Welding seam polishing equipment for steel box girder

Abstract

The utility model relates to the technical field of steel box girder polishing, in particular to welding seam polishing equipment for a steel box girder, which comprises a cart, a polisher mounted on the cart and a belt transmission device for driving the polisher to rotate. A laser displacement sensor and a U-shaped column are installed on a shell of the polisher, a connecting plate is fixed to the inner side of the U-shaped column, and a bottom plate is movably connected to the tail end of the U-shaped column. According to the welding seam polishing equipment for the steel box girder, when a welding seam is polished through the polisher, under the action of a spring, a connecting rod can be pushed to drive a roller on a bottom plate to be tightly attached to the ground, when a trolley moves, the roller can move at the position where the welding seam is polished, and when the position where the welding seam is polished is not flat, the roller can be jacked up by a protruding position; and meanwhile, the bottom plate is driven to move upwards, whether polishing is smooth or not can be judged through irradiation of the laser displacement sensor on the bottom plate, and therefore the judgment on the polishing precision can be improved, and the final quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of steel box girder grinding technology, specifically to a steel box girder weld grinding equipment. Background Technology

[0002] As a common type of bridge structure, the quality of welding during the manufacturing and installation of steel box girders directly affects the safety and durability of the entire bridge. As a key part connecting various components, the quality of the surface treatment of the welds is of paramount importance.

[0003] Traditionally, weld grinding is done manually with a hand-held grinder. Since manual grinding requires operators to have a high level of skill and rich experience, the grinding effect can vary greatly between different workers. Judging the smoothness by visual inspection is not only time-consuming, but also difficult to achieve high precision, which will affect the final product quality. Long hours of hand-held grinding is a physically demanding task for workers, which can easily cause fatigue and thus affect the grinding quality and efficiency. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: a steel box girder weld grinding equipment, comprising a trolley and a grinder mounted on the trolley, and a belt drive device for driving the grinder to rotate.

[0005] The polisher's outer shell is equipped with a laser displacement sensor and a U-shaped column. A connecting plate is fixed to the inner side of the U-shaped column, and a base plate is movably connected to its tail end. A connecting rod that passes through the connecting plate is hinged to the base plate, and a roller is installed thereon. A nut is threadedly connected to the outer side of the connecting rod above the connecting plate. A limiting protrusion is formed on the outer side of the connecting rod, and a spring is also sleeved on the outer side between the limiting protrusion and the connecting plate.

[0006] Furthermore, a locking plate is fixed to the outside of the grinder by screws. The locking plate has two semi-circular arched surfaces. Both ends of the U-shaped column are extended in a J-shape, and the U-shaped column and the extended J-shaped ends are adapted to the semi-circular arched surfaces of the locking plate.

[0007] Furthermore, the connecting plate has a waist hole, the top of the connecting rod passes through the waist hole, and the outer side has a slot that can be engaged with the connecting plate.

[0008] Furthermore, the inner side of the trolley is hinged to a hinge frame, and a cylinder is hinged to it. The piston rod of the cylinder is hinged to one end of the hinge frame. The grinder and the belt drive device are both mounted on the hinge frame.

[0009] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0010] The steel box girder weld grinding equipment uses a grinder to grind the weld seam. Under the action of a spring, a connecting rod is pushed to move a roller on the base plate to press against the ground. When the vehicle moves, the roller moves in the ground area. If the ground area is not flat enough, the raised part will lift the roller and move the base plate upward. By irradiating the base plate with a laser displacement sensor, the flatness of the grinding can be judged, thus improving the judgment of grinding accuracy and improving the final quality. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a three-dimensional schematic diagram of the grinding tool connection structure in this utility model;

[0013] Figure 3 This is a cross-sectional schematic diagram of the U-shaped column connection structure in this utility model.

[0014] In the diagram: 1. Trolley; 2. Hinge; 3. Cylinder; 4. Belt drive; 5. Grinding tool; 7. Locking plate; 8. U-shaped column; 9. Base plate; 10. Roller; 11. Connecting rod; 12. Limiting protrusion; 13. Groove; 14. Spring; 15. Connecting plate; 16. Nut; 17. Laser displacement sensor. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-3 This embodiment of a steel box girder weld grinding device includes a trolley 1, a lifting assembly mounted on the trolley 1, a belt drive device 4 mounted on the lifting assembly, and a grinder 5 mounted at the head end. The belt drive device 4 drives the grinder 5 to run. A laser displacement sensor 17 and an inclined U-shaped column 8 are mounted on the outer shell of the grinder 5. The head end of the U-shaped column 8 is rotatably connected to an inclined base plate 9, and a connecting plate 15 is fixed on the inner side. A roller 10 that is in contact with the ground is mounted on the other end of the base plate 9. A connecting rod 11 that passes through the base plate 9 is also hinged to the surface of the base plate 9. A nut 16 located above the connecting plate 15 is threaded to the head end of the connecting rod 11, and a limiting protrusion 12 is formed in the middle section of the connecting rod 11. A spring 14 located above the limiting protrusion 12 is also sleeved on the outer side of the connecting rod 11.

[0017] In the above structure, after the trolley is moved to the appropriate position, the belt drive device drives the grinder to run. Then, the lifting component moves the grinder close to the weld and grinds it flat. The trolley moves while grinding, and when the trolley moves, it also drives the roller to walk on the weld. With the cooperation of the spring and the limiting protrusion, the base plate is pushed. At the same time, the base plate drives the roller to stick to the ground. When the weld is not ground flat enough, when the roller moves up, it will drive the base plate to rise. At the same time, it will drive the connecting rod to squeeze the spring. Meanwhile, the laser displacement sensor will irradiate the base plate. When the base plate rises beyond the preset value, the laser displacement sensor can detect that the weld is not ground flat.

[0018] The lifting assembly includes a hinge 2 and a cylinder 3 hinged to a trolley 1. The piston rod of the cylinder 3 is hinged to the bottom of the hinge 2. A belt drive 4 is installed on the hinge 2, and a grinder 5 is installed at the head end of the hinge 2 and is connected to the belt drive 4. The cylinder drives the hinge 2, which in turn drives the grinder to move up and down to complete the grinding of the weld.

[0019] In addition, both ends of the U-shaped column 8 extend downward in a J-shape. The front and rear sides of the grinder 5 are fixed with locking plates 7 by screws. The locking plates 7 have two semi-circular arches. The locking plates 7 are adapted to the U-shaped column 8 and the J-shaped extension ends. When the screws on the locking plates are loosened, the length of the U-shaped column can be adjusted. At the same time, the angle of the U-shaped column can be adjusted as needed, and the angle of the base plate can be changed.

[0020] Meanwhile, a waist hole is provided on the connecting plate 15, and the connecting rod 11 passes through the waist hole. Its nut 16 is located above the connecting plate 15, and a slot 13 is also provided on the outer side of the connecting rod 11. The slot 13 can be located in the waist hole and locked onto the connecting plate 15. The up and down movement of the connecting rod can also be adjusted by rotating the nut, and the angle of the base plate can also be adjusted accordingly. When not in use, the connecting rod can be lifted up so that the slot is located in the waist hole. The connecting plate can be extended into the slot to limit the connecting rod by moving the connecting rod, thereby allowing the base plate to be retracted.

[0021] The working principle of the above embodiments is as follows:

[0022] The trolley is pushed to the designated position, and then the hinge is moved down by the cylinder. After the grinder moves down to the designated position, the connecting rod is moved to separate the groove from the connecting plate. Under the elastic force of the spring, the connecting rod moves down by pushing the limiting protrusion. At the same time, the base plate is also moved down, so that the roller is close to the ground. At the same time, the laser displacement sensor is activated. After the grinder grinds the weld seam flat, the trolley moves and the roller presses on the ground weld seam. If the weld seam is not ground flat, the roller will drive the connecting rod on the base plate to change the angle of the base plate. Then, in conjunction with the laser displacement sensor, the grinding position can be detected by the change in the angle of the base plate to see if the grinding is flat.

[0023] The entire workflow is now complete, and anything not described in detail in this specification is existing technology known to those skilled in the art.

[0024] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A weld grinding apparatus for a steel box girder, characterized by: The polishing machine (5) is installed on the trolley (1), and the belt drive (4) is used to drive the polishing machine (5) to rotate. The polishing machine (5) is provided with a laser displacement sensor (17) on the shell, and a U-shaped column (8) is arranged, the inner side of the U-shaped column (8) is fixedly connected with a connecting plate (15), the tail end is movably connected with a bottom plate (9), the bottom plate (9) is hingedly connected with a connecting rod (11) penetrating through the connecting plate (15) and a roller (10) installed thereon, the outer side of the connecting rod (11) is above the connecting plate (15) and is threadedly connected with a nut (16), the outer side of the connecting rod (11) forms a limiting block (12), and the outer side is further sleeved with a spring (14) located between the limiting block (12) and the connecting plate (15).

2. The steel box girder weld polishing apparatus according to claim 1, characterized by: The outer side of the polishing machine (5) is fixedly connected with a locking piece (7) through a screw, the locking piece (7) is formed with two semicircular arc surfaces, and the both ends of the U-shaped column (8) are extended in J shape, and the U-shaped column (8) and the J-shaped extended end are matched with the semicircular arc surfaces of the locking piece (7).

3. The steel box girder weld polishing apparatus according to claim 2, characterized by: The connecting plate (15) is provided with a waist hole, and the top end of the connecting rod (11) penetrates through the waist hole and is provided with a slot (13) which can be clamped on the connecting plate (15) on the outer side.

4. The steel box girder weld polishing apparatus according to claim 1, characterized by: The inner side of the trolley (1) is hingedly connected with a hinged frame (2), and a cylinder (3) is hingedly connected, the piston rod of the cylinder (3) is hingedly connected with one end of the hinged frame (2), and the polishing machine (5) and the belt drive (4) are installed on the hinged frame (2).

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