The electronic belt scale is equipped with a scale on the belt conveyor. When the material passes through the belt conveyor, the gravity on the scale is measured, and the belt speed is measured, and then the instantaneous flow and accumulated flow of the material are obtained in the secondary instrument.
Electronic belt scale
basic data
When designing an electronic belt scale, at least the following basic data should be prepared:
Weighing material type;
Zui large weighing flow (t / h, kg / h);
Belt scales are used;
The accuracy required by the belt scale;
The condition of the belt conveyor;
Belt scale test and test conditions.
Design choice point
The choice of electronic belt scales is relatively complicated. When a choice is missed, it usually results in the use of an electronic belt scale that does not meet the design requirements or is completely unusable.
The use of belt scales can be roughly divided into process monitoring scales, measuring scales and trade settlement scales. The process monitoring scale is mainly used to monitor process parameters; the meter is used for the measurement of important raw materials of enterprises or the internal economic accounting of enterprises; the scale of trade settlement is used for material measurement between enterprises. The purpose of the belt scale is different. There are big differences in design choices. Taking the structure of the susceptor as an example, the process monitoring scale has a simple structure and a small number of weighing rolls, while the weighing scale and the trade settlement floor structure are more complicated, and the weighing roller group is more.
The use of electronic belt scales usually determines the required accuracy. Process monitoring scales do not require high measurement accuracy, usually 1% to 3%; the measurement scale is the company's important raw material measurement or internal economic accounting, and the measurement accuracy requirements are relative. Higher, generally 0.5%? 1%; used for the scale of trade settlement of materials measurement between enterprises, the measurement accuracy is high, should reach 0.25%? 0.5%. It can be seen that the intended use of the belt scale usually also determines the accuracy of its requirements, but before the selection, the exact accuracy requirements still need to be made.
The weighing process of the electronic belt weigher is realized indirectly by means of a conveyor belt. The condition of the belt conveyor is not good, and the accurate measurement is not at all. Therefore, the condition of the belt conveyor must be fully understood before design. The main contents of the belt conveyor are as follows:
Belt conveyor cross-sectional shape (horizontal, inclined, convex arc, concave arc, concave arc and convex arc, etc.).
The length of the belt conveyor (m) before the center of the rear drum or the full length of the belt.
The inclination of the belt conveyor (including variable zui large and zui small inclination).
The belt conveyor uses a tension adjustment device (screw type mounted on the rear drum, vehicle-mounted and vertical type mounted on the drum).
The number and variation of the material receiving points of the belt conveyor (if there are 3 receiving points, 1 or 2 receiving points in normal operation).
Belt conveyor width (mm).
Belt conveyor material flow changes (large, small, basically stable).
Belt belt conveyors (such as single-layer flat rolls, three-stage grooved rolls, including grooved idler groove angles).
Is there a unloading cart or unloading plow on the belt conveyor?
Belt conveyor belt condition (new and old, severe damage, number of belt splicing stages, belt joints are mechanical clamps, and even cemented). The basic conditions of the belt conveyor (vibration, shaking or fastening).
The following belt conveyor conditions are conducive to achieve higher weighing accuracy: belt conveyor horizontal or fixed forming, belt conveyor length is moderate, belt conveyor without tilt or tilt, belt conveyor with vertical tension The adjustment device, a point of the belt conveyor, the material flow rate of the belt conveyor is basically stable. The type of belt conveyor roller is single-stage flat drum or 3 slots below 35°. The belt conveyor is not equipped with unloading cart or unloading plough. The belt conveyor is in good condition with uniform joints and joints. Belt conveyor Have a solid foundation.
The verification and test conditions of the belt scale are the key to ensuring the normal use of the electronic belt scale. The contents of the calibration and testing should be determined in advance to provide the necessary facilities for verification and testing. Commonly used verification and testing methods include hanging code testing, rolling chain testing, cyclic chain testing and material testing.
However, whether it is hanging code testing, rolling chain testing or cyclic code testing, material testing cooperation is still needed. Therefore, it is necessary to design some facilities for material testing, such as inspection doors, collection pipes, test hoppers and experimental hopper scales. The design should consider whether the material is weighed (ie weighed in advance) before entering the electronic belt scale or weighed after the electronic belt scale (ie after weighing). When weighing in advance, it is necessary to consider how the weighing material is added to the belt; when weighing later, it is necessary to consider how the material is collected and where the material is returned. These problems should be identified during design and equipped with appropriate equipment, otherwise it will bring great difficulties to material testing.
We are a professional Chinese manufacturer of Soil Redeposition Material;we supply various products of Soil Conditioner, and can providing product images and basic parameters with each Soil Water Retainer. Such as Humic acid, fulvic acid, brown sauric acid, green sauric acid, black sauric acid and so on. Look forward to your cooperation!
Soil Conditioner,Soil Redeposition,Soil Recuperation,Soil Water Retainer
Xi'an Quanao Biotech Co., Ltd. , https://www.quanaobiotech.com