Material conveying system with on-line moisture detection function for materials and its material moisture detection device

Abstract

The present invention discloses a material conveying system with a material online moisture detection function and a material moisture detection device thereof, wherein the material moisture detection device comprises a material drop bin, a conveying screw device and a detection device. The conveying screw device comprises a conveying pipeline, a return pipeline and a conveying screw, wherein the conveying screw is built into the conveying pipeline, and the conveying screw is used to convey the material entering the conveying pipeline from the material drop bin toward the return pipeline; the detection part of the moisture detector in the detection device is exposed in the return pipeline. With such an arrangement, the material forms a stable material flow in the return pipeline, and the material to be tested stably covers the detection part of the moisture detector within a unit time, thereby improving the measurement accuracy of the moisture detector, realizing online and real-time monitoring and control of the moisture parameters of the material, and dynamically predicting the moisture content of the product, so that the material moisture detection device has the function of being able to feedback the moisture parameters of the material in real time and automatically adjust the relevant parameter settings of the processed material.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring mechanisms, and particularly to a material conveying system with an online moisture detection function for materials and a material moisture detection device thereof. Background Art

[0002] Generally, when detecting the moisture content of materials, the traditional moisture detection method is to manually grab materials at regular intervals and then use a moisture tester to measure the moisture content of the materials. During the measurement process, the moisture detector quickly dries the materials. During the drying process, it continuously measures and immediately displays the ratio of the moisture content lost by the sample. After the drying program is completed, it displays the finally measured moisture content value. This method takes a long time and has low efficiency. Moreover, due to the slow measurement speed, the moisture adjustment effect of the materials in actual operation lags behind, resulting in the phenomenon of over-dried or over-wet materials, causing waste of energy; or a moisture detector is directly installed below the silo, and the materials directly pass through the probe of the moisture detector during the material transportation process for real-time detection of the material moisture. At this time, the materials in the silo are in a conveying state, and the residence time and quantity of materials staying on the moisture detector probe are both unstable. However, during the process of detecting the moisture content of materials, the moisture detector needs to ensure that a certain amount of materials stay stably on the probe of the moisture detector per unit time. The unstable material flow will affect the measurement accuracy of the moisture detector, resulting in a large deviation in the moisture detection result. Summary of the Invention

[0003] The main purpose of the present invention is to provide a material moisture detection device, aiming to achieve online real-time monitoring and control of the material moisture, dynamically predict the moisture content of the product, and avoid the unstable material flow affecting the measurement accuracy of the moisture detector when the materials pass through the probe of the moisture detector, and reduce the deviation of the detection result of the moisture detector.

[0004] To achieve the above object, the present invention provides a material moisture detection device, and the material moisture detection device includes a blanking bin, a conveying screw device, and a detection device; wherein,

[0005] The conveying screw device includes a conveying pipeline, a return pipeline, and a conveying screw. The conveying pipeline connects the blanking bin with the return pipeline. The conveying screw is disposed inside the conveying pipeline. The conveying screw is used to convey the materials entering the conveying pipeline from the blanking bin into the return pipeline. The return pipeline has an outlet for connecting the material conveying pipeline.

[0006] The detection device includes a moisture detector, and the detection part of the moisture detector is exposed inside the return pipeline.

[0007] Through the above technical solution, the unstable materials are separated separately by the blanking bin and enter the conveying pipeline. The materials are pushed into the return pipeline by the conveying screw to ensure that a stable material flow is formed in the return pipeline equipped with the moisture detector, ensuring that the material to be measured stably covers the detection part of the moisture detector per unit time, improving the measurement accuracy of the moisture detector, enabling online and real-time monitoring and control of the moisture parameters of the materials in the pipeline, dynamically predicting the moisture content of the product, and enabling the material moisture detection device to have the function of real-time feedback of the material moisture parameters and automatic adjustment of the relevant parameter settings for processing the materials.

[0008] In some embodiments of the present invention, a detection port is opened at the bottom of the return pipeline, and the detection part extends into the return pipeline from the detection port.

[0009] Through the above technical solution, when the detection port is opened on the side wall or top of the return pipeline, the detection accuracy of the moisture detector cannot be satisfied, which easily causes deviation in the moisture detection of the material flow by the detection part. In view of this, in this technical solution, the detection port is opened at the bottom of the return pipeline, so that when the material flow passes through the return pipeline, it can fully cover the detection port, meeting the detection accuracy of the moisture detector. At this time, the detection part of the moisture detector placed in the detection port can accurately detect the moisture of the material flow covering the detection port.

[0010] In some embodiments of the present invention, the return pipeline is obliquely arranged relative to the horizontal plane, and the outlet of the return pipeline is located at the upper end of the return pipeline.

[0011] Through the above technical solution, when the materials are transported in the return pipeline, since the return pipeline is inclined upward in the material transportation direction, the materials will not slide under the action of gravity in the return pipeline, but move in the return pipeline completely relying on the driving force of the conveying screw, making the conveying state of the materials controllable and stable, and improving the measurement accuracy of the moisture detector.

[0012] In some embodiments of the present invention, at least one sampling port is opened on the return pipeline.

[0013] Through the above technical solution, a sampling port is opened on the return pipeline for sampling the material flow samples required for the calibration and calibration of the moisture detector.

[0014] In some embodiments of the present invention, the material moisture detection device further includes an automatic sampling device for extracting materials from the return pipeline through the sampling port.

[0015] Through the above technical solution, the automatic sampling device is used to automatically sample the material flow in the return pipeline and ensure the consistency between the actual measured product and the extracted sample.

[0016] In some embodiments of the present invention, the automatic sampling device includes a sampling pipeline, a sampler, and a driving device. The sampling pipeline is communicated with the sampling port. The sampler is connected to the driving device, and the driving device is configured to drive the sampler to enter the sampling port through the sampling pipeline.

[0017] Through the above technical solution, the sampler shuttles between the return pipeline and the sampling pipeline under the drive of the driving device.

[0018] In some embodiments of the present invention, along the axial direction of the return pipeline, the sampling port is arranged on one side of the detection port, and the vertical height of the sampling port from the bottom of the return pipeline is not less than the minimum detection distance of the moisture detector.

[0019] Through the above technical solution, when the material is transported in the return pipeline, it will fill the space of the return pipeline. When the automatic sampling device samples through the sampling port, it can ensure that the sampler can extend into the material flow under the action of the driving device for sampling. At the same time, the sampling port is arranged on one side of the detection port, and the height of the sampling port is restricted so that when the sampler samples through the sampling port, it can exactly sample the part of the material covering the detection port and detected by the moisture detector, ensuring the real-time and on-site nature of the sample used for the calibration and calibration of the moisture detector, making the sample used for calibration and calibration consistent with the actually detected sample, which is beneficial to the calibration and calibration of the moisture detector and improves the accuracy of the detection result of the moisture detector.

[0020] In some embodiments of the present invention, the sampler is built in the sampling pipeline. The sampler includes a sampling handle and a sampling groove. One end of the sampling handle is connected to the sampling groove, and the other end of the sampling handle is connected to the driving device.

[0021] Through the above technical solution, the sampling handle can be arranged close to the pipe orifice of the sampling pipeline, which is convenient for the sampling groove to pass through the sampling port and is also convenient for the connection between the sampling groove and the driving device.

[0022] In some embodiments of the present invention, the sampling groove has a wheel-shaped member and a cross bar. The two ends of the cross bar are respectively vertically connected to the wheel-shaped member, and the diameter of the wheel-shaped member is smaller than the diameter of the return pipeline.

[0023] Through the above technical solution, the sampling groove extends into the material flow under the drive of the driving device, and the material will cover the entire roller-shaped sampling groove. Subsequently, the sampling groove is pulled out of the return pipeline by the driving device and enters the sampling pipeline. At this time, the material brought out by the sampling groove falls through the opening at the bottom of the sampling groove.

[0024] In some embodiments of the present invention, the sampler further includes a sample dropping pipe, and one end of the sample dropping pipe is connected and communicated with the sampling pipeline to form a sample receiving port.

[0025] Through the above technical solution, the material carried out by the sampling tank enters the sample dropping pipe through the sample receiving port.

[0026] In some embodiments of the present invention, the sampler further includes a sampling bag, and the other end of the sample dropping pipe is detachably connected to the sampling bag.

[0027] Through the above technical solution, the material enters the sampling bag through the sample dropping pipe. The enclosed space between the sampling bag and the sample dropping pipe can prevent the sample from flying and splashing during the falling sampling, facilitating the transfer of the obtained sample and the laboratory sample detection.

[0028] The present invention also provides a material conveying system with an on-line moisture detection function for materials. The material conveying system includes the above-mentioned material moisture detection device and a material conveying pipe. The feed port of the blanking bin is communicated with the material conveying pipe, and the outlet of the return pipe is communicated with the material conveying pipe.

[0029] Through the above technical solution, the detected material can be sent back to the material conveying pipe again, avoiding material waste.

[0030] In the technical solution of the present invention, through the cooperation of the blanking bin, the conveying screw device and the detection device, the unstable material is separated separately by the blanking bin and enters the conveying pipe. The material is pushed by the conveying screw into the return pipe to ensure that a stable material flow is formed in the return pipe equipped with the moisture detector, ensuring that the material to be measured stably covers the detection part of the moisture detector per unit time, improving the measurement accuracy of the moisture detector, enabling on-line and real-time monitoring and control of the moisture parameters of the material in the pipe, dynamically predicting the moisture content of the product, and enabling the material moisture detection device to have the function of real-time feedback of the material moisture parameters and automatically adjusting the relevant parameter settings for processing granular feed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0032] Figure 1 The first perspective structural schematic diagram of an embodiment of the material moisture detection device in the present invention;

[0033] Figure 2 The second perspective structural schematic diagram of an embodiment of the material moisture detection device in the present invention;

[0034] Figure 3Schematic diagram of the third perspective of an embodiment of the material moisture detection device in the present invention;

[0035] Figure 4 Schematic diagram of the fourth perspective of an embodiment of the material moisture detection device in the present invention;

[0036] Figure 5 Schematic diagram of an embodiment of the conveying screw device in the present invention;

[0037] Figure 6 Schematic diagram of an embodiment of the automatic sampling device in the present invention.

[0038] Explanation of the reference numerals in the drawings:

[0039] 1000, material moisture detection device; 2000, material conveying system with on-line material moisture detection function; 100, blanking bin; 200, conveying screw device; 300, detection device; 400, automatic sampling device; 500, material conveying pipeline; 210, conveying pipeline; 220, return material pipeline; 230, conveying screw; 310, moisture detector; 410, sampling pipeline; 420, sampler; 430, driving device; 440, sample dropping pipe; 221, detection port; 222, sampling port; 311, detection part; 421, sampling handle; 422, sampling groove.

[0040] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0042] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0043] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] Please refer to Figure 1 and Figure 2 The present invention provides a material moisture detection device 1000, which includes a blanking bin 100, a conveying screw device 200, and a detection device 300. The material moisture detection device 1000 is used for detecting the moisture content of industrial and agricultural raw materials such as feed, grains, fruits and vegetables, chemical raw materials, and wood chips. Hereinafter, the moisture content detection in the process of pellet feed processing will be taken as an example for illustration. Among them, the blanking bin 100 is used to separately separate unstable pellet feed and feed it into the conveying screw device 200; the conveying screw device 200 is used to stably push the pellet feed into the detection device 300; the detection device 300 is used to detect the moisture content of the pellet feed and send the detected pellet feed back to the processing line.

[0045] The blanking bin 100 can be assembled by multiple pipes, and can also be integrally formed by methods such as casting and die-casting. The shape of the blanking bin 100 can be adjusted according to the placement angle of the pellet feed moisture detection device 1000, and no specific limitation is made here. The cross-section of the pipes forming the blanking bin 100 can be square, cylindrical or other shapes, and no specific limitation is made here. The blanking bin can be installed at the discharge chute of the pellet feed drying process or at any discharge section in the pellet feed processing process, and no specific limitation is made here. Figure 2 In [description], the blanking bin 100 is assembled by two cylindrical pipes arranged at an angle, and this angle can be an acute angle, an obtuse angle, a right angle, etc. according to the layout of the on-site material conveying pipe 500, and no specific limitation is made here.

[0046] Please refer to Figure 1 and Figure 5, the conveying screw device 200 includes a conveying pipe 210, a conveying screw 230 and a return pipe 220. The conveying pipe 210 connects the blanking bin 100 with the return pipe 220, and the conveying screw 230 is disposed inside the conveying pipe 210. The conveying screw 230 is used to convey the granular feed entering the conveying pipe 210 from the blanking bin 100 towards the return pipe 220, and the return pipe 220 has an outlet for connecting the material conveying pipe 500. The material conveying pipe 500 is used for the processing and transportation of granular feed. The material moisture detection device 1000 of the present application can be separately set as a component and then installed on the material conveying pipe 500 of industrial and agricultural raw materials.

[0047] Exemplarily, Figure 5 In, the conveying screw 230 includes a main rod and screw blades. The screw blades are spaced along the length direction of the main rod, and the screw blades are spaced around the main body of the main rod and are in a spiral shape. The main rod can be arranged in a cubic shape, a cylindrical shape or other shapes, which are not specifically limited herein. The screw blades can be arranged in a fan shape, a circular shape, a triangular shape or other shapes, which are not specifically limited herein. Under the action of the conveying screw 230, the flow rate of the granular feed entering the conveying screw device 200 is consistent, so as to maintain a stable flow state, which is beneficial to ensuring the accuracy of the detection results of the detection device 300.

[0048] Further, one end of the main rod of the conveying screw 230 away from the return pipe 220 is connected with a screw control device. The screw control device can be a DC motor, an electromagnetic speed regulating motor, a variable frequency speed regulating motor, etc., which are not specifically limited herein. In actual operation, the rotational speed of the conveying screw 230 can be adjusted according to the feeding amount of the granular feed in the conveying pipe 210, so that at this rotational speed, the granular feed entering the conveying pipe 210 covers the detection device 300 under the push of the conveying screw 230 and maintains a stable flow state to ensure the accuracy of the detection results of the detection device 300. Specifically, during the process of the granular feed entering the conveying pipe 210, it may continuously accumulate and block in the conveying pipe 210. At this time, the conveying screw 230 changes the state of accumulation and blockage of the granular feed by rotating, disperses the granular feed and stably pushes the granular feed forward under the push of its own weight.

[0049] Further, a sealing plate is arranged between the conveying screw 230 and the screw control device. A through hole conforming to the size of the main rod of the conveying screw 230 is arranged on the sealing plate. The arrangement of the sealing plate can prevent the granular feed from flowing into the screw control device.

[0050] It should be noted that the cross-sections of the delivery pipe 210 and the return pipe 220 can be in other shapes such as a cube or a cylinder, which are not specifically limited here. The connection between the delivery pipe 210 and the material bin 100 and the return pipe 220 can be a fixed connection, such as welding, etc., or a detachable connection, such as a threaded connection, a snap connection, a flange connection, etc. The connection between the main rod and the spiral sheet of the delivery screw 230 is set with reference to the above-mentioned fixed connection method and the above-mentioned detachable connection method, which will not be repeated here.

[0051] See also Figure 2 and Figure 3 The detection device 300 includes a moisture detector 310, and a detection portion 311 of the moisture detector 310 is exposed in the return pipe 220. The moisture detector 310 can be a near-infrared moisture detector and a microwave moisture detector, etc., which are not specifically limited here. Preferably, the moisture detector is a microwave moisture detector. With such a configuration, under the push of the conveying screw 230, it can be ensured that the pellet feed covers the detection portion 311 of the moisture detector 310.

[0052] Through the above technical solution, the material moisture detection device 1000 is installed in the section where the moisture content of the pellet feed needs to be detected. Figure 5 As shown, the feed bin 100 is used to separate unstable pellet feeds and enter the conveying pipe 210. The pellet feeds are dispersed by rotating the conveying screw 230 and are stably conveyed to the return pipe 220 under the push of their own weight, so as to ensure that the pellet feeds form a stable material flow in the return pipe 220 equipped with the moisture detector 310, and ensure that the pellet feeds to be tested are stably covered on the detection part 311 of the moisture detector 310 per unit time, thereby improving the measurement accuracy of the moisture detector 310, and being able to realize online and real-time monitoring and control of the moisture parameters of the pellet feeds in the pipeline, and dynamically predict the moisture content of the product, so that the material moisture detection device 1000 has the function of being able to feedback the moisture parameters of the pellet feeds in real time and automatically adjust the relevant parameter settings of the processed materials.

[0053] It should be noted that the material moisture detection device 1000 further includes a control system (not shown in the figure). The control system can be communicatively connected to the moisture detector 310, or it can also be communicatively connected to the entire material conveying device including the material moisture detection device 1000. This communication connection can be a wired connection or a wireless connection, and no specific limitation is made here. With such a setting, the material moisture parameters detected by the moisture detector 310 can be real-time fed back to the control system, enabling online and real-time monitoring and control of the moisture parameters of the granular feed in the pipeline, dynamically predicting the product moisture content, and enabling the material moisture detection device 1000 to real-time feed back the granular feed moisture parameters and automatically adjust the relevant parameters for processing the material according to the feedback data.

[0054] Please refer to Figure 6 , the detection part 311 of the above moisture detector 310 is exposed to the return material pipeline 220 to detect the granular feed flowing in the return material pipeline 220. The detection part 311 is exposed to the return material pipeline 220 through the detection port 221 opened on the return material pipeline 220. There are various positions for opening the detection port 221. For example, it can be opened on the side wall, top or bottom of the return material pipeline 220.

[0055] In some embodiments of the present invention, a detection port 221 is opened at the bottom of the return material pipeline 220, and the detection part 311 of the moisture detector 310 extends into the return material pipeline 220 from the detection port 221. Since when the detection port 221 is opened on the side wall or top of the return material pipeline 220, the detection accuracy of the moisture detector 310 cannot be satisfied, which easily causes deviation in the moisture detection of the granular feed by the detection part 311. In view of this, opening the detection port 221 at the bottom of the return material pipeline 220 enables the granular feed to fully cover the detection port 221 when passing through the return material pipeline 220. At this time, the detection part 311 of the moisture detector 310 arranged at the detection port 221 can accurately detect the moisture of the granular feed covering the detection port 221.

[0056] Please refer to Figure 5 and Figure 6, the moisture detector 310 needs to be calibrated and calibrated in the following situations: when the moisture detector is used for the first time; after changing the placement position; when there is a large change in the working room temperature, after adjusting the horizontal position; when the pellet feed composition changes or after replacing the detected pellet feed. In order to facilitate the calibration and calibration of the moisture detector 310, a sampling port 222 is provided on the return pipe 220. The number of sampling ports 222 can be one or more, and no specific limitation is made here. The calibration and calibration of the moisture detector refer to the moisture determination of the same sample by the moisture detector and laboratory detection respectively. The accuracy of the laboratory detection result is high. Taking the laboratory detection result as the standard reference value, comparing the detection results of the moisture detector sample and the laboratory method sample, and calibrating and calibrating the moisture detector. Therefore, the moisture detector 310 installed at the return pipe 220 can be calibrated and calibrated by using the sampling port 222. Specifically, when the moisture detector 310 detects the moisture of the pellet feed covering it, the detection result is the result of the moisture detector sample. The same sample being detected by the moisture detector 310 at this time is taken out through the sampling port 222 and sent to the laboratory for moisture determination. The detection result is the detection result of the laboratory method sample. Comparing the detection results of the two samples can calibrate and calibrate the moisture detector 310. The number of times of this determination and comparison can be repeated 3 times or more, and no specific limitation is made here.

[0057] Considering that poor sampling will lead to abnormal calibration and calibration results. In some implementations, such as Figure 1 , 6As shown, an automatic sampling device 400 is further provided to extract pellet feed from the return material pipeline 220 through the sampling port 222. The automatic sampling device 400 includes a sampling pipeline 410, a sampler 420, and a driving device 430. The sampling pipeline 410 is communicated with the sampling port 222. The sampler 420 is connected to the driving device 430, and the driving device 430 is used to drive the sampler 420 to enter the sampling port 222 through the sampling pipeline 410. The driving device can be an electric driving device, a pneumatic driving device, a hydraulic driving device, etc., and no specific limitation is made here. With such a setting, it can ensure the consistency between the samples of the moisture detector and the laboratory method samples when calibrating and calibrating the moisture detector, making the comparison between the moisture detection results of the moisture detector samples and the laboratory method samples more reliable, the standard reference value more accurate, and improving the accuracy of the calibration and calibration results. To improve the accuracy of the calibration and calibration results of the moisture detector 310, the position of the sampling port 222 needs to be set so that when the sampler 420 enters, it can just take samples that meet the following requirements: pellet feed that is exactly at the detection position that can be detected by the detection part 311 of the moisture detector 310, pellet feed that is about to flow to the detection part 311 for detection, or pellet feed that has just been detected by the detection part 311. Exemplarily, in some embodiments, along the axial direction of the return material pipeline 220, the sampling port 222 is arranged on one side of the detection port 221, and the vertical height of the sampling port 222 from the bottom of the return material pipeline 220 is not less than the minimum detection distance of the moisture detector 310. Different models of the moisture detector 310 have different minimum detection distances. The specific minimum detection distance of the moisture detector 310 is determined according to the model and specific instrument settings of the moisture detector 310, and no specific limitation is made here. With such a setting, the pellet feed will fill the space of the return material pipeline 220 during transportation in the return material pipeline 220. When the automatic sampling device 400 samples through the sampling port 222, it can ensure that the sampler 420 can extend into the pellet feed for sampling under the action of the driving device 430. At the same time, the sampling port 222 is arranged on one side of the detection port 311, and the height of the sampling port 222 is restricted so that when the sampler 420 samples through the sampling port 222, it can just take that part of the pellet feed that can cover the detection port 311 and be detected by the moisture detector 310 during flow, which is used as the laboratory method sample, ensuring the consistency between the moisture detector samples and the laboratory method samples during the calibration and calibration of the moisture detector, that is, the actually detected samples and the samples used for calibration and calibration are the same, which is beneficial to the calibration and calibration of the moisture detector 310 and improves the accuracy of the detection results of the moisture detector 310.

[0058] It should be noted that the connection method between the return material pipeline 220 and the sampling pipeline 410 through the sampling port 222 is set with reference to the above fixed connection method and the above detachable connection method, and will not be elaborated here one by one.

[0059] The driving device 430 drives the sampler 420 to move back and forth along the axial direction of the sampling pipeline 410, so as to enable the sampler 420 to take out the granular feed in the return pipeline 220.

[0060] Please refer to Figure 6 , the sampler 420 is built into the sampling pipeline 410. The sampler 420 includes a sampling handle 421 and a sampling groove 422. One end of the sampling handle 421 is connected to the sampling groove 422, and the other end of the sampling handle 421 is connected to the driving device 430. The sampling handle can be arranged towards the pipe orifice of the sampling pipeline, which is convenient for the sampling groove to pass through the sampling port and is also convenient for the connection between the sampling groove and the driving device. Preferably, the sampling groove 422 has a wheel-shaped part and a cross bar. The two ends of the cross bar are respectively vertically connected to the wheel-shaped part, and the diameter of the wheel-shaped part is smaller than the diameter of the return pipeline. The wheel-shaped part and the cross bar of the sampling groove 422 can be integrally formed in a roller shape or can be connected in a split manner, and no specific limitation is made here. Exemplarily, the wheel-shaped part and the cross bar of the sampling groove 422 are integrally formed in a roller shape. The sampling groove 422 extends into the material flow under the drive of the driving device 430, and the granular feed covers the entire roller-shaped sampling groove 422. Subsequently, the sampling groove 422 is pulled out of the return pipeline 220 by the driving device 430, and the taken-out granular feed enters the sampling pipeline 410. At this time, the granular feed falls through the open mouth at the bottom of the sampling groove 422. With such an arrangement, the granular feed can be pulled out by inertia, and the sampling groove 422 can achieve simple and fast sampling through reciprocating motion.

[0061] Furthermore, the sampler 420 further includes a sample dropping pipe 440. One end of the sample dropping pipe 440 is connected and communicated with the sampling pipeline 410 to form a sample receiving port. The granular feed falling through the open mouth at the bottom of the sampling groove 422 can enter the sample dropping pipe 440 through the sample receiving port.

[0062] In other embodiments, the sampling groove 422 is arranged to be driven to flip, so as to pour the obtained laboratory method sample into the sample dropping pipe 440.

[0063] Furthermore, the sampler 420 further includes a sampling bag (not shown in the figure). The other end of the sample dropping pipe 440 is detachably connected to the sampling bag, and the granular feed enters the sampling bag through the sample dropping pipe 440. The material of the sampling bag can be plastic, cloth, rubber, etc., and no specific limitation is made here. The enclosed space between the sampling bag and the sample dropping pipe 440 can prevent the sample from flying and splashing during falling sampling, which is convenient for transferring the obtained sample and performing laboratory sample detection.

[0064] Please refer to Figure 2 and Figure 4, considering that during the transportation of the pellet feed in the return pipeline 220, a stable flow state needs to be maintained, the degree of up-and-down inclination of the return pipeline 220 along the movement direction of the pellet feed will affect the stable state of the material flow. In view of this, in order to maintain the stable state of the material flow when moisture detection is carried out in the return pipeline 220, in some embodiments of the present invention, the return pipeline 220 is obliquely arranged relative to the horizontal plane, and the outlet of the return pipeline 220 is located at the upper end of the return pipeline 220. With this setting, the pellet feed will not slide under the action of gravity in the return pipeline 220, but completely rely on the rotation of the conveying screw 230 to move in the return pipeline 220, making the conveying state of the pellet feed controllable and stable, and improving the measurement accuracy of the moisture detector 310.

[0065] The present invention also proposes a material conveying system 2000 with an on-line material moisture detection function. The material conveying system 2000 with an on-line material moisture detection function includes the above-mentioned material moisture detection device 1000 and a material conveying pipeline 500. The feed inlet of the blanking bin 100 is communicated with the material conveying pipeline 500, and the outlet of the return pipeline 220 is communicated with the material conveying pipeline 500.

[0066] It should be noted that in the actual application process, the material moisture detection device 1000 can be fixedly installed on the material conveying pipeline 500 alone. The connection methods of the blanking bin 100 and the return pipeline 220 of the material moisture detection device 1000 with the material conveying pipeline 500 are set with reference to the above-mentioned fixed connection method and the above-mentioned detachable connection method, and no specific limitation is made here.

[0067] Through the above technical solutions, the detected pellet feed can be sent back to the material conveying pipeline 500 again, avoiding waste of the pellet feed.

[0068] The specific structure of the material moisture detection device 1000 refers to the above embodiments. Since the material conveying system 2000 with an on-line material moisture detection function adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.

[0069] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the description and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A material moisture detection device, characterized in that, The material moisture detection device includes: A blanking bin for receiving the material in the material conveying pipeline that conveys the material; A conveying screw device, which includes a conveying pipeline, a return material pipeline and a conveying screw. The conveying pipeline connects the blanking bin with the return material pipeline. The conveying screw is disposed inside the conveying pipeline. The conveying screw is used to convey the material entering the conveying pipeline from the blanking bin into the return material pipeline. The return material pipeline has an outlet for connecting to the material conveying pipeline, and a detection port is opened at the bottom of the return material pipeline; A detection device, which includes a moisture detector. The detection part of the moisture detector extends into the return material pipeline from the detection port; An automatic sampling device. A plurality of sampling ports are opened on the return material pipeline. One of the sampling ports is used to face the pellet feed at the detection position of the detection part, one of the sampling ports is used to face the pellet feed flowing towards the detection part to be detected, and one of the sampling ports is used to face the pellet feed that has just been detected by the detection part. The automatic sampling device is used to extract the material from the return material pipeline through the sampling port; The automatic sampling device includes a sampling pipeline, a sampler and a driving device. The sampling pipeline is communicated with the sampling port. The sampler is connected to the driving device. The driving device is used to drive the sampler to enter the sampling port through the sampling pipeline. The sampler is disposed inside the sampling pipeline; The sampler includes a sampling handle and a sampling groove. One end of the sampling handle is connected to the sampling groove, and the other end of the sampling handle is connected to the driving device. The sampling groove has a wheel-shaped member and a cross bar. The two ends of the cross bar are respectively vertically connected to the wheel-shaped member. The diameter of the wheel-shaped member is smaller than the diameter of the return material pipeline; 2. The material moisture detection device according to claim 1, wherein, The return material pipeline is obliquely arranged relative to the horizontal plane, and the outlet of the return material pipeline is located at the upper end of the return material pipeline; 3. The material moisture detection device according to claim 1, characterized in that, Along the axial direction of the return material pipeline, the sampling port is arranged on one side of the detection port, and the vertical height of the sampling port from the bottom of the return material pipeline is not less than the minimum detection distance of the moisture detector; 4. A material conveying system with an online moisture detection function for materials, characterized in that, Including: A material conveying pipeline; The material moisture detection device according to any one of claims 1-3, wherein the feed inlet of the blanking bin is communicated with the material conveying pipeline, and the outlet of the return material pipeline is communicated with the material conveying pipeline.

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