KR molten iron desulphurization stirrer device

Abstract

The utility model relates to a KR molten iron desulfurization stirrer device. The utility model particularly relates to a KR molten iron desulfurization stirrer device which can be quickly mounted and dismounted. The stirrer can be replaced more conveniently and quickly, the replacement time is shortened, and favorable conditions are created for stable and continuous production. Comprising a stirrer driving part and a stirring execution part, the stirring execution part comprises a sleeve, a lock catch ring and a stirring head, and the sleeve is detachably connected with the stirring head through the lock catch ring; the sleeve is detachably connected with the stirring execution part through a connecting piece; the stirring head comprises a stirring rod, a cross-shaped stirring head is arranged at the bottom of the stirring rod, a plurality of connecting boss blocks are arranged on the side wall of the top of the stirring rod along the periphery at equal intervals, and key grooves are formed among the connecting boss blocks; the sleeve comprises a cylindrical outer shell with the bottom open, a circle of protruding edge is arranged at the bottom of the outer shell, and a plurality of keys are arranged on the inner wall of the sleeve at equal intervals. And when the sleeve sleeves the top of the stirring rod, each key is positioned in the corresponding key slot.

Description

Technical Field

[0001] The utility model relates to a KR molten iron desulfurization stirrer, in particular to a KR molten iron desulfurization stirrer device; specifically, it is a KR molten iron desulfurization stirrer device which can realize rapid installation and disassembly. Background Art

[0002] KR hot metal pre-desulfurization is a process to remove the harmful element "sulfur" in molten steel that causes hot brittleness, reduces the mechanical properties of steel, and affects the corrosion resistance of steel. The use of KR hot metal pre-desulfurization can not only reduce the burden on blast furnaces and improve production efficiency, but also reduce the difficulty of smelting in the converter due to high sulfur in the hot metal entering the furnace, and effectively reduce a series of problems such as low converter desulfurization efficiency, deterioration of furnace conditions caused by the final sulfur high point blowing treatment, strong oxidation of molten steel, low alloy absorption rate, and large loss of steel materials. Therefore, hot metal desulfurization has become an important means for modern steel industry to optimize process flow, and is a major measure to improve molten steel quality and expand varieties.

[0003] For high-sulfur hot metal, it needs to enter the KR hot metal desulfurization station for pre-desulfurization before entering the furnace to reduce the sulfur content in the hot metal, create good conditions for converter smelting, and reduce the desulfurization burden in the converter. Hot metal desulfurization requires adding desulfurizer or lime powder to the hot metal ladle, and slowly lowering the stirring head into the hot metal through a mechanical lifting device to rotate it, so that the hot metal in the hot metal tank forms a vortex, so that the hot metal and the desulfurizer are fully in contact and react, so as to improve the desulfurization efficiency of the desulfurizer. During use, the stirring head is constantly washed and eroded by the hot metal, the refractory material of the stirring head falls off, and the desulfurization effect deteriorates, and a new stirring head needs to be replaced frequently.

[0004] The agitator equipment currently used in the KR hot metal desulfurization process is generally designed to be fastened and assembled with the end of the drive equipment by bolt connection. This connection structure means that when the agitator needs to be replaced and maintained, the operator must follow strict operating procedures to loosen and disassemble all the bolt components that fix the agitator one by one. Since the KR hot metal desulfurization agitator usually works in high temperature, heavy load and complex working conditions, these bolts often become more difficult to disassemble due to long-term high temperature oxidation, erosion and mechanical stress. This undoubtedly increases the overall maintenance cycle and downtime, affecting the continuity and efficiency of steelmaking production. Summary of the invention

[0005] The utility model aims to solve the defects of the prior art and provide a KR hot metal desulfurization agitator device. The utility model aims to design an agitator connector structure to make the agitator replacement more convenient and faster, shorten the replacement time, and create favorable conditions for stable and continuous production.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme, including an agitator driving unit and a stirring execution unit connected to the agitator driving unit, the stirring execution unit includes a sleeve, a locking ring and a stirring head, the sleeve is detachably connected to the stirring head via a locking ring; the sleeve is detachably connected to the stirring execution unit via a connecting piece.

[0007] The stirring head comprises a stirring rod, a cross stirring head is arranged at the bottom of the stirring rod, a plurality of connecting boss blocks are arranged at equal intervals along the outer circumference of the top side wall of the stirring rod, and key grooves are formed between the connecting boss blocks.

[0008] The sleeve comprises a cylindrical outer shell with an open bottom, a convex edge is arranged at the bottom of the outer shell, and a plurality of keys are arranged at equal intervals on the inner wall of the sleeve; the number and shape of the keys match the key slots; when the sleeve is sleeved on the top of the stirring rod, each key is located in the corresponding key slot. It is used for radial limiting.

[0009] Furthermore, the number of the connecting boss blocks and keys is 4.

[0010] Furthermore, the locking ring includes a left and a right half locking ring hinged at the first end, the second ends of the two half locking rings are connected by a connecting piece, and the two half locking rings have the same structure, both including an upper stop edge and a lower stop edge. When the two half locking rings are buckled into a locking ring, an inner edge space is formed between the upper stop edge and the lower stop edge for accommodating the inner edge of the outer shell.

[0011] Furthermore, the left half locking ring is hinged to the right half locking ring through a pin.

[0012] Furthermore, an ear is provided at the second end of the left half locking ring and the second end of the right half locking ring, and a mounting hole is provided on each ear. After the two half locking rings are buckled into a locking ring, the two ears are positioned correspondingly and in contact with each other. A bolt passes through the mounting holes of the two half locking rings in turn and is tightened with a nut.

[0013] Furthermore, when in use, the sleeve covers the top of the stirring rod, the key is located in the keyway, and the inner edge of the outer shell is located in the inner edge space formed by the upper stop edge and the lower stop edge.

[0014] Furthermore, a boss block space for accommodating the connecting boss block is formed between two adjacent keys, and when the sleeve is sleeved on the top of the stirring rod, the connecting boss block is located in the corresponding boss block space.

[0015] Furthermore, a connecting screw hole is provided on the sleeve, and the sleeve is connected to the stirring driving part by a screw, and the screw is screwed into the connecting screw hole to realize the connection between the sleeve and the stirring driving part.

[0016] Furthermore, both sides of the top of each connecting boss block adopt a guiding arc transition, and the arc is bent toward the bottom of the connecting boss block.

[0017] Compared with the prior art, the utility model has beneficial effects.

[0018] The replacement of the KR molten iron desulfurization agitator device of the utility model adopts a four-keyway structure connection evenly distributed between the sleeve. This structure has fast operation and connection, and the agitator can transmit a larger torque during the stirring process.

[0019] The stirring rod and the sleeve of the utility model are connected axially by a lock, which is reliable and easy to disassemble. When in use, it can be opened by simply unfastening a bolt of the lock ring, so as to separate the stirring rod from the sleeve; each time the stirring rod is disassembled, the connection between the stirrer and the driving device in the prior art can be replaced by the disassembly of the stirring head and the sleeve, thus achieving easy disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. The protection scope of the utility model is not limited to the following descriptions.

[0021] Figure 1 This is a three-dimensional view of the KR molten iron desulfurization agitator device in Example.

[0022] Figure 2 It is a three-dimensional view of the stirring head of the KR molten iron desulfurization stirring device in Example.

[0023] Figure 3 It is a three-dimensional view of the sleeve of the KR molten iron desulfurization agitator device in Example.

[0024] Figure 4 This is the front view of the KR molten iron desulfurization agitator device in Example.

[0025] Figure 5 This is a cross-sectional view BB of the KR molten iron desulfurization agitator device of embodiment.

[0026] Figure 6 This is a three-dimensional view of the lock of the KR molten iron desulfurization agitator device of embodiment.

[0027] In the figure, 1 is a stirring head, 2 is a locking ring, and 3 is a sleeve;

[0028] 101 is a cross stirring head, 102 is a stirring rod, 103 is a connecting boss block, 104 is a keyway, and 105 is a guide arc;

[0029] 201 is a left locking ring, 202 is a right locking ring, 203 is a pin, 204 is a mounting hole, 205 is an upper stop edge, and 206 is a lower stop edge;

[0030] 301 is the outer shell, 302 is the flange, 303 is the key, and 304 is the connecting screw hole. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and beneficial effects of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments.

[0032] The utility model is to propose a modification plan for the agitator structure in view of the low replacement efficiency of the existing agitator device and its inability to meet the use requirements. Figure 1-6 As shown, the KR molten iron desulfurization agitator device includes an agitator drive unit and a stirring execution unit connected to the agitator drive unit, the stirring execution unit includes a sleeve 3, a locking ring 2 and a stirring head 1, the sleeve 3 is detachably connected to the stirring head 1 through the locking ring 2; the sleeve 3 is detachably connected to the stirring execution unit through a connecting piece; the stirring head 1 includes a stirring rod 102, a cross stirring head 101 is provided at the bottom of the stirring rod 102, a plurality of connecting boss blocks 103 are arranged at equal intervals along the outer circumference of the top side wall of the stirring rod 102, and keyways 104 are formed between the two connecting boss blocks 103; the sleeve 3 includes a cylindrical outer shell 301 with an open bottom, a circle of convex edges 302 are provided at the bottom of the outer shell 301, and a plurality of keys 303 are arranged at equal intervals on the inner wall of the sleeve 3; and the number and shape of the keys 303 are compatible with the keyways 104; when the sleeve 3 is sleeved on the top of the stirring rod 102, each key 303 is located in the corresponding keyway 104.

[0033] Preferably, the number of the connecting boss blocks 103 and the number of the keys 303 are both four.

[0034] Preferably, the locking ring 2 comprises a left and a right half locking ring hinged at the first end, the second ends of the two half locking rings are connected by a connecting piece, and the two half locking rings have the same structure, both comprising an upper retaining edge 205 and a lower retaining edge 206. When the two half locking rings are buckled into the locking ring 2, an inner edge space for accommodating the inner edge of the outer shell 301 is formed between the upper retaining edge 205 and the lower retaining edge 206. It mainly plays the role of axial limiting.

[0035] More preferably, the left half locking ring is hinged to the right half locking ring via a pin 203 .

[0036] More preferably, an ear is provided at the second end of the left half locking ring and the second end of the right half locking ring, and a mounting hole 204 is provided on each ear. After the two half locking rings are buckled into a locking ring 2, the two ears are positioned correspondingly and in contact with each other. A bolt passes through the mounting holes 204 of the two half locking rings in turn and is tightened with a nut.

[0037] More preferably, when in use, the sleeve 3 covers the top of the stirring rod 102 , the key 303 is located in the key slot 104 , and the inner edge of the outer shell 301 is located in the inner edge space formed by the upper stop edge 205 and the lower stop edge 206 .

[0038] Preferably, a boss block space for accommodating the connecting boss block 103 is formed between two adjacent keys 303 , and when the sleeve 3 is sleeved on the top of the stirring rod 102 , the connecting boss block 103 is located in the corresponding boss block space.

[0039] Preferably, a connection screw hole 304 is provided on the sleeve 3, and the sleeve 3 is connected to the stirring drive unit by a screw, and the screw is screwed into the connection screw hole 304. This is the connection between the sleeve 3 and the stirring drive unit. Each time the disassembly is performed, the disassembly of the stirring head and the sleeve 3 can be used to replace the connection between the stirrer and the driving device in the prior art, thereby achieving convenient disassembly.

[0040] Preferably, both sides of the top of each connecting boss block 103 are transitioned by a guide arc 105, and the arc is bent toward the bottom of the connecting boss block 103. The key 303 is adapted to the shape of the key slot 104, that is, the shape of the key satisfies that it is just located in the key slot 104, and the key and the key slot 104 have similar contours and fit each other.

[0041] The transition design of the guide arc 105 is used to ensure the correct alignment and easy insertion of the sleeve 3 and the end of the stirring rod 102.

[0042] Specifically: First, alignment can be achieved: when the sleeve 3 and the end of the stirring rod 102 are inserted into each other, the guide arc can guide the two to dock accurately to prevent damage caused by deflection. Second, friction can be reduced. The guide arc can reduce resistance during the insertion process, making the connection operation smoother. Third, stress dispersion: during the insertion process, the guide arc helps to evenly distribute the contact pressure to avoid excessive local stress that causes connection failure or damage to the contact surface.

[0043] Combined with the attached drawings, the specific application scenarios, usage process and working principle of the embodiments are described below:

[0044] 1. When the KR hot metal desulfurization station needs to replace the new agitator, the new agitator should be in place first.

[0045] 2. The sleeve 3 is pre-installed at the end of the driving device of the agitator through the connecting screw hole 304.

[0046] 3. After the new agitator (actually the mixing head) is transferred to the working position, insert the installed sleeve 3 into the end of the mixing rod 102 of the mixing head (at this time, the key is located in the keyway 104, and the connecting boss block 103 is located in the boss block space), and then lock the sleeve 3 and the mixing head through the locking ring 2, and fix them with bolts at the mounting hole 204 of the locking ring 2 to achieve quick replacement of the mixing head.

[0047] 4. The lower stop edge of the locking ring 2 contacts the lower end surface of the connecting boss block 103, and the upper stop edge 205 contacts the upper end surface of the convex edge 302 of the sleeve 3. The locking action fixes the sleeve 3 and the stirring head in the axial direction.

[0048] 5. The guide arc (designed as guide arc 105 ) on the top of the connecting boss block 103 can play a guiding role when the sleeve 3 is inserted, so that the key can be quickly inserted into the keyway 104 .

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. Therefore, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope defined by the claims of the present invention.

Claims

1. A KR hot metal desulfurization agitator device, comprising an agitator driving unit and a stirring execution unit connected to the agitator driving unit, characterized in that: The stirring execution part comprises a sleeve, a locking ring and a stirring head, wherein the sleeve is detachably connected to the stirring head via the locking ring; the sleeve is detachably connected to the stirring execution part via a connecting piece; The stirring head comprises a stirring rod, a cross stirring head is arranged at the bottom of the stirring rod, a plurality of connecting boss blocks are arranged at equal intervals along the outer circumference of the top side wall of the stirring rod, and key grooves are formed between the two connecting boss blocks; The sleeve comprises a cylindrical outer shell with an open bottom, a convex edge is arranged at the bottom of the outer shell, and a plurality of keys are arranged at equal intervals on the inner wall of the sleeve; and the number and shape of the keys are matched with the key slots; when the sleeve is sleeved on the top of the stirring rod, each key is located in the corresponding key slot.

2. A KR hot metal desulfurization agitator device according to claim 1, characterized in that: The number of the connecting boss blocks and keys is 4.

3. A KR hot metal desulfurization agitator device according to claim 1, characterized in that: The locking ring includes a left and a right half locking ring hinged at the first end, and the second ends of the two half locking rings are connected by a connecting piece. The two half locking rings have the same structure and both include an upper stop edge and a lower stop edge. When the two half locking rings are buckled into a locking ring, an inner edge space is formed between the upper stop edge and the lower stop edge to accommodate the inner edge of the outer shell.

4. A KR hot metal desulfurization agitator device according to claim 3, characterized in that: The left half lock ring is hinged with the right half lock ring through a pin.

5. A KR hot metal desulfurization agitator device according to claim 3 or 4, characterized in that: The second end of the left half locking ring and the second end of the right half locking ring are each provided with an ear, and each ear is provided with a mounting hole. After the two half locking rings are buckled together into a locking ring, the two ears are positioned correspondingly and in contact with each other. A bolt passes through the mounting holes of the two half locking rings in turn and is tightened with a nut.

6. A KR hot metal desulfurization agitator device according to claim 5, characterized in that: When in use, the sleeve covers the top of the stirring rod, the key is located in the key slot, and the inner edge of the outer shell is located in the inner edge space formed by the upper stop edge and the lower stop edge.

7. A KR hot metal desulfurization agitator device according to claim 1, characterized in that: A boss block space for accommodating the connecting boss block is formed between two adjacent keys. When the sleeve is sleeved on the top of the stirring rod, the connecting boss block is located in the corresponding boss block space.

8. A KR hot metal desulfurization agitator device according to claim 1, characterized in that: The sleeve is provided with a connecting screw hole, and the sleeve is connected to the stirring driving part through a screw, and the screw is screwed into the connecting screw hole.

9. A KR hot metal desulfurization agitator device according to claim 1, characterized in that: Both sides of the top of each connecting boss block adopt a guide arc transition, and the arc is bent toward the bottom of the connecting boss block.

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