A ring motion mechanism for main arch connecting segment welding of large-span arch bridge

Abstract

The application discloses a ring motion mechanism for welding of a main arch connecting segment of a large-span arch bridge, and relates to the technical field of welding equipment. The ring motion mechanism comprises a track mechanism and a walking mechanism. The track mechanism is composed of a plurality of spliced tracks which are in contact with each other at the head and tail to form a ring shape, and a positioning assembly for connection is arranged between two adjacent spliced tracks. The outer side of the spliced track is provided with a walking mechanism for movement. The walking mechanism comprises a fixing frame, an auxiliary wheel, a transmission shaft, a bearing fixing seat and a driving wheel. The top and bottom of one side of the fixing frame are rotatably connected with the auxiliary wheels at both ends. The inner sides of the top and bottom of the fixing frame are fixed with the bearing fixing seats. The inner sides of the bearing fixing seats are rotatably connected with the transmission shafts. Through cooperation of the track mechanism, the walking mechanism, the positioning assembly and the limiting assembly, the walking mechanism can drive the welding equipment to realize stable ring motion on the main arch connecting segment of the large-span arch bridge.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of welding equipment, and particularly relates to a ring-shaped motion mechanism for the outer side of a main arch connecting segment of a large-span arch bridge. BACKGROUND

[0002] When the main arch segments of a large-span arch bridge are connected, the arch ribs are often fixed through inner flanges, and the gaps between the arch ribs are often connected through welding. The arch ribs are the main load-bearing structure of the large-span arch bridge, and the welding quality directly affects the structural stress of the whole bridge. The deformation caused by welding will affect the linear type of the arch ribs, and even damage the load-bearing capacity of the arch ribs. At present, the welding of the main arch segments of a large-span arch bridge is all manual, and there are problems such as high welding risk, low welding efficiency and small working space during high-altitude operation. In addition, the parameters such as the working angle of the welding gun, the moving speed of the welding gun and the wire feeding speed cannot be controlled during manual welding, which leads to poor welding quality at the connection of the main arch of the large-span arch bridge, thereby affecting the durability and fatigue performance of the bridge steel structure. Therefore, it is urgent to develop an automatic welding device to improve the welding efficiency and ensure the welding quality.

[0003] Welding robot equipment can replace human operation and is widely used in various industries as a common automatic welding work in the field of welding equipment in some dangerous environments and limited space conditions. Compared with manual welding, it can effectively improve the welding efficiency and welding quality. However, the walking mechanism of the welding robot currently applied in the market is easily disturbed by the harsh environment of high-altitude strong wind and strong pressure during welding operation of a large-span arch bridge, and is accompanied by the key problems of high danger of welding robot fixing method and unstable walking motion, which cannot guarantee the welding quality of the main arch connecting segment of the large-span arch bridge and cannot meet the welding needs of such working environment. Therefore, it is still necessary to design a welding robot walking mechanism that can adapt to the harsh environment of high altitude for the welding process of the main arch connecting segment of the large-span arch bridge, to ensure the safe operation of the welding robot during the welding operation and maintain the stability of the welding gun movement during the welding process, thereby ensuring the welding quality of the main arch connection of the large-span arch bridge and improving the reliability and practicality of the welding robot of the main arch connecting segment of the large-span arch bridge. SUMMARY

[0004] The purpose of the present application is to provide a ring-shaped motion mechanism for welding the main arch connecting segment of a large-span arch bridge to solve the problems raised in the background.

[0005] To solve the above technical problems, the present application is realized by the following technical scheme:

[0006] The application discloses a ring-shaped movement mechanism for welding of a main arch connecting segment of a large-span arch bridge.

[0007] The outer side of the splicing track is provided with a walking mechanism for movement, and the walking mechanism comprises a fixing frame, an auxiliary wheel, a transmission shaft, a bearing fixing seat and a driving wheel.

[0008] Further, the positioning assembly comprises a first connecting plate, a fixing bolt, a second connecting plate and a limiting nut, the inside of the first connecting plate is slidably connected with the fixing bolt, the first connecting plate is slidably connected with the splicing track, the fixing bolt is slidably connected with the splicing track, the outside of the fixing bolt and at the other end of the splicing track is slidably connected with the second connecting plate, the second connecting plate is slidably connected with the splicing track, and the outside of the fixing bolt and at the end, away from the first connecting plate, of the second connecting plate is threadedly connected with the limiting nut.

[0009] Further, the splicing track is in an arc shape.

[0010] Further, the transverse section of the splicing track is in an I shape.

[0011] Further, the inside of the splicing track is fixed with a fixing plate, and the two ends of the fixing plate are provided with limiting assemblies for positioning.

[0012] Further, the two limiting assemblies each comprise an adjusting bolt, a first fixing nut, a second fixing nut and a positioning block, the adjusting bolt is slidably connected with the fixing plate, the outside of the adjusting bolt is threadedly connected with the first fixing nut and the second fixing nut, the first fixing nut is located at the end, close to the fixing plate, of the second fixing nut, and the outside of the adjusting bolt and at the end, away from the first fixing nut, of the second fixing nut is rotatably connected with the positioning block.

[0013] Further, the inside of the end, away from the adjusting bolt, of the positioning block is provided with an arc-shaped groove.

[0014] Further, the inner side of the fixing frame is also provided with a transmission assembly for driving the transmission shaft to rotate, the transmission assembly comprises a reduction motor, a driving bevel gear, a driven bevel gear and a motor support frame, the motor support frame is fixed with the fixing frame, the inner side of the motor support frame is fixed with the reduction motor, the output end of the reduction motor is connected with the driving bevel gear, the bottom end of the driving bevel gear is connected with the driven bevel gear in a meshing mode, and the driven bevel gear is fixed on the outer side of the transmission shaft.

[0015] The present application has the following beneficial effects:

[0016] 1、The track mechanism, the walking mechanism, the positioning assembly and the limiting assembly are cooperated, so that the walking mechanism can drive the welding equipment to realize stable circular motion on the main arch connecting segment of the large-span arch bridge.

[0017] 2、The adjusting bolt, the first fixed nut, the second fixed nut and the positioning block are cooperated, so that when the main arch connecting segment of the large-span arch bridge is positioned on the inner side of the spliced track, the track of the spliced track can be located at the same center, and the welding of the main arch connecting segment of the large-span arch bridge is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a structural schematic view of the present application;

[0020] Figure 2 It is a connection structure schematic view of the spliced track and the fixing frame of the present application;

[0021] Figure 3 It is a connection structure schematic view of the fixing plate and the spliced track of the present application;

[0022] Figure 4 It is a structural schematic view of the limiting assembly of the present application;

[0023] Figure 5 It is a structural schematic view of the positioning assembly of the present application;

[0024] Figure 6 It is a structural schematic view of the walking mechanism of the present application;

[0025] Figure 7 It is a structural schematic view of the fixing frame of the present application.

[0026] In the drawings, the components represented by each number are listed as follows:

[0027] 1, large-span arch bridge main arch connecting segment; 2, splicing track; 3, fixed plate; 4, fixed frame; 5, first connecting plate; 6, adjusting bolt; 7, first fixed nut; 8, second fixed nut; 9, positioning block; 10, fixed bolt; 11, second connecting plate; 12, limiting nut; 13, auxiliary wheel; 14, speed reducer motor; 15, driving bevel gear; 16, driven bevel gear; 17, transmission shaft; 18, bearing fixing seat; 19, driving wheel; 20, motor support frame. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Please refer to Figures 1-7 As shown in the drawings, the present application is a kind of annular motion mechanism for large-span arch bridge main arch connecting segment welding, including track mechanism and walking mechanism, the track mechanism is installed on the outside of large-span arch bridge main arch connecting segment 1, the track mechanism is composed of multiple splicing tracks 2, the shape of splicing track 2 is arc, the cross section of splicing track 2 is I-shaped, multiple splicing tracks 2 are in contact at the tail to form a ring, in turn can form a circular shape of a solid of revolution through the splicing of multiple splicing tracks 2, a positioning assembly for connecting is installed between adjacent two splicing tracks 2, the inner side of splicing track 2 is fixed with fixed plate 3, the both ends of fixed plate 3 are installed with limiting assembly for positioning large-span arch bridge main arch connecting segment 1, the outer side of splicing track 2 is installed with walking mechanism for moving;

[0030] The positioning assembly first connecting plate 5, fixed bolt 10, second connecting plate 11 and limiting nut 12, the inside of first connecting plate 5 is slidably connected with fixed bolt 10, and first connecting plate 5 is slidably connected with splicing track 2, so that first connecting plate 5 can be installed on the inner side of one end of splicing track 2, fixed bolt 10 is slidably connected with splicing track 2, in turn can be when adjacent two splicing tracks 2 contact respectively into the inner side of adjacent two splicing tracks 2 through sliding connection of multiple fixed bolts 10, the outer side of fixed bolt 10 and located at the other end of splicing track 2 is slidably connected with second connecting plate 11, and second connecting plate 11 is slidably connected with splicing track 2, the outer side of fixed bolt 10 and located at the end of second connecting plate 11 away from first connecting plate 5 is threadedly connected with limiting nut 12, so that the adjacent two splicing tracks 2 can be fixed through the clamping of first connecting plate 5 and second connecting plate 11 and the cooperation of fixed bolt 10;

[0031] When the plurality of spliced tracks 2 need to be spliced into a ring shape, the first end of one of the plurality of arc-shaped spliced tracks 2 is contacted with the second end of another spliced track 2, and then the centers of the plurality of spliced tracks 2 are overlapped, so that the arc-shaped spliced tracks 2 can form a circular shape. Then, the first connecting plate 5 and the second connecting plate 11 are respectively installed on the inner sides of the two ends of the adjacent two spliced tracks 2 through sliding connection, and then the fixed bolts 10 are penetrated through the first connecting plate 5, the spliced track 2 and the second connecting plate 11 through sliding connection between the fixed bolts 10 and the first connecting plate 5, between the fixed bolts 10 and the spliced track 2, and between the fixed bolts 10 and the second connecting plate 11. Then, the limiting nuts 12 are installed on the outer sides of the fixed bolts 10 through threaded connection, so as to fix the contact between the adjacent two spliced tracks 2.

[0032] In this embodiment, the number of fixed bolts 10 is six. In other embodiments, the number of fixed bolts 10 can be determined according to the connection stability requirements of the adjacent two spliced tracks 2. The number of limiting nuts 12 corresponds to the number of fixed bolts 10.

[0033] Please refer to Figure 3 and Figure 5 As shown, each of the two limiting assemblies comprises an adjusting bolt 6, a first fixed nut 7, a second fixed nut 8 and a positioning block 9. The adjusting bolt 6 is in sliding connection with the fixed plate 3 and can rotate on the inner side of the fixed plate 3 through the rotary body shape of the adjusting bolt 6. The outer side of the adjusting bolt 6 is in threaded connection with the first fixed nut 7 and the second fixed nut 8. The first fixed nut 7 is located at the end of the second fixed nut 8 close to the fixed plate 3, so that when the first fixed nut 7 is in threaded connection with the outer side of the adjusting bolt 6 and contacts with the fixed plate 3, the adjusting bolt 6 cannot rotate. The outer side of the adjusting bolt 6 and the end of the second fixed nut 8 away from the first fixed nut 7 are in rotational connection with the positioning block 9, so that when the second fixed nut 8 contacts with the positioning block 9, the rotation of the adjusting bolt 6 can only drive the rotation of the positioning block 9. When the second fixed nut 8 does not contact with the positioning block 9, the length position of the positioning block 9 on the adjusting bolt 6 can be adjusted by rotating the adjusting bolt 6 or the positioning block 9. The inner side of the end of the positioning block 9 away from the adjusting bolt 6 is provided with an arc-shaped groove, and the positioning block 9 contacts with the main arch connecting segment 1 of the long-span arch bridge through the arc-shaped groove, so as to support the main arch connecting segment 1 of the long-span arch bridge.

[0034] When it is needed to clamp the outer side of the main arch connecting segment 1 of the long-span arch bridge stably, the first fixed nut 7 is rotated to have a gap between the first fixed nut 7 and the fixed plate 3, then the second fixed nut 8 is rotated to have a gap between the second fixed nut 8 and the positioning block 9, then the rotating adjusting bolt 6 or the positioning block 9 is rotated, so that the positioning block 9 moves outside the rotating adjusting bolt 6, and then the position of the positioning block 9 is adjusted to clamp the coaxiality of the main arch connecting segment 1 of the long-span arch bridge and the splicing track 2.

[0035] Please refer to Figures 6-7 As shown in the drawings, the walking mechanism includes the fixed frame 4, the auxiliary wheel 13, the transmission shaft 17, the bearing fixing seat 18 and the driving wheel 19, the two ends of the top and the bottom of one side of the fixed frame 4 are rotatably connected with the auxiliary wheel 13, so that the auxiliary wheel 13 can be located on the inner side of the splicing track 2, the inner sides of the top and the bottom of the fixed frame 4 are fixed with the bearing fixing seat 18, the inner side of the bearing fixing seat 18 is rotatably connected with the transmission shaft 17, so that the height of the transmission shaft 17 can be supported through the rotating connection of the transmission shaft 17 and the bearing fixing seat 18, the two ends of the transmission shaft 17 are fixed with the driving wheel 19, and the driving wheel 19 is made of antiskid material, so that the rotation of the transmission shaft 17 can drive the driving wheel 19 to rotate, and then the fixed frame 4 can rotate around the splicing track 2 through the rotation of the driving wheel 19 by the contact of the auxiliary wheel 13 with the inner side of the splicing track 2 and the contact of the driving wheel 19 with the outer side of the splicing track 2;

[0036] The inner side of the fixed frame 4 is also provided with a transmission assembly for driving the transmission shaft 17 to rotate, the transmission assembly includes the reduction motor 14, the driving bevel gear 15, the driven bevel gear 16 and the motor support frame 20, the motor support frame 20 is fixed with the fixed frame 4, the inner side of the motor support frame 20 is fixed with the reduction motor 14, so that the position of the reduction motor 14 can be fixed, the output end of the reduction motor 14 is connected with the driving bevel gear 15, the bottom end of the driving bevel gear 15 is meshingly connected with the driven bevel gear 16, and the driven bevel gear 16 is fixed on the outer side of the transmission shaft 17, so that the transmission shaft 17 can be driven to rotate through the rotation of the driven bevel gear 16, and the power of the transmission can be ensured through the bidirectional rotation of the two fixed frames 4;

[0037] Preferably, the reduction motor 14 is a direct current stepping motor, which has existing common and mature technology, and the embodiment will not be described one by one.

[0038] Preferably, the reduction motor 14 is provided with an embedded single-chip microcomputer board inside, so that the embedded single-chip microcomputer board can control the reduction motor to drive the main shaft to rotate to drive the walking mechanism to drive the welding equipment; the embedded single-chip microcomputer board is a common and mature technology in the field, and the embodiment will not be described one by one.

[0039] When the external welding equipment needs to be moved, it is fixed with the fixed frame 4, then the auxiliary wheel 13 is installed on the inner side of one of the spliced tracks 2 which is not spliced, at the same time the auxiliary wheel 13 and the driving wheel 19 are in contact with the inner side and the outer side of the spliced track 2, then the plurality of spliced tracks 2 are spliced, the speed reducer motor 14 is electrically connected with the external power source, so that the speed reducer motor 14 drives the driving bevel gear 15 to rotate, the driving bevel gear 15 drives the driven bevel gear 16 connected with it to rotate, the rotation of the driven bevel gear 16 drives the driving wheel 19 through the transmission shaft 17, and the rotation of the driving wheel 19 drives the fixed frame 4 to move in a ring shape on the outer side of the spliced track 2.

[0040] The installation and working principle of the present application are as follows: first, the spliced tracks are installed on the outer side of the large-span arch bridge connecting segment through the positioning assembly to form a ring track mechanism, the plurality of spliced tracks are connected through the first connecting plate 5, the second connecting plate 11, the fixed bolt 10, the second connecting plate 11 and the limiting nut 12, and can realize clamping of different diameter pipes by adjusting the relative positions of the first fixed nut 7 and the second fixed nut 8, the running mechanism cooperates with the track mechanism, the driving wheel and the auxiliary wheel clamp the track mechanism to ensure that the running mechanism has sufficient supporting force in the ring movement, and the auxiliary wheels on the connecting plates on both sides of the running mechanism are used to prevent the running mechanism from generating displacement along the axial direction of the main arch connecting segment of the large-span arch bridge in the welding task, thereby ensuring the stability of the welding equipment in the welding process. Further, the embedded single-chip microcomputer board is used to control the rotation of the main shaft driven by the speed reducer motor to drive the running mechanism to drive the welding equipment, and the ring movement of the running mechanism along the track mechanism is realized in combination with the clamping effect of the auxiliary wheel, thereby improving the reliability of the ring movement mechanism in the welding operation process.

[0041] In the description of the present application, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and limit the present application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present specification. The present specification selects and describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited by the claims and the entire scope and equivalents thereof.

Claims

1. A ring motion mechanism for main arch connecting segment welding of long-span arch bridge, characterized in that, The utility model provides a kind of large-span arch bridge main arch connecting section positioning device, including track mechanism and walking mechanism, the track mechanism is made of multiple spliced tracks (2), multiple the spliced track (2) is in contact to form annular at head and tail, and positioning assembly for connecting is installed between adjacent two spliced tracks (2); The outer side of the spliced track (2) is provided with a walking mechanism for moving, which comprises a fixed frame (4), an auxiliary wheel (13), a transmission shaft (17), a bearing fixing seat (18), and a drive wheel (19). The fixed frame (4) is rotatably connected with an auxiliary wheel (13) at both ends of the top and bottom of one side. The inner side of the top and bottom of the fixed frame (4) is fixed with a bearing fixing seat (18). The inner side of the bearing fixing seat (18) is rotatably connected with a transmission shaft (17). Both ends of the transmission shaft (17) are fixed with a drive wheel (19). The positioning assembly comprises a first connecting plate (5), a fixed bolt (10), a second connecting plate (11), and a limiting nut (12). The inside of the first connecting plate (5) is slidably connected with a fixed bolt (10), and the first connecting plate (5) is slidably connected with the spliced track (2). The fixed bolt (10) is slidably connected with the spliced track (2). The outer side of the fixed bolt (10) and the other end of the spliced track (2) are slidably connected with a second connecting plate (11), and the second connecting plate (11) is slidably connected with the spliced track (2). The outer side of the fixed bolt (10) and the end of the second connecting plate (11) away from the first connecting plate (5) are threadedly connected with a limiting nut (12). The cross-section of the spliced track (2) is H-shaped. The first connecting plate (5) and the second connecting plate (11) are installed on the inner side of both ends of the adjacent two spliced tracks (2) and are fixed by the limiting nut (12) and the fixed bolt (10). The inner side of the spliced track (2) is fixed with a fixed plate (3). Both ends of the fixed plate (3) are provided with a limiting assembly for positioning. Both limiting assemblies comprise an adjusting bolt (6), a first fixed nut (7), a second fixed nut (8), and a positioning block (9). The adjusting bolt (6) is slidably connected with the fixed plate (3). The outer side of the adjusting bolt (6) is threadedly connected with a first fixed nut (7) and a second fixed nut (8). The first fixed nut (7) is located at the end of the second fixed nut (8) close to the fixed plate (3). The outer side of the adjusting bolt (6) and the end of the second fixed nut (8) away from the first fixed nut (7) are rotatably connected with a positioning block (9). By adjusting the cooperation of the adjusting bolt (6), the first fixed nut (7), the second fixed nut (8), and the positioning block (9), the large-span arch bridge main arch connecting section can be positioned on the inner side of the spliced track (2), and the spliced track (2) can be connected with multiple spliced tracks (2) at the same center. The inner side of the fixing frame (4) is further provided with a transmission assembly for driving the transmission shaft (17) to rotate, the transmission assembly comprises a reduction motor (14), a driving bevel gear (15), a driven bevel gear (16) and a motor support frame (20), the motor support frame (20) is fixed with the fixing frame (4), the inner side of the motor support frame (20) is fixed with the reduction motor (14), the output end of the reduction motor (14) is connected with the driving bevel gear (15), the bottom end of the driving bevel gear (15) is meshedly connected with the driven bevel gear (16), and the driven bevel gear (16) is fixed on the outer side of the transmission shaft (17); the transmission shaft (17) drives the driving wheel (19) to rotate; the auxiliary wheel (13) is in contact with the inner side of the spliced track (2), and the driving wheel (19) is in contact with the outer side of the spliced track (2).

2. The ring-shaped movement mechanism for the main arch connecting segment welding of a long-span arch bridge according to claim 1, characterized in that, The shape of the spliced track (2) is arc-shaped.

3. The ring-shaped movement mechanism for the main arch connecting segment welding of long-span arch bridge according to claim 1, characterized in that, An arc-shaped groove is formed in the inner side of the end of the positioning block (9) away from the adjusting bolt (6).

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