts the drive section 61 to achieve the squeezing of the drive rod 604, thereby causing the metering ring 601 to slide towards the feed pipe 303, so that the material in the metering ring 601 is meteredly delivered into the feed pipe 303.

[0037] The quantitative ring 601 is provided with a guide rod 606 on one side of the second ring wall 603. After the guide rod 606 passes through the guide hole on the wall of the feed pipe 303, a positioning plate 607 is fixed at its end. A return spring is sleeved between the positioning plate 607 and the outer wall of the feed pipe 303. The return spring is a tension spring, so that when the drive rod 604 is disengaged from the guide block 605, the quantitative ring 601 can be reset by the return spring and placed in the sampling tube 302. In addition, a baffle plate 608 extends from the quantitative ring 601 to the drive rod 604 on one side of the first ring wall 602. The upper end face of the baffle plate 608 is flush with the upper end face of the quantitative ring 601, so that when the quantitative ring 601 slides to the left to the feed pipe 303, the material in the sampling tube 302 above the quantitative ring 601 will not fall.

[0038] A spectrometer 5 is mounted on the support of the bottom outer wall of the drying cylinder 1. The spectrometer 5 has a receiving tray 501 connected to the grinding unit 2. A sapphire window is located at the bottom of the receiving tray 501. The spectrometer 5 scans and analyzes the powder through the sapphire window to measure the moisture content of the material in the receiving tray 501. The grinding unit 2 includes a discharge hole 201 that cooperates with the receiving tray 501. A rotating door plate 210 is mounted on the discharge hole 201. One end of the rotating door plate is rotatably mounted on one side of the discharge hole 201 via a rotating shaft. Figure 1-2 As shown, the outer wall of the connecting rod 209 is provided with a push rod 211 connected to the rotating door plate 210. The main body end of the push rod 211 is rotatably connected to the connecting rod 209 through a pin. The push rod end is rotatably connected to the lower end face of the rotating door plate 210 away from the rotation point of the rotating door plate 210 through a pin. After grinding is completed, the rotating door plate 210 is opened by the push rod 211. At the same time, the grinding unit 2 is oscillating back and forth by the motor 20, so that the particulate material in the grinding chamber 207 is discharged into the receiving tray 501. Preferably, the push rod 211 is an electric push rod, which can be automatically controlled by a PLC controller. The motor 20 is linked with the temperature control mechanism or fan unit of the drying cylinder 1 to realize the automated operation control of the whole machine.

[0039] The process of using the raw material testing device with the drying cylinder as described above: S1: Sampling The control system starts the motor 203, which drives the grinding unit 2 (including the mortar 202 and the feed tube 303) and the sampling unit 3 (including the rotating plate 304 and the sampling tube 302) fixed on it to rotate 180 degrees together; Rotate to align and concentrically link the sampling hole 301 on the rotating plate 304 with the feed hole 401 on the mounting cover 4; The granular raw material inside the drying cylinder 1 falls into the sampling tube 302 through the feed hole 401 and the sampling hole 301 under the action of gravity; As the raw material falls through the sampling tube 302, it passes through the filter plate 305 and is stratified according to particle size. S2: Quantitative feeding After sampling is completed, motor 203 rotates in the opposite direction, driving sampling unit 3 to rotate and reset; During the rotation, the drive rod 604 on the metering component 6 comes into contact with and is squeezed by the guide block 605 fixed to the inner wall of the mounting cover 4; The squeezing force forces the metering ring 601 to overcome the tension of the return spring and slide laterally along the guide rod 606, moving from the position of the closed sampling tube 302 to the position of the closed feed tube 303; During this sliding process, the metered material in the cavity enclosed by the metering ring 601 is carried from the sampling tube 302 into the feed tube 303 and falls into the feed tube 303, thereby ensuring that the material of each particle size layer enters the subsequent process in proportion.

[0040] S3: Cooling and Grinding A quantitative sample falls into the grinding chamber 207 of the mortar 202 through the feed pipe 303; Liquid nitrogen cooling: The liquid nitrogen pump starts while the quantitative sample is being delivered, and liquid nitrogen is introduced into the grinding chamber 207 through the second cooling pipe 208 and radiates into the feed pipe 303 to quench the sample instantly and lock its moisture state; at the same time, the first cooling pipe 206 can also cool the mortar 202 as a whole.

[0041] Grinding: The motor 203 drives the mortar 202 to rotate back and forth at a small angle, causing the first eccentric block 203 and the second eccentric block 204 inside it to move randomly and irregularly in the grinding chamber 207, so as to efficiently impact and grind the brittle sample and prepare it into a uniform fine powder.

[0042] S4: Discharge and Inspection After grinding is completed, the motor 203 controls the mortar 202 to rotate at a small angle and reciprocate. During the rotation, the push rod 211 on the connecting rod 209 is driven to rotate the door plate 210 to open the discharge hole 201. The powder sample in the mortar 202 is discharged through the discharge hole 201 under gravity or slight oscillation and falls into the receiving tray 501; Moisture detection: The near-infrared spectrometer 5 scans the powder sample through the sapphire window at the bottom of the receiving tray 501, analyzes its spectral characteristics, calculates the precise moisture content, and transmits the data to the control system in real time to complete one detection cycle.

[0043] A detection process for a raw material detection device for a drying cylinder is as follows: S1: The grinding unit 2 rotates at a certain angle, which drives the sampling unit 3 to rotate synchronously so that the sampling hole 301 and the feed hole 401 are concentric. At this time, the large and small particles of material in the drying cylinder 1 enter the sampling tube 303 and are separated into layers by the filter plate 305. S2: The grinding unit 2 rotates in the opposite direction to reset, causing the sampling unit 3 to rotate in the opposite direction to reset synchronously. During the rotation, the drive rod 604 on the quantitative component 6 is guided by the guide block 605, causing the positioning ring 601 to slide laterally from the sampling tube 302 to the feed tube 303, so that each particle size enters the sampling tube 302 in the same proportion. S3: After the raw material particles enter the grinding unit 2, the particles are ground into fine particles by the reciprocating rotation of the grinding unit 2. After grinding, the particles are transferred to the receiving tray 501 through the discharge hole 201. S4: The particles in the receiving tray 501 are subjected to moisture detection by the spectrometer 5, so as to achieve accurate detection of the moisture content of the raw materials in the raw material cylinder.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A raw material detection device for a drying cylinder, comprising a drying cylinder (1), characterized in that: The bottom of the drying cylinder (1) is rotatably equipped with a grinding unit (2) for grinding samples; The grinding unit (2) is provided with a sampling unit (3) for sampling the raw materials in the drying cylinder (1). The bottom of the drying cylinder (1) is provided with a mounting cover (4) for installing the grinding unit (2) and the sampling unit (3). The sampling unit (3) includes a sampling hole (301) and a sampling tube (302) and a feed tube (303) that are fixedly connected to the grinding unit (2). The mounting cover (4) is provided with a feed hole (401) that is compatible with the sampling hole (301), and the feed pipe (303) is provided with a rotating plate (304) for mounting the sampling hole (301). The drying cylinder (1) is equipped with a spectrometer (5), and the spectrometer (5) is equipped with a receiving plate (501) connected to the grinding unit (2). The grinding unit (2) includes a discharge hole (201) that cooperates with the receiving plate (501).

2. The raw material detection device for a drying cylinder according to claim 1, characterized in that: The grinding unit (2) includes a mortar (202) and a motor (20). The mortar (202) is provided with a first eccentric block (203) and a second eccentric block (204). The first eccentric block (203) is provided with an eccentric hole (205) that cooperates with the second eccentric block (204).

3. The raw material detection device for a drying cylinder according to claim 1, characterized in that: The mortar (202) is covered with a first cooling pipe (206). The mortar (202) includes a grinding chamber (207). The mortar (202) is provided with a second cooling pipe (208) connected to the grinding chamber (207). The first cooling pipe (206) and the second cooling pipe (208) are connected to a liquid nitrogen pump through a pipe.

4. The raw material detection device for a drying cylinder according to claim 1, characterized in that: The output shaft of the motor (203) is fixedly connected to the mortar (202) via a connecting rod (209). A rotating door plate (210) is provided on the discharge hole (201), and a push rod (211) connected to the rotating door plate (210) is provided on the connecting rod (209).

5. The raw material detection device for a drying cylinder according to claim 1, characterized in that: The sampling tube (302) is provided with several quantitative components (6), and a filter plate (305) is provided between adjacent quantitative components (6). The quantitative components (6) are used to quantitatively transport materials within each particle size range into the feed tube (303).

6. The raw material detection device for a drying cylinder according to claim 5, characterized in that: The quantitative component (6) includes a quantitative ring (601), which has a first ring wall (602) adapted to the sampling tube (302) and a second ring wall (603) adapted to the feed tube (303). The quantitative ring (601) is laterally slidably disposed between the sampling tube (302) and the feed tube (303) to realize the transportation of material in the sampling tube (302) to the feed tube (303).

7. The raw material detection device for a drying cylinder according to claim 6, characterized in that: The quantitative ring (601) is provided with a drive rod (604) on one side of the first ring wall (602), and the inner wall of the mounting cover (4) is provided with a guide block (605) for the drive rod (604) to move laterally after being squeezed.

8. The raw material detection device for a drying cylinder according to claim 7, characterized in that: The quantitative ring (601) is provided with a guide rod (606) on one side of the second ring wall (603) that cooperates with the wall of the feed pipe (303). After the guide rod (606) passes through the feed pipe (303), a positioning plate (607) is fixedly provided. A reset spring is provided between the positioning plate (607) and the feed pipe (303).

9. A raw material detection device for a drying cylinder according to claim 6, characterized in that: The metering tube (601) is located on one side of the first annular wall (602) and is provided with a baffle plate (608) extending away from the first annular wall (602).

10. The detection process using the raw material detection device for a drying cylinder as described in claim 8, characterized in that: The testing process is as follows: S1: The grinding unit (2) rotates at a certain angle to drive the sampling unit (3) to rotate synchronously so that the sampling hole (301) and the feed hole (401) are concentric. At this time, the large and small particles in the drying cylinder (1) enter the sampling tube (303) and are separated into layers by the filter plate (305). S2: The grinding unit (2) rotates in the opposite direction to reset, so that the sampling unit (3) rotates in the opposite direction to reset synchronously. During the rotation, the drive rod (604) on the quantitative component (6) is guided by the guide block (605) so that the positioning ring (601) slides laterally and slides from the sampling tube (302) to the feed tube (303) so that each particle size enters the sampling tube (302) in the same proportion. S3: After the raw material particles enter the grinding unit (2), the particles are ground into fine particles by the reciprocating rotation of the grinding unit (2). After grinding, the particles are transferred to the receiving tray (501) through the discharge hole (201). S4: The particles in the receiving tray (501) are subjected to moisture detection by a spectrometer (5) to achieve accurate detection of the moisture content of the raw materials in the raw material cylinder.

Images