Tundish crane and lifting appliance balancing device and method thereof

Abstract

The invention discloses a tundish crane and a lifting appliance balancing device and method.The lifting appliance balancing device comprises a cross beam, a plurality of plate hooks arranged below the cross beam, a lifting fork connected between the cross beam and the plate hooks and a plurality of movable pulley sets symmetrically arranged at the two ends of the top of the cross beam, and a plurality of balancing assemblies are arranged at the top of one end of the cross beam; the balance assembly comprises a balance seat fixed to the top of the cross beam, an adjusting plate connected to the balance seat through a fastener and a balancing weight connected to the adjusting plate, and the adjusting plate is hinged to the balance seat through a pin shaft. The cross beam can still be kept in a horizontal state under the empty hook condition, manual adjustment by operators is not needed, a large amount of manpower and time cost is saved, potential safety hazards possibly encountered by the operators in the balance adjustment process are avoided, good practicability and safety are achieved, and the labor intensity of the operators is lowered. And the balance assemblies with the corresponding number and distribution positions can be selected according to the tundishes of different shapes and sizes, and the overall adaptability of the device is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tundish cranes, and in particular relates to a tundish crane and a balancing device and method for a sling thereof. Background Art

[0002] In the metallurgical industry, steelmaking is an important link, and in the steelmaking process, the tundish is an indispensable equipment and the connection point from intermittent operation to continuous operation. As a metallurgical reactor, the tundish is an important part of improving steel production and quality. Whether for the smooth progress of continuous casting operations or for ensuring that the quality of molten steel meets the requirements, the role of the tundish cannot be ignored. The tundish is often transported by a tundish crane.

[0003] Tundish cranes are widely used in the metallurgical industry. Existing technologies include Figure 1 As shown, the fixed four-plate hook sling is mainly composed of a crossbeam 1, a lifting fork 2, a plate hook 3, a movable pulley block 4 and other parts. The center of gravity of most tundishes does not coincide with the center of the lifting point. In order to ensure that the sling remains horizontal after the tundish is lifted, the center of the movable pulley block 4 needs to coincide with the center of gravity of the tundish 6. This results in different distances between the movable pulley block 4 and the lifting forks 2 on both sides in the width direction of the crossbeam 1. In this way, the sling cannot maintain a horizontal state when in an empty hook state, and the tundish 6 can only be lifted after the sling is manually assisted to be horizontal. The balancing process is cumbersome and wastes a lot of manpower and material resources. The production efficiency is low and the safety of workers is threatened. In summary, there is an urgent need for a tundish crane and a sling balancing device and method. Summary of the invention

[0004] In order to solve part or all of the technical problems existing in the above-mentioned prior art, the present invention provides a tundish crane and a balancing device and method for its spreader.

[0005] On the one hand, the present invention provides a balancing device for a tundish crane, the balancing device comprising a crossbeam, a plurality of plate hooks arranged below the crossbeam, a lifting fork connected between the crossbeam and the plate hooks, and a plurality of movable pulley blocks symmetrically arranged at both ends of the top of the crossbeam, the lifting forks are symmetrically distributed at the four corners of the crossbeam along the center of the crossbeam, a plurality of balancing components are arranged on the top of one end of the crossbeam, and the plurality of balancing components are symmetrically distributed along the center line of the width direction of the crossbeam, wherein:

[0006] The balancing assembly includes a balancing seat fixed to the top of the beam, an adjustment plate connected to the balancing seat by fasteners, and a counterweight connected to the adjustment plate. A sandwich is provided in the middle of the balancing seat, and the adjustment plate is arranged in the sandwich. A first through hole is opened in the middle of the balancing seat, and a plurality of first fixing holes are evenly distributed circumferentially on the balancing seat around the first through hole. A second through hole matching the first through hole is opened on the adjustment plate, and a plurality of second fixing holes are evenly distributed circumferentially on the adjustment plate around the second through hole. The first through hole and the second through hole are hinged by a pin shaft, and the first fixing hole and the second fixing hole are connected by the fastener. The free end of the adjustment plate is connected to the counterweight, and the axis of the first through hole is parallel to the center line of the length direction of the beam.

[0007] Furthermore, in the above-mentioned balancing device for the tundish crane, the positions of the plurality of second fixing holes match the positions of the plurality of first fixing holes.

[0008] Furthermore, in the above-mentioned balancing device for the tundish crane, the counterweight block and the adjustment plate are connected in an integrated manner.

[0009] As a specific implementation, in the above-mentioned balancing device for the tundish crane, the number of the lifting forks and the number of the plate hooks are 4 to 8.

[0010] As a specific implementation, in the above-mentioned spreader balancing device for a tundish crane, the number of the movable pulley blocks is 2 to 4.

[0011] As a specific implementation, in the above-mentioned spreader balancing device for a tundish crane, the number of the balancing components is 2 to 8.

[0012] The method for balancing the spreader of the tundish crane provided by the present invention comprises:

[0013] Step 1: Determine the spacing distance between the balancing assembly and the movable pulley assembly by balancing torque calculation, and then determine the rotation angle between the adjustment plate and the balancing seat;

[0014] Step 2: Remove the fastener between the balancing seat and the adjusting plate, rotate the adjusting plate to a specified angle, make the axis of the first fixing hole coincide with the axis of the second fixing hole, and fix the relative position between the adjusting plate and the balancing seat by the fastener;

[0015] Step 3: After balancing the sling, the plate hook is hung on the lifting lug provided on the tundish to lift the tundish.

[0016] On the other hand, the present invention further provides a tundish crane, which comprises the above-mentioned spreader balancing device.

[0017] The tundish crane and the balancing device and method thereof of the present invention have the following advantages and positive effects:

[0018] The present invention provides a balancing assembly above the crossbeam, and adjusts the rotation angle between the counterweight block and the balance seat, thereby adjusting the center of gravity offset of the counterweight block, thereby achieving that the crossbeam can still remain in a horizontal state when the hook is empty, without the need for manual adjustment by the operator, saving a large amount of manpower and time costs, and avoiding potential safety hazards that the operator may encounter in the process of adjusting the balance. The present invention has good practicality and safety, and can select balancing assemblies of corresponding quantity and distribution positions according to tundishes of different shapes and sizes, thereby improving the overall adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 It is a front view of a four-plate hook sling in the prior art;

[0021] Figure 2 It is a side view of a four-plate hook spreader in the prior art;

[0022] Figure 3 It is a structural schematic diagram of a balancing device for a tundish crane of the present invention;

[0023] Figure 4 is a side view of a spreader balancing device for a tundish crane of the present invention;

[0024] Figure 5 It is a schematic structural diagram of a tundish in a balancing device for a tundish crane of the present invention;

[0025] Figure 6 It is a structural schematic diagram of a balancing assembly in a balancing device for a tundish crane of the present invention;

[0026] Figure 7 It is a structural schematic diagram of a counterweight block in a balancing device for a tundish crane of the present invention;

[0027] Figure 8It is a structural schematic diagram of a balancing seat in a balancing device for a tundish crane of the present invention;

[0028] Fig. 9 It is a front view of a balancing assembly in a balancing device for a tundish crane according to the present invention.

[0029] Description of reference numerals:

[0030] 1-crossbeam, 11-crossbeam center of gravity, 2-lifting fork, 3-plate hook, 4-movable pulley block, 5-balance assembly, 51-balance seat, 52-second fixing hole, 53-first through hole, 54-first fixing hole, 55-adjustment plate, 56-counterweight block, 57-second through hole, 6-middle bag, 61-lifting ear, 7-pin shaft, 8-fastener, 9-center of gravity of sling balancing device. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] like Figures 1 to 9 As shown, the present invention provides a tundish crane and a balancing device and method for its hoisting tool.

[0033] On the one hand, the present invention discloses a balancing device for a tundish crane, the balancing device comprising a crossbeam 1, a plurality of plate hooks 3 arranged below the crossbeam 1, a lifting fork 2 connected between the crossbeam 1 and the plate hook 3, and a plurality of movable pulley blocks 4 symmetrically arranged at both ends of the top of the crossbeam 1, the lifting fork 2 is symmetrically distributed at the four corners of the crossbeam 1 along the center of the crossbeam 1, the four corners of the tundish 6 are respectively provided with lifting ears 61, the plate hook 3 matches the lifting ears 61, a plurality of balancing components 5 are arranged on the top of one end of the crossbeam 1, and the plurality of balancing components 5 are arranged along the crossbeam 1. The movable pulley block 4 is symmetrically distributed along the midline in the width direction, the distance between the movable pulley block 4 and the first side fork 2 is smaller than the distance between the second side fork 2, the balancing assembly 5 is arranged above the first side fork 2, wherein the balancing assembly 5 comprises a balancing seat 51 fixed to the top of the crossbeam 1, an adjusting plate 55 connected to the balancing seat 51 through a fastener 8, and a counterweight 56 ​​connected to the adjusting plate 55, a sandwich is arranged in the middle of the balancing seat 51, the adjusting plate 55 is arranged in the sandwich, a first through hole 53 is opened in the middle of the balancing seat 51, and a A plurality of first fixing holes 54 are evenly arranged circumferentially on the balancing seat 51 at the center, a second through hole 57 matching the first through hole 53 is opened on the adjusting plate 55, and a plurality of second fixing holes 52 are evenly arranged circumferentially on the adjusting plate 55 along the second through hole 57 as the center, the first through hole 53 and the second through hole 57 are hingedly connected by a pin shaft 7, and the first fixing hole 54 and the second fixing hole 52 are connected by a fastener 8. When the fastener 8 is fixed between the first fixing hole 54 and the second fixing hole 52, the adjusting plate 55 and the balancing seat 5 1 is restricted, when the fastener 8 between the first fixing hole 54 and the second fixing hole 52 is removed, the adjusting plate 55 can rotate along the first through hole 53 as the center, when the adjusting plate 55 rotates clockwise, the center of gravity of the counterweight 56 ​​shifts toward the second side fork 2, when the adjusting plate 55 rotates counterclockwise, the center of gravity of the counterweight 56 ​​shifts toward the first side fork 2, the free end of the adjusting plate 55 is connected to the counterweight 56, and the axis of the first through hole 53 is parallel to the midline of the length direction of the crossbeam 1.

[0034] Furthermore, in the sling balancing device for the tundish crane of the present invention, the positions of the multiple second fixing holes 52 match the positions of the multiple first fixing holes 54. In this way, when the adjustment plate 55 is rotated to a specific angle, the axes of the multiple first fixing holes 54 coincide with the axes of the multiple second fixing holes 52 one by one, and fasteners 8 can be used for fixing.

[0035] Furthermore, in the balancing device for the tundish crane of the present invention, the counterweight block 56 and the adjustment plate 55 are connected in an integrated manner, and of course, welding, snap-on connection and other connection methods may also be used.

[0036] As a specific implementation, in the sling balancing device for the tundish crane of the present invention, the number of lifting forks 2 and plate hooks 3 is 4 to 8. More specifically, the number of lifting forks 2 and plate hooks 3 is 4 and distributed at the four corners of the beam 1. Of course, the specific number and distribution position of the lifting forks 2 and plate hooks 3 shall be set according to the shape and size of the tundish 6 to be lifted during actual use.

[0037] As a specific embodiment, in the sling balancing device for the tundish crane of the present invention, the number of movable pulley blocks 4 is 2 to 4, more specifically, the number of movable pulley blocks 4 is 2, which are distributed at both ends of the length direction of the beam 1, and the movable pulley blocks 4 are connected to the tundish crane through wire ropes.

[0038] As a specific implementation, in the sling balancing device for the tundish crane of the present invention, the number of balancing components 5 is 2 to 8, more specifically, the number of balancing components 5 is 2. Of course, the specific number and distribution positions of the balancing components 5 are also set according to the shape and size of the tundish 6 to be hoisted during actual use.

[0039] The balancing method for a tundish crane of the present invention is implemented by using the balancing device for the tundish crane, and specifically comprises the following steps:

[0040] Step 1: Determine the spacing distance between the balancing assembly and the movable pulley assembly by balancing torque calculation, and then determine the rotation angle between the adjustment plate 55 and the balancing seat 51;

[0041] Step 2: Remove the fastener 8 between the balancing seat 51 and the adjusting plate 55, rotate the adjusting plate 55 to a specified angle, make the axis of the first fixing hole 54 coincide with the axis of the second fixing hole 52, and fix the relative position between the adjusting plate 55 and the balancing seat 51 by the fastener 8;

[0042] Step 3: After balancing the lifting device, the plate hook 3 is hung on the lifting lug 61 provided on the tundish 6 to lift the tundish 6 .

[0043] As a specific implementation method, during the calculation of the balancing torque, the following formula needs to be satisfied:

[0044] Ge=2G p L, Wherein L is the distance from the center of gravity of the counterweight block 56 to the center of the beam 11; G p is the weight of the counterweight 56; e is the distance from the center of gravity 9 of the sling balancing device to the center of the beam 11; G is the weight of the sling balancing device.

[0045] On the other hand, the present invention further provides a tundish crane, which comprises the above-mentioned spreader balancing device.

[0046] In summary, compared with the prior art, the tundish crane and its balancing device and method of the present invention have the following advantages and positive effects:

[0047] The present invention provides a balancing assembly 5 above the crossbeam 1, and adjusts the rotation angle between the counterweight block 56 and the balance seat 51, thereby adjusting the center of gravity offset of the counterweight block 56, so that the crossbeam 1 can still remain in a horizontal state when the hook is empty. There is no need for manual adjustment by the operator, which saves a lot of manpower and time costs and avoids the potential safety hazards that the operator may encounter during the balance adjustment process. It has good practicality and safety, and can select the corresponding number and distribution positions of the balancing assemblies 5 according to the different shapes and sizes of the intermediate bags 6, thereby improving the overall adaptability of the device.

[0048] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A balancing device for a tundish crane, comprising a crossbeam, a plurality of plate hooks arranged below the crossbeam, a lifting fork connected between the crossbeam and the plate hooks, and a plurality of movable pulley blocks symmetrically arranged at both ends of the top of the crossbeam, wherein the lifting forks are symmetrically distributed at the four corners of the crossbeam along the center of the crossbeam, and characterized in that: A plurality of balancing components are disposed on the top of one end of the beam, and the plurality of balancing components are symmetrically distributed along the midline of the width direction of the beam, wherein: The balancing assembly includes a balancing seat fixed to the top of the beam, an adjustment plate connected to the balancing seat by fasteners, and a counterweight connected to the adjustment plate. A sandwich is provided in the middle of the balancing seat, and the adjustment plate is arranged in the sandwich. A first through hole is opened in the middle of the balancing seat, and a plurality of first fixing holes are evenly distributed circumferentially on the balancing seat around the first through hole. A second through hole matching the first through hole is opened on the adjustment plate, and a plurality of second fixing holes are evenly distributed circumferentially on the adjustment plate around the second through hole. The first through hole and the second through hole are hinged by a pin shaft, and the first fixing hole and the second fixing hole are connected by the fastener. The free end of the adjustment plate is connected to the counterweight, and the axis of the first through hole is parallel to the center line of the length direction of the beam.

2. The balancing device for a tundish crane according to claim 1, characterized in that: Positions of the plurality of second fixing holes match positions of the plurality of first fixing holes.

3. The balancing device for a tundish crane according to claim 1, characterized in that: The counterweight block and the adjustment plate are connected in an integrated manner.

4. The balancing device for a tundish crane according to claim 1, characterized in that: The number of the lifting forks and the number of the plate hooks are both 4 to 8.

5. The balancing device for a tundish crane according to claim 1, characterized in that: The number of the movable pulley blocks is 2 to 4.

6. The balancing device for a tundish crane according to claim 1, characterized in that: The number of the balancing components is 2 to 8.

7. A method for balancing a spreader for a tundish crane, the method being implemented by using the spreader balancing device according to any one of claims 1 to 6, comprising: Step 1: Determine the spacing distance between the balancing assembly and the movable pulley assembly by balancing torque calculation, and then determine the rotation angle between the adjustment plate and the balancing seat; Step 2: Remove the fastener between the balancing seat and the adjusting plate, rotate the adjusting plate to a specified angle, make the axis of the first fixing hole coincide with the axis of the second fixing hole, and fix the relative position between the adjusting plate and the balancing seat by the fastener; Step 3: After balancing the sling, the plate hook is hung on the lifting lug provided on the tundish to lift the tundish.

8. A tundish crane, characterized in that: The tundish crane comprises the spreader balancing device according to any one of claims 1-6.

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