KR20050017546A - Apparatus for warming molten steel in ladle - Google Patents

Abstract

PURPOSE: To provide an apparatus capable of reserving heat of molten steel in ladle by covering a cover on the ladle and injecting a heat reserving material into molten steel contained in the ladle through a nozzle installed inside the cover in a process of transferring a transfer car on which a ladle containing molten steel is loaded to a mini-mill process. CONSTITUTION: An apparatus(100) for reserving heat of molten steel in ladle(30) comprises a ladle cover(110) which is covered on the ladle placed on a transfer car(10), and in which a through hole is formed; a cover driving unit(120) disposed on the transfer car with being spaced from the ladle in a predetermined distance in an upper part of the ladle such that the cover is attached to the ladle or detached from the ladle; a heat reserving material storage unit(170) disposed on the transfer car with being spaced from the ladle; and a heat reserving material injection unit for injecting a heat reserving material into the ladle through a nozzle mounted on the through hole of the cover from the heat reserving material storage unit, wherein the heat reserving material injection unit transfers the heat reserving material by air, and power required for flowing the air is obtained from wheels(14) of the transfer car.

Description

Thermostat of molten steel in ladle {APPARATUS FOR WARMING MOLTEN STEEL IN LADLE}

The present invention relates to a thermal insulation device for molten steel in the ladle, and more particularly, to cover the ladle in the process of transporting the ladle containing the molten steel in the trolley to the mini-mill process and the thermal insulation material through the nozzle installed in the cover The present invention relates to a thermostat of molten steel in a ladle capable of warming molten steel by injecting it into molten steel.

After the removal of impurities from the steel mill, the molten steel is placed on a ladle, covered with a ladle, and the ladle is loaded into a railroad car by a crane and transported to a mini mill playing process. When the cradle containing the molten steel arrives at the mini mill playing process, the ladle is unloaded by a crane, the cover is removed, the ladle is preheated, and the molten steel is supplied to the tundish of the playing process or directly to the tundish without preheating.

This transport operation has a problem that the waiting time is long, such as repeatedly using the crane. In addition, the molten steel exposed to the atmosphere decreases in temperature due to the increased transport distance and waiting time during the transportation from the steel mill to the mini mill plant along the track. Therefore, the particle insulation may be added by hand before driving.

Therefore, the present invention has been made to solve the above-described problems of the prior art, an object of the present invention is to cover the ladle in the process of transporting the ladle containing molten steel in the trolley to the mini-mill process through a nozzle installed in the cover It is to provide a thermostat of the molten steel in the ladle that can insulate the molten steel by injecting the insulation to the molten steel in the ladle.

According to an aspect of the present invention for achieving the above object of the present invention, there is provided a thermostat of molten steel in a ladle. The molten steel thermostat in the ladle includes a ladle cover having a hole to be covered on the ladle seated on the trolley; A lid drive unit disposed in the trolley away from the ladle on the ladle by a predetermined distance to attach and detach the lid to the ladle; An insulating material storage unit disposed on the trolley away from the ladle; And a thermal insulation material input unit for introducing a thermal insulation material into the ladle through a nozzle mounted in the through hole of the cover from the thermal insulation material storage container.

Various features and advantages of the present invention will be described in detail as follows in connection with the accompanying drawings.

1 is a perspective view of a molten steel thermostat in a ladle according to a preferred embodiment of the present invention installed on a trolley. Referring to Figure 1, the molten steel thermostat 100 in the ladle according to the present invention is installed on the top plate 12 of the trolley 10 for carrying the ladle 30 containing the molten steel.

The molten steel thermostat 100 includes a ladle cover 110 detachable from the ladle 30 seated on the trolley 10; Cover drive unit 120 disposed on the top plate 12 of the trolley 10 away from the ladle 30 on the ladle to detach the cover 110 to the ladle 30 by a predetermined distance ; A thermal insulation material storage unit (170) disposed on the upper plate (12) of the trolley (10) away from the ladle (30); And a thermal insulation material input unit 180 for introducing a thermal insulation material into the ladle 30 through a nozzle 210 installed in the through hole of the cover 110 from the thermal insulation material storage unit 170.

FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1, and FIG. 3 is an enlarged front view of the portion B of FIG. 1. Hereinafter, the configuration of the lid driving unit 120 will be described with reference to FIGS. 2 and 3.

The lid drive unit 120 has sliding guides 126 and 128 to smoothly move the rack 124 connected to the air cylinder 122 as shown in FIG. 3, and the pinion 130 is provided on the rack 124. ) Is engaged to convert the linear motion of the cylinder 122 into a rotational motion.

The rotational motion of the pinion 130 is decelerated by the speed reducer 132, and the speed reducer 132 is coupled to the pinion 130 to transfer the rotational motion of the pinion to the first bevel gear 134, which is the first bevel. A bearing 136 rotatably supporting the gear 136, a second bevel gear 138 meshing with the first bevel gear 134, and changing a direction of rotational movement, and a lower end of the second bevel gear 138; Bearings 140 and 142 rotatably supporting the top. At this time, these first and second bevel gears 134 and 138 are preferably configured to increase torque while reducing the speed of the rotational movement.

The housing 144 coupled to the reducer 132 by the coupling 146 is disposed above the reducer 132. The housing 144 is equipped with a guide roller 147 at the bottom, and the slide guide 148 is connected to the outer circumference of the reducer 132 and the housing 144, so that the reducer is centered on the axis of the second bevel gear 138. It can rotate smoothly with respect to 132.

A cylinder 150 is mounted on an upper end of the housing 144, and a pair of guide members 152 are slidably inserted into the upper surface of the housing 144 on both sides of the cylinder 150. It is attached to the bottom of the head 154 together.

The head 154 is penetrated by the beam 156 to be integrally coupled, and the beam 156 has a front end 156a extending longer than the rear end 156b so that the front end 156a is the ladle cover 110. Grip (把持). A weight 158 is slidably attached to the rear end 156b of the beam 156 and a pair of cylinders 114 (only one is shown) on both sides of the beam 156 between the weight 158 and the head 154. Is mounted to reciprocate the weight 158 relative to the head 154.

In the lid drive unit 120 having such a configuration, the expansion and contraction of the cylinder 122 is converted into rotational movement by the rack 124 and the pinion 130, and the rotational movement is converted into the first and second bevel gears. Direction and deceleration by 134 and 138 causes the housing 144 and the beam 156 to rotate, so that the lid 110 also rotates. On the other hand, the head 154 and the beam 156 is moved up and down by the expansion and contraction of the cylinder 150 to detach the cover 110 to the ladle 30. In addition, by the operation of the cylinder 160, the weight 158 slides in the beam 156 to keep the center of gravity of the entire lid driving unit 120 constant.

4 is a cross-sectional view taken along line C-C of FIG. 1. 4 is shown with a portion of the thermal insulation material storage unit 170 of the molten steel thermal insulation device 100 according to the present invention.

The thermal insulation material storage unit 170 is a storage container 172 having an internal space for storing the thermal insulation material (M), the insulating material transfer screw 174 disposed in the storage container 172 and the storage container 172 It is mounted to the top includes a motor 176 to rotate the screw 174.

FIG. 5 is a side view seen in the direction of an arrow D in FIG. 1 and shows a part of the thermal insulation material input unit 180. Referring to FIG. 5 together with FIG. 4, the thermal insulation material input unit 180 covers the portion 110 for discharging and temporarily storing the thermal insulation material M from the thermal insulation material storage container 172 (FIG. 4) and the discharged thermal insulation material M (110). It consists of a part (FIG. 5) supplied to the nozzle 210 arrange | positioned at ().

First, referring to FIG. 4, the plate-shaped gate valve 182 operated by the cylinder 184 is installed to open and close the lower portion of the thermal storage material storage container 172. The heat insulating material discharged from the storage container 172 through the gate valve 182 is temporarily stored in the gate 186 of a predetermined space formed under the gate valve 182, and then the supply cylinder 190 by expansion of the piston 188. Is moved to. The insulation is then carried in the (preferably high pressure) air supplied from the air tank 208 and transferred to the nozzle 210 in the lid 110 via the transfer line 192.

Meanwhile, referring to FIG. 5, one of the wheels 14 of the trolley 10 has a shaft 194 attached thereto, and one end of the link 198 is coupled to the shaft 194 via a bearing 196. . The other end of this link 198 is pinned to a yoke 202 mounted at the rod end of the piston pump 200. The piston pump 200 also has an inlet 204a communicating with the outside and an outlet 204b connected to the air tank 280 via the air line 206.

Since the vehicle 10 is driven and the wheel 14 rotates, the link 198 converts the rotational motion of the wheel 14 into linear motion, and the piston pump 200 supplies air by the linear motion. The air is supplied to the air tank 208 (preferably compressed above a predetermined pressure).

The (compressed) air stored in the air tank 208 is supplied to the transfer line 192 to transfer the thermal insulation material from the supply container 190 to the nozzle 210 in the cover 110.

FIG. 6 is an enlarged view of portion E of FIG. 2, FIG. 7 is an enlarged view of portion F of FIG. 6 showing a closed state of the nozzle, and FIG. 8 is an enlarged view of portion F of FIG. 6 showing an open state of the nozzle. .

6 to 8, the through hole of the cover 110 includes a plurality of nozzles 210 connected to the transfer line 188, and an air breather 230 for discharging heat and gas inside the ladle 30 to the outside. An air breather is installed. The interior of the ladle 30 is connected to the outside by these nozzles 210 and the air breather 230.

The nozzle 210 has a pair of adapters 212 and 214 coupled to each other, and one spool 216 is disposed in a space between the adapters 212 and 214, and the spool and the adapters 212 and 214 are arranged. The spring 218 is arrange | positioned in between. The adapters 212, 214 are sealed to each other by a seal 220, and the adapter 214 is sealed to the lid 110 by a seal 222.

When the air and powder insulation mixture is supplied to the nozzle 210, it pushes the spool 216 inside the nozzle 210 to connect the channel C1 of the adapter 212 and the channel C2 of the spool 216 (FIG. 8) Then, it is sprayed on the upper surface of the molten steel to insulate the molten steel. At the end of the supply, the spring 218 causes the spool 216 to return to the position in FIG. 7 to prevent the gas inside the ladle 30 from flowing back through the nozzle 210 to the transfer line 192.

Hereinafter, the operation of the molten steel thermostat 100 according to the present invention having the configuration described above. First, when the ladle 30 is seated on the ladle seat 16 of the trolley 10, the ladle sensor 18 detects this and notifies a controller (not shown) in the cab 20. Accordingly, the controller operates the cover driving unit 120 to cover the ladle 30 with the cover 110. The operation may be set manually, and when the controller notifies the worker through an indicator (not shown) or the like, the operator may operate the controller or the like to operate the lid driving unit 120. Subsequently, the controller operates the thermal insulation material storage unit 170 and the thermal insulation material input unit 180 to inject the thermal insulation material M in the thermal insulation material storage container 172 into the molten steel inside the ladle 30 through the nozzle 210. Will keep warm. This warming operation is carried out immediately after the ladle 30 is seated on the seat 16, otherwise may be carried out according to a predetermined time or other conditions.

According to the molten steel thermostat in the ladle according to the present invention as described above, in the process of transporting the ladle containing the molten steel in the trolley to the mini-mill process cover the ladle and the heat insulating material through the nozzle installed in the cover By inject | pouring into molten steel, molten steel can be insulated.

Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art may vary the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be appreciated that modifications and variations can be made.

1 is a perspective view of a molten steel thermostat in a ladle according to a preferred embodiment of the present invention installed on a trolley.

2 is a cross-sectional view taken along the line A-A of FIG.

3 is an enlarged front view of the portion B of FIG. 1;

4 is a cross-sectional view taken along the line C-C of FIG.

FIG. 5 is a partial side view seen in the direction of the arrow of FIG. 1. FIG.

6 is an enlarged view of a portion E of FIG. 2.

7 is an enlarged view of a portion F of FIG. 6 showing a closed state of the nozzle;

8 is an enlarged view of a portion F of FIG. 6 showing an open state of the nozzle;

<Explanation of symbols of main parts in drawings>

110: cover 122, 150, 160, 184: cylinder

172: storage container 204: air pump

208: air tank 192: transfer line

210: nozzle

Claims (2)

A ladle cover with perforations overlaid on the ladle seated on the trolley; A lid drive unit disposed in the trolley away from the ladle on the ladle by a predetermined distance to attach and detach the lid to the ladle; An insulating material storage unit disposed on the trolley away from the ladle; And Insulating material input unit for injecting the insulating material into the ladle through the nozzle mounted in the through hole of the cover from the insulating material storage container The thermostat of the molten steel in the ladle characterized in that it comprises a. The apparatus of claim 1, wherein the insulation material feeding unit transfers the insulation material by air and obtains the power required for the flow of air from the wheel of the bogie.