A ladle tilting device for casting crane

Abstract

The present invention belongs to the technical field of crane lifting, and provides a ladle tipping device for a casting crane, including a lifting assembly and a hook body, wherein the upper part of the lifting assembly is connected to the auxiliary lifting mechanism, and the lower part is hinged to the hook body. The lifting assembly includes a plurality of lifting segments, and adjacent lifting segments are hinged so that each lifting segment can swing. The hook body includes a connecting portion and a hook head; one end of the connecting portion is hinged to the corresponding lifting segment, and the other end is provided with a hook head, and the connecting portion extends to one side of the lifting assembly, and when the ladle is not mounted, the hook head is located on one side of the central axis of the lifting assembly; when the ladle is mounted, the connecting portion rotates relative to the lifting assembly around the hinge point so that the hook head is located on the central axis of the lifting assembly. The ladle tipping device of the present invention is safe and flexible, and the crane operator can independently complete the hooking and unhooking operations.

Description

Technical Field

[0001] The invention belongs to the technical field of crane hoisting, and in particular relates to a ladle tilting device for a casting crane. Background Art

[0002] The main function of a crane is to lift and transport goods, which places extremely high demands on work safety. The lifting safety of a foundry crane is of utmost importance. Almost every foundry crane lifting accident will result in serious equipment losses and casualties. In the steelmaking process, the fixed gantry hook of the main lifting mechanism of a foundry crane is usually required to lift the ladle, and the molten iron in the ladle is poured into an electric furnace or converter for smelting through the ladle tipping device. In the process of tipping the ladle, improper use of the tipping device will greatly increase the accident rate.

[0003] Under the premise of ensuring safety during the process of lifting and tipping the ladle, it is also necessary to ensure the flexibility of the ladle tipping (without affecting production efficiency) and the molten iron loss rate (reducing the residual molten iron in the ladle). The usual lifting and tipping method is to install a tipping lug under the ladle, and the foundry crane uses the fixed gantry hook of the main lifting mechanism to lift the molten iron, and use the auxiliary lifting mechanism directly or equip the ladle tipping device to perform the ladle tipping operation.

[0004] Considering the distance between the hooks of the main and auxiliary lifting mechanisms of the casting crane and the size of the ladle, it is a safer and more effective choice to equip the hook of the auxiliary lifting mechanism with a ladle tipping device to perform the ladle tipping operation. The existing ladle tipping device includes a wire rope and a hook body installed at the lower part of the wire rope, and the upper part of the wire rope is connected to the auxiliary lifting mechanism. The existing hook body includes a vertically arranged connection part and a hook head fixed below the connection part. When the ladle is not mounted, the center of gravity of the hook head is located on the central axis of the wire rope; when tipping, the center of gravity of the hook head deviates from the central axis of the wire rope.

[0005] The ladle tipping device has the following problems: 1. When tipping, the hook head deviates from the center line of the wire rope, which may cause accidental unhooking; 2. It requires the cooperation of multiple operators to complete the hooking and unhooking operations of the unhooking body. Frequent manual operations are not only dangerous, but also affect the production rhythm; 3. The safety and stability of lifting molten metal with wire rope are poor, the wire rope wears out quickly, is easy to break, and needs to be replaced frequently; 4. Interference and collision may occur during the hooking and unhooking process; 5. The hook head position of the hook body is easy to wear, and usually the entire hook body needs to be replaced due to damage to the hook head, resulting in a waste of resources.

[0006] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0007] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a ladle tipping device for a casting crane.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A ladle tipping device for a casting crane comprises a lifting assembly and a hook body, wherein the upper portion of the lifting assembly is connected to a secondary lifting mechanism, and the lower portion is hinged to the hook body;

[0010] The lifting assembly comprises a plurality of lifting segments, and adjacent lifting segments are hinged so that each of the lifting segments can swing;

[0011] The hook body comprises a connecting portion and a hook head; one end of the connecting portion is hinged to the corresponding lifting section, and the hook head is arranged at the other end, and the connecting portion extends to one side of the lifting assembly;

[0012] When the ladle is not mounted, the hook head is located on one side of the central axis of the lifting assembly; when the ladle is mounted, the connecting part rotates around the hinge point relative to the lifting assembly so that the hook head is located on the central axis of the lifting assembly.

[0013] Preferably, the total length of the lifting assembly exceeds the distance between the tipping lug of the ladle and the upper edge of the ladle.

[0014] Preferably, adjacent lifting sections and the connecting part and the corresponding lifting section are connected by a pin shaft; each lifting section includes two lifting plates arranged at intervals, and each lifting plate has a first circular hole for inserting the pin shaft at both upper and lower ends, and a second circular hole for inserting the pin shaft corresponding to the corresponding first circular hole is formed on the connecting part; the upper end of the connecting part extends to the interior of the corresponding lifting section.

[0015] Preferably, the hook head is arc-shaped, the line between the center of the hook head and the center of the second circular hole is the first line, and the line between the center of gravity of the hook body and the center of the second circular hole is the second line; the angle between the first line and the second line is θ, 30°≤θ≤60°; when the ladle is not mounted, the second line is collinear with the central axis of the lifting assembly; when the ladle is mounted, the first line is collinear with the central axis of the lifting assembly.

[0016] Preferably, the connecting portion is an L-shaped connecting portion, the short side of the L-shaped connecting portion is hinged to the lifting assembly, and the long side is fixedly connected to the hook head.

[0017] Preferably, a counterweight is provided on the outer side of the corner of the L-shaped connecting portion, and by selecting the counterweight of different weights, the distance that the center of gravity of the hook head deviates from the central axis of the lifting assembly when the ladle is not mounted can be adjusted.

[0018] Preferably, arc-shaped transition portions are provided on the inner side and the outer side of the corners of the L-shaped connecting portion.

[0019] Preferably, a wear-resistant protective plate is fixedly provided on the inner side of the hook head.

[0020] Preferably, the wear-resistant protective plate is a manganese steel plate or a chromium carbide composite steel plate.

[0021] Preferably, the wear-resistant protective plate has a thickness of 10 mm.

[0022] Beneficial effects:

[0023] On the one hand, the lifting assembly of the ladle tipping device of the present invention adopts a multi-stage structure, which increases its flexibility, facilitates the adjustment of the total length, and can prevent the hook body from interfering and colliding during the hooking and unhooking process. On the other hand, when the ladle is not mounted, the hook head is located on one side of the central axis of the lifting assembly, that is, the center of gravity of the hook head of the hook body is offset; when the ladle is mounted, the center of gravity of the hook head is located on the central axis of the lifting assembly, which can avoid accidental unhooking. In summary, the ladle tipping device of the present invention is safe and flexible, and the crane operator can independently complete the hooking and unhooking operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0025] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention when the molten iron ladle is not mounted;

[0026] Figure 2 is a cross-sectional view of Example 1 of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of Example 2 of the present invention when the molten iron ladle is not mounted;

[0028] Figure 4 This is a diagram showing the usage status of Example 2 of the present invention during the bag turning process.

[0029] The names corresponding to the various reference numerals in the figure are: 1. lifting section; 2. hook body; 3. pin shaft; 4. spacer sleeve; 21. connecting part; 22. hook head; 23. counterweight. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0031] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0033] The present invention provides a ladle tipping device applicable to a casting crane, and can design the total length of the tipping device, the width, length and flipping angle of the hook body 2 according to the main and auxiliary hook spacings, ladle heights, and ladle hook sizes and widths of different casting cranes. Figure 1 , 3 They are two finished products of ladle tipping devices designed according to the 32T auxiliary hook of the on-site casting crane and the size of the ladle. The difference lies in the different sizes of the hook body 2, which is suitable for different main and auxiliary hook spacings.

[0034] like Figure 1-4 As shown: a ladle tipping device for a casting crane, comprising a lifting assembly and a hook body 2, wherein the upper portion of the lifting assembly is connected to the auxiliary lifting mechanism, and the lower portion is hinged to the hook body 2;

[0035] The lifting assembly is a multi-section structure, which includes a plurality of lifting sections 1, and adjacent lifting sections 1 are hinged so that each lifting section 1 can swing;

[0036] The hook body 2 includes a connecting portion 21 and a hook head 22; one end of the connecting portion 21 is hinged to the corresponding lifting section 1, and the other end is provided with the hook head 22; the connecting portion 21 extends to one side of the lifting assembly; when the ladle is not mounted, the hook head 22 is located on one side of the central axis of the lifting assembly, that is, the center of gravity of the hook head 22 deviates from the central axis of the lifting assembly; when the ladle is mounted, the connecting portion 21 rotates relative to the lifting assembly around the hinge point so that the hook head 22 is located on the central axis of the lifting assembly, and no unhooking phenomenon occurs.

[0037] The total width and thickness of the hook head 22 can be determined according to the width of the ear shaft of the ladle and the weight of the ladle to meet the requirements of on-site use. The connection part 21 of the hook body 2 used by our company is riveted with 5*30mm steel plate, and the height of the connection part 21 in the lifting state is 150mm.

[0038] The total length of the lifting assembly exceeds the distance between the tipping lug of the molten iron ladle and the upper edge of the molten iron ladle, and the lifting assembly is a multi-stage structure. This design can prevent the hook assembly of the auxiliary lifting mechanism from colliding with the molten iron ladle or the molten iron temperature from burning the hook assembly wire rope when the hook assembly falls, and can also realize automatic hooking and unhooking through the movement of the main and auxiliary hook trolleys or the forward and backward swinging of the hook head 22 of the molten iron ladle tipping device, and has a wide range of applications.

[0039] In Example 1 and Example 2, the lifting assembly is a three-stage structure, that is, it includes three lifting sections 1. When in use, the distance between the main and auxiliary lifting mechanism hooks is usually fixed and cannot be adjusted. The lifting assembly adopts a three-stage structure, which can fully meet the swing flexibility of the tipping device, and has a small number of mechanical structures, reducing mechanical wear and failure parts. Therefore, the tipping hook device is suitable for use in the tipping operation of the double-beam single-trolley metallurgical casting crane during the ladle tipping operation.

[0040] In other embodiments, the lifting assembly may also be a two-section structure, a four-section structure, or a five-section structure.

[0041] In Example 1 and Example 2, the lifting section 1 adopts a hollow structure, which includes a lifting plate, a pin 3 and a spacer sleeve 4. Specifically, adjacent lifting sections 1 and the connecting portion 21 and the corresponding lifting section 1 are connected by a pin 3; each lifting section 1 includes two lifting plates arranged at intervals, and each lifting plate has a first circular hole for inserting the pin 3 at both ends, and a second circular hole for inserting the pin 3 corresponding to the corresponding first circular hole is opened on the connecting portion 21; the upper end of the connecting portion 21 extends to the interior of the corresponding lifting section 1. The spacer sleeve 4 is sleeved on the pin 3, and the spacer sleeve 4 is located between the corresponding two lifting plates for positioning. The lifting section adopts a hollow structure, which can reduce its weight and reduce resource waste while ensuring strength. At the same time, it can reduce the work done by the crane and reduce energy waste.

[0042] In other embodiments, the lifting section 1 may also be a rod-shaped structure.

[0043] In Example 1 and Example 2, the hook head 22 is arc-shaped, the line between the center of the hook head 22 and the center of the second circular hole is the first line, and the line between the center of gravity of the hook body 2 and the center of the second circular hole is the second line; the angle between the first line and the second line is θ, 30°≤θ≤60°; when the ladle is not mounted, the second line is collinear with the central axis of the lifting assembly; when the ladle is mounted, the first line is collinear with the central axis of the lifting assembly.

[0044] like Figure 1 As shown, in Embodiment 1, the angle between the first connecting line and the second connecting line is 45°.

[0045] like Figure 3-4 As shown, in Embodiment 2, the angle between the first connecting line and the second connecting line is 60°. When in use, the rotation angle of the hook head 22 can reach 60°.

[0046] In other embodiments, the angle between the first connecting line and the second connecting line may also be 30°, 35°, 40°, 45°, 50° or 55°.

[0047] In other embodiments, the hook head 22 may also be V-shaped.

[0048] In embodiments 1 and 2, the connection portion 21 is an L-shaped connection portion 21, the short side of the L-shaped connection portion 21 is hinged to the lifting assembly, and the long side is fixedly connected to the hook head 22. In other embodiments, the connection portion 21 can also be other irregular shapes.

[0049] In embodiments 1 and 2, a counterweight 23 is provided outside the corner of the L-shaped connecting portion 21, and the distance of the center of gravity of the hook head 22 from the central axis of the lifting assembly when the ladle is not mounted can be adjusted by the counterweight 23. In other words, the center of gravity of the hook body 2 is adjusted by selecting counterweights 23 of different weights, thereby realizing the design of the tipping angle.

[0050] In embodiments 1 and 2, arc-shaped transition portions are provided on the inner and outer sides of the corners of the L-shaped connecting portion 21 , which can reduce stress concentration and avoid fracture at the corners, thereby increasing the service life of the L-shaped connecting portion 21 .

[0051] Furthermore, a wear-resistant protective plate is fixedly provided on the inner side of the hook head 22. The wear-resistant protective plate is a manganese steel plate, and the thickness of the wear-resistant protective plate is 10 mm. By providing the wear-resistant protective plate, the wear resistance of the hook head 22 can be improved; when the wear-resistant protective plate is worn, a new wear-resistant protective plate can be welded on the hook head 22 part, and the hook head 22 can continue to be used, thereby increasing the service life of the hook head 22 and reducing the cost of replacing spare parts. This avoids the waste of resources caused by the need to replace the entire hook body 2 due to the easy damage of the hook head 22 in the prior art.

[0052] In other embodiments, the wear-resistant protection plate may also be a chromium carbide composite steel plate, or other types of wear-resistant steel plates.

[0053] It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A ladle tipping device for a casting crane, characterized in that: The ladle tilting device comprises a lifting assembly and a hook body, wherein the upper portion of the lifting assembly is connected to the auxiliary lifting mechanism, and the lower portion is hinged to the hook body; The lifting assembly comprises a plurality of lifting segments, and adjacent lifting segments are hinged so that each of the lifting segments can swing; The hook body comprises a connecting portion and a hook head; one end of the connecting portion is hinged to the corresponding lifting section, and the hook head is arranged at the other end, and the connecting portion extends to one side of the lifting assembly; When the ladle is not mounted, the hook head is located on one side of the central axis of the lifting assembly; when the ladle is mounted, the connecting portion rotates relative to the lifting assembly around the hinge point so that the hook head is located on the central axis of the lifting assembly; Adjacent lifting sections and the connecting part and the corresponding lifting section are connected by a pin shaft; each lifting section includes two lifting plates arranged at intervals, and each lifting plate has a first circular hole for inserting the pin shaft at both upper and lower ends, and a second circular hole for inserting the pin shaft corresponding to the corresponding first circular hole is opened on the connecting part; the upper end of the connecting part extends to the interior of the corresponding lifting section; The hook head is in an arc shape, the line between the center of the hook head and the center of the second circular hole is the first line, and the line between the center of gravity of the hook body and the center of the second circular hole is the second line; the angle between the first line and the second line is θ, 30°≤θ≤60°; when the molten iron ladle is not mounted, the second line is collinear with the central axis of the lifting assembly; when the molten iron ladle is mounted, the first line is collinear with the central axis of the lifting assembly; The connecting portion is an L-shaped connecting portion, the short side of the L-shaped connecting portion is hinged to the lifting assembly, and the long side is fixedly connected to the hook head.

2. The ladle tilting device for a casting crane according to claim 1, characterized in that: The total length of the lifting assembly exceeds the distance between the tipping lug of the ladle and the upper edge of the ladle.

3. The ladle tilting device for a casting crane according to claim 1, characterized in that: A counterweight is provided on the outside of the corner of the L-shaped connecting portion, and by selecting the counterweights of different weights, the distance by which the center of gravity of the hook head deviates from the central axis of the lifting assembly when the ladle is not mounted can be adjusted.

4. The ladle tilting device for a casting crane according to claim 1, characterized in that: Arc-shaped transition portions are provided on the inner side and the outer side of the corners of the L-shaped connecting portion.

5. The ladle tilting device for a casting crane according to claim 1, characterized in that: A wear-resistant protective plate is fixedly arranged on the inner side of the hook head.

6. The ladle tilting device for a casting crane according to claim 5, characterized in that: The wear-resistant protective plate is a manganese steel plate or a chromium carbide composite steel plate.

7. The ladle tilting device for a casting crane according to claim 5, characterized in that: The thickness of the wear-resistant protective plate is 10 mm.

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