Vacuum pouring oxygen blowing drainage device

Abstract

The utility model relates to the technical field of casting, in particular to a vacuum pouring oxygen blowing drainage device. According to the vacuum pouring oxygen blowing drainage device, the vacuum cavity and the exhaust cavity are formed in the machine shell, the ingot mold is arranged in the vacuum cavity, the flow guide pipe is installed on the ingot mold and communicates with the exhaust cavity, the oxygen pipe and the inert gas pipe are installed on the exhaust cavity, and the air blowing pipe, the stirring mechanism, the oxygen pipe and the inert gas pipe are all located at the bottom of the exhaust cavity; the stirring mechanism is installed in the exhaust cavity, and the air blowing pipe is arranged close to the inner wall of the exhaust cavity and extends into the bottom of the exhaust cavity from the top of the exhaust cavity, so that air in the exhaust cavity can be completely exhausted under the action of inert gas, and molten steel is prevented from generating excessive crystals at a flow guide opening in the bottom of the exhaust cavity. When a pouring procedure is started, the control valve is opened, oxygen is blown into the flow guide opening through the oxygen pipe, and when the oxygen meets a high-temperature molten steel crystallization block, the molten steel crystallization block is burnt and melted, so that the molten steel crystallization block has a good flow guide effect.

Description

Technical Field

[0001] The utility model relates to the technical field of casting, in particular to a vacuum pouring oxygen blowing and drainage device. Background Art

[0002] The traditional method of pouring the tundish for vacuum pouring is to use a stopper rod mechanism to pour in the ladle. During the process from the flushing of the molten steel when the tundish enters to the alignment and placement with the upper part of the vacuum tank, the refractory bricks on the outside of the stopper rod are easily penetrated by the high-temperature molten steel and scalded to damage the stopper rod, making it impossible to open. The contact position between the stopper head brick and the seat brick water inlet is often adhered and cannot be opened. In the past, the effect of inserting a refractory tube into the ladle for oxygen blowing and drainage was quite unsatisfactory, and the bottom of the tundish was directly placed on the tank cover and sealed tightly, making it impossible to blow oxygen and drain. This vacuum pouring method is prone to pouring failure.

[0003] In order to solve this problem, patent number CN206047058U discloses a vacuum pouring oxygen blowing and drainage device, wherein a sliding box mechanism is provided at the bottom of the tundish, the sliding box mechanism includes a sliding box part and a sliding plate, a vent hole and a water outlet hole are provided in the sliding plate, a vent plug is provided in the vent hole, and a water outlet is connected to the bottom of the water outlet hole; the end of the argon pipe is connected to the vent plug, the end of the oxygen pipe is fixedly connected to a quick connector, the quick connector is connected to an extended steel pipe, and the end of the extended steel pipe is arranged in the water outlet hole through the water outlet. Argon is blown into the vent plug through the argon pipe, and the argon makes the molten steel flow to prevent the molten steel from producing excessive crystallization at the pipe mouth of the connecting pipe at the bottom of the tundish; when the pouring stage is started, the water outlet hole on the sliding plate is aligned with the connecting pipe, and oxygen is blown into the connecting pipe through the extended steel pipe. When the oxygen encounters the high-temperature molten steel crystal block, the molten steel crystal block burns and melts, but the device has the problem of incomplete exhaustion when argon is introduced to discharge the gas in the molten steel before pouring, thereby affecting the pouring effect. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art and to provide a vacuum casting oxygen blowing and drainage device.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a vacuum casting oxygen blowing and drainage device, comprising a casing, a vacuum chamber and an exhaust chamber are arranged in the casing, a steel ingot mold is arranged in the vacuum chamber, a guide pipe is installed on the steel ingot mold, the guide pipe is connected with the exhaust chamber, an oxygen pipe, an inert gas pipe, an air blowing pipe and a stirring mechanism are installed on the exhaust chamber, the oxygen pipe and the inert gas pipe are both located at the bottom of the exhaust chamber, the stirring mechanism is installed inside the exhaust chamber, the air blowing pipe is arranged close to the inner wall of the exhaust chamber, and extends from the top of the exhaust chamber to the bottom of the exhaust chamber.

[0006] Furthermore, a guide port is provided at the bottom of the exhaust cavity, and the guide port is communicated with the guide pipe.

[0007] Furthermore, a control valve is installed on the flow guide pipe, and the liquid outlet of the control valve is connected to the ingot mold.

[0008] Furthermore, the oxygen pipe and the inert gas pipe are respectively located on the left and right sides of the guide port and above the control valve.

[0009] Furthermore, the stirring mechanism comprises a driving motor, an output end of the driving motor is provided with a rotating shaft, and a stirring blade is installed on the rotating shaft.

[0010] Furthermore, the driving motor is installed on the top of the casing.

[0011] Furthermore, the exhaust cavity is in an inverted cone shape.

[0012] Furthermore, the blowing pipes include a plurality of blowing pipes, and the air outlets of the plurality of blowing pipes are all located above the inverted cone-shaped opening of the exhaust cavity.

[0013] Furthermore, the vacuum chamber is connected to an exhaust pipe, and the exhaust pipe is connected to a vacuum pump for evacuating the vacuum chamber.

[0014] Furthermore, a cover body is provided on the top of the vacuum chamber, and an opening for connecting the flow guide tube is provided on the cover body, and the opening is interference-fitted with the flow guide tube.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] The present application is provided with a vacuum chamber and an exhaust chamber in the casing, a steel ingot mold is provided in the vacuum chamber, a flow guide pipe is installed on the steel ingot mold, the flow guide pipe is connected with the exhaust chamber, an oxygen pipe, an inert gas pipe, an air blowing pipe, and a stirring mechanism are installed on the exhaust chamber, the oxygen pipe and the inert gas pipe are both located at the bottom of the exhaust chamber, the stirring mechanism is installed inside the exhaust chamber, the air blowing pipe is arranged close to the inner wall of the exhaust chamber, and extends from the top of the exhaust chamber to the bottom of the exhaust chamber, so that the air in the exhaust chamber can be completely discharged under the action of the inert gas, and the molten steel is prevented from producing excessive crystallization at the flow guide port at the bottom of the exhaust chamber. When the pouring program is started, the control valve is opened, and oxygen is blown into the flow guide port through the oxygen pipe. When the oxygen encounters the high-temperature molten steel crystal block, the molten steel crystal block burns and melts. The drainage effect of the present device is good, and the operation is simple, fast and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a vacuum casting oxygen blowing and drainage device in a preferred embodiment of the utility model;

[0018] Figure 2 It is a cross-sectional view of the vacuum casting oxygen blowing and drainage device in the preferred embodiment of the utility model.

[0019] Figure numerals: 1, casing; 2, vacuum chamber; 3, exhaust chamber; 4, ingot mold; 5, guide tube; 6, oxygen tube; 7, inert gas tube; 8, air blowing tube; 9, stirring mechanism; 901, driving motor; 902, rotating shaft; 903, stirring blade; 10, control valve; 11, exhaust pipe; 12, vacuum pump; 13, cover body. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-Figure 2 As shown, a preferred embodiment of the utility model is a vacuum pouring oxygen blowing and drainage device, comprising a casing 1, a vacuum chamber 2 and an exhaust chamber 3 are arranged in the casing 1, a steel ingot mold 4 is arranged in the vacuum chamber 2, a guide pipe 5 is installed on the steel ingot mold 4, the guide pipe 5 is connected with the exhaust chamber 3, an oxygen pipe 6, an inert gas pipe 7, an air blowing pipe 8 and a stirring mechanism 9 are installed on the exhaust chamber 3, the oxygen pipe 6 and the inert gas pipe 7 are both located at the bottom of the exhaust chamber 3, the stirring mechanism 9 is installed inside the exhaust chamber 3, the air blowing pipe 8 is arranged close to the inner wall of the exhaust chamber 3, and extends from the top of the exhaust chamber 3 to the bottom of the exhaust chamber 3, so that the air in the exhaust chamber 3 can be discharged under the action of the inert gas, thereby preventing the molten steel from over-crystallizing at the guide port at the bottom of the exhaust chamber 3. When the pouring procedure is started, the control valve is opened and oxygen is blown into the diversion port through the oxygen pipe 6. When the oxygen meets the high-temperature molten steel crystal block, the molten steel crystal block burns and melts. The device has a good drainage effect and is simple, fast and safe to operate.

[0022] As a preferred embodiment of the utility model, it may also have the following additional technical features: a flow guide port is provided at the bottom of the exhaust chamber 3, and the flow guide port is connected to the flow guide pipe 5; and a control valve 10 is installed on the flow guide pipe 5, and the liquid outlet of the control valve 10 is connected to the ingot mold 4. In this way, the air remaining in the molten steel can be completely exhausted.

[0023] In this embodiment, the oxygen pipe 6 and the inert gas pipe 7 are respectively located on the left and right sides of the guide port and are located above the control valve 10. Therefore, by opening the oxygen pipe 6, the crystallization of molten steel at the guide port during the pouring process can be avoided, which causes the blockage of the guide port; by opening the inert gas pipe 7 to allow the molten steel to flow, excessive crystallization of the molten steel at the guide port can be prevented.

[0024] In this embodiment, the stirring mechanism 9 includes a driving motor 901, the output end of the driving motor 901 is provided with a rotating shaft 902, and the rotating shaft 902 is provided with a stirring blade 903; the driving motor 901 is installed on the top of the housing 1. Thus, the air remaining in the molten steel can be discharged faster.

[0025] In this embodiment, the exhaust cavity 3 is in an inverted cone shape, so as to facilitate the discharge of the molten steel in the exhaust cavity; the blowing pipes 8 include a plurality of blowing pipes, and the gas outlets of the plurality of blowing pipes 8 are all located above the inverted cone opening of the exhaust cavity 3. Therefore, by cooperating with the inert gas pipe 7, the molten steel is prevented from crystallizing on the inverted cone opening.

[0026] In this embodiment, the vacuum chamber 2 is connected with an exhaust pipe 11, and the exhaust pipe 11 is connected with a vacuum pump 12 for evacuating the vacuum chamber; and a cover 13 is provided on the top of the vacuum chamber 2, and an opening for connecting the flow guide pipe 5 is provided on the cover 13, and the opening is interference-fitted with the flow guide pipe 5. Therefore, by starting the vacuum pump 12, the vacuum chamber is kept in a vacuum state, so that the cast steel mold will not be deformed or have bubbles.

[0027] The working principle of the utility model is as follows: molten steel is injected into the exhaust chamber 3 in the casing, and the stirring mechanism 9 is started to stir the molten steel. At the same time, argon gas is injected into the exhaust chamber through the blowing pipe 8 and the inert gas pipe 7 to make the molten steel flow, and the residual air in the molten steel is exhausted, and at the same time, the molten steel is prevented from having excessive crystallization at the guide port; when the pouring program is started, the control valve is opened, and oxygen is blown into the guide port through the oxygen pipe 6. When the oxygen encounters the high-temperature molten steel crystal block, the molten steel crystal block burns and melts. After the molten steel passes through the guide pipe, it flows to the ingot mold 4 in the vacuum chamber 2 for pouring. The device has good drainage effect, simple operation, and is fast and safe.

[0028] Under the premise that no conflict occurs, those skilled in the art may freely combine and superimpose the above-mentioned additional technical features.

[0029] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A vacuum casting oxygen blowing and drainage device, characterized in that: The invention comprises a casing, wherein a vacuum chamber and an exhaust chamber are arranged in the casing, a steel ingot mould is arranged in the vacuum chamber, a guide pipe is installed on the steel ingot mould, the guide pipe is communicated with the exhaust chamber, an oxygen pipe, an inert gas pipe, an air blowing pipe and a stirring mechanism are installed on the exhaust chamber, the oxygen pipe and the inert gas pipe are both located at the bottom of the exhaust chamber, the stirring mechanism is installed inside the exhaust chamber, the air blowing pipe is arranged close to the inner wall of the exhaust chamber, and extends from the upper part of the exhaust chamber to the lower part of the exhaust chamber.

2. The vacuum casting oxygen blowing and drainage device according to claim 1, characterized in that: A guide port is provided at the bottom of the exhaust cavity, and the guide port is communicated with the guide pipe.

3. The vacuum casting oxygen blowing and drainage device according to claim 2 is characterized in that: A control valve is installed on the flow guide pipe, and a liquid outlet of the control valve is communicated with the steel ingot mold.

4. The vacuum casting oxygen blowing and drainage device according to claim 3 is characterized in that: The oxygen pipe and the inert gas pipe are respectively located on the left and right sides of the flow guide port and above the control valve.

5. The vacuum casting oxygen blowing and drainage device according to claim 1, characterized in that: The stirring mechanism comprises a driving motor, an output end of the driving motor is provided with a rotating shaft, and a stirring blade is installed on the rotating shaft.

6. The vacuum casting oxygen blowing and drainage device according to claim 5, characterized in that: The driving motor is installed on the top of the casing.

7. The vacuum casting oxygen blowing and drainage device according to claim 1, characterized in that: The exhaust cavity is in an inverted cone shape.

8. The vacuum casting oxygen blowing and drainage device according to claim 7, characterized in that: The air blowing pipes include a plurality of air blowing pipes, and the air outlets of the plurality of air blowing pipes are all located above the inverted cone-shaped opening of the exhaust cavity.

9. The vacuum casting oxygen blowing and drainage device according to claim 1, characterized in that: The vacuum chamber is connected with an exhaust pipe, and the exhaust pipe is connected with a vacuum pump for evacuating the vacuum chamber.

10. The vacuum casting oxygen blowing and drainage device according to claim 9, characterized in that: A cover body is provided on the top of the vacuum chamber. An opening for connecting the flow guide tube is provided on the cover body. The opening is interference-fitted with the flow guide tube.

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