Steel box girder hoisting fine adjustment device

Abstract

The utility model discloses a steel box girder hoisting fine adjustment device which comprises a base, a jack is fixedly arranged on the upper surface of the base, a supporting assembly is fixedly arranged at the upper end of an ejector rod of the jack, supporting arms are arranged on the two adjacent side walls of the base respectively, the supporting arms are in an L shape, and air cylinders are fixedly arranged on the upper portions of long arms of the supporting arms. A piston rod of the air cylinder penetrates through the long arm of the supporting arm and extends to the position above the short arm of the supporting arm, and the piston rod is higher than the air cushion supporting assembly. According to the fine adjustment device for hoisting the steel box girder, the jack is arranged to adjust the height of the steel box girder, the air cushion supporting device, the supporting arm and the air cylinder are arranged to adjust the position of the steel box girder in the horizontal direction, so that the steel box girder is installed at a preset installation position, the installation precision is high, and the operation is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction equipment, and more specifically, to a steel box girder hoisting fine-tuning device. Background Art

[0002] In the process of bridge construction, steel box girders are used more and more widely, and more and more bridges are using steel box girder structures. Steel box girders are generally thin-walled boxes connected by full welding of top plates, bottom plates, webs, transverse diaphragms, longitudinal diaphragms and stiffening ribs. With the continuous increase in the span of urban bridges and traffic pressure, large-span and large-width steel box girders are increasingly used. As the width of the steel box girder increases, the weight of each steel box girder segment increases accordingly, and the lifting tonnage requirements for the crane are also getting higher and higher.

[0003] Chinese patent document CN 213505565 U discloses an efficient steel box girder hoisting mechanism, including a mounting plate and a steel box girder, the upper surface of the mounting plate is connected with a hoisting rope, the end of the hoisting rope away from the mounting plate is installed with a hoisting arm, the lower surface of the mounting plate is installed with a mounting rod, and the side of the mounting rod is installed with an upper clamping plate. In the existing steel box girder hoisting construction, due to the steel wire rope of the crane or the hoisting rope used in the hoisting equipment, although the crane can also adjust the position of the steel box girder during the hoisting process, due to the shaking of the hoisting rope or the steel wire rope, the crane cannot accurately place the steel box girder to the predetermined position.

[0004] Therefore, it is necessary to propose a steel box girder hoisting fine-tuning device to solve the problems existing in the prior art. Utility Model Content

[0005] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0006] In order to solve the above problems, the utility model provides a steel box girder lifting fine-tuning device, including a base, a jack is fixedly arranged on the upper surface of the base, a support assembly is fixedly arranged on the upper end of the jack's top rod, support arms are respectively arranged on two adjacent side walls of the base, the support arms are L-shaped, and cylinders are fixedly arranged on the upper parts of the long arms of the support arms, the piston rod of the cylinder penetrates the long arm of the support arm and extends to above the short arm of the support arm, and the height of the piston rod is higher than the height of the air cushion support assembly.

[0007] Preferably, the support component includes a support component body, spherical grooves are arranged in an array on the top surface of the support component body, steel balls are embedded in the spherical grooves, and the apex of the steel balls exceeds the top surface of the support component body.

[0008] Preferably, a cover plate is sealed on the top surface of the support assembly body, a spherical hole is provided on the cover plate at a position corresponding to the steel ball, and the shape of the spherical hole is adapted to the shape of the steel ball.

[0009] Preferably, a high-pressure oil hole is provided at the bottom of the spherical groove, the high-pressure oil hole extends downward to communicate with a high-pressure oil chamber provided in the support assembly body, an oil inlet hole is provided on the rear wall of the high-pressure oil chamber, the oil inlet hole penetrates the rear wall of the high support assembly body to form an oil inlet port, and the oil inlet port is communicated with an oil pump;

[0010] A horizontally arranged annular sealing groove is provided on the side wall of the spherical hole, and a sealing ring is arranged in the annular sealing groove.

[0011] Preferably, a suction cup is fixedly arranged at the end of the piston rod.

[0012] Preferably, four jacks are arranged in a rectangular array.

[0013] Preferably, two opposite edges on the bottom surface of the base are downwardly extended to form wing plates, threaded holes are provided on the wing plates, and bolts are threadedly connected in the threaded holes.

[0014] Preferably, at least three horizontal arrays of threaded holes are provided.

[0015] Preferably, the bolt is threadedly connected to a locking nut on the outer side of the wing plate.

[0016] Preferably, a protective layer is fixedly disposed on the end surface of the screw rod of the bolt.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] The steel box girder hoisting fine-tuning device described in the utility model is provided with a jack for adjusting the height of the steel box girder, and an air cushion support device, a support arm and a cylinder are provided to adjust the horizontal position of the steel box girder so that the steel box girder can be installed to a predetermined installation position, with high installation accuracy and convenient and quick operation.

[0019] The steel box girder hoisting fine-tuning device described in the present invention and other advantages, objectives and features of the present invention will be partially reflected through the following description, and will also be partially understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1It is a structural schematic diagram of the steel box girder hoisting fine-tuning device disclosed in the utility model;

[0022] Figure 2 It is a cross-sectional structural schematic diagram of the support assembly disclosed in the utility model;

[0023] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0024] Figure 4 It is a schematic structural diagram of a cross-section of the wing plate disclosed in the utility model. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0026] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0027] like Figure 1-3 As shown, a steel box girder hoisting fine-tuning device comprises a base 1, a jack 2 is fixedly arranged on the upper surface of the base 1, an air cushion support assembly 3 is fixedly arranged on the upper end of the top rod of the jack 2, support arms 4 are respectively arranged on two adjacent side walls of the base 1, the support arms 4 are L-shaped, and cylinders 5 are fixedly arranged on the upper parts of the long arms of the support arms 4, the piston rod of the cylinder 5 penetrates the long arm of the support arm 4 and extends to above the short arm of the support arm 4, and the height of the piston rod is higher than the height of the air cushion support assembly 3.

[0028] The support component 3 includes a support component body 6 , on the top surface of which spherical grooves 7 are arranged in an array, and steel balls 8 are embedded in the spherical grooves 7 , with the apex of the steel balls 8 exceeding the top surface of the support component body 6 .

[0029] A cover plate 9 is sealed on the top surface of the support assembly body 6 , and a spherical hole 10 is provided on the cover plate at a position corresponding to the steel ball. The shape of the spherical hole 10 is adapted to the shape of the steel ball 8 .

[0030] A high-pressure oil hole 15 is provided at the bottom of the spherical groove 7, and the high-pressure oil hole 15 extends downward to communicate with a high-pressure oil chamber 16 provided in the support assembly body 6. An oil inlet hole 17 is provided on the rear wall of the high-pressure oil chamber 16, and the oil inlet hole 17 penetrates the rear wall of the high support assembly body 6 to form an oil inlet port 18, and the oil inlet port 18 is communicated with the oil pump;

[0031] A horizontally arranged annular sealing groove 19 is provided on the side wall of the spherical hole 10 , and a sealing ring 20 is arranged in the annular sealing groove 19 .

[0032] The end of the piston rod is fixedly arranged.

[0033] Four jacks 2 are arranged in a rectangular array.

[0034] The working principle of the above technical solution is as follows: the steel box girder hoisting fine-tuning device is arranged on the bridge pier or the temporary bracket for installing the steel box girder. Before hoisting the steel box girder, the steel box girder hoisting fine-tuning device is installed to the position of the steel box girder preliminary installation position near one end of the steel box girder. The steel box girder is hoisted to the top of the steel box girder hoisting fine-tuning device by a crane and placed on the steel box girder hoisting fine-tuning device. The lower bottom surface of the steel box girder is placed on the supporting assembly 3 of the steel box girder hoisting fine-tuning device. The height of the steel box girder is set by the jack 2 so that the steel box girder stops at the elevation of the preliminary competition. Then the position of the steel box girder in the X-axis direction and the Y-axis direction can be adjusted. The steel box girder is placed on the steel box girder hoisting fine-tuning device. The bottom surface of the steel box girder contacts with the steel ball 8, and the steel ball 8 rolls in the spherical groove. The cylinder is started to adjust the position of the piston rods of the two cylinders to adjust the position of the steel box girder in the horizontal direction of the X-axis and the Y-axis, so that the steel box girder reaches the predetermined installation position. When the X-axis and Y-axis of the box beam are in position, the oil pump connected to the oil inlet 18 is started. The oil pump increases the pressure in the high-pressure oil chamber 16, so that the lubricating oil enters the spherical groove 7 from the high-pressure oil chamber through the high-pressure oil hole 15, and an oil film is formed between the spherical groove 7 and the steel ball 8, thereby reducing the friction between the steel ball and the spherical groove when rolling. When adjusting the position of the X-axis and Y-axis in the horizontal direction of the steel box beam, only a small force is required to move the steel box beam. Therefore, the purpose of moving the steel box beam can be achieved by using a suction cup. The suction cup can be a vacuum suction cup made of rubber material, or an electromagnetic suction cup. Then, the steel box beam is subsequently welded or cast. The vacuum suction cup or electromagnetic suction cup should be selected from the general models suitable for the steel box beam lifting fine-tuning device. The oil pump can also select the general models of oil pumps with power and external dimensions suitable for the steel box beam lifting fine-tuning device. A high-pressure oil pump can also be selected according to the weight of the steel box beam.

[0035] In order to prevent the steel balls from causing damage to the steel box girder during the support process when the steel box girder rotates on the support assembly, the number of arrays of different spherical grooves can be set according to the weight of the steel box girder. When the weight of the steel box girder increases, the number of spherical grooves and steel balls can be increased. The steel plate can also be pre-rotated on the support assembly before placing the steel box girder to protect the bottom surface of the steel box girder. When rotating the steel plate, the thickness of the steel plate should be considered when adjusting the elevation of the steel box girder.

[0036] Beneficial effects of the above technical solution:

[0037] The steel box girder hoisting fine-tuning device described in the utility model is provided with a jack for adjusting the height of the steel box girder, and a supporting device, a supporting arm and a cylinder are provided to adjust the horizontal position of the steel box girder so that the steel box girder can be installed to a predetermined installation position, with high installation accuracy and convenient and quick operation.

[0038] In one embodiment, Figure 4 As shown, two opposite edges on the bottom surface of the base 1 extend downward to form wing plates 11 , and threaded holes 12 are provided on the wing plates 11 , and bolts 13 are connected by threads in the threaded holes 12 .

[0039] At least three threaded holes 12 are arranged in a horizontal array.

[0040] The bolt 13 is threadedly connected to the locking nut 14 on the outer side of the wing plate 11

[0041] A protective layer is fixedly provided on the end surface of the screw rod of the bolt 13 .

[0042] The working principle of the above technical solution is: when the steel box girder hoisting fine-adjustment device is installed on the pier or temporary support, if it is only placed on the upper surface of the pier or temporary support, the steel box girder hoisting fine-adjustment device may be moved when the steel box girder is hoisted. Therefore, wing plates are set on the opposite edges of the lower end surface of the base 1. After the base is placed on the pier or temporary support, the wing plates are located on both sides of the pier or temporary support. At this time, loosen the locking nut 14 and rotate the bolt 13 so that the end of the screw rod of the bolt is against the side of the pier or temporary support, so that the base 1 is firmly connected to the pier or temporary support. A protective layer is fixedly set on the end surface of the screw rod of the bolt 13 to protect the pier and the temporary support to prevent damage to the pier and the temporary support, and then tighten the locking nut to the wing plate to prevent the bolt 13 from loosening.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A steel box girder hoisting fine-tuning device, characterized in that: The invention comprises a base (1), a jack (2) is fixedly arranged on the upper surface of the base (1), a support assembly (3) is fixedly arranged on the upper end of the top rod of the jack (2), support arms (4) are respectively arranged on two adjacent side walls of the base (1), the support arms (4) are L-shaped, a cylinder (5) is fixedly arranged on the upper part of the long arm of the support arm (4), a piston rod of the cylinder (5) penetrates the long arm of the support arm (4) and extends to the upper part of the short arm of the support arm (4), and the height of the piston rod is higher than the height of the air cushion support assembly (3).

2. The steel box girder hoisting fine-tuning device according to claim 1 is characterized in that: The support component (3) comprises a support component body (6), spherical grooves (7) are arranged in an array on the top surface of the support component body (6), steel balls (8) are embedded in the spherical grooves (7), and the apex of the steel balls (8) exceeds the top surface of the support component body (6).

3. The steel box girder hoisting fine-tuning device according to claim 2 is characterized in that: A cover plate (9) is sealed on the top surface of the support component body (6), and a spherical hole (10) is provided at a position corresponding to the steel ball on the cover plate, and the shape of the spherical hole (10) is adapted to the shape of the steel ball (8).

4. The steel box girder hoisting fine-tuning device according to claim 3 is characterized in that: A high-pressure oil hole (15) is provided at the bottom of the spherical groove (7), and the high-pressure oil hole (15) extends downward to communicate with a high-pressure oil chamber (16) provided in the support component body (6). An oil inlet hole (17) is provided on the rear wall of the high-pressure oil chamber (16), and the oil inlet hole (17) penetrates the rear wall of the high-support component body (6) to form an oil inlet port (18), and the oil inlet port (18) is communicated with an oil pump; A horizontally arranged annular sealing groove (19) is provided on the side wall of the spherical hole (10), and a sealing ring (20) is arranged in the annular sealing groove (19).

5. The steel box girder hoisting fine-tuning device according to claim 1 is characterized in that: A suction cup is fixedly arranged on the end of the piston rod.

6. The steel box girder hoisting fine-tuning device according to claim 1, characterized in that: Four jacks (2) are arranged in a rectangular array.

7. The steel box girder hoisting fine-tuning device according to claim 1, characterized in that: Two opposite edges on the bottom surface of the base (1) extend downward to form wing plates (11), threaded holes (12) are provided on the wing plates (11), and bolts (13) are connected by threads in the threaded holes (12).

8. The steel box girder hoisting fine-tuning device according to claim 7, characterized in that: At least three threaded holes (12) are arranged in a horizontal array.

9. The steel box girder hoisting fine-tuning device according to claim 8, characterized in that: The bolt (13) is threadedly connected to a locking nut (14) on the outer side of the wing plate (11).

10. The steel box girder hoisting fine-tuning device according to claim 9, characterized in that: A protective layer is fixedly arranged on the end surface of the screw rod of the bolt (13).

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