CN211614297U

CN211614297U - Casting device for metal smelting

Info

Publication number: CN211614297U
Application number: CN201922456391.9U
Authority: CN
Inventors: 李连杰; 俞立锋; 邢维旦; 潘书文; 李洪波; 陈刚
Original assignee: Ningxia Sun Magnesium Industry Co ltd
Current assignee: Ningxia Sun Magnesium Industry Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-02
Anticipated expiration: 2029-12-31

Abstract

The utility model provides a metal smelting is with casting device for to mould pouring metal melt, is used for the heat retaining heat preservation stove of liquid metal, the crucible in the heat retaining heat preservation stove, connect the liquid mechanism of changeing between crucible and mould and be used for the elevating system of lift heat retaining heat preservation stove, change liquid mechanism including "U" type commentaries on classics liquid pipe, be used for going up and down change the thrust mechanism of liquid pipe and make change the vacuum system that produces the pressure differential inside and outside the liquid pipe, its characterized in that changes in liquid pipe one end stretches into the crucible, and another tip downwardly extending forms the circular arc pipe that the opening up, the circular arc pipe end is equipped with the guiding gutter, the guiding gutter extends to the top of mould. The utility model discloses a metal smelting is with casting device can be effective reasonable utilize siphon phenomenon, realizes the infusion process of liquid metal casting, and simultaneously, this device overall sealing performance is good to effectively prevented the pollution and the oxidation of magnesium alloy liquid.

Description

Casting device for metal smelting

Technical Field

The utility model relates to a device is used in the metal smelting, especially relates to a casting device is used in metal smelting.

Background

Currently, most magnesium alloy manufacturers basically adopt a device of manually taking magnesium liquid by a spoon and casting or connecting an electric infusion pump with a casting pipe arranged in the middle to convey the magnesium liquid when casting ingots. The manual ladle is used for magnesium liquid casting, a large number of human interference factors are introduced in the casting process to influence the continuity and the high efficiency of the whole casting process, the automation degree and the operation efficiency are low, the labor intensity of workers is high, the operation environment is severe, and certain dangerousness is realized. The magnesium alloy liquid is directly injected into the casting pipe by the casting centrifugal pump infusion pump to realize automatic casting potential, which is necessary to ensure the continuous operation of the electric infusion pump in the actual casting process, and the casting speed is difficult to control; meanwhile, the energy consumption of a factory is increased, and the loss of the electric infusion pump is accelerated. On the other hand, the impurity distribution in the magnesium liquid is layered, the impurity content of iron, solvent and the like in the magnesium liquid on the upper part of the crucible is low, the impurity content is increased gradually until the bottom of the crucible, the magnesium liquid is always sucked by the electric infusion pump at a position close to the bottom of the heat-preservation crucible, the iron impurity and the solvent impurity cannot be well separated, the iron impurity content difference in the cast magnesium or magnesium alloy ingot is large, and the quality of the cast ingot is easy to be unstable.

The siphon phenomenon is a phenomenon that liquid flows automatically due to pressure difference generated by height difference of liquid levels at two ends of a communicating vessel, and is caused by attractive force and potential energy difference between liquid molecules, wherein the liquid flows from one side with high pressure to one side with low pressure, and the liquid stops flowing until the pressures at the two sides are the same. In view of the above, it is necessary to design a device for delivering liquid metal and realizing casting and smelting by using the siphon phenomenon.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the casting device can effectively and reasonably utilize siphon phenomenon to realize the conveying and casting of liquid metal.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a metal smelting is with casting device for to mould pouring metal melt, is used for the heat retaining heat preservation stove of liquid metal, the crucible in the heat retaining heat preservation stove, connect the liquid mechanism of changeing between crucible and mould and be used for the elevating system of lift heat retaining heat preservation stove, change liquid mechanism including "U" type commentaries on classics liquid pipe, be used for going up and down to change the thrust mechanism of liquid pipe and make and change the vacuum system that produces the pressure differential inside and outside the liquid pipe, change in liquid pipe one end portion stretches into the crucible, another tip downwardly extending forms the circular arc pipe that the opening up, the circular arc pipe end is equipped with the guiding gutter, the guiding gutter extends to the top of mould.

Further, change liquid mechanism still includes the branch pipe, the branch pipe connection vacuum system just be equipped with the valve on the branch pipe.

Furthermore, a proximity switch is further arranged on a branch pipe of the liquid transferring mechanism, and when the liquid metal rises to be close to the valve along the liquid transferring pipe, the proximity switch is triggered to send out a command of closing the valve.

Furthermore, the holding furnace comprises a heating furnace and a crucible arranged in the heating furnace, and the lifting mechanism is a scissor-fork type lifting platform.

The utility model discloses a metal smelting is with casting device can be effective reasonable utilize siphon phenomenon, realizes the infusion process of liquid metal casting. Compared with the prior device which needs an electric infusion pump, the device saves energy, reduces production running cost and maintenance cost, lightens labor intensity of workers and greatly improves production efficiency. The device ensures the stability of the content of casting impurities, and ensures the stability of the liquid level without the impact action of a liquid transfer pump in the casting process. Meanwhile, the device has good integral sealing performance, thereby effectively preventing the pollution and oxidation of magnesium alloy liquid, improving the product percent of pass, reducing the use of harmful protective gases such as sulfur dioxide and the like, and improving the operating environment.

Drawings

FIG. 1 is a schematic structural view of the casting device for metal smelting of the present invention.

FIG. 2 is a schematic structural view of the casting device for metal smelting according to the present invention during casting operation.

Detailed Description

In the following, a casting apparatus 1000 for metal smelting, which is used in the field of metal smelting of magnesium alloy, aluminum alloy, etc. to cast a molten metal mold into a mold 60, will be further described with reference to the accompanying drawings. The casting device 1000 for metal smelting comprises a holding furnace 10, a liquid transfer mechanism 3 and a lifting mechanism 40. The liquid transferring mechanism 3 comprises a liquid transferring pipe 30 for conveying liquid magnesium liquid, a thrust mechanism 301 for controlling the liquid transferring pipe 30 to perform lifting movement, and a vacuum system 50 capable of generating negative pressure inside the liquid transferring pipe 30. The elevating mechanism 40 loads the holding furnace 10, and the elevating mechanism 40 is driven by a hydraulic cylinder 401 to control the elevating or lowering of the holding furnace 10. The heat preservation furnace 10 comprises a heating furnace 101 and a crucible 102 in the heating furnace 101; the liquid transfer pipe 30 is of an inverted U-shaped structure and comprises an inlet end (not numbered) communicated with the crucible 102 and an outlet end (not numbered) extending out of the crucible 102, the outlet end (not numbered) bends downwards and extends to form an arc pipe 20 communicated with the liquid transfer pipe 30, a pipe opening of the arc pipe 20 is vertically upward, and the outlet end (not numbered) of the liquid transfer pipe 30 can be sealed by injecting magnesium liquid into the arc pipe 20.

Liquid pipe assembly 3 is equipped with and can drives liquid pipe 30 and do elevating movement's thrusting mechanism 301, thrusting mechanism 301 can be driven by step motor or pneumatic cylinder. The liquid transfer pipe 30 is further provided with a branch pipe 302 at the horizontal section, the branch pipe 302 is connected with the vacuum system 50, the branch pipe 302 is provided with a proximity switch (not shown) and a valve 303 for connecting and closing the vacuum system 50, wherein the proximity switch can be formed by a temperature sensor or an infrared sensor, and the like, and is used for identifying the distance of the fluid-like high-temperature magnesium liquid from the valve 303.

The heating furnace 101 is a resistance furnace, provides a heat source for the crucible 102, and keeps the optimal casting temperature of magnesium liquid in the crucible 102 to be 700-720 ℃. The lifting mechanism 40 is preferably a scissor-type lifting platform, and is driven to lift by a hydraulic cylinder 401 or a worm gear mechanical mechanism or driven to lift by other power sources such as a stepping motor. In the casting state, the lifting mechanism 40 drives the holding furnace 10 to ascend, so as to keep a port (not numbered) of the liquid transfer pipe 30 below the liquid level of the magnesium liquid, the liquid level of the magnesium liquid in the crucible 102 is always higher than the height of the pipe orifice of the circular arc pipe 20, and the magnesium liquid in the crucible 102 is continuously transferred to the mold 60 through the liquid transfer pipe 30 in the siphon state. After the casting is finished, the lifting mechanism 40 drives the holding furnace 10 to descend, so that the liquid transfer pipe 30 is positioned below the liquid level of the magnesium liquid, the liquid level of the magnesium liquid in the crucible 102 is ensured to be lower than that of the magnesium liquid in the ladle 20, the casting is stopped in a siphoning state.

And the pipe orifice of the circular arc pipe 20 is provided with a guide groove 201 extending out, and a magnesium liquid cast ingot is cast into the mold 60 through the guide groove 201.

The utility model discloses a use: the smelted magnesium liquid is transferred into a holding furnace 10 to be stood so that impurities such as iron, solvent and the like are precipitated at the bottom of the crucible, during casting, a thrust mechanism 301 is started to push the liquid transfer pipe 30 to move downwards, at the moment, the magnesium liquid is scooped and injected into an arc pipe 20 to achieve the purpose of sealing the outlet end of the liquid transfer pipe 30, the inlet end of the liquid transfer pipe 30 communicated with the end of the crucible 102 is immersed in the magnesium liquid in the crucible 102, preferably, the liquid transfer pipe 30 is immersed 200-300mm below the liquid level of the magnesium liquid, and the purity of the magnesium liquid is better. The branch pipe 302 is kept communicated with the vacuum system 50, the vacuum system 50 is started to enable negative pressure to be formed in the liquid transferring pipe 30, magnesium liquid is sucked into the liquid transferring pipe 30, and when the proximity switch detects that the magnesium liquid approaches the valve 303, the proximity switch gives a command to close the valve 303. In the process that the lifting mechanism 40 drives the holding furnace 10 to ascend, the thrust mechanism 301 pushes the liquid transfer pipe 30 to descend, so that the liquid level of the magnesium liquid in the crucible 102 is higher than the height of the pipe orifice of the arc pipe 20, the magnesium liquid is emitted from the pipe orifice of the arc pipe 20, and cast ingots are cast into the mold 60 through the guide grooves. In the above process, the lifting mechanism 40 drives the holding furnace 10 to ascend, so as to keep the inlet end of the liquid transferring pipe 30 below the liquid level of the magnesium liquid, and make the liquid level of the magnesium liquid in the crucible 102 higher than the pipe opening of the circular arc pipe 20 all the time. After the casting is finished, the lifting mechanism 40 drives the heat preservation furnace 10 to descend, so that the liquid level of the magnesium liquid in the crucible 102 is lower than the height of the pipe opening of the arc pipe 20, the siphon state is stopped, and the casting is stopped.

Claims

1. The utility model provides a metal smelting is with casting device for to mould pouring metal melt, is used for the heat retaining heat preservation stove of liquid metal, the crucible in the heat retaining heat preservation stove, connect the liquid mechanism of changeing between crucible and mould and be used for the elevating system of lift heat retaining heat preservation stove, change liquid mechanism including "U" type commentaries on classics liquid pipe, be used for going up and down change the thrust mechanism of liquid pipe and make change the vacuum system that produces the pressure differential inside and outside the liquid pipe, its characterized in that changes in liquid pipe one end stretches into the crucible, and another tip downwardly extending forms the circular arc pipe that the opening up, the circular arc pipe end is equipped with the guiding gutter, the guiding gutter extends to the top of mould.

2. The casting apparatus for metal smelting according to claim 1, wherein: the liquid transferring mechanism further comprises a branch pipe, the branch pipe is connected with a vacuum system, and a valve is arranged on the branch pipe.

3. The casting apparatus for metal smelting according to claim 2, wherein: and a proximity switch is also arranged on the branch pipe of the liquid transferring mechanism, and the proximity switch is triggered to send a valve closing instruction when the liquid metal rises to the proximity valve along the liquid transferring pipe.

4. The casting apparatus for metal smelting according to claim 1, wherein: the heat preservation furnace comprises a heating furnace and a crucible arranged in the heating furnace, and the lifting mechanism is a scissor-fork type lifting platform.