Solid material microwave moisture content monitor

Abstract

The utility model discloses a solid material microwave moisture content monitor, including detection transmission belt frame, and the inside of detection transmission belt frame is equipped with detection transmission belt structure, and the rear end of detection transmission belt frame is equipped with detection frame, and the below of detection frame is equipped with the microwave receiver of cooperation microwave generator, and the front end of detection transmission belt frame is equipped with the even material transmission belt frame, and the even material transmission belt frame is equipped with the even material transmission belt structure of extending to the top of detection transmission belt structure front end, and the even material transmission belt frame is equipped with a plurality of vibration type even material structure, and the top of detection transmission belt frame is located detection frame front side and is equipped with the even material structure of shoveling, the utility model discloses compared with prior art's advantage lies in: the device can guarantee the accuracy operation of rear end microwave moisture detection through the vibration type even material and fluctuation type even material to the material on transmission belt before microwave moisture detection.

Description

Technical Field

[0001] This utility model relates to the field of solid material moisture content monitoring technology, specifically to a microwave moisture content monitor for solid materials. Background Technology

[0002] As polar molecules, water molecules in materials absorb microwave energy at a specific frequency (2.4 GHz) through the H0 bond under the action of a microwave electric field, causing the microwave energy to attenuate. The instrument calculates the moisture content based on the Doppler principle and mathematical model by detecting the degree of microwave signal attenuation and phase change after penetrating the material.

[0003] Microwave moisture content monitors for solid materials are mostly used to monitor the moisture content of materials on conveyor belts. However, for some relatively fine solid materials, the uneven distribution of the transported materials can easily lead to inaccurate detection during the moisture content monitoring process. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a microwave moisture content monitor for solid materials, addressing the shortcomings mentioned in the background art.

[0005] To solve the above technical problems, the technical solution provided by this utility model is as follows: a microwave moisture content monitor for solid materials, including a detection conveyor belt support frame and a control cabinet. The detection conveyor belt support frame is provided with a detection conveyor belt structure on its inner side, and a detection frame is provided at the rear end of the detection conveyor belt support frame. A microwave generator is provided inside the detection conveyor belt structure below the detection frame, and a microwave receiver is provided below the detection frame to cooperate with the microwave generator. A material leveling conveyor belt frame is provided at the front end of the detection conveyor belt support frame, and a material leveling conveyor belt structure extending to the front end of the detection conveyor belt structure is provided inside the material leveling conveyor belt frame.

[0006] The material distribution conveyor belt frame is equipped with multiple vibrating material distribution structures, and the top of the detection conveyor belt support frame is equipped with a material distribution structure located in front of the detection frame.

[0007] Furthermore, the vibratory material leveling structure includes a drive motor located on the outside of the material leveling conveyor belt frame. The power end of the drive motor is provided with a rotating shaft extending into the material leveling conveyor belt structure. The rotating shaft is provided with multiple vibrating cams to facilitate precise vibration material leveling operations on the material leveling conveyor belt structure.

[0008] Furthermore, the material-equalizing structure includes a support frame, with hinged plates on both sides of the bottom of the support frame, a support plate rotatably mounted between the hinged plates, and multiple material-equalizing rods evenly distributed below the support plate. The material-equalizing operation can be performed by the hinged support plate and the multiple material-equalizing rods.

[0009] Furthermore, the inner side of the detection conveyor belt support frame, located above the detection conveyor belt structure, is equipped with a material guide frame structure, which can ensure that all materials fully enter the detection range for operation.

[0010] Furthermore, the front end of the detection conveyor belt support frame is provided with a baffle plate structure, and the detection conveyor belt support frame is provided with a support plate frame structure inside the detection conveyor belt structure, which can prevent materials from falling out from the front end, and at the same time, the support plate frame structure can facilitate stable transmission operations.

[0011] The advantages of this microwave moisture content monitor for solid materials compared with the prior art are as follows: This device ensures the accuracy of the microwave moisture content monitoring operation by performing vibration and wave-like uniform material distribution on the conveyor belt before microwave moisture detection. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the first structure of a microwave moisture content monitor for solid materials.

[0013] Figure 2 This is a schematic diagram of the second structure of a microwave moisture content monitor for solid materials.

[0014] Figure 3 This is a side cross-sectional view of a microwave moisture content monitor for solid materials.

[0015] As shown in the figure: 1. Inspection conveyor belt support frame; 2. Material equalization conveyor belt frame; 3. Inspection conveyor belt structure; 4. Material equalization conveyor belt structure; 5. Microwave generator; 6. Microwave receiver; 7. Vibration-type material equalization structure; 8. Material feeding-type material equalization structure; 9. Drive motor; 10. Rotating shaft; 11. Vibration cam; 12. Support frame body; 13. Hinge plate; 14. Support plate; 15. Material feeding rod; 16. Guide frame structure; 17. Baffle plate structure; 18. Support plate frame structure; 19. Inspection frame; 20. Control cabinet. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] Combined with appendix Figure 1-3A microwave moisture content monitor for solid materials includes a detection conveyor belt support frame 1 and a control cabinet 20. The control cabinet 20 houses a PLC controller and a corresponding display screen for convenient control of the electrical components and data display. This is a common wiring control circuit, so it will not be described in detail. The detection conveyor belt support frame 1 has a detection conveyor belt structure 3 inside, and a detection frame 19 is located at the rear end of the support frame 1. A microwave generator 5 is located below the detection frame 19 within the detection conveyor belt structure 3, and a microwave receiver 6, which works in conjunction with the microwave generator 5, is located below the detection frame 19. This structure is a common microwave moisture content monitor. The structure of the moisture meter is based on the principle that water molecules undergo intense polarization under the influence of a microwave electric field. Water molecules are highly polar molecules, and under the influence of a microwave electric field, they undergo intense polarization relaxation and ion conduction, thereby absorbing microwave energy and converting it into heat energy. This causes the microwave signal penetrating the material to experience energy attenuation and phase lag. The instrument calculates the dielectric properties of the material by accurately measuring these two parameters. Then, it calculates the instantaneous height using an ultrasonic height compensation probe. Based on the ratio of the total lost microwave energy to the instantaneous height value (the change in material height is calculated using the ultrasonic height compensation probe to simulate the change in material mass), the moisture content of the material can be calculated using microcomputer system software.

[0018] The front end of the detection conveyor belt support frame 1 is provided with a material equalization conveyor belt frame 2. The material equalization conveyor belt frame 2 is provided with a material equalization conveyor belt structure 4 extending above the front end of the detection conveyor belt structure 3. The material equalization conveyor belt frame 2 is provided with multiple vibrating material equalization structures 7. The vibrating material equalization structure 7 includes a drive motor 9 located on the outside of the material equalization conveyor belt frame 2. The power end of the drive motor 9 is provided with a rotating shaft 10 extending into the material equalization conveyor belt structure 4. The rotating shaft 10 is provided with multiple vibrating cams 11. That is, the material equalization conveyor belt structure 4 is generally used for conveying raw materials. The drive motor 9 drives the rotating shaft 10 to rotate, and the multiple vibrating cams 11 drive the material equalization conveyor belt structure 4 to vibrate continuously, thereby achieving the effect of material equalization. When the vibrating cams 11 are installed, the highest point of the vibrating cam is generally slightly higher than the material equalization conveyor belt structure 4, and the vibration intensity is not too high. The specific intensity is adjusted on-site according to the size of the material. The multiple vibrating cams 11 need to be evenly distributed to ensure the quality of material equalization.

[0019] The top of the detection conveyor belt support frame 1, located in front of the detection frame 19, is equipped with a material-distributing structure 8. The material-distributing structure 8 includes a support frame body 12, with hinge plates 13 on both sides of the bottom of the support frame body 12. A support plate 14 is rotatably mounted between the hinge plates 13. Multiple material-distributing rods 15 are evenly distributed below the support plate 14. A vibration material distribution operation is set at the front end. At the same time, the material is distributed by the support plate 14 and the multiple material-distributing rods 15, thereby physically distributing the material evenly. The density of the material-distributing rods 15 is set according to the size of the material; the larger the material, the lower the density, and the smaller the material, the higher the density.

[0020] The inner side of the detection conveyor belt support frame 1, above the detection conveyor belt structure 3, is provided with a guide frame structure 16. In actual arrangement, the width of the material distribution conveyor belt structure 4 is slightly smaller than that of the detection conveyor belt structure 3, so as to facilitate the complete entry of materials into the detection conveyor belt structure 3. At the same time, the guide frame structure 16 ensures that all materials can enter the detection range. The front end of the detection conveyor belt support frame 1 is provided with a baffle plate structure 17. The detection conveyor belt support frame 1 is located inside the detection conveyor belt structure 3 and is provided with a support plate frame structure 18. The height of the material distribution conveyor belt structure 4 is only slightly higher than that of the detection conveyor belt structure 3. Together with the support plate frame structure 18, it can prevent the materials from bouncing when falling.

[0021] The specific implementation steps are as follows:

[0022] Material conveying: The uniform material conveyor belt structure 4 conveys fine solid materials to the detection conveyor belt structure 3. The width of the uniform material conveyor belt structure 4 is slightly smaller than that of the detection conveyor belt structure 3, and the height is slightly higher than that of the detection conveyor belt structure 3. Together with the support frame structure 18, it prevents the materials from bouncing.

[0023] First uniform material distribution: Start the drive motor 9 to drive the rotating shaft 10 and the vibrating cam 11 to rotate. The vibrating cam 11 intermittently contacts the uniform material conveyor belt structure 4, causing it to vibrate slightly (the vibration intensity is adjusted according to the material on site). Under the action of vibration, the material is initially spread evenly.

[0024] Second material distribution: After the material enters the detection conveyor belt structure 3, it is guided to the front of the detection area by the guide frame structure 16. The support plate 14 of the material distribution structure 8 rotates through the hinge plate 13, which drives the material distribution rod 15 to move the material, so that the material is further evenly distributed.

[0025] Microwave detection: The uniformly distributed material passes between the microwave generator 5 and the microwave receiver 6. The microwave generator emits 2.4GHz microwaves, which penetrate the material and are received by the microwave receiver. The instrument detects the signal attenuation and phase change, and calculates the moisture content in combination with the calibration model.

[0026] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A microwave moisture content monitor for solid materials, comprising a detection conveyor belt support frame (1) and a control cabinet (20), wherein a detection conveyor belt structure (3) is provided inside the detection conveyor belt support frame (1), a detection frame (19) is provided at the rear end of the detection conveyor belt support frame (1), a microwave generator (5) is provided inside the detection conveyor belt structure (3) below the detection frame (19), and a microwave receiver (6) is provided below the detection frame (19) in conjunction with the microwave generator (5), characterized in that: The front end of the detection conveyor belt support frame (1) is provided with a material equalization conveyor belt frame (2), and the material equalization conveyor belt frame (2) is provided with a material equalization conveyor belt structure (4) extending to the front end of the detection conveyor belt structure (3). The material equalization conveyor belt frame (2) is provided with multiple vibrating material equalization structures (7), and the top of the detection conveyor belt support frame (1) is provided with a material equalization structure (8) located in front of the detection frame (19).

2. The microwave moisture content monitor for solid materials according to claim 1, characterized in that: The vibratory material distribution structure (7) includes a drive motor (9) located outside the material distribution conveyor belt frame (2). The drive motor (9) has a rotating shaft (10) extending into the material distribution conveyor belt structure (4) at its power end. The rotating shaft (10) is provided with multiple vibratory cams (11).

3. The microwave moisture content monitor for solid materials according to claim 1, characterized in that: The material feeding structure (8) includes a support frame (12), with hinge plates (13) on both sides of the bottom of the support frame (12), and a support plate (14) rotatably arranged between the hinge plates (13), and multiple material feeding rods (15) evenly distributed below the support plate (14).

4. The microwave moisture content monitor for solid materials according to claim 1, characterized in that: The inner side of the detection conveyor belt support frame (1) is provided with a guide frame structure (16) above the detection conveyor belt structure (3).

5. A microwave moisture content monitor for solid materials according to claim 1, characterized in that: The front end of the detection conveyor belt support frame (1) is provided with a baffle plate structure (17), and the detection conveyor belt support frame (1) is provided with a support plate frame structure (18) inside the detection conveyor belt structure (3).

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