Auxiliary lifting appliance for gantry plate hook

Abstract

The utility model relates to the field of lifting appliances, and discloses an auxiliary lifting appliance for a gantry plate hook, which comprises a cross beam, a lifting fork and a lifting hook, lifting lugs are arranged on the two sides of the cross beam, lifting holes are formed in the lifting lugs, and hook parts of the gantry plate hooks penetrate through the lifting holes to be connected with the lifting lugs. The two lifting forks are connected with the cross beam and are symmetrically arranged left and right; a lifting handle of the lifting hook is hinged to the lower end of the lifting fork; and a hook part of the lifting hook is connected with trunnions on two sides of the ladle. The utility model solves the problems that the distance between the gantry plate hooks is fixed, the gantry plate hooks are not suitable for ladles with different specifications, and the universality is not strong, and has the characteristics of high safety and strong practicability.

Description

Technical Field

[0001] The utility model relates to the field of lifting slings, in particular to an auxiliary sling for a gantry plate hook. Background Art

[0002] Gantry hooks are widely used in steel enterprises, mainly for lifting and dumping ladles of molten iron and steel. In actual production, the two plate hooks of the gantry hooks hook the trunnions of the molten iron ladle for lifting operations, but the specifications and models of the ladles are not the same, and the spacing between the trunnions is different. Therefore, there are the following problems when lifting the ladles. The traditional gantry hooks have a fixed spacing and are only suitable for lifting ladles of a single specification. For ladles of different specifications, the gantry hooks need to be replaced, which not only affects production, but also is cumbersome to operate and poses safety hazards.

[0003] The gantry plate hook sling disclosed in the Chinese patent application number CN201720589369.X and titled "A gantry plate hook sling capable of effectively avoiding unhooking" includes a crossbeam, a lifting fork, a pin shaft I, a pin shaft II, and a plate hook. A lifting fork is arranged at both ends of the crossbeam, which sets the pulley block of the hook on the lifting trolley on the crossbeam of the gantry plate hook sling. The gantry plate hook sling is connected to the lifting trolley as a whole through the winding of the wire rope, which effectively avoids the occurrence of unhooking accidents. However, it does not involve the problems mentioned in this application. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide an auxiliary lifting device for a gantry plate hook to solve the above-mentioned problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An auxiliary lifting device for a gantry plate hook comprises: a crossbeam, a lifting fork and a lifting hook; lifting ears are arranged on both sides of the crossbeam, and lifting holes are arranged on the lifting ears, and the hook part of the gantry plate hook passes through the lifting holes and is connected with the lifting ears; the lifting fork is movably connected to the crossbeam, and there are two lifting forks, which are symmetrically arranged on the left and right; the lifting handle of the lifting hook is hinged to the lower end of the lifting fork, and the hook part of the lifting hook is connected to the ear shafts on both sides of the molten iron ladle.

[0007] The above-mentioned auxiliary lifting device for the gantry plate hook, the lifting fork is connected to the crossbeam through the lifting fork shaft, a movable groove is arranged on the crossbeam, the lifting fork shaft is a three-section structure, the middle section has a rectangular cross-section that matches the movable groove, and the two side sections have circular cross-sections; the lifting fork is a fork-shaped structure, which is installed on the two side sections of the lifting fork shaft through bearings; a sliding rail is arranged in the movable groove, and a sliding block matching the sliding rail is arranged on the middle section of the lifting fork shaft, and the lifting fork shaft can slide back and forth along the sliding rail.

[0008] The auxiliary lifting device for the gantry plate hook is provided with a push-pull assembly between the two lifting fork shafts.

[0009] The above-mentioned auxiliary lifting device for the gantry plate hook, the push-pull assembly is a double-headed screw, and the double-headed screw is composed of a first screw, a second screw, and an intermediate nut. One end of the first screw and the second screw are respectively provided with threads of opposite rotation directions, and the internal thread of the intermediate nut is a two-stage type, which matches the threads of the first screw and the second screw to form a thread pair.

[0010] The auxiliary sling for the gantry plate hook is additionally provided with a shelf, on which a shelf groove matching the crossbeam is arranged, and the auxiliary sling is placed in the shelf groove on the shelf when not in use.

[0011] The auxiliary lifting device for the gantry plate hook is provided with guide plates on both sides of the lifting hole. The guide plates are trapezoidal in shape, and their roots are connected to the lifting ears. The inclined surface of the trapezoid is convenient for guiding the hook of the gantry plate hook into the lifting hole.

[0012] The auxiliary lifting device for the gantry plate hook is provided with a locking assembly on the lifting fork. After the distance between the two lifting forks is adjusted to the right position, the locking assembly and the crossbeam can be locked. Beneficial Effects

[0013] Compared with the prior art, the utility model has the following advantages: First, through the transfer and lifting of the auxiliary lifting device, the problem of the fixed spacing of the gantry plate hooks, the inability to be applicable to ladles of different specifications and the low versatility is solved; the lifting fork can be movably connected to the crossbeam, and by adjusting the spacing between the lifting forks, the auxiliary lifting device can be applicable to ladles with different ear axis spacings. Second, a push-pull assembly is provided between the two lifting forks, and the push-pull action of the push-pull assembly can quickly adjust the spacing between the lifting forks. Third, a special shelf is provided to solve the problem that the lifting device is large in size and weight and the disassembly is purely dependent on manual labor and is difficult. Fourth, by providing trapezoidal guide plates on both sides of the lifting hole, the trapezoidal inclined surface facilitates guiding the hook of the gantry plate hook into the lifting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a partial structural schematic diagram of the utility model;

[0017] Figure 3 It is another partial structural schematic diagram of the utility model;

[0018] Figure 4 This is another partial structural schematic diagram of the utility model;

[0019] Figure 5 This is a schematic diagram of the lifting lug structure of the utility model;

[0020] The symbols in the figure represent:

[0021] 1. Crossbeam, 1-1, lifting ear, 1-1-1, lifting hole, 1-1-2, guide plate, 2. Lifting fork, 2-1, lifting fork shaft, 3. Lifting hook, 4. Gantry hook, 5. Ladle, 5-1, ear shaft, 6. Push-pull assembly, 6-1, first screw, 6-2, second screw, 6-3, middle nut. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] See also Figures 1 to 5 The utility model includes a crossbeam 1, a lifting fork 2 and a hook 3. Lifting ears 1-1 are arranged on both sides of the crossbeam 1, and lifting holes 1-1-1 are arranged on the lifting ears 1-1. The hook of the gantry hook 4 passes through the lifting holes and is connected to the lifting ears 1-1. The crossbeam 1 is suspended on the two hooks of the gantry hook 4 through the two lifting ears 1-1. The lifting holes 1-1-1 are rectangular, and their sizes match the hooks of the gantry hook 4. The lifting fork 2 is connected to the crossbeam 1, and the number of the lifting forks 2 is 2, such as Figure 1 the handle of the hook 3 is hinged to the lower end of the fork 2, the hook portion of the hook 3 is connected to the ear shaft 5-1 on both sides of the ladle 5, and the ladle 5 can rotate along the ear shaft 5-1 in the hook portion of the hook 3.

[0024] The distance between the two lifting forks 2 is the same as the distance between the ear shafts 5-1 on both sides of the molten iron ladle 5. The distance between the two lifting forks 2 can be set to a fixed type, which is suitable for a certain model of molten iron ladle 5, or it can be set to a movable structure with adjustable spacing to adapt to different models of molten iron ladle 5.

[0025] The lifting fork 2 with adjustable spacing can adopt the following scheme: the lifting fork 2 is connected to the crossbeam 1 through the lifting fork shaft 2-1, and the crossbeam 1 is provided with a movable groove 1-2. The lifting fork shaft 2-1 is a three-section structure, the middle section has a rectangular cross-section, which matches the movable groove 1-2, and the two side sections have a circular cross-section; the lifting fork 2 is a fork-shaped structure, which is installed on the two side sections of the lifting fork shaft 2-1 through bearings; the three-section structure of the lifting fork shaft 2-1 is cylindrical on both sides and a rectangular parallelepiped in the middle, and the lifting fork 2 is installed on both sides of the lifting fork shaft 2-1 through bearings; a sliding rail is provided in the movable groove 1-2, and a slider matching the sliding rail is provided on the middle section of the lifting fork shaft 2-1, and the lifting fork shaft 2-1 can slide back and forth along the sliding rail. In this structure, the lifting fork 2 is connected to the crossbeam 1 through the lifting fork shaft 2-1, and the lifting fork shaft 2-1 can move along the crossbeam 1. The above-mentioned sliding rail can be a rectangular sliding rail, such as Figure 2 The slide rail shown is a rectangular groove, and the slider is a rectangular protrusion, and the two match to form a sliding pair.

[0026] The adjustment of the spacing between the forks 2 can be achieved by using a push-pull member. A push-pull assembly 6 is provided between the two fork shafts 2-1. The push-pull assembly 6 is a double-headed screw rod, which is composed of a first screw rod 6-1, a second screw rod 6-2, and an intermediate nut 6-3. One end of the first screw rod 6-1 and the second screw rod 6-2 are respectively provided with threads with opposite rotation directions. The internal thread of the intermediate nut 6-3 is a two-stage type, which matches the threads of the first screw rod 6-1 and the second screw rod 6-2 to form a thread pair. By screwing the intermediate nut 6-3, the first screw rod 6-1 and the second screw rod 6-2 can be extended and retracted at the same time. The push-pull assembly 6 can also use an electric cylinder or a hydraulic cylinder. If a hydraulic cylinder is used, a double-outlet hydraulic cylinder can be used. After the hydraulic rods of the double-outlet hydraulic cylinder extend from both ends of the cylinder barrel, they are respectively connected to the two fork shafts 2-1, and the cylinder barrel is connected to the crossbeam 1.

[0027] The device of the utility model is large in size and weight, and its removal from the gantry hook 4 is manual and difficult, so a shelf 7 is added, and the shelf 7 is provided with a shelf groove matching the crossbeam 1, and the auxiliary lifting device is placed in the shelf groove on the shelf 7 when not in use. When the utility model is assembled with the gantry hook 4, the gantry hook 4 is moved to the top of the shelf 7, and the two hooks of the gantry hook are inserted from the two hanging holes 1-1-1 to achieve the combination of the two.

[0028] Since the hook of the gantry hook 4 is not easy to penetrate into the hanging hole 1-1-1 during the movement, especially when the auxiliary hanger is placed on the shelf, the following solution can be adopted: guide plates 1-1-2 are arranged on both sides of the hanging hole 1-1-1, and the guide plates 1-1-2 are trapezoidal, and the root of the guide plates 1-1-2 is connected to the hanging ear 1-1, that is, the lower bottom of the trapezoid is connected to the hanging ear 1-1, and the inclined surface of the trapezoid is convenient for guiding the hook of the gantry hook into the hanging hole 1-1-1. The guide plates 1-1-2 are symmetrically arranged on both sides of the hanging hole 1-1-1, and 2-3 pieces can be arranged on each side.

[0029] For the lifting forks 2 with adjustable spacing, a locking assembly is provided on the lifting forks 2. After the spacing between the two lifting forks 2 is adjusted to the desired position, the two lifting forks 2 can be locked by the locking assembly and the cross beam 1. A simpler locking assembly can be provided by providing a locking bolt on the lifting forks 2. When the locking bolt is tightened, the end of the bolt is pressed against the cross beam 1, and the locking is achieved by the friction between the end of the bolt and the cross beam 1. For the lifting forks 2 that move slowly and are mainly subjected to vertical forces, this friction can meet the requirements.

Claims

1. An auxiliary lifting device for a gantry plate hook, characterized in that: include: A crossbeam (1), a lifting fork (2) and a lifting hook (3); lifting ears (1-1) are arranged on both sides of the crossbeam (1), and lifting holes (1-1-1) are arranged on the lifting ears (1-1); the hook part of the gantry hook (4) passes through the lifting hole (1-1-1) and is connected to the lifting ears (1-1); the lifting fork (2) is movably connected to the crossbeam (1), and the number of the lifting forks (2) is two and they are symmetrically arranged on the left and right; the lifting handle of the lifting hook (3) is hinged to the lower end of the lifting fork (2), and the hook part of the lifting hook (3) is connected to the ear shafts (5-1) on both sides of the iron ladle (5).

2. The auxiliary lifting device for gantry plate hook according to claim 1, characterized in that: The lifting fork (2) is connected to the crossbeam (1) via a lifting fork shaft (2-1); a movable groove (1-2) is provided on the crossbeam (1); the lifting fork shaft (2-1) is a three-section structure; the middle section has a rectangular cross section that matches the movable groove (1-2); and the sections on both sides have circular cross sections; the lifting fork (2) is a fork-shaped structure that is mounted on the two side sections of the lifting fork shaft (2-1) via bearings; a slide rail is provided in the movable groove (1-2); a slider that matches the slide rail is provided on the middle section of the lifting fork shaft (2-1); and the lifting fork shaft (2-1) can slide back and forth along the slide rail.

3. The auxiliary lifting device for gantry plate hook according to claim 2, characterized in that: A push-pull assembly (6) is provided between the two lifting fork shafts (2-1).

4. The auxiliary lifting device for gantry plate hook according to claim 3, characterized in that: The push-pull assembly (6) is a double-headed screw rod, which is composed of a first screw rod (6-1), a second screw rod (6-2), and an intermediate nut (6-3). One end of the first screw rod (6-1) and the second screw rod (6-2) are respectively provided with threads with opposite rotation directions. The internal thread of the intermediate nut (6-3) is a two-stage type, which matches the threads of the first screw rod (6-1) and the second screw rod (6-2) to form a thread pair.

5. The auxiliary lifting device for gantry plate hook according to claim 1, characterized in that: A shelf (7) is additionally provided, wherein the shelf (7) is provided with a shelf groove matching the crossbeam (1), and the auxiliary sling is placed in the shelf groove on the shelf (7) when not in use.

6. The auxiliary lifting device for gantry plate hook according to claim 1, characterized in that: Guide plates (1-1-2) are arranged on both sides of the lifting hole (1-1-1); the guide plates (1-1-2) are trapezoidal in shape, the base of which is connected to the lifting ear (1-1); the inclined surface of the trapezoid facilitates guiding the hook of the gantry plate hook into the lifting hole (1-1-1).

7. The auxiliary lifting device for gantry plate hook according to claim 2, characterized in that: A locking assembly is provided on the lifting fork (2), and after the distance between the two lifting forks (2) is adjusted to the right position, the two lifting forks (2) can be locked between the locking assembly and the crossbeam (1).

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