Double-crane lifting system in submerged arc furnace and lifting method

Abstract

The invention provides a double-travelling crane lifting system and method in submerged arc furnaces. The lifting system comprises travelling cranes and lifting beam devices which are matched in the two submerged arc furnaces. The lifting beam device comprises a first lifting beam, a second lifting beam and a steering part, the center position of the first lifting beam and the center position of the second lifting beam are coaxially connected through the arranged steering part, the second lifting beam can conduct axial rotation with the first lifting beam as the reference, and the two ends of the first lifting beam are each connected with a crane. The second lifting beam is used for being connected with a material to be lifted and carrying out lifting operation, and in the lifting operation process, the second lifting beam can rotate relative to the first lifting beam through the steering piece, so that the material lifted by the second lifting beam is subjected to lifting steering; in the lifting process, the bearing capacity of the whole lifting system is calculated according to the load capacity of the travelling cranes, and the lifting beam device is designed and manufactured according to the bearing capacity and matched with the two travelling cranes for lifting. The lifting system is easy to assemble, the lifting method is convenient and fast, and the problem that normal operation cannot be achieved due to the fact that a plant structure is limited in a traditional lifting method can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of hoisting construction materials in a submerged arc furnace, and in particular to a double-trailer hoisting system and a hoisting method in a submerged arc furnace. Background Art

[0002] Before the construction of refractory masonry in the furnace of the submerged arc furnace, the factory building must be closed to prevent rainwater from flowing into the furnace and causing the refractory to fail. In order to speed up the overall construction progress of the submerged arc furnace, shorten the installation period, and save construction costs, the main components of the platform are installed and the roof is closed immediately after the installation of the furnace body and the furnace cover of the submerged arc furnace is completed, and the installation of the production crane is completed at the same time. In this way, the refractory construction can be advanced, and the equipment and structure on the furnace can also be carried out synchronously using the crane, which not only saves large-scale lifting equipment shifts, but also achieves the purpose of shortening the overall construction period. However, this method faces a problem. After the factory building is closed, the lifting space is limited and large cranes cannot be used for lifting. Due to production needs, the main function of the production crane is to lift materials, so its performance is reflected in the high working frequency, but the lifting weight will become smaller. In this way, the weight limit of the crane cannot meet the lifting of large equipment. Such large equipment on the furnace includes high-temperature silos, feeding pipes, material tank lifting shafts, and electrode holding systems of the feeding system.

[0003] For example, during the installation of the high-temperature silo of large equipment on the furnace, some equipment has high temperature resistance requirements, so considering the convenience of construction, anchor hook welding and pouring of pouring materials were first carried out on the ground. After pouring, the weight of the equipment reached 27 tons, while the production crane in the plant was only 20 tons, and the lifting work could not be achieved using a single crane. The plant was closed and a crane could not be used for lifting operations. The above problems had a great impact on the installation of heavy equipment. Summary of the invention

[0004] In view of this, on one hand, the present invention proposes a double-crane lifting system in an electric arc furnace, comprising two cranes and a beam device matched in two electric arc furnaces; the beam device comprises a first beam, a second beam and a steering member, the center positions of the first beam and the second beam are coaxially connected through the steering member, the second beam can rotate axially with the first beam as a reference, the two ends of the first beam are respectively connected to a crane, the second beam is used to connect the material to be hoisted and perform hoisting operations, and during the hoisting operation, the second beam can be rotated relative to the first beam through the steering member, thereby steering the hoisting of the material hoisted by the second beam.

[0005] Furthermore, the steering member includes an annular track, a ball and a bearing cover; the annular track is arranged at the center position of the first suspension beam, the ball is arranged in the annular track, the bearing cover is arranged at the center position of the second suspension beam, and the bearing cover and the second suspension beam are connected by a rotating shaft, the rotating shaft passes through the inner ring of the annular track and is surrounded by the annular track, the bearing cover can be mounted on the ball in the annular track, and can drive the bearing cover shaft to rotate through the rolling of the ball, thereby driving the second suspension beam to rotate its shaft.

[0006] Furthermore, the first suspension beam includes an annular frame and reinforcing ribs, the annular track is arranged at the center of the annular frame, one end of the reinforcing rib is connected to the annular frame, and the other end is connected to the outer ring of the annular track, forming a structure radiating outward with the annular track as the center.

[0007] Furthermore, auxiliary frames are provided at both ends of the first hanging beam, and the auxiliary frames are provided with first lifting ears for connecting the first hanging beam to the crane.

[0008] Furthermore, the second lifting beam is provided with a second lifting lug for connecting the material to be lifted.

[0009] Furthermore, after the two ends of the first hanging beam are connected to the crane, the distance between the two cranes is greater than the distance of the space required for the second hanging beam axis to rotate.

[0010] Furthermore, the second suspension beam includes a rectangular frame and a plurality of inner supports, the first ends of the plurality of inner supports are connected together with the center of the rectangular frame as a node, the second ends of the plurality of inner supports are connected to the rectangular frame in turn, the angles between each group of two adjacent inner supports are the same, and the rotating shaft is connected to the center position of the second suspension beam, that is, connected to the connection point of the first ends of the plurality of inner supports.

[0011] Furthermore, the rotating shaft is a cylinder, the bearing cover is an annular disk and is arranged along the outer ring of the cylinder. The annular disk is provided with a plurality of reinforcing strips, and the plurality of reinforcing strips are arranged in sequence around the cylinder, which can enhance the mechanical strength of the bearing cover.

[0012] The double-trolley lifting system in an ore-heating furnace provided by the present invention has the following advantages: the lifting system adopts a lifting beam device and two cranes to solve the problem that during the lifting process of high-temperature silos such as ore-heating furnaces, the traditional lifting method is limited by the factory structure, the crane cannot operate normally, and the weight of a single production crane cannot meet the lifting operation. The lifting beam can be used to make the two cranes bear the force together. When the lifting operation surface is satisfied, different auxiliary lifting poles can be welded according to the weight of the hoisted object. The middle steering device of the lifting beam is provided with a ball bearing, and the middle steering device can make the bottom lifting beam perform steering work through the bearing cover; the double-trolley lifting system makes the lifting operation simpler and can be retained after use for continued use in production lifting.

[0013] Another aspect of the present invention further provides a double-trolley lifting method in a submerged arc furnace, using the double-trolley lifting system described in any of the above double-trolley lifting systems, including the following operations: Preparation work: calculate the total load capacity of the two cranes, and the weight of the object to be hoisted must be less than or equal to the total load capacity of the two cranes; Manufacturing of the lifting beam device: design and manufacture the first lifting beam, the second lifting beam and the steering parts according to the total load of the two cranes, and manufacture the lifting device; Test lifting: connect the lifting beam device between two cranes and conduct a test lift; During hoisting, two cranes smoothly lift the heavy equipment to be hoisted above the installation location under the same command, and rotate the second hoisting beam by pulling the rope to adjust the equipment to the appropriate direction.

[0014] Furthermore, during the trial lifting process, the heavy equipment to be lifted is hung on the second lifting beam, and a pull rope is hung on the heavy equipment to adjust the direction of the equipment, and then it is slowly lifted 100-200mm, and then the various driving hooks and other places are quickly checked to see if they meet the requirements.

[0015] The present invention provides a double-crane lifting method in an ore-heating furnace, which adopts a lifting beam device in conjunction with two cranes to lift objects. The operation is simple and the device can be reused, which can solve the dilemma of the traditional lifting method that the crane cannot operate normally due to the limitation of the factory building structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A schematic diagram of the overall structure of a beam suspension device provided in an embodiment of the present invention; Figure 2A schematic structural diagram of a first suspension beam provided in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a second suspension beam provided in an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a steering member provided in an embodiment of the present invention; Figure 5 A front view structural schematic diagram of a hanging device provided in an embodiment of the present invention; 1. first hanging beam, 2. second hanging beam, 3. steering member; 11. annular frame, 12. reinforcing ribs, 13. auxiliary frame, 14. first lifting ear, 21. rectangular frame, 22. inner support, 23. second lifting ear, 31. annular track, 32. ball bearing, 33. bearing cover, 34. rotating shaft. DETAILED DESCRIPTION

[0017] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] See also Figure 1-5 As shown, it is a double crane lifting system in an electric arc furnace disclosed in an embodiment of the present invention, including two cranes and a beam device matched with each other in the electric arc furnace; the beam device includes a first beam 1, a second beam 2 and a steering member 3, the center positions of the first beam 1 and the second beam 2 are coaxially connected through the steering member 3, the second beam 2 can rotate axially with the first beam 1 as a reference, the two ends of the first beam 1 are respectively connected to a crane, the second beam 2 is used to connect the material to be hoisted and perform hoisting operations, during the hoisting operation, the second beam 2 can be rotated relative to the first beam 1 through the steering member 3, so as to steer the hoisting of the material hoisted by the second beam 2.

[0019] Reference Figure 2-4As shown, the steering member 3 includes an annular track 31, a ball 32 and a bearing cover 33; the annular track 31 is arranged at the center position of the first suspension beam 1, and the ball 32 is arranged in the annular track 31. In this embodiment, 120 balls are arranged in the annular track, and the bearing cover 33 is arranged at the center position of the second suspension beam 2, and the bearing cover 33 is connected to the second suspension beam 2 through a rotating shaft 34, and the rotating shaft 34 passes through the inner ring of the annular track 31 and is surrounded by the annular track 31. The bearing cover 33 can be mounted on the ball 32 in the annular track 31, and can drive the bearing cover 33 to rotate by the rolling of the ball 32, thereby driving the second suspension beam 2 to rotate.

[0020] Reference Figure 1-2 As shown, the first suspension beam 1 includes an annular frame 11 and reinforcing ribs 12. The annular track 31 is arranged at the center of the annular frame 11. One end of the reinforcing rib 12 is connected to the annular frame 11, and the other end is connected to the outer ring of the annular track 31, forming a structure radiating outward with the annular track 31 as the center. In this embodiment, the annular frame 11 is an octagonal annular frame, which is connected by 8 reinforcing ribs.

[0021] Continue to refer to Figure 1-2 As shown, auxiliary frames 13 are provided at both ends of the first suspension beam 1, and first lifting ears 14 are provided on the auxiliary frames 13 for connecting the first suspension beam 1 to the crane.

[0022] Reference Figure 1 , 3 As shown, the second lifting beam 2 is provided with a second lifting lug 23 for connecting the material to be lifted.

[0023] In this embodiment, after the two ends of the first hanging beam 1 are connected to the crane, the distance between the two cranes is greater than the space required for the axis rotation of the second hanging beam 2.

[0024] Reference Figure 1 , 3 As shown, the second suspension beam 2 includes a rectangular frame 21 and a plurality of inner supports 22, the first ends of the plurality of inner supports 22 are connected together with the center of the rectangular frame 21 as a node, the second ends of the plurality of inner supports 22 are connected to the rectangular frame 21 in sequence, the angles between each group of two adjacent inner supports 22 are the same, and the rotating shaft 34 is connected to the center position of the second suspension beam 2, that is, connected to the connection point of the first ends of the plurality of inner supports 22.

[0025] Reference Figure 1 , 3-5, the rotating shaft 34 is a cylinder, the bearing cover 33 is an annular disk, and is arranged along the outer ring of the cylinder. A plurality of reinforcing strips are provided on the annular disk, and a plurality of the reinforcing strips are arranged in sequence around the cylinder, which can enhance the mechanical strength of the bearing cover 33.

[0026] A double-trolley lifting system in an electric arc furnace disclosed in an embodiment of the present invention has the following advantages: the lifting system adopts a lifting beam device and two cranes to solve the problem that during the lifting process of high-temperature silos such as electric arc furnaces, the crane cannot operate normally due to the limitation of the factory structure by the traditional lifting method, and the weight of a single production crane cannot meet the lifting operation. The lifting beam can be used to make the two cranes bear the force together. When the lifting operation surface is met, different auxiliary lifting poles can be welded according to the weight of the hoisted object; and the middle steering device of the lifting beam is provided with a ball, and the middle steering device can make the bottom lifting beam perform steering work through the bearing; the double-trolley lifting system makes the lifting operation simpler and can be retained after use for continued use in production lifting.

[0027] Another aspect of the embodiment of the present invention further provides a double-trolley lifting method in a submerged arc furnace, using the double-trolley lifting system described in any of the above items, including the following operations: Preparation work: calculate the total load capacity of the two cranes, and the weight of the object to be hoisted must be less than or equal to the total load capacity of the two cranes; Manufacturing of the lifting beam device: design and manufacture the first lifting beam, the second lifting beam and the steering parts according to the total load of the two cranes, and manufacture the lifting device; Test lifting: connect the lifting beam device between two cranes and conduct a test lift; During hoisting, two cranes smoothly lift the heavy equipment to be hoisted above the installation location under the same command, and rotate the second hoisting beam by pulling the rope to adjust the equipment to the appropriate direction.

[0028] Furthermore, during the trial lifting process, the heavy equipment to be lifted is hung on the second lifting beam, and a pull rope is hung on the heavy equipment to adjust the direction of the equipment, and then it is slowly lifted 100-200mm, and then the various driving hooks and other places are quickly checked to see if they meet the requirements.

[0029] The specific lifting process is as follows: Step 1: Preparation, calculate the total load capacity of the two cranes, and require that the weight of the heavy object to be hoisted is ≤ the total load capacity of the two cranes; Step 2: Design ideas: design and manufacture the first and second hanging beams according to the total load of the two cranes, and select appropriate balls and bearing caps; Step 3: Test lifting. Hang the heavy equipment to be hoisted on the second lifting beam, and hang a pull rope on the heavy equipment to facilitate the adjustment of the direction of the equipment. Then slowly lift it 100-200mm, and then quickly check whether there are any abnormalities in the driving hooks and other places. After the inspection is completed, the heavy equipment can be lifted again; Step 4: Start lifting. The two cranes will smoothly lift the heavy equipment to the installation location under the same command. The second lifting beam will be rotated by pulling the rope to adjust the equipment to the appropriate direction. Step 5: After the lifting is completed, the two cranes are lowered in coordination to safely place the heavy equipment in the specified location.

[0030] The embodiment of the present invention discloses a double-crane lifting method in an electric arc furnace. Two cranes are parked side by side, and the crane guide chain hooks are respectively connected to the lifting ears on the first lifting beam. The lifting ears under the second lifting beam are connected to the equipment or the materials to be lifted. The two cranes can lift equipment or materials with heavier weight and can perform lifting operations. This method is fast and quick, and the steering of the equipment can be adjusted during the lifting process. The auxiliary lifting beams can be reused, which can save a lot of costs and has excellent work convenience.

[0031] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0032] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A double crane lifting system in a submerged arc furnace, characterized in that: It includes a traveling crane and a beam hanging device that are matched with two ore furnaces; the beam hanging device includes a first beam, a second beam and a steering member, the center positions of the first beam and the second beam are coaxially connected through the steering member, the second beam can rotate axially with the first beam as the reference, the two ends of the first beam are respectively connected to a traveling crane, the second beam is used to connect the material to be hoisted and perform hoisting operations, during the hoisting operation, the second beam can be rotated relative to the first beam through the steering member, thereby steering the hoisting of the material hoisted by the second beam.

2. The double crane lifting system in a submerged arc furnace according to claim 1, characterized in that: The steering member includes an annular track, a ball and a bearing cover; the annular track is arranged at the center position of the first suspension beam, the ball is arranged in the annular track, the bearing cover is arranged at the center position of the second suspension beam, and the bearing cover and the second suspension beam are connected by a rotating shaft, the rotating shaft passes through the inner ring of the annular track and is surrounded by the annular track, the bearing cover can be mounted on the ball in the annular track, and can drive the bearing cover shaft to rotate through the rolling of the ball, thereby driving the second suspension beam to rotate its shaft.

3. The double crane lifting system in a submerged arc furnace according to claim 2, characterized in that: The first suspension beam includes an annular frame and reinforcing ribs. The annular track is arranged at the center of the annular frame. One end of the reinforcing rib is connected to the annular frame, and the other end is connected to the outer ring of the annular track, forming a structure radiating outward with the annular track as the center.

4. The double crane lifting system in a submerged arc furnace according to claim 1, characterized in that: Auxiliary frames are provided at both ends of the first hanging beam, and first lifting ears are provided on the auxiliary frames for connecting the first hanging beam to the crane.

5. The double crane lifting system in a submerged arc furnace according to claim 1, characterized in that: The second lifting beam is provided with a second lifting lug for connecting the material to be lifted.

6. The double crane lifting system in a submerged arc furnace according to claim 1, characterized in that: After both ends of the first hanging beam are connected to the crane, the distance between the two cranes is greater than the space required for the second hanging beam axis to rotate.

7. The double crane lifting system in a submerged arc furnace according to claim 2, characterized in that: The second suspension beam includes a rectangular frame and multiple internal supports. The first ends of the multiple internal supports are connected together with the center of the rectangular frame as a node. The second ends of the multiple internal supports are connected to the rectangular frame in turn. The angles between each group of adjacent two internal supports are the same. The rotating shaft is connected to the center position of the second suspension beam, that is, it is connected to the connection point of the first ends of the multiple internal supports.

8. The double crane lifting system in a submerged arc furnace according to claim 2, characterized in that: The rotating shaft is a cylinder, the bearing cover is an annular disk, and is arranged along the outer ring of the cylinder. A plurality of reinforcing strips are provided on the annular disk, and the plurality of reinforcing strips are arranged in sequence around the cylinder to enhance the mechanical strength of the bearing cover.

9. A double crane lifting method in a submerged arc furnace, characterized in that: The double-trolley lifting system according to any one of claims 1 to 8 includes the following operations: Preparation work: calculate the total load capacity of the two cranes, and the weight of the object to be hoisted must be less than or equal to the total load capacity of the two cranes; Manufacturing of the lifting beam device: design and manufacture the first lifting beam, the second lifting beam and the steering parts according to the total load of the two cranes, and manufacture the lifting device; Test lifting: connect the lifting beam device between two cranes and perform a test lift; During hoisting, two cranes, under the same command, steadily lift the heavy equipment to be hoisted above the installation location, and rotate the second lifting beam by pulling the rope to adjust the equipment to the appropriate direction.

10. The double crane lifting method in a submerged arc furnace according to claim 9, characterized in that: During the trial lifting process, hang the heavy equipment to be lifted on the second lifting beam, hang a pull rope on the heavy equipment to adjust the direction of the equipment, then slowly lift it 100-200mm, and then quickly check whether the various driving hooks and other places meet the requirements.

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