Electronic belt scale on-line calibration device

Abstract

This utility model discloses an online calibration device for electronic belt scales, including a conveyor belt, sections placed on the conveyor belt, and idlers. The sections are fixed to the weighing area of ​​the conveyor belt along its length by a suspension device. Each section includes a head section and several connecting sections. The head section and the immediately following connecting section, as well as two adjacent connecting sections, are connected by a connecting pipe. One end of the head section and the connecting section is a conical head, and the other end has a conical groove at the center that matches the head of the conical head. One end of the head section is fixedly connected to the suspension device, and one end of the connecting pipe is fixedly connected to the other end of the head section or the connecting section. The other end of the connecting pipe accommodates the conical head of the immediately following connecting section. The beneficial effect of this utility model is that the sections are connected as a whole, ensuring that the material will not be stuck between adjacent sections, while ensuring the straightness of the entire section and avoiding uneven weight distribution caused by partial section offset.

Description

Technical Field

[0001] This utility model relates to the field of electronic belt scale technology, and in particular to an online calibration device for electronic belt scales. Background Technology

[0002] Electronic belt scales, installed on belt conveyor equipment, are metering devices capable of continuous dynamic weighing of bulk materials. They are widely used in industries such as metallurgy, coal, chemicals, dock handling, and power plants, accurately displaying the instantaneous flow rate and cumulative total amount of materials. The calibration of electronic belt scales relies on calibrating with a batch of physical objects of known weight. The basic attributes of this calibration method are: 1. The load must be on the belt and move synchronously with it; 2. The load must cover the entire belt. However, most application sites cannot provide the conditions for physical calibration. Even in a few sites where these conditions are met, it requires significant manpower and resources and is limited by factors such as weather and the moisture content of the material. Therefore, it is necessary to use simulated physical load devices for calibration. Existing circulating chain code devices, due to their structural characteristics, tend to accumulate material during operation. The circulating chain code moves synchronously with the material, making the adhered material difficult to separate. After several revolutions, the amount of adhered material increases, leading to significant errors.

[0003] For example, Chinese invention patent publication number CN117213599A discloses a calibration method for electronic belt scales. Several electronic belt scales with identical performance are placed under the belt of a conveyor. Under normal conveyor operation, the weight sequences of the several electronic belt scales are continuously collected for T (T≧1) integer turns, and stored in a queue. After collection, a planning and processing method is used to make the weights of the several electronic belt scales equal. A serial number is added to the material transported on the conveyor belt carried by one of the electronic belt scales. The weight sequences of the several electronic belt scales are continuously collected for T (T≧1) integer turns, and stored in a queue. After collection, the weight of any electronic belt scale without the serial number is used as a reference value to calculate the additional weight and the actual calculated weight of the electronic belt scale with the serial number, thus obtaining the calibration coefficient. This patent uses a serial number that attempts to reduce movement through suspension and fixation; however, in use, it was found that the serial number still comes into direct contact with the material, and the adhesion problem cannot be completely avoided. In particular, the serial weight consists of multiple cylindrical bars connected in series. The gaps between two adjacent bars are prone to material accumulation. In addition, during the continuous operation of the belt conveyor, belt vibration, material flow impact, or loosening of the suspension points may cause the serial weight to shift, making it impossible for the serial weight to maintain an ideal linear distribution. The weight distribution is uneven, which affects the weighing reading of the electronic belt scale. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing serial codes are prone to material accumulation and misalignment, resulting in uneven weight distribution. To address this, an online calibration device for electronic belt scales is provided.

[0005] This utility model provides the following technical solution: an online calibration device for an electronic belt scale, comprising a conveyor belt, sections placed on the conveyor belt, and idlers. The sections are fixed to the weighing area of ​​the conveyor belt along its length by a suspension device. Each section includes a head section and several connecting sections. The head section and the immediately following connecting section, as well as two adjacent connecting sections, are connected by a connecting pipe. One end of the head section and the connecting section is a conical head, and the other end has a conical groove at the center that matches the head of the conical head. One end of the head section is fixedly connected to the suspension device, and one end of the connecting pipe is fixedly connected to the other end of the head section or the connecting section. The other end of the connecting pipe accommodates the conical head of the immediately following connecting section. Several sliders located on the same circumference are fixedly connected to the outer circumference of the conical head of the connecting section. The inner wall of the connecting pipe has a groove that mates with the sliders. The sliders are connected to the other end of the head section or the immediately preceding connecting section by a compression spring. The other end of the connecting section at the end is fixedly connected to the suspension device.

[0006] An improvement to the above scheme is that a buffer layer is provided inside the conical groove.

[0007] The above scheme describes three sliders.

[0008] The suspension device described in the above scheme includes two frames spanning the conveyor belt, and the tops of the two frames are respectively fixed to one end of the head code and the other end of the connecting code located at the end via connectors.

[0009] A further improvement to the above scheme is that the top of a frame is fixed to one end of a head code or the other end of a connecting code located at the end via a connector, bypassing a pulley.

[0010] A further improvement to the above scheme is that a winch is mounted on top of the frame and fixed to the connector.

[0011] The beneficial effects of this utility model are as follows: by connecting the head code and several connecting codes into one unit through the connecting tube, it is ensured that the material will not be stuck between adjacent codes, while ensuring the straightness of the overall code section and avoiding uneven weight distribution caused by partial code offset. In addition, under normal conditions, the compression spring is in the initial state, that is, there is a gap between the conical groove at the front and the conical head at the rear. When the material is impacted, axial displacement can occur between the head code and the connecting code, and the compression spring is compressed to offset the impact force and enhance the stability of the code section. When the impact force disappears, the compression spring returns to its original position. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the head code and connection code working together in this utility model; Figure 3 yes Figure 2 A diagram illustrating the usage status of the document; Figure 4 yes Figure 2 Diagram showing the interaction between the connector and the slider; Figure 5 yes Figure 2 Schematic diagram of the connecting pipe; In the diagram: 1. Conveyor belt, 2. Section code, 21. Head code, 22. Connecting code, 23. Connecting pipe, 24. Conical groove, 25. Slider, 26. Slide groove, 27. Compression spring, 3. Idler roller, 4. Frame, 5. Connector. Detailed Implementation

[0013] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0014] like Figure 1-5 As shown, the online calibration device for an electronic belt scale includes a conveyor belt 1, sections 2 placed on the conveyor belt, and idlers 3. The sections are fixed to the weighing area of ​​the conveyor belt along its length by a suspension device. Each section includes a head section 21 and several connecting sections 22. The head section and the immediately following connecting section, as well as two adjacent connecting sections, are connected by a connecting pipe 23. One end of the head section and the connecting section is a conical head, and the other end has a conical groove 24 at the center that matches the head of the conical head. One end of the head section is fixed to the suspension device, and one end of the connecting pipe is fixed to the other end of the head section or the connecting section. The other end of the connecting pipe accommodates the conical head of the immediately following connecting section. Several sliders 25 located on the same circumference are fixed to the outer circumference of the conical head of the connecting section. The inner wall of the connecting pipe has a groove 26 that mates with the sliders. The sliders are connected to the other end of the head section or the immediately preceding connecting section by a compression spring 27. The other end of the connecting section at the end is fixed to the suspension device.

[0015] This utility model's segmented structure consists of a head segment and several connecting segments connected sequentially by connecting pipes, forming a continuous, closed structure. One end of the head segment, specifically the end with a conical head, is connected to the suspension device. The connecting segment at the end, referred to as the tail segment, is also connected to the suspension device, ensuring the segments are linearly and centrally distributed along the material conveying direction on the conveyor belt. This structure guarantees overall stability and prevents any connecting segment from shifting laterally. Under normal conditions, a gap exists between the conical groove of the head segment and the conical head of the adjacent connecting segment, and similarly for the subsequent connecting segments. When impacted by materials such as gravel, relative displacement occurs between the head segment and the connecting segments, compressing the springs and absorbing the impact force. After the impact dissipates, the springs rebound, returning the head segment and connecting segments to their initial state. The suspension device ensures the segments remain stationary within the weighing area. The suspension device can be a gantry frame and ropes connecting the head segment and the tail segment. When the head of the conical tip is fully fitted into the conical groove, there will still be a portion of the conical tip remaining inside the connecting tube. Ideally, the length of the connecting tube and the elastic coefficient of the compression spring should ensure that the conical tip does not completely detach from the connecting tube in the event of an impact. There are three, four, or even more sliders, and a corresponding number of compression springs.

[0016] To prevent damage when the header and connector collide, a buffer layer can be provided inside the conical groove. The buffer layer can be made of rubber, nylon, or sponge, or the cone head can be covered with a buffer layer.

[0017] The suspension device includes two frames 4 spanning the conveyor belt, the tops of which are fixed to one end of the head code and the other end of the end code via connectors 5. The connectors can be steel wire ropes.

[0018] To ensure the reliability of the segment code during operation, the top of a frame is fixed to one end of the head code or the other end of the end code via a connector, bypassing a pulley. The pulley redirects the connector, changing the stress concentration point and preventing stress from concentrating at both ends of the segment code.

[0019] A winch fixed to the connector is installed on the top of one frame. The length of the connector is adjusted by the winch. Alternatively, winches fixed to the connector can be installed on the top of two frames to facilitate the loading and unloading of the sections.

[0020] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An online calibration device for an electronic belt scale, comprising a conveyor belt (1), sections (2) placed on the conveyor belt, and idlers (3), characterized in that, The segment code is fixed to the weighing area of ​​the conveyor belt along the length of the conveyor belt by a suspension device. The segment code includes a head code (21) and several connecting codes (22). The head code and the immediately following connecting code, as well as two adjacent connecting codes, are connected by a connecting pipe (23). One end of the head code and the connecting code is a conical head, and the other end has a conical groove (24) at the center that matches the head of the conical head. One end of the head code is fixed to the suspension device, and one end of the connecting pipe is fixed to the other end of the head code or the connecting code. The other end of the connecting pipe accommodates the conical head of the immediately following connecting code. Several sliders (25) located on the same circumference are fixed to the outer circumference of the conical head of the connecting code. The inner wall of the connecting pipe is provided with a sliding groove (26) that cooperates with the slider. The slider is connected to the other end of the head code or the immediately preceding connecting code by a compression spring (27). The other end of the connecting code at the end is fixed to the suspension device.

2. The online calibration device for electronic belt scales as described in claim 1, characterized in that, The conical groove is provided with a buffer layer.

3. The online calibration device for electronic belt scales as described in claim 1, characterized in that, There are three sliders.

4. The online calibration device for electronic belt scales as described in claim 1, characterized in that, The suspension device includes two frames (4) spanning the conveyor belt, the tops of the two frames being fixed to one end of the head code and the other end of the connecting code at the end via connectors (5).

5. The online calibration device for electronic belt scales as described in claim 4, characterized in that, The top of a frame is fixed to one end of a head code or the other end of a connecting code located at the end via a connector that bypasses a pulley.

6. The online calibration device for electronic belt scales as described in claim 5, characterized in that, A winch is mounted on top of a frame and fixed to a connector.

Images