Powder conveyer device

Abstract

The invention relates to a powder conveyer device. The powder conveyer device comprises a pump body, a powder absorption plunger, a powder absorption pipe, a powder discharge pipe, a powder absorption pipe switch valve and a powder discharge pipe switch valve, wherein the pump body is internally provided with a conveying cavity; the conveying cavity is provided with a powder inlet connected with the powder absorption pipe; the conveying cavity is provided with a powder outlet connected with one end of the powder discharge pipe; the powder absorption plunger is arranged inside the conveying cavity and can slide up and down along the conveying cavity; when the powder absorption plunger moves upwards, the powder absorption pipe switch valve opens the powder absorption pipe, the powder discharge pipe switch valve closes the powder discharge pipe, and powders are sucked into the conveying cavity from the powder absorption pipe; when the powder absorption plunger moves downwards, the powder absorption pipe switch valve closes the powder absorption pipe, the powder discharge pipe switch valve opens the powder discharge pipe, and the powders are discharged through the powder discharge pipe from the conveying cavity; the powder inlet is placed on the inner side wall of the conveying cavity; and the powder inlet is higher than the powder outlet. The powders are more smoothly fed into the powder conveyer device when the powder conveyer device feeds with the powders, so that the powder feeding quantity and the powder feeding stationarity can be improved. As the powder discharge pipe switch valve can perform superposed powder discharge, the waving of the discharged powders is eliminated, and the stationarity and the stability of the discharged powders can be improved.

Description

1. Technical field [0001] The invention relates to a powder conveying device, which is mainly used for conveying solid powder medium. 2. Background technology [0002] Currently known powder conveying devices operate according to the Venturi principle, in which the powder is carried by a gas flow. Such devices are simple in structure, but they have the following three drawbacks. Firstly, the achievable powder concentration in the gas flow is very low and the powder is transported by gas entrainment, i.e. the carrier gas velocity must be greater than the minimum hover velocity of the powder. Second, the consistency of the amount of powder delivered can fluctuate over time. In addition, it is difficult to accurately adjust the amount of powder. These deficiencies are exacerbated when Venturi pumps deliver powder coatings, as the final powder coating can fluctuate significantly over time in terms of film thickness and visual quality. [0003] Consequently, transport solutio...

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Problems solved by technology

[0010] 1) Both the powder inlet and the powder outlet at the bottom of the conveying chamber are located at the bottom of the powder conveying chamber, so when the powder is sucked, the powder will be blocked by the powder that has entered the conveying chamber before, which is not conducive to absorbing more powder into the conveying chamber, that is The existing powder inlet has the problem of unsmooth powder feeding;

[0011] 2) The original design tends to cause some powder with poor flow properties to stay in the bottom area of ​​the conveying chamber, making it difficult to transport normally and easily blocking the powder outlet channel;

[0012] 3) When the original powder pump is delivering powder, the air flow is controlled intermittently or continuously, which will be affected by the intermittent work of the powder suction plunger of the powder pump and become discontinuous powder delivery, resulting in uneven powder delivery. question

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