ladle

Abstract

The utility model provides a ladle, and a pair of shaft core common horizontal line's trunnion is equipped with in the ladle body surface near the open mouth, and the ladle body outer package wall lower part of the opposite side of pouring opening is provided with the connecting orifice convenient to hook, and the ladle body outer package wall on the side of trunnion is provided with counterweight, and the total center of mass of counterweight and ladle body is located or adjacent to the plumb surface of the shaft core of trunnion. The utility model mainly utilizes counterweight to adjust the total center of mass of the whole ladle, makes this total center of mass as far as possible to be located on the median line of two trunnion connecting lines, reduces the shaking generated in the process of ladle hoisting, and avoids the risk of slag liquid overflow and ladle overturning.

Description

Technical Field

[0001] This utility model relates to the field of non-ferrous metal smelting technology, specifically to a slag bag. Background Technology

[0002] In the non-ferrous metal smelting process, a large amount of high-temperature molten slag is generated. Current technology typically uses slag ladles for containment, transportation, and handling. A slag ladle is a large container cast from special heat-resistant steel, equipped with trunnions for easy crane lifting. During lifting, two slings on the crane are suspended from a pair of trunnions on the slag ladle. These two lifting points form a statically determinate structure, meaning the center of gravity of the slag ladle and the slag within its cavity is approximately located on the perpendicular bisector of the line connecting the two trunnions, and this center of gravity is lower than the trunnion shaft. This structure allows the slag ladle to maintain balance during lifting. However, due to the asymmetrical cross-sectional shape of the slag ladle perpendicular to the trunnion shaft, coupled with precision errors during casting, there will always be a gap between the center of gravity of the slag ladle and the molten slag and the perpendicular bisector of the line connecting the two trunnions. Furthermore, the molten slag within the cavity of the slag ladle will slosh during lifting, causing its surface to fluctuate. All these factors contribute to the risk of slag overflow or even ladle tipping over during lifting, endangering production safety. Utility Model Content

[0003] The purpose of this invention is to provide a slag bag that improves the stability of the bag itself during hoisting and ensures production safety.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a slag bag, including a bag body with an open top, a pair of trunnions with the same horizontal axis are provided on the surface of the bag body near the open top, the bag body is mirror-symmetrical about a vertical plane that passes through the center of the line connecting the trunnions' axis lines and is perpendicular to the line connecting the trunnions' axis lines, a pouring port is provided on the edge of the bag body located on the side of the line connecting the trunnions' axis lines, a connecting hole for easy hooking is provided on the lower part of the outer bag wall on the opposite side of the pouring port, a counterweight is provided on the outer bag wall on the side where the trunnions are located, and the total center of mass of the counterweight and the bag body is located on or near the vertical surface where the trunnions' axis lines are located.

[0005] The main feature of this invention is to set a counterweight on the outer wall of the slag bag, and use the counterweight to adjust the overall center of gravity of the slag bag so that the center of gravity is located as close as possible to the vertical line connecting the two trunnions, so as to reduce the shaking generated during the hoisting of the slag bag and avoid the risk of slag overflow and slag bag tipping over. Attached Figure Description

[0006] Figure 1 This is an isometric view of the slag bag;

[0007] Figure 2 , 4 These are the front view and top view of the slag package, respectively.

[0008] Figure 3 for Figure 2 Cross-sectional view at point AA. Detailed Implementation

[0009] like Figures 1-4 The slag bag shown includes a bag body 10 with an open top. A pair of trunnions 20 with the same horizontal axis are provided on the surface of the bag body 10 near the open top 11. The bag body 10 is mirror-symmetrical to a vertical plane that passes through the center of the axis line connecting the trunnions 20 and is perpendicular to the axis line connecting the trunnions 20. A pouring port 12 is provided on the edge of the bag body 10 on one side of the axis line connecting the trunnions 20. A connecting hole 131 for easy hooking is provided on the lower part of the outer wall of the bag body 10 on the opposite side of the pouring port 12. A counterweight 30 is provided on the outer wall of the bag body 10 on the side where the trunnions 20 are located. The total center of mass of the counterweight 30 and the bag body 10 is located on or near the vertical surface where the axis of the trunnions 20 is located.

[0010] In the above scheme, the package 10 is in the posture of being lifted by a crane or other lifting equipment, such as... Figure 2 The illustrated embodiment shows the slag bag in a vertically upward-facing position with its opening 11 facing upwards during hoisting. The bag body 10 is mirror-symmetrical about a vertical plane that passes through the center of the line connecting the trunnions 20 and is perpendicular to that line. Figure 3 As shown, this ensures that the force on the two trunnions 20 is consistent, preventing the slings from breaking due to uneven load distribution at the two lifting points. For example... Figure 2 , 3 In the illustrated embodiment, the bottom of the cavity of the slag bag 10 is a hemispherical surface, with the center of the hemisphere located below the trunnion 20 shaft. This center and the center of the counterweight 30 are located on opposite sides of the plumb line where the trunnion 20 shaft is located. When the slag bag 10 is filled with high-temperature molten slag, the center of gravity of the counterweight 30 and the slag bag 10 are also located on opposite sides of the plumb line where the trunnion 20 shaft is located. This design ensures that the overall center of gravity of the counterweight 30 and the slag bag 10 is located on or near the plumb line where the trunnion 20 shaft is located. The purpose of setting the counterweight 30 is to adjust the overall center of gravity of the slag bag to be as close as possible to the plumb line where the trunnion 20 shaft is located, thereby improving the stability of the slag bag during hoisting, reducing swaying during hoisting, and avoiding the risk of slag overflow and slag bag tipping.

[0011] like Figure 2As shown, the projection of the slag bag perpendicular to the trunnion 20 axis reveals that the left and right sides of the bag body 10 are not symmetrical relative to the trunnion 20. Furthermore, due to precision errors in the casting of the slag bag, it is difficult to guarantee that its center of gravity is located on the plumb plane where the trunnion 20 axis is located immediately after casting. The casting mold for the slag bag is costly and complex, making it difficult and costly to adjust the center of gravity position after casting by modifying the mold. Therefore, a better approach is to pre-lift the slag bag at both trunnions 20, observe the posture of the bag body 10 to determine its overall center of gravity position, and add weights 30 to the outer wall of the bag body 10 as needed to fine-tune the overall center of gravity position. This avoids directly modifying the mold and has significant application value.

[0012] like Figure 2 , 3 In the illustrated embodiment, the center of gravity of the counterweight 30 and the sprue 12 are both located on the same side of the plumb plane where the trunnion 20 shaft core is located, while the center of gravity of the package 10 and the sprue 12 are located on opposite sides of the plumb plane where the trunnion 20 shaft core is located. When the lifting device hooks the trunnion 20, the position of the counterweight 30 avoids the steel chain of the sling, thus not affecting the normal lifting process.

[0013] To facilitate the installation of the counterweight 30, the counterweight 30 is plate-shaped and is respectively positioned above the two trunnions 20, with the plate surface of the counterweight 30 extending parallel to the axial length direction of the trunnions 20. This positioning of the counterweight 30 also prevents it from directly contacting the high-temperature molten slag inside the ladle body 10.

[0014] Preferably, the counterweight 30 is floating or detachably mounted on the outer wall of the bag body 10, so that the position or weight of the counterweight 30 can be adjusted according to the weight change of the slag bag, so as to ensure that the center of mass of the slag bag is as close as possible to the plumb surface where the trunnion 20 shaft core is located.

[0015] A more specific solution involves a lug plate 21 at the end of the trunnion 20 to limit the position of the sling hook, and an arc-shaped transition section 22 at the junction of the lug plate 21 and the bottom of the trunnion 20. In this solution, the lug plate 21 prevents the lifting hook from detaching from the trunnion 20. Furthermore, if the lifting hook fails to engage with the lifting point of the trunnion 20, it may detach during lifting, causing the slag bag to tilt or even fall off, endangering production safety. The arc-shaped transition section 22 at the junction of the lug plate 21 and the bottom of the trunnion 20 guides the hook's engagement position. If the hook is mistakenly engaged on the edge of the trunnion 20's end face, the transition section 22 allows the hook to slide to the middle section of the trunnion 20, avoiding the aforementioned danger.

[0016] To increase the load-bearing strength of the trunnion 20, a reinforcing rib 23 extending in the diameter direction of the cross section of the trunnion 20 is provided at the connection between the outer wall of the casing 10 and the trunnion 20.

[0017] More specifically, the bottom of the outer wall of the slag bag 10 is provided with a stiffening plate 13, the surface of which is perpendicular to the axis of the trunnion 20. The surface of the stiffening plate 13 is adjacent to or passes through the midpoint of the line connecting the axis of the trunnion 20. The connecting hole 131 is located on the surface of the stiffening plate 13 away from the pouring port 12. Above the connecting hole 131, the outer wall of the slag bag 10 is provided with a limiting plate 14 for restraining the lifting cable. The limiting plate 14 is arranged near the opening 11 and is horizontal. The plate surface is provided with a constricted through hole 141 that communicates with the plate edge away from the opening 11. When the slag bag is dumped, the steel chain of the lifting hook hooked on the connecting hole 131 passes through the constricted through hole 141. The constricted through hole 141 can restrain the position of the hook chain to ensure that it avoids the lifting cable or other components hooked on the trunnion 20.

[0018] Preferably, there are two connecting holes 131, and the line connecting the two connecting holes 131 forms an angle with the horizontal plane, with the lower connecting hole 131 being closer to the plumb surface where the trunnion 20 shaft core is located. When the angle at which the slag bag needs to be tilted is small, the lifting hook is hooked on the higher connecting hole 131, and vice versa.

Claims

1. A slag bag, comprising a bag body (10) with an open top, wherein a pair of trunnions (20) with common horizontal axis are provided on the surface of the bag body (10) near the open top (11), the bag body (10) is mirror-symmetrical to a vertical plane passing through the center of the axis line connecting the trunnions (20) and perpendicular to the axis line connecting the trunnions (20), a pouring port (12) is provided on the edge of the bag body (10) on one side of the axis line connecting the trunnions (20), and a connecting hole (131) for easy hooking is provided on the lower part of the outer wall of the bag body (10) opposite to the pouring port (12), characterized in that: A counterweight (30) is provided on the outer wall of the package (10) on the side where the trunnion (20) is located. The total center of mass of the counterweight (30) and the package (10) is located on or near the plumb surface where the trunnion (20) axis is located.

2. The slag bag according to claim 1, characterized in that: The center of gravity of the counterweight (30) and the sprue (12) are both on the same side of the plumb surface where the trunnion (20) core is located, while the center of gravity of the package (10) and the sprue (12) are on opposite sides of the plumb surface where the trunnion (20) core is located.

3. The slag bag according to claim 1 or 2, characterized in that: The counterweight (30) is plate-shaped and is respectively positioned above the two trunnions (20). The plate surface of the counterweight (30) extends in a direction parallel to the axial length of the trunnion (20).

4. The slag bag according to claim 1 or 2, characterized in that: The counterweight (30) is either floating or detachably mounted on the outer wall of the package (10).

5. The slag bag according to claim 1, characterized in that: The trunnion (20) has an ear plate (21) at the shaft end for limiting the hook of the sling, and an arc transition section (22) is provided at the connection between the ear plate (21) and the bottom of the shaft end of the trunnion (20).

6. The slag bag according to claim 1, characterized in that: The outer wall of the package (10) is provided with a reinforcing rib (23) extending in the diameter direction of the cross section of the trunnion (20) at the connection between the trunnion (20) and the outer wall of the package (10).

7. The slag bag according to claim 1, characterized in that: The bottom of the outer wall of the package (10) is provided with a stiffening plate (13) with its plate surface perpendicular to the core of the trunnion (20). The plate surface of the stiffening plate (13) is adjacent to or passes through the midpoint of the line connecting the core of the trunnion (20). The connecting hole (131) is set on the plate surface of the stiffening plate (13) away from the pouring port (12). The outer wall of the package (10) above the connecting hole (131) is provided with a limiting plate (14) for restraining the sling. The limiting plate (14) is arranged adjacent to the opening (11) and its plate surface is horizontal. The plate surface is provided with a constricted through hole (141) that communicates with the plate edge away from the opening (11).

8. The slag bag according to claim 7, characterized in that: There are two connecting holes (131). The line connecting the two connecting holes (131) forms an angle with the horizontal plane, and the lower connecting hole (131) is closer to the plumb surface where the trunnion (20) shaft core is located.

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