A kind of auxiliary device for spray painting prefabricated steel beams of bridge

Abstract

The invention discloses a painting auxiliary device for prefabricated steel beams of a bridge, comprising a connecting beam, wherein the lower end of the connecting beam is provided with an axle rod, and two stepper motors are symmetrically installed on the lower surface of the connecting beam, and a second transmission gear is installed at the end of the output shaft at the outer end of the stepper motor, and the second transmission gear is meshed with the first transmission gear at the lower end, and the first transmission gear is installed on the axle rod; a wide gear is installed on the axle rod located between the first connecting plate and the second connecting plate, and a high-strength cloth belt is sleeved on the wide gear, and a transmission chain arranged in the upper end of the high-strength cloth belt is meshed with the wide gear. Compared with the prior art, the advantage of the invention is that during the painting process, after the prefabricated steel beam is lifted, the axle rod and the wide gear are driven to rotate by the rotation of the stepper motor, and when the wide gear rotates, the transmission chain meshed with the wide gear also moves. At this time, the angle of the prefabricated steel beam held by the high-strength cloth belt is tilted, and the bottom surface can be tilted outward or upward, so that the bottom surface is convenient for painting.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated steel beam spray painting, in particular to a prefabricated steel beam spray painting auxiliary device for bridges. Background Art

[0002] In the process of bridge construction, a large number of prefabricated steel beams are used. Prefabricated steel beams play an important role in the main structure of the bridge, bearing large loads, and are key load-bearing components. Therefore, the weight and volume of prefabricated steel beams are very large. Generally, large prefabricated steel beams can weigh about five tons.

[0003] During prefabrication in the factory, the steel beams need to be painted to enhance the corrosion resistance of the beams. The six sides of the steel beams need to be painted. Currently, during the painting construction, the steel beams are mainly placed on the ground, and after the exposed surface is painted, the steel beams are turned over with the help of mechanical force, and the bottom surface is painted. However, due to the heavy weight of the steel beams, it is very troublesome and laborious to turn the steel beams over, and large-scale construction machinery is required. In addition, the painted surface is easily damaged during the turning process, which affects the painting effect and quality of the steel beams. For this reason, we propose a painting auxiliary device for prefabricated steel beams for bridges. Summary of the invention

[0004] The technical problem solved by the present invention is to overcome the problems in the prior art that the painting operation in the production process of prefabricated steel beams for bridges is complicated, troublesome, time-consuming, labor-intensive, and inefficient and of low quality, and to provide a painting auxiliary device for prefabricated steel beams for bridges. The painting auxiliary device for prefabricated steel beams for bridges ensures that the painting of the steel beams is convenient and fast, and improves the quality by hoisting the steel beams and enabling them to be flipped.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A painting auxiliary device for prefabricated steel beams of a bridge, comprising a connecting beam, wherein two lifting rings are symmetrically installed on the upper surface of the connecting beam, and two first connecting plates are symmetrically installed on the lower surfaces of both ends of the connecting beam, and a circular groove is provided on the inner side of the lower end of the first connecting plate, and a first bearing is arranged in the circular groove, and two second connecting plates are symmetrically installed on the lower surface of the connecting beam located at the inner side of the first connecting plate, and a first through hole is provided at the lower end of the second connecting plate, and a second bearing is arranged in the first through hole, and a shaft rod is arranged at the lower end of the connecting beam, and the shaft rod passes through the second bearing and has both ends inserted into the first bearing, and the position of the shaft rod is ensured to be stable by the second bearing and the first bearing, and the friction force during rotation is reduced; two stepping motors are symmetrically installed on the lower surface of the connecting beam located at the inner side of the second connecting plate, and a second transmission gear is installed on the output shaft end of the outer end of the stepping motor, and the second transmission gear is meshed with the first transmission gear at the lower end, and the first transmission gear is installed on the shaft rod, and the second transmission gear and the first transmission gear are driven to rotate by the rotation of the stepping motor, thereby driving the shaft rod to rotate;

[0006] A wide gear is installed on the shaft between the first connecting plate and the second connecting plate, and a high-strength cloth belt is sleeved on the wide gear. The high-strength cloth belt is made of high-strength aramid material and has steel wire embedded inside to further improve the strength; a transmission chain is arranged inside the upper end of the high-strength cloth belt, and the transmission chain is meshed with the wide gear. The two ends of the high-strength cloth belt are connected to the connecting nuts through connecting bolts, and the connecting bolts pass through the two ends of the high-strength cloth belt and are threadedly connected to the connecting nuts;

[0007] An electric push rod is installed at the lower end of the second connecting plate, and a rubber block is installed at the bottom of the telescopic rod at the lower end of the electric push rod.

[0008] Preferably, the stepper motor and the electric push rod are both electrically connected to a PLC controller, and the PLC controller is installed on the side of the connecting beam. The actuation of the stepper motor and the electric push rod can be controlled by programming the PLC controller.

[0009] Preferably, a third connecting plate is also installed on the lower surface of the connecting beam located on the inner side of the second connecting plate, and a second through hole is opened at the lower end of the third connecting plate. A bushing is arranged in the second through hole, and the bushing is sleeved outside the shaft rod. The arrangement of the third connecting plate can improve the support for the shaft rod and ensure the stable rotation of the shaft rod.

[0010] Preferably, a pressure sensor is also provided at the bottom of the telescopic rod at the lower end of the electric push rod, and the pressure sensor is electrically connected to the PLC controller. After the telescopic rod is pressed on the steel beam, the pressure sensor detects a pressure signal and transmits it to the PLC controller. After the pressure value detected by the pressure sensor reaches a certain threshold, the PLC controller controls the electric push rod to lock and no longer applies pressure, so as to avoid damage to the high-strength fabric belt due to excessive downward force.

[0011] Preferably, the painting auxiliary device for prefabricated steel beams of a bridge according to claim 1 is characterized in that the connecting beam is an I-beam steel beam, which reduces the weight of the connecting beam while ensuring the strength of the connecting beam.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] When spray painting the prefabricated steel beam, first, lift the connecting beam through two lifting rings using the lifting equipment or hoisting equipment in the factory building, then pass the long ends of the two high-strength cloth tapes through the gap at the bottom of the steel beam and connect them to the short ends through connecting bolts and connecting nuts, so that the high-strength cloth tapes bypass the prefabricated steel beam. At this time, the height of the connecting beam is raised again to lift the prefabricated steel beam, and the lifted prefabricated steel beam is convenient for spray painting.

[0014] During the painting process, the sides are painted first. In order to further facilitate the painting of the bottom and ensure the quality of the painting, the two stepper motors are controlled to rotate, driving the shaft and the wide gear to rotate. When the wide gear rotates, the transmission chain meshing with it also moves. At this time, the angle of the prefabricated steel beam held by the high-strength cloth belt is tilted, and the bottom surface can be tilted outward, making the bottom surface easier to paint.

[0015] After the angle of the prefabricated steel beam is determined, the telescopic rod is controlled to drive the rubber block to extend downward and press on the top of the prefabricated steel beam to prevent the steel beam from driving the high-strength cloth belt to shake, so that the prefabricated steel beam remains in a static state, which is convenient for painting construction.

[0016] The setting of two stepper motors can ensure working stability. When one stepper motor fails to work, the other motor can still keep working.

[0017] The present invention effectively improves the painting efficiency and the painting quality, reduces the operation steps in the painting process, saves time and labor, can be widely used in the current construction of large prefabricated steel beams, and can be further used in automated production lines through control programming to improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereogram of the present invention;

[0019] Figure 2 It is the front view of the present invention;

[0020] Figure 3 It is a cross-sectional view of the structure of the present invention;

[0021] Figure 4 It is a structural cross-sectional view of the wide gear position of the present invention.

[0022] Numbers in the figure: 1. connecting beam, 2. first connecting plate, 201. circular groove, 3. first bearing, 4. second connecting plate, 401. first through hole, 5. second bearing, 6. PLC controller, 7. shaft, 8. first transmission gear, 9. stepping motor, 91. rotating shaft, 10. second transmission gear, 11. wide gear, 12. transmission chain, 13. high-strength cloth belt, 14. connecting bolt, 15. connecting nut, 16. electric push rod, 17. telescopic rod, 18. pressure sensor, 19. rubber block, 20. lifting ring, 21. third connecting plate, 211. second through hole, 22. bushing. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-4 The present invention provides a technical solution: a prefabricated steel beam painting auxiliary device for a bridge, comprising a connecting beam 1, wherein the connecting beam 1 is an I-shaped steel beam, which reduces the weight of the connecting beam 1 and ensures the strength of the connecting beam 1. Two lifting rings 20 are symmetrically installed on the upper surface of the connecting beam 1, and two first connecting plates 2 are symmetrically installed on the lower surfaces of both ends of the connecting beam 1. A circular groove 201 is provided on the inner side of the lower end of the first connecting plate 2, and a first bearing 3 is arranged in the circular groove 201. Two second connecting plates 4 are also symmetrically installed on the lower surface of the connecting beam 1 located at the inner side of the first connecting plate 2, and a first through hole 401 is provided at the lower end of the second connecting plate 4, and a first through hole 401 is provided in the first through hole 401. A second bearing 5 is arranged, and a shaft 7 is arranged at the lower end of the connecting beam 1. The shaft 7 passes through the second bearing 5 and both ends are inserted into the first bearing 3. The second bearing 5 and the first bearing 3 ensure the stability of the position of the shaft 7 and reduce the friction during rotation; two stepping motors 9 are symmetrically installed on the lower surface of the connecting beam 1 located at the inner side of the second connecting plate 4, and a second transmission gear 10 is installed at the output shaft end of the outer end of the stepping motor 9. The second transmission gear 10 is meshed with the first transmission gear 8 at the lower end. The first transmission gear 8 is installed on the shaft 7. The rotation of the stepping motor 9 drives the second transmission gear 10 and the first transmission gear 8 to rotate, thereby driving the shaft 7 to rotate;

[0025] A wide gear 11 is installed on the shaft 7 located between the first connecting plate 2 and the second connecting plate 4, and a high-strength cloth belt 13 is sleeved on the wide gear 11. The high-strength cloth belt 13 is made of high-strength aramid material and has steel wire embedded inside to further improve the strength; a transmission chain 12 is arranged at the upper end of the high-strength cloth belt 13, and the transmission chain 12 is meshed with the wide gear 11. The two ends of the high-strength cloth belt 13 are connected to the connecting nut 15 through the connecting bolt 14, and the connecting bolt 14 passes through the two ends of the high-strength cloth belt 13 and is threadedly connected to the connecting nut 15; when spraying paint, the two high The long end of the strength tape 13 passes through the gap at the bottom of the steel beam and is connected to the short end through the connecting bolt 14 and the connecting nut 15, so that the high-strength tape 13 bypasses the prefabricated steel beam; in the process of painting, the side surface is firstly painted. In order to further facilitate the painting of the bottom surface and ensure the quality of the painting, the two stepper motors 9 are controlled to rotate, driving the shaft rod 7 and the wide gear 11 to rotate. When the wide gear 11 rotates, the transmission chain 12 meshing with it also moves. At this time, the angle of the prefabricated steel beam held by the high-strength tape 13 is tilted, and the bottom surface can be tilted outward or upward, so that the bottom surface is convenient for painting;

[0026] A third connecting plate 21 is also installed on the lower surface of the connecting beam 1 located on the inner side of the second connecting plate 4. A second through hole 211 is opened at the lower end of the third connecting plate 21. A bushing 22 is arranged in the second through hole 211. The bushing 22 is sleeved on the outside of the shaft rod 7. The arrangement of the third connecting plate 21 can improve the support for the shaft rod 7 and ensure the stable rotation of the shaft rod 7.

[0027] An electric push rod 16 is installed at the lower end of the second connecting plate 4, and a rubber block 19 is installed at the bottom of the telescopic rod 17 at the lower end of the electric push rod 16; a pressure sensor 18 is also provided at the bottom of the telescopic rod 17 at the lower end of the electric push rod 16, and the pressure sensor 18 is electrically connected to the PLC controller 6. After the telescopic rod 17 is pressed on the steel beam, the pressure sensor 18 detects a pressure signal and transmits it to the PLC controller 6. After the pressure value detected by the pressure sensor 18 reaches a certain threshold, the PLC controller 6 controls the electric push rod 16 to lock and no longer apply pressure. Add pressure to avoid excessive downward force that may damage the high-strength fabric belt 13; after the angle of the prefabricated steel beam is determined, control the telescopic rod 17 to drive the rubber block 19 to extend downward and press on the top of the prefabricated steel beam to avoid the steel beam driving the high-strength fabric belt 13 to shake, so that the prefabricated steel beam remains in a stationary state, which is convenient for painting construction; the stepper motor 9 and the electric push rod 16 are both electrically connected to the PLC controller 6, and the PLC controller 6 is installed on the side of the connecting beam 1, and the actuation of the stepper motor 9 and the electric push rod 16 can be controlled by programming the PLC controller 6.

[0028] Working principle: When the present invention is used, when the prefabricated steel beam is spray-painted, first, the connection beam 1 is lifted through two lifting rings 20 by the lifting equipment or hoisting equipment in the factory building, and then the long ends of the two high-strength cloth belts 13 are passed through the gap at the bottom of the steel beam and connected with the short ends through the connecting bolts 14 and the connecting nuts 15, so that the high-strength cloth belts 13 bypass the prefabricated steel beam. At this time, the height of the connection beam 1 is raised again, so that the prefabricated steel beam is lifted, and the bottom of the lifted prefabricated steel beam is more convenient for spraying paint;

[0029] During the painting process, the side surface is firstly painted. In order to further facilitate the painting of the bottom surface and ensure the quality of the painting, the two stepper motors 9 are controlled to rotate, driving the shaft 7 and the wide gear 11 to rotate. When the wide gear 11 rotates, the transmission chain 12 meshing with it also moves. At this time, the angle of the prefabricated steel beam held by the high-strength cloth belt 13 is tilted, and the bottom surface can be tilted outward or upward, making the bottom surface convenient for painting;

[0030] After the angle of the prefabricated steel beam is determined, the telescopic rod 17 is controlled to drive the rubber block 19 to extend downward and press on the top of the prefabricated steel beam to prevent the steel beam from driving the high-strength cloth belt 13 to shake, so that the prefabricated steel beam remains in a static state, which is convenient for painting construction.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A painting auxiliary device for prefabricated steel beams of a bridge, comprising a connecting beam (1), characterized in that: Two lifting rings (20) are symmetrically mounted on the upper surface of the connecting beam (1); two first connecting plates (2) are symmetrically mounted on the lower surfaces of both ends of the connecting beam (1); a circular groove (201) is provided on the inner side of the lower end of the first connecting plate (2); a first bearing (3) is arranged in the circular groove (201); two second connecting plates (4) are symmetrically mounted on the lower surface of the connecting beam (1) located inside the first connecting plate (2); a first through hole (401) is provided at the lower end of the second connecting plate (4); a first bearing (3) is arranged in the first through hole (401); A second bearing (5) is provided; a shaft (7) is provided at the lower end of the connecting beam (1); the shaft (7) passes through the two second bearings (5) and has both ends inserted into the first bearing (3); two stepper motors (9) are symmetrically mounted on the lower surface of the connecting beam (1) located at the inner side of the second connecting plate (4); a second transmission gear (10) is mounted on the end of the output shaft at the outer end of the stepper motor (9); the second transmission gear (10) is meshed with the first transmission gear (8) at the lower end; the first transmission gear (8) is mounted on the shaft (7); A wide gear (11) is mounted on the shaft (7) between the first connecting plate (2) and the second connecting plate (4); a high-strength cloth belt (13) is sleeved on the wide gear (11); a transmission chain (12) is arranged inside the upper end of the high-strength cloth belt (13); the transmission chain (12) is meshed with the wide gear (11); and both ends of the high-strength cloth belt (13) are connected to connection nuts (15) via connection bolts (14); An electric push rod (16) is installed at the lower end of the second connecting plate (4), and a rubber block (19) is installed at the bottom of the telescopic rod (17) at the lower end of the electric push rod (16); The stepper motor (9) and the electric push rod (16) are both electrically connected to a PLC controller (6), and the PLC controller (6) is mounted on a side of the connecting beam (1); A third connecting plate (21) is also installed on the lower surface of the connecting beam (1) located inside the second connecting plate (4); a second through hole (211) is opened at the lower end of the third connecting plate (21); a bushing (22) is arranged in the second through hole (211); the bushing (22) is sleeved outside the shaft rod (7); A pressure sensor (18) is also provided at the bottom of the telescopic rod (17) at the lower end of the electric push rod (16), and the pressure sensor (18) is electrically connected to the PLC controller (6).

2. The auxiliary device for spray painting prefabricated steel beams of a bridge according to claim 1, characterized in that: The connecting beam (1) is an I-shaped steel beam.

3. The auxiliary device for painting prefabricated steel beams of a bridge according to claim 1, characterized in that: When in use, the side and upper end surfaces of the prefabricated steel beam are spray-painted; then, the connecting beam is lifted through two lifting rings by the lifting equipment or hoisting equipment in the factory building, and then the long ends of the two high-strength cloth belts are passed through the gap at the bottom of the prefabricated steel beam and connected with the short ends through connecting bolts and connecting nuts, so that the high-strength cloth belts bypass the prefabricated steel beam. At this time, the height of the connecting beam is raised again to lift the prefabricated steel beam; When painting the bottom surface, in order to further facilitate the painting of the bottom surface and ensure the quality of the painting, the two stepper motors are controlled to rotate, driving the shaft and the wide gear to rotate. When the wide gear rotates, the transmission chain meshing with it also moves. At this time, the angle of the prefabricated steel beam held by the high-strength cloth belt is tilted. When the stepper motor continues to rotate, the bottom surface of the prefabricated steel beam can face outward and upward, making the bottom surface easy to paint.

4. The auxiliary device for spray painting prefabricated steel beams of a bridge according to claim 3, characterized in that: After the angle of the prefabricated steel beam is determined, the telescopic rod is controlled to drive the rubber block to extend downward and press on the top of the prefabricated steel beam to prevent the steel beam from driving the high-strength cloth belt to shake, so that the prefabricated steel beam remains in a static state, which is convenient for painting construction.

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