Gap-discharging continuous vacuum feeding machine

Abstract

The embodiment of the invention discloses a gas-discharging continuous vacuum feeding machine. The gap-discharging continuous vacuum feeding machine comprises a feeding bin and a discharging bin arranged at the lower part of the feeding bin, wherein a feed opening is formed in one side of the feeding bin; a pneumatic sucking butterfly valve is arranged at the feed opening; a discharging hopper is arranged between the feeding bin and the discharging bin; a convex top plate valve is arranged at the bottom of the discharging hopper in a moving manner; a discharge opening is formed in the bottom of the discharging bin; a pneumatic discharging butterfly valve is arranged at the discharge opening; a filtering bin is also arranged at the upper part of the feeding bin; a left chamber and a right chamber are arranged in the filtering bin; a left chamber blowback airbag, a quick exhaust valve, a left chamber filter element, a left air door and a left air cylinder form a left air passage; a right chamber blowback airbag, a quick exhaust valve, a right chamber filter element, a right air door and a right air cylinder form a right air passage. The invention aims at providing the gap-discharging continuous vacuum feeding machine which has the advantages that continuous feeding can be realized, the conveying efficiency is high, no vacuum source is wasted and both the sucking and the discharging are kept in a uniform-speed smooth state.

Description

technical field [0001] The invention relates to the field of vacuum feeders, in particular to an intermittent continuous vacuum feeder. Background technique [0002] Vacuum feeding machine is also called powder conveying system (abbreviated as PTS), and it is in the stage of general promotion at home and abroad. The equipment reduces dust pollution and saves labor. However, the vacuum feeders currently used at home and abroad are all gap-type, and there are problems such as unsmooth feeding, reverse spraying at the suction port, short conveying distance, and low efficiency. The powder transportation of high distance or large output often adopts positive pressure transportation, using high-pressure fan or compressed air to carry out positive pressure blowing to the long pipeline below which is equipped with related fans to uniformly feed materials to realize dilute phase transportation, and the end of the transportation needs to be equipped with a cyclone Separators, shut-o...

AI Technical Summary

Problems solved by technology

[0006] There are also two defects in the electric vacuum pump as a gap-type vacuum feeder: 1) If the vacuum tube on the top of the vacuum feeder is equipped with a pneumatic three-way ball valve, there will be a large waste of vacuum source, and the vacuum source is used to do work when the material is sucked. , and when switching to unloading, the vacuum pump is switched by the three-way ball valve to suck the outside air without doing work, which means waste of resources; When switching to blanking, the vacuum pump cannot suck the outside air, which will cause the vacuum degree of the vacuum pipe, vacuum tank, etc. to increase to -80 to -90KPa, which is much higher than the vacuum degree (generally -45~-60KPa) when the material is sucked. When it is switched to suction again, it will cause high vacuum to low vacuum. The material that has just been sucked in will be tightly blocked around the filter element group and the equipment cylinder, resulting in unsmooth suction. Compressed air or nitrogen is also difficult to remove clogged material

[0008] After conveying the material for a short period of time, the material cannot be sucked, because the filter element cannot complete self-cleaning during vacuum suction (use compressed air to blow off the filter hole and the surrounding material, so that the filter element is always in a smooth state), resulting in blockage. The vacuum degree in the material tube will gradually decrease, which will gradually cause the inability to absorb the material. If you want to transport it smoothly, you must frequently take out the filter element to clean it or replace it. This brings inconvenience to the user, and the drug is also exposed and Frequent contact with operators makes it impossible to use normally and meet GMP requirements

Images