Powder return hopper dust closing device

Abstract

The invention relates to the field of powder return hoppers, in particular to a powder return hopper dust closing device, which comprises an upper powder box, a lower powder hopper, a powder return mechanism and a powder overflow prevention mechanism. According to the powder return hopper dust closing device, due to the arrangement of the powder overflow preventing mechanism, the dust closing device is normally closed by means of the gravity of a partition plate under the condition that feeding is not conducted, feeding is completed only by punching the partition plate open by means of the gravity and impact force of materials during powder return, the partition plate is automatically closed after feeding is completed, the phenomenon that dust overflows during powder return of the powder return hopper is avoided, dust closing effect is realized, through cooperation of a bolt and a limiting nut, the distance between the partition plate and the inner wall of a powder discharging hopper can be flexibly adjusted so as to flexibly control the powder returning and feeding speed, the air suction pipe is additionally arranged at the position of the feeding pipe, micro-negative pressure can be formed in the hopper so as to reduce the dust overflowing phenomenon when materials are fed, and therefore workshop sanitation and production safety are guaranteed. Due to the design that an air suction pipe is arranged on the top, air flow in the powder hopper is downward, a cyclone is formed in the lower powder hopper, and the powder discharging speed is greatly increased.

Description

technical field [0001] The invention relates to the field of powder returning hoppers, in particular to a dust closing device for powder returning hoppers. Background technique [0002] Powder recycling can not only save costs, but also maintain the environment of the workshop and make use of the health of the operators. Most of the powder recycling on the market currently uses the powder pipe of the powder pump to directly extract the powder in the recycling powder hopper. [0003] The following problems in the prior art have not been well resolved: 1. In the existing powder return hopper, the internal partition is simply separated from the feeding port and the feeding port, and has no dust-closing effect; 2. The feeding pipe There is no suction port at the place, and there will be dust overflow during feeding, which will make the workshop hygiene not meet the requirements, and even cause an explosion in the event of an open flame; 3. Due to the concentration of powder and ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a dust-closing device for the powder return hopper to solve the phenomenon of dust overflowing from the powder return hopper when feeding materials in the above-mentioned background technology, and the powder at the lower end of the powder hopper is easy to agglomerate and block the powder pipe

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