Weighing device of conveying weighing machine

Abstract

The utility model discloses a weighing device of a conveying and weighing machine, and aims to solve the problems of low precision, low efficiency, poor stability and the like in the material conveying and weighing process of the conventional weighing device. The device is composed of a weighing sensor system, a weighing platform and material conveying system, a data processing and control system and a calibration and maintenance system. The weighing sensor system provides high-precision weight sensing, the weighing platform and the material conveying system achieve stable conveying and bearing of materials, the data processing and control system conducts data processing and equipment control through a microprocessor and the like, and the calibration and maintenance system guarantees the accuracy and reliability of the device. The system can be widely applied to material metering and batching links of multiple industries, the weighing precision and the automation level in the production process are effectively improved, and the product quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to weighing equipment technical field especially, relates to a kind of weighing device applied to conveying weighing machine, high-precision, high-efficiency dynamic weighing can be realized in material conveying process, can be widely applied to the material measurement and batching link of chemical industry, food, pharmaceutical, building material etc. BACKGROUND

[0002] In modern industrial production, accurate material weighing is of vital importance to ensure product quality, control production cost and ensure the stability and safety of production process. Traditional weighing methods, such as static weighing, can achieve high weighing accuracy, but are low in efficiency and cannot meet the needs of real-time material measurement and conveying in large-scale continuous production. However, some existing dynamic weighing devices often have problems such as insufficient weighing accuracy, being greatly affected by material flow characteristics, poor stability and high maintenance cost. For example, in the food industry, accurate proportioning and weighing of various raw materials is required. If the weighing device has large errors, it may cause inconsistent product taste, unbalanced nutrient composition and other problems. In the chemical industry, inaccurate material weighing may lead to out-of-control chemical reactions, unqualified products and other serious consequences. Therefore, it is urgent to develop a new type of conveying weighing machine weighing device. SUMMARY

[0003] The utility model aims at providing a conveying weighing machine weighing device to overcome the shortcomings of existing weighing devices in terms of precision, efficiency and stability, and to achieve high-precision dynamic weighing of materials during conveying, improve production automation level and product quality.

[0004] The utility model provides a conveying weighing machine weighing device, comprising:

[0005] The weighing sensor system has a high-precision load cell and a sensor signal conditioning circuit. The high-precision load cell is a plurality of strain gauge load cells with a range of [X] kg to [Y] kg and an accuracy of ±[specific accuracy value]. It is symmetrically installed below the weighing platform and connected through a high-strength alloy steel mounting bracket. The sensor signal conditioning circuit amplifies, filters and digitizes the sensor signal.

[0006] The weighing platform and the material conveying system comprise a weighing platform and a material conveying mechanism, the weighing platform is made of stainless steel and has an anti-skid texture on the surface, the size of the weighing platform is between [L1] meters and [L2] meters in length, between [W1] meters and [W2] meters in width, and between [H1] meters and [H2] meters in thickness, the weighing platform is provided with a baffle around the weighing platform, the height of the baffle is between [h1] meters and [h2] meters, the baffle is wrapped with rubber, the material conveying mechanism is located above the weighing platform and comprises a driving motor, a conveying belt and a roller, the driving motor is a variable frequency speed regulation motor and has a power between [P1] kilowatts and [P2] kilowatts, the conveying belt is a high-strength low-friction coefficient rubber conveying belt and has a width between [W3] meters and [W4] meters, and the roller has a diameter between [D1] meters and [D2] meters and a surface treated in a special manner.

[0007] The data processing and control system has a microprocessor, a storage unit, a control unit and a man-machine interface, the microprocessor is a high-performance embedded microprocessor and processes the weighing data by using a filtering and data compensation algorithm, the storage unit is connected with the microprocessor and has a storage capacity between [M1] bytes and [M2] bytes, the control unit controls the material conveying mechanism according to the data of the microprocessor, and the man-machine interface is a touch screen used for setting parameters and displaying information.

[0008] The calibration and maintenance system comprises a calibration device and a fault diagnosis and alarm system, the calibration device has standard weights and a calibration mechanism, the calibration mechanism can automatically load the standard weights, the fault diagnosis and alarm system monitors the running states of the components and alarms and displays fault information.

[0009] Further, the number of the load cells is 3 or 4.

[0010] Further, the signal conditioning circuit adopts a high-precision operational amplifier and a low-noise filter.

[0011] Further, the microprocessor adopts a Kalman filtering algorithm and a material flow and weighing error mathematical model to process data.

[0012] Further, the calibration mechanism adopts an electric lifting device and a positioning mechanism.

[0013] The weighing device of the conveying and weighing machine mainly comprises the following key parts:

[0014] The weighing sensor system:

[0015] High-precision weighing sensor: multiple (usually 3 or 4) high-precision strain gauge type weighing sensors are selected. It has the characteristics of high sensitivity, high stability and strong anti-interference ability. The range of the sensor is determined according to the maximum weighing value of the weighing device, generally between [X] kg and [Y] kg, and the accuracy can reach ±[specific accuracy value] (such as ±0.1%). The weighing sensor is symmetrically installed below the weighing platform and connected with the weighing platform through special mounting brackets to ensure that the sensor can accurately sense the weight change of the material. The mounting bracket is made of high-strength alloy steel and is precisely machined to ensure the levelness and perpendicularity of the sensor installation, reducing the weighing error caused by installation error.

[0016] Sensor signal conditioning circuit: This circuit is connected with the weighing sensor and mainly functions to amplify, filter, and analog-to-digital convert the weak electrical signals output by the sensor. The signal conditioning circuit uses high-precision operational amplifiers and low-noise filters to effectively improve the signal-to-noise ratio and ensure the accuracy of the weighing data. The conditioned digital signals are transmitted to the microprocessor for subsequent processing.

[0017] Weighing platform and material conveying system:

[0018] Weighing platform: made of stainless steel, with good corrosion resistance and mechanical strength. The surface of the weighing platform is designed with special anti-slip texture to prevent the material from sliding during conveying and affecting the weighing accuracy. The size of the weighing platform is determined according to the maximum conveying width and length of the material, generally with a length of [L1] meters to [L2] meters, a width of [W1] meters to [W2] meters, and a thickness of [H1] meters to [H2] meters. A baffle is provided around the weighing platform, with a height of [h1] meters to [h2] meters, wrapped with rubber material, which can block the overflow of material and avoid the impact of the collision between the material and the metal baffle on the weighing accuracy.

[0019] Material conveying mechanism: located above the weighing platform, mainly composed of a drive motor, a conveyor belt and rollers. The drive motor is a variable frequency speed motor with a power of [P1] kW to [P2] kW, which can accurately adjust the running speed of the conveyor belt according to the conveying requirements of the material. The conveyor belt is made of high-strength and low-friction coefficient rubber, with certain anti-static performance to prevent the material from being attracted by static electricity during conveying and affecting the weighing accuracy. The width of the conveyor belt matches the weighing platform, generally between [W3] meters and [W4] meters. Rollers are installed at both ends of the weighing platform to support and drive the conveyor belt, with a diameter of [D1] meters to [D2] meters. The surface of the roller is specially treated to increase the friction between the roller and the conveyor belt, ensuring smooth operation of the conveyor belt.

[0020] Data processing and control system:

[0021] Microprocessor: A high-performance embedded microprocessor, such as an ARM series, should be selected. It receives weighing data from the sensor signal conditioning circuit and processes it in real time. The microprocessor incorporates advanced filtering and data compensation algorithms, effectively eliminating weighing errors caused by factors such as material flow shock and vibration. For example, a Kalman filter algorithm is used to fuse sensor data, improving data stability and accuracy. By establishing a mathematical model between material flow and weighing error, real-time compensation is performed on weighing data.

[0022] Storage unit: Connected to the microprocessor, it stores information such as weighing data, equipment operating parameters, and historical records. The storage unit utilizes a high-capacity flash memory chip with a storage capacity between [M1] and [M2] bytes, sufficient for long-term data storage during production. The stored data can be transmitted to a host computer via a communication interface for further analysis and management.

[0023] Control Unit: This controls the operation of the material conveying mechanism based on microprocessor-processed weighing data and pre-set control strategies. For example, when the weighed weight reaches the preset batching value, the control unit stops the drive motor or adjusts the motor speed to achieve precise batching control. The control unit can also coordinate control with other production equipment, such as mixers and packaging machines, to achieve automated control of the entire production process.

[0024] Human-Machine Interface (HMI): Human-machine interaction is achieved through a touch screen. Operators can set weighing parameters such as target weight, material density, and conveyor speed on the HMI; and view real-time weighing data, equipment operating status, and alarm information. The HMI also features data statistics and report generation, enabling easy generation of daily production and material consumption reports, providing robust data support for production management.

[0025] Calibration and maintenance system:

[0026] Calibration device: This includes standard weights and a calibration mechanism. The standard weights, with a higher precision than the designed accuracy of the weighing device, are used for regular calibration of the weighing device. The calibration mechanism automatically loads the standard weights onto the weighing platform to simulate the weight of the material, and then adjusts the device based on the weighing results. The calibration mechanism utilizes a motorized lift and positioning mechanism to precisely control the loading position and weight of the standard weights, ensuring the accuracy and reliability of the calibration process.

[0027] Fault diagnosis and alarm system: real-time monitoring of the running state of each component of the weighing device, such as the working state of the sensor, the running parameter of the motor, the tension of the conveyor belt, etc. When detecting abnormal conditions, such as sensor failure, motor overload, conveyor belt deviation, etc., the system immediately sends an alarm signal and displays the fault information on the human-machine interface, which facilitates the maintenance personnel to quickly locate and eliminate the fault. The fault diagnosis and alarm system adopts multiple sensors and intelligent diagnosis algorithms, which can accurately judge the fault type and fault position, and improve the maintenance efficiency of the equipment.

[0028] The above description is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application, and can be implemented in accordance with the content of the specification, the following is a detailed description of the preferred embodiments of the present application with reference to the accompanying drawings. The specific embodiments of the present application are given in detail by the following examples and their accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0030] Figure 1 is a schematic diagram of the overall structure of the weighing device of the conveying weighing machine of the present application.

[0031] In the drawings, the component list represented by each number is as follows:

[0032] Among them, 1 is a weighing sensor, 2 is a weighing platform, 3 is a material conveying mechanism, 3-1 is a driving motor, 3-2 is a conveyor belt, 3-3 is a roller, 4 is a microprocessor, 5 is a storage unit, 6 is a control unit, 7 is a man-machine interface, and 8 is a calibration device. DETAILED DESCRIPTION

[0033] The following will be combined with the Figure 1 The principles and characteristics of the present application are described, and the examples are used only to explain the present application, and are not used to limit the scope of the present application. In the following paragraphs, the present application is described in more detail with reference to the drawings. According to the following description and claims, the advantages and characteristics of the present application will be more clear. It should be noted that the drawings are greatly simplified and use non-precise proportions, only to facilitate, clear and assist in the purpose of explaining the embodiments of the present application.

[0034] It should be understood that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In contrast, when an element is referred to as being "connected to" another element, it is either directly connected to the other element or intervening elements can be present. Also, a plus-mint "includes" or "comprising" something can be interpreted to mean that the something can or can not be present. As used herein, the terms "about" and "substantially" are used to describe and account for small fluctuations, such as due to measurement or manufacturing tolerances, and therefore refer to values that are not exact, but are close to the desired value. As used herein, the term "coupled" means the joining of two members directly or indirectly to one another. Such joining can be stationary in nature or movable in nature. Such

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] The specific implementation process of the weighing device of the conveying and weighing machine is described in detail below in combination with the drawings:

[0037] Equipment installation and commissioning:

[0038] According to the design requirements, install the weighing platform in a suitable place, symmetrically install the high-precision weighing sensor under the weighing platform through the installation support, adjust the installation position and levelness of the sensor to ensure uniform stress. Connect the sensor signal conditioning circuit and the weighing sensor, and perform signal line wiring and shielding treatment to prevent external electromagnetic interference.

[0039] Install the material conveying mechanism, assemble the driving motor, the roller and the conveying belt, adjust the position and tension of the roller to make the conveying belt run smoothly. Install the material conveying mechanism above the weighing platform to ensure that the gap between the conveying belt and the weighing platform meets the requirements and avoids material jamming.

[0040] Install the data processing and control system, install the microprocessor, storage unit and control unit in the control cabinet, and connect the communication lines between the components. Install the human-machine interface on the operation table and connect the communication cable with the microprocessor.

[0041] Install the calibration and maintenance system, install the standard weight and the calibration mechanism at the designated position, debug the electric lifting and positioning function of the calibration mechanism to ensure that it can accurately load the standard weight. Install various sensors of the fault diagnosis and alarm system, such as sensor state monitoring sensors, motor current sensors, conveying belt deviation sensors, etc., and connect them to the control system.

[0042] After the above installation is completed, the debugging work of the equipment is carried out. First, the sensor is calibrated, the standard weight is placed on the weighing platform, the output signal of the sensor is read through the microprocessor, the parameters of the signal conditioning circuit are adjusted, and the weighing data is accurate. Then, start the material conveying mechanism, adjust the speed of the driving motor, observe the running condition of the conveying belt, check whether there is deviation, slipping and other phenomena, adjust the position and tension of the roller. Then, test the function of the data processing and control system, set different weighing target values, convey materials through the material conveying mechanism, observe whether the weighing processing result of the microprocessor and the control action of the control unit are accurate, such as whether the material conveying can be accurately stopped or the conveying speed can be adjusted when the target value is reached. Finally, test the calibration and maintenance system, start the calibration mechanism, load the standard weight, check whether the calibration function of the weighing device is normal; simulate various fault conditions, such as sensor open circuit, motor overload, etc., check whether the fault diagnosis and alarm system can timely and accurately send alarm signal and display fault information.

[0043] Material weighing operation:

[0044] The operator sets the weighing parameters on the human-machine interface according to the characteristics of the material and the requirements of the production formula, such as the target weighing value, the density of the material, the running speed of the conveying belt, etc.

[0045] Start the material conveying mechanism, the driving motor drives the conveying belt to start running, and the material is conveyed from the feeding end to the weighing platform.

[0046] The weighing sensor senses the weight change of the material in real time, and transmits the electric signal to the sensor signal conditioning circuit. The signal conditioning circuit amplifies, filters, and digitizes the signal, and transmits the digital signal to the microprocessor.

[0047] After receiving the weighing data, the microprocessor processes it using the built-in filtering algorithm and data compensation algorithm to eliminate weighing errors caused by factors such as material flow impact and vibration, and obtains accurate material weight data.

[0048] The microprocessor transmits the processed weighing data to the control unit and the human-machine interface. The control unit judges whether the material reaches the target weighing value according to the weighing data and the preset control strategy. If the target value is not reached, the material continues to be conveyed; if the target value is reached, the control unit controls the driving motor to stop running, or adjusts the speed of the motor as needed to achieve accurate batching control.

[0049] The human-machine interface displays the weighing data, equipment running status, alarm information, etc. in real time, and the operator can check the progress of the weighing process at any time.

[0050] In the weighing process, if a fault occurs, such as sensor failure, motor overload, conveyor belt deviation, etc., the fault diagnosis and alarm system immediately sends an alarm signal and displays the fault information on the human-machine interface. Maintenance personnel repair or replace the faulty components according to the alarm information to ensure normal operation of the equipment.

[0051] When a batch of materials is weighed, the storage unit records the data of this weighing, including weighing time, weighing value, material type and other information. These data can be transmitted to the upper computer through the communication interface for further statistical analysis and management, providing data support for production process optimization and quality control.

[0052] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any person skilled in the art can implement the present application according to the drawings and the above description. However, any equivalent changes, modifications and evolutions made by those skilled in the art within the scope of the technical scheme of the present application, using the disclosed technical content, are equivalent embodiments of the present application. At the same time, any equivalent changes, modifications and evolutions made according to the essential technology of the present application are still within the protection scope of the technical scheme of the present application.

Claims

1. A weighing device for a conveyor weighing machine, characterized in that: include: A weighing sensor system comprising a high-precision load cell and a sensor signal conditioning circuit. The high-precision load cells are multiple strain-gauge load cells with a range of [X] kg to [Y] kg and an accuracy of ± [specific accuracy value]. The load cells are symmetrically mounted below the weighing platform and connected via a high-strength alloy steel mounting bracket. The sensor signal conditioning circuit amplifies, filters, and performs analog-to-digital conversion on the sensor signals. A weighing platform and material conveying system, comprising a weighing platform and a material conveying mechanism, wherein the weighing platform is made of stainless steel with a non-slip texture on the surface, has a length between [L1] m and [L2] m, a width between [W1] m and [W2] m, and a thickness between [H1] m and [H2] m, is surrounded by sidewalls with a height between [h1] m and [h2] m, and is covered with rubber. The material conveying mechanism is located above the weighing platform and comprises a drive motor, a conveyor belt, and a roller, wherein the drive motor is a variable frequency speed motor with a power between [P1] kW and [P2] kW, the conveyor belt is a high-strength, low-friction coefficient rubber conveyor belt with a width between [W3] m and [W4] m, and the roller has a diameter between [D1] m and [D2] m and a specially treated surface; A data processing and control system comprising a microprocessor, a storage unit, a control unit, and a human-machine interface. The microprocessor is a high-performance embedded microprocessor that uses filtering and data compensation algorithms to process weighing data. The storage unit is connected to the microprocessor and has a storage capacity between [M1] bytes and [M2] bytes. The control unit controls the material conveying mechanism based on the microprocessor data. The human-machine interface is a touch screen for setting parameters and displaying information. The calibration and maintenance system includes a calibration device and a fault diagnosis and alarm system. The calibration device has a standard weight and a calibration mechanism. The calibration mechanism can automatically load the standard weight. The fault diagnosis and alarm system monitors the operating status of each component and alarms and displays fault information.

2. The weighing device of the conveyor weighing machine according to claim 1, characterized in that: The number of the weighing sensors is 3 or 4.

3. The weighing device of the conveyor weighing machine according to claim 1, characterized in that: The signal conditioning circuit adopts a high-precision operational amplifier and a low-noise filter.

4. The weighing device of the conveyor weighing machine according to claim 1, characterized in that: The microprocessor uses a Kalman filter algorithm and a mathematical model of material flow and weighing error to process data.

5. The weighing device of the conveyor weighing machine according to claim 1, characterized in that: The calibration mechanism adopts an electric lifting device and a positioning mechanism.

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