A tundish nozzle reaming device

Abstract

The utility model discloses a tapping hole reaming device, including the conical stake, the conical stake outside is equipped with the tool rest, the number of tool rest is four, even a plurality of blades are connected on the tool rest, and the detachable mechanism is equipped between tool rest and the conical stake, and the detachable mechanism includes the wedge block of setting at tool rest one side, is equipped with the wedge groove on the conical stake, and the wedge block is matched with the wedge groove, and the wedge block one side is connected with the mounting panel, and the mounting panel is connected with the conical stake through the first bolt, and the wedge groove one side is equipped with the baffle, and the baffle is connected with the tool rest through the second bolt, the utility model discloses the detachable mechanism that sets up by the wedge block, the wedge groove, the mounting panel and the first bolt between tool rest and the conical stake, has realized the modularization installation of tool rest, when the blade wears or is damaged, only needs to loosen the bolt, and the corresponding tool rest can be replaced fast, does not need to replace the drill bit as a whole, improves the maintainability of device.

Description

Technical Field

[0001] This utility model relates to the field of steel outlet enlargement technology, specifically to a steel outlet enlargement device. Background Technology

[0002] In steelmaking processes such as converters and electric furnaces, the taphole is the crucial channel for molten steel to exit the furnace. As smelting operations continue, the refractory material inside the taphole gradually erodes, becomes blocked, or deforms due to the scouring effect of high-temperature molten steel, thermal shock erosion, and slag solidification, leading to obstructed tapping and even safety accidents. Therefore, during each tapping or maintenance cycle, the taphole needs to be cleaned and enlarged to restore its designed diameter and unobstructed flow. Currently, this critical process is generally accomplished using mechanized enlarging devices. These devices are typically installed at the front end of the telescopic arm of a furnace dismantling machine or a specialized maintenance robot. The axial propulsion and rotation of the telescopic arm drive a high-speed rotation of the enlarging device mounted at its end. The device utilizes a carbide cutter head mounted at its front end to cut, break, and remove sintered material, residual refractory, and solidified slag from the inner wall of the taphole, achieving precise and efficient enlarging operations.

[0003] Existing reaming devices mostly adopt an integral drill bit structure, with the cutting edge fixedly welded or integrally formed onto the drill body. Due to the complex composition and extremely high hardness of the material inside the steel outlet, the cutting edge is subjected to high-intensity impact, friction, and heat load for a long time during the reaming process, making it prone to localized wear, chipping, or even breakage. Once a cutting edge is damaged, the entire drill bit becomes unusable and must be replaced entirely. However, the integral structure leads to the scrapping of the entire drill bit, resulting in high maintenance costs and poor economic efficiency. Utility Model Content

[0004] In view of the problems in the related technologies, this utility model proposes a steel outlet enlarging device to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] Therefore, the specific technical solution adopted by this utility model is as follows:

[0006] A steel outlet enlarging device includes a conical pile, four tool holders with a number of blades evenly connected to the outer side of the conical pile, a detachable mechanism between the tool holders and the conical pile, the detachable mechanism including a wedge block on one side of the tool holder, a wedge groove on the conical pile, the wedge block matching the wedge groove, an mounting plate connected to one side of the wedge block, the mounting plate being connected to the conical pile by a first bolt, and a baffle on one side of the wedge groove being connected to the tool holder by a second bolt.

[0007] Furthermore, the baffle is connected to the tapered pile.

[0008] Furthermore, to facilitate the installation of the central drill bit, a central drill bit is provided at the top of the tapered pile, and a mounting seat is connected to the bottom of the central drill bit. The tapered pile is provided with a mounting groove, and the mounting seat matches the mounting groove.

[0009] Furthermore, in order to fix the central drill bit, a connecting plate is connected to the outside of the mounting base, and the connecting plate is connected to the tapered pile by a third bolt.

[0010] Furthermore, in order to connect the connecting shaft to the telescopic arm of the furnace dismantling machine, a connecting shaft is connected to the bottom end of the conical pile, and the connecting shaft is provided with an embedded groove.

[0011] Furthermore, mounting holes are provided on the connecting shaft.

[0012] Furthermore, to ensure the chip removal function of this hole-reaming device, several chip removal grooves are evenly provided on the tool holder.

[0013] The beneficial effects of this utility model are as follows:

[0014] (1) This device achieves modular installation of the tool holder by setting a detachable mechanism consisting of a wedge block, a wedge groove, a mounting plate, and a first bolt between the tool holder and the tapered pile. The wedge block and the wedge groove are fitted with an inclined surface, which can achieve self-centering positioning and ensure the coaxiality and stability of the tool holder installation; at the same time, the mounting plate is fixed to the tapered pile by the first bolt, so that the wedge block is firmly pressed into the wedge groove, resulting in high connection strength and good vibration resistance. When the blade is worn or damaged, the corresponding tool holder can be quickly replaced simply by loosening the bolt, without the need to replace the entire drill bit, thus improving the maintainability of the device.

[0015] (2) A central drill bit is installed at the top of the tapered pile for pre-drilling, achieving precise centering and stress release, thus preventing displacement during hole reaming. The central drill bit is connected to the mounting groove on the tapered pile via its bottom mounting seat for radial positioning; then, the mounting seat is locked to the tapered pile by the connecting plate and the third bolt to ensure axial fixation. This structure not only ensures the installation accuracy of the central drill bit, but also facilitates the individual replacement of central drill bits of different specifications or types to adapt to steel outlets of different materials or degrees of blockage, improving operational flexibility and hole reaming quality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1This is a front view of a steel outlet expansion device according to an embodiment of the present utility model;

[0018] Figure 2 This is a bottom structural diagram of a steel outlet expansion device according to an embodiment of the present utility model;

[0019] Figure 3 This is a disassembly diagram of the center drill bit of a steel outlet reaming device according to an embodiment of the present utility model;

[0020] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a disassembly diagram of the tool holder of a steel outlet reaming device according to an embodiment of the present utility model.

[0022] In the picture:

[0023] 1. Conical pile; 2. Tool holder; 3. Blade; 4. Detachable mechanism; 401. Wedge block; 402. Wedge groove; 403. Mounting plate; 404. First bolt; 405. Baffle; 406. Second bolt; 5. Center drill bit; 6. Mounting base; 7. Mounting groove; 8. Connecting plate; 9. Third bolt; 10. Connecting shaft; 11. Embedded groove; 12. Mounting hole; 13. Chip removal groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] According to an embodiment of the present invention, a steel outlet expansion device is provided.

[0026] like Figures 1-5As shown, the steel outlet expansion device according to an embodiment of the present invention includes a conical pile 1, with a tool holder 2 on the outer side of the conical pile 1. There are four tool holders 2, evenly distributed along the circumference at 90° intervals, forming a stable four-point cutting structure. This ensures balanced force during cutting, effectively reducing vibration and uneven loading. Several blades 3 are evenly connected to the tool holder 2, and multiple chip removal grooves 13 are evenly provided on the tool holder 2. A detachable mechanism 4 is provided between the tool holder 2 and the conical pile 1. The detachable mechanism 4 includes a wedge-shaped block 401 located on one side of the tool holder 2. A wedge-shaped groove 402 is provided on the conical pile 1, and the wedge-shaped block 401 matches the wedge-shaped groove 402. A mounting plate 403 is connected to one side of 401. The mounting plate 403 is attached to the outer surface of the conical pile 1 and is firmly locked to the conical pile 1 by the first bolt 404, thereby pressing the wedge block 401 into the wedge groove 402 to achieve axial fixation of the tool holder 2. A baffle 405 is provided on one side of the wedge groove 402. The baffle 405 is connected to the conical pile 1 and is connected to the tool holder 2 by the second bolt 406. By setting the second bolt 406, the overall connection rigidity and stability of the tool holder 2 are enhanced, preventing axial displacement or loosening and falling off of the tool holder 2 under high-speed rotation and impact load, and significantly improving the safety and reliability of the device operation.

[0027] like Figures 1-4 As shown, the tapered pile 1 has a central drill bit 5 at its top, which can drill into the center of the steel outlet before the main cutter holder 2 cuts, serving to guide the direction and release internal stress. The bottom of the central drill bit 5 is connected to a mounting base 6, which has a hexagonal cross-section. By designing the mounting base 6 as a hexagonal structure, it can effectively prevent the central drill bit 5 from slipping or rotating circumferentially during high-speed rotation. Furthermore, the hexagon is a typical non-circular symmetrical structure with self-positioning characteristics, which facilitates the installation of the central drill bit 5. The tapered pile 1 has a mounting groove 7, and the mounting base 6 matches the mounting groove 7. The mounting base 6 is connected to a connecting plate 8 on the outside. The connecting plate 8 is connected to the tapered pile 1 by a third bolt 9, which can firmly lock the center drill bit 5 in the working position, ensuring cutting stability and facilitating the replacement of different specifications of center drill bits 5 according to actual working conditions. The bottom end of the tapered pile 1 is connected to a connecting shaft 10. The connecting shaft 10 is provided with an embedding groove 11, which can be quickly engaged with the power chuck at the front end of the furnace dismantling machine telescopic arm to transmit rotational power and axial thrust. The connecting shaft 10 is provided with a mounting hole 12, which can be further installed and fixed by bolts.

[0028] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0029] When this reaming device is in operation, the entire device can be quickly engaged with the power chuck at the front end of the furnace dismantling machine's telescopic arm via the bottom connecting shaft 10, and then locked again using the mounting hole 12 to ensure the continuity and safety of power transmission. When the reaming device approaches the taphole, the central drill bit 5 first contacts and cuts into the central area of ​​the taphole. Due to its concentrated tip and low cutting resistance, it can quickly drill into the sintered layer or residual refractory material, playing a precise centering role. As the central drill bit 5 penetrates deeper, the main tool holder 2 begins to function. Four evenly distributed tool holders 2 are symmetrically arranged along the circumference, forming a stable four-point cutting structure. The carbide blades 3 equipped on each tool holder 2 cut and break the inner wall of the taphole layer by layer under high-speed rotation. Meanwhile, the multiple chip removal grooves 13 on the tool holder 2 effectively guide the chips generated during cutting to be discharged outward, avoiding the jamming phenomenon caused by chip accumulation. If a certain cutting tool 3 is found to be severely worn or damaged, the tool holder 2 can be disassembled and replaced by loosening the first bolt 404 and the second bolt 406, and then removing the wedge block 401 from the inside of the wedge groove 402. Then, by installing the wedge block 401 into the inside of the wedge groove 402 and fixing it with the first bolt 404 and the second bolt 406, the tool can be modularly replaced. When the center drill bit 5 needs to be replaced according to the actual working conditions of different steel outlets, the mounting seat 6 can be removed from the mounting groove 7 by removing the third bolt 9, and then the mounting seat 6 on one side of the new center drill bit 5 can be installed in the mounting groove 7 and fixed with the third bolt 9 to install the center drill bit 5.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A steel tap hole enlarging device, characterized in that, The device includes a conical pile (1), a tool holder (2) on the outside of the conical pile (1), four tool holders (2), and several blades (3) evenly connected on the tool holders (2). A detachable mechanism (4) is provided between the tool holders (2) and the conical pile (1). The detachable mechanism (4) includes a wedge block (401) on one side of the tool holder (2), a wedge groove (402) on the conical pile (1), the wedge block (401) and the wedge groove (402) are matched, an installation plate (403) is connected to one side of the wedge block (401), the installation plate (403) and the conical pile (1) are connected by a first bolt (404), a baffle (405) is provided on one side of the wedge groove (402), and the baffle (405) and the tool holder (2) are connected by a second bolt (406).

2. The steel tapping hole enlarging device according to claim 1, characterized in that, The baffle (405) is connected to the cone pile (1).

3. The steel tapping hole enlarging device according to claim 1, characterized in that, The tapered pile (1) has a central drill bit (5) at the top and a mounting seat (6) at the bottom. The tapered pile (1) has a mounting groove (7) and the mounting seat (6) matches the mounting groove (7).

4. The steel outlet reaming device according to claim 3, characterized in that, The mounting base (6) is connected to a connecting plate (8) on the outside. The connecting plate (8) is connected to the tapered pile (1) by a third bolt (9).

5. The steel tapping hole enlarging device according to claim 1, characterized in that, The bottom end of the tapered pile (1) is connected to a connecting shaft (10), and the connecting shaft (10) is provided with an embedded groove (11).

6. The steel outlet reaming device according to claim 5, characterized in that, The connecting shaft (10) is provided with mounting holes (12).

7. The steel tapping hole enlarging device according to claim 1, characterized in that, The tool holder (2) is provided with several chip removal grooves (13) evenly distributed.

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