CN210877531U

CN210877531U - Argon protective cover for pouring special steel

Info

Publication number: CN210877531U
Application number: CN201922026880.0U
Authority: CN
Inventors: 郑宏升; 郑艳; 张静; 赵新卫; 张参军
Original assignee: Jiyuan Fengyuan Machinery Manufacturing Co ltd
Current assignee: Jiyuan Fengyuan Machinery Manufacturing Co ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-06-30
Anticipated expiration: 2029-11-22

Abstract

The utility model relates to a ferrous metallurgy casting technical field specifically is an argon gas safety cover for special steel pouring, including argon ring, the argon gas pipe, argon gas pipe valve, the sleeve pipe, the safety cover lateral wall, the inside toroidal cavity that is of argon ring, the welding has cask type safety cover lateral wall on the argon ring outer loop, and the argon gas ring bottom is opened there is the long and thin square inlet port of several, the installation in argon gas ring one side of argon gas pipe slope, install the argon gas pipe valve on the argon gas pipe, the welding has cask type sleeve pipe on the argon ring inner loop, and the welding has the ring type upper cover on the cask type sleeve pipe, the sleeve pipe upper end exceeds 2-8MM than argon gas ring, it has the trapezoidal venthole that the several leaned out to open on the ring type upper cover inner loop. This real argon gas safety cover that has novel design improves molten steel quality effect obvious, and the installation is simple, can effectively solve too much argon gas and be drawn into the gating system along with the molten steel stream in, forms subcutaneous bubble, pinhole or the volume sediment quality problem in the ingot casting solidification process.

Description

Argon protective cover for pouring special steel

Technical Field

The utility model relates to a ferrous metallurgy casting technical field specifically is an argon gas safety cover for special steel pouring.

Background

Common special steel comprises carbon steel, high-quality structural steel, alloy steel and the like, the special steel has higher strength, toughness, physical properties, chemical properties, biocompatibility and technological properties, and the special steel has the characteristics of high purity, high uniformity, superfine structure, high precision and the like, so the special steel has stricter requirements on smelting and pouring of high-purity steel, how to avoid secondary oxidation of poured molten steel in the pouring process of a water gap by molten steel is solved, the special steel is very important for improving the product quality, and the argon protection pouring is an effective measure for improving the quality of steel ingots. The existing argon protection equipment is complex in installation and operation, when the argon protection equipment is used, argon is drawn into a pouring system along with molten steel flow, subcutaneous bubbles, pinholes or slag entrapment are formed in the ingot casting solidification process, the product quality is influenced, molten steel easily splashes to an air inlet at the bottom of an argon ring during pouring, a spray hole is blocked, the protection effect is poor, and the molten steel quality improvement effect is not obvious.

Disclosure of Invention

For overcoming the deficiencies of the prior art, the utility model discloses a following technical scheme realizes: an argon protection cover for pouring special steel comprises an argon ring, an argon pipe valve, a sleeve pipe and a protection cover side wall.

The argon ring is internally provided with an annular cavity, the outer ring of the argon ring is welded with a cylindrical protective cover side wall, the bottom of the argon ring is provided with a plurality of slender square air inlets, the argon pipe is obliquely arranged on one side of the argon ring, and the argon pipe is provided with an air valve.

The welding has cask type sleeve pipe on the argon gas ring inner ring, and the welding of cask type sleeve pipe upper end has the annular upper cover, inside division of annular upper cover has the trapezoidal venthole that the several leaned out. The upper end of the cylindrical sleeve is 2-8MM higher than the argon ring. When the argon protection cover is installed at the ladle mouth, let in argon gas, through the long and thin inlet port of argon gas ring bottom, can annotate at the molten steel mouth and flow around forming even annular air curtain, safe effectual protection molten steel avoids taking place the secondary phenomenon of breathing in.

Preferably, the method comprises the following steps: the height of the sleeve is 1/4-1/2 of the height of the side wall of the protective cover.

Preferably, the method comprises the following steps: two or four coupling mechanism's female end are installed to the safety cover lateral wall, are equipped with connecting device's public end on the ladle slide machine component, and public end and female end buckle are connected, can be convenient be connected argon gas safety cover and ladle.

Preferably, the outward inclined surface of the trapezoidal air outlet has an included angle α of 10-35 degrees with the vertical central axis.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the argon protection cover is reasonable in overall structure, a sleeve is welded on the inner ring of the argon ring, the height of the sleeve is only 1/4-1/2 of the height of the side wall of the protection cover, a plurality of long and thin square air inlets are formed in the bottom of the argon ring, in use, argon is connected into the cavity of the argon ring and fills the whole cavity, and then a uniform annular air curtain can be formed around the periphery of molten steel pouring flow of a molten steel opening through the plurality of long and thin square air inlets formed in the bottom of the argon ring, so that molten steel is effectively protected from secondary air suction, and meanwhile, steel slag is prevented from splashing to the air inlet in the bottom of the argon ring to block.

2. The height difference between the upper end of the sleeve and the argon ring and the trapezoid air outlet inside the annular upper cover of the sleeve are adopted, so that the problem that in the later period of pouring, along with the fact that argon is continuously filled into the argon protection cover, the amount of argon in the protection cover is more and more, the pressure is more and more, too much argon is easily drawn into a pouring system along with molten steel flow, and subcutaneous bubbles, pinholes or slag curling quality is formed in the ingot casting solidification process can be avoided.

3. The mode of installing the connecting mechanism on the side wall of the argon protective cover and the ladle opening is adopted, so that the installation is more convenient.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a bottom view of the present invention;

FIG. 3 is an enlarged view of part A of the present invention;

FIG. 4 is an enlarged view of the portion B of the present invention;

fig. 5 is a schematic connection diagram of the present invention.

Reference numerals: 1 side wall of a protective cover, 2 sleeves, 3 argon rings, 4 female ends of connecting mechanisms, 5 male ends of connecting mechanisms, 6 argon pipes, 7 argon pipe valves, 8 ring-shaped upper covers, 9 trapezoidal air outlets, 10 rectangular air inlets, 11 injection pipe interfaces, 12 ladles and 13 ladle nozzles.

Detailed Description

The invention will be described in detail with reference to the drawings attached to the specification, but it should be noted that the invention

The embodiment is not limited to the following embodiments.

As shown in fig. 1-5: an argon protection cover for pouring special steel comprises a protection cover side wall 1, a sleeve 2, an argon ring 3, an argon pipe 6 and an argon pipe valve 7.

Argon ring 3 is flat annular post, and inside is the toroidal cavity, the welding has cask type safety cover lateral wall 1 on the 3 outer rings of argon ring, 1 upper end of safety cover lateral wall flushes with the lateral wall upper end of

argon ring

3, and 3 bottoms of argon ring are opened there is the long and thin square inlet port of several 10, and the installation of 6 slopes of argon pipe is on 3 right sides of argon ring, install pneumatic valve 7 on the argon pipe 6.

The welding has cask type sleeve pipe 2 on the 3 inner rings of argon gas ring, and the welding has annular upper cover 8 on the sleeve pipe 2 top, it has the trapezoidal venthole 9 that the several leaned out to open on the 8 inner rings of annular upper cover. The upper end of the cylindrical sleeve 2 is higher than the argon ring 3 by a distance L =6mm, and the height of the sleeve is 1/2 of the height of the side wall of the protective cover.

Four female ends 4 of the connecting mechanism are installed on the side wall 1 of the protective cover, a male end 5 of the connecting device is arranged on a sliding machine component of the steel ladle, and the male end of the connecting device is connected with the female end of the connecting device in a buckling mode.

The trapezoidal venthole 9 is isosceles trapezoid and goes up the bottom surface length and be 3 times of bottom surface length, and the outer inclined plane of trapezoidal venthole 9 equals 30 with the contained angle a between the perpendicular center pin.

The utility model discloses a work flow is: before casting, the ladle 12 is moved to a casting position, and after the positions of the ladle nozzle 13 and the middle casting pipe 11 are adjusted, the argon protective cover is sleeved on the buckle. After the argon protection cover is installed, part of the ladle nozzle 13 is embedded into the argon protection cover, and the middle injection pipe brick opening 14 extends into the argon protection cover. And (3) opening the steel pouring vehicle to a drainage pouring position, enabling the steel flow of a ladle nozzle 13 to align the middle pouring pipe 11, introducing argon gas of 40^ 60m3/h into the argon ring, downwards spraying the argon gas from a rectangular air inlet hole 10 at the bottom of the argon ring 3 to form a uniform annular air curtain, and finally discharging the argon gas through a trapezoidal air outlet hole 9 on an annular upper cover 8 at the top end of the sleeve 2.

Claims

1. The utility model provides an argon gas safety cover for special steel pouring, includes argon ring, argon gas pipe valve, the sleeve pipe, the safety cover lateral wall, the inside toroidal cavity that is of argon ring, the welding has cask type safety cover lateral wall on the argon ring outer loop, and argon gas ring bottom is opened there is the long and thin square inlet port of several, and installing in argon gas ring one side of argon gas pipe slope, install argon gas pipe valve, characterized by on the argon gas pipe: the welding has cask type sleeve pipe on the argon gas ring inner ring, and the welding has the annular upper cover on the cask type sleeve pipe, the sleeve pipe upper end is higher than the argon gas ring by 2-8MM, open the trapezoidal venthole that has the several to lean out on the annular upper cover inner ring.

2. The argon shield for special steel casting of claim 1, wherein: the height of the sleeve is 1/4-1/2 of the height of the side wall of the protective cover.

3. The argon shield for special steel casting of claim 1, wherein: two or four female ends of the connecting mechanism are arranged on the side wall of the protective cover, a male end of the connecting device is arranged on the component of the steel ladle sliding machine, and the male end of the connecting device is connected with the female end of the connecting device in a buckling mode.

4. The argon shield for special steel casting of claim 1, wherein: the angle a between the outward inclined surface of the trapezoidal air outlet and the vertical central axis is 10-35 degrees.