A high-precision weighing device

Abstract

The invention discloses a high-precision weighing machine which comprises a machine frame, a feeding bin and a controller. A crawler belt conveying mechanism is arranged below an outlet, a material jumping prevention assembly is arranged on a conveying crawler belt, a packaging bag clamping frame is arranged on the outer wall of a material guiding plate, a weighing sensor is arranged on the packaging bag clamping frame, an exhaust inlet is formed in the inner wall of the material guiding plate and a suction fan is connected to the exhaust inlet. In the high-precision weighing machine, the feeding speed is adjusted flexibly by controlling the speed of a driving motor; the material jumping prevention assembly can prevent materials from jumping or rolling after falling onto the conveying crawler belt; the weighing sensor is arranged on the packaging bag clamping frame, so that the weight of a packaging bag is given directly, and a weighing hopper of traditional equipment is omitted, and even if dust is generated when materials enter the packaging bag from the feeding bin, the weighing precision cannot be affected. Compared with the prior art, the high-precision weighing machine has the advantages of being simple and compact in structure, high in weighing precision, high in speed, little in dust and stable and reliable in running.

Description

【Technical field】 [0001] The invention relates to the technical field of weighing tools, in particular to a high-precision weighing device. 【Background technique】 [0002] The existing material packaging scales are all equipped with a weighing hopper. After setting the weight of a single bag on the control instrument, the material falls into the weighing hopper from the finished product silo through the feeding mechanism, and is installed next to the weighing hopper. There is a load cell, and the control system is fixed on the frame next to it, and the total weight value of the weighing bucket, bag gripper, and packaging bag with materials is fed back to the control system in real time, and the value is displayed by the controller. The equipment has the disadvantages of complex structure and slow speed, and when the material is introduced from the weighing hopper into the packaging bag, the dust generated will seriously affect the actual weight of the material in the packagi...

AI Technical Summary

Problems solved by technology

[0002] The existing material packaging scales are all equipped with a weighing hopper. After setting the weight of a single bag on the control instrument, the material falls into the weighing hopper from the finished product silo through the feeding mechanism, and is installed next to the weighing hopper. There is a load cell, and the control system is fixed on the frame next to it, and the total weight value of the weighing bucket, bag gripper, and packaging bag with materials is fed back to the control system in real time, and the value is displayed by the controller. The equipment has the disadvantages of complex structure and slow speed, and when the material is introduced from the weighing hopper into the packaging bag, the dust generated will seriously affect the actual weight of the material in the packaging bag, and the weighing accuracy is low. There are three types of feeding methods: electromagnetic vibration feeding, screw feeding and self-flow feeding. During the feeding process, it is easy to cause more dust, and the stability of the material flow is difficult to control. There is also a self-flow type After feeding, the crawler is used to convey the material. However, when the material is a particle with good fluidity, such as beans, corn, wheat, rice, rice, etc., the item is easy to jump on the conveyor belt, which affects the feeding efficiency and weighing. precision

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