Clearance arrangement type continuous vacuum feeding machine

Abstract

The embodiment of the invention discloses a clearance arrangement type continuous vacuum feeding machine which comprises a feeding device and a discharging device below the feeding device. The feeding device comprises a feeding bin, a pneumatic material suction butterfly valve, a separation cone hopper, a filer bin and air channel mechanisms, the pneumatic material suction butterfly valve is arranged on the side wall of the feeding bin and used for carrying out feeding, the separation cone hopper is arranged in the feeding bin, the filter bin is arranged above the feeding bin, the air channel mechanisms are arranged above the separation cone hopper and are arranged in a bilateral symmetry mode, the structures of the air channel mechanisms are identical, and the two air channel mechanisms are connected with an electric vacuum pump through vacuum pipes. The electric vacuum pump is electrically connected with a control box. Through the clearance arrangement type continuous vacuum feeding machine, the aim of continuously and permanently conveying materials in a vacuum mode can be achieved without distance limits, the clearance arrangement type continuous vacuum feeding machine has the advantages of being high in conveying efficiency and high in vacuum source utilization rate, meanwhile, material suction and discharging can be kept smooth at constant speed, and dust leakage and potential safety hazards can be eliminated.

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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