A high-precision belt weighing device for a grain depot

Abstract

This utility model discloses a high-precision belt weighing device for grain depots, comprising a conveyor frame, a weighing frame, idlers, a weighing sensor, a speed measuring device, a lidar module, an intelligent processing unit, and a support component. The weighing frame and idlers are positioned above the conveyor frame, with the weighing frame installed in the middle region of the conveyor frame. The support component is located at the lower part of the weighing frame and is connected to the weighing sensor via the support component. The weighing frame forms a weighing section on the conveyor frame. The idlers are positioned above the weighing frame and are arranged in several groups along the conveying direction. A conveyor belt is mounted on the idlers for conveying grain materials. The weighing sensor is installed between the weighing frame and the conveyor frame. The lidar module is located at the upper discharge end of the conveyor frame. The speed measuring device is installed at the lower part of the conveyor frame. In summary, this utility model has the advantages of stable overall structure, accurate signal acquisition, high measurement accuracy, strong adaptability, and high degree of intelligence.

Description

Technical Field

[0001] This utility model belongs to the technical field of grain depot weighing equipment, specifically relating to a high-precision belt weighing device for grain depots. Background Technology

[0002] In grain depot operations, accurate measurement of grain weight is a crucial aspect of storage management, cost control, and transaction settlement. Traditional grain depots often rely on manual estimation or static weighing, which is inefficient and prone to errors, failing to meet the dynamic management needs of modern grain depots. In recent years, belt conveyors combined with weighing devices have gradually become the primary means of dynamic grain measurement. By arranging a weighing mechanism under the conveyor belt and combining it with a speed measuring device to achieve continuous weighing, belt conveyors offer advantages such as ease of operation and high automation, and are widely used in grain warehousing, outbound processing, and transfer. Currently, the most common belt weighing devices on the market are mainly divided into two categories: mechanical and electronic. Mechanical belt scales have a simple structure but limited accuracy, while electronic belt scales, although improving measurement accuracy, are costly, require complex calibration, and necessitate frequent maintenance. Some solutions incorporating new sensing technologies have improved data acquisition methods to some extent, but they still fail to address the impact of grain flow characteristics, changes in stacking morphology, and environmental factors on measurement results, thus failing to meet the requirements.

[0003] However, existing belt weighing devices using novel sensing technologies still have many problems in actual operation. For example, the structural connection is too rigid, vibration interference is obvious, and weighing accuracy is limited. In some devices, the weighing frame is directly connected to the conveyor frame, causing vibration and temperature changes to be transmitted to the weighing sensor, affecting weighing stability. In some devices, the speed measuring device has a simple structure and unstable contact, making it difficult to maintain a close fit for a long time. In addition, there are problems such as insufficient protection of the infrared detection system and the sensor being susceptible to dust and light interference. At the same time, the signal acquisition and intelligent processing units are also scattered, resulting in complex wiring and inconvenient maintenance. The overall system has poor anti-interference ability and insufficient accuracy retention.

[0004] Therefore, there is an urgent need for a high-precision belt weighing device to improve the continuous weighing accuracy and system stability during grain transportation, and to solve the problems of unstable accuracy, poor environmental adaptability and complex maintenance of existing devices. Utility Model Content

[0005] In view of this, this utility model proposes a high-precision belt weighing device for grain depots, which is applied to the field of grain depot weighing equipment technology. By optimizing the connection relationship between the conveyor frame, weighing frame, idler rollers and weighing sensors, and combining the coordinated cooperation of lidar module, speed measuring device and intelligent processing unit, it solves the technical problems of existing grain depot weighing devices, such as strong structural connection rigidity, large vibration interference, insufficient sensor protection and unstable detection accuracy.

[0006] To achieve the above-mentioned technical objectives, the specific technical solution adopted by this utility model is as follows: A high-precision belt weighing device for grain depots includes a conveyor frame, a weighing frame, idlers, a weighing sensor, a speed measuring device, a lidar module, an intelligent processing unit, and support components. The conveyor frame is a welded carbon steel structure. The weighing frame and idlers are positioned above the conveyor frame, thus bearing and supporting the load through the conveyor frame. The weighing frame is installed in the middle area of ​​the conveyor frame. The support components are rigidly connected and located at the lower part of the weighing frame, connecting to the weighing sensor. The weighing frame forms a weighing section on the conveyor frame. The idlers are positioned above the weighing frame and arranged sequentially along the conveying direction. The system consists of several idler roller groups, each group comprising three trough-type idler rollers with a trough angle of 35°. A conveyor belt is installed on the idler rollers for conveying grain materials. A load cell is installed between the weighing frame and the conveyor frame. The lower end of the load cell is fixedly connected to the crossbeam of the conveyor frame, and the upper end is fixedly connected to the support. A lidar module is located at the discharge end above the conveyor frame. A speed measuring device is installed at the lower part of the conveyor frame. An intelligent processing unit is installed on the side of the conveyor frame and is electrically connected to the load cell, speed measuring device, and lidar module, respectively.

[0007] Furthermore, a crossbeam is provided at the bottom of the conveyor frame, and a weighing sensor is installed on the crossbeam. The support is located in the central area at the bottom of the weighing frame. The upper end of the support is connected to the bottom of the weighing frame, and the lower end of the support is connected to the weighing sensor, forming a vertical force support structure.

[0008] Furthermore, the weighing frame is a fully suspended structure, welded from rectangular steel pipes. Force is transmitted between the weighing frame and the conveyor frame through weighing sensors. There is no rigid contact between the weighing frame and the conveyor frame, thereby avoiding the influence of frame vibration and temperature changes on the weighing results and improving weighing accuracy and stability.

[0009] Furthermore, the weighing sensor consists of multiple pressure sensors evenly distributed along the width of the conveyor belt. Each pressure sensor has a mounting base underneath it, which is fixedly installed on the crossbeam at the bottom of the conveyor frame. The upper end of the pressure sensor is fixedly connected to the lower end of the support, and the upper end of the support is connected to the bottom of the weighing frame, forming a multi-point weighing detection structure.

[0010] Furthermore, the lidar module includes multiple vertically arranged lidar sub-assemblies, with a gap between the bottom of the lidar sub-assemblies and the surface of the conveyor belt. The lidar module is equipped with a transparent dust cover, which is fixed to a mounting bracket above the conveyor frame.

[0011] Furthermore, the speed measuring device includes a speed measuring wheel, a rotating shaft assembly, and a counterweight arm structure. One end of the rotating shaft assembly is coaxially connected to the speed measuring wheel, and the other end of the rotating shaft assembly is connected to the speed sensor. One end of the counterweight arm structure is hinged to the mounting base of the speed measuring device, and the other end of the counterweight arm structure is connected to the speed measuring wheel. The speed measuring wheel is in contact with the outer surface of the return section of the conveyor belt.

[0012] Furthermore, the intelligent processing unit is housed in a sealed metal protective enclosure, which is fixedly installed on the side of the conveyor frame for dustproof, moisture-proof, and shockproof protection.

[0013] By adopting the above technical solution, this utility model can also bring the following beneficial effects: 1. This utility model discloses a high-precision belt weighing device for grain depots. By setting weighing sensors and supporting components between the conveyor frame and the weighing frame to form a fully suspended structure, the weighing frame does not directly contact the conveyor frame. This effectively isolates the external interference of frame vibration and temperature changes from affecting the weighing results, thereby improving the stability and measurement accuracy of the weighing data. It has the advantages of strong anti-interference ability and high weighing reliability.

[0014] 2. This utility model mentions a high-precision belt weighing device for grain depots. By setting a crossbeam and mounting base at the lower part of the conveyor frame, pressure sensors are evenly distributed along the width of the conveyor belt to form a multi-point weighing detection structure. At the same time, the idler group adopts a three-section trough idler arrangement to keep the conveyor belt in a stable stress state in the weighing section. It can realize the accurate acquisition and continuous detection of the weight of grain materials, and has the advantages of reasonable structure and high measurement accuracy.

[0015] 3. This utility model mentions a high-precision belt weighing device for grain depots. By installing a laser radar module at the discharge end of the conveyor frame and adding a transparent dust cover to the outside, and with the electrical connection of a speed measuring device and an intelligent processing unit, it can realize comprehensive detection and real-time data processing of grain conveying speed, stacking height and cross-sectional shape. It can effectively reduce the interference of dust and ambient light on the detection signal, improve the overall intelligence level of the equipment, and has the advantages of complete detection function and strong environmental adaptability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a high-precision belt weighing device for grain depots mentioned in this utility model; Figure 2 This is a schematic diagram of the connection structure between the lidar module and the conveyor frame in this embodiment; In the diagram: 1. Conveyor frame; 2. Weighing frame; 3. Weighing sensor; 4. Idler roller; 5. Speed ​​measuring device; 6. Intelligent processing unit; 7. LiDAR module; 8. Conveyor belt; 9. Crossbeam. Detailed Implementation

[0018] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. This utility model can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this invention, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0021] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0022] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details. Example 1

[0023] like Figure 1 As shown, this utility model provides a high-precision belt weighing device for grain depots, including a conveyor frame 1, a weighing frame 2, idlers 4, a weighing sensor 3, a speed measuring device 5, a lidar module 7, an intelligent processing unit 6, and supporting components. The conveyor frame 1 is made of welded carbon steel, possessing sufficient rigidity and strength for overall support and installation. The weighing frame 2 is located in the middle area of ​​the conveyor frame 1 and is connected to the weighing sensor 3 via the supporting components, forming a fully suspended weighing structure. There is no rigid contact between the weighing frame 2 and the conveyor frame 1, allowing the weighing signal to be transmitted only through the weighing sensor 3, thereby effectively isolating the influence of frame vibration and ambient temperature changes on the weighing results. Idler rollers 4 are positioned above the weighing frame 2, and are arranged sequentially along the conveying direction into several groups of idler rollers 4. Each group of idler rollers 4 includes three trough-type idler rollers 4 with a trough angle of 35°, used to support the conveyor belt 8 and ensure its smooth operation. The conveyor belt 8 is positioned above the idler rollers 4 to carry and transport grain materials. A crossbeam 9 is provided at the lower part of the conveyor frame 1, and a weighing sensor 3 is installed on the crossbeam 9. A mounting base is fixedly installed below the weighing sensor 3 and welded to the crossbeam 9. The weighing sensor 3 adopts a pressure sensor array, which is evenly distributed along the width direction of the conveyor belt 8. The upper end of each sensor is fixedly connected to the lower end of the support, and the upper end of the support is fixedly connected to the bottom of the weighing frame 2, forming a multi-point weighing detection structure to realize continuous monitoring and real-time output of the weight of grain on the conveyor belt 8. The welded structure of the conveyor frame 1 and the three-section trough arrangement of the idler rollers 4 together ensure the stable operation of the conveyor belt 8 in the weighing section and reduce the measurement error caused by belt deviation.

[0024] like Figure 2As shown, the lidar module 7 is installed above the discharge end of the conveyor frame 1. It includes four vertically arranged lidar sub-components, each positioned at a different distance from the surface of the conveyor belt 8. These sub-components are used to detect the grain accumulation height and cross-sectional shape. The four lidar sub-components sequentially emit laser signals along the conveying direction and receive signals reflected by the grain. The intelligent processing unit 6 determines the grain accumulation height and cross-sectional shape by analyzing the reflected signals and their time differences, thus achieving synchronous measurement of material weight and accumulation volume. An external transparent dust cover is installed, which is fixed above the conveyor frame 1 by a mounting bracket to reduce dust and external light interference, and improve detection stability and accuracy. The speed measuring device 5 is located in the lower area of ​​the conveyor frame 1 and includes a speed measuring wheel, a rotating shaft assembly, and a counterweight arm structure. One end of the rotating shaft assembly is coaxially connected to the speed measuring wheel, and the other end is connected to the speed sensor. One end of the counterweight arm structure is hinged to the mounting base of the speed measuring device 5, and the other end is connected to the speed measuring wheel, so that the speed measuring wheel always keeps in contact with the outer surface of the return section of the conveyor belt 8 to ensure accurate acquisition of speed signals.

[0025] The intelligent processing unit 6 is installed on the side of the conveyor frame 1 and encapsulated in a sealed metal protective box. The sealed metal protective box is fixed to the side of the conveyor frame 1 and has dustproof, moisture-proof and shockproof performance. The intelligent processing unit 6 is electrically connected to the weighing sensor 3, the speed measuring device 5 and the lidar module 7 respectively. It is used to receive weight signals, speed signals and infrared signals, and perform synchronous sampling and calculation. It calculates the instantaneous flow rate, cumulative weight and grain pile volume parameters in real time. The intelligent processing unit 6 can transmit the data to the grain depot management system through the communication module to realize centralized analysis and remote monitoring of weighing data and improve the intelligence level of the system.

[0026] In the specific implementation process, when the conveyor belt 8 is running, the grain material is evenly distributed on the surface of the conveyor belt 8 and passes through the weighing section, speed measuring section and infrared detection section in sequence. The weighing sensor 3 detects the instantaneous weight signal of the grain on the belt, the speed measuring device 5 outputs the belt running speed signal, the lidar module 7 emits a laser beam and receives the reflected signal, and then the intelligent processing unit 6 processes the different signals and calculates them based on the comprehensive data of grain accumulation height, cross-sectional shape, speed and weight to obtain the instantaneous flow rate and cumulative weight of the grain, thereby realizing continuous high-precision weighing and intelligent monitoring.

[0027] In summary, this utility model, through the collaborative work of the lidar module 7, the weighing sensor 3, and the speed measuring device 5, acquires the height of the grain pile, the conveying speed, and the weight signals, realizing a comprehensive calculation of the grain volume and weight. This effectively compensates for errors caused by changes in grain density and belt tension fluctuations, achieving a measurement accuracy of 0.2% to 0.3%. Equipped with an intelligent adjustment module, it can automatically correct infrared measurement parameters based on real-time grain flow, adapting to the weighing requirements of different grain varieties (such as wheat, corn, and rice). In addition to real-time flow and cumulative weight calculation, the intelligent processing unit 6 also has data recording and production statistics functions, generating reports and uploading them to the grain depot management system via a network interface for inventory monitoring and remote data management. In conclusion, this utility model has the advantages of stable overall structure, accurate signal acquisition, high measurement accuracy, strong adaptability, and high level of intelligence.

[0028] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A high-precision belt weighing device for grain depots, characterized in that: The system includes a conveyor frame, a weighing frame, idlers, a load cell, a speed measuring device, a lidar module, an intelligent processing unit, and supporting components. The conveyor frame is a welded carbon steel structure. The weighing frame and idlers are positioned above the conveyor frame, thus bearing and supporting the load. The weighing frame is installed in the middle area of ​​the conveyor frame. The supporting components are rigidly connected structures, located at the lower part of the weighing frame, and connected to the load cell. The weighing frame forms a weighing section on the conveyor frame. The idlers are positioned above the weighing frame and are arranged in several groups along the conveying direction. Each idler roller assembly includes three trough-type idler rollers with a trough angle of 35°. A conveyor belt is installed on the idler rollers for conveying grain materials. The weighing sensor is installed between the weighing frame and the conveyor frame. The lower end of the weighing sensor is fixedly connected to the crossbeam of the conveyor frame, and the upper end of the weighing sensor is fixedly connected to the support. The lidar module is located at the discharge end above the conveyor frame. The speed measuring device is installed at the lower part of the conveyor frame. The intelligent processing unit is installed on the side of the conveyor frame and is electrically connected to the weighing sensor, the speed measuring device, and the lidar module, respectively.

2. The high-precision belt weighing device for grain depots according to claim 1, characterized in that: The conveyor frame is provided with a crossbeam at the bottom, and a weighing sensor is installed on the crossbeam. The support is located in the central area of ​​the lower part of the weighing frame. The upper end of the support is connected to the bottom of the weighing frame, and the lower end of the support is connected to the weighing sensor, forming a vertical force support structure.

3. A high-precision belt weighing device for grain depots according to claim 2, characterized in that: The weighing frame is a fully suspended structure, welded from rectangular steel pipes. Force is transmitted between the weighing frame and the conveyor frame through a weighing sensor. The connection between the weighing frame and the conveyor frame is not rigid, thus avoiding the influence of frame vibration and temperature changes on the weighing results and improving weighing accuracy and stability.

4. A high-precision belt weighing device for grain depots according to claim 3, characterized in that: The weighing sensor consists of multiple pressure sensors evenly distributed along the width of the conveyor belt. Each pressure sensor has a mounting base underneath it, and the mounting base is fixedly installed on the crossbeam at the bottom of the conveyor frame. The upper end of the pressure sensor is fixedly connected to the lower end of the support member, and the upper end of the support member is connected to the bottom of the weighing frame, forming a multi-point weighing detection structure.

5. A high-precision belt weighing device for grain depots according to claim 4, characterized in that: The lidar module includes multiple vertically arranged lidar sub-components. The bottom of each lidar sub-component is spaced from the surface of the conveyor belt. The lidar module is equipped with a transparent dust cover, which is fixed to a mounting bracket above the conveyor frame.

6. A high-precision belt weighing device for grain depots according to claim 5, characterized in that: The speed measuring device includes a speed measuring wheel, a rotating shaft assembly, and a counterweight arm structure. One end of the rotating shaft assembly is coaxially connected to the speed measuring wheel, and the other end of the rotating shaft assembly is connected to the speed sensor. One end of the counterweight arm structure is hinged to the mounting base of the speed measuring device, and the other end of the counterweight arm structure is connected to the speed measuring wheel. The speed measuring wheel is in contact with the outer surface of the return section of the conveyor belt.

7. A high-precision belt weighing device for grain depots according to claim 6, characterized in that: The intelligent processing unit is housed in a sealed metal protective enclosure, which is fixedly installed on the side of the conveyor frame for dustproof, moisture-proof, and shockproof protection.

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