Quantitative magnesium alloy casting pump

Abstract

The invention relates to a quantitative magnesium alloy casting pump. The pump comprises a driving motor, a coupler, a pump shaft, a bearing block, a bearing, connecting rods, a pump barrel, a pump impeller, a pump flange, a pump bottom cover, a pump water inlet, a pump water outlet, a pump height adjusting and positioning hoop and the like. When the quantitative magnesium alloy casting pump is used, the pump barrel is mounted below the liquid level of magnesium alloy melt, the depth of a part, which is immersed into the magnesium alloy melt, of the pump barrel is adjusted as needed, after adjustment of the depth is finished, the pump can be fixed by fastening the pump height adjusting and positioning hoop, during working, the driving motor drives a pump rod and the pump impeller in the pump barrel to rotate at high speed, the magnesium alloy melt is sucked into the pump barrel through the pump water inlet in the middle of the pump bottom cover under the effect of centrifugal force, and then is discharged via the pump water outlet under the effect of the centrifugal force, and thus, the magnesium alloy melt enters a specified melt receiving and delivering device. The shortcomings that in a using process of a traditional quantitative magnesium alloy casting pump, the height cannot be adjusted, slag is easily formed at a position nearby the level line of the magnesium pump, the slag is difficult to clean at high temperature, and cleaning frequency is high are overcome, the height of the pump is adjusted flexibly, the manual cleaning intensity is greatly relieved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a magnesium alloy quantitative pouring pump, which is mainly used in the fields of magnesium alloy casting and the like to provide magnesium alloy melt with high quantitative precision for die casting production, gravity casting and other production. Background technique [0002] In the magnesium alloy die-casting and gravity casting process, a magnesium alloy quantitative pouring device is required to provide a magnesium alloy melt with a relatively accurate weight to the pressure chamber of the die-casting machine or the gravity casting cavity. [0003] At present, the more traditional pouring devices are screw quantitative pumps or rotary vane pumps, both of which are easily stuck by solid slag inclusions in the magnesium melt during use, resulting in the need for frequent cleaning, and the frequency of cleaning has to be cleaned every 24 hours Once, and more difficult to clean up. Due to the above reasons, magnesium alloy ...

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Problems solved by technology

[0003] At present, the more traditional pouring devices are screw quantitative pumps or rotary vane pumps, both of which are easily stuck by solid slag inclusions in the magnesium melt during use, resulting in the need for frequent cleaning, and the frequency of cleaning has to be cleaned every 24 hours Once, and more difficult to clean

Due to the above reasons, magnesium alloy centrifugal quantitative pouring pumps have begun to be widely used in the market. However, although the frequency of magnesium alloy centrifugal quantitative pouring pumps is greatly reduced and the cleaning cycle is greatly prolonged, the magnesium alloy centrifugal quantitative pouring pumps currently on the market, The connection between the pump flange and the pump barrel is connected by a metal pipe. The lower part of the metal pipe is immersed in the magnesium melt. Near the liquid surface line of the magnesium melt, the inner and outer surfaces of the metal pipe are easy to slagging, and the slagging on the inner wall of the pipe is very easy to clean. Inconvenient, which leads to the continuous decrease of the distance between the pump drive shaft and the metal tube, and finally leads to the jamming of the pump drive shaft and the metal tube, resulting in inaccurate quantification of the dosing device

In addition, the current commercially available centrifugal pumps have begun to change the tubular connection structure at the lower end of the pump flange to a structure connected by more than 3 metal columns. The pump flange is fixedly connected, so the height of the pump outlet cannot be adjusted, and the flexibility and adaptability of the pump are greatly reduced. Generally, it can only meet the needs of specific magnesium alloy furnaces. The interchangeability of pumps between different furnace types is greatly reduced, making Users need to prepare different pump spare parts for different furnaces, the capital occupation rate is large, and the management is more complicated

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