Valve scale feed nozzle exhaust apparatus

Abstract

This invention discloses a kind of exhaust device of valve weigher feeder. It includes the following parts, the feeding pipe shelled by the exhaust pipe, the air channel between interior circle of the exhaust pipe and excircle of the feeding pipe. There are air tubes in the channel and air vents in the exhaust pipe and one end of the air tube is connected with the air vents while the other end stretches out of the air channel and links to the air source. The back end of the exhaust pipe is sealed with the feeding pipe and allows of the air vents. The back end of the exhaust pipe is set a connecting plate in which is set a weighing sensor. The back end of the exhaust pipe is covered by the gasbag which two ends are sealed and fixed with the pipe. The exhaust device of valve weigher feeder can be fed with the powder materials and economize them, improve the measuring precision and avoid damping and deteriorating the material in bag, in addition, the bag's mouth is well sealed and not easily damaged. It is suitable for the valve weigher that weighs the packing bag fed with pouring powder materials.

Description

(1) Technical field [0001] The invention relates to an exhaust device. Specifically, it is a valve mouth scale feeding nozzle exhaust device used to fill powdery materials into the packaging bag and weigh them. (2) Background technology [0002] At present, valve scales used to fill powdery materials into packaging bags all use airflow conveying for filling. The feed nozzle of this valve scale is actually a feed pipe. Before filling, first use the bearing pad type clamping mechanism to fix the bag opening of the packaging bag on the front end of the feeding nozzle, that is, the feeding pipe. When filling, start the feeding device, and the powdery material will be sent into the packaging bag through the feeding pipe together with the airflow. This just needs to discharge the gas that enters the packing bag in time. The traditional method is to uniformly process several air outlet holes on the packaging bag. Although the gas entering the packaging bag can be discharged by...

AI Technical Summary

Problems solved by technology

In this way, it will not only cause waste of materials, but also reduce the measurement accuracy.

The second is that there are small air outlet holes on the packaging bag, and the materials in the bag will be in contact with the air through these small holes, which are easy to be affected by moisture and deteriorate.

The third is to use the bearing bush type clamping mechanism to fix the mouth of the packaging bag on the feeding pipe during filling. Not only the mouth of the bag is easily damaged, but the sealing effect is not good during the filling process.

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