High-precision flow scale based on soft conveyor belt structure
The high-precision flow scale addresses instability issues by using a soft conveyor belt structure with synchronized edges and separation mechanisms, ensuring accurate real-time measurement of varying flow rates.
Patent Information
- Application Number
- CN201910704898.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-07-31
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2039-07-31
AI Technical Summary
Existing flow scales are adversely affected by mechanical accuracy, belt tension, and vibration, leading to unstable long-term operation and high mechanical structure accuracy requirements, especially for small flow rate measurements.
A high-precision flow scale utilizing a soft conveyor belt structure with synchronized edge and middle parts, incorporating a weighing device and separation mechanisms to isolate conveyor belt movement from the weighing process, enabling real-time data collection and accurate weight measurement.
The solution improves measurement accuracy by isolating the weighing device from conveyor belt movement, reducing mechanical structure assembly requirements and costs, while achieving precise measurement of both small and large flow rates.
Smart Images
Figure CN110550384B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a flow scale, in particular to a high-precision dynamic flow scale based on a soft conveyor belt. Background Art
[0002] In many industries such as tea processing, Chinese medicinal materials, food, chemical industry, electromechanical, etc., the real-time flow rate of materials to be processed is a very important data that affects the stability and excellent quality of the processed materials, and high-precision flow scales are key equipment for measuring the flow rate of raw materials. Especially in automated production and processing lines, all production and processing are continuous, and the flow rate of the production line is a very important process parameter. Flow rate is often measured in motion, such as conveyor belts. During the movement, due to mechanical accuracy, belt tension, vibration and other factors, the true reflection of sensor data is seriously affected. Long-term operation, many unstable factors, and uncontrollable cumulative errors, especially for the measurement of small flow rates, the errors are very large and have no practical value.
[0003] The flow scale sensor is located under the moving conveyor belt, which causes the moving mechanism to have a great influence on the sensor measurement, or some flow scales use static scales instead of flow scales, resulting in discontinuous material transportation. The existing technical defects are: the real-time flow scale measurement accuracy is greatly affected by many factors, long-term operation is unstable, and the mechanical structure accuracy and transmission part stability requirements are high. Summary of the invention
[0004] In order to overcome the shortcomings of the existing technology that the real-time flow scale measurement accuracy is greatly affected by many factors, long-term operation is unstable, and the mechanical structure accuracy and transmission part stability requirements are high, the present invention provides a high-precision flow scale based on a soft conveyor belt structure with higher accuracy.
[0005] The technical solution adopted by the present invention to solve its technical problem is:
[0006] A high-precision flow scale based on a soft conveyor belt structure, comprising a soft conveyor belt, a conveyor belt support platform and a weighing device;
[0007] The conveyor belt is a conveyor belt composed of two different materials firmly spliced on both sides of the edge and the middle part. The two sides of the edge of the conveyor belt are used to drive the entire conveyor belt and the materials on the conveyor belt to be transported forward. During the forward transportation process, the two sides of the edge of the conveyor belt are strictly synchronized, and the two sides are prohibited from being misaligned. The middle part of the conveyor belt is made of soft material; weighing area separation marks are installed on both sides of the conveyor belt and fixed on the conveyor belt. The separation marks move with the conveyor belt; the distance between two adjacent separation marks matches the length of the weighing platform;
[0008] The conveyor belt supporting platform includes a front portion of the weighing plate, a weighing plate portion and a rear portion of the weighing plate, wherein the front portion of the weighing plate is a front platform, and the rear portion of the weighing plate is a rear platform, and the front platform, the weighing plate portion and the rear platform are in the same plane;
[0009] The weighing device includes a position sensor and a weighing sensor. The weighing sensor is installed under the weighing platform. The position sensor is installed at the starting end or the ending end of the weighing platform. The position sensor is used to detect the separation mark fixed on the conveyor belt. When a position sensor detects a separation mark, it means that only one complete separation area has entered the weighing platform. The position sensor is triggered in real time: the weight and the time of collection are collected. The weight sensor can measure the weight in real time and provide a real-time data collection interface.
[0010] Furthermore, the flow scale also includes a material guide device, which is a mechanism installed at the feed inlet to guide the materials distributed on the entire conveyor belt to slowly guide and concentrate them in the middle area of the conveyor belt. It can be a guide plate or other structural forms.
[0011] The flow scale also includes a material separation device, which is a device installed at the end of the flow guide device and fixed on the frame, and consists of a position sensor and the material separation device.
[0012] The position sensor detects the separation mark and provides a material separation signal; the material separation device separates the materials on the conveyor belt after receiving the separation signal.
[0013] The material separation device may be structured as a separation bar installed between the conveyor belt and the front plate. After receiving the separation signal, the conveyor belt is shaken upward, and the material on the conveyor belt is dispersed to both sides, so that there is no material above the separation bar.
[0014] Alternatively, the material separation device may be structured as a brush, which is used to separate the materials on the conveyor belt at the front and rear ends after receiving a separation signal.
[0015] Alternatively, the material separation device may be structured as a blowing device, which uses gas to separate the front and rear materials on the conveyor belt after receiving a separation signal, and is also provided with a cover to prevent the materials from flying up.
[0016] The technical concept of the present invention is: the conveyor belt of the dynamic flow scale is transformed into a splicing composition of two different materials, the edge parts on both sides of the conveyor belt play the role of fixing the conveyor belt and driving the conveyor belt, the middle part of the conveyor belt is soft and not subjected to force, the influence of the conveyor belt movement on the weighing device is isolated, and the full real weight of the material can be measured by the weighing device. The weighing device is stationary and placed under the soft conveyor belt, so that the weighing device is not affected by the movement, and the measurement accuracy is improved. With the help of real-time data acquisition technology, the material weight and acquisition time of the weighing platform are obtained, so that the real-time flow data can be calculated to realize the flow scale function.
[0017] The beneficial effects of the present invention are mainly manifested in that the weighing device is stationary, the weighing sensor and the factors affecting the movement of the conveyor belt are completely isolated; the assembly accuracy requirements of the flow scale mechanical structure are greatly reduced, and the cost can also be effectively reduced. By combining the near-sighted static weighing of the moving material with real-time data collection, the measurement accuracy of the dynamic flow scale is greatly improved, and high-precision measurement of very small flow to very large flow is achieved. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 Schematic diagram of a high-precision dynamic flow scale based on a soft conveyor belt.
[0019] Figure 2 yes Figure 1 Top view of the . DETAILED DESCRIPTION
[0020] The present invention will be further described below in conjunction with the accompanying drawings.
[0021] Reference Figure 1 and Figure 2 , a high-precision dynamic flow scale based on a soft conveyor belt, including a soft conveyor belt, a conveyor belt supporting platform, a weighing device, a material guiding device and a material separating device.
[0022] The soft conveyor belt is a conveyor belt composed of two different materials firmly spliced on both sides of the edge and the middle part. The edges of the conveyor belt are made of a material with a certain elasticity and a little hardness, which is responsible for driving the entire conveyor belt and ensuring the synchronous movement of the two sides of the conveyor belt and the forward conveying of the materials on the conveyor belt. During the forward conveying process, the edges of the conveyor belt are strictly synchronized, and the two sides are prohibited from being misaligned. A V-belt can be used for belt transmission, or a gear and pinion gear meshing transmission can be used; the middle part of the conveyor belt is made of soft material, which does not bear the weight of the material and only plays the role of conveying the material forward; weighing area separation marks are installed on both sides of the conveyor belt and fixed on the conveyor belt. The separation marks move with the conveyor belt; the distance between two adjacent separation marks is equal to (or slightly greater than or less than) the length of the weighing platform.
[0023] The conveyor belt support platform is composed of three parts. The first part is the front platform, which is composed of a rigid flat plate. This part is separated from the second part, the weighing platform. The second part is the weighing device, which has a rigidly fixed flat plate on top and a weighing sensor installed below it. This part of the flat plate is free in the vertical direction, and the weight of the material placed on it can be measured by the sensor. The third part is the rear platform, which is composed of a rigid flat plate. The material enters this platform and moves out of the flow scale. This part is also separated from the second part.
[0024] Furthermore, the weighing device is composed of a position sensor, a weighing plate, and a weighing sensor. The position sensor detects the separation mark and provides when to collect weight data (collected weight and collection time); the weight sensor measures the weight of the material on the weighing plate. The weight sensor needs to provide a real-time data collection interface. The collection frequency is set according to the application scenario requirements of the flow scale, and the number of weighing sensors can be determined according to needs.
[0025] The material guide device is installed at the feed port to guide the materials distributed on the entire conveyor belt to slowly guide and concentrate them in the middle area of the conveyor belt.
[0026] The material separation device refers to a device installed at the end of the guide device and fixed on the frame, including a position sensor and a material separation device. The position sensor detects the separation mark and provides the time to separate the materials; the function of the material separation device is to separate the materials in two adjacent weighing areas. The structure of the material separation device can be a dividing bar installed between the conveyor belt and the front plate. The dividing bar shakes the conveyor belt upward after receiving the separation time, and the materials on the conveyor belt are dispersed to both sides, so that there is no material above the dividing bar; its structure can also be a brush installed on the conveyor belt, which separates the materials on the conveyor belt after receiving the separation signal; its structure can also be a blowing device, which uses blowing to separate the materials on the conveyor belt after receiving the separation signal.
[0027] In this embodiment, the mechanical structure must ensure that the raw materials to be weighed can be continuously diverted to the middle area of the conveyor belt; the area marked by the two separation marks is the weighing area, and there must be no materials between the two adjacent weighing areas, that is, the materials in the two adjacent weighing areas are separated and stacked discontinuously; the position sensor fixed at the starting end or the end end of the weighing platform detects the separation mark fixed on the conveyor belt, triggers the data acquisition signal, and performs weight acquisition and time acquisition. The distance between the two separation marks is equal to the length of the weighing platform, ensuring that when the weight is collected, the weighed raw materials have all been moved out of the weighing plate, and the raw materials to be weighed have all entered the weighing plate. Real-time data acquisition refers to recording the weight collected at the time and the time interval of the collection at the time, and the weight collected at the time / the time interval of the collection at the time = the real-time flow of the flow scale. The total weight of the conveyed material is obtained by accumulating the weight collected at the time through the software, and the total working time of the flow scale is obtained by accumulating the time interval of the collection at the time. If the cumulative window length selects the time when the conveyor belt runs one circle, the real-time average flow of the flow scale single circle is obtained, that is: the total weight of the raw material single circle / the total working time of the single circle = the real-time average flow of the flow scale single circle.
[0028] The structure of the high-precision dynamic flow scale based on the soft conveyor belt in this embodiment is as follows Figure 1 As shown, it includes a driving motor 7, a transmission wheel 14, a middle part 3 and two side parts 4 of a soft conveyor belt, a material guide device 1, a material separation device 2, a front platform 8, a weighing device including a weighing platform 12, a position sensor 10 and a weighing sensor 11, and a rear platform 13. Weighing area separation marks 5 are evenly arranged on the soft conveyor belt 4. A position sensor 9 is fixed on the material separation device 2. There is also a human-machine interface 6 for real-time data collection, real-time dynamic flow calculation, display and flow scale operation. The human-machine interface is used to collect and display flow scale information, and can also transmit data to a third party and collect third-party data.
Claims
1. A high-precision flow scale based on a soft conveyor belt structure, characterized in that: It includes a soft conveyor belt, a conveyor belt support platform and a weighing device; The conveyor belt is a conveyor belt composed of two different materials firmly spliced on both sides of the edge and the middle part. The two sides of the edge of the conveyor belt are used to drive the entire conveyor belt and the materials on the conveyor belt to be transported forward, and the two sides move synchronously. The middle part of the conveyor belt is made of soft material; weighing area separation marks are installed on both sides of the conveyor belt and fixed on the conveyor belt. The separation marks move with the conveyor belt; the distance between two adjacent separation marks matches the length of the weighing platform; The conveyor belt supporting platform includes a front portion of the weighing plate, a weighing plate portion and a rear portion of the weighing plate, wherein the front portion of the weighing plate is a front platform, and the rear portion of the weighing plate is a rear platform, and the front platform, the weighing plate portion and the rear platform are in the same plane; The weighing device comprises a position sensor and a weighing sensor, and the weighing sensor is installed under the weighing platform; the position sensor is installed at the starting end or the ending end of the weighing platform, and the position sensor is used to detect the separation mark fixed on the conveyor belt; The flow scale also includes a material diversion device, which refers to a mechanism installed at the feed port to guide the materials distributed on the entire conveyor belt to slowly divert and concentrate them in the middle area of the conveyor belt. The distance between two adjacent separation marks is the same as the length of the weighing platform. The flow scale also includes a material separation device, which refers to a device installed at the end of the diversion device and fixed on the frame, and is composed of a position sensor and a material separation device. The position sensor detects the separation mark and provides a signal for separating the materials. The material separation device separates the materials on the conveyor belt after receiving the separation signal. The material separation device is a separation strip installed between the conveyor belt and the front plate. The material separation device is a brush, which uses the brush to separate the materials on the conveyor belt before and after receiving the separation signal.
2. The high-precision flow scale based on a soft conveyor belt structure as claimed in claim 1, characterized in that: The material separation device is an air blowing device, which uses gas to separate the front and back materials on the conveyor belt after receiving the separation signal, and is also provided with a cover to prevent the materials from flying up.