Positioning and fixing device for welding U-shaped rib of steel box girder

Abstract

The utility model discloses a positioning and fixing device for welding and processing a U-shaped rib of a steel box girder, which belongs to the technical field of steel box girder processing and comprises a support frame, a plurality of threaded rods are rotatably connected to an inner cavity of the support frame, and a plurality of first motors are fixedly mounted on the outer side of the support frame. According to the U-shaped rib welding device, the positions of the movable frame and the movable box are adjusted through threaded fit between the threaded rod and the first motor, and meanwhile the electric push rod is used for driving the movable box and the positioning plate to move downwards, so that the movable box is located above the top face, to be welded, of the U-shaped rib to be welded, of the steel box girder body; and the distance between the two positioning plates is adjusted through threaded fit between the two-way lead screw and the movable seat, so that the distance between the two positioning plates is equal to the width of the U-shaped rib, the U-shaped rib is conveniently inserted into inner cavities of the two positioning plates, the welding position of the U-shaped rib is positioned and fixed through the positioning plates, and the practicability of the U-shaped rib welding device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel box girder processing technical field more specifically, relate to a kind of positioning and fixing device for steel box girder U type rib welding processing. BACKGROUND

[0002] Steel box girder is also called steel plate box girder, and is a common structural form of long-span bridge. It is usually used in large-span bridges and is called steel box girder because of its box-like appearance. The steel box girder is generally connected by top plate, bottom plate, web, transverse diaphragm, longitudinal diaphragm and stiffening rib through full welding. The stiffening rib is usually U-shaped, which is composed of a straight section and two curved sections. This shape allows the rib to effectively withstand bending and shear loads. In the curved section, the stress distribution of the rib is uneven, but in the straight section, the stress distribution of the rib is relatively uniform. When welding the U-shaped rib to the main body of the steel box girder, it needs to be positioned to ensure the accuracy of the welding position. Therefore, we propose a positioning and fixing device for steel box girder U-shaped rib welding processing. SUMMARY

[0003] In view of the problems mentioned in the above background technology, the purpose of the utility model is to provide a positioning and fixing device for steel box girder U-shaped rib welding processing.

[0004] To solve the above problems, the utility model adopts the following technical scheme:

[0005] A positioning and fixing device for steel box girder U-shaped rib welding processing, comprising a support frame, a plurality of threaded rods are rotatably connected in the inner cavity of the support frame, a plurality of first motors are fixedly installed on the outer side of the support frame, the output shafts of the plurality of first motors are respectively connected to the ends of the plurality of threaded rods, a plurality of moving frames are threadedly sleeved on the outer sides of the plurality of threaded rods, a plurality of electric push rods are fixedly installed on the plurality of moving frames, the output ends of the plurality of electric push rods are extended to the bottom of the moving frame and are fixedly connected with a moving box, a bidirectional screw rod is rotatably connected in the inner cavity of the moving box, a moving seat is threadedly sleeved on the outer sides of both ends of the bidirectional screw rod, a positioning plate is fixedly connected to the bottom surface of the moving seat, a second motor is fixedly installed on the end of the moving box, and the output shaft of the second motor is connected to the end of the bidirectional screw rod.

[0006] As a preferred embodiment of the utility model, a perspective board is fixedly sleeved on the end face of the support frame, and a scale is provided on the outer side of the perspective board.

[0007] As a preferred embodiment of the utility model, a plurality of support legs are fixedly connected to the bottom surface of the support frame, and a self-locking caster is fixedly installed at the bottom end of each support leg.

[0008] As a preferred scheme of the utility model, the inner wall of the moving box and the side of the moving seat are attached.

[0009] As a preferred scheme of the utility model, the inner cavity of the support frame is fixedly sleeved with a plurality of slide rods, and the slide rods and the moving frame are movably sleeved.

[0010] As a preferred scheme of the utility model, the outer side of one of the supporting legs is fixedly installed with a control panel, and the control panel is electrically connected with the first motor, the electric push rod and the second motor respectively.

[0011] The utility model has the advantages of:

[0012] In the utility model, the position of the moving frame and the moving box is adjusted by the thread cooperation between the threaded rod and the first motor, the moving box and the positioning plate are driven downward by the electric push rod, the moving box is located above the U-shaped rib to be welded on the top surface of the steel box girder main body, the distance between the two positioning plates is adjusted by the thread cooperation between the bidirectional screw rod and the moving seat, the distance between the two positioning plates is equal to the width of the U-shaped rib, the U-shaped rib is inserted into the inner cavities of the two positioning plates, the position of the U-shaped rib is positioned and fixed by the positioning plate, and the practicability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the whole structure schematic view of the utility model;

[0014] Figure 2 It is the structure schematic view of the support frame of the utility model;

[0015] Figure 3 It is the structure schematic view of the moving frame of the utility model;

[0016] Figure 4 It is the section view schematic view of the moving box of the utility model.

[0017] Mark explanation in drawing:

[0018] 1, support frame, 2, threaded rod, 3, moving frame, 4, first motor, 5, electric push rod, 6, moving box, 7, bidirectional screw rod, 8, moving seat, 9, positioning plate, 10, second motor, 11, supporting leg, 12, self-locking trolley, 13, perspective board, 14, scale, 15, slide rod, 16, control panel. DETAILED DESCRIPTION

[0019] 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 of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort fall within the protection scope of the present application.

[0020] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements indicated or implied to have a specific orientation, structure and operation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood in a broad sense, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected, can be mechanically connected, or can be electrically connected, can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] Embodiment:

[0023] Please refer to Figures 1-4 A positioning and fixing device for steel box girder U-shaped rib welding processing, comprising a supporting frame 1, a plurality of threaded rods 2 are rotatably connected in the cavity of the supporting frame 1, a plurality of first motors 4 are fixedly installed on the outer side of the supporting frame 1, the output shafts of the plurality of first motors 4 are respectively connected with the end portions of the plurality of threaded rods 2, a plurality of moving frames 3 are respectively threadedly sleeved on the outer sides of the plurality of threaded rods 2, a plurality of electric push rods 5 are respectively fixedly installed on the plurality of moving frames 3, the output ends of the plurality of electric push rods 5 all extend to the bottom of the moving frame 3 and are fixedly connected with a moving box 6, a bidirectional screw rod 7 is rotatably connected in the cavity of the moving box 6, moving seats 8 are respectively threadedly sleeved on the outer sides of the two ends of the bidirectional screw rod 7, positioning plates 9 are respectively fixedly connected to the bottom surfaces of the moving seats 8, second motors 10 are fixedly installed at the ends of the moving box 6, and the output shafts of the second motors 10 are connected with the end portions of the bidirectional screw rod 7.

[0024] In the embodiment, the electric push rod 5, the moving box 6 and the like structures on each moving frame 3 are staggered with each other, and the plurality of moving frames 3 are located at different heights, so that the plurality of moving frames 3 can smoothly move on the plurality of threaded rods 2.

[0025] Specifically, please refer to Figure 1 The end surface of the support frame 1 is fixedly sleeved with a perspective plate 13, and the outer side surface of the perspective plate 13 is provided with a scale 14.

[0026] In this embodiment, the position of the moving frame 3 is controlled through the cooperation of the perspective plate 13 and the scale 14, so as to ensure the accuracy of the positioning of the positioning plate 9 at the lower part of the moving frame 3 to the U-shaped rib.

[0027] Specifically, please refer to Figure 1 The bottom surface of the support frame 1 is fixedly connected with a plurality of support legs 11, and the bottom ends of the plurality of support legs 11 are respectively fixedly installed with self-locking casters 12.

[0028] In this embodiment, the support frame 1 is supported by the support legs 11 and the self-locking casters 12, and the device is moved by the self-locking casters 12.

[0029] Specifically, please refer to Figure 4 The inner wall of the moving box 6 and the side surface of the moving seat 8 are in close contact.

[0030] In this embodiment, the moving seat 8 is limited by the inner wall of the moving box 6, so that the moving seat 8 can only move along the axial direction of the bidirectional screw rod 7.

[0031] Specifically, please refer to Figure 1 The inner cavity of the support frame 1 is fixedly sleeved with a plurality of sliding rods 15, and the sliding rods 15 and the moving frame 3 are movably sleeved.

[0032] In this embodiment, the moving frame 3 is limited by the movable sleeving between the sliding rods 15 and the moving frame 3, so that the moving frame 3 can only move along the axial direction of the threaded rod 2, and in addition, the support strength of the moving frame 3 is ensured through the cooperation of the sliding rods 15 and the moving frame 3.

[0033] Specifically, please refer to Figure 2 and Figure 3 The outer side of one of the support legs 11 is fixedly installed with a control panel 16, and the control panel 16 is electrically connected with the first motor 4, the electric push rod 5 and the second motor 10 respectively.

[0034] In this embodiment, the first motor 4, the electric push rod 5 and the second motor 10 are controlled by the control panel 16.

[0035] Working principle: When in use, first use the self-locking casters 12 to move the device to the top of the steel box beam body, and at the same time start the electric push rod 5 to drive the moving box 6 and the positioning plate 9 to move down, so that the bottom surface of the positioning plate 9 contacts the top surface of the steel box beam body, and then start the second motor 10 to drive the bidirectional screw rod 7 to rotate, and the two positioning plates 9 are driven to move by the threaded fit between the bidirectional screw rod 7 and the moving seat 8, so that the distance between the two positioning plates 9 is equal to the width of the U-shaped rib, and then start multiple first motors 4 respectively to drive multiple threaded rods 2 to rotate, and through multiple The threaded cooperation between the threaded rod 2 and multiple mobile frames 3 drives the mobile frame 3 and the positioning plates 9 below the mobile frame 3 to move, so that multiple groups of positioning plates 9 are moved to the position where the U-shaped ribs are welded on the steel box girder body. Finally, the U-shaped ribs are inserted from the inner sides of the two opposite positioning plates 9, and the U-shaped ribs are placed on the top surface of the steel box girder body, so that the positioning plates 9 are used to position and fix the U-shaped ribs to be welded on the steel box girder body, and then the U-shaped ribs placed on the steel box girder body are spot-welded and positioned first, so that the U-shaped ribs can be welded to the steel box girder body using an automatic welding machine later.

[0036] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and improved ideas of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A positioning and fixing device for welding U-shaped ribs of a steel box beam, comprising a support frame (1), characterized in that: The inner cavity of the support frame (1) is rotatably connected to a plurality of threaded rods (2), and the outer side of the support frame (1) is fixedly installed with a plurality of first motors (4), and the output shafts of the plurality of first motors (4) are respectively connected to the ends of the plurality of threaded rods (2). The outer sides of the plurality of threaded rods (2) are respectively threadedly sleeved with a moving frame (3), and the plurality of moving frames (3) are respectively fixedly installed with electric push rods (5). The output ends of the plurality of electric push rods (5) extend to the bottom of the moving frame (3) and are fixedly connected to a moving box (6). The inner cavity of the moving box (6) is rotatably connected to a bidirectional screw rod (7), and the outer sides of both ends of the bidirectional screw rod (7) are respectively threadedly sleeved with a moving seat (8), and the bottom surface of the moving seat (8) is respectively fixedly connected with a positioning plate (9). The ends of the moving box (6) are fixedly installed with a second motor (10), and the output shaft of the second motor (10) is connected to the end of the bidirectional screw rod (7).

2. A positioning and fixing device for welding U-shaped ribs of a steel box beam according to claim 1, characterized in that: A perspective plate (13) is fixedly sleeved on the end surface of the support frame (1), and a scale (14) is provided on the outer side surface of the perspective plate (13).

3. The positioning and fixing device for welding U-shaped ribs of a steel box beam according to claim 1, characterized in that: A plurality of support legs (11) are fixedly connected to the bottom surface of the support frame (1), and self-locking casters (12) are respectively fixedly mounted on the bottom ends of the plurality of support legs (11).

4. The positioning and fixing device for welding U-shaped ribs of a steel box beam according to claim 1, characterized in that: The inner wall of the movable box (6) and the side surface of the movable seat (8) are in contact with each other.

5. The positioning and fixing device for welding U-shaped ribs of a steel box beam according to claim 1, characterized in that: A plurality of sliding rods (15) are fixedly sleeved in the inner cavity of the support frame (1), and the sliding rods (15) and the movable frame (3) are movably sleeved.

6. The positioning and fixing device for welding U-shaped ribs of a steel box beam according to claim 3, characterized in that: A control panel (16) is fixedly mounted on the outer side of one of the support legs (11), and the control panel (16) is electrically connected to the first motor (4), the electric push rod (5), and the second motor (10) respectively.

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