KR200317085Y1 - An apparatus for exchanging the lance in a melting iron preparation process - Google Patents

Abstract

The present invention relates to a device for replacing a lance in a facility for pretreating molten iron.

The present invention is equipped with a lance 120 by injecting powder such as a desorbent and a dephosphorization agent in the molten iron with an inert gas (nitrogen) in a facility for pretreatment of the molten iron, the storage vessel to be transported and stored (P) An elevating part (10) having a first motor (14) for moving the cart (12) up and down along the vertical rail (11) vertically installed near the upper part of the cart (11); A swing body 25 having a second motor 22 on a fixed bracket 21 fixed to the front of the cart 12 and integrally connecting a rotational drive shaft 23 of the second motor 22 to one end. A swing portion 20 for pivoting the swing body 25; A first cylinder 32 is provided in the inner space S of the quadrangular box 31 integrally mounted at the other end of the swing body 25, and moves up and down together with the rod end of the first cylinder 32. A connection part 30 having a coupling 36 mounted on the block 33 at a lower end of the blowing line 120 to connect the lance 120 and the blowing line 130; The upper and lower clamps 41a and 41b having seating grooves 41c on the front surface of the rectangular box 31, and upper and lower clamps 42a toward the lance 120 spanning the seating grooves 41c. A clamping part 40 for clamping the lance 120 by having a second cylinder 43 for turning the blade 42b on one side of the rectangular box 31; A guider on which the first and second seating grooves 51a and 51b to which the lance 120 is fitted are formed at the front end of the movable base 51, and the movable wheel 51c of the movable base 51 is disposed. 52a) and 52b, and having a third cylinder 53 connected to the rod end thereof so as to move the movable base 51 forward and backward, the lance moving part 50 for taking out and attaching the lance 120. It is configured to include.

According to the present invention, a lance that injects delineation and desorbent along with an inert gas into the molten iron can be easily mounted and detached from a cradle and automatically replaced with a new lance to reduce the work load of the worker and reduce the operating time. This can improve the operating efficiency.

Description

LAN APPARATUS FOR EXCHANGING THE LANCE IN A MELTING IRON PREPARATION PROCESS}

The present invention relates to a device for replacing a lance in a facility for preliminary treatment of molten iron, and more specifically, a lance for injecting delineating and desorbent with inert gas into a molten iron in a cradle irrelevant to operation. The present invention relates to a lance replacement device for a molten iron preliminary treatment facility that can improve the efficiency of operation by reducing the work load of the worker by automatically replacing the furnace and reducing the operating time and increasing the airtightness between the pipe hose and the lance.

In general, the molten iron preliminary treatment facilities of steel mills are equipped with a lance vertically lowered into a molten iron stored in a molten iron or ladle transported by Torpedo Car, through which the powder such as a degreasing agent and a dephosphorizer By supplying, to remove sulfur and phosphorus as impurities contained in the molten iron, such powder is blown into the molten iron by an inert gas such as nitrogen gas.

As shown in FIGS. 1 and 2, the preliminary treatment of the molten iron stored in the topedo car 110 is carried out on the trolley 107 when the topedo car 110 enters a preset pretreatment position. The lower lance 120 is lowered along the vertical rails 106 so that the lower end is deposited on the molten iron of the torpedo car 110, and in this state, the powder of the storage tank 140 is supplied with nitrogen gas. Nitrogen and powder are blown into the molten iron at a predetermined pressure through the lance 120 detachably assembled at the upper end of the blowing line 130. In addition, the blowing line 130 is provided with automatic valves (140a, 140b) in each branch line to control the supply flow of powder and the supply flow of nitrogen gas.

Since the lower end is directly immersed in the molten iron at 1500 ° C, the lance 120 must be replaced with a new lance 120 periodically 7 to 8 times a day, and the lance 120 is replaced with a new one. The conventional operation of replacing the first quick coupler (130a) provided at the lower end of the blowing line 130 from the upper end of the lance 120, and the lance from the bogie 107 assembled to the vertical rail 106 After disassembling the 120, the lance 120 was transferred to a separate storage location using a hoist. And, the new lance was mounted on the front of the cart 107 in the reverse order of the disassembly work, and then the quick coupler 130a of the blown line 130 was connected to finish the replacement work.

However, since the conventional lance replacement work is performed by hand, the time required for the work is excessively over 20 minutes each time, and the operation is not possible during the replacement work, and the hoist is operated to operate the quick coupler 130a. At least two or more workers are required to disconnect or connect, which lowers the productivity of work, and there is always a risk of explosion accident when the operation is immature.

Therefore, the present invention has been proposed to solve the conventional problems as described above, the object of which is to easily and quickly perform the work of replacing the lance for supplying the powder to the molten iron, to improve the work productivity, blowing In order to improve the airtightness between the line and the lance to provide a lance replacement device of the molten iron preliminary treatment equipment to increase the operation efficiency.

1 is a schematic view showing a general molten iron preliminary treatment equipment,

Figure 2 is a schematic diagram showing a connection structure between the lance and the blowing line in the general molten iron preliminary treatment equipment,

Figure 3 is an overall configuration showing a lance replacement device of the molten iron preliminary treatment equipment according to the present invention,

4 is a plan view showing a lance replacement device of the molten iron preliminary treatment equipment according to the present invention,

5 (a) (b) is a front view and a side view showing a swing portion employed in the lance replacement apparatus of the molten iron preliminary treatment equipment according to the present invention,

Figure 6 (a) (b) is a front view and a side view showing the connection portion, the clamping portion employed in the lance replacement device of the molten iron preliminary treatment equipment according to the present invention,

Figure 7 (a) (b) (c) is a front view, a plan view and a side view showing a lance replacement device of the molten iron preliminary treatment equipment according to the present invention.

Explanation of symbols on the main parts of the drawings

11 ...... vertical rail 12 ...... bogie

21 ...... Bracket 22 ...... 2nd Motor

31 ...... Rectangular box 32 ...... 1st cylinder

33 ...... Movement block 34 ......

35a, 35b ... corrugated pipe 36 ...... coupling

41a, 41b ... upper and lower lance brackets 42a, 42b ... upper and lower clamps

43 ... 2nd cylinder 45 ... vertical axis

51 ...... Moving base 51a, 51b ... 1st and 2nd seating groove

52a, 52b ... guider 53 ... 3rd cylinder

120 .... Lance 120a, 120b ... upper and lower jaw jaw

As a technical configuration for achieving the above object, the present invention,

In the equipment which blows powder such as desorbing agent and dephosphorizing agent into the molten iron together with an inert gas, it is equipped with a lance to pretreat the molten iron,

An elevating unit for elevating and lowering the trolley with a first motor configured to slide the trolley up and down along a vertical rail vertically installed near the upper portion of the storage vessel in which the molten iron is stored;

A swing unit provided with a second motor on a fixed bracket fixed to the front of the cart, and having a swing body integrally connected to one end of a rotation driving shaft of the second motor to swing the swing body;

A first cylinder is provided in an inner space of a rectangular box integrally mounted to the other end of the swing body, and a coupling mounted to the movable block 33 which is vertically operated together with the rod end of the first cylinder is connected to the lower end of the intake line. Equipped with a connecting portion for connecting the lance and the blowing line;

The upper and lower lance bracket having a seating groove on the front of the rectangular box, the second cylinder for turning the upper and lower clamps to the lance side across the seating groove on one side of the rectangular box to clamp the lance A clamping unit;

The first and second seating grooves into which the lances are fitted are formed at the front end of the movable base, the guider is installed to fix the movement wheel of the movable base, and the rod end is connected to the front and rear movements of the movable base. And a lance moving unit for removing and attaching the lance with a third cylinder.

Hereinafter, the present invention will be described in more detail.

Figure 3 is an overall configuration showing the lance replacement apparatus of the molten iron preliminary treatment equipment according to the present invention, Figure 4 is a plan view showing a lance replacement apparatus of the molten iron preliminary treatment equipment according to the present invention, Figure 5 (a) ( b) is a front view and a side view showing a swing portion employed in the lance replacement apparatus of the molten iron preliminary treatment equipment according to the present invention, Figure 6 (a) (b) is a lance replacement device of the molten iron preliminary treatment equipment according to the present invention Figure 7 (a) (b) (c) is a front view, a plan view and a side view showing a lance replacement device of the molten iron preliminary treatment equipment according to the present invention.

As shown in Figs. 3 to 7, the device 1 of the present invention is easy to supply a lance for supplying a powder having a deactivating agent and a dephosphorizing agent together with an inert gas to a molten iron stored in a storage container such as topedoca and ladle. As quickly replaceable, the device 1 is composed of the elevating portion 10, the swing portion 20, the connecting portion 30, the clamping portion 40 and the lance moving portion 50.

That is, the elevating unit 10 is installed vertically vertical rails 11 of a predetermined length on the upper portion of the storage container (P), and the cart 12 having movement wheels at both ends of the vertical rails (11). The slide 12 is assembled so as to slide in the vertical direction, and the trolley 12 is wound around the wire drum 14a of the first 14 which generates the traction force when the power is applied through the wire 13.

Here, the vertical rail 11 is vertically arranged on the vertical body frame (10a), the end of the wire 13 is equipped with a hook (13a) to be hooked to the hook of the bogie 12, the body frame A plurality of pulleys 15 are provided at 10a to smoothly transfer the traction force of the first motor 14.

In addition, the swing unit 20 is fixed to the fixed bracket 21 as a plurality of fastening members on the front of the cart 12, the second motor for generating a rotational driving force when the power applied to the fixed bracket 21 (22) is mounted, upper and lower bearings having a bearing member to rotatably support a rotation drive shaft (23) extending vertically to the second motor (22) directly below the fixing bracket (21). Blocks 24a and 24b are provided.

In addition, the upper and lower bearing blocks 24a and 24b are detachably assembled on the front surface of the trolley 12 as a plurality of fastening members, and are rotatably mounted to the upper and lower bearing blocks 24a and 24b. The supported rotation drive shaft 23 is connected in one piece to one end of the swing body 25 via a fixing key. Accordingly, when the rotation driving shaft 23 is rotated by the rotation driving force of the second motor 22, the swing body 25 is pivoted about the rotation driving shaft 23.

In addition, the connection part 30 which connects the lance 120 with the lower end deposited on the molten iron of the storage line P and the blowing line 130 to which the powder is supplied together with nitrogen gas is opposite to the rotation drive shaft 23. On the other end of the swing body 25 corresponding to one piece is mounted integrally as a plurality of fastening members of a rectangular box 31 having an internal space (S) of a predetermined size.

The square box 31 is assembled by assembling a plurality of plate plate materials, respectively, front and rear, right and left, so as to form the internal space S of the rectangular parallelepiped, and the rod end is connected to the upper end of the inner surface via a cylinder bracket 32a. The first cylinder 32 is disposed vertically in the internal space S so as to face the lower portion, and the movable block 33 is integrally connected to the rod end of the first cylinder 32 via a connecting bracket 33a. Leads to. Accordingly, in the up and down reciprocating operation of the first cylinder 32, the movable block 33 is also moved up and down.

Here, the movable block 33 slides up and down on guide rods 34 having a predetermined length, respectively supported by upper and lower ends of upper and lower support brackets 34a and 34b mounted on the front of the rectangular box 31. Assembled to be movable, the upper and lower portions of the movable block 33 is provided with a corrugated pipe (35a, 35b) to absorb the shock, respectively, the movable block 33 is made to smoothly move up and down It is assembled with the guide rod 34 via a bearing member so as to lose.

In addition, the front surface of the rectangular box 31 corresponding to the moving block 33 is smoothly made up and down of the connecting bracket 33a connecting the rod end of the first cylinder 32 and the moving block 33 to each other. The opening 31a is formed to have an opening, and openings 31a are formed in the right and left sides of the rectangular box 31 so as to easily observe the internal space S.

In addition, the coupling block 36a having the coupling 36 provided at the lower end of the blowing line 130 into which the powder is introduced together with the nitrogen gas is mounted on the front surface of the moving block 33 as a plurality of fastening members. do. Accordingly, the coupling 36 is to be assembled or separated close to the top of the lance 120 while being moved up and down with the up and down operation of the first cylinder (32).

Meanwhile, the clamping part 40 for clamping and fixing the lance 120 to which the coupling 36 is tightly assembled at the upper end includes upper and lower lance brackets 41a including a '함' shaped seating groove 41c. ) 41b is integrally welded to the front end of the square box 31 at the front end, and the upper and lower lance brackets 41a and 41b are protruded on the outer surface of the body to form a ring-shaped upper part. The upper and lower clamps 42a and 42b are simultaneously engaged with the locking jaw 120a by turning to the side of the lance 120 which is raised on the seating groove 41c of the upper and lower lance brackets 41a and 41b. One side outer surface of the rectangular box 31 is provided with a second cylinder 43 for pivoting the upper and lower clamps 42a and 42b.

Here, the upper and lower clamps 42a and 42b are rotatable at both ends of the upper and lower ends of the upper and lower fixing blocks 45a and 45b that are fixed to the front of the rectangular box 31 through a bearing member. It is integrally mounted to the assembled vertical shaft 45, one end of the upper clamp (42a) is connected via the rod end of the second cylinder 43 and the pin member (43a). Accordingly, during the forward or backward operation of the second cylinder 43, the upper and lower clamps 42a and 42b are pivoted toward the lance 120 to be mounted thereon.

In addition, the lance moving unit for removing the lance 120 from the upper and lower lance brackets (41a) (41b), and moves the lance 120 to attach a new lance to the upper and lower lance brackets (41a) (41b). 50 is a mobile base formed in the front end of the first and second seating grooves 51a and 51b of the '걸리' shape to be caught by the lower locking jaw (120b) protruding in an annular shape on the outer surface of the lance body And a plurality of movable wheels 51c mounted on the left and right sides of the movable base 51 so as to roll-rotate inside the left and right pairs of guiders 52a and 52b mounted on the fixed base 59. Is placed. Accordingly, the movable base 51 can move forward and backward along the guiders 52a and 52b.

A cylinder bracket is mounted across the left and right pairs of guiders 52a and 52b, and the rear end of the body of the third cylinder 53 is integrally connected to the center of the length of the holder 54. And a rod end of the third cylinder 53 is connected to an upper surface of the movable base 51.

The operation and effects of the present invention having the configuration as described above will be described.

Periodically replacing the damaged lance 120 with a new one during the preliminary treatment of the molten iron using the apparatus (1) of the present invention, first, the lance 120 in which the lower end is deposited on the molten iron of the storage container (P) When the first motor 14 is operated to raise (), the drum (when the wire 13 is wound) is driven to rotate in the winding direction. The hook (13a) assembled at the end of the wound wire (13) is a vertical rail ( Since the trolley 12 is connected to the hook of the trolley 12 assembled to the vehicle 11, the trolley 12 is raised to the upper end of the vertical rail 11 and then stopped when the first motor 14 is stopped.

At this time, the swing body 25 and the lance 120 clamped to the swing body 25 integrally assembled on the front surface of the cart 12 together with the vertical rise of the bogie 12 are replaced without the interference with the storage container P in which the molten iron is stored. It is raised to a certain height so that work can be performed smoothly.

In this state, when the power is applied to the second motor 22 mounted on the front of the trolley 12 to drive the rotary drive shaft 23 extending downward in the forward direction, the swing body 25 is the rotation After turning to the lance moving position less than 90 degrees toward the lance moving part 50 which is a replacement operation position centering on the drive shaft 23, it stops by the drive interruption of the said 2nd motor 22. FIG.

In addition, the first and second seating grooves 51a formed at the front end of the moving base 51 of the square box 31 and the lance 120 clamped thereto are mounted on the front of the swing body 25. The second seating groove 51b, in which the lance 120 is not hung, has a one-to-one correspondence with each other.

Continuously, the first cylinder 32 is installed in the inner space (S) of the rectangular box 31 to separate the upper end of the lance 120 and the blowing line 130, which is stopped at the lance taking-out position after turning. When the upward operation, since the moving block 33 connected through the rod end and the connecting bracket (33a) is raised along the guide rod 34, the coupling 36 integrally connected to the moving block (33) This rising operation separates the lance 120 and the blowing line 130 from each other.

Then, when the second cylinder 43 assembled on one side outer surface of the rectangular box 31 is subjected to the backward return operation, the upper and lower clamps 42a and 42b connected through the rod end and the pin member 43a as a medium. Unclamps the lance 120 while turning counterclockwise in the drawing about the vertical axis 45. Accordingly, the lance 120 to be damaged and replaced is a seating groove of the upper lance bracket 41a of the upper and lower lance brackets 41a and 41b of the annular upper locking jaw 120a protruding from the body outer surface. It is the state simply raised over 41a.

In this state, when the third cylinder 53 in which the rod end is connected to the movable base 51 is operated forward, the movable base 51 is assembled so as to be movable forward and backward between the left and right pairs of guiders 52a and 52b. ) Is advanced to the front and the lance 120 to be unclamped in the lance taking out position is inserted into the second seating groove (51b) of the first and second seating grooves (51a, 51b) of the movable base (51). do.

At the same time, when the first motor 14 is slightly rotated in the opposite direction as opposed to the above, and then stopped, the replacement lance 120 along with the bogie 12 connected to the unwinding wire 13 is slightly lowered in its own weight direction. While the lower locking jaw (120b) protruding on the outer surface of the body spans the second seating groove (51b), while the seating groove (41c) and the upper locking jaw (120a) of the upper lance bracket (41a) The latch of the liver is released so that the lance 120 is lifted up over the second seating groove 51b of the movable base 51.

Therefore, when the third cylinder 53 is operated backward, the reverse movement base 51 is returned to the rear, and the upper and lower lance brackets 41a (upper and lower lances 120) are extended to the second seating grooves 51b. Completely spaced apart from 41b), the separated lance 120 is transferred to another location using a hoist.

On the other hand, after replacing the damaged lance 120 to the outside and attaching a new lance 120 to the upper and lower brackets (41a, 41b) is performed in the reverse of the take-out operation, the damaged lance 120 In the state where all the work is removed, the second motor 22 is rotated once again in the forward direction to rotate the rotary drive shaft 23 in the counterclockwise direction so that the swing body 25 is 90 to the lance moving part 50 side. The position is stopped by turning off the second motor 22 after turning to the lance mounting position exceeding °.

Then, when the third cylinder 53 of the lance moving unit 50 is moved forward to move the moving base 051 forward, the moving base 51 on which the lower locking jaw 120b of the new lance 120 extends. Since the first seating groove 51a and the upper and lower lance brackets 41a and 41b correspond to each other one-to-one, the lance 120 has a seating recess of the upper and lower lance brackets 41a and 41b. It is fitted to 41c.

In this state, when the wire 13 is wound by the winding operation of the first motor 14 and the cart 12 is slightly raised, the lower locking jaw 120b of the lance 120 is moved by the movable base 51. While the latch is released from the first seating groove 51a of the upper part, the upper latching jaw 120a of the lance 120 is mounted on the seating groove 41c of the upper lance bracket 41a. .

Therefore, the new lance 120 is extended over the upper lance bracket (41a) and at the same time as the third cylinder 53 is reversed to move back the moving base 51, the second cylinder (53) When the upper and lower clamps 42a and 42b are pivoted to the lance side by moving forward, the upper and lower clamps 42a and 42b and the upper and lower lance brackets are pivoted. It is clamped to 41a) 41b and fixed in position without shaking.

In such a state, when the rod end of the first cylinder 31 which is operated up and down during the lance take-out operation in the inner space S of the rectangular box 31 is lowered, the moving block 33 is lowered directly below the blown, A coupling 36 mounted at the lower end of the line 130 and the upper end of the clamped lance 120 are connected to each other.

When the clamping of the lance 120 and the connection with the blown line 130 are finished, the second lance 22 is rotated in the opposite direction to the contrary to the above to store the replaced lance 120. It is arrange | positioned on the upper part of P).

In addition, when the first motor 14 is re-driven to rotate the drum in which the wire 13 is wound and rotates in the release direction to release the wire 13, the trolley 12 together with the lance 120 moves in the own weight direction. Since the lower end of the replaced new lance 120 is deposited on the molten iron of the storage container (P) it is possible to re-inject the nitrogen gas into the molten iron together with the powder.

According to the present invention as described above, the replacement work for removing the damaged lance to the outside and attaching a new lance can be safely performed by a single worker in a short time to improve the work productivity compared to the conventional, and the burden on the worker's work On the other hand, the airtightness between the blowing line and the lance supplied with nitrogen gas together with the powder can be improved as compared with the conventional one, thereby increasing the operation efficiency.

Although the present invention has been shown and described with reference to specific embodiments, it is conventional in the art that the present invention may be variously modified and changed without departing from the spirit or the scope of the present invention provided by the following claims. I would like to know that those who have knowledge of Easily know.

Claims (4)

In the equipment to blow the powder, such as the desorbing agent and the dephosphorization agent in the molten iron with an inert gas, equipped with a lance 120, to pretreat the molten iron, Elevating and lowering the bogie 11 with a first motor 14 for sliding the bogie 12 up and down along the vertical rail 11 installed vertically near the upper portion of the storage vessel (P) where the molten iron is stored. Steel part 10; A swing body 25 having a second motor 22 on a fixed bracket 21 fixed to the front of the cart 12 and integrally connecting a rotational drive shaft 23 of the second motor 22 to one end. A swing portion 20 for pivoting the swing body 25; A first cylinder 32 is provided in the inner space S of the quadrangular box 31 integrally mounted at the other end of the swing body 25, and moves up and down together with the rod end of the first cylinder 32. A connection part 30 having a coupling 36 mounted on the block 33 at a lower end of the blowing line 120 to connect the lance 120 and the blowing line 130; The upper and lower clamps 41a and 41b having seating grooves 41c on the front surface of the rectangular box 31, and upper and lower clamps 42a toward the lance 120 spanning the seating grooves 41c. A clamping part 40 for clamping the lance 120 by having a second cylinder 43 for turning the blade 42b on one side of the rectangular box 31; A guider on which the first and second seating grooves 51a and 51b to which the lance 120 is fitted are formed at the front end of the movable base 51, and the movable wheel 51c of the movable base 51 is disposed. 52a) and 52b, and having a third cylinder 53 connected to the rod end thereof so as to move the movable base 51 forward and backward, the lance moving part 50 for taking out and attaching the lance 120. Lance replacement apparatus of the molten iron preliminary treatment equipment comprising a. The method of claim 1, The movable block 33 is movable up and down on a guide rod 34 of a predetermined length, which is supported on the upper and lower ends of the upper and lower support brackets 34a and 34b mounted on the front of the rectangular box 31, respectively. The lance replacement apparatus of the molten iron preliminary treatment equipment, characterized in that the corrugated pipes (35a, 35b) are provided on the upper and lower portions of the moving block 33 to absorb the shock. The method of claim 1, The upper and lower clamps 42a and 42b are assembled to the upper and lower fixing blocks 45a and 45b rotatably installed at the front of the rectangular box 31 so that both upper and lower ends thereof are rotatable through a bearing member. And one end of the upper clamp 42a is connected to the rod end of the second cylinder 43 and the pin member 43a. Lance replacement device. The method of claim 1, On the outer surface of the body of the lance 120, the annular upper locking jaw (120a) that is caught in the seating groove (41c) of the upper lance bracket (41a) and the first and second seating groove (51a) of the movable base 51 Lance replacement device of the molten iron preliminary treatment equipment, characterized in that each protrudes to form a ring-shaped lower locking jaw (120b) to the (51b).