A welding mould for steel bridge structure

Abstract

The present invention discloses a welding mold for a steel structure bridge structure, comprising a supporting base, a lifting supporting mechanism and a supporting frame swinging mechanism, wherein a supporting base is placed on the ground, a bottom positioning assembly for limiting a bottom support of the bridge is arranged on the supporting base, and a plurality of ball supporting seats for supporting the bottom support are arranged on the top surface of the bottom supporting base; a placing platform is arranged on one side of a supporting bottom plate, a top support of the bridge is placed on the placing platform, a lifting supporting mechanism is arranged on the placing platform, and a supporting frame swinging mechanism is arranged above the supporting bottom plate, and splicing and welding of connecting frames between bridges are performed in an automatic swinging manner, thereby reducing the labor intensity of the staff, and simultaneously quickly swinging and improving the welding efficiency, and simultaneously performing automatic lifting and lowering of the support, thereby the height of the two supports can be adjusted according to the height difference of the bridge supports, and no gantry vehicle is required for lifting.

Description

Technical Field

[0001] The invention relates to the field of auxiliary welding equipment for steel structure products, and in particular to a welding mould for a steel structure bridge structure. Background Art

[0002] The assembly of the bridge frame is also to weld the steel structure into components. When building a bridge, multiple components can be assembled to form a bridge. When assembling the bridge components, in order to facilitate the subsequent bridge splicing, the component units are often welded first in the factory. A component unit consists of a bottom bracket, a top bracket and a connecting frame. When welding, a gantry truck is required to lift and place the upper and lower layers, which makes the operation of the staff more cumbersome. At the same time, when welding, the direct placement of the bridge must be ensured, so that after welding is completed, the bridge bracket can be directly connected with other bridges. Since the bridge is directly welded and assembled with heavier steel pipes, it is difficult to place the parts during welding and placement, so the labor intensity of the staff is relatively high and the welding efficiency is relatively low. Summary of the invention

[0003] In view of the deficiencies of the above-mentioned prior art, the present invention discloses a welding mold for a steel bridge structure, which performs splicing and welding of connecting frames between bridges by automatic swinging, thereby reducing the labor intensity of the workers, and at the same time quickly swings and improves welding efficiency. At the same time, the bracket is automatically raised and lowered, so that the height of the two brackets can be adjusted according to the height difference of the bridge brackets, without the need for a gantry truck for lifting.

[0004] To achieve the above-mentioned purpose, the scheme of the present invention is as follows: a welding mold for a steel structure bridge structure, comprising a supporting base, a lifting support mechanism and a supporting frame swinging mechanism, wherein a supporting base is placed on the ground, a bottom positioning assembly for limiting the bottom support of the bridge is arranged on the supporting base, and a plurality of ball support seats for supporting the bottom support are arranged on the top surface of the bottom supporting base; a placing platform is arranged on one side of the supporting bottom plate, the top support of the bridge is placed on the placing platform, a top positioning mechanism is arranged on the placing platform, and a plurality of ball support seats are also arranged on the top surface of the placing platform, the positioning of the top support on the placing platform is achieved by the top positioning mechanism, and a lifting support mechanism is arranged on the placing platform; the lifting support mechanism comprises a lifting frame, a tightening assembly and a lifting assembly, the lifting frame is a rectangular frame, and a plurality of ball support seats are arranged on the bottom of the lifting frame The top of the lifting frame is hinged with multiple groups of swing rods, and the same pressure-bearing rod is connected to the bottom of each group of swing rods. A spring is arranged in each swing rod and the lifting frame bracket, and the swing rod is inclined outward. A tightening assembly is arranged at both ends of the top bracket, and the tightening assembly is arranged with the bottom of the lifting frame. The two ends of the top bracket are tightened by the tightening assembly, and a linkage assembly is arranged between the tightening assembly and the swing rod rainbow. The linkage assembly is used to achieve that when the tightening is lost, the swing rod swings upward to make way. Lifting assemblies are arranged on both sides of the lifting frame, and sliding assemblies are arranged on the lifting assembly and the bottom surface. The translation of the lifting frame is achieved by the sliding assembly, so that the top bracket and the bottom bracket are relative to each other up and down; a support frame swinging mechanism is arranged above the supporting bottom plate, and the erection of the connecting bracket between the bottom bracket and the top bracket is achieved by the support frame swinging mechanism.

[0005] Preferably, the support frame swinging mechanism includes a swinging plate, a limit mold and an adjusting component, swinging plates are hinged on both sides of the support base, a hydraulic component is arranged between the swinging plate and the ground, the swinging of the swinging plate is realized by the hydraulic component, a plurality of limit molds are arranged on each swinging plate, an adjusting component is arranged between each limit mold and the swinging plate, the position of the limit mold is adjusted by the adjusting component, the limit mold is a circular sleeve, and a retractable support plate is arranged under each limit mold; the adjusting component includes a connecting plate, a sliding seat and a locking module, wherein the back side of each limit mold is connected to the connecting plate, a plurality of transversely arranged sliding grooves are arranged on the swinging plate, a sliding seat sliding in the sliding groove is embedded in the sliding groove, and the sliding seat is locked in the sliding groove by the locking module on the sliding seat.

[0006] Preferably, sliding assemblies are provided on both sides of the support base, the sliding assemblies are located on the outside of the swing plate, the sliding assemblies include rails and translation sliders, there are two rails and the two rails are horizontally arranged on the ground on both sides of the pre-welding mechanism, a plurality of translation sliders moving on the rails are provided on each rail, a driving assembly is provided between the translation slider and the rails, the sliding of the translation slider is realized by the driving assembly, a gantry is provided above the plurality of translation sliders and the gantry is erected above the support base, a lifting assembly is provided between the bottom of both ends of the gantry and the translation slider; the lifting assembly includes a hydraulic cylinder, a lifting seat and a guide rod, a vertically arranged guide rod is fixed to each translation slider, a lifting seat passes through each guide rod and the lifting seat is fixed to the bottom of both ends of the gantry, a hydraulic cylinder is provided between the lifting seat and the translation slider, lifting and lowering are realized by the hydraulic cylinder, and the plurality of lifting seats are connected to the lifting frame.

[0007] Preferably, notches are provided at both ends of the placing platform for the swing rod and the pressure rod to make way; the clamping assembly includes a clamping hydraulic module and a clamping plate, and a clamping hydraulic module is provided at both ends of the bottom of the lifting frame, and a clamping hydraulic module extending downward is also provided at the bottom of the lifting frame, and the piston rod of the clamping hydraulic module is downward, and a clamping plate is fixed on the piston rod of each clamping hydraulic module, and the clamping plate is clamped against the two ends and the top of the top bracket; a jacking assembly is provided on the placing platform, and the jacking of the top bracket is achieved by the jacking assembly; the linkage assembly includes a drum and a pull rope, one end of the pull rope is fixed on the clamping plate, and the other end of the pull rope is wound on the drum, and the drum is fixed at the hinge of the swing rod and the lifting frame, and a torsion spring is provided between the drum and the lifting frame, and when the clamping plate retreats, the swing rod is pulled to swing outward, so that the lifting frame and the top bracket make way; a roller is fixed on the pressure rod through a bearing, which facilitates positioning.

[0008] Preferably, a plurality of downwardly sunken grooves are opened in the support base, and a conveyor belt extending outward is arranged in each groove and can be raised and lowered; the bottom positioning assembly includes a plurality of inclined plates and the plurality of inclined plates are fixed on the support base, each two inclined plates form a group and each group of inclined plates is distributed on both sides of the bottom bracket to realize the positioning of the bottom bracket of the bridge.

[0009] Compared with the prior art, the advantages of the present invention are: the splicing and welding of the connecting frames between bridges are carried out in an automatic swinging manner, which reduces the labor intensity of the workers, and at the same time, the swinging is fast, the welding efficiency is improved, and the bracket is automatically raised and lowered at the same time, so that the height of the two brackets can be adjusted according to the height difference of the bridge bracket, and there is no need for a gantry truck to lift. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the front view of the present invention.

[0011] Figure 2 It is a top view of the present invention.

[0012] Figure 3 It is a schematic diagram of the lifting support mechanism of the present invention.

[0013] Figure 4 It is a front view of the lifting frame of the present invention.

[0014] Figure 5 Schematic diagram of two linkage components of the present invention.

[0015] Figure 6 It is a schematic diagram of the support frame swinging mechanism of the present invention.

[0016] Figure 7 This is a schematic diagram of processing a steel structure bridge skeleton according to the present invention.

[0017] Among them, 1. Support base, 1.1. Groove, 1.2. Conveyor belt, 1.3. Bottom positioning assembly, 1.4. Inclined plate, 1.6. Placing platform, 1.7. Lifting assembly, 1.8. Top positioning mechanism, 2. Lifting support mechanism, 2.1. Lifting frame, 2.2. Swing rod, 2.3. Pressure rod, 2.4. Linkage assembly, 2.5. Reel, 2.6. Pull rope, 2.7. Torsion spring, 2.8. Clamping assembly, 2.9. Clamping hydraulic module, 2.10. Clamping plate, 2. 11. Lifting assembly, 2.12. Hydraulic cylinder, 2.13. Lifting seat, 2.14. Guide rod, 2.15. Sliding assembly, 2.16. Track, 2.17. Translation slider, 2.18. Driving assembly, 2.19. Gantry, 3. Support frame swinging mechanism, 3.1. Swinging plate, 3.2. Hydraulic assembly, 3.3. Limiting mold, 3.4. Support plate, 3.5. Adjusting assembly, 3.6. Connecting plate, 3.7. Sliding seat, 3.8. Sliding groove, 3.9. Locking module. DETAILED DESCRIPTION

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] like Figure 1-7As shown, a steel structure bridge structure welding mold includes a support base 1, a lifting support mechanism 2 and a support frame swinging mechanism 3, wherein the support base 1 is placed on the ground, and a bottom positioning component 1.3 for limiting the bottom bracket of the bridge is arranged on the support base 1, and a plurality of downwardly concave grooves 1.1 are opened on the support base 1, and a conveyor belt 1.2 extending outward is arranged in each groove 1.1, and the conveyor belt 1.2 can be lifted and lowered, that is, the conveyor belt 1.2 is driven by a plurality of rollers arranged side by side, and a hydraulic cylinder 2.12 is arranged between the plurality of rollers and the bottom surface, and the lifting and lowering of the conveyor belt 1.2 is realized by lifting and lowering the hydraulic cylinder 2.12; the bottom positioning component 1.3 includes a plurality of inclined plates 1.4, and the plurality of inclined plates 1.4 are welded in a manner It is fixed on the supporting base 1, every two inclined plates 1.4 form a group and each group of inclined plates 1.4 is distributed on both sides of the bottom bracket to realize the positioning of the bottom bracket of the bridge, and a plurality of ball support seats for supporting the bottom bracket are fixed on the top surface of the bottom supporting base 1 by welding, so that the bottom bracket of the bridge can slide on the supporting base 1; a placing platform 1.6 is placed on the ground on the right side of the supporting bottom plate, and the top bracket of the bridge is placed on the placing platform 1.6, and a top positioning mechanism 1.8 is fixed on the placing platform 1.6 by welding, and the top positioning mechanism 1.8 is also a plurality of groups of inclined plates 1.4 and the plurality of groups of inclined plates 1.4 are located on both sides of the top bracket of the bridge, and the top bracket of the bridge is limited by the inclined plates 1.4. A plurality of ball bearing support seats are also fixed on the top by welding (to facilitate the movement of the bridge top bracket during positioning), the top bracket is positioned on the placement platform 1.6 by the top positioning mechanism 1.8, and a lifting support mechanism 2 is arranged on the top surface of the placement platform 1.6 (the clamping and lifting of the bridge top bracket are achieved by the lifting support mechanism 2); the lifting support mechanism 2 comprises a lifting frame 2.1, a tightening assembly 2.8 and a lifting assembly 2.11, the lifting frame 2.1 is a rectangular frame, and a plurality of groups of swing rods 2.2 are hinged at the bottom of the lifting frame 2.1 (two swing rods 2.2 arranged side by side are a group), and the same pressure rod 2.3 is connected to the bottom of each group of swing rods 2.2 (the two ends of the pressure rod 2.3 are welded) The two ends of the bridge top bracket are fixed to the bottom of the swing rod 2.2, and the two ends of the bridge top bracket extend between the swing rod 2.2. The bottom of the bridge top bracket is pressed on the pressure rod 2.3, so that the bridge top bracket is fixed to the lifting frame 2.1). A spring is fixed between each swing rod 2.2 and the lifting frame 2.1 by welding, and the swing rod 2.2 is tilted outward. A tightening assembly 2.8 is fixed at both ends of the bridge top bracket by bolts, and the tightening assembly 2.8 is arranged at the bottom of the lifting frame 2.1 (the two ends of the bridge top bracket are tightened by the tightening assembly 2.8). The two ends of the top bracket are tightened by the tightening assembly 2.8. A linkage assembly 2.4 is arranged between the tightening assembly 2.8 and the swing rod 2.2.4. When the two ends of the bridge top bracket lose the tightness, the swing rod 2.2 swings upward to make way, so that the bridge top bracket can be lowered. The lifting assembly 2.11 is fixed on the outer walls of the front and rear sides of the lifting frame 2.1 by welding, and the sliding assembly 2.15 is fixed between the lifting assembly 2.11 and the ground by bolts. The sliding assembly 2.15 is used to realize the left and right movement of the lifting frame 2.1, and the sliding assembly 2.15, the lifting assembly 2.11 and the lifting frame 2.1 are used to realize the upper and lower movement of the bridge top bracket from the swinging platform. Move to the top of the support base 1, and realize the translation of the lifting frame 2.1 through the sliding component 2.15, so that the bridge top bracket and the bridge bottom bracket are relative to each other, which is convenient for subsequent welding; a support frame swinging mechanism 3 is set above the support bottom plate, and the support frame between the bottom bracket and the top bracket is erected through the support frame swinging mechanism 3, and the support frame of the bridge top bracket and the bridge bottom bracket is placed between the bridge top bracket and the bridge bottom bracket through the support frame swinging mechanism 3 for welding, so that the automatic splicing reduces the labor intensity of the staff and improves the efficiency at the same time.

[0020] The support frame swing mechanism 3 includes a swing plate 3.1, a limit mold 3.3 and an adjustment component 3.5. The swing plates 3.1 are hinged on both sides of the support base 1, and a hydraulic component 3.2 is arranged between the swing plate 3.1 and the ground (the hydraulic component 3.2 is a hydraulic cylinder 2.12, the bottom of the hydraulic component 3.2 is hinged on the ground, and the telescopic rod of the hydraulic component 3.2 is hinged on the back of the swing rod 2.2. The swing of the swing rod 2.2 is achieved by the telescopic movement of the hydraulic component 3.2, that is, when the support frame is clamped, the swing plate 3.1 is arranged horizontally, and when the support frame is welded to the top bracket of the bridge and the bottom bracket of the bridge, the swing plate 3.1 is arranged vertically). The swing is achieved by the hydraulic component 3.2 The swing plate 3.1 is swung, and a plurality of limit molds 3.3 are arranged on each swing plate 3.1 (the support rod is clamped by the limit mold 3.3), and an adjustment component 3.5 is arranged between each limit mold 3.3 and the swing plate 3.1, and the position of the limit mold 3.3 is adjusted by the adjustment component 3.5 (that is, the position of the support frame is adjusted), and the limit mold 3.3 is a circular sleeve (the sleeve is assembled by two semicircular sleeves. After welding, the support frame and the sleeve can be separated by opening the sleeve, and the inner wall of the sleeve can be retracted), and a retractable support plate 3.4 is arranged under each limit mold 3.3, and the support frame can be adjusted by lifting and lowering the support plate 3.4. The support at the bottom of the frame (a horizontal groove is opened at the bottom 3.1 of the swing plate, and the support plate is embedded in the groove. A hydraulic cylinder is fixed between the support plate and the groove by welding. The support plate is pushed out and retracted into the groove by the extension and contraction of the hydraulic cylinder. When the support plate is pushed out of the groove, the support frame of the bridge is lifted up. When the support plate is retracted into the groove, the support frame of the bridge loses its lifted state and contacts with the top of the bottom support of the bridge for welding). When the swing plate 3.1 swings, the support plate 3.4 is lifted up to support the bottom of the support frame. When the support frame rotates into a vertical state, the bottom of the support frame is retracted from the upper support plate 3.4 of the bottom support of the bridge, so that the bottom of the support frame contacts with the top of the low support of the bridge. The adjusting assembly 3.5 comprises a connecting plate 3.6, a sliding seat 3.7 and a locking module 3.9, wherein the back side of each limiting mold 3.3 is fixed to the connecting plate 3.6 by bolt fastening, and a plurality of transverse sliding grooves 3.8 are provided on the swing plate 3.1, in which a sliding seat 3.7 sliding in the sliding groove 3.8 is embedded, and the sliding seat 3.7 is locked in the sliding groove 3.8 by the locking module 3.9 on the sliding seat 3.7 (the locking module 3.9 is a bolt, the locking bolt passes through the sliding seat 3.7 and abuts against the sliding groove 3.8, and the sliding seat 3.7 is locked in the sliding groove 3.8 by tightening the locking bolt to adjust the position of the support frame).

[0021] A sliding assembly 2.15 is fixed on the ground at both sides of the support base 1 by bolt fastening. The sliding assembly 2.15 is located on the outer side of the swing plate 3.1. The sliding assembly 2.15 includes a track 2.16 and a translation slider 2.17. The track 2.16 is two and the two tracks 2.16 are horizontally arranged on the ground at both sides of the swing plate 3.1. A plurality of translation sliders 2.17 moving on the track 2.16 are clamped on each track 2.16. A driving assembly 2.18 is arranged between the translation slider 2.17 and the track 2.16 (the driving assembly 2.18 is a chain meshed with a plurality of gears, a motor driving the gears to rotate is fixed on the gears by welding, and the chain is connected to the translation slider 2.17 by welding). The sliding of the translation slider 2.17 is realized by the driving assembly 2.18. A gantry 2.19 is arranged above the plurality of translation sliders 2.17 and the gantry 2.19 is erected above the support base 1. A lifting assembly 2.11 is fixed between the bottom of both ends of the gantry 2.19 and the translation slider 2.17; the lifting assembly 2.11 includes a lifting hydraulic cylinder 2.12, a lifting seat 2.13 and a guide rod 2.14. A plurality of vertically arranged guide rods 2.14 are fixed to each translation slider 2.17 by bolt fastening, and a lifting seat 2.13 passes through each guide rod 2.14 and is fixed to the bottom of both ends of the gantry 2.19 by welding (each lifting seat 2.13 is fixed to the bottom of both ends of the gantry 2.19 by welding). The lifting seat 2.13 is along the lifting seat 2.13, and a lifting hydraulic cylinder 2.12 is arranged between the lifting seat 2.13 and the translation slider 2.17 (the piston rod of the lifting hydraulic cylinder 2.12 is fixed on the translation slider 2.17 by bolt fastening, and the cylinder body of the lifting hydraulic cylinder 2.12 is fixed to the bottom of the gantry 2.19 by welding), and lifting is achieved by the hydraulic cylinder 2.12, and multiple lifting seats 2.13 are connected to the lifting frame 2.1, and lifting is achieved by the lifting hydraulic cylinder 2.12.

[0022] At both ends of the placement platform 1.6, there are gaps for making way for the swing rod 2.2 and the pressure rod 2.3, and the gaps correspond to the two ends of the bridge top bracket; the clamping assembly 2.8 includes a clamping hydraulic module 2.9 and a clamping plate 2.10, and the two ends of the bottom of the lifting frame 2.1 are fixed with a clamping hydraulic module 2.9 (that is, a hydraulic cylinder 2.12) by bolt fastening, and the bottom of the lifting frame 2.1 is also fixed with a downwardly extending clamping hydraulic module 2.9 by bolt fastening, and the piston rod of the clamping hydraulic module 2.9 is downward, and a clamping plate 2.10 is fixed to the piston rod of each clamping hydraulic module 2.9 by welding, and the clamping plate 2.10 is clamped against the two ends and the top of the top bracket to ensure the stability of the bridge top bracket clamping; there is a jacking assembly 1.7 on the top surface of the placement platform 1.6, and the jacking of the bridge top bracket is realized by the jacking assembly 1.7 (when the bridge top bracket is clamped, the bridge top bracket is realized by the jacking assembly 1.7 Lifting up, so as to facilitate the bridge top column support to rise, and reduce the lifting pressure of the lifting component 2.11); the linkage component 2.4 includes a drum 2.5 and a pull rope 2.6, one end of the pull rope 2.6 is fixed to the clamping plate 2.10 by welding, and the other end of the pull rope 2.6 is wound around the drum 2.5, and the drum 2.5 is fixed to the hinge of the swing rod 2.2 and the lifting frame 2.1 by welding (the drum 2.5 swings with the swing rod 2.2), and the drum 2.5 is fixed to the hinge of the swing rod 2.2 and the lifting frame 2.1 by welding. A torsion spring 2.7 is fixed between the lifting frame 2.5 and the lifting frame 2.1 by welding (the torsion spring 2.7 enables the reel 2.5 to drive the swing rod 2.2 to rotate inwardly). When the pressing plate 2.10 retreats, the swing rod 2.2 is pulled to swing outwardly, so that the lifting frame 2.1 and the top bracket give way, which is convenient for separating the bridge top bracket from the lifting frame 2.1; a roller is fixed on the pressure rod 2.3 through a bearing, which is convenient for the bridge top bracket and the pressure rod 2.3 to be rolled and positioned.

Claims

1. A welding mold for a steel structure bridge structure, comprising a support base, a lifting support mechanism and a support frame swinging mechanism, wherein a support base is placed on the ground, a bottom positioning assembly for limiting the bottom bracket of the bridge is arranged on the support base, and a plurality of ball support seats for supporting the bottom bracket are arranged on the top surface of the bottom support base; characterized in that, A placement platform is provided on one side of the supporting bottom plate, the bridge top bracket is placed on the placement platform, a top positioning mechanism is provided on the placement platform, a plurality of ball bearing support seats are also provided on the top surface of the placement platform, the top bracket is positioned on the placement platform through the top positioning mechanism, and a lifting support mechanism is provided on the placement platform; The lifting support mechanism includes a lifting frame, a clamping assembly and a lifting assembly. The lifting frame is a rectangular frame. A plurality of swing rods are hinged at the bottom of the lifting frame. The bottom of each swing rod is connected to the same pressure-bearing rod. A spring is arranged in each swing rod and the lifting frame bracket, and the swing rod is inclined outward. Clamping assemblies are arranged at both ends of the top bracket and the clamping assemblies are arranged at the bottom of the lifting frame. The two ends of the top bracket are clamped by the clamping assembly. A linkage assembly is arranged between the clamping assembly and the swing rod. The linkage assembly realizes that when the two ends of the top bracket of the bridge lose the clamping, the swing rod swings upward to make way. Lifting assemblies are arranged on both sides of the lifting frame. A sliding assembly is arranged between the lifting assembly and the ground. The translation of the lifting frame is realized by the sliding assembly, so that the top bracket and the bottom bracket are relative to each other up and down; a support frame swinging mechanism is arranged above the support bottom plate, and the erection of the connecting bracket between the bottom bracket and the top bracket is realized by the support frame swinging mechanism.

2. A steel bridge structure welding mold according to claim 1, characterized in that: The support frame swinging mechanism includes a swinging plate, a limit mold and an adjusting component. Swinging plates are hinged on both sides of the support base. A hydraulic component is arranged between the swinging plate and the ground. The swinging plate is swung by the hydraulic component. A plurality of limit molds are arranged on each swinging plate. An adjusting component is arranged between each limit mold and the swinging plate. The position of the limit mold is adjusted by the adjusting component. The limit mold is a circular sleeve. A retractable support plate is arranged under each limit mold. The adjusting component includes a connecting plate, a sliding seat and a locking module, wherein the back of each limit mold is connected to the connecting plate, a plurality of transversely arranged sliding grooves are arranged on the swinging plate, a sliding seat sliding in the sliding groove is embedded in the sliding groove, and the sliding seat is locked in the sliding groove by a locking module on the sliding seat.

3. A steel bridge structure welding mold according to claim 2, characterized in that: Sliding assemblies are arranged on both sides of the supporting base, and the sliding assemblies are located on the outer side of the swing plate. The sliding assemblies include rails and translational sliders. There are two rails and the two rails are horizontally arranged on the ground on both sides of the pre-welding mechanism. A plurality of translational sliders moving on the rails are arranged on each rail. A driving assembly is arranged between the translational slider and the rails, and the sliding of the translational slider is realized by the driving assembly. A gantry is arranged above the plurality of translational sliders and the gantry is erected above the supporting base, and a lifting assembly is arranged between the bottom of both ends of the gantry and the translational slider; the lifting assembly includes a hydraulic cylinder, a lifting seat and a guide rod, a vertically arranged guide rod is fixed to each translational slider, a lifting seat passes through each guide rod, and the lifting seat is fixed to the bottom of both ends of the gantry, a hydraulic cylinder is arranged between the lifting seat and the translational slider, and lifting is realized by the hydraulic cylinder, and the plurality of lifting seats are connected to the lifting frame.

4. A steel bridge structure welding mold according to claim 3, characterized in that: Notches are provided at both ends of the placing platform for making way for the swing rod and the pressure rod; the clamping assembly includes a clamping hydraulic module and a clamping plate, and clamping hydraulic modules are provided at both ends of the bottom of the lifting frame, and a clamping hydraulic module extending downward is also provided at the bottom of the lifting frame, and the piston rod of the clamping hydraulic module is downward, and a relatively arranged clamping plate is fixed on the piston rod of each clamping hydraulic module, and the clamping plate is clamped against the two ends and the top of the top bracket; a jacking assembly is provided on the placing platform, and the jacking of the top bracket is achieved by the jacking assembly; the linkage assembly includes a drum and a pull rope, one end of the pull rope is fixed on the clamping plate, and the other end of the pull rope is wound on the drum, and the drum is fixed at the hinge of the swing rod and the lifting frame, and a torsion spring is provided between the drum and the lifting frame, and when the clamping plate retreats, the swing rod is pulled to swing outward, so that the swing rod makes way for the top bracket; a roller is fixed on the pressure rod through a bearing, which facilitates positioning.

5. A steel bridge structure welding mold according to claim 4, characterized in that: A plurality of downwardly sunken grooves are opened on the support base, and a conveyor belt extending outward is arranged in each groove and the conveyor belt can be raised and lowered; the bottom positioning assembly includes a plurality of inclined plates and the plurality of inclined plates are fixed on the support base, each two inclined plates form a group and each group of inclined plates is distributed on both sides of the bottom bracket to realize the positioning of the bottom bracket of the bridge.

Images