Automatic flipping equipment for large bridge steel components

Abstract

The present invention discloses an automatic flipping device for a large bridge steel member, comprising a first flipping mechanism installed on one side and a second flipping mechanism installed on the other side, wherein the first flipping mechanism and the second flipping mechanism both comprise an arc-shaped base and a driving motor installed on the arc-shaped base; a bridge steel member is placed inside the arc-shaped base, and a driving wheel is connected to the end transmission of the driving motor; a chain is sleeved on the driving wheel, and the chain is wound around the bridge steel member inside the arc-shaped base and the driving wheel in sequence; the driving motor drives the driving wheel to rotate the chain, thereby driving the bridge steel member inside the arc-shaped base to flip inside the arc-shaped base; the automatic flipping device provided by the present invention can flip the steel member 360°, flip it to any angle, and fix it according to the needs of welding; it provides great convenience for welding and saves lifting resources, and can also prevent the occurrence of lifting injury accidents.

Description

Technical Field

[0001] The invention relates to the technical field of turning over large bridge steel components, and in particular to automatic turning over equipment for large bridge steel components. Background Art

[0002] At present, the steel bridge manufacturing industry needs to turn over the steel bridge during the production process in the steel bridge factory to avoid welding on the back. After turning over, flat welding can be used, which is easier to operate, saving labor costs and ensuring welding quality. Due to the lack of special turning equipment for steel bridges, and the limitations of vehicle transportation length and the bridge section of the production workshop, the factory basically uses two large-tonnage bridge cranes to cooperate in turning on the ground: one slowly lifts the hook, and the other slowly releases the hook.

[0003] This kind of flipping can easily cause the steel bridge to twist and deform. During the operation, the steel bridge must be pulled and pulled diagonally to slowly flip over, which can easily cause the crane wire rope to come out of the groove and break. Because the steel bridge is not circular, the two cranes are not synchronized during the flipping process (manual operation is inevitable), which can easily cause a huge impact force, causing the crane to derail or be damaged, posing a great safety risk. At the same time, the oblique pulling and pulling of the crane seriously violates the "Ten No-Lifting" regulations for cranes and is a serious illegal operation.

[0004] This factory turning method causes the steel bridge to twist and deform, which may not only cause local welds of the components to tear or burst, but also lead to misalignment of the joints during construction and installation. The large deformation is difficult to correct, bringing a series of problems to the installation and construction of the steel bridge. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art that steel components may be twisted and deformed and welds may be torn when they are flipped, and to provide an automatic flipping device for large bridge steel components. The automatic flipping device can flip the steel components 360° to any angle and fix them according to the needs of welding; it provides great convenience for welding and saves lifting resources, and can also prevent the occurrence of lifting injury accidents.

[0006] To achieve the above-mentioned purpose, the present invention provides an automatic flipping device for large-scale bridge steel components, including a first flipping mechanism installed on one side and a second flipping mechanism installed on the other side, wherein the first flipping mechanism and the second flipping mechanism both include an arc-shaped base and a driving motor installed on the arc-shaped base; a bridge steel component is placed inside the arc-shaped base, and a driving wheel is connected to the end transmission of the driving motor; a chain is sleeved on the driving wheel, and the chain is sequentially wound around the bridge steel component inside the arc-shaped base and the driving wheel; the driving motor drives the driving wheel to rotate the chain, thereby driving the bridge steel component inside the arc-shaped base to flip inside the arc-shaped base.

[0007] Preferably, the arc base is provided with a first arc groove on both sides, and a second arc groove is provided on one side of the first arc groove; the first arc groove is provided with a third arc groove for accommodating the end of the cylindrical roller, the cylindrical roller includes a first cylindrical roller and a second cylindrical roller, the first cylindrical roller and the second cylindrical roller are arranged in a cycle in sequence, the first cylindrical roller includes a first cylinder and a second cylinder arranged in the middle, the second cylindrical roller includes a first cylinder and a third cylinder arranged at both ends of the first cylinder, and the second cylinder is inserted between the two third cylinders; the two ends of the first cylinder are inserted into the third arc groove, and the second arc groove is used to accommodate the second cylinder and the third cylinder; the second cylinder and the third cylinder are higher than the arc base and are in direct contact with the bridge steel structure.

[0008] Preferably, an arc-shaped strip is installed on the first arc-shaped groove, a fourth arc-shaped groove is provided inside the arc-shaped strip, the fourth arc-shaped groove is used to cover the upper surface of the first cylinder, the arc-shaped strip is fixed to the first arc-shaped groove by bolts, and limits the cylindrical roller.

[0009] Preferably, a tensioning wheel is also installed on the arc-shaped base, a driving wheel is installed on one end of the arc-shaped base, and a tensioning wheel is installed on the other end, chains are sleeved on the driving wheel and the tensioning wheel, the tensioning wheel tightens the chain, and the driving wheel drives the tensioning wheel to rotate through the chain.

[0010] Preferably, the arc base includes a first arc base installed on one side and a second arc base installed on the other side, the first arc base and the second arc base are connected together by a plurality of connecting screws; the drive motor is installed inside the second arc base, the end of the drive motor passes through the second arc base and is equipped with a driving wheel; a driving wheel is installed at one end of the second arc base, and a tensioning wheel is installed at the other end.

[0011] Preferably, cylindrical guide wheels are installed at both ends of the arc-shaped base, and the cylindrical guide wheels are in contact with the side surfaces of the bridge steel components and guide the bridge steel components to flip.

[0012] Preferably, a sliding wheel is installed between the driving wheel and the tensioning wheel, and the sliding wheel is installed at the lower part of the chain for supporting the chain. Limiting protrusions are provided on both sides of the sliding wheel to limit the chain between the two limiting protrusions.

[0013] Preferably, a slide groove is provided in the second arc-shaped base, and a wheel axle connected to the tensioning wheel is provided in the slide groove. The side of the wheel axle is transmission-connected to the adjusting screw, and the adjusting screw is rotated to drive the wheel axle to slide inside the slide groove, so that the tensioning wheel tightens the chain.

[0014] Preferably, the surfaces of the driving wheel and the tensioning wheel are provided with grooves for accommodating the chain, thereby driving the chain to rotate; the ends of the chain are fixedly connected together using docking lock rings to form a closed chain.

[0015] Preferably, a motor mounting hole is provided on the second arc-shaped base, and the drive motor is inserted into the motor mounting hole; a plurality of fixing bolts for fixing the drive motor are installed on the side of the second arc-shaped base; a plurality of vents are installed on the side of the second arc-shaped base, and the vents are communicated with the drive motor; the drive motor is connected to the driving wheel through a plurality of keys, and the drive motor has a brake self-locking function and is electrically connected to a synchronizer, and the synchronizer drives the two drive motors to rotate synchronously, thereby realizing synchronous flipping of both ends of the bridge steel structure.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The automatic flipping device of the present invention, when in use, the first flipping mechanism and the second flipping mechanism are used in combination and placed side by side; the bridge steel member is placed inside the arc-shaped base, and the chain is sequentially wound around the bridge steel member and the driving wheel inside the arc-shaped base; wherein, in order to improve the stability of the flipping process, the bridge steel member must be wound around for one circle; the drive motor is started, and the drive motor drives the driving wheel to rotate, so that the chain rotates, thereby driving the bridge steel member inside the arc-shaped base to flip; the above-mentioned flipping can flip the bridge steel member 360° according to the needs of welding, flip it to any angle, and fix it; it provides great convenience for welding and saves lifting resources, and can also prevent the occurrence of lifting injury accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a large-scale bridge steel member automatic turning device provided by the present invention and a bridge steel member installed together;

[0020] Figure 2 is a structural schematic diagram of a second flipping mechanism provided by the present invention;

[0021] Figure 3 is a schematic structural diagram of a first arc-shaped base provided by the present invention;

[0022] Figure 4is a front schematic diagram of a second arc-shaped base provided by the present invention;

[0023] Figure 5 is a partially enlarged schematic diagram of the back side of the second arc-shaped base provided by the present invention;

[0024] Figure 6 It is an exploded schematic diagram of the second arc-shaped base and the driving motor provided by the present invention;

[0025] Figure 7 It is a structural schematic diagram of a cylindrical roller provided by the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the arc-shaped layering strip provided by the present invention;

[0027] Fig. 9 It is a structural schematic diagram of the driving wheel provided by the present invention;

[0028] Fig.10 It is a structural schematic diagram of the sliding wheel provided by the present invention.

[0029] Included in the figure are:

[0030] 1. First flip mechanism; 2. Second flip mechanism; 3. Arc base; 4. Driving motor; 5. Bridge steel member; 6. Driving wheel; 8. Chain; 7. Tensioning wheel; 31. First arc base; 32. Second arc base; 33. Connecting screw; 311. First arc groove; 312. Second arc groove; 314. Third arc groove; 315. First cylindrical roller; 316. Second cylindrical roller; 3151. First cylinder; 3152. Second cylinder; 3162. Third cylinder; 317. Arc pressure strip; 3171. Fourth arc groove; 35. Cylindrical guide wheel; 9. Sliding wheel; 91. Limiting protrusion; 321. Slide groove; 71. Wheel axle; 72. Adjusting screw; 322. Motor mounting hole; 323. Fixing bolt; 324. Ventilation port; 313. Cylindrical roller. DETAILED DESCRIPTION

[0031] The technical scheme in this embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in this embodiment of the present invention. Obviously, the described embodiment is one embodiment of the present invention, not all embodiments of the present invention. Based on this embodiment of the present invention, all other embodiments of the present invention obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Please refer to Figures 1 to 10 The present invention provides an automatic flipping device for large bridge steel components.

[0033] like Figure 1As shown, the automatic flipping device includes a first flipping mechanism 1 installed on one side and a second flipping mechanism 2 installed on the other side. The first flipping mechanism 1 and the second flipping mechanism 2 have the same structure, and when in use, the first flipping mechanism 1 and the second flipping mechanism 2 are used in conjunction with each other and placed side by side; the bridge steel member 5 is placed between the first flipping mechanism 1 and the second flipping mechanism 2, and is supported by the first flipping mechanism 1 and the second flipping mechanism 2. When placed, a certain end portion can be reserved outside, which is beneficial for support and later flipping force.

[0034] like Figure 1 As shown, the first flipping mechanism 1 and the second flipping mechanism 2 both include an arc-shaped base 3, which is a semicircular structure and is used to place a bridge steel member 5 inside. Both ends of the bridge steel member 5 are placed inside the arc-shaped base 3 for stable support, which is convenient for subsequent flipping.

[0035] like Figure 6 As shown, a driving motor 4 is installed at the lower part of the arc-shaped base 3; the end of the driving motor 4 is connected to the driving wheel 6 through transmission; in this embodiment, the driving motor 4 is directly connected to the driving wheel 6 through four keys, and the keys are adapted to the key pins on the driving motor 4 and are 90° to each other to ensure that the driving wheel 6 and the driving motor 4 run synchronously.

[0036] like Figure 6 As shown, a chain 8 is sleeved on the driving wheel 6, and a groove for accommodating the chain 8 is provided on the surface of the driving wheel 6, thereby driving the chain 8 to rotate. In other embodiments, gears and chains can also be used for power transmission.

[0037] like Figure 1 and Figure 6 As shown, the chain 8 is sequentially wound around the bridge steel component 5 and the driving wheel 6 inside the arc-shaped base 3; the driving motor 4 drives the driving wheel 6 to rotate the chain 8, thereby driving the bridge steel component 5 inside the arc-shaped base 3 to flip inside the arc-shaped base 3, thereby adjusting the angle of the bridge steel component 5 and flipping the unwelded weld at the bottom to the upper part, which is convenient for subsequent welding.

[0038] In order to facilitate the tensioning of the chain 8, a tensioning wheel 7 is also installed on the arc base 3. In this embodiment, the driving wheel 6 is installed at one end of the arc base 3, and the tensioning wheel 7 is installed at the other end of the arc base 3. At the same time, the driving wheel 6 and the tensioning wheel 7 are both provided with a chain 8. The settings of the two ends of the driving wheel 6 and the tensioning wheel 7 facilitate the tensioning of the chain 8. The driving wheel 6 drives the tensioning wheel 7 to rotate through the chain 8.

[0039] like Figure 2As shown, the interior of the arc base 3 is semicircular, and the bridge steel member 5 will generate greater friction when flipping inside the arc base 3, thereby requiring a greater driving force. In order to reduce the friction generated by flipping, thereby reducing energy consumption and driving force; this embodiment uses a number of cylindrical rollers 313 to support the bridge steel member 5, so that the bridge steel member 5 does not generate friction with the interior of the arc base 3, thereby reducing energy consumption and ensuring the stability of the placement of the arc base 3 during the flipping process.

[0040] Specifically, Figure 4 As shown, if the arc base 3 is an integrated component, first arc grooves 311 are provided on both sides of the arc base 3, and second arc grooves 312 are provided inside the two first arc grooves 311; the first arc groove 311 is provided with a third arc groove 314 for accommodating the end of the cylindrical roller 313, and the second arc groove 312 is used to accommodate the middle of the cylindrical roller 313.

[0041] like Figure 2 and Figure 7 As shown, there are multiple cylindrical rollers 313, which are placed in sequence inside the arc base 3; the cylindrical rollers 313 include two types of rollers, namely: a first cylindrical roller 315 and a second cylindrical roller 316, and the first cylindrical roller 315 and the second cylindrical roller 316 are arranged in a cycle in sequence.

[0042] Further, such as Figure 7 As shown, the first cylindrical roller 315 includes a first cylinder 3151 and a second cylinder 3152 arranged in the middle, and the second cylindrical roller 316 includes a first cylinder 3151 and third cylinders 3162 arranged at both ends of the first cylinder 3151, and the second cylinder 3152 is inserted between the two third cylinders 3162.

[0043] Furthermore, if Figure 5 As shown, both ends of the first cylinder 3151 are inserted into the third arc-shaped groove 314, and the second arc-shaped groove 312 is used to accommodate the second cylinder 3152 and the third cylinder 3162; the second cylinder 3152 and the third cylinder 3162 are higher than the arc-shaped base 3 and are in direct contact with the bridge steel member 5.

[0044] The second cylinder 3152 and the third cylinder 3162 are in direct contact with the bridge steel member 5, converting the original line contact into a number of point contacts; further, in order to further reduce the friction, bearings may be installed inside the second cylinder 3152 and the third cylinder 3162, so that the second cylinder 3152 and the third cylinder 3162 can rotate freely during the flipping process.

[0045] The first cylindrical roller 315 and the second cylindrical roller 316 can be placed inside the arc base 3 by their own gravity, but in order to limit the cylindrical roller 313 to achieve stable placement and stable operation; Figure 8 As shown, an arc strip 317 is installed on the first arc groove 311, and a fourth arc groove 3171 is provided inside the arc strip 317. The fourth arc groove 3171 is used to cover the upper surface of the first cylinder 3151. The arc strip 317 is fixed to the first arc groove 311 by bolts and limits the cylindrical roller 313.

[0046] If the arc-shaped base 3 is a split component, it is convenient for later manufacturing and reduces the manufacturing cost; Figure 2 As shown, the arc base 3 includes a first arc base 31 installed on one side and a second arc base 32 installed on the other side, and the first arc base 31 and the second arc base 32 are connected together by a plurality of connecting screws 33.

[0047] like Figure 6 As shown, the driving motor 4 is installed inside the second arc-shaped base 32, and the end of the driving motor 4 passes through the second arc-shaped base 32 and is equipped with a driving wheel 6; the second arc-shaped base 32 is equipped with a driving wheel 6 at one end and a tensioning wheel 7 at the other end.

[0048] like Figure 6 As shown, cylindrical guide wheels 35 are installed at both ends of the first arc-shaped base 31 and the second arc-shaped base 32. The cylindrical guide wheels 35 are in contact with the side of the bridge steel member 5 and guide the bridge steel member 5 to flip.

[0049] like Figure 6 As shown, a sliding wheel 9 is installed between the driving wheel 6 and the tensioning wheel 7, and the sliding wheel 9 is installed at the lower part of the chain 8. The sliding wheel 9 is used to support the chain 8 to prevent the chain 8 from dragging on the ground during operation; further, as Fig.10 As shown, both sides of the sliding wheel 9 are provided with limiting protrusions 91 to limit the chain 8 between the two limiting protrusions 91 .

[0050] like Figure 4 and Figure 6 As shown, in order to adjust the tensioning wheel 7, a slide groove 321 is provided in the second arc-shaped base 32, and a wheel axle 71 connected to the tensioning wheel 7 is provided in the slide groove 321. The side of the wheel axle 71 is transmission-connected to the adjusting screw 72. When adjusting, the adjusting screw 72 is manually or automatically driven to rotate so that the wheel axle 71 slides in the slide groove 321, so that the tensioning wheel 7 tightens the chain 8.

[0051] like Fig. 9As shown, the surfaces of the driving wheel 6 and the tensioning wheel 7 are both provided with grooves for accommodating the chain 8, thereby driving the chain 8 to rotate.

[0052] Furthermore, the ends of the chain 8 are fixedly connected together using a butt-jointed locking ring to form a closed chain 8; the butt-jointed locking ring is conducive to adjusting the length of the chain 8 so as to adapt to bridge steel components 5 of different volumes.

[0053] In this embodiment, a motor mounting hole 322 is provided on the second arc-shaped base 32, and the drive motor 4 is inserted into the motor mounting hole 322. A plurality of fixing bolts 323 for fixing the drive motor 4 are installed on the side of the second arc-shaped base 32. During the installation of the drive motor 4, the drive motor 4 is inserted into the motor mounting hole 322 and is tightened and fixed using the fixing bolts 323 on the side. Four keys are installed at the end of the drive motor 4 to fix the driving wheel 6 at the end of the drive motor 4.

[0054] Furthermore, the driving motor 4 has a brake self-locking function, and when the bridge steel member 5 does not need to be flipped and adjusted, the bridge steel member 5 can be fixedly placed inside the arc-shaped base 3. The driving motor 4 is electrically connected to a synchronizer, and the synchronizer drives the two driving motors 4 to rotate synchronously, thereby realizing synchronous flipping of both ends of the bridge steel member 5.

[0055] Furthermore, a plurality of vents 324 are disposed on the side of the second arc-shaped base 32 , and the vents 324 are connected to the drive motor 4 , thereby facilitating cooling of the drive motor 4 .

[0056] The steps for using the automatic flipping device are as follows:

[0057] Step S1: the first flipping mechanism 1 and the second flipping mechanism 2 are used in conjunction with each other and are placed side by side;

[0058] Step S2: The bridge steel member 5 is placed between the first flip mechanism 1 and the second flip mechanism 2, and both ends of the bridge steel member 5 are placed inside the arc base 3, and the second cylinder 3152 and the third cylinder 3162 are higher than the arc base 3 and in direct contact with the bridge steel member 5;

[0059] Step S3: The chain 8 is wound around the bridge steel member 5, the driving wheel 6 and the tensioning wheel 7 inside the arc-shaped base 3 in sequence. In order to improve the stability of the flipping process, the bridge steel member 5 must be wound around for one round. Figure 1 As shown;

[0060] Step S4: manually or automatically rotating and driving the adjusting screw 72 so that the wheel shaft 71 slides inside the slide groove 321, so that the tensioning wheel 7 tightens the chain 8;

[0061] Step S5: Start the drive motor 4, and the drive motor 4 drives the active wheel 6 to rotate, so that the chain 8 and the tensioning wheel 7 rotate, thereby driving the bridge steel component 5 inside the arc base 3 to flip; the above-mentioned flipping can flip the bridge steel component 5 360° according to the needs of welding, flip it to any angle, and brake and fix it to facilitate subsequent welding.

[0062] The automatic flipping device avoids various safety risks such as rope breakage, derailment, and crane damage caused by flipping of the bridge crane in the background technology; it also avoids the construction risks of twisting and deformation of the flipped bridge steel structure 5, tearing and bursting of welds, and misalignment of construction and installation joints.

[0063] The automatic flipping device can be flipped to any angle according to welding requirements, providing great convenience and a welding operation platform for welding, saving lifting resources, not occupying a crane, and can be unhooked and removed after being hoisted into place.

[0064] The automatic turning device also solves the problem of huge impact force caused by the manual crane being out of sync. The two drive motors 4 work under the action of the synchronizer, and the drive motors 4 have a brake self-locking function.

[0065] The automatic turning device is also highly versatile, and can be used for through-length components, unit plates, butt-jointed steel plates, U-rib unit plates, etc. that need to be turned over or flipped.

[0066] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. An automatic turning device for large bridge steel components, characterized by: The invention comprises a first flipping mechanism (1) installed on one side and a second flipping mechanism (2) installed on the other side, wherein the first flipping mechanism (1) and the second flipping mechanism (2) both comprise an arc-shaped base (3) and a driving motor (4) installed on the arc-shaped base (3); a bridge steel component (5) is placed inside the arc-shaped base (3), and a driving wheel (6) is connected to the end of the driving motor (4); a chain (8) is sleeved on the driving wheel (6), and the chain (8) is wound around the bridge steel component (5) inside the arc-shaped base (3) and the driving wheel (6) in sequence; the driving motor (4) drives the driving wheel (6) to rotate the chain (8), thereby driving the bridge steel component (5) inside the arc-shaped base (3) to flip inside the arc-shaped base (3).

2. According to claim 1, the automatic turning device for large bridge steel members is characterized by: The arc-shaped base (3) is provided with a first arc-shaped groove (311) on both sides, and a second arc-shaped groove (312) is provided on one side of the first arc-shaped groove (311); the first arc-shaped groove (311) is provided with a third arc-shaped groove (314) for accommodating the end of a cylindrical roller (313); the cylindrical roller (313) comprises a first cylindrical roller (315) and a second cylindrical roller (316); the first cylindrical roller (315) and the second cylindrical roller (316) are arranged in a cycle in sequence; the first cylindrical roller (315) comprises a first cylinder (3151) and a second cylinder (316) arranged in the middle. 152), the second cylindrical roller (316) includes a first cylinder (3151) and a third cylinder (3162) arranged at both ends of the first cylinder (3151), the second cylinder (3152) is inserted between the two third cylinders (3162); the two ends of the first cylinder (3151) are inserted into the interior of the third arc-shaped groove (314), and the second arc-shaped groove (312) is used to accommodate the second cylinder (3152) and the third cylinder (3162); the second cylinder (3152) and the third cylinder (3162) are higher than the arc-shaped base (3) and are in direct contact with the bridge steel member (5).

3. The automatic turning device for large bridge steel members according to claim 2 is characterized in that: An arc-shaped pressure strip (317) is installed on the first arc-shaped groove (311), and a fourth arc-shaped groove (3171) is arranged inside the arc-shaped pressure strip (317). The fourth arc-shaped groove (3171) is used to cover the upper surface of the first cylinder (3151). The arc-shaped pressure strip (317) is fixed to the first arc-shaped groove (311) by bolts, and limits the cylindrical roller (313).

4. The automatic turning device for large bridge steel members according to claim 1 is characterized in that: The arc-shaped base (3) is also provided with a tensioning wheel (7). A driving wheel (6) is provided at one end of the arc-shaped base (3), and a tensioning wheel (7) is provided at the other end. Chains (8) are sleeved on the driving wheel (6) and the tensioning wheel (7). The tensioning wheel (7) tensions the chain (8), and the driving wheel (6) drives the tensioning wheel (7) to rotate via the chain (8).

5. The automatic turning device for large bridge steel members according to claim 4 is characterized in that: The arc-shaped base (3) comprises a first arc-shaped base (31) installed on one side and a second arc-shaped base (32) installed on the other side, wherein the first arc-shaped base (31) and the second arc-shaped base (32) are connected together via a plurality of connecting screws (33); the driving motor (4) is installed inside the second arc-shaped base (32), and the end of the driving motor (4) passes through the second arc-shaped base (32) and is provided with a driving wheel (6); one end of the second arc-shaped base (32) is provided with a driving wheel (6), and the other end is provided with a tensioning wheel (7).

6. The automatic turning device for large bridge steel members according to claim 1 is characterized by: Cylindrical guide wheels (35) are installed at both ends of the arc-shaped base (3). The cylindrical guide wheels (35) are in contact with the side of the bridge steel component (5) and guide the bridge steel component (5) to flip.

7. The automatic turning device for large bridge steel members according to claim 4 is characterized by: A sliding wheel (9) is arranged between the driving wheel (6) and the tensioning wheel (7). The sliding wheel (9) is arranged at the lower part of the chain (8) and is used to support the chain (8). Limiting protrusions (91) are arranged on both sides of the sliding wheel (9) to limit the chain (8) between the two limiting protrusions (91).

8. The automatic turning device for large bridge steel members according to claim 5 is characterized by: A slide groove (321) is provided in the second arc-shaped base (32), and a wheel shaft (71) connected to the tensioning wheel (7) is provided in the slide groove (321). The side of the wheel shaft (71) is drivingly connected to the adjusting screw (72), and the adjusting screw (72) is rotated to drive the wheel shaft (71) to slide in the slide groove (321), so that the tensioning wheel (7) tensions the chain (8).

9. The automatic turning device for large bridge steel members according to claim 4 is characterized by: The surfaces of the driving wheel (6) and the tensioning wheel (7) are both provided with grooves for accommodating the chain (8), thereby driving the chain (8) to rotate; the ends of the chain (8) are fixedly connected together using a butt lock ring to form a closed chain (8).

10. The automatic turning device for large bridge steel members according to claim 5 is characterized in that: The second arc-shaped base (32) is provided with a motor mounting hole (322), and the drive motor (4) is inserted into the motor mounting hole (322). The side of the second arc-shaped base (32) is provided with a plurality of fixing bolts (323) for fixing the drive motor (4); the side of the second arc-shaped base (32) is provided with a plurality of ventilation holes (324), and the ventilation holes (324) are connected to the drive motor (4); the drive motor (4) is connected to the driving wheel (6) through a plurality of keys, and the drive motor (4) has a brake self-locking function and is electrically connected to a synchronizer, and the synchronizer drives the two drive motors (4) to rotate synchronously, thereby realizing synchronous flipping of both ends of the bridge steel component (5).

Images