Emergency conduit device applied to LF furnace wire feeder

Abstract

The utility model provides an emergency conduit device applied to an LF furnace wire feeder, which comprises an emergency conduit, a hoisting component and a limiting rod, the emergency conduit comprises a sleeve and an inserting part, and the inserting part is fixed on the peripheral surface of the sleeve; the lifting assembly is connected with the sleeve, the limiting rod is detachably connected to the inserting part in an inserted mode, the length of the limiting rod is larger than the hole diameter of a cover hole of a furnace cover of the LF furnace, and the position of the emergency guide pipe can be adjusted through cooperation of the lifting assembly and the limiting rod. The casing pipe can be inserted into a cover hole of a furnace cover of the LF furnace, and the top end of the casing pipe can be sleeved outside a fixed inner guide pipe of a wire feeder of the LF furnace to replace a movable outer guide pipe, so that wire feeding can still be performed when movable outer guide adhesive steel of the wire feeder breaks down and wire feeding cannot be performed, and the loss of casting machine breakage caused by molten steel viscosity is reduced.

Description

Technical Field

[0001] The utility model relates to the field of steelmaking process equipment in the steel industry, and in particular to an emergency conduit device applied to a wire feeding machine of an LF furnace. Background Art

[0002] During the steelmaking process in the LF refining furnace, wire feeding is required after the molten steel's refined composition meets the required standards. This involves adding calcium-silicon wire to the molten steel in the ladle via the feeder's fixed inner conduit and a movable outer conduit, which is slidable outside the fixed inner conduit. This process requires an operator to operate the wire feeder at the furnace door, inserting the movable outer conduit into the furnace cover approximately 800mm from the molten steel. During this process, the operator monitors the calcium-silicon wire in the outer conduit. The addition of calcium-silicon wire facilitates the adjustment and precise control of the composition, alters the morphology of inclusions in the molten steel, improves the casting process, and enhances molten steel quality.

[0003] However, the aforementioned wire feeder has the following drawbacks in actual use: During the wire feeding process of the prior art, the movable outer conduit must be inserted into the furnace cover at a distance of approximately 800 mm from the molten steel to ensure effective wire feeding. However, because the end of the movable outer conduit of the wire feeder inserted into the furnace cover is relatively close to the molten steel, the air-permeable bricks at the bottom of the ladle introduce argon gas into the molten steel, causing the molten steel to churn. This churning of the molten steel causes the movable outer conduit of the wire feeder to easily stick to the steel, resulting in the movable outer conduit being unable to move to the desired position relative to the fixed inner conduit within it during the next wire feeding. The calcium-silicon wire becomes stuck and accumulates in the movable outer conduit, leading to ineffective wire feeding and viscous molten steel, causing the casting machine to shut down. In the prior art, if an operator inspects the wire feeding of the wire feeder and finds a wire stuck, they typically proceed directly to feed the wire without using the movable outer conduit. However, this results in an extremely low absorption rate of the calcium-silicon wire by the molten steel, causing the molten steel to become viscous and causing the casting machine to shut down for extended periods, resulting in significant losses. Summary of the Invention

[0004] The utility model aims to solve the above-mentioned technical problems and provides an emergency conduit device applied to the LF furnace wire feeder, which can ensure the effective feeding of molten steel when the movable outer conduit of the wire feeder fails to feed wire due to steel sticking.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is:

[0006] An emergency duct device for an LF furnace wire feeder comprises an emergency duct, a hoisting assembly and a limit rod, wherein the emergency duct comprises a sleeve and a plug-in portion, and the plug-in portion is fixed to the outer circumferential surface of the sleeve; the hoisting assembly is connected to the sleeve, and the limit rod is detachably plugged into the plug-in portion, and the length of the limit rod is greater than the aperture of the cover hole of the furnace cover of the LF furnace. The position of the emergency duct can be adjusted by the cooperation of the hoisting assembly and the limit rod.

[0007] Furthermore, the lifting assembly includes a bracket, a fixed pulley and a lifting rope, the fixed pulley is rotatably mounted on the bracket, the fixed pulley is located above the sleeve, the lifting rope is wound around the fixed pulley, one end of the lifting rope is connected to the sleeve, and the other end of the lifting rope is the operating end.

[0008] Furthermore, a working platform is provided on one side of the LF furnace, and the operating end of the lifting rope and the limiting rod can extend to the working platform.

[0009] Furthermore, the plug-in portion is provided with a socket, and one end of the limiting rod is detachably inserted into the socket.

[0010] Furthermore, the limiting rod includes a gripping portion and a hook portion fixedly connected to one end of the gripping portion, and the hook portion is detachably inserted into the socket.

[0011] Furthermore, the hook portion includes a first straight rod segment, a second straight rod segment and an arc segment connecting the first straight rod segment and the second straight rod segment, the end of the first straight rod segment away from the arc segment is connected to the holding portion, the second straight rod segment is detachably inserted into the socket, the first straight rod segment, the second straight rod segment and the arc segment are arranged to form a limiting space with an opening, and when the limiting rod and the socket are in a separated state, the sleeve can enter the limiting space through the opening.

[0012] Furthermore, the first straight rod segment is arranged obliquely relative to the gripping portion, and the second straight rod segment is perpendicular to the gripping portion, so that the width of the limiting space gradually decreases in a direction away from the opening.

[0013] Furthermore, a hanging ring is fixed on the outer peripheral surface of the sleeve, the hanging ring is located above the plug-in portion, and one end of the hanging rope is connected to the hanging ring.

[0014] Furthermore, the sling rope and the hanging ring are detachably connected together via a shackle.

[0015] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0016] 1. The emergency guide tube device applied to the LF furnace wire feeder can adjust the position of the emergency guide tube through the lifting assembly and the limit rod, so that the sleeve can be inserted into the cover hole of the furnace cover of the LF furnace, and the top end of the sleeve can be mounted on the outside of the fixed inner guide tube of the LF furnace wire feeder to replace the movable outer guide tube, so that when the movable outer guide steel of the wire feeder fails and cannot feed the wire, the wire can still be fed, thereby reducing the loss of the casting machine caused by the viscosity of the molten steel.

[0017] 2. When using the emergency duct device applied to the LF furnace wire feeder to deal with an accident involving the movable external duct of the wire feeder, the emergency duct is installed by using a lifting assembly in conjunction with a limiting rod, and the installation time is about 1.5 minutes. However, the installation time is about 4 minutes when the emergency duct is installed on a shelf while wearing a safety belt. Therefore, the utility model can save about 63% of the time by using a lifting assembly in conjunction with a limiting rod, thereby greatly shortening the installation time and improving the work efficiency when installing the emergency duct.

[0018] 3. When installing the emergency duct of the present invention, personnel only need to operate the hoisting components and the limit rod on the working platform away from the LF furnace, thereby ensuring the safety of the operating personnel to a great extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of an emergency conduit device applied to a LF furnace wire feeder according to a preferred embodiment of the present invention;

[0020] Figure 2 This is a structural diagram of a preferred embodiment of the present invention after the limiting rod is inserted into the inserting portion;

[0021] Figure 3 This is a structural diagram of the connection between the hanging rope and the emergency catheter in a preferred embodiment of the present invention;

[0022] In the accompanying drawings, 10, emergency conduit; 11, sleeve; 13, plug-in part; 131, socket; 14, hanging ring; 20, lifting assembly; 21, bracket; 22, fixed pulley; 23, lifting rope; 30, limiting rod; 31, gripping part; 32, hook; 321, first straight rod section; 322, second straight rod section; 323, arc section; 324, opening; 325, limiting space; 40, shackle; 41, shackle body; 43, horizontal axis; 50, working platform; 51, guardrail; 200, furnace cover; 210, cover hole; 300, ladle; 400, fixed inner conduit. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] See Figure 1 A preferred embodiment of the present invention provides an emergency duct device for an LF furnace wire feeder, comprising an emergency duct 10, a hoisting assembly 20 and a limiting rod 30. The hoisting assembly 20 is connected to the emergency duct 10, and the limiting rod 30 is detachably connected to the emergency duct 10; the position of the emergency duct 10 can be adjusted by the hoisting assembly 20 and the limiting rod 30.

[0027] Please also see Figure 2 The emergency catheter 10 includes a sleeve 11 and a plug-in portion 13. The plug-in portion 13 is fixed to the outer circumference of the sleeve 11 and has a socket 131. In this embodiment, the sleeve 11 is a tubular structure with both ends open; the plug-in portion 13 is generally a tubular structure. The plug-in portion 13 is perpendicular to the sleeve 11 and is welded and fixed to the outer circumference of the sleeve 11. The plug-in portion 13 is located near the top of the sleeve 11. A hanging ring 14 is also fixed to the outer circumference of the sleeve 11, and the hanging ring 14 is located above the plug-in portion 13. In this embodiment, the hanging ring 14 is welded and fixed to the outer circumference of the sleeve 11.

[0028] Please also see Figure 3, the hoisting assembly 20 is connected to the sleeve 11, and the hoisting assembly 20 is used to lift the sleeve 11. In this embodiment, the hoisting assembly 20 includes a bracket 21, a fixed pulley 22 and a lifting rope 23, wherein the bracket 21 can be fixed on the mounting frame of the wire feeder (not shown). It can be understood that in other embodiments, the bracket 21 can also be supported on the ground or connected and fixed to other external support frames. The fixed pulley 22 is rotatably mounted on the bracket 21, and the fixed pulley 22 is located above the sleeve 11. The lifting rope 23 is wound around the fixed pulley 22, and one end of the lifting rope 23 is connected to the sleeve 11. In this embodiment, one end of the lifting rope 23 is connected to the hanging ring 14. Specifically, one end of the lifting rope 23 and the hanging ring 14 are detachably connected together through a shackle 40. The structure of the shackle 40 is conventional, comprising a shackle body 41 and a transverse shaft 43. To connect, one end of the sling 23 is wrapped around the shackle body 41 and secured by tying a knot or other means. The ends of the shackle body 41 are then placed outside opposite ends of the hook 14. The transverse shaft 43 is then inserted through the ends of the shackle body 41 and the hook 14. The other end of the sling 23 serves as an operating end, allowing an operator to pull and release the sling 23, thereby raising or lowering the emergency catheter 10. In this embodiment, the sling 23 is a steel wire rope.

[0029] The length of the limiting rod 30 is greater than the diameter of the cover hole 210 of the LF furnace cover 200. The limiting rod 30 is removably inserted into the insertion portion 13. In this embodiment, one end of the limiting rod 30 is removably inserted into the socket 131. Specifically, the limiting rod 30 includes a gripping portion 31 and a hook portion 32 fixedly connected to one end of the gripping portion 31. The gripping portion 31 is a straight rod structure; the hook portion 32 is removably inserted into the socket 131. The hook portion 32 includes a first straight rod segment 321, a second straight rod segment 322, and an arcuate segment 323 connecting the first and second straight rod segments 321 and 322. The end of the first straight rod segment 321 away from the arcuate segment 323 is connected to one end of the gripping portion 31. The second straight rod segment 322 is removably inserted into the socket 131. A restricted space 325 with an opening 324 is formed between the first straight section 321, the second straight section 322, and the curved section 323. In this embodiment, the first straight section 321 is tilted relative to the grip portion 31, while the second straight section 322 is perpendicular to the grip portion 31. This allows the width of the restricted space 325 (i.e., the distance between the first straight section 321 and the second straight section 322) to gradually decrease as it moves away from the opening 324, resulting in a maximum width at the opening 324. When the restricting rod 30 is separated from the socket 131, the sleeve 11 can enter the restricted space 325 through the opening 324, facilitating the sleeve 11's movement via the restricting rod 30 to adjust the position of the emergency catheter 10. The restricted space 325 is widest at the opening 324, making it easier for the sleeve 11 to enter the restricted space 325.

[0030] In this embodiment, a working platform 50 is further provided on one side of the LF furnace, and the operating end of the sling 23 and the limit rod 30 can extend to the working platform 50. During work, the operator can operate the hoisting assembly 20 and the limit rod 30 on the working platform 50. In addition, in order to prevent the operator from accidentally falling off the working platform 50, a guardrail 51 can also be provided around the working platform 50. When the hoisting assembly 20 is not in use, the operating end of its sling 23 is located above or near the working platform 50 to facilitate the operator to hold and operate, or the operating end of its sling 23 can be detachably connected to the guardrail 51 to facilitate the operator's next operation. Specifically, the sling 23 can be tied to the guardrail 51 by a tying method, or the sling 23 can be detachably connected to the guardrail 51 by a shackle, etc.

[0031] When the movable outer conduit of the wire feeder fails to feed wire due to steel sticking, an emergency conduit 10 needs to be installed on site. During operation, the position of the emergency conduit 10 is adjusted by the hoisting assembly 20 and the limit rod 30, so that the sleeve 11 can be inserted into the cover hole 210 of the furnace cover 200 of the LF furnace, and the top end of the sleeve 11 can be sleeved on the outside of the fixed inner conduit 400 of the LF furnace wire feeder to complete the sleeve action.

[0032] Specifically, Operator A and Operator B first position themselves on the work platform 50. Initially, the lifting rope 23 is connected to the emergency duct 10, while the limiting rod 30 is separated from the emergency duct 10. The emergency duct 10 is positioned on the work platform 50. To install the emergency duct 10, Operator A pulls up the lifting rope 23 with the operator's end, while Operator B uses the limiting rod 30 to move the emergency duct 10 toward the furnace cover 200 and into the cover hole 210 of the furnace cover 200. Specifically, Operator B hooks the hook 32 of the limiting rod 30 onto the sleeve 11 of the emergency duct 10, thereby driving the sleeve 11 of the emergency duct 10 to align with the cover hole 210 of the furnace cover 200. During this process, the sleeve 11 enters the limiting space 325 of the hook 32 through the opening 324. Because the width of the limiting space 325 gradually decreases away from the opening 324, the width is greatest at the opening 324, making it easier for the sleeve 11 to enter the hook 32, allowing the sleeve 11 to move along with the limiting rod 30. Subsequently, the lifting rope 23 is lowered by the operating end, causing the emergency guide tube 10 to move downward and the sleeve 11 to pass through the cover hole 210 of the furnace cover 200 until the bottom of the sleeve 11 is inserted into the furnace cover 200 at a distance of approximately 800 mm from the molten steel. After the emergency conduit 10 enters the cover hole 210, operator B uses the limiting rod 30 to adjust the position of the sleeve 11 so that the top of the sleeve 11 is located below the fixed inner conduit 400 of the wire feeder. Operator A then pulls up the lifting rope 23 to raise the emergency conduit 10 and insert it into the fixed inner conduit 400, completing the insertion. Finally, operator A detachably connects the lifting rope 23 to the work platform 50, and operator B controls the limiting rod 30 so that the second straight rod section 322 of the hook portion 32 of the limiting rod 30 passes through the socket 131 of the sleeve 11. Because the length of the limiting rod 30 is greater than the aperture of the cover hole 210 of the LF furnace cover 200, once the limiting rod 30 is connected to the emergency conduit 10, the sleeve 11 of the emergency conduit 10 is locked in the cover hole 210, preventing the emergency conduit 10 from moving freely, allowing wire feeding operations to resume. The installation process of the emergency conduit 10 is simple and can be completed in as little as one minute.

[0033] When the emergency catheter 10 needs to be removed, first, operator A and operator B are located on the working platform 50. Operator A removes the limiting rod 30 from the emergency catheter 10, and operator B controls the operating end of the lifting rope 23 to lower the emergency catheter 10 and detach it from the fixed inner catheter 400. Operator A and operator B cooperate with each other. Operator A pushes the emergency catheter 10 to the appropriate position of the cover hole 210 through the limiting rod 30, and then operator B pulls the emergency catheter 10 out to the working platform 50 through the lifting rope 23, and the disassembly of the emergency catheter 10 is completed.

[0034] The above-mentioned emergency duct 10 applied to the LF furnace wire feeder can adjust the position of the emergency duct 10 through the lifting assembly 20 and the limit rod 30 when the movable outer duct of the wire feeder fails to feed wire due to steel sticking, so that the sleeve 11 can be inserted into the cover hole 210 of the furnace cover 200 of the LF furnace, and the top end of the sleeve 11 can be installed on the outside of the fixed inner duct of the LF furnace wire feeder to replace the movable outer duct, so that the wire feeder can still feed wire when the movable outer duct fails to stick to steel, thereby reducing the loss of the casting machine caused by the viscosity of the molten steel.

[0035] When using the above-mentioned emergency duct device applied to the LF furnace wire feeder to deal with the accident of the movable external duct of the wire feeder, the emergency duct 10 is installed by using the cooperation of the lifting component 20 and the limit rod 30, and the installation time is about 1.5 minutes. The installation time is about 4 minutes when the emergency duct 10 is installed on the shelf while wearing a safety belt. Therefore, the utility model uses the cooperation of the lifting component 20 and the limit rod 30 to save about 63% of the time, greatly shortens the installation time, and improves the work efficiency when installing the emergency duct 10.

[0036] When installing the emergency duct 10 of the present invention, the operator only needs to operate the hoisting assembly 20 and the limit rod 30 in the working platform 50 away from the LF furnace, thereby ensuring the safety of the operator to a great extent.

[0037] The above description is a detailed description of the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. An emergency conduit device for a LF furnace wire feeder, characterized by: The invention comprises an emergency conduit (10), a hoisting assembly (20) and a limiting rod (30), wherein the emergency conduit (10) comprises a sleeve (11) and a plug-in portion (13), wherein the plug-in portion (13) is fixed to the outer peripheral surface of the sleeve (11); the hoisting assembly (20) is connected to the sleeve (11), and the limiting rod (30) is detachably plugged into the plug-in portion (13), and the length of the limiting rod (30) is greater than the aperture of the cover hole (210) of the furnace cover (200) of the LF furnace. The position of the emergency conduit (10) can be adjusted by the cooperation of the hoisting assembly (20) and the limiting rod (30).

2. The emergency conduit device for the LF furnace wire feeder according to claim 1, characterized in that: The hoisting assembly (20) comprises a bracket (21), a fixed pulley (22) and a hoisting rope (23); the fixed pulley (22) is rotatably mounted on the bracket (21); the fixed pulley (22) is located above the sleeve (11); the hoisting rope (23) is wound around the fixed pulley (22); one end of the hoisting rope (23) is connected to the sleeve (11); and the other end of the hoisting rope (23) is an operating end.

3. The emergency conduit device for the LF furnace wire feeder according to claim 2, characterized in that: A working platform (50) is provided on one side of the LF furnace, and the operating end of the suspension rope (23) and the limiting rod (30) can extend to the working platform (50).

4. The emergency conduit device for a LF furnace wire feeder according to claim 1, characterized in that: The plug-in portion (13) is provided with a socket (131), and one end of the limiting rod (30) is detachably plugged into the socket (131).

5. The emergency conduit device for the LF furnace wire feeder according to claim 4, characterized in that: The limiting rod (30) comprises a gripping portion (31) and a hook portion (32) fixedly connected to one end of the gripping portion (31), and the hook portion (32) is detachably inserted into the socket (131).

6. The emergency conduit device for the LF furnace wire feeder according to claim 5, characterized in that: The hook portion (32) comprises a first straight rod segment (321), a second straight rod segment (322) and an arc segment (323) connecting the first straight rod segment (321) and the second straight rod segment (322); an end of the first straight rod segment (321) away from the arc segment (323) is connected to the gripping portion (31); the second straight rod segment (322) is detachably inserted into the socket (131); the first straight rod segment (321), the second straight rod segment (322) and the arc segment (323) are arranged to form a limiting space (325) having an opening (324); when the limiting rod (30) and the socket (131) are in a separated state, the sleeve (11) can enter the limiting space (325) through the opening (324).

7. The emergency conduit device for a LF furnace wire feeder according to claim 6, characterized in that: The first straight rod section (321) is tilted relative to the gripping portion (31), and the second straight rod section (322) is perpendicular to the gripping portion (31), so that the width of the limiting space (325) gradually decreases in a direction away from the opening (324).

8. The emergency conduit device for a LF furnace wire feeder according to claim 2, characterized in that: A hanging ring (14) is fixed on the outer peripheral surface of the sleeve (11), and the hanging ring (14) is located above the plug-in portion (13). One end of the hanging rope (23) is connected to the hanging ring (14).

9. The emergency conduit device for a LF furnace wire feeder according to claim 8, characterized in that: The sling rope (23) and the hanging ring (14) are detachably connected together via a shackle (40).

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