Composite tapping channel

Abstract

The utility model relates to a composite tapping channel, which is characterized in that the upper edges of the two ends of a tapping channel base body are provided with connecting half grooves, and special-shaped connecting pins matched with the connecting half grooves are longitudinally and movably inserted into the connecting half grooves; after the adjacent tapping channel base bodies are correspondingly placed, the special-shaped connecting pins are inserted into the two corresponding connecting half grooves so as to limit and connect the adjacent tapping channel base bodies in the horizontal direction, and then bolts penetrate through the two corresponding half through holes to be connected with threaded holes in the special-shaped connecting pins so as to lock the positions of the special-shaped connecting pins in the connecting half grooves. The adjacent tapping channel base bodies are limited in the vertical direction, and connection of the tapping channel base bodies is further stabilized. When the tapping channel is locally damaged, the bolts on the tapping channel base bodies of the corresponding sections are screwed out in sequence, then the special-shaped connecting pins are pulled out upwards in sequence, the damaged tapping channel base bodies can be detached, replacement is convenient, pertinence is high, time and labor are saved, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace tapping trough technology, and in particular to a composite tapping trough. Background Technology

[0002] The tapping trough of a blast furnace is used to separate slag and iron, directing molten iron into a ladle and slag into slag treatment and crushing equipment. The tapping trough is laid within a steel plate trench or on a concrete foundation. Its main structure includes two refractory linings: a permanent lining and a working lining. The permanent lining is constructed of refractory bricks or monolithic refractory materials, while the working lining is currently mostly cast from monolithic refractory materials. As an integral part of blast furnace production, the tapping trough is a necessary channel for molten iron to flow from the furnace through the taphole to the ladle. It is subjected to the high temperature and scouring of molten iron for extended periods, operating under conditions of high temperature, high pressure, and strong abrasion. It must withstand not only the erosion of the refractory material surface caused by the flow of molten iron and slag but also the thermal stress generated by temperature fluctuations, making it prone to problems such as burning, deformation, and cracking, requiring periodic replacement. Currently, most blast furnace tapping troughs adopt an integral structure, requiring complete replacement even when partially damaged, resulting in high production costs.

[0003] Chinese utility model patent CN220300764U discloses a long-life blast furnace tapping trough. It features a slidingly connected fixed groove and a fixed sliding plate at both ends of a refractory protection plate to form an integral structure of the tapping trough. Adjacent refractory protection plates are fixedly connected by fixed connecting pieces and bolts, allowing the tapping trough to be disassembled and replaced individually. However, because the connection surface between the fixed groove and the fixed sliding plate is an L-shaped interlocking structure, when a part of the tapping trough is damaged, the damaged and adjacent sections must be disassembled, extending to the end of the entire trough. Therefore, a considerable number of tapping troughs still need to be disassembled, which is time-consuming, labor-intensive, and inconvenient to use. Utility Model Content

[0004] The technical problem this utility model aims to solve is that the existing blast furnace tapping trough has an L-shaped interlocking structure between the fixed chute and the fixed slide plate. When the tapping trough is partially damaged, the damaged and adjacent tapping troughs need to be disassembled, which extends to the end of the entire tapping trough. Therefore, a lot of tapping troughs still need to be disassembled, which is time-consuming, labor-intensive, and inconvenient to use.

[0005] To address the aforementioned problems, this utility model provides a composite iron discharge trough. The inner side of the trough base is provided with a protective layer. Connecting semi-grooves are formed along the upper edges of both ends of the trough base. A shaped connecting pin is longitudinally inserted into the connecting semi-grooves to limit the movement of adjacent trough bases in the horizontal direction. A semi-through hole communicating with the connecting semi-grooves is formed on the trough base. A threaded hole corresponding to the semi-through hole is formed on the shaped connecting pin. A bolt that mates with the threaded hole is movably inserted into the semi-through hole to limit the movement of adjacent trough bases in the vertical direction.

[0006] The composite iron tapping trough provided by this utility model also has the following technical features:

[0007] The horizontal cross-sectional shape of the connecting half-groove is dovetail-shaped, C-shaped, or T-shaped.

[0008] Connecting half-grooves are provided on both sides of the end of the iron outlet trough base.

[0009] A sealing layer is provided between adjacent iron outlet trench bases.

[0010] The upper surface of the irregularly shaped connecting pin is provided with a handle.

[0011] The bolt is a wing bolt.

[0012] This utility model has the following advantages: After the adjacent iron discharge trench bases are placed accordingly, the irregularly shaped connecting pins are inserted into the two corresponding connecting half-grooves to limit and connect the adjacent iron discharge trench bases in the horizontal direction. Then, the bolts are passed through the two corresponding half-through holes and connected to the threaded holes on the irregularly shaped connecting pins to lock the position of the irregularly shaped connecting pins in the connecting half-grooves, thereby limiting the adjacent iron discharge trench bases in the vertical direction and further stabilizing the connection of the iron discharge trench bases. When the iron discharge trench is partially damaged, the bolts on the corresponding section of the iron discharge trench base are unscrewed in sequence, and then the irregularly shaped connecting pins are pulled out one by one to disassemble the damaged section of the iron discharge trench base for easy replacement. It is highly targeted, time-saving, labor-saving, and easy to use. Attached Figure Description

[0013] Figure 1 This is an isometric view of the present invention;

[0014] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0015] Figure 3 for Figure 1 A close-up view of the top view;

[0016] Figure 4 for Figure 3 Structural deformation diagram;

[0017] Figure 5for Figure 3 The structural deformation diagram. Detailed Implementation

[0018] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0019] like Figures 1 to 5 As shown, the present invention relates to a composite iron discharge trough. The inner side of the iron discharge trough base 10 is provided with a protective layer 11. Both ends of the iron discharge trough base 10 are provided with connecting half-grooves 12. A special-shaped connecting pin 13 is longitudinally inserted into the connecting half-grooves 12 to limit the adjacent iron discharge trough base 10 in the horizontal direction. The iron discharge trough base 10 is provided with a semi-through hole 14 communicating with the connecting half-grooves 12. The special-shaped connecting pin 13 is provided with a threaded hole 15 corresponding to the semi-through hole 14. A bolt 16 is movably inserted into the semi-through hole 14 to cooperate with the threaded hole 15 to limit the adjacent iron discharge trough base 10 in the vertical direction.

[0020] After the adjacent iron discharge trench bases 10 are placed accordingly, the irregular connecting pins 13 are inserted into the two corresponding connecting half-grooves 12 to limit and connect the adjacent iron discharge trench bases 10 in the horizontal direction. Then, the bolts 16 are passed through the two corresponding semi-through holes 14 and connected to the threaded holes 15 on the irregular connecting pins 13 to lock the position of the irregular connecting pins 13 in the connecting half-grooves 12, so as to limit the adjacent iron discharge trench bases 10 in the vertical direction and further stabilize the connection of the iron discharge trench bases 10. When the iron discharge trench is partially damaged, the bolts 16 on the corresponding section of the iron discharge trench base 10 are unscrewed in sequence, and then the irregular connecting pins 13 are pulled out one by one. The damaged section of the iron discharge trench base 10 can be disassembled for easy replacement. It is highly targeted, time-saving, labor-saving and convenient to use.

[0021] The protective layer 11 can be a multi-layered structure to form a composite structure with the molten iron trough substrate 10. For example, it may include an anti-corrosion layer in contact with the molten iron, an intermediate refractory layer, and a heat-resistant layer in contact with the molten iron trough substrate 10. The anti-corrosion layer can be made of dolomite-magnesium refractory cement to improve corrosion resistance, while also possessing good heat resistance and high-temperature resistance. The refractory layer can be made of high-alumina castable to improve refractory performance. The heat-resistant layer can be made of a mixture of quartz sand and inorganic additives to improve high-temperature resistance and temperature barrier effect. The thickness of the heat-resistant layer and the refractory layer ranges from 3-5 cm; the thickness of the anti-corrosion layer 9 ranges from 1-3 cm.

[0022] The irregularly shaped connecting pin 13 and the connecting half-groove 12 are shaped and fitted together, with a clearance fit or transition fit, making the connection between adjacent iron outlet groove bases 10 more stable and tighter. The lower end of the irregularly shaped connecting pin 13 has a chamfer, and the upper end of the connecting half-groove 12 has a corresponding chamfer, facilitating the insertion of the irregularly shaped connecting pin 13 into the connecting half-groove 12. Furthermore, the upper end of the irregularly shaped connecting pin 13 extends outwards to form a protrusion 17, which corresponds to the chamfer at the upper end of the connecting half-groove 12, ensuring that when the irregularly shaped connecting pin 13 is inserted into the connecting half-groove 12, the upper surface of the iron outlet groove base 10 is flush, resulting in a tighter connection.

[0023] Preferably, see Figure 3 , Figure 4 , Figure 5 The horizontal cross-sectional shape of the connecting half-groove 12 is dovetail-shaped, C-shaped, or T-shaped.

[0024] The horizontal cross-sectional shape of the connecting half-groove 12 has the following common characteristics: it has a smaller opening on the side near the end of the iron discharge trough base 10 and a larger opening on the part away from the end of the iron discharge trough base 10, so that when the irregular connecting pin 13 is inserted into the two corresponding connecting half-groove 12, the irregular connecting pin 13 can play a pulling and limiting role on the connecting half-groove 12 in the horizontal direction.

[0025] Correspondingly, the horizontal cross-sectional shape of the irregular connecting pin 13 is also a dovetail, C-shaped, or T-shaped shape that mates with the connecting half-groove 12. See details... Figure 3 The smaller opening of the dovetail-shaped connecting half-groove 12 faces the end of the iron outlet trough base 10; see also Figure 4 The arc corresponding to the C-shaped connecting half-groove 12 is the dominant arc, and the side of the opening faces the end of the iron outlet groove base 10; see also Figure 5 For the T-shaped connecting half-groove 12, it includes a groove body with two free ends arranged perpendicularly to each other, and a groove body with only one free end. The free end of the groove body with only one free end faces the end of the iron outlet groove base 10. Of course, the horizontal cross-sectional shape of the irregular connecting pin 13 and the connecting half-groove 12 is not limited to the above shapes.

[0026] Preferably, connecting half-grooves 12 are provided on both sides of the end of the iron outlet trough base 10.

[0027] Preferably, a sealing layer is provided between adjacent iron outlet trench bases 10, and the sealing layer is made of heat-resistant and high-temperature resistant material.

[0028] Preferably, the upper surface of the irregular connecting pin 13 is provided with a handle 18.

[0029] Preferably, the bolt 16 is a wing bolt.

[0030] The working principle of this utility model is as follows:

[0031] After the adjacent iron discharge trench bases 10 are placed accordingly, the two corresponding connecting half-grooves 12 form an integral groove and the two corresponding semi-through holes 14 form an integral hole. The irregular connecting pin 13 is inserted into the two corresponding connecting half-grooves 12. The irregular connecting pin 13 can play a pulling limit role on the connecting half-grooves 12 in the horizontal direction, so as to limit and connect the adjacent iron discharge trench bases 10 in the horizontal direction. Then, the bolt 16 is passed through the two corresponding semi-through holes 14 and connected to the threaded hole 15 on the irregular connecting pin 13 to lock the position of the irregular connecting pin 13 in the connecting half-grooves 12, so as to limit the adjacent iron discharge trench bases 10 in the vertical direction, and further stabilize the connection of the iron discharge trench bases 10.

[0032] When the iron discharge trough is partially damaged, the bolts 16 on the base 10 of the damaged section of the iron discharge trough are unscrewed one by one, and then the irregular connecting pins 13 are pulled out one by one. The base 10 of the damaged section of the iron discharge trough can be disassembled, which makes it easy to replace. It is highly targeted, saves time and effort, and is convenient to use.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A composite trough, characterized by, The inner side of the taphole base (10) is provided with a protective layer (11), the upper edge of both ends of the taphole base (10) is provided with a connecting half slot (12), the connecting half slot (12) is longitudinally movably inserted with a special connecting pin (13) matched with the connecting half slot (12), so as to limit the adjacent taphole base (10) in the horizontal direction; the taphole base (10) is provided with a half through hole (14) communicated with the connecting half slot (12), the special connecting pin (13) is provided with a threaded hole (15) corresponding to the half through hole (14), and the half through hole (14) is movably inserted with a bolt (16) matched with the threaded hole (15), so as to limit the adjacent taphole base (10) in the vertical direction.

2. The composite trough according to claim 1, characterized in that The horizontal section shape of the connecting half slot (12) is swallowtail shape, C shape or T shape.

3. The composite trough according to claim 1, wherein The two sides of the end of the taphole base (10) are correspondingly provided with the connecting half slot (12).

4. The composite trough according to claim 1, wherein The adjacent taphole bases (10) are provided with a sealing layer.

5. The composite trough according to claim 1, wherein The upper surface of the special connecting pin (13) is provided with a handle (18).

6. The composite trough according to claim 1, wherein The bolt (16) is a butterfly bolt.

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