Interval continuous vacuum feeder

Abstract

The embodiment of the present invention discloses a row-type continuous vacuum feeding machine, which includes a feeding device and a discharge device located below the feeding device. The feeding device includes a feeding bin, and a The structure of the pneumatic suction butterfly valve for feeding on the wall, the separation cone located in the feed bin, the filter bin above the feed bin, and the left and right symmetrical arrangements above the separation cone is the same The air duct mechanism; the two air duct mechanisms are connected with an electric vacuum pump through a vacuum tube; the electric vacuum pump is electrically connected with a control box. With the present invention, the purpose of continuous and long-lasting vacuum conveying of materials can be realized without being limited by distance, and it has the characteristics of high conveying efficiency and high utilization rate of vacuum source. leaks and safety hazards.

Description

technical field [0001] The invention relates to a vacuum feeder, 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-off fans and ...

AI Technical Summary

Problems solved by technology

[0004] 1. The efficiency is low, the material is not unloaded when the material is sucked, and the material is not sucked when the material is unloaded, and the material is not conveyed continuously in time but is staggered;

[0005] 2. The delivery output is unstable, especially when the pneumatic jet vacuum generator is used as the vacuum source, because the vacuum depends on the compressed air to generate, and the pressure of the compressed air often fluctuates between 0.4~0.8MPa, so the vacuum degree of the vacuum generator is also As the compressed air pressure fluctuates from time to time, the conveying speed of the corresponding gap vacuum feeder will also change from time to time with the change of vacuum degree.

The square structure of the jet vacuum generator itself can only withstand the gap-type vacuum generation, and cannot withstand vacuum for a long time

[0006] The most economical is the electric vacuum pump, but the electric vacuum pump also has two defects when used as a gap 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. The vacuum source is used to do work when the material is sucked, and the vacuum pump is switched by the three-way ball valve to suck the outside air without doing work when switching to feeding, which is a waste of resources; 2) If the vacuum tube on the top of the vacuum feeder is equipped with a pneumatic The ball valve has materials clogging the filter element group. Because the vacuum pump cannot suck the outside air when switching to feeding, the vacuum degree of the vacuum pipeline and vacuum tank increases to -80 to -90KPa, which is higher than the vacuum degree (generally -45KPa) when the material is sucked. ~-60KPa) is much higher, when switching to suction again, it will cause high vacuum to low vacuum, and the material just sucked in will be tightly blocked around the filter element group and the equipment cylinder, resulting in unsmooth suction and unloading When the gas storage tank blows back a large amount of compressed air or nitrogen in an instant, it is difficult to remove the clogged material

The material to be conveyed cannot be sucked after a short period of time, because the filter element cannot complete self-cleaning (use compressed air to blow off the filter holes and surrounding materials to keep the filter element unblocked) during vacuum suction, causing blockage. If the vacuum in the suction pipe is blocked, the vacuum degree 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, which brings inconvenience to the user and the drug is also used. Exposure and frequent contact with the operator can not be used normally and meet the requirements of GMP

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