KR20110060203A

KR20110060203A - Auto coupler device for preliminary treatment apparatus of molten pig iron

Info

Publication number: KR20110060203A
Application number: KR1020090116720A
Authority: KR
Inventors: 박진철; 최명훈
Original assignee: 주식회사 우진
Priority date: 2009-11-30
Filing date: 2009-11-30
Publication date: 2011-06-08
Also published as: DE102010021150A1; CN102080141A; DE102010021150B4; JP2011117067A; JP5351838B2; CN102080141B; KR101100727B1

Abstract

PURPOSE: An auto-coupler device for preliminary treatment device of molten pig iron is provided to improve the service life of auto-coupler by protecting the coupled part from the inflow of foreign materials. CONSTITUTION: An auto-coupler device for preliminary treatment device of molten pig iron comprises an elastic member, a protecting pipe(306), a flange(310), an auto-coupler base(316) and O-ring(314). The elastic member is arranged to surround a cart side pipe. The protecting pipe surrounds the cart side piping and the elastic member. The flange locates on the upper side of the protecting pipe and has a penetration hole connected the top end part of the cart side balance pipe. The O-ring is composed of a Teflon material and is attached to the top of the flange.

Description

AUTO COUPLER DEVICE FOR PRELIMINARY TREATMENT APPARATUS OF MOLTEN PIG IRON}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auto coupler device of a molten iron preliminary treatment plant that makes it possible to improve the quality of molten iron by bubbling an inert gas into a ladle in a steelmaking process.

In the steelmaking process, when the pig iron from the blast furnace is contained and transferred to the converter, the pig iron is loaded into the ladle, and a trolley for carrying the ladle is used. In order to shorten the steelmaking process, it is possible to add a process of removing impurities even when the trolley containing pig iron is loaded and moved. This process is called a molten iron preparation process. And ladles and trolleys made to perform such a charter preliminary treatment process is called a charter preliminary treatment facility. The molten iron preliminary treatment process refers to a process of separating inert material such as phosphorus, sulfur, and gas by supplying an inert gas into the ladle and bubbling molten iron from the bottom of the ladle. At this time, the pipe for supplying the inert gas leads to the ladle side pipe through the pipe on the bogie side, and the coupler device is used for connecting the bogie side pipe and the ladle pipe.

This charter preliminary treatment process is a key process for determining future quality of molten steel. However, in the case of the conventional coupler device, the pipes of the bogie side and the ladle side are mainly manually connected, and in the case of the manual coupler, the work efficiency is very low and the workers are exposed to dangerous conditions by scattered molten steel. .

In addition, even when the auto coupler is used instead of the manual, the area connecting the bogie side pipe and the ladle side pipe was exposed to the outside, so molten steel or slag was scattered when the ladle seated on the bogie or when the bogie moved. There is a problem that the equipment is damaged in the coupling portion of the ladle to replace it from time to time and this requires a lot of time and money.

In addition, in the case of the molten iron preliminary treatment facility, the ladle is tilted before the molten iron is transferred to the converter to remove the slag covered on the molten steel. When the inert gas can be bubbled from the bottom even during the removal of slag, the bubbling effect is maximized, and the slag can be easily displaced to the inclined side of the ladle, so that the side effect of slag removal becomes very easy. Can be. However, in the conventional molten iron preliminary treatment facilities, the ladle is inclined to cause an unbalanced load on the packing between the auto coupler, which causes the packing to be pulled to one side, which causes leakage to the opposite side. As a result, about one third of the inert gas actually injected is released by leaking, which results in a problem that stirring cannot be performed through bubbling while the ladle is inclined.

Furthermore, in the process of coupling the ladle and the trolley, when the ladle is seated on the trolley, the time required to settle the ladle within the allowable range is not large because the left and right deviation between the ladle side pipe and the bogie side pipe is not large. There was a disadvantage of being consumed. In addition, the ladles move frequently and use several ladles alternately in one bogie, and the ladle can be changed in size and shape through long time use. It was so difficult to let them.

The present invention was devised after long research to solve the above problems, and can prevent damage from foreign substances such as splash or slag of molten metal during molten iron and can operate under adverse conditions of the surrounding environment, thus reducing the operating time and quality. And an auto coupler device with improved productivity.

The present invention relates to an auto coupler device for connecting a ladle-side pipe and a bogie-side pipe in a molten iron preliminary treatment equipment, comprising: a plurality of elastic members disposed in a form surrounding the bogie-side pipe; A protective tube surrounding the bogie-side piping and the elastic member; A flange positioned on an upper side of the protective tube and having a through hole connected to an upper end of the bogie side pipe; An auto coupler base supporting the elastic member at a lower end of the elastic member; And an O-ring made of Teflon attached to an upper surface of the flange, and a recess for supporting the elastic member is formed at a position corresponding to the elastic member at a lower portion of the flange and an upper portion of the base. The upper and lower ends of the member are each directly supported by the recess formed in the lower portion of the flange and the upper portion of the auto coupler base.

The present invention also relates to an auto coupler having a plurality of grooves having concentric circles with an O ring at an upper portion of the O ring.

The present invention also relates to an auto coupler, wherein the depth of the recess is 1/10 to 1/5 of the length of the elastic member.

The present invention also relates to an auto coupler further comprising a check valve in the ladle side pipe or the bogie side pipe.

In addition, the present invention is a molten iron preliminary treatment equipment installed on the trolley in the trolley, the seating portion is formed on the side of the ladle, the O-ring is sealed in close contact with the bottom surface of the seating portion by the auto coupler, the bogie side piping And a ladle pre-treatment facility which is coupled so as to be in communication with each other from the pipe to the ladle side, and in which the ladle can be tilted by the tilting device.

According to the present invention, since the coupled portion of the bogie-side pipe and the ladle-side pipe is not exposed to the outside, foreign matter such as splash or slag of the melt does not touch the auto coupling device even when the molten iron is scattered. As a result, the life of the auto coupling device can be improved.

In addition, even when the bogie side pipe and the ladle side pipe are inclined while being coupled to each other, the packing does not lean to one side, thereby making it possible to bubble inert gas into the ladle without leakage. When bubbling of inert gas from the lower portion of the trolley, the slag is driven in the direction in which the trolley is inclined so that a large amount of slag can be easily removed. In this way, when the molten iron is sent to the converter, a leveled and high-quality molten iron can be obtained.

In addition, the permissible tolerances increase when the ladle rests on the bogie, making it easier and faster to settle the bogie. Therefore, it is possible to shorten the time required for seating the ladle on the trolley and to improve the cumbersome work, thereby reducing the operating time and improving the productivity.

Embodiments of the present invention will be described with reference to the drawings.

1: A and 1B is a figure which shows the whole molten iron | metal preliminary processing apparatus. The ladle 100 is provided with a ladle side pipe 102 and a ladle side seating portion 104, and the bogie side pipe 202 for supplying an inert gas such as nitrogen and argon to the base end 204 of the bogie 200 is provided. Each is installed. The cover which protects the trolley | bolt side base end 204 from molten iron | metal, slag, etc. is attached to the trolley | bogie 200. When the ladle 100 is seated on the trolley 200, the ladle side piping 102 and the bogie side piping 202 are connected by the auto coupler device 300. In FIG. 1A and FIG. 1B, although the two auto coupler apparatus 300 are provided on the trolley | bogie side base end 204, the number of auto coupler apparatus 300 is not limited to this.

Ladle side piping 102 may use STPG high pressure piping steel pipe (Sch # 80) to cope with adverse conditions in the field. The bogie-side piping 202 uses the same material as the ladle-side piping 102, but in some cases a flexible steel hose is used to tilt the ladle. In addition, the check valve 116 is used for the ladle side piping 102 to prevent backflow, and such a check valve can also be used for the bogie side piping 202.

Also, as can be seen in FIG. 1B, the trolley 100 can be tilted through the tilting device in a state in which the ladle 100 and the trolley 200 are connected by the auto coupler device 300. The tiltable angle should be sufficient to facilitate slag removal, and the tiltable angle in this embodiment is up to 35 °.

2 is a detailed view of the ladle side seating portion 104. A ladle side seating portion 104 is formed on the side of the ladle 100. One end of the ladle side pipe 102 is connected to the ladle side seating part passage. Since the ladle 100 moves frequently, the ladle side piping 102 and the ladle side seating portion 104 are preferably simple and minimized in construction.

3 is an installation diagram of the auto coupler device 300 of the present invention.

The auto coupler 300 according to the present invention is configured such that an unbalanced load occurs when the ladle 100 is seated so as not to inert gas leakage. The auto coupler device 300 is installed at the balance side base end 204 and the balance side piping 202 is connected. Moreover, on the base end 204, the pair of guide parts 208 are inclined so that the surface which mutually opposes may become closer. The distance between the lower ends of the two guides 208 is substantially the same as the width of the ladle side seating portion 104 so that when the ladle 100 rests on the bogie 200, the seating portion 104 of the ladle 100 rests. Guided by the guide 208, the ladle-side seat passage 108 can be in the correct position on the auto coupler device 300.

4 is a cross-sectional view of the auto coupler device 300, and FIG. 5 is a sectional view taken along the line A-A of FIG. In FIG. 4, the pipe 202 passing through the auto coupler device 300 is surrounded by a double protective tube 306, and a heat insulating material 308 is inserted between the double protective tube 306, so that the protective tube 306 even at a high temperature. ) It prevents the internal components from being deformed.

A flange 310 is disposed on the upper portion of the protective tube 306, and the flange 310 has a through hole connected to one end of the bogie side pipe 202, and one end of the bogie side pipe 202 and the through hole of the bore side pipe 202. The joint is processed to be sealed from the outside by welding or the like. Therefore, when the inert gas is supplied through the bogie side pipe 202, the inert gas exits one end of the pipe 202 and is discharged upward through the through hole 311 of the flange 310 to the ladle 310. It enters the ladle through the ladle side piping 102 via the side seat passage 108.

An O ring 314 is attached to the upper surface of the flange 310. A protrusion 312 is formed on an upper surface of the flange 310, and a portion corresponding to the protrusion 312 is formed at the lower portion of the O ring 314 to couple the flange 310 and the O ring 314. An O ring cover is disposed above the flange 310 and the O ring so as to surround the O ring, and the O ring cover serves to prevent the flange 310 and the O ring 314 from falling upward.

In general, the O-ring 314 selects a material having excellent elasticity rather than a material having a strong strength in order to effectively compress, but in the case of selecting such a material, the O-ring may be easily damaged by tilting the balance. Thus, the O ring 314 of the present invention is made of a strong Teflon material to prevent breakage of this O ring and to withstand ambient heat. By using these materials, the O-rings can be prevented from being easily broken, which saves time and effort in replacing the O-rings.

The O ring 314 is configured as a single piece instead of several existing O rings. The use of multiple O-rings has the disadvantage that the deviations allowed to rest the ladle on the trolley are small, but are advantageous for packing. In the present invention, a plurality of grooves 315 are formed in the upper portion of the O-ring in order to overcome such disadvantages of an integrated O-ring made of Teflon, which has a lack of elasticity but high strength. These multiple grooves 315 are concentric with the o-ring 314 as viewed from above. This makes it possible to secure the seal when the O-ring comes in contact with the bottom of the ladle side seating portion 104. When using an O ring made of Teflon material having high strength but low elasticity, it is more preferable to form such a groove 315 to secure the seal. In addition, since the packing of the ladle-side seating portion 104 is possible only when the passage of the ladle-side seating portion 104 is seated only in a portion where a plurality of grooves 315 are formed, substantially the center of the hole of the ladle-side seating portion 104 and the upper hole of the flange 310 is formed. The left and right deviations can increase.

Four elastic members 302 are arrange | positioned at intervals of 90 degrees between the protection pipe 22 and the trolley | bogie side piping 202 so that the trolley | bogie side piping 202 may be enclosed. In this embodiment, a spring 302 is used as the elastic member 302. The spring 302 is positioned by the shaft 304 fixed below the flange 310. When a load is applied to the flange 310, the flange 310 and the shaft 304 move downward together, thereby elastically compressing the spring 302 downward, so that the elastic force of the spring 302 acts upward. At this time, in the present invention, four springs can be moved independently by removing the departure prevention guide surrounding each spring, unlike the existing.

Hereinafter, the details of the arrangement of the spring without the spring guide for departure prevention will be described in detail. If there is a spring guide for prevention of separation because of this, a plurality of springs do not move each other, they move the same. In this case, it may be advantageous to move the ladle only up and down, but a problem of leakage occurs when the ladle needs to be tilted. In the present invention, recesses 318 and 320 having a predetermined depth are formed in the lower portion of the flange 310 and the upper portion of the auto coupler base 316 at a diameter corresponding to the diameter of the spring. Spring) 302 and shaft 304 were fitted to support the spring.

The depth of the recesses 318 and 320 is preferably 1/10 to 1/5 of the length of the spring. If the depth of the recesses 318 and 320 is less than 1/10, the spring is less effective for supporting the spring, and if the depth of the recesses 318 and 320 exceeds 1/5, the springs are Will interfere with movement. In this case, each spring is positioned by the shaft, the upper part of which is supported only by the recess 318 below the flange 310 and the lower part by the recess 320 above the auto coupler base 316. The two springs are each movable according to the distance between the recess 318 below the flange 310 and the recess 320 above the auto coupler base 316. That is, even when the ladle is inclined, the spring in the inclined direction is relatively short, and the spring located in the opposite direction can be relatively long. For this reason, even if the ladle 100 is inclined, the sealing is not loosened not only in the inclined direction but also in the opposite direction. That is, when the ladle 100 is tilted, the four inner springs 302 of the auto coupler 300 can move independently, so that the same load is applied to the entire portion coupled by the auto coupler 300. It can be. Accordingly, unbalanced load is generated to prevent the trolley 100 from excessively flowing down in the inclined direction, and the sealing is not sufficient in the inclined opposite direction, and leakage of inert gas does not occur in this portion. This makes it possible to bubble inert gas without leaking even in a tilted state.

In the case of the present invention, as a result of integrally configuring the O-ring and supporting the spring through the groove without the spring guide, the left and right deviation from the conventional ± 20 mm to ± 30 mm when the ladle 100 is seated on the trolley 200. It became possible to apply. Thus, ladle 100 can be more easily seated on bogie 200.

The principle of operation of the auto coupler is as follows.

When the auto coupler 300 is mounted to the proximal end 204, the O-ring 314 protrudes upwards by a distance from the top surface of the proximal end 204. Accordingly, when the ladle 100 rests on the trolley 200, the lower end surface of the seating portion 104 contacts the O ring 314 of the auto coupler 300, and the O ring is loaded by the load of the seating portion 104. The 314 and the flange 310 are moved downward so that the elastic force by the spring 302 acts upward. For this reason, the O-ring 314 is crimped by the load of the seating part 104 and the elastic force of the spring 302. For this reason, the space sealed from the outer surface between the ladle side piping 102 and the bogie side piping 202 arises. Therefore, when the inert gas is supplied through the bogie side piping 202, it is possible to prevent the gas from leaking to the outside.

After moving the ladle in the direction of the slag port, the ladle is inclined in the direction of the slag port through the tilting device while the ladle side pipe 102 and the bogie side pipe 202 are coupled to each other. If the ladle is horizontal, the slag cannot be driven to one side through bubbling, but when the inert gas is bubbled in the inclined state, the slag is driven in the tilted direction. Therefore, a large amount of slag driven to one side can be easily removed.

A cleaner capable of purging gas can be provided around the auto coupler 300 to remove dust and the like caught in the O-ring 314. When the ladle 100 is seated, it is possible to purge the gas and the like by removing the dust from the O-ring 314 by giving a command from the PLC so that the foreign matter can be cleaned automatically.

The above-described embodiments of the present invention are merely exemplary, and the present invention is not limited thereto and various modifications and improvements are possible.

Figure 1a is a front view of the molten iron preliminary treatment equipment to which the auto coupler device of the present invention is applied.

FIG. 1B is a view of a molten iron preliminary treatment plant showing a state in which a trolley is tilted through a tilting device. FIG.

2 is a diagram illustrating a ladle of an out-of-furnace refinery of the present invention.

3 is a perspective view of a proximal end of a trolley equipped with an auto coupler device of the present invention.

4 is a side cross-sectional view of the auto coupler device of the present invention.

5 is a cross-sectional view taken along the direction A-A of FIG. 4.

Claims

In the auto coupler device for connecting the ladle-side piping and the bogie-side piping in the molten iron preliminary treatment equipment,

A plurality of elastic members arranged to surround the bogie side pipe;

A protective tube surrounding the bogie-side piping and the elastic member;

A flange positioned on an upper side of the protective tube and having a through hole connected to an upper end of the bogie side pipe;

An auto coupler base supporting the elastic member at a lower end of the elastic member; And

An O ring made of Teflon attached to an upper surface of the flange,

A recess for supporting the elastic member is formed at a lower portion of the flange and an upper portion of the base at a position corresponding to the elastic member.

And the upper and lower ends of the elastic member are directly supported by the concave portions formed in the lower portion of the flange and the upper portion of the auto coupler base, respectively.

The method of claim 1,

And an upper portion of the o-ring having a plurality of grooves concentric with the o-ring.

The method of claim 1,

And the depth of the concave portion is 1/10 to 1/5 of the length of the elastic member.

4. The method according to any one of claims 1 to 3,

And a check valve on the ladle side pipe or the bogie side pipe.

A molten iron preliminary treatment facility installed on a trolley in an auto coupler device according to claim 1,

The seating portion is formed on the side of the ladle,

The O-ring is sealed in close contact with the seat bottom surface by the auto coupler, and is coupled to communicate with each other from the bogie side pipe to the ladle side pipe,

A preliminary coolant installation that can tilt the ladle by a tilting device in a coupled state.