A steel box girder welding positioning device

Abstract

The present invention discloses a steel box girder welding positioning device, which includes a base, a lifting assembly, a longitudinal driving assembly, a transverse driving assembly, a jaw assembly and a controller. A support column is connected to the base, and the upper end of the support column is connected with a support plate. The lifting mechanism is fixedly connected to the support plate, and the output end of the lifting mechanism is connected with a mounting plate for driving the mounting plate to lift. A vertical track is provided on the support column, and a mounting block is slidably connected to the vertical track. The longitudinal driving assembly is fixedly connected to the mounting block and is connected with the mounting plate for driving the mounting plate to move longitudinally; the transverse driving assembly is fixedly connected to the mounting plate, and the transverse driving assembly is connected with the jaw assembly for driving the jaw assembly to move transversely. The jaw assembly is used for gripping the steel box girder. The controller is electrically connected to the lifting mechanism, the longitudinal driving assembly, the transverse driving assembly and the jaw assembly respectively.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel box girder construction, and particularly relates to a steel box girder welding positioning device. Background Art

[0002] With the continuous development of current science and technology and economy in China, as well as the strong advocacy of the concepts of green, scientific, and sustainable development in engineering construction, compared with traditional concrete bridges, the steel box girder technology, as a new construction technology, has become a common structural form in the construction of long-span bridge projects. Steel structure bridges have lower carbon emissions and extremely high recovery rates compared with concrete bridges. Therefore, steel structure bridges are more energy-saving and environmentally friendly.

[0003] However, in the current welding process of steel box girder segments, they are often lifted to the designated position by a tower crane for welding. During the welding process, the welded steel box girder cannot be accurately positioned and fixed. During the welding process, due to the shaking of the beam body, large errors are likely to occur after welding, and there is also a risk of safety accidents due to uneven stress on the bridge after the bridge erection is completed. Summary of the Invention

[0004] The purpose of the present invention is to provide a steel box girder welding positioning device to solve the problem that the existing steel box girder cannot be accurately positioned during the welding process.

[0005] The technical solution of the present invention is as follows:

[0006] A steel box girder welding positioning device includes:

[0007] A base and a lifting mechanism. A support column is connected to the base, the upper end of the support column is connected to a support plate, the lifting mechanism is fixedly connected to the support plate, and the output end of the lifting mechanism is connected to a mounting plate for driving the mounting plate to lift and lower;

[0008] A longitudinal driving component, a transverse driving component, and a clamping jaw component. A vertical track is provided on the support column, a mounting block is slidably connected to the vertical track, the longitudinal driving component is fixedly connected to the mounting block and is connected to the mounting plate for driving the mounting plate to move longitudinally; the transverse driving component is fixedly connected to the mounting plate, the transverse driving component is connected to the clamping jaw component for driving the clamping jaw component to move transversely; the clamping jaw component is used for clamping the steel box girder;

[0009] A controller, which is electrically connected to the lifting mechanism, the longitudinal driving component, the transverse driving component, and the clamping jaw component respectively.

[0010] Preferably, the lifting mechanism includes a lifting motor, a wire turn, and a steel wire rope. The lifting motor is fixedly connected to the support plate. The output end of the lifting motor is connected to the wire turn. One end of the steel wire rope is connected to the wire turn and wound around the wire turn, and the other end is connected to the mounting plate. The controller is electrically connected to the lifting motor.

[0011] Preferably, at least one chute is provided on the mounting plate. A connecting column is slidably connected to the chute. The lower surface of the connecting column is fixedly connected to the jaw assembly.

[0012] The longitudinal driving assembly includes a longitudinal motor and at least one gear-rack unit. The gear-rack unit includes a gear and a rack. The longitudinal motor is fixedly connected to the mounting plate. The output shaft of the longitudinal motor is connected to the gear. The rack is provided on the jaw assembly, and the length direction of the rack is parallel to the length direction of the chute.

[0013] The controller is electrically connected to the longitudinal motor.

[0014] Preferably, the lateral driving assembly includes a cylinder. The cylinder is fixedly connected to the mounting block. The output shaft of the cylinder is connected to the mounting plate. The controller is electrically connected to the cylinder.

[0015] Preferably, the jaw assembly includes a mounting box, a threaded rod, a jaw motor, and two oppositely arranged clamping plates. The controller is electrically connected to the jaw motor.

[0016] The mounting box is fixedly connected to the connecting column. The rack is provided on the mounting box. A threaded rod is rotatably connected to the mounting box. Two sections of threads with opposite helical directions are provided along the length direction of the threaded rod. Two threaded rod sleeves are respectively sleeved on the two sections of threads. The two threaded rod sleeves are respectively connected to the two clamping plates. The jaw motor is fixedly connected to the mounting box, and its output end is connected to the threaded rod for driving the threaded rod to rotate to drive the two clamping plates to move towards or away from each other.

[0017] Preferably, a slide rod parallel to the threaded rod is further provided on the mounting box. Two sliding sleeves are slidably connected to the slide rod. The two sliding sleeves are respectively connected to the two threaded rod sleeves.

[0018] Preferably, a friction pad is provided on the clamping surface of the clamping plate.

[0019] Preferably, an infrared locator is provided on the clamping plate. The output end of the infrared locator is electrically connected to the input end of the controller.

[0020] Preferably, the base includes a bottom plate and a counterweight. The bottom plate is connected to the support column. The counterweight is connected to the bottom plate.

[0021] Preferably, wheels are provided on the lower surface of the bottom plate.

[0022] Due to the adoption of the above technical solutions, the present invention has the following advantages and positive effects compared with the prior art:

[0023] In the steel box girder welding positioning device provided by the present invention, when in use, the steel box girder is clamped by the clamping jaw assembly, the vertical positioning of the steel box girder is carried out by the lifting mechanism, and the longitudinal and transverse positioning of the steel box girder are respectively carried out by the longitudinal driving assembly and the transverse driving assembly. Therefore, the steel box girder welding positioning device provided by the present invention solves the problem that the steel box girder cannot be accurately positioned during the welding process in the prior art. Description of the Drawings

[0024] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention.

[0025] Figure 1 is a schematic structural diagram of a steel box girder welding positioning device of the present invention;

[0026] Figure 2 is an enlarged structural view of part A of the present invention.

[0027] Description of the Reference Numerals:

[0028] 1: bottom plate; 2: support column; 201: vertical track; 3: support plate; 4: counterweight; 5: wheel; 6: lifting motor; 7: wire turn; 8: steel wire rope; 9: mounting plate; 901: chute; 10: connecting column; 11: mounting box; 12: threaded rod; 13: threaded rod sleeve; 14: slide rod; 15: sliding sleeve; 16: clamping jaw motor; 17: clamping plate: 18: friction pad; 19: longitudinal motor; 20: gear; 21: rack; 22: cylinder; 23: mounting block; 24: steel box girder. Detailed Embodiments

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific embodiments of the present invention will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings, and other embodiments can also be obtained.

[0030] To simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product as a whole. In addition, to simplify the drawings for easier understanding, for components with the same structure or function in some figures, only one of them is schematically shown, or only one of them is labeled. In this document, "one" not only means "only this one", but also can mean "more than one" situation.

[0031] Referring to Figure 1 and Figure 2 , this embodiment provides a steel box girder welding positioning device, which includes a base, a lifting assembly, a longitudinal driving assembly, a transverse driving assembly, a jaw assembly and a controller. A support column 2 is connected to the base, the upper end of the support column 2 is connected to a support plate 3, the lifting mechanism is fixedly connected to the support plate 3, and the output end of the lifting mechanism is connected to a mounting plate 9 for driving the mounting plate 9 to move up and down. A vertical track 201 is provided on the support column 2, a mounting block 23 is slidably connected to the vertical track 201, the longitudinal driving assembly is fixedly connected to the mounting block 23 and is connected to the mounting plate 9 for driving the mounting plate 9 to move longitudinally; the transverse driving assembly is fixedly connected to the mounting plate 9, and the transverse driving assembly is connected to the jaw assembly for driving the jaw assembly to move transversely. The jaw assembly is used for gripping the steel box girder 24. The controller is electrically connected to the lifting mechanism, the longitudinal driving assembly, the transverse driving assembly and the jaw assembly respectively.

[0032] In this embodiment, the steel box girder 24 is gripped by the jaw assembly, the vertical positioning of the steel box girder 24 is carried out by the lifting mechanism, and the longitudinal and transverse positioning of the steel box girder 24 are carried out by the longitudinal driving assembly and the transverse driving assembly respectively.

[0033] Now, the structure of this embodiment will be described.

[0034] The base includes a bottom plate 1 and a counterweight 4. The upper surface of the bottom plate 1 is fixedly connected to the lower end of the support column 2, and the counterweight 4 is fixedly connected to the upper surface of the bottom plate 1. To improve the safety of the steel box girder welding positioning device, the weight and material of the counterweight 4 should be appropriately selected according to the working requirements. Four wheels 5 are provided on the lower surface of the bottom plate 1, which has the effect of facilitating movement and use.

[0035] The lifting mechanism includes a lifting motor 6, a wire turn 7 and a steel wire rope 8. The lifting motor 6 is fixedly connected to the upper surface of the support plate 3, the output end of the lifting motor 6 is fixedly connected to the wire turn 7, one end of the steel wire rope 8 is connected to the wire turn 7 and wound around the wire turn 7, and the other end is connected to the mounting plate 9. At least one chute 901 is provided on the lower surface of the mounting plate 9, in this embodiment, there are two chutes 901, and the length directions of the two chutes 901 are parallel. A connecting column 10 is slidably connected to the inside of each of the two chutes 901, and the lower surface of the connecting column 10 is fixedly connected to the jaw assembly.

[0036] The jaw assembly includes a hollow mounting box 11, a threaded rod 12, a jaw motor 16, and two oppositely arranged clamping plates 17. The upper surface of the mounting box 11 is fixedly connected to the lower ends of two connecting columns 10. The threaded rod 12 is rotatably connected to two opposite side walls of the mounting box 11. Two sections of threads with opposite helix directions are provided along the length direction of the threaded rod 12. Threaded rod sleeves 13 are respectively sleeved on the two sections of threads. The lower surfaces of the two threaded rod sleeves 13 are respectively fixedly connected to the two clamping plates 17. A steel box girder 24 is clamped between the two clamping plates 17. The jaw motor 16 is fixedly connected to the outer surface of the mounting box 11, and its output end is connected to the threaded rod 12, and is used to drive the threaded rod 12 to rotate so that the two clamping plates 17 move towards or away from each other, thereby realizing clamping or loosening of the steel box girder 24 by the two clamping plates 17.

[0037] Further, a slide rod 14 parallel to the threaded rod 12 is fixedly connected between two opposite side walls inside the mounting box 11. Two sliding sleeves 15 are slidably connected to the slide rod 14. The two sliding sleeves 15 are respectively fixedly connected to the two threaded rod sleeves 13, which has a limiting effect and ensures that the threaded sleeve can move stably along the length direction of the slide rod 14.

[0038] Further, a friction pad 18 is provided on the clamping surface of the clamping plate 17, which has the effect of avoiding clamping marks on the steel box girder 24.

[0039] The longitudinal driving assembly includes a longitudinal motor 19 and a gear-rack unit. The gear-rack unit includes a matching gear 20 and a rack 21. In this embodiment, there are two gear-rack units, that is, there are two gears 20 and two racks 21 respectively. The longitudinal motor 19 is fixed on the upper surface of the mounting plate 9, and its output shaft is fixedly connected to the above two gears 20; the rack 21 is fixedly connected to the upper inner surface of the mounting box 11. The longitudinal motor 19 drives the gear 20 to rotate. Through the meshing between the gear 20 and the rack 21, the jaw assembly and the steel box girder clamped by the jaw assembly are driven to move longitudinally, which has the effect of adjusting the position of the steel box girder 24. Among them, there may be interference between the position of the gear 20 and the mounting plate 9. If there is interference, an avoidance hole can be provided on the mounting plate 9.

[0040] The transverse driving assembly includes a cylinder 22. The cylinder 22 is fixedly connected to the mounting block 23, and the output shaft of the cylinder 22 is fixedly connected to the mounting plate 9. The cylinder 22 drives the mounting plate 9 to move, and then drives the steel box girder to move, which has the effect of adjusting the position of the steel box girder 24. Since the mounting block 23 slides on the vertical track 201, the moving position of the mounting plate 9 in the vertical direction is restricted. Therefore, the vertical track 201 also has a limiting effect, restricting the up and down moving position of the jaw assembly, and further restricting the up and down moving position of the clamped steel box girder 24.

[0041] The output ends of the controller are electrically connected to the input ends of the lifting motor 6, the longitudinal motor 19, the air cylinder 22 and the gripper motor 16 respectively. The outer surface of the controller is provided with manual control buttons for the convenience of users.

[0042] Further, an infrared locator is provided on the clamping plate 17, and another infrared locator corresponding to the infrared locator on the clamping plate 17 is provided on another steel box girder welded to the steel box girder 24 clamped by the gripper assembly, and the output ends of the two infrared locators are electrically connected to the input end of the controller. The two infrared locators cooperate to realize the automatic positioning of the steel box girder 24.

[0043] The steel box girder welding positioning device provided by this embodiment can hoist and position the steel box girder during use, and judge the position of the steel box girder 24 through the provided infrared locator. The infrared locator can be adjusted appropriately according to the working requirements, so as to control the docking parameters within the allowable error range, reduce the error of welding forming, avoid the phenomenon of uneven stress on the bridge after erection, reduce the probability of safety accidents caused by uneven stress on the bridge, and improve the safety of the project.

[0044] The usage steps of the steel box girder welding positioning device provided by this embodiment are as follows:

[0045] S1. Start the lifting motor 6. The lifting motor 6 drives the wire turn 7 to rotate, releases the steel wire rope 8, and makes the clamping plate 17 move to the position of the steel box girder 24 under the action of gravity;

[0046] S2. Start the gripper motor 16. The gripper motor 16 drives the threaded rod 12 to rotate. Since the thread directions at both ends of the threaded rod 12 are opposite, the two threaded rod sleeves 13 drive the clamping plate 17 to move along the direction of the slide rod 14, achieving the effect of clamping and fixing the steel box girder 24;

[0047] S3. Start the lifting motor 6. The lifting motor 6 drives the wire turn 7 to rotate in the reverse direction, winds the steel wire rope 8, and makes the gripper assembly drive the steel box girder to move upward to the working position:

[0048] S4. Adjust the position of the steel box girder, judge the position of the steel box girder 24 through the infrared locator, and make appropriate adjustments according to the working requirements:

[0049] (1) Height adjustment: Drive the wire turn 7 to rotate through the lifting motor 6, and then drive the steel box girder to move up and down to adjust its height;

[0050] (2) Lateral adjustment: Drive the mounting plate 9 to move laterally through the air cylinder 22, and then drive the steel box girder to move laterally to adjust its lateral position;

[0051] (3)Vertical adjustment: The longitudinal motor 19 drives the gear 20 to rotate. Through the cooperation between the gear 20 and the rack 21, the installation box 11 and the steel girder box are driven to move longitudinally, achieving the effect of adjusting their longitudinal positions.

[0052] S5. When the position of the steel box girder 24 meets the working requirements, the welding work can be carried out.

[0053] In summary, for the steel box girder welding positioning device, during use, it can hoist and position the steel girder box, and through the infrared positioning instrument, judge the position of the steel box girder 24. It can be appropriately adjusted according to the working requirements, so as to control the butt joint parameters within the allowable error range, reduce the error of the welded shape, avoid uneven stress on the bridge after erection, and solve the potential risk of safety accidents caused by uneven stress on the bridge after erection.

[0054] The above has described in detail the embodiments of the present invention with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, provided that these changes fall within the scope of the claims of the present invention and their equivalent technologies, they still fall within the protection scope of the present invention.

Claims

1. A steel box girder welding positioning device, characterized in that, Comprising: A base and a lifting mechanism. A support column is connected to the base. The upper end of the support column is connected to a support plate. The lifting mechanism is fixedly connected to the support plate. The output end of the lifting mechanism is connected to a mounting plate for driving the mounting plate to lift and lower. A longitudinal driving assembly, a transverse driving assembly and a jaw assembly. A vertical track is provided on the support column. A mounting block is slidably connected to the vertical track. The longitudinal driving assembly is fixedly connected to the mounting block and is connected to the mounting plate for driving the mounting plate to move longitudinally. The transverse driving assembly is fixedly connected to the mounting plate. The transverse driving assembly is connected to the jaw assembly for driving the jaw assembly to move transversely. The jaw assembly is used for gripping a steel box girder. A controller, which is electrically connected to the lifting mechanism, the longitudinal driving assembly, the transverse driving assembly and the jaw assembly respectively; Wherein, the lifting mechanism includes a lifting motor, a wire turn and a steel wire rope. The lifting motor is fixedly connected to the support plate. The output end of the lifting motor is connected to the wire turn. One end of the steel wire rope is connected to the wire turn and wound around the wire turn, and the other end is connected to the mounting plate. The controller is electrically connected to the lifting motor; The transverse driving assembly includes a cylinder. The cylinder is fixedly connected to the mounting block. The output shaft of the cylinder is connected to the mounting plate. The controller is electrically connected to the cylinder; At least one sliding groove is provided on the mounting plate. A connecting column is slidably connected to the sliding groove. The lower surface of the connecting column is fixedly connected to the jaw assembly; The longitudinal driving assembly includes a longitudinal motor and at least one gear-rack unit. The gear-rack unit includes a gear and a rack. The longitudinal motor is fixedly connected to the mounting plate. The output shaft of the longitudinal motor is connected to the gear. The rack is provided on the jaw assembly, and the length direction of the rack is parallel to the length direction of the sliding groove; The controller is electrically connected to the longitudinal motor.

2. The steel box girder welding positioning device according to claim 1, wherein The jaw assembly includes a mounting box, a threaded rod, a jaw motor and two oppositely arranged clamping plates. The controller is electrically connected to the jaw motor; The mounting box is fixedly connected to the connecting column. The rack is provided on the mounting box. A threaded rod is rotatably connected to the mounting box. Two sections of threads with opposite helix directions are provided on the threaded rod along its length direction. Two threaded rod sleeves are respectively sleeved on the two sections of threads. The two threaded rod sleeves are respectively connected to the two clamping plates. The jaw motor is fixedly connected to the mounting box, and its output end is connected to the threaded rod for driving the threaded rod to rotate to drive the two clamping plates to move towards or away from each other.

3. The steel box girder welding positioning device according to claim 2, characterized in that, A sliding rod parallel to the threaded rod is further provided on the mounting box. Two sliding sleeves are slidably connected to the sliding rod. The two sliding sleeves are respectively connected to the two threaded rod sleeves.

4. The steel box girder welding positioning device according to claim 2, wherein, A friction pad is provided on the clamping surface of the clamping plate.

5. The steel box girder welding positioning device according to claim 2, wherein An infrared locator is provided on the clamping plate. The output end of the infrared locator is electrically connected to the input end of the controller.

6. The steel box girder welding positioning device according to claim 1, characterized in that The base includes a bottom plate and a counterweight. The bottom plate is connected to the support column. The counterweight is connected to the bottom plate.

7. The steel box girder welding positioning device according to claim 6, characterized in that, Wheels are provided on the lower surface of the bottom plate.

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