Steel box girder manufacturing magnetic attraction type assembly fixing device

Abstract

The utility model discloses a kind of steel box girder manufacturing magnetic attraction type assembly fixing devices, it relates to steel box girder manufacturing technical field, including magnetic base frame, hinged connection support of magnetic base frame top, the magnetic base frame is equipped with two, each side of the magnetic base frame is fixed with rotating connection seat, support one end is rotatably connected in rotating connection seat inside, two support far from magnetic base frame end hinged, rotating connection has cylindrical magnet in the magnetic base frame inside, located in the both sides of cylindrical magnet is equipped with the electromagnetic baffle welded in the both sides of magnetic base frame, cylindrical magnet side is equipped with rotating driving part;The device is used for the web of steel box girder, stiffening rib, baffle, PBL key and butt joint structure such as spliced board before welding "no code" assembly positioning, can avoid leaving "code foot", welding tumor, spatter and other defects on the surface of parent material, and can be reused.

Description

Technical Field

[0001] This utility model belongs to the field of steel box girder manufacturing technology, and in particular relates to a magnetic assembly and fixing device for steel box girder manufacturing. Background Technology

[0002] The manufacturing of steel box girder segments mainly adopts the assembly and welding process, which involves assembling first and then welding to achieve welded connections between segmental parts. Common weld types for steel box girders include T-joints, fillet welds, and butt welds. All three types require pre-assembly and positioning of the parts to be welded before welding. Assembly and positioning typically involve temporary fixing of parts using tack welding and clamping plates. For the assembly of larger parts, clamping plate positioning is essential. Without temporary support from clamping plates, the parts to be welded cannot achieve the designed positioning requirements during the assembly stage. However, clamping plates used for temporary positioning need to be removed after welding, leaving welding defects such as "clamping feet," weld beads, and spatter on the base material surface. If these defects are not thoroughly addressed, they can seriously affect the service life of subsequent coating layers. Therefore, researching suitable temporary positioning aids for "clamping-free" assembly during the assembly stage is crucial for improving the quality of steel structures.

[0003] In the assembly and construction stage before steel structure welding, a combination of tack welding and mounting plates is generally used to position parts before welding. However, traditional mounting plates need to be cut off and discarded after welding, leaving defects such as "mount feet," weld beads, and spatter on the surface of the base material. If these defects are not thoroughly treated, they will seriously affect the service life of subsequent coating layers. To address this, we propose a magnetic assembly and fixing device for steel box girder manufacturing to achieve "mount-free" assembly and construction of steel box girders. Utility Model Content

[0004] The purpose of this utility model is to provide a magnetic assembly and fixing device for manufacturing steel box girders. This device is used for "code-free" assembly and positioning of the web, stiffening ribs, diaphragms, PBL keys, and splice joints of steel box girders before welding. It can avoid leaving defects such as "code feet", weld beads, and spatter on the surface of the base material, and can be reused.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A magnetic assembly and fixing device for manufacturing steel box girders includes a magnetic base frame and a bracket hinged to the top of the magnetic base frame. Two magnetic base frames are provided, and a rotating connecting seat is fixed on one side of each magnetic base frame. One end of the bracket is rotatably connected inside the rotating connecting seat. The ends of the two brackets away from the magnetic base frames are hinged. A cylindrical magnet is rotatably connected inside the magnetic base frame. Electromagnetic partitions welded to both sides of the magnetic base frame are provided on both sides of the cylindrical magnet. A rotation drive component is provided on the side of the cylindrical magnet.

[0006] Furthermore, the bracket consists of support rods and horizontal shafts. The support rods are symmetrically arranged, and several horizontal shafts are fixed between two support rods. The end of the support rod near the rotating connecting seat is rotatably connected to both sides of the rotating connecting seat. The end of the support rod away from the rotating connecting seat is provided with a pin. The four support rods are sleeved and rotatably connected to both sides of the pin.

[0007] Furthermore, a rotary switch is threadedly connected to one side of the pin and one side of the rotary connecting seat, and the rotary switch abuts against the side of the support rod.

[0008] Furthermore, the magnetic base frame consists of two symmetrically arranged fixing blocks, with grooves on the inner side of the fixing blocks. The electromagnetic partition is welded between the two fixing blocks, and the grooves are enclosed into a circular shape after the electromagnetic partition is welded. The cylindrical magnet rotates inside the two grooves.

[0009] Furthermore, one end of the magnetic base frame is provided with a cover, the middle of the cover is provided with a through hole for the cylindrical magnet to pass through, and the end of the cover away from the magnetic base frame is provided with a rotating adjustment block. The rotating adjustment block is provided with a symmetrical arc groove. The rotating adjustment block and the cover are screwed to the end of the magnetic base frame in sequence.

[0010] Furthermore, the rotating adjustment block is fixed with a plug plate facing the end of the cover, and the cylindrical magnet is provided with a plug groove facing the end of the cover. The plug plate and the plug groove are interference-fitted. The rotating adjustment block is fixed with a rotating handle on the side away from the plug plate, and the selection handle is provided with an indicator arrow.

[0011] Furthermore, the side of the cover is provided with an "ON / OFF" indicator, and the arc groove is set at 90°.

[0012] In summary, the beneficial technical effects of this utility model are as follows: This device is used for "code-free" assembly and positioning of structures such as the web, stiffening ribs, partitions, PBL keys, and splice joints of steel box girders before welding. Specifically, it utilizes a rotatable cylindrical magnet, which can be freely adjusted to rotate within the magnetic base frame, controlling the magnetization and demagnetization of the magnetic base frame. This allows it to adhere to or detach from the surface of the steel box girder, achieving flexible assembly and positioning operations. Furthermore, the device's support structure uses a hinged connection, allowing the angle between the two magnetic base frames to be flexibly adjusted to adapt to the assembly requirements of steel box girder structures of different shapes and sizes. Overall, it avoids leaving defects such as "code feet," weld beads, and spatter on the base material surface and is reusable. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a magnetic assembly and fixing device for manufacturing steel box girders according to this embodiment; Figure 2 This embodiment describes a magnetic assembly and fixing device for manufacturing steel box girders. Figure 1 Top view diagram; Figure 3 This embodiment describes a magnetic assembly and fixing device for manufacturing steel box girders. Figure 1 A side view; Figure 4 This is a schematic diagram of the physical structure of a magnetic assembly and fixing device for manufacturing steel box girders according to this embodiment; Figure 5 This is an exploded structural diagram of the magnetic base frame of a magnetic assembly and fixing device for manufacturing steel box girders according to this embodiment; Figure 6 This is a schematic diagram of the magnetic system of the magnetic seat of a magnetic assembly and fixing device for manufacturing steel box girders in this embodiment being in the closed state; Figure 7 This is a schematic diagram of the magnetic system of a magnetic assembly and fixing device for manufacturing steel box girders in this embodiment being in the open state; Figure 8 This is a schematic diagram of the adsorption state of a magnetic assembly and fixing device for manufacturing steel box girders according to this embodiment; Figure 9 This is a schematic diagram of the working state of a magnetic assembly and fixing device for manufacturing steel box girders in this embodiment.

[0014] In the diagram: 1. Magnetic base frame; 2. Bracket; 3. Rotary connecting seat; 4. Cylindrical magnet; 5. Electromagnetic partition; 6. Support rod; 7. Horizontal axis; 8. Pin; 9. Rotary switch; 10. Fixing block; 11. Groove; 12. Cover; 13. Rotary adjustment block; 14. Arc groove; 15. Plug plate; 16. Plug slot; 17. Rotary handle; 18. Indicating arrow; 19. "ON / OFF" indicator. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings.

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-9This utility model provides a technical solution: a magnetic assembly and fixing device for manufacturing steel box girders, including a magnetic base frame 1, a bracket 2 hinged to the top of the magnetic base frame 1, two magnetic base frames 1, each magnetic base frame 1 having a rotating connecting seat 3 fixed on one side, one end of the bracket 2 being rotatably connected inside the rotating connecting seat 3, the two brackets 2 being hinged at the ends away from the magnetic base frame 1, a cylindrical magnet 4 being rotatably connected inside the magnetic base frame 1, electromagnetic partitions 5 welded to both sides of the magnetic base frame 1 located on both sides of the cylindrical magnet 4, and a rotating drive component on the side of the cylindrical magnet 4.

[0018] The bracket 2 consists of support rods 6 and horizontal shafts 7. The support rods 6 are symmetrically arranged, and several horizontal shafts 7 are fixed between two support rods 6. The end of the support rod 6 near the rotating connecting seat 3 is rotatably connected to both sides of the rotating connecting seat 3. The end of the support rod 6 away from the rotating connecting seat 3 is provided with a pin 8. Four support rods 6 are sleeved and rotatably connected to both sides of the pin 8. Two symmetrical support rods 6 are welded together by several horizontal shafts 7 to form the bracket 2. A rotary switch 9 is threadedly connected to one side of the pin 8 and one side of the rotating connecting seat 3. The rotary switch 9 abuts against the side of the support rod 6. After the rotary switch 9 is screwed into the side of the support rod 6, the inner side of the support rod 6 abuts against the side of the rotating connecting seat 3 or at the pin 8. The two inner and outer support rods 6 abut against each other, thereby fixing the opening and closing angle of the two brackets 2. The free screwing in and out of the rotary switch 9 can fix the two brackets 2 at any angle within 0-180°.

[0019] In this embodiment, the magnetic base frame 1 is made of electromagnetic soft iron material, and the electromagnetic partition 5 is made of brass. Specifically, the magnetic base frame 1 consists of two symmetrically arranged fixing blocks 10. The inner side of the fixing block 10 is provided with a groove 11. The electromagnetic partition 5 is welded between the two fixing blocks 10. After the electromagnetic partition 5 is welded, the groove 11 is surrounded into a circular shape. The cylindrical magnet 4 rotates inside the two grooves 11. The magnetic base frame 1 made of electromagnetic soft iron material has strong magnetic conductivity under the action of an external magnetic field. After the external magnetic field disappears, the electromagnetic soft iron can be demagnetized quickly. The brass has extremely poor magnetic conductivity and plays the role of blocking the transmission of magnetic force in this utility model.

[0020] The diameter of the reserved cylindrical space enclosed by the two grooves 11 is slightly larger than the diameter of the cylindrical magnet 4 by 1mm, so that the cylindrical magnet 4 can be placed in it and rotated, thereby forming a switchable magnetic system of the magnetic base.

[0021] A cover 12 is provided at one end of the magnetic base frame 1. A through hole is provided in the middle of the cover 12 for the cylindrical magnet 4 to pass through. A rotating adjustment block 13 is provided at the end of the cover 12 away from the magnetic base frame 1. A circularly symmetrical arc groove 14 is provided on the rotating adjustment block 13. The rotating adjustment block 13 and the cover 12 are screwed to the end of the magnetic base frame 1 in sequence.

[0022] A plug plate 15 is fixed to the end of the rotating adjustment block 13 facing the cover 12. A plug groove 16 is provided on the end of the cylindrical magnet 4 facing the cover 12. The plug plate 15 and the plug groove 16 are interference-fitted. A rotating handle 17 is fixed to the side of the rotating adjustment block 13 away from the plug plate 15. An indicator arrow 18 is provided on the selection handle. Through the plug-in connection between the plug plate 15 and the plug groove 16, the rotating adjustment block 13 and the cylindrical magnet 4 are integrated into one structure. When the adjustment block is rotated, the cylindrical magnet 4 can rotate accordingly. Specifically, the indicator arrow 18 is "》》》".

[0023] The cover 12 has an "ON / OFF" indicator 19 on its side, and the arc groove 1490° is provided.

[0024] The working principle of this utility model is as follows: When the indicator arrow 18 ">>>" on the handle of the rotating adjustment device points to OFF, the magnetic system of the magnetic base is in the off state. At this time, the magnetic base is not magnetic, and the fixing device cannot be attached to the outer surface of the steel structure. The principle is as follows: Figure 6 As shown, the cylindrical magnet 4 is divided into equal N and S poles along its diameter. When the ">>>" mark points to OFF, the diameter is perpendicular to the electromagnetic partition 5. At this time, the magnetic fields of the N and S poles form a closed loop in the magnetic base frame 1 on both sides, which is internally separated by the electromagnetic partition 5. The magnetic force circulates internally, and there is no external magnetic force. When the ">>>" mark on the rotary adjustment device points to ON, the magnetic system of the magnetic base is in the open state. At this time, the magnetic base is magnetic, and the fixing device can be adsorbed onto the outer surface of the steel structure. The principle is as follows. Figure 7 , 8 As shown, the cylindrical magnet 4 is divided into equal N and S poles along its diameter. When the ">>>" sign points to ON, this diameter coincides with the electromagnetic partition 5. At this time, the N and S magnetic fields separated by the electromagnetic partition 5 inside the magnetic system cannot achieve closure, as... Figure 8 As shown; in this state, when the magnetic base is placed on the outer surface of the steel structure, the magnetic fields of the N and S poles can be closed by bypassing the electromagnetic partition 5 through the external steel structure medium, as shown. Figure 9 As shown, the magnetic base has magnetic force at this time, and this utility model can realize the adsorption function.

[0025] In practical implementation, one of the magnetic base frames 1 is placed on the surface of the steel structure base material, and the ">>>" mark on the rotation adjustment device is pointed to ON. At this time, the first magnetic base frame 1 is firmly attached to the steel structure. Then, with the rotary switch 9 not tightened, the angle of this utility model is adjusted. Finally, by adjustment, the second magnetic base frame 1 is placed on the outer surface of the positioned part to be welded. Then, the ">>>" mark on the rotation adjustment device on the second magnetic base frame 1 is turned from OFF to ON. At this time, the "code-free" assembly construction of the steel structure part to be welded is realized. After welding is completed, the ">>>" marks on the rotation adjustment devices on both magnetic base frames 1 are turned from ON to OFF. At this time, this utility model can be disassembled without leaving defects on the surface of the base material and can be reused repeatedly.

[0026] This utility model takes the Guijiang Grand Bridge of the Pingluo-Lipu Highway, a parallel line under construction from Quanzhou (Hunan-Guangxi border) to Rongxian (Guangdong-Guangxi border), as its technical background, and explains how this utility model can achieve "code-free" assembly construction in the welding construction of web plates, stiffening ribs, diaphragms, PBL keys, and splice plate butt joint structures of steel box girders.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A magnetic assembly and fixing device for manufacturing steel box girders, characterized in that, The device includes a magnetic base frame (1) and a bracket (2) hinged to the top of the magnetic base frame (1). There are two magnetic base frames (1). Each magnetic base frame (1) has a rotating connecting seat (3) fixed on one side. One end of the bracket (2) is rotatably connected inside the rotating connecting seat (3). The two brackets (2) are hinged at the ends away from the magnetic base frames (1). A cylindrical magnet (4) is rotatably connected inside the magnetic base frame (1). Electromagnetic partitions (5) are welded to both sides of the magnetic base frame (1) on both sides of the cylindrical magnet (4). A rotating drive component is provided on the side of the cylindrical magnet (4).

2. The magnetic assembly and fixing device for manufacturing steel box girders according to claim 1, characterized in that, The bracket (2) consists of support rods (6) and horizontal shafts (7). The support rods (6) are symmetrically arranged, and several horizontal shafts (7) are fixed between the two support rods (6). The end of the support rod (6) near the rotating connecting seat (3) is rotatably connected to both sides of the rotating connecting seat (3). The end of the support rod (6) away from the rotating connecting seat (3) is provided with a pin (8). The four support rods (6) are sleeved and rotatably connected to both sides of the pin (8).

3. The magnetic assembly and fixing device for manufacturing steel box girders according to claim 2, characterized in that, A rotary switch (9) is threadedly connected to one side of the pin (8) and the other side of the rotary connecting seat (3), and the rotary switch (9) abuts against the side of the support rod (6).

4. The magnetic assembly and fixing device for manufacturing steel box girders according to claim 1, characterized in that, The magnetic base frame (1) consists of two symmetrically arranged fixing blocks (10). The fixing blocks (10) have grooves (11) on their inner sides. The electromagnetic partition (5) is welded between the two fixing blocks (10). After the electromagnetic partition (5) is welded, the grooves (11) are enclosed in a circular shape. The cylindrical magnet (4) rotates inside the two grooves (11).

5. The magnetic assembly and fixing device for manufacturing steel box girders according to claim 1, characterized in that, The magnetic base frame (1) has a cover (12) at one end, and a through hole in the middle of the cover (12) for the cylindrical magnet (4) to pass through. The end of the cover (12) away from the magnetic base frame (1) has a rotating adjustment block (13), and the rotating adjustment block (13) has a symmetrical arc groove (14). The rotating adjustment block (13) and the cover (12) are screwed to the end of the magnetic base frame (1) in sequence.

6. The magnetic assembly and fixing device for manufacturing steel box girders according to claim 5, characterized in that, The rotating adjustment block (13) is fixed with a plug plate (15) facing the end of the cover (12), and the cylindrical magnet (4) is provided with a plug groove (16) facing the end of the cover (12). The plug plate (15) and the plug groove (16) are interference-fitted. The rotating adjustment block (13) is fixed with a rotating handle (17) away from the plug plate (15), and the selection handle is provided with an indicator arrow (18).

7. The magnetic assembly and fixing device for manufacturing steel box girders according to claim 5, characterized in that, The cover (12) has an "ON / OFF" indicator (19) on its side, and the arc groove (14) is set at 90°.

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