A rotary sling for a metallurgical crane

Abstract

The utility model relates to a kind of rotary hangers for metallurgical crane, including the horizontal setting of hoist beam, the bottom surface both ends of hoist beam are equipped with two opposite setting hooks;The top of hoist beam is provided with the horizontally distributed load-bearing disc, load-bearing disc is circular ring structure, and the top surface both sides of load-bearing disc are equipped with movable pulley group, coaxial line is installed on the load-bearing disc between two movable pulley groups, and rotary motor is installed, coaxial line is installed on the output shaft of rotary motor, and shaft is installed, the bottom end of shaft passes through load-bearing disc and is connected with hoist beam after;Between hoist beam and load-bearing disc, the anti-falling mechanism that can prevent hoist beam from falling is arranged, and the anti-falling mechanism includes circular ring chute that is coaxial line and is opened on the bottom surface of load-bearing disc, the vertical section of circular ring chute is T type structure, and two T type sliders are slidably connected in circular ring chute, and the vertical bottom end of T type slider passes through load-bearing disc and is respectively connected with the two sides of hoist beam after, the utility model reduces the security risk that hoist beam falls from high place when using.

Description

Technical Field

[0001] This utility model belongs to the field of lifting tool technology, and in particular relates to a rotary lifting tool for metallurgical cranes. Background Technology

[0002] Currently, in the metallurgical industry, molten steel ladles are typically lifted using metallurgical cranes. Specifically, the lifting device of a metallurgical crane is equipped with two hooks. During use, after the metallurgical crane lowers the lifting device to a certain height, the two hooks can be used to hook the two lifting lugs on the molten steel ladle. Since the molten steel ladle needs to be rotated after being lifted into position, the lifting devices on existing metallurgical cranes are rotary lifting devices. For example, the utility model patent with publication number CN211169569U discloses a planetary rotary lifting device for metallurgical cranes. This utility model can achieve free rotation of the metallurgical steel ladle during use.

[0003] However, during long-term use, the connection between the rotating shaft and the lower beam, as well as the connection between the rotating shaft and the planetary reducer, may become loose, which could pose a safety hazard of the lower beam falling from a height. Therefore, there are still shortcomings and deficiencies in the existing technology. Utility Model Content

[0004] The purpose of this utility model is to provide a rotary lifting device for metallurgical cranes to solve the problems mentioned in the background art.

[0005] The technical solution adopted by this utility model to solve the above problems is as follows:

[0006] A rotary lifting device for a metallurgical crane includes a horizontally arranged lifting beam with two opposing hooks installed at both ends of the bottom surface of the beam. A horizontally distributed support plate is arranged above the lifting beam. The support plate has a circular structure, and movable pulley blocks are installed on both sides of its top surface. A rotary motor is coaxially mounted on the support plate located between the two movable pulley blocks. A rotating shaft is coaxially mounted on the output shaft of the rotary motor, and the bottom end of the rotating shaft passes through the support plate and connects to the lifting beam.

[0007] A fall prevention mechanism is provided between the lifting beam and the support plate to prevent the lifting beam from falling. The fall prevention mechanism includes an annular groove coaxially formed on the bottom surface of the support plate. The vertical cross-section of the annular groove is a T-shaped structure, and two matching T-shaped sliders are slidably connected inside the annular groove. The vertical bottom ends of the T-shaped sliders pass through the support plate and are connected to both sides of the lifting beam respectively.

[0008] Furthermore, the fall protection mechanism includes a fall protection ring, which is coaxially fixedly fitted onto the outer wall of the bearing plate. Both ends of the lifting beam are fixedly connected to vertically distributed columns located outside the fall protection ring. The inner side of the top of each column is fixedly connected to a horizontal block located above the fall protection ring, forming an inverted L-shaped fall protection bar.

[0009] Furthermore, the fall protection mechanism also includes a fall protection ring, which is coaxially fixedly fitted onto the outer wall of the bearing plate. Both ends of the lifting beam are fixedly connected to vertically distributed columns located outside the fall protection ring. The inner side of the top of each column is fixedly connected to a horizontal block located above the fall protection ring, forming an inverted L-shaped fall protection bar.

[0010] Furthermore, a first inverted U-shaped support is installed at both ends of the bottom surface of the lifting beam, and a first pin is installed in each first inverted U-shaped support. The first pins are parallel to the width direction of the lifting beam, and the top of the hook is rotatably fitted onto the first pin.

[0011] Furthermore, a second inverted U-shaped support is rotatably mounted on the first pin, and a second pin located below the first inverted U-shaped support is installed in each second inverted U-shaped support. The second pin is parallel to the length direction of the lifting beam, and the top of the hook is rotatably mounted on the second pin.

[0012] Furthermore, the hook is an anti-detachment hook.

[0013] The beneficial effects of this utility model by adopting the above technical solution are as follows:

[0014] In use, this invention features a rotary motor that drives the lifting beam to rotate, allowing it to be rotated to the designated dropping position after the molten steel ladle is hoisted into place. Furthermore, an anti-fall mechanism is installed between the lifting beam and the support plate to prevent the beam from falling in the event of accidental detachment, without affecting its normal rotation, thus reducing the safety hazard of the beam falling from a height. The anti-fall mechanism employs two different structural forms, which can be configured according to specific needs; alternatively, a combination of these two structural forms can be used to further prevent the beam from falling from a height. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 Side view of the middle part of the device;

[0017] Figure 3 for Figure 1 One of the three-dimensional structural diagrams of the middle part of the device;

[0018] Figure 4 for Figure 1 A schematic diagram of the middle part of the device in cross-section;

[0019] Figure 5 for Figure 1 The second schematic diagram of the three-dimensional structure of the middle part of the device.

[0020] Reference numerals: 1. T-shaped slider; 2. Anti-fall ring; 3. Anti-fall rod; 31. Column; 32. Horizontal block; 4. Bearing plate; 41. Circular groove; 5. Lifting beam; 6. Lifting hook; 61. Anti-detachment plate; 7. Movable pulley block; 8. Rotary motor; 9. Rotating shaft; 10. First inverted U-shaped support; 11. First pin; 12. Second pin; 13. Second inverted U-shaped support. Detailed Implementation

[0021] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0022] like Figures 1 to 5 As shown, this utility model provides a rotary lifting device for a metallurgical crane, including a horizontally arranged lifting beam 5, which is a strip beam; two oppositely arranged hooks 6 are installed at both ends of the bottom surface of the lifting beam 5, which can be used to hook two lifting lugs on the molten steel ladle respectively during use; a horizontally distributed bearing plate 4 is arranged above the lifting beam 5, the bearing plate 4 has a circular structure, and movable pulley blocks 7 are installed on both sides of the top surface of the bearing plate 4. During use, the movable pulley blocks 7 are hung on the wire rope of the lifting mechanism of the metallurgical crane, and the rotary lifting device can be driven to rise and fall by winding and unwinding the wire rope; located at A rotary motor 8 is coaxially mounted on the bearing plate 4 between the two movable pulley blocks 7. The rotary motor 8 is a three-in-one motor in the prior art, and is externally connected to a power supply and a start / stop switch; that is, the rotary motor 8 refers to a comprehensive motor that integrates the motor, reducer and encoder into one. A rotating shaft 9 is coaxially mounted on the output shaft of the rotary motor 8. The bottom end of the rotating shaft 9 passes through the bearing plate 4 and is connected to the lifting beam 5. Specifically, when the rotary motor 8 is started, the rotary motor 8 can drive the lifting beam 5 to rotate. In this way, after the molten steel ladle is hoisted to the position, the molten steel ladle can be rotated to the set dropping position.

[0023] In addition, a fall prevention mechanism is provided between the lifting beam 5 and the bearing plate 4 to prevent the lifting beam 5 from falling. The fall prevention mechanism includes an annular groove 41 coaxially formed on the bottom surface of the bearing plate 4. The vertical cross-section of the annular groove 41 is a T-shaped structure, and two matching T-shaped sliders 1 are slidably connected inside the annular groove 41. The vertical bottom end of the T-shaped sliders 1 passes through the bearing plate 4 and is connected to both sides of the lifting beam 5 respectively. Specifically, during use, when the lifting beam 5 is rotating, the T-shaped sliders 1 can move along the annular groove 41 without affecting the normal rotation of the lifting beam 5. When the lifting beam 5 accidentally falls off, the T-shaped sliders 1 cooperate with the annular groove 41 to prevent the lifting beam 5 from falling, thereby reducing the safety hazard of the lifting beam 5 falling from a height.

[0024] Another specific method for setting up a fall arrest mechanism is as follows: (e.g.) Figure 1 , Figures 3 to 5 As shown, the fall protection mechanism includes a fall protection ring 2, which is coaxially fixedly mounted on the outer wall of the bearing plate 4. Both ends of the lifting beam 5 are fixedly connected to vertically distributed columns 31 located outside the fall protection ring 2. The inner side of the top of each column 31 is fixedly connected to a horizontal block 32 located above the fall protection ring 2, forming an inverted L-shaped fall protection rod 3. Specifically, during use, when the lifting beam 5 rotates, the fall protection rod 3 can move around the circumference of the fall protection ring 2 without affecting the normal rotation of the lifting beam 5. Furthermore, when the lifting beam 5 accidentally falls off, the fall protection rod 3, in conjunction with the fall protection ring 2, can also prevent the lifting beam 5 from falling. In other words, the fall protection mechanism of this utility model adopts two different structural forms, which can be configured according to individual needs during use.

[0025] Furthermore, such as Figure 1 , Figures 3 to 5 As shown, the fall protection mechanism also includes a fall protection ring 2, which is coaxially fixedly mounted on the outer wall of the bearing plate 4. Both ends of the lifting beam 5 are fixedly connected to vertically distributed columns 31 located outside the fall protection ring 2. The inner side of the top of each column 31 is fixedly connected to a horizontal block 32 located above the fall protection ring 2, forming an inverted L-shaped fall protection rod 3. Specifically, during use, when the lifting beam 5 is rotating, the fall protection rod 3 can move around the circumference of the fall protection ring 2 without affecting the normal rotation of the lifting beam 5. When the lifting beam 5 accidentally falls off, the fall protection rod 3 cooperates with the fall protection ring 2 to prevent the lifting beam 5 from falling. This, combined with the T-shaped slider 1 and the annular slide groove 41, further prevents the lifting beam 5 from falling from a height. In other words, the two different structural forms of the fall protection mechanism can be combined to further prevent the lifting beam 5 from falling from a height.

[0026] Furthermore, such as Figure 1 and Figure 2As shown, both ends of the bottom surface of the lifting beam 5 are equipped with first inverted U-shaped supports 10, and each first inverted U-shaped support 10 is equipped with a first pin 11. The first pins 11 are parallel to the width direction of the lifting beam 5. The top of the hook 6 is rotatably fitted onto the first pin 11. Specifically, in use, the hook 6 can rotate around the first pin 11, thus... Figure 1 For example, the hook 6 can swing left and right to lift the lugs on the molten steel ladle.

[0027] Furthermore, such as Figure 1 and Figure 2 As shown, a second inverted U-shaped support 13 is rotatably mounted on the first pin 11. Each second inverted U-shaped support 13 contains a second pin 12 located below the first inverted U-shaped support 10. The second pin 12 is parallel to the length direction of the lifting beam 5. The top of the hook 6 is rotatably mounted on the second pin 12. Specifically, in use, the second inverted U-shaped support 13 can rotate around the first pin 11; and the hook 6 can rotate around the second pin 12. Figure 1 For example, the hook 6 can swing back and forth and left and right, making it easier for the hook 6 to lift the lifting lugs on the molten steel ladle.

[0028] Furthermore, such as Figure 1 and Figure 2 As shown, hook 6 is an anti-detachment hook. Specifically, an anti-detachment plate 61 is installed at the hook-shaped opening of hook 6. One end of the anti-detachment plate 61 is hinged to the hook body of hook 6 via a torsion spring, and the other end of the anti-detachment plate 61 is located inside the hook-shaped opening of hook 6. In this way, the safety hazard of molten steel ladle falling off hook 6 can be reduced during use.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rotary lifting device for a metallurgical crane, comprising a horizontally arranged lifting beam, wherein two oppositely arranged lifting hooks are installed at both ends of the bottom surface of the lifting beam; characterized in that: A horizontally distributed bearing plate is provided above the lifting beam. The bearing plate has a circular structure and is equipped with movable pulley groups on both sides of the top surface of the bearing plate. A rotary motor is coaxially mounted on the bearing plate located between the two movable pulley groups. A rotating shaft is coaxially mounted on the output shaft of the rotary motor. The bottom end of the rotating shaft passes through the bearing plate and is connected to the lifting beam. A fall prevention mechanism is provided between the lifting beam and the support plate to prevent the lifting beam from falling. The fall prevention mechanism includes an annular groove coaxially formed on the bottom surface of the support plate. The vertical cross-section of the annular groove is a T-shaped structure, and two matching T-shaped sliders are slidably connected inside the annular groove. The vertical bottom ends of the T-shaped sliders pass through the support plate and are connected to both sides of the lifting beam respectively.

2. The rotary lifting device for a metallurgical crane according to claim 1, characterized in that: The fall protection mechanism includes a fall protection ring, which is coaxially fixedly fitted onto the outer wall of the bearing plate. Both ends of the lifting beam are fixedly connected to vertically distributed columns located outside the fall protection ring. The inner side of the top of each column is fixedly connected to a horizontal block located above the fall protection ring, forming an inverted L-shaped fall protection bar.

3. A rotating spreader for a metallurgical crane according to claim 1, characterized in that: The fall protection mechanism also includes a fall protection ring, which is coaxially fixedly fitted onto the outer wall of the bearing plate. Both ends of the lifting beam are fixedly connected to vertically distributed columns located outside the fall protection ring. The inner side of the top of each column is fixedly connected to a horizontal block located above the fall protection ring, forming an inverted L-shaped fall protection bar.

4. A rotating spreader for a metallurgical crane according to claim 1, characterized in that: Both ends of the bottom surface of the lifting beam are equipped with a first inverted U-shaped support, and a first pin is installed in each first inverted U-shaped support. The first pin is parallel to the width direction of the lifting beam, and the top of the hook is rotatably fitted onto the first pin.

5. A slewing spreader for a metallurgical crane according to claim 4, characterized in that: A second inverted U-shaped support is rotatably mounted on the first pin shaft. Each second inverted U-shaped support contains a second pin shaft located below the first inverted U-shaped support. The second pin shaft is parallel to the length direction of the lifting beam. The top of the hook is rotatably mounted on the second pin shaft.

6. A rotating spreader for a metallurgical crane according to claim 1, characterized in that: The hook is an anti-detachment hook.

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