Moisture on-line detection device

Abstract

The application relates to an online water content detection device, which comprises a sampling module, a detection module and a control module. The sampling module comprises a sampling unit and a first driving unit. The fixed end of the first driving unit is arranged in a lower hopper and is used for driving the sampling unit to move along the width direction of a conveying belt. The detection module comprises a shell unit and a detection unit. The shell unit comprises a baffle, a second driving unit and a detection shell. The detection shell is arranged in the lower hopper and is connected with the sampling unit through an extension tube. The fixed end of the second driving unit is arranged in the detection shell, and the output end is connected with the baffle and is used for driving the baffle to cover or expose the lower opening of the detection shell. The control module is in communication connection with the first driving unit, the second driving unit and the detection unit. When the sampling unit moves to a set position, the control module controls the first driving unit to stop, controls the second driving unit to drive the baffle to cover the lower opening of the detection shell, and obtains the water content of the material collected by the detection unit after the material is accumulated to a set amount, so that automatic material detection at different positions is realized.

Description

Technical Field

[0001] This application relates to the field of online monitoring technology, and in particular to online moisture detection devices. Background Technology

[0002] Belt dryers consist of a drying unit, a conveyor belt, and a hopper. During drying, the material is evenly distributed on the conveyor belt and transported to the drying unit for drying. After drying, the material is discharged from the hopper. They can dry materials in large quantities and continuously, and are widely used in industries such as chemical, food, pharmaceutical, building materials, and electronics.

[0003] In material drying production, the moisture content of the material determines product quality. Excessive moisture leads to spoilage during storage, while insufficient moisture causes losses for the enterprise. On the other hand, material moisture content reflects the drying effect and is an important indicator of belt dryer performance. During the drying process, the operating parameters of the belt dryer are adjusted based on the moisture content of the dried material to control product quality.

[0004] Currently, there are two main methods for detecting material moisture content: 1) Manual measurement, where operators take samples at different positions on the conveyor belt and then feed the results back to the drying equipment controller. However, this method is labor-intensive, costly, and cannot meet the requirements of intelligent, unmanned factories. Furthermore, there is a delay in adjusting control parameters based on the feedback results, which affects product quality. 2) Online detection, for example, patent CN212111195U uses an online detection device installed in the material chute at the rear outlet of the belt dryer to detect material moisture content. However, this method only detects the mixed material at the outlet of the belt dryer and cannot detect the moisture content of materials at different positions on the conveyor belt separately. Summary of the Invention

[0005] Based on this, an online moisture detection device is provided, which can realize the online automatic detection of material moisture at different locations, facilitating intelligent and unmanned operation and timely adjustment of belt dryer control parameters.

[0006] This application provides an online moisture detection device, installed in the feed hopper of a belt dryer, comprising:

[0007] The sampling module includes a sampling unit and a first driving unit. The fixed end of the first driving unit is located in the hopper, and the output end is connected to the sampling unit. It is used to drive the sampling unit to move along the width direction of the conveyor belt of the belt dryer. The sampling unit is used to receive the falling material.

[0008] The detection module includes a housing unit and a detection unit. The housing unit includes a baffle, a second drive unit, and a detection shell with openings at both ends. The detection shell is disposed inside the hopper, and its upper opening is connected to the sampling unit via a telescopic tube. The fixed end of the second drive unit is disposed in the detection shell, and its output end is connected to the baffle, for driving the baffle to cover or expose the lower opening of the detection shell. The detection unit is disposed in the detection shell and is used to detect the moisture content of the material inside the detection shell.

[0009] The control module is communicatively connected to the first drive unit, the second drive unit, and the detection unit, respectively. It is used to control the first drive unit to stop when the sampling unit moves to a set position, and the second drive unit to drive the baffle to cover the lower opening of the detection shell. After the material accumulates to a set amount, it acquires the material moisture data collected by the detection unit.

[0010] In the aforementioned online moisture detection device, when material moisture detection is required, the control module sends an action signal to the first drive unit. The first drive unit moves the sampling unit along the width of the conveyor belt to a set position, and at this time, the telescopic tube deforms to maintain communication between the sampling unit and the detection shell. After the sampling unit moves to the set position, the control module sends a stop signal to the first drive unit, and the first drive unit and the sampling unit stop. Simultaneously, the control module sends an action signal to the second drive unit, and the second drive unit moves a baffle to cover the lower opening of the detection shell. At this time, the material falling from the conveyor belt passes through the sampling unit, the telescopic tube, and the detection shell in sequence, and then falls onto the baffle. After accumulating to a set amount in the detection shell, the control module... The first drive unit acquires the material moisture data collected by the detection unit, and the material moisture detection at a set location is completed. After completing one detection, the control module sends a response signal to the second drive unit, which moves the baffle to expose the lower opening of the detection shell. At this time, the material accumulated in the detection shell falls into the hopper from the lower opening of the detection shell, so as to facilitate subsequent material detection at different set locations. The first drive unit can realize the automatic switching of the sampling unit between different set locations. The material moisture detection at each set location is automatic sampling and detection without manual operation, which is conducive to realizing intelligent and unmanned operation. Moreover, it can provide timely feedback on the detection results, which is convenient for adjusting the control parameters of the belt dryer.

[0011] In one embodiment, the first drive unit includes a first motor, two pulleys, a timing belt, and a mounting base. The first motor and the mounting base are spaced apart on the hopper along the width direction of the conveyor belt and are communicatively connected to the control module. One pulley is mounted on the output end of the first motor, and the other pulley is rotatably mounted on the mounting base. The timing belt is wound around the two pulleys, and the sampling unit is fixed thereon.

[0012] In one embodiment, the first motor is a geared motor, and the online moisture detection device further includes a position acquisition module. The position acquisition module is located in the hopper and is used to acquire and transmit the position of the sampling unit. The control module is communicatively connected to the position acquisition module and is used to determine whether the sampling unit has moved to a set position based on the received position of the sampling unit.

[0013] In one embodiment, the position acquisition module includes multiple position sensors, which are spaced apart on the hopper along the bandwidth of the conveyor belt and are respectively communicatively connected to the control module.

[0014] In one embodiment, the sampling module further includes a guiding unit, which includes a guide rail and a slider. The guide rail is disposed in the hopper along the bandwidth direction of the conveyor belt. One end of the slider is slidably connected to the guide rail, and the other end is fixedly connected to the synchronous belt. The sampling unit is fixed to the slider.

[0015] In one embodiment, the sampling unit includes a sampling tube, a sleeve, and a positioning block. The sampling tube is a tubular structure with openings at both ends, and one end is connected to the telescopic tube. The sleeve is fitted onto the sampling tube and connected to the slider. The positioning block is installed on the side of the sleeve near the position sensor and cooperates with the position sensor.

[0016] In one embodiment, the detection shell includes a first shell and two first side plates. The first shell is a cavity structure with openings at both ends, and one end of the opening forms a connecting circular tube for connection with a telescopic tube. The two first side plates are arranged opposite to each other and fixed inside the first shell. The two first side plates cooperate with a part of the inner wall of the first shell to form a funnel-shaped flow channel for material passage, and cooperate with another part of the inner wall of the first shell to form a first installation space. The detection unit is located in the first installation space and is connected to the detection shell.

[0017] In one embodiment, the detection unit is a direct contact sensor, and the areas of the two first side plates corresponding to the first mounting space each have a first opening for exposing the detection unit; or,

[0018] The detection unit is an indirect contact sensor. The first side plate is made of non-metallic material. Alternatively, the areas of the two first side plates corresponding to the first installation space are respectively provided with second openings and covered by non-metallic cover plates.

[0019] In one embodiment, the second drive unit includes a rotary cylinder, a cylinder seat, a bushing, a swing shaft, and two first bearings. The cylinder body of the rotary cylinder is mounted on the first housing via the cylinder seat, and the extension shaft is connected to the swing shaft via the bushing. The swing shaft extends into and is mounted on the first housing via the two first bearings. The baffle is connected to the swing shaft.

[0020] In one embodiment, the online moisture detection device further includes a material level sensor, which is disposed above the first housing and is communicatively connected to the control module for acquiring and conveying the amount of material accumulated in the flow channel to the control module. Attached Figure Description

[0021] Figure 1 This is a front view of a belt dryer in operation according to an embodiment of this application.

[0022] Figure 2 This is a top view of the module consisting of an online moisture detection device and a feeding hopper provided in an embodiment of this application.

[0023] Figure 3 The left view shows the module consisting of an online moisture detection device and a hopper provided in an embodiment of this application.

[0024] Figure 4 for Figure 1 A cross-sectional view of the medium belt dryer at position AA.

[0025] Figure 5 This is a schematic diagram of the sampling module provided in one embodiment of this application.

[0026] Figure 6 This is a schematic diagram of the structure of a detection module provided in one embodiment of this application.

[0027] Figure 7 for Figure 6 A cross-sectional view of the detection module.

[0028] Figure 8 This is a schematic diagram of the detection module provided in another embodiment of this application.

[0029] Figure 9 for Figure 8 The main view of the detection module.

[0030] Figure 10 for Figure 9 A cross-sectional view of the detection module at the BB position.

[0031] Figure 11 for Figure 9 A cross-sectional view of the detection module at the CC position.

[0032] Figure label:

[0033] 01. Belt dryer;

[0034] 10. Online moisture detection device;

[0035] 100. Sampling module; 110. Sampling unit; 111. Sampling tube; 112. Sleeve plate; 113. Positioning block; 120. First drive unit; 121. First motor; 122. Drive pulley; 123. Driven pulley; 124. Synchronous belt; 125. Mounting base; 126. Driven shaft; 130. Guide unit; 131. Guide rail; 132. Slider; 140. Mounting plate;

[0036] 200. Detection module; 210. Housing unit; 211. Baffle; 212. Second drive unit; 2121. Rotary cylinder; 2122. Cylinder seat; 2123. Bushing; 2124. Swing shaft; 2125. First bearing; 213. Detection shell; 2131. First housing; 2131a. Connecting round tube; 2131b. First sheet metal part; 2131c. Front plate; 2131d. Manual sampling port; 2132. First side plate; 2132a. First opening; 2132b. Second opening; 2133. First mounting space; 2134. Flow channel; 220. Detection unit; 221. Direct contact sensor; 222. Indirect contact sensor;

[0037] 300. Telescopic tube;

[0038] 400. Position acquisition module; 410. Position sensor;

[0039] 500. Install the cover;

[0040] 600. Non-metallic cover plate;

[0041] 700. Sampling plate;

[0042] 800. Level sensor;

[0043] 20. Feed hopper;

[0044] 30. Conveyor belt; X, first direction; Y, second direction; Z, third direction;

[0045] 02. Materials. Detailed Implementation

[0046] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0047] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0048] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0052] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, this application provides an online moisture detection device 10, applied in a belt dryer 01. The online moisture detection device 10 is mounted on the hopper 20 and is used to detect the moisture content of the material 02 falling from the discharge position of the conveyor belt 30 into the hopper 20. For ease of description, the width direction of the conveyor belt 30 is defined as the first direction X, the length direction of the conveyor belt 30 as the second direction Y, and the vertical direction as the third direction Z. The first direction X, the second direction Y, and the third direction Z are all perpendicular to each other. The online moisture detection device 10 includes a sampling module 100, a detection module 200, and a control module. The sampling module 100 is located above the detection module 200 along the third direction Z. The control module is communicatively connected to the sampling module 100 and the detection module 200 via cables or other means.

[0053] Please refer to the above. Figure 5 The sampling module 100 includes a sampling unit 110 and a first driving unit 120. The fixed end of the first driving unit 120 is located in the hopper 20, and the output end of the first driving unit 120 is connected to the sampling unit 110. The first driving unit 120 is used to provide driving force for the sampling unit 110 to move along the first direction X. The sampling unit 110 is driven by the output end of the first driving unit 120 and can move along the first direction X, so that the sampling unit 110 switches different positions in the bandwidth direction of the conveyor belt 30. The sampling unit 110 is used to receive material O2 falling from different positions on the conveyor belt 30.

[0054] The first drive unit 120 can have various structural forms, including a motor + lead screw structure, a motor + gear and rack structure, and a cylinder. To facilitate control of the movement accuracy of the sampling unit 110, such as... Figure 5 As shown, in a preferred embodiment, the first drive unit 120 includes a first motor 121, two pulleys, a synchronous belt 124, and a mounting base 125. The first motor 121 and the mounting base 125 are spaced apart along a first direction X on the hopper 20. The first motor 121 is communicatively connected to a control module. The driving pulley 122 of the two pulleys is mounted to the output end of the first motor 121 by means of threaded connection, snap-fit ​​connection, or concave-convex fit. The driven pulley 123 is mounted on the mounting base 125 and can rotate relative to the mounting base 125. The synchronous belt 124 is wound around the driving pulley 122 and the driven pulley 123, and a sampling unit 110 is fixed on the synchronous belt 124. In a specific configuration, a driven shaft 126 is mounted on the mounting base 125 by means of threaded connection, snap-fit ​​connection, or concave-convex fit. The driven pulley 123 is rotatably connected to the driven shaft 126 by means of bearings or the like. In actual operation, the control module sends an action signal to the first motor 121, the output end of the first motor 121 rotates, driving the drive pulley 122 to rotate, which in turn drives the synchronous belt 124 to rotate. The synchronous belt 124 drives the sampling module 100 to move along the first direction X, changing the position of the sampling unit 110 in the bandwidth direction of the conveyor belt 30.

[0055] Depending on the type of the first motor 121, the movement accuracy control method of the sampling unit 110 also changes. When the first motor 121 is a stepper motor, since the stepper motor has the characteristic of converting electrical pulse signals into corresponding linear displacement, high-precision movement of the sampling unit 110 can be achieved by setting the corresponding control points in the control module. However, when the first motor 121 is a geared motor, as shown in the figure... Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown in Figure 5, the online moisture detection device 10 also includes a position acquisition module 400. The position acquisition module 400 is mounted on the hopper 20 and is communicatively connected to the control module. The position acquisition module 400 is used to acquire the position of the sampling unit 110 and sends the acquired position information to the control module. The control module compares the received position information with preset standard position information to determine whether the sampling unit 110 has moved to the set position.

[0056] The location acquisition module 400 can have various structural forms, including image acquisition structures such as cameras, and sensor structures such as... Figure 2As shown, in a preferred embodiment, the position acquisition module 400 includes multiple position sensors 410, which are spaced apart along a first direction X on the hopper 20, and each position sensor 410 is communicatively connected to the control module. In specific configurations, the number of position sensors 410 can be two, three, four, or more. The position sensors 410 can be photoelectric sensors or other forms that meet the requirements. During operation, when the synchronous belt 124 moves the sampling unit 110 to face the position sensor 410, the position sensor 410 acquires a position signal of the sampling unit 110 and sends this signal to the control module. The control module determines that the sampling unit 110 has moved to a set position based on this position signal and sends a control signal to the first motor 121.

[0057] To ensure the stable movement of the sampling unit 110, in a preferred embodiment, such as... Figure 5 As shown, the sampling module 100 also includes a guide unit 130, which includes a guide rail 131 and a slider 132. The guide rail 131 is disposed in the hopper 20 along the first direction X. In specific settings, the number of guide units 130 can be one or two sets. The guide rail 131 can be directly installed in the hopper 20 by means of threaded connection, convex-concave fit, snap-fit ​​connection, etc. The guide rail 131 can also be fixed in the hopper 20 by two mounting plates 140. At this time, the first drive unit 120 and the position acquisition module 400 can also be disposed on the mounting plate 140. The sampling module 100 can be fixed in the hopper 20 relatively conveniently and quickly by means of two mounting plates 140. One end of the slider 132 along the second direction Y is slidably connected to the guide rail 131, and the other end of the slider 132 along the second direction Y is fixedly connected to the synchronous belt 124 by means of embedding, convex-concave fit, etc. The sampling unit 110 is fixed to the slider 132. In actual operation, the guide rail 131 guides the movement of the slider 132. The slider 132 drives the sampling unit 110 to move along the first direction X. The slider 132 is limited by the guide rail 131, which drives the sampling unit 110 to move stably, thereby improving the reliability of the movement of the sampling unit 110.

[0058] The sampling unit 110 can have various structural forms. It can be a tubular structure open at both ends, but for easier integration with the position sensor 410, it can be configured as follows: Figure 5As shown, in a preferred embodiment, the sampling unit 110 includes a sampling tube 111, a sleeve plate 112, and a positioning block 113. The sampling tube 111 is a tubular structure with openings at both ends, and one end of the sampling tube 111 is connected to the telescopic tube 300 by means of threaded connection, convex-concave fit, snap-fit ​​connection, etc. The other end of the sampling tube 111 is used to receive the material 02 falling from the conveyor belt 30. The sleeve plate 112 is sleeved on the sampling tube 111, and the sleeve plate 112 is connected to the slider 132 by means of threaded connection, convex-concave fit, snap-fit ​​connection, etc. The positioning block 113 is installed on the side of the sleeve plate 112 near the position sensor 410 by means of threaded connection, convex-concave fit, snap-fit ​​connection, etc., and the positioning block 113 cooperates with the position sensor 410. In actual operation, when the position sensor 410 collects a position signal that the positioning block 113 has moved to a position directly opposite it, the control module can determine that the sampling unit 110 has moved to the set position based on this position signal, so as to realize the position detection of the sampling unit 110. In specific settings, the sampling tube 111, the sleeve 112, and the positioning block 113 can be a separate structure or an integrated structure, and can be manufactured by casting, injection molding, or other methods.

[0059] like Figure 3 , Figure 4 , Figure 6 as well as Figure 7 As shown, the detection module 200 includes a housing unit 210 and a detection unit 220. The housing unit 210 includes a baffle 211, a second drive unit 212, and a detection shell 213. The detection shell 213 is installed inside the hopper 20 and has openings at both ends along the third direction Z. The upper opening of the detection shell 213 is connected to the sampling unit 110 through a telescopic tube 300. The fixed end of the second drive unit 212 is located on the detection shell 213, and the output end of the second drive unit 212 is connected to the baffle 211. The second drive unit 212 is used to provide the driving force for the baffle 211 to switch between covering the lower opening of the detection shell 213 and exposing the lower opening of the detection shell 213. The baffle 211 is driven by the output end of the second drive unit 212 and can move accordingly, so that the baffle 211 covers the lower opening of the detection shell 213 or the baffle 211 exposes the lower opening of the detection shell 213. The detection unit 220 is installed on the detection housing 213, and the detection unit 220 is used to detect the moisture content of the material 02 inside the detection housing 213.

[0060] The detection shell 213 has various structural forms, such as Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 as well as Figure 11As shown, in a preferred embodiment, the detection shell 213 includes a first shell 2131 and two first side plates 2132. The first shell 2131 is a cavity structure with openings at both ends, and one end of the first shell 2131 is opened to form a connecting round tube 2131a. The connecting round tube 2131a is connected to the telescopic tube 300 by means of threaded connection, anti-convex and anti-recessed fit, snap-fit ​​connection, etc. Two first side plates 2132 are arranged opposite to each other and are fixed inside the first housing 2131 by welding, threaded connection, bonding or other means. The two first side plates 2132 cooperate with a part of the inner wall of the first housing 2131 to form a funnel-shaped flow channel 2134. The flow channel 2134 is used for the passage and accumulation of material 02, which facilitates the detection of the detection unit 220. The two first side plates 2132 cooperate with another part of the inner wall of the first housing 2131 to form a first installation space 2133. The detection unit 220 is located in the first installation space 2133, and the detection unit 220 and the detection housing 213 can be directly fixedly connected by threaded connection, convex and concave fit, bonding or other means. The detection unit 220 can also be fixed on the first side plate 2132 by the installation cover 500. In specific configuration, the first side plate 2132 can be made of sheet metal bent at a set angle, and the first housing 2131 can be composed of a connecting round tube 2131a, a first sheet metal part 2131b, and a front plate 2131c. The first sheet metal part 2131b is bent into a top plate and three side plates. The top plate has an opening and is connected to the connecting round tube 2131a. The front plate 2131c is fixed to the hopper 20 by means of threaded connection, convex-concave fit, etc. Of course, the structural form of the detection housing 213 is not limited to this, and can also be other structural forms that meet the requirements.

[0061] The detection unit 220 can have various structural forms. In a preferred embodiment, the detection unit 220 can be a sensor to facilitate accurate detection of the O2 moisture content of the material. Different sensor selections for the detection unit 220 result in certain differences in the detection module 200. Figure 6 as well as Figure 7 As shown, when the detection unit 220 is a direct contact sensor 221, the areas corresponding to the first mounting space 2133 in the two first side plates 2132 are respectively provided with first openings 2132a. The first openings 2132a are used to expose the detection unit 220. At this time, the first mounting space 2133 is connected to the flow channel 2134, and the direct contact sensor 221 can directly contact the material 02 to detect moisture. Figure 8 , Figure 9 , Figure 10 as well as Figure 11As shown, when the detection unit 220 is an indirect contact sensor 222, the first installation space 2133 and the flow channel 2134 are not connected, the indirect contact sensor 222 does not contact the material 02, and the moisture of the material 02 is detected indirectly. In order to ensure the normal operation of the detection, the first side plate 2132 is made of non-metallic material, or, the areas of the two first side plates 2132 corresponding to the first installation space 2133 are respectively provided with second openings 2132b and the second openings 2132b are covered by non-metallic cover plates 600.

[0062] For ease of calibration of the detection unit 220, please refer to the following: Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 as well as Figure 11 The first housing 2131 has a manual sampling port 2131d, and a sampling plate 700 is inserted into the manual sampling port 2131d. The sampling plate 700 is movably set in the manual sampling port 2131d. When the detection unit 220 needs to be calibrated, the sampling plate 700 is manually removed, and the material 02 is sampled and tested from the manual sampling port 2131d. The test result is compared with the moisture result obtained by the detection unit 220 for subsequent calibration. After the calibration is completed, the sampling plate 700 is manually inserted, and the material 02 still falls from the flow channel 2134.

[0063] The second drive unit 212 can have various structural forms, including a stepper motor, a motor + gear mechanism, and a telescopic cylinder. However, to facilitate control of the movement accuracy of the baffle 211 and simplify the structure, such as... Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 as well as Figure 11As shown, in a preferred embodiment, the second drive unit 212 includes a rotary cylinder 2121, a cylinder seat 2122, a bushing 2123, a swing shaft 2124, and two first bearings 2125. The cylinder body of the rotary cylinder 2121 is mounted on the first housing 2131 via the cylinder seat 2122, and the extension shaft of the rotary cylinder 2121 is connected to the swing shaft 2124 via the bushing 2123. The swing shaft 2124 extends into the first housing 2131 and is mounted on the first housing 2131 via the two first bearings 2125. The baffle 211 is fixed to the swing shaft 2124 by means of threaded connection, welding, pin connection, etc. In specific configurations, the first bearings 2125 can be rotary bearing seats or other structural forms that meet the requirements. In actual operation, the control module sends an action signal to the rotary cylinder 2121, causing the extension shaft of the rotary cylinder 2121 to rotate, which in turn drives the bushing 2123 and the swing shaft 2124 to rotate, thereby causing the baffle 211 to rotate as well. The state between the baffle 211 and the lower opening of the first housing 2131 changes, thus enabling the baffle 211 to switch between covering or exposing the lower opening of the first housing 2131. When the baffle 211 exposes the lower opening of the first housing 2131, the material 02 falls directly through the first housing 2131. When the baffle 211 covers the lower opening of the first housing 2131, the material 02 accumulates on the baffle 211.

[0064] The amount of material 02 accumulated on the baffle 211 can be calculated based on the time the baffle 211 covers the lower opening of the first shell 2131. To facilitate accurate determination of the amount of material 02 accumulated, such as... Figure 6 , Figure 8 as well as Figure 9 As shown, in a preferred embodiment, the online moisture detection device 10 further includes a level sensor 800. The level sensor 800 is disposed above the first housing 2131 and is communicatively connected to the control module. The level sensor 800 is used to acquire the accumulation amount of material 02 in the flow channel 2134 and transmit the accumulation amount information of material 02 to the control module. In specific settings, the level sensor 800 can be a photoelectric sensor or other forms that meet the requirements. In specific operation, when the material 02 accumulates on the baffle 211 to a height reaching the level sensor 800 in the Z direction, the level sensor 800 sends the material 02 arrival information to the control module.

[0065] The control module can take various structural forms, including PLC (Programmable Logic Controller), PCB (Printed Circuit Board), and other suitable structures. The control module controls the operation of the first drive unit 120. When the sampling unit 110 is moved to a set position by the output of the first drive unit 120, the control module stops the first drive unit 120. At this time, the control module also controls the second drive unit 212 to operate, causing the baffle 211 to cover the lower opening of the detection shell 213 by the output of the second drive unit 212. After a set amount of material 02 has accumulated, the control module promptly and accurately acquires the moisture data of the material 02 collected by the detection unit 220. Furthermore, the control module can feed back the moisture data of the material 02 to the operator of the belt dryer 01 for adjusting control parameters to ensure that the moisture content of the material 02 remains within a reasonable range.

[0066] When the moisture content of material 02 needs to be detected, the control module of the aforementioned online moisture detection device 10 sends an action signal to the first drive unit 120. The first drive unit 120 drives the sampling unit 110 to move along the first direction X to a set position. At this time, the telescopic tube 300 deforms to keep the sampling unit 110 and the detection shell 213 connected. After the sampling unit 110 moves to the set position, the control module sends a stop signal to the first drive unit 120, and the first drive unit 120 and the sampling unit 110 stop. At the same time, the control module sends an action signal to the second drive unit 212, and the second drive unit 212 drives the baffle 211 to cover the lower opening of the detection shell 213. At this time, the material 02 falling from the conveyor belt 30 passes through the sampling unit 110, the telescopic tube 300, and the detection shell 213 in sequence and falls onto the baffle 211, and is then stored inside the detection shell 213. After the material accumulates to a set amount, the control module acquires the moisture data of the material O2 collected by the detection unit 220, and the moisture detection of the material O2 at a set position is completed. After completing one detection, the control module sends a response signal to the second drive unit 212, which drives the baffle 211 to move to expose the lower opening of the detection shell 213. At this time, the material O2 accumulated in the detection shell 213 falls from the lower opening of the detection shell 213 into the feed hopper 20, so as to facilitate subsequent detection of material O2 at different set positions. The first drive unit 120 can realize the automatic switching of the sampling unit 110 between different set positions. The moisture detection of material O2 at each set position is automatic sampling and detection without manual operation, which is conducive to realizing intelligent and unmanned operation. Moreover, it can provide timely feedback on the detection results, which is convenient for adjusting the control parameters of the belt dryer 01.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An online moisture detection device, installed in the feed hopper of a belt dryer, characterized in that, include: The sampling module includes a sampling unit and a first driving unit. The fixed end of the first driving unit is located in the hopper, and the output end is connected to the sampling unit. It is used to drive the sampling unit to move along the width direction of the conveyor belt of the belt dryer. The sampling unit is used to receive the falling material. The detection module includes a housing unit and a detection unit. The housing unit includes a baffle, a second drive unit, and a detection shell with openings at both ends. The detection shell is disposed inside the hopper, and its upper opening is connected to the sampling unit through a deformable telescopic tube. The fixed end of the second drive unit is disposed in the detection shell, and its output end is connected to the baffle, for driving the baffle to cover or expose the lower opening of the detection shell. The detection unit is disposed in the detection shell and is used to detect the moisture content of the material inside the detection shell. The control module is communicatively connected to the first drive unit, the second drive unit, and the detection unit, respectively. It is used to control the first drive unit to stop when the sampling unit moves to a set position, and the second drive unit to drive the baffle to cover the lower opening of the detection shell. After the material accumulates to a set amount, it acquires the material moisture data collected by the detection unit.

2. The online moisture detection device according to claim 1, characterized in that, The first drive unit includes a first motor, two pulleys, a timing belt, and a mounting base. The first motor and the mounting base are spaced apart on the hopper along the width direction of the conveyor belt and are communicatively connected to the control module. One pulley is mounted on the output end of the first motor, and the other pulley is rotatably mounted on the mounting base. The timing belt is wound around the two pulleys, and the sampling unit is fixed on it.

3. The online moisture detection device according to claim 2, characterized in that, The first motor is a geared motor. The online moisture detection device also includes a position acquisition module, which is located in the hopper and is used to acquire and transmit the position of the sampling unit. The control module is communicatively connected to the position acquisition module and is used to determine whether the sampling unit has moved to a set position based on the received position of the sampling unit.

4. The online moisture detection device according to claim 3, characterized in that, The position acquisition module includes multiple position sensors, which are spaced apart on the hopper along the bandwidth of the conveyor belt and are respectively connected to the control module.

5. The online moisture detection device according to claim 4, characterized in that, The sampling module further includes a guiding unit, which includes a guide rail and a slider. The guide rail is located in the hopper along the width direction of the conveyor belt. One end of the slider is slidably connected to the guide rail, and the other end is fixedly connected to the synchronous belt. The sampling unit is fixed to the slider.

6. The online moisture detection device according to claim 5, characterized in that, The sampling unit includes a sampling tube, a sleeve, and a positioning block. The sampling tube is a tubular structure with openings at both ends, and one end is connected to the telescopic tube. The sleeve is fitted onto the sampling tube and is connected to the slider. The positioning block is installed on the side of the sleeve near the position sensor and cooperates with the position sensor.

7. The online moisture detection device according to claim 1, characterized in that, The detection shell includes a first shell and two first side plates. The first shell is a cavity structure with openings at both ends, and one end of the opening forms a connecting circular tube for connection with a telescopic tube. The two first side plates are arranged opposite to each other and fixed inside the first shell. The two first side plates cooperate with a part of the inner wall of the first shell to form a funnel-shaped flow channel for material passage, and cooperate with another part of the inner wall of the first shell to form a first installation space. The detection unit is located in the first installation space and is connected to the detection shell.

8. The online moisture detection device according to claim 7, characterized in that, The detection unit is a direct contact sensor, and the areas of the two first side plates corresponding to the first mounting space each have a first opening for exposing the detection unit; or... The detection unit is an indirect contact sensor. The first side plate is made of non-metallic material. Alternatively, the areas of the two first side plates corresponding to the first installation space are respectively provided with second openings and covered by non-metallic cover plates.

9. The online moisture detection device according to claim 7, characterized in that, The second drive unit includes a rotary cylinder, a cylinder seat, a bushing, a swing shaft, and two first bearings. The cylinder body of the rotary cylinder is mounted on the first housing via the cylinder seat, and the extension shaft is connected to the swing shaft via the bushing. The swing shaft extends into and is mounted on the first housing via the two first bearings. The baffle is connected to the swing shaft.

10. The online moisture detection device according to claim 7, characterized in that, It also includes a material level sensor, which is disposed above the first housing and is communicatively connected to the control module to acquire and deliver the material accumulation in the flow channel to the control module.

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