Combined water-flushed slag channel

Abstract

The application relates to a combined water-flushing slag groove, belonging to the field of steel casting, which comprises a groove bottom and two groove sidewalls, the two groove sidewalls are respectively arranged at the top of the two sides of the extension direction of the groove bottom, the inner wall of the groove bottom is arc-shaped, the inner wall of the groove sidewall near one end of the groove bottom is arc-shaped, and the groove bottom and the two groove sidewalls are smoothly connected to form a U-shaped groove. The application has the effects of simply and quickly replacing the worn parts and improving the utilization rate of the unworn parts.

Description

Technical Field

[0001] This application relates to the field of steel casting technology, and in particular to a combined water-flushing slag trench. Background Technology

[0002] Water-quenched slag trenches are key facilities for handling molten slag during blast furnace ironmaking. They are primarily used for the water quenching of molten slag, achieving rapid cooling and solidification through contact between water and the high-temperature molten slag. Their main structure is typically made of concrete or steel, with an overall rectangular trench shape and an internal wear-resistant lining to withstand the harsh environment of molten slag handling. Due to direct contact with high-temperature molten slag, the thermal shock of the water quenching process, and the scouring effect of slag particles, the trenches must possess three core characteristics: high temperature resistance, corrosion resistance, and impact resistance.

[0003] However, existing cast iron slag flushing channels mainly adopt an integrated rectangular structure. After long-term use and wear, the wear-resistant lining is difficult to replace and repair, which takes a long time. The replacement and repair time affects normal production. Furthermore, partial damage requires the replacement of the entire channel, and wear at the bottom of the channel along with the sidewalls also requires replacement, resulting in the unused parts being unusable and causing waste of the cast iron channel.

[0004] Existing split-type trench structures, such as the inner lining plate disclosed in CN204589215U and the slag flushing trench, iron oxide scale flushing trench and dust removal water flow channel including the inner lining plate, have sharp edges at the connection between the inner side and the bottom of the trench. The water flow forms eddies due to the difference in flow velocity at this point. Due to the water flow scouring and the concentrated abrasive force, the connection of the trench is prone to local wear. Once worn, its sidewalls and bottom must be replaced, which still results in the waste of cast iron channels and easy wear. Utility Model Content

[0005] In order to achieve simple and quick replacement of worn parts and improve the utilization rate of unworn parts, this application provides a combined water-flushing slag trench.

[0006] This application provides a combined water-flushing slag trench. The technical solution adopted is as follows: A combined water-flushing slag trench includes a trench bottom and two trench sidewalls. The two trench sidewalls are located at the top of both sides of the trench bottom extending in the direction of extension. The inner wall of the trench bottom is arc-shaped, and the inner wall of the trench sidewalls near the end of the trench bottom is arc-shaped. The trench bottom and the two trench sidewalls are smoothly connected to form a U-shaped trench.

[0007] By adopting the above technical solution, the water-flushing slag trench is composed of a split structure. During installation, the bottom of the trench can be installed first. After positioning and placing it, the sidewalls of the trench are then fitted and fixed to the bottom of the trench through sealed splicing gaps. The bottom of the trench and the sidewalls of the trench are smoothly connected, and the water-flushing slag flows naturally. The bottom of the trench is the part that is prone to wear, while the sidewalls of the trench are not easily damaged. When the bottom of the trench wears out after long-term use, only the corresponding part of the bottom of the trench needs to be replaced. The sidewalls of the trench can be recycled. The U-shaped trench formed by the bottom of the trench and the sidewalls of the trench makes the structure more evenly stressed, avoids stress concentration that causes trench cracks, and prevents dead corners from accumulating sediment. The slag-water mixture in the U-shaped trench can flow by gravity and inertia, reducing resistance and promoting stable water flow.

[0008] Optionally, a positioning groove is provided on the inclined surface of the bottom of the trench that contacts the sidewall of the trench, and a positioning protrusion is provided on the bottom surface of the sidewall of the trench that contacts the bottom of the trench. The positioning protrusion is located in the positioning groove, and the positioning groove is used to fix the sidewall of the trench.

[0009] By adopting the above technical solution, the positioning protrusions on the sidewall of the trench are inserted into the positioning groove at the bottom of the trench, achieving a stable installation and preventing the trench from being impacted by water flow, thus avoiding the displacement of the bottom of the trench from the sidewall of the trench and improving the stability of installation and use.

[0010] Optionally, the outer side of the bottom of the trench has a chamfered structure, and the extension direction of the chamfered edge at the bottom of the trench is consistent with the extension direction of the bottom of the trench.

[0011] By adopting the above technical solution, the force between the bottom of the trench and the sidewall of the trench is distributed to the chamfered surface, reducing the impact and avoiding the concentration of force at the corners of the traditional cuboid trench, which would lead to cracks or splits at the bottom of the trench.

[0012] Optionally, the minimum distance from the chamfered edge at the bottom of the trench to the inner wall at the bottom of the trench is greater than or equal to the minimum distance from the horizontal bottom surface of the trench to the inner wall at the bottom of the trench.

[0013] By adopting the above technical solution, the bottom of the trench extends outward along the chamfered part, forming a more stable and gentle transition, avoiding the eddy currents on the side of the slag flushing water from causing wear on the bottom edge of the trench, and preventing the side from being worn first and affecting normal use.

[0014] Optionally, the angle between the outer vertical surface of the trench sidewall and the inclined surface near the bottom of the trench is 40 to 50°.

[0015] By adopting the above technical solution, we can avoid the occurrence of excessively large included angles, which would cause the bottom of the trench sidewall to wear inward and tilt. At the same time, we can also prevent the included angles from being too small, which would result in a thinner trench sidewall that is insufficient to resist the wear of water-flushed slag. An included angle of 40 to 50 degrees enhances the stability and fixation for later use.

[0016] Optionally, a threaded steel bar is pre-installed at the bottom of the groove, and the threaded steel bar is located at the bottom of the groove away from the inner arc surface.

[0017] By adopting the above technical solution, the wear condition of the groove bottom of the rebar can be intuitively predicted, and the groove bottom can be replaced in a timely manner according to the wear condition.

[0018] Optionally, the rebar has a cross-shaped structure.

[0019] By adopting the above technical solution, if the transverse threaded steel bars can be observed at the bottom of the groove during use, it indicates that this section of the bottom of the groove needs to be replaced. If no threaded steel bars are observed, it indicates that the wear at the bottom of the groove will not affect normal operation.

[0020] Optionally, the end of the trench sidewall away from the bottom of the trench is provided with a lifting lug, which is used for installation and hoisting.

[0021] By adopting the above technical solution, the crane can directly pass through the installation lugs during installation and disassembly, achieving quick and convenient installation and disassembly without affecting normal operations.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The water-flushing slag trench is composed of a split structure. During installation, the bottom of the trench can be installed first. After positioning, the sidewalls of the trench are then fitted and fixed to the bottom of the trench through sealed joints. The bottom and sidewalls of the trench are smoothly connected, allowing the water-flushing slag to flow naturally. The bottom of the trench is the most vulnerable part, while the sidewalls are not. When the bottom of the trench wears out after long-term use, only the corresponding part of the bottom needs to be replaced. The sidewalls of the trench can be recycled. The U-shaped trench formed by the bottom and sidewalls of the trench makes the structure more evenly stressed, avoiding stress concentration that could cause trench cracks. It also prevents dead corners from accumulating sediment. The slag-water mixture in the U-shaped trench can flow by gravity, reducing resistance and promoting stable water flow.

[0023] 2. The positioning protrusions on the sidewall of the trench are inserted into the positioning groove at the bottom of the trench to achieve a stable installation, prevent the trench from being impacted by water flow, and avoid the bottom of the trench from shifting off from the sidewall of the trench, thus improving the stability of installation and use.

[0024] 3. The bottom of the trench extends outward along the chamfered section, forming a more stable and gentle transition. This prevents the eddy currents from the water-flushing slag from causing wear on the bottom edge of the trench, thus avoiding wear on the edges first and affecting normal use. It also avoids an excessively large angle, which could cause the bottom of the trench sidewall to wear inward and tilt. At the same time, it prevents an excessively small angle, which would result in a thinner trench sidewall that is insufficient to resist the wear of the water-flushing slag. An angle of 40-50° enhances stability and fixation for later use.

[0025] 4. The wear condition of the groove bottom can be visually predicted by the rebar, and the groove bottom can be replaced in time according to the wear condition. When the rebar is visible horizontally at the bottom of the groove during use, it means that this section of the groove bottom needs to be replaced. If the rebar is not visible, it means that the wear condition at the bottom of the groove will not affect normal operation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0027] Figure 2 This is a cross-sectional schematic diagram illustrating the rebar in the embodiments of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Bottom of the trench; 11. Positioning groove; 2. Side wall of the trench; 21. Positioning protrusion; 3. Threaded steel bar; 4. Lifting lug. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0030] This application discloses a combined water-flushing slag trench.

[0031] like Figure 1 and Figure 2 The combined water-flushing slag trench includes a trench bottom 1, the top surface of which is an arc-shaped groove, and the bottom surface of which is a horizontal bottom surface. A threaded steel bar 3 is pre-embedded in the trench bottom 1, positioned close to the bottom surface of the trench bottom 1. The threaded steel bar 3 has a cross-shaped structure, with the horizontal threaded steel bar 3 extending along the direction of the trench bottom 1 and the vertical threaded steel bar 3 aligned with the flow direction of the water-flushing slag. The bottom surface of the trench bottom 1 has chamfered sides, and the minimum distance from the two chamfered surfaces to the arc-shaped groove of the trench bottom 1 is greater than the minimum distance from the bottom surface of the trench bottom 1 to the arc-shaped groove. The two inclined surfaces on the top surface of the trench bottom 1 are aligned with the direction of the trench bottom 1's extension, and the angle between the inclined surfaces and the vertical direction is 45°. Positioning grooves 11 are provided on the top inclined surfaces on both sides of the trench bottom 1. The positioning grooves 11 have a cuboid structure, and their extension direction is perpendicular to the flow direction of the water-flushing slag. The positioning grooves 11 penetrate the inclined surfaces of the trench bottom 1. On the sloping surfaces at the top of both sides of the bottom of the trench 1, there are two trench sidewalls 2 of equal size. The contact surface between the trench sidewall 2 and the bottom of the trench 1 forms an angle of 45° with the vertical direction. The bottom of the trench sidewall 2 is provided with a positioning protrusion 21, which is a cuboid structure. The extension direction of the positioning protrusion 21 is consistent with the extension direction of the positioning groove 11. The positioning protrusion 21 is located inside the positioning groove 11. The positioning protrusion 21 corresponds to the positioning groove 11 one by one. The inner wall of the trench sidewall 2 near the bottom of the trench 1 is arc-shaped. The inner wall of the trench sidewall 2 away from the bottom of the trench 1 is vertical. The outer wall of the trench sidewall 2 is vertical. The bottom of the trench 1 and the two trench sidewalls 2 together form a U-shaped channel. The top of the trench sidewall 2 is provided with a lifting lug 4, which corresponds to the trench sidewall 2 one by one.

[0032] In other embodiments, the threaded steel 3 structure can also be a shaped structure or other structures, the angle between the inclined surface of the bottom 1 of the trench and the vertical direction can also be any angle of 40 to 50°, the positioning groove 11 can also be a cylindrical groove or other structures, the angle between the contact surface of the trench sidewall 2 and the bottom 1 of the trench and the vertical direction can also be any angle of 40 to 50°, the positioning protrusion 21 can also be a cylinder or other structures, and two, three or other numbers of mounting lugs 4 can also be provided at the top of the trench sidewall 2.

[0033] The implementation principle of this application embodiment is as follows: The water flushing slag trench is composed of a split structure. During installation, the bottom 1 of the trench can be installed first. After positioning and placing it, the sidewall 2 of the trench is attached and fixed to the bottom 1 of the trench through the sealed splicing gap. The bottom 1 of the trench is the part that is prone to wear, while the sidewall 2 of the trench is the part that is not prone to wear. When the bottom 1 of the trench is worn after long-term use, only the corresponding part of the bottom 1 of the trench needs to be replaced. The sidewall 2 of the trench can be recycled. The U-shaped trench formed by the bottom 1 of the trench and the sidewall 2 of the trench makes the structure more uniformly stressed, avoids stress concentration, and avoids trench cracks. There are no dead corners for sediment accumulation. The slag-water mixture in the U-shaped trench can flow by gravity, reducing resistance and facilitating stable water flow.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A combined water-flushing slag trench, characterized in that: It includes a trench bottom (1) and two trench sidewalls (2). The two trench sidewalls (2) are located on the top of both sides of the trench bottom (1) in the extension direction. The inner wall of the trench bottom (1) is arc-shaped. The inner wall of the trench sidewall (2) near the end of the trench bottom (1) is arc-shaped. The trench bottom (1) and the two trench sidewalls (2) are smoothly connected to form a U-shaped trench.

2. The combined water-flushing slag trench according to claim 1, characterized in that: A positioning groove (11) is provided on the inclined surface of the bottom (1) of the groove that contacts the sidewall (2) of the groove. A positioning protrusion (21) is provided on the bottom surface of the sidewall (2) of the groove that contacts the bottom (1) of the groove. The positioning protrusion (21) is located in the positioning groove (11). The positioning groove (11) is used to fix the sidewall (2) of the groove.

3. The combined water-flushing slag trench according to claim 1, characterized in that: The outer side of the bottom (1) of the groove is chamfered, and the extension direction of the chamfered edge of the bottom (1) of the groove is consistent with the extension direction of the bottom (1) of the groove.

4. The combined water-flushing slag trench according to claim 3, characterized in that: The minimum distance from the chamfered edge of the bottom (1) of the groove to the inner wall of the bottom (1) of the groove is greater than or equal to the minimum distance from the horizontal bottom surface of the bottom (1) of the groove to the inner wall of the bottom (1) of the groove.

5. The combined water-flushing slag trench according to claim 1, characterized in that: The angle between the external vertical surface of the trench sidewall (2) and the inclined surface near the bottom (1) of the trench is 40-50°.

6. The combined water-flushing slag trench according to claim 1, characterized in that: A threaded steel bar (3) is pre-installed in the bottom (1) of the groove, and the threaded steel bar (3) is located at the bottom (1) of the groove away from the inner arc surface.

7. The combined water-flushing slag trench according to claim 6, characterized in that: The rebar (3) has a cross-shaped structure.

8. The combined water-flushing slag trench according to claim 1, characterized in that: The end of the trench sidewall (2) away from the bottom (1) of the trench is provided with a lifting lug (4), which is used for installation and hoisting.

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