Road and bridge expansion joint welding device

Abstract

The invention discloses a road and bridge expansion joint welding device, which belongs to the technical field of expansion joint welding, and comprises a hollow expansion joint with two wing plate parts and a hollow part, and further comprises a fixing plate, and a jacking plate used for being inserted into the hollow part is movably and telescopically arranged at the center of the top of the fixing plate. L-shaped plates are rotationally arranged on the left side and the right side of the top of the fixing plate correspondingly, rotating shafts are fixedly connected to the bottom ends of the L-shaped plates, the rotating shafts are rotationally arranged between two fixing bases, and the two fixing bases are fixedly installed on the top of the fixing plate. The end portion of the hollow expansion joint is placed on the fixing plate, the inner top wall of the hollow portion of the hollow expansion joint can be tightly jacked through the stretching-out jacking plate, the two wing plate portions of the hollow expansion joint can be tightly pressed through the two L-shaped plates rotating inwards, and therefore effective fixing and limiting of the hollow expansion joint are achieved. And the hollow expansion joint is prevented from deviating in the welding process, and the welding stability is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of expansion joint welding, and particularly to a welding device for road and bridge expansion joints. Background Art

[0002] The expansion joints of road and bridges are key components in bridge structures. They are set between the movable ends of the upper structures of bridges, abutments, and adjacent upper structures, aiming to adapt to the expansion and contraction deformations of the beam bodies under the actions of vehicle loads, temperature changes, concrete shrinkage and creep, etc., and ensure the normal use of the bridge structures. The expansion joints can effectively prevent problems such as vehicle jumping and noise when vehicles pass through, and guarantee the comfort and safety of driving. There are various types of expansion joints, including comb-shaped, modular, rubber-type, etc., which can be reasonably selected according to the bridge span, deformation amount, design requirements, etc., and need to have good waterproof, durable, displacement-resistant and other properties to cope with complex traffic and environmental conditions and extend the service life of bridges.

[0003] The welding of road and bridge expansion joints is a key step in the installation of expansion joints, and its purpose is to ensure the firm connection between the expansion joints and the bridge structures and guarantee the normal operation of the expansion joints. Before welding, the steel components need to be cleaned and derusted to ensure that the welding surfaces are free of oil stains, impurities, etc., so as to improve the welding quality. During the welding process, appropriate welding methods, welding materials and welding parameters should be selected according to the design requirements, such as the commonly used arc welding, gas shielded welding, etc. At the same time, the welding sequence and direction should be controlled to avoid welding deformation and ensure the installation accuracy of the expansion joints. After welding, quality inspection of the welds is also required, including appearance inspection, non-destructive testing, etc., to ensure that the strength and density of the welds meet the design requirements, so that the expansion joints can fully play their roles in the expansion and contraction deformations of the bridges and extend the service life of the bridges.

[0004] Since the bridge expansion joints can generally be divided into hollow expansion joints, T-shaped expansion joints and L-shaped expansion joints according to different cross-sectional shapes, in the production and processing of bridge expansion joints, multiple sections of expansion joints need to be welded to form a whole. However, in the prior art, when welding bridge expansion joints, there is no equipment that can stably limit the bridge expansion joints to prevent them from shifting, resulting in the bridge expansion joints being prone to skew due to external forces during welding, thereby reducing the processing quality of the bridge expansion joints and increasing the rejection rate at the same time.

[0005] Therefore, a welding device for road and bridge expansion joints is proposed to solve or alleviate the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the deficiencies in the prior art and propose a welding device for road and bridge expansion joints.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions: A welding device for a road and bridge expansion joint, including a hollow expansion joint having two wing plate parts and a hollow part, and further including a fixing plate. At the center of the top of the fixing plate, a pressing plate for inserting into the hollow part is movably and telescopically arranged. On both the left and right sides of the top of the fixing plate, L-shaped plates are rotatably arranged. The bottom end of the L-shaped plate is fixedly connected with a rotating shaft, and the rotating shaft is rotatably arranged between two fixing seats. Both of the two fixing seats are fixedly installed on the top of the fixing plate. On the opposite sides of the two L-shaped plates, telescopic sleeves are fixedly installed, and a telescopic block for pressing the wing plate part is movably and telescopically arranged in the telescopic sleeve.

[0008] Preferably, a first spring is fixedly arranged between the side of the telescopic block facing the L-shaped plate and the inner side wall of the telescopic sleeve, and the telescopic block is made of rubber material.

[0009] Preferably, the bottom end of the pressing plate is detachably installed on an inner plate. The inner plate is movably arranged in a movable cabinet, and the movable cabinet is slidably arranged in a vertical groove. The vertical groove is vertically opened on the top of the fixing plate. A second spring is also fixedly arranged between the bottom of the inner plate and the inner bottom wall of the movable cabinet.

[0010] Preferably, a magnetic block is fixedly arranged at the bottom end of the pressing plate, and the magnetic block adsorbs on the inner plate.

[0011] Preferably, the outer wall of the movable cabinet is fixedly connected with a nut through a connecting block. The inner wall of the nut is threadedly connected with a lead screw. The lead screw is rotatably arranged in a rotating cavity, and the rotating cavity is opened inside the fixing plate. A driving motor is also fixedly arranged on the inner bottom wall of the rotating cavity, and the lead screw is fixedly installed on the top of the output shaft of the driving motor.

[0012] Preferably, a worm gear is also fixedly installed on the rotating shaft. The outer wall of the worm gear is engaged with a worm. One end of the worm is rotatably arranged on the inner side wall of a rod groove, and the other end of the worm is fixedly connected with a horizontal shaft. A linkage mechanism is arranged between the lead screw and the horizontal shaft. When the lead screw rotates, the horizontal shaft can be synchronously driven to rotate through the linkage mechanism.

[0013] Preferably, the linkage mechanism includes a driving wheel, a synchronous belt, a driven wheel, a vertical shaft, a first bevel gear and a second bevel gear. A driving wheel is also fixedly installed on the lead screw. The outer wall of the driving wheel is connected with a driven wheel through a synchronous belt. A vertical shaft is fixedly installed at the center of the driven wheel, and the vertical shaft is rotatably arranged in a shaft groove. The shaft groove is opened inside the fixing plate. The top end of the vertical shaft is fixedly installed with a first bevel gear, and the outer wall of the first bevel gear is engaged with a second bevel gear. The second bevel gear is fixedly installed on the horizontal shaft.

[0014] The present invention also provides a method for using a welding device for a road and bridge expansion joint, including the following steps: S1. Place the end of the hollow expansion joint on the fixed plate, and make the hollow part of the hollow expansion joint cover the pressing plate on the top of the fixed plate; S2. Control the driving motor to operate. On the one hand, make the pressing plate extend through the transmission, and on the other hand, make the two L-shaped plates rotate inward; S3. The extended pressing plate presses against the inner top wall of the hollow part, and the two inwardly rotating L-shaped plates respectively press against the two wing plate parts, so as to fix the hollow expansion joint.

[0015] The present invention has the following beneficial effects: In the present invention, the end of the hollow expansion joint is placed on the fixed plate. The extended pressing plate can press against the inner top wall of the hollow part of the hollow expansion joint, and the two inwardly rotating L-shaped plates can respectively press against the two wing plate parts of the hollow expansion joint, so as to effectively fix and limit the hollow expansion joint and prevent the hollow expansion joint from shifting during the welding process; In the present invention, the extension of the pressing plate and the rotation of the two L-shaped plates are both driven by the driving motor. There is no need to use multiple sets of driving mechanisms, the control system is simpler, the cost is lower, and at the same time, the fixing effect is effectively guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0017] Figure 1 Is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 Is an enlarged schematic diagram of the fixed plate part in the present invention; Figure 3 Is a cross-sectional view of the fixed plate part in the present invention; Figure 4 Is Figure 3 An enlarged schematic diagram of part A in Figure 5 Is an enlarged schematic diagram of the vertical shaft part in the present invention; Figure 6 Is an enlarged schematic diagram of the L-shaped plate part in the present invention; Figure 7 Is a schematic diagram of the fixed state of the T-shaped expansion joint in the present invention.

[0018] In the figure: 1, hollow expansion joint; 101, wing plate part; 102, hollow part; 2, fixed plate; 3, pressing plate; 4, L-shaped plate; 5, telescopic sleeve; 6, telescopic block; 7, rotating shaft; 8, fixed seat; 9, first spring; 10, magnetic block; 11, inner plate; 12, movable cabinet; 13, second spring; 14, vertical groove; 15, connecting block; 16, nut; 17, rotating cavity; 18, lead screw; 19, driving motor; 20, driving wheel; 21, synchronous belt; 22, driven wheel; 23, vertical shaft; 24, first bevel gear; 25, second bevel gear; 26, horizontal shaft; 27, worm; 28, worm gear; 29, flat part; 30, vertical part. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0021] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships when the product of the present invention is in its normal placement, or the orientation or positional relationships commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0023] In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0024] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "arrangement", "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Embodiment 1: As Figures 1 to 6 , a welding device for a road and bridge expansion joint includes a hollow expansion joint 1 having two wing plate portions 101 and a hollow portion 102, and further includes a fixing plate 2. A pressing plate 3 for inserting into the hollow portion 102 is movably and telescopically arranged at the center of the top of the fixing plate 2; L-shaped plates 4 are rotatably arranged on both the left and right sides of the top of the fixing plate 2. Telescopic sleeves 5 are fixedly installed on the opposite sides of the two L-shaped plates 4. A telescopic block 6 for pressing the wing plate portion 101 is movably and telescopically arranged in the telescopic sleeve 5. In this embodiment, as Figure 3 shown, a first spring 9 is fixedly arranged between the side of the telescopic block 6 facing the L-shaped plate 4 and the inner side wall of the telescopic sleeve 5. The telescopic block 6 is made of rubber; During use, the end of the hollow expansion joint 1 is placed on the fixing plate 2. The extended pressing plate 3 can press against the inner top wall of the hollow portion 102 of the hollow expansion joint 1, and the two inwardly rotated L-shaped plates 4 can respectively press against the two wing plate portions 101 of the hollow expansion joint 1, thereby realizing effective fixation and limitation of the hollow expansion joint 1 and preventing the hollow expansion joint 1 from shifting during the welding process; Under the elastic support of the first spring 9, the telescopic block 6 can retract inward, so as to more effectively press and limit the wing plate portion 101, and at the same time, it will not damage the hollow expansion joint 1.

[0026] As Figure 5 and Figure 6 shown, the bottom end of the L-shaped plate 4 is fixedly connected with a rotating shaft 7. The rotating shaft 7 is rotatably arranged between two fixed seats 8. Both fixed seats 8 are fixedly installed on the top of the fixing plate 2. The L-shaped plate 4 rotates around the rotating shaft 7 (simultaneously with the rotating shaft 7 as the center).

[0027] In this embodiment, as Figure 3 and Figure 4As shown, the bottom end of the pressing plate 3 is detachably installed on the inner plate 11. The inner plate 11 is movably arranged in the movable cabinet 12. The movable cabinet 12 is slidably arranged in the vertical groove 14. The vertical groove 14 is vertically opened at the top of the fixing plate 2. A second spring 13 is also fixedly arranged between the bottom of the inner plate 11 and the inner bottom wall of the movable cabinet 12. Thus, by controlling the up and down movement of the movable cabinet 12, the pressing plate 3 can be driven to move up and down through the inner plate 11 to press against the inner top wall of the hollow part 102. Under the elastic support of the second spring 13, the pressing plate 3 and the inner plate 11 can move downward and compress the second spring 13, so as to be able to adapt to the distance of the up and down movement of the movable cabinet 12. It can not only effectively press against the inner top wall of the hollow part 102, but also will not damage the hollow expansion joint 1.

[0028] As Figure 4 shown, a nut 16 is fixedly connected to the outer wall of the movable cabinet 12 through a connecting block 15. A lead screw 18 is threadedly connected to the inner wall of the nut 16. The lead screw 18 is rotatably arranged in a rotating cavity 17. The rotating cavity 17 is opened inside the fixing plate 2. A driving motor 19 is also fixedly arranged on the inner bottom wall of the rotating cavity 17. The lead screw 18 is fixedly installed on the top of the output shaft of the driving motor 19. When the driving motor 19 operates, it drives the lead screw 18 at the top of its output shaft to rotate. The rotation of the lead screw 18 drives the nut 16 threadedly connected to its outer wall to move up and down. The up and down movement of the nut 16 can drive the movable cabinet 12 to move up and down through the connecting block 15, and then drive the pressing plate 3 to move up and down.

[0029] In this embodiment, as Figure 5 shown, a worm gear 28 is also fixedly installed on the rotating shaft 7. A worm 27 is engaged with the outer wall of the worm gear 28. One end of the worm 27 is rotatably arranged on the inner side wall of the rod groove. The other end of the worm 27 is fixedly connected to a horizontal shaft 26. Controlling the rotation of the horizontal shaft 26 can drive the worm 27 to rotate. The rotation of the worm 27 drives the worm gear 28 engaged with its outer wall to rotate. The rotation of the worm gear 28 can drive the L-shaped plate 4 to rotate through the rotating shaft 7. Thus, controlling the rotation of the horizontal shaft 26 can drive the rotation of the L-shaped plate 4. Therefore, in this embodiment, a linkage mechanism is arranged between the lead screw 18 and the horizontal shaft 26. When the lead screw 18 rotates, the horizontal shaft 26 can be synchronously driven to rotate through the linkage mechanism. The linkage mechanism described in this embodiment specifically includes a driving wheel 20, a synchronous belt 21, a driven wheel 22, a vertical shaft 23, a first bevel gear 24 and a second bevel gear 25. As Figure 4 and Figure 5As shown, a driving wheel 20 is also fixedly installed on the lead screw 18. The outer wall of the driving wheel 20 is connected to a driven wheel 22 through a synchronous belt 21. A vertical shaft 23 is fixedly installed at the center of the driven wheel 22. The vertical shaft 23 is rotatably arranged in a shaft groove. The shaft groove is opened inside the fixed plate 2. A first bevel gear 24 is fixedly installed at the top end of the vertical shaft 23. The outer wall of the first bevel gear 24 meshes with a second bevel gear 25. The second bevel gear 25 is fixedly installed on a horizontal shaft 26; Thus, when the driving motor 19 operates to drive the rotation of the lead screw 18, the lead screw 18 will also drive the driving wheel 20 to rotate. The driving wheel 20 rotates to drive the driven wheel 22 to rotate through the synchronous belt 21. The driven wheel 22 rotates to drive the first bevel gear 24 to rotate through the vertical shaft 23. The rotation of the first bevel gear 24 drives the second bevel gear 25 meshing with its outer wall to rotate. The rotation of the second bevel gear 25 can drive the horizontal shaft 26 to rotate; Thus, in this embodiment, the extension of the pressing plate 3 and the rotation of the two L-shaped plates 4 are both driven by the driving motor 19. There is no need to use multiple sets of driving mechanisms. The control system is simpler, the cost is lower, and at the same time, the fixing effect is effectively guaranteed.

[0030] Embodiment Two: As Figure 7 , on the basis of Embodiment One, a magnetic block 10 is fixedly arranged at the bottom end of the pressing plate 3 in this embodiment. The pressing plate 3 is adsorbed on the inner plate 11 through the magnetic block 10, so as to facilitate the disassembly of the pressing plate 3. When the pressing plate 3 is installed, it is convenient to fix the hollow expansion joint 1; When the pressing plate 3 is disassembled, as Figure 7 shown, it is convenient to fix the T-shaped expansion joint. The T-shaped expansion joint has a flat part 29 and a vertical part 30. Through the two L-shaped plates 4, the two flat parts 29 of the T-shaped expansion joint can be respectively pressed, so as to achieve the effect of stably fixing the T-shaped expansion joint, and the applicability is also stronger.

[0031] Embodiment Three: As Figures 1 to 6 , a usage method of a welding device for a road and bridge expansion joint is provided in this embodiment, which specifically includes the following steps: Step One: Place the end of the hollow expansion joint 1 on the fixed plate 2, and make the hollow part 102 of the hollow expansion joint 1 cover the pressing plate 3 at the top of the fixed plate 2; Step Two: Control the driving motor 19 to operate. On the one hand, the pressing plate 3 is extended through the transmission, and on the other hand, the two L-shaped plates 4 are rotated inward; Step Three: The extended pressing plate 3 presses against the inner top wall of the hollow part 102, and the two inwardly rotated L-shaped plates 4 respectively press against the two wing plate parts 101, so as to fix the hollow expansion joint 1.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A welding device for road and bridge expansion joints, characterized in that, It includes a hollow expansion joint (1) having two wing plate parts (101) and a hollow part (102), and further includes a fixing plate (2). At the center of the top of the fixing plate (2), a pressing plate (3) for inserting into the hollow part (102) is movably and telescopically arranged. On both the left and right sides of the top of the fixing plate (2), L-shaped plates (4) are rotatably arranged. The bottom end of the L-shaped plate (4) is fixedly connected to a rotating shaft (7), and the rotating shaft (7) is rotatably arranged between two fixed seats (8). Both of the two fixed seats (8) are fixedly installed on the top of the fixing plate (2). On the opposite sides of the two L-shaped plates (4), telescopic sleeves (5) are fixedly installed. Inside the telescopic sleeve (5), a telescopic block (6) for pressing the wing plate part (101) is movably and telescopically arranged.

2. The welding device for the expansion joint of a road bridge according to claim 1, characterized in that A first spring (9) is fixedly arranged between the side of the telescopic block (6) facing the L-shaped plate (4) and the inner side wall of the telescopic sleeve (5). The telescopic block (6) is made of rubber material.

3. The welding device for expansion joints of road bridges according to claim 1, characterized in that, The bottom end of the pressing plate (3) is detachably installed on the inner plate (11). The inner plate (11) is movably arranged in the movable cabinet (12). The movable cabinet (12) is slidably arranged in the vertical groove (14). The vertical groove (14) is vertically opened on the top of the fixing plate (2). A second spring (13) is also fixedly arranged between the bottom of the inner plate (11) and the inner bottom wall of the movable cabinet (12).

4. The welding device for the expansion joint of a road bridge according to claim 3, characterized in that, A magnetic block (10) is fixedly arranged at the bottom end of the pressing plate (3), and the magnetic block (10) adsorbs on the inner plate (11).

5. The welding device for the expansion joint of a road bridge according to claim 3, characterized in that, The outer wall of the movable cabinet (12) is fixedly connected to a nut (16) through a connecting block (15). The inner wall of the nut (16) is threadedly connected to a lead screw (18). The lead screw (18) is rotatably arranged in the rotating cavity (17). The rotating cavity (17) is opened inside the fixing plate (2). A driving motor (19) is also fixedly arranged on the inner bottom wall of the rotating cavity (17). The lead screw (18) is fixedly installed on the top of the output shaft of the driving motor (19).

6. The welding device for expansion joints of road bridges according to claim 5, characterized in that, A worm gear (28) is also fixedly installed on the rotating shaft (7). The outer wall of the worm gear (28) is engaged with a worm (27). One end of the worm (27) is rotatably arranged on the inner side wall of the rod groove, and the other end of the worm (27) is fixedly connected to a horizontal shaft (26). A linkage mechanism is arranged between the lead screw (18) and the horizontal shaft (26). When the lead screw (18) rotates, the horizontal shaft (26) can be synchronously driven to rotate through the linkage mechanism.

7. The welding device for expansion joints of road bridges according to claim 6, wherein, The linkage mechanism includes a driving wheel (20), a synchronous belt (21), a driven wheel (22), a vertical shaft (23), a first bevel gear (24) and a second bevel gear (25). A driving wheel (20) is also fixedly installed on the lead screw (18). The outer wall of the driving wheel (20) is connected to a driven wheel (22) through a synchronous belt (21). The center of the driven wheel (22) is fixedly installed with a vertical shaft (23). The vertical shaft (23) is rotatably arranged in the shaft groove. The shaft groove is opened inside the fixing plate (2). A first bevel gear (24) is fixedly installed at the top end of the vertical shaft (23). A second bevel gear (25) is meshed with the outer wall of the first bevel gear (24), and the second bevel gear (25) is fixedly installed on the horizontal shaft (26).

8. A method of using a welding device for road and bridge expansion joints for using the above-mentioned welding device for road and bridge expansion joints, characterized in that, Comprising the following steps: S1. Place the end of the hollow expansion joint (1) on the fixed plate (2), and make the hollow part (102) of the hollow expansion joint (1) cover the top pressing plate (3) on the top of the fixed plate (2); S2. Control the driving motor (19) to operate. On the one hand, through transmission, make the top pressing plate (3) extend, and on the other hand, make the two L-shaped plates (4) rotate inwards; S3. The extended top pressing plate (3) presses against the inner top wall of the hollow part (102), and the two inwards-rotating L-shaped plates (4) respectively press against the two wing plate parts (101), thereby fixing the hollow expansion joint (1).

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