System and method for material weighing and weighing controller

A controller and material technology, applied in the direction of continuous material flow weighing equipment, weighing, instruments, etc., can solve the problem of large weighing errors, differences between the weighed value and the expected weighed value, and materials with high precision requirements Weighing does not meet the requirements and other problems
CN102494746AInactive Publication Date: 2012-06-13ZOOMLION HEAVY IND CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ZOOMLION HEAVY IND CO LTD
Publication Date
2012-06-13
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a system and a method for material weighing and a weighing controller. The material weighing system comprises a weighing hopper (40), a spiral conveyor (20), a butterfly valve (30) and a weighing sensor (50). A conveying outlet of the spiral conveyor (20) is located above an opening of the weighing hopper (40), the butterfly valve (30) is located at the conveying outlet of the spiral conveyor (20), and when the butterfly valve (30) is closed, the conveying outlet of the spiral conveyor (20) is sealed. The weighing controller (60) comprises a weight obtaining device (61), a comparison device (62) and a control signal output device (63), wherein the weight obtaining device (61) is used for receiving a signal for indicating weight of materials in the weighing hopper (40) and obtaining real-time weight of the materials from the signal, the comparison device (62) is used for comparing the real-time weight of the materials with a predicting weighing value, and the control signal output device (63) is used for simultaneously outputting a control signal for controlling the stopping of the spiral conveyor (20) and a control signal for closing the butterfly valve (30) when the comparison result of the comparison device (62) is that the real-time weight reaches the predicting weighing value. When the materials reach a certain value, the spiral conveyor and the butterfly valve can be closed simultaneously, thereby obtaining double advantages of good conveying effect of the spiral conveyor and fast response of the butterfly valve.
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Description

technical field

[0001] The invention relates to the field of material weighing, in particular to a material weighing system, a material weighing method and a weighing controller used in the material weighing system. Background technique

[0002] At present, there are generally two ways to weigh the weight of materials. One is to use double butterfly valves for transportation, that is, double butterfly valves are installed at the end of the transportation pipeline. Open both butterfly valves to achieve the maximum delivery channel, and then close one of the butterfly valves when the weighing value is close to the expected weighing value, so that the material delivery outlet becomes smaller, so as to control the weighing accuracy, and finally close the other A butterfly valve. However, this method completely relies on the gravity of the material when conveying the material. Therefore, for the powder with poor fluidity, uniform feeding cannot be achieved, which brings inconve...

Claims

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