Molten iron guided unmanned apparatus of pig casting machine

Abstract

The unmanned molten iron guiding device of a blast furnace casting machine according to the present invention comprises guide rails installed on a base frame adjacent to a runner between a molten iron ladle of the casting machine and a mold for manufacturing pig iron, a main frame that moves along the guide rails by a transfer unit, a lifting frame that is raised by a lifting unit installed on the main frame, an arm that is slidably installed on the lifting frame and has a slag removal tool at its end for removing slag from the runner, and an arm forward / backward unit installed on the lifting frame that moves the arm forward and backward to remove slag from the runner using the slag removal tool installed at the end of the arm.

Description

Technology Field

[0001] The present invention relates to a blast furnace casting machine, and more specifically, to an unmanned device for guiding molten iron in a blast furnace casting machine for removing slag in the runner and guiding molten iron to supply molten iron from the molten iron ladle to the mold for producing pig iron ingots. Background Technology

[0002] Generally, pig iron (cold iron, shaped iron, or casting iron) is molten iron produced in a blast furnace, that is, molten iron, that is, is cooled or solidified into a specific shape and is used as an iron source.

[0003] The method for manufacturing cast iron involves tapping molten iron from a blast furnace and then transferring the tapped molten iron to a casting machine using a Topedo Ladle Car (TLC). After supplying the molten iron to a ladle, the molten iron contained in the ladle is sequentially poured through a runner into strand molds, that is, molds that are installed on an endless track chain for continuous operation and have open tops. The molten iron poured into the strand molds is cooled and solidified within the moving molds, thereby producing block-shaped cast iron.

[0004] As described above, in the process of manufacturing pig iron, slag generated by the contact of water impurities of the molten iron with the atmosphere remains and grows in the runner where the molten iron moves from the ladle to the molds. This oxidized slag poses a problem in that it prevents the molten iron from being smoothly supplied to the molds of the strands.

[0005] In particular, molten steel or slag exists in an emulsion state, and since molten steel or slag in an emulsion state has strong adhesive properties, it adheres to and grows along the edges of the runner, which changes the movement trajectory of the molten iron and increases the risk of safety accidents.

[0006] Korean Patent Registration No. 10-1424640, Registered Patent No. 10-1424643, and Registered Patent No. 10-1424641 disclose a method for manufacturing pig iron for casting.

[0007] In addition, Korean registered patent No. 10-1100479 discloses a method for manufacturing pig iron ingots. The disclosed manufacturing method includes the step of mixing the molten iron and pig iron by adding pig iron to a molten iron ladle; and the step of pouring the mixed molten iron and pig iron into a mold of a casting machine.

[0008] In the process of carrying out this method of manufacturing pig iron ingots, a runner is used to pour molten iron from a molten iron ladle into a mold. However, as described above, there are still problems with slag caused by reduced fluidity of some molten iron flowing through the runner and oxidation of impurities in the molten iron.

[0009] Therefore, conventionally, to ensure the smooth flow of molten iron during operation, workers use separate tools to remove the slag, but this results in relatively low efficiency in removing high-temperature slag and carries a high risk of many accidents.

[0010] Korean Patent No. 10-1159949 discloses a casting machine mold and an apparatus for manufacturing pig iron using the mold. Prior art literature

[0011] Republic of Korea Patent Registration No. 10-1424640, Republic of Korea Registered Patent No. 10-1424643, Republic of Korea Registered Patent No. 10-1100479, Republic of Korea Registered Patent No. 10-1159949 The problem to be solved

[0012] The present invention aims to solve the problems described above by providing an unmanned molten iron guide device for a blast furnace casting machine that is installed on a side adjacent to the runner for supplying molten iron from the ladle to the mold side, and prevents the reduction of some molten iron flow due to oxidation slag grown in the runner and cooling. means of solving the problem

[0013] The unmanned molten iron guiding device of the blast furnace casting machine according to the present invention for achieving the above objective comprises: guide rails installed on a base frame adjacent to the runner between the molten iron ladle of the casting machine and the mold for manufacturing pig iron; a main frame that moves along the guide rails by a transfer unit; and

[0014] A lifting frame that is raised by a lifting unit installed on the main frame, and

[0015] An arm slidably installed on the above lifting frame and equipped with a slag removal tool at its end for removing slag from the runner, and

[0016] The invention is characterized by having an arm forward / backward unit installed on the lifting frame, which moves the arm forward and backward to remove slag from the runner using a slag removal tool installed at the end of the arm.

[0017] In the present invention, the transfer unit comprises a pair of head sprockets installed on a first drive shaft rotatably installed on one end of a base frame, a pair of tail sprockets installed on a second drive shaft installed on the other side of a main frame, chains that are respectively engaged with the head sprockets and tail sprockets and have both ends installed on the main frame, and a first drive motor installed on the base frame to drive the first drive shaft on which the head sprockets are installed.

[0018] The lifting unit is for raising and lowering a lifting frame in an up-and-down direction on a main frame and comprises a plurality of lead screws rotatably installed vertically on one side of the main frame, lifting members installed on the side of the lifting frame that are screw-coupled to the lead screws and are raised and lowered according to the forward and reverse rotation of the lead screws, a driven sprocket installed on one side of each lead screw for rotating the lead screws in forward and reverse directions, a second driving motor installed on the main frame, and a driving sprocket installed on the rotation axis of the second driving motor and engaged by a driven sprocket and a chain.

[0019] A lifting assist unit is provided, which is installed on the main frame and the lifting frame to assist in the lifting of the lifting frame.

[0020] The above arm forward / backward unit comprises a rack installed longitudinally on the lower side of an arm that is slidably installed on the lifting frame, a pinion that meshes with the rack installed on a third drive shaft that is rotatably installed on the lifting frame, and a third drive motor installed on the lifting frame to rotate the third drive shaft. Effects of the invention

[0021] The unmanned molten iron induction device of the blast furnace casting machine according to the present invention can produce slag that grows as impurities of the molten iron flowing through the runner by using a slag removal tool installed at the end of the arm and moving three-dimensionally, thereby fundamentally preventing the risk of safety accidents that occur when the process is performed by an operator as in the conventional method. Brief explanation of the drawing

[0022] FIG. 1 is a plan view showing the state in which an unmanned molten iron induction device of a blast furnace casting machine according to the present invention is installed on the runner side of the casting machine; FIG. 2 is a front view of the unmanned molten iron induction device of a blast furnace casting machine shown in FIG. 1; FIG. 3 is a plan view of the unmanned molten iron induction device of a blast furnace casting machine shown in FIG. 1; FIG. 4 is a side view of the unmanned molten iron induction device of a blast furnace casting machine shown in FIG. 1; FIG. 5 is a side view showing an excerpt of the transfer unit shown in FIG. 1; FIG. 6 is a side view showing the driving part of the transfer unit shown in FIG. 5; FIG. 7 is an enlarged view showing the arm forward / reverse unit and the lifting unit according to the present invention; FIG. 8 is a plan view showing the lifting unit shown in FIG. 7. Specific details for implementing the invention

[0023] A casting machine for producing pig iron, that is, pig iron ingots, is designed to produce pig iron ingots by injecting pig iron supplied to a molten iron ladle that has been moved through a Topedo Ladle Car (TLC) into a mold of a strand through a runner. The unmanned molten iron induction device of the blast furnace casting machine according to the present invention is installed adjacent to the runner to remove slag from the runner due to the oxidation of molten iron impurities.

[0024] An example of an unmanned molten iron induction device for a blast furnace casting machine according to the present invention is shown in FIGS. 1 to 8.

[0025] Referring to the drawings, the unmanned molten iron guiding device (10) of the blast furnace casting machine according to the present invention comprises a base frame (12) equipped with guide rails (11) installed in the longitudinal direction of the runner (100) adjacent to the runner (100) between the molten iron ladle of the casting machine and the mold for manufacturing pig iron, and a main frame (15) installed to slide along the guide rails (11) and moved forward and backward by a transfer unit (20).

[0026] And a lifting frame (16) that is raised by a lifting unit (40) is installed on one side of the main frame (15), and the lifting frame (16) is equipped with an arm (110) that is installed to move back and forth toward the runner (100), and a slag removal tool (120) installed at the end of the arm (110) to remove oxidized slag from the runner (100).

[0027] The lifting frame (16) is equipped with an arm forward / backward unit (50) that moves the arm (110) forward and backward so that slag (300) can be removed from the runner (100) using a slag removal tool (120) installed at the end of the arm (110).

[0028] In addition, the lifting frame (16) and the main frame (15) are further provided with a lifting assist unit (30) that enables the lifting frame (16) on which the arm (110) is installed to be lifted smoothly.

[0029] The unmanned molten iron induction device of the blast furnace casting machine according to the present invention, configured as described above, will be explained in more detail by component as follows.

[0030] As shown in FIGS. 2 to 6, a transfer unit (20) for moving the main frame (15) forward and backward along the guide rail (11) of the base frame (12) of the blast furnace casting machine unmanned device (10) according to the present invention is installed with a transfer member (14) that is slidably coupled to the guide rail (11) on the lower surface of the main frame (15).

[0031] And a first drive shaft (21) is rotatably installed at one end of the base frame (12), and a pair of head sprockets (22) (23) are installed on both sides of the first drive shaft (21).

[0032] On the other side of the base frame (12), a second drive shaft (25) is installed parallel to the first drive shaft (21), and a pair of tail sprockets (26) (27) corresponding to the head sprockets (22) (23) are installed on the second drive shaft (25). A chain (28) (29) is installed, with both ends fixed to the main frame (15), and is engaged with the pair of head sprockets (22) (23) and tail sprockets (26) (27), respectively.

[0033] And a first drive motor (200) for driving a first drive shaft (21) on which the head sprockets (22) (23) are installed is installed on the base frame (12). The transmission of power, that is, rotational force, from the first drive motor (200) to the first drive shaft (21) is accomplished by a power transmission means, which may consist of sprockets and chains.

[0034] The above transfer unit is not limited to the embodiments described above, and any structure capable of moving the main frame back and forth along the guide rail is acceptable. For example, it may consist of a lead screw, a pinion rotated by a motor, a rack fixed to the guide rail, and an actuator using hydraulic or pneumatic pressure.

[0035] The above lifting unit (40) is for lifting a lifting frame (16) installed on one side of a main frame (15) in a vertical direction, and a plurality of lead screws (41) are installed at predetermined intervals so as to be rotatable vertically on one side of the main frame (15), and each lead screw (41) is equipped with a lifting member (42) that is screw-coupled to it and is lifted according to the forward and reverse rotation of the lead screw (41) and fixed to the side of the lifting frame.

[0036] In addition, a driven sprocket (43) is installed on one side, that is, the lower side, of each lead screw (41), and this driven sprocket (43) has a structure connected by a chain (45) to a drive sprocket (44) installed on the drive shaft of at least one second drive motor (210) installed on the main frame (15). In order to increase the coupling force of the chain (45) connected to the driven sprocket (43) and the drive sprocket (44), the second drive motor (210) is elastically biased toward the side coupled to the chain (45) by a pressurizing means, such as a cylinder (46) or a shock absorber.

[0037] Meanwhile, the lifting assist unit (30) balances the lifting frame (16) on which the arm (110) is installed using weights to enable smooth lifting. It comprises a weight member (32) that is installed to be able to be lifted along a guide part (31) installed on the side corresponding to the lifting frame (16) which is lifted by a lead screw (41), guide sprockets (33) installed between the main frame (15) and the lifting frame (16), and a chain (34) whose ends are installed on the lifting frame (16) and the weight member (32) when caught on the guide sprockets (33). It is preferable that the guide sprockets (33) be positioned on both sides of the upper side of the main frame (15) so that the weight member (32) can be lifted in conjunction with the lifting of the lifting frame (16).

[0038] For the installation of the arm (110) on the lifting frame (16), a housing (111) for guiding the arm (110) is installed on the lifting frame (16), and guide blocks (112) are installed along the longitudinal direction on both sides of the arm (110) supported by the housing. Additionally, a plurality of cam followers (113) are installed in the housing (111) to support the upper and lower surfaces of the guide blocks (112) on both sides, and a guide bearing (114) is installed on the housing (111) on the side corresponding to the guide block (112) to be in close contact with the side of the guide block (112) to prevent movement during the forward and backward movement of the arm (110). The upper surface of the housing (111) may have an open structure.

[0039] The above arm forward / backward unit (50) is installed on the lifting frame (16) to move the arm (110) supported by the housing (111) forward and backward toward the tung line (100). A rack (51) is installed in the longitudinal direction on the lower surface of the arm (110) supported by the housing (111), and a third drive shaft (52) is installed on the lifting frame (16) in a direction perpendicular to the installation direction of the rack (51). A pinion (53) that meshes with the rack (51) is installed on the third drive shaft (52). A third drive motor (230) is installed on the lifting frame (16) so as to be supported on a rail in a direction parallel to the third drive shaft (52) and capable of moving back and forth, and the drive shaft (230a) of the third drive motor (230) and one side of the third drive shaft (52) are spline-coupled by a coupler.

[0040] And the third drive motor (230) can be moved back and forth by a cylinder (56) installed on the lifting frame (16), so that the drive shaft (230a) of the third drive motor (230) and the third drive shaft (52) can be combined and separated.

[0041] A slag removal tool (120) for removing slag (300) remaining in the tung pot (100) is installed by a bracket (121) at the end of an arm (110), and the slag removal tool (120) is equipped with a shank portion (122) for fixing to the bracket (121) and a scraper portion (123) for removing slag (300).

[0042] Since the molten iron flowing along the runner (100) has a relatively high temperature, the material of the slag removal tool (120) may be made of ceramic, caster ball, etc., which does not melt at the temperature of the molten iron. The slag removal tool (120) may further be provided with a cooling means that can be cooled using air or a cooling medium to prevent it from being dissolved by the molten iron.

[0043] And although not shown in the drawing, the unmanned molten iron guiding device (10) of the blast furnace casting machine may be further equipped with position sensors for position control when removing slag from the runner (100) using a slag removal tool (120) installed at the end of the arm (110), and may be further equipped with a controller for controlling the first, second, and third drive motors and cylinders based on the detection value detected by the sensor.

[0044] The operation of the unmanned molten iron induction device of the blast furnace casting machine according to the present invention, configured as described above, is as follows.

[0045] In order to remove slag (300) caused by the oxidation of impurities of molten iron flowing along the runner (100) using the unmanned molten iron induction device (10) of the blast furnace casting machine according to the present invention, the first drive motor (200) of the transfer unit (20) is driven to rotate the first drive shaft (21), thereby moving the chain attached to the head sprocket (22)(23) and the tail sprocket (26)(27) to move the main frame (15) to a position corresponding to the slag (300) remaining in the runner (100), and at the same time, the arm (110) is moved forward or backward using the arm forward / backward unit (50) so that the slag removal tool (120) is positioned on the upper part of the slag for removal.

[0046] The forward and backward movement of the arm (110) by the arm forward / backward unit (50) is achieved by driving the third drive motor (230) to rotate the third drive shaft (52), thereby moving the rack (51) by the rotation of the pinion (53) installed thereon.

[0047] As described above, with the slag removal tool (120) positioned on the upper side of the slag (300) remaining in the tang (100), the second drive motor (210) of the lifting unit (40) is driven to rotate the lead screws (41), thereby lowering the lifting member (42) installed on the lifting frame (16) which is screw-coupled to it, so that the slag removal tool (120) is lowered toward the slag (300) for removal. In addition, the arm (110) is moved forward and backward using the arm forward / backward unit (50), thereby moving the slag removal tool (120) installed at its end forward and backward to remove the slag.

[0048] During the process of lifting the lifting frame (16), the lifting frame (16) and the weight member (32) are connected by a chain (34) attached to a guide sprocket (33), so the load resulting from the lifting of the lifting frame (16) can be reduced.

[0049] As described above, when removing slag (300) from the runner (100), the transfer unit (20), the lifting unit (40) that lifts the lifting frame (16), and the arm forward / backward unit (50) that moves the arm forward / backward can be driven simultaneously to control the slag removal tool (120) in three axes, so that the slag removal operation from the runner (100) can be performed smoothly.

[0050] As explained above, the unmanned molten iron induction device of the blast furnace casting machine according to the present invention can smoothly control the oxidized slag from the hot water channel through which high-temperature molten iron flows, thereby improving the operating efficiency of the casting machine and further preventing safety accidents.

[0051] The present invention has been described with reference to the embodiments illustrated in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims.

Claims

Claim 1 Guide rails (11) installed on a base frame (12) adjacent to a runner (100) between a molten iron ladle of a casting machine and a mold for manufacturing pig iron; a main frame (15) that moves along the guide rails (11) by a transfer unit (20) installed on the base frame (12); a lifting frame (16) that is raised by a lifting unit (40) installed on the main frame (15); an arm (110) that is slidably installed on the lifting frame (16) and has a slag removal tool (120) at its end for removing slag (300) from the runner (100); and an arm (110) installed on the lifting frame (16) that allows the arm (110) to be moved forward and backward so that the slag (300) can be removed from the runner (100) using the slag removal tool (120) installed at the end of the arm (110). A blast furnace is characterized by having an arm forward / backward unit (50), wherein the arm forward / backward unit (50) comprises a rack (51) installed longitudinally on the lower side of an arm (110) that is slidably installed on the lifting frame (16), a pinion (53) installed on a third drive shaft (52) that is rotatably installed on the lifting frame (16) and meshes with the rack (51), a third drive motor (230) installed on the lifting frame (16) to be supported on a rail in a direction parallel to the third drive shaft (52) and capable of forward / backward movement, and a cylinder (56) installed on the lifting frame (16) to move the third drive motor (230) forward and backward so that the drive shaft (230a) of the third drive motor (230) and one side of the third drive shaft (52) are spline-coupled by a coupler. Automated lure induction device for casting machines. Claim 2 In claim 1, the transfer unit (20) is characterized by comprising a pair of head sprockets (22)(23) installed on a first drive shaft (21) rotatably installed on one end of a base frame (12), a pair of tail sprockets (26)(27) installed on a second drive shaft (25) installed on the other side of the base frame (12), chains (28)(29) that are respectively engaged with the head sprockets (22)(23) and the tail sprockets (26)(27) and have both ends installed on the main frame (15), and a first drive motor (200) installed on the base frame (12) to drive the first drive shaft (21) on which the head sprockets (22)(23) are installed. Claim 3 In claim 1, the lifting unit (40) is for raising and lowering a lifting frame (16) in an up-and-down direction on a main frame (15), and is characterized by comprising a plurality of lead screws (41) rotatably installed vertically on one side of the main frame (15), lifting members (42) installed on the side of the lifting frame (16) and screw-coupled to the lead screws (41) and raised and lowered according to the forward and reverse rotation of the lead screws (41), a driven sprocket (43) installed on one side of each lead screw (41) for rotating the lead screws (41) in forward and reverse directions, a second drive motor (210) installed on the main frame (15), and a drive sprocket (44) installed on the rotation axis of the second drive motor (210) and engaged by the driven sprocket (43) and a chain (45), thereby providing a molten iron guide for a blast furnace casting machine. Unmanned device. Claim 4 In paragraph 3, the device for guiding molten iron in a blast furnace casting machine is characterized by having a lifting assist unit (30) installed on the main frame (15) and the lifting frame (16) to assist in the lifting of the lifting frame (16), wherein the lifting assist unit (30) is equipped with a weight member (32) that moves up and down along a guide part (31) installed on a side corresponding to the lifting frame (16) installed on a lead screw (41), guide sprockets (33) installed on the upper side of the main frame (15), and a chain (34) that is engaged with the guide sprockets (33) and fixed to the lifting frame (16) and the weight member (32) at both ends. Claim 5 delete Claim 6 In claim 1, the support of the arm (110) on the lifting frame (16) is provided by a housing (111) installed on the lifting frame (16) to surround the arm (110), guide blocks (112) installed on both sides of the arm (110), cam followers (113) installed on the housing (111) to support the upper and lower surfaces of the guide blocks (112), and guide bearings (114) installed on both sides of the housing (111) to support the sides of the guide blocks (112), thereby forming an unmanned device for guiding molten iron in a blast furnace casting machine. Claim 7 The blast furnace casting machine's unmanned molten iron induction device according to claim 1, wherein the slag removal tool (120) is supported by a bracket (121) installed at the end of an arm (110), and comprises a shank portion (122) fixed to the bracket (121) and a scraper portion (123) installed on the lower side of the shank portion (122), and is made of caster ball or ceramic.

Images