Lifting appliance for steel bridge box type suspender

Abstract

A lifting appliance for a steel bridge box type lifting rod comprises a top beam, a bottom beam, two side beams and pin shafts, and limiting protrusions are arranged in the middles of the inner sides of the top beam, the bottom beam and the two side beams; first connecting holes are formed in the two ends of the top beam, second connecting holes and third connecting holes are formed in the two ends of the bottom beam, fourth connecting holes are formed in the upper ends and the lower ends of the side beams, fifth connecting holes are further formed in the upper ends of the side beams, and pin shafts penetrate through the first connecting holes and the two fourth connecting holes to connect the two ends of the top beam with the upper ends of the two side beams together; pin shafts penetrate through the second connecting holes and the two fourth connecting holes to connect the two ends of the bottom beam and the lower ends of the two side beams together, so that the top beam, the bottom beam and the two side beams define a frame type structure. The limiting protrusions are arranged on the inner side of the frame type structure, the lifting appliance abuts against the top plate, the side plate and the bottom plate of the box type lifting rod through the limiting protrusions in the lifting and turning-over process, the lifting appliance does not make contact with the flow guide plate, and therefore the hidden danger that the box type lifting rod collides and extrudes the flow guide plate in the lifting, turning-over and loading processes is avoided.

Description

Technical Field

[0001] This utility model relates to the field of steel bridge manufacturing technology, and in particular to a lifting device for box-type hangers of steel bridges. Background Technology

[0002] The steel bridge box girder hanger consists of a top plate, web plate, bottom plate, guide plate, connecting plate, etc. Figure 5 As shown in the diagram, the deflector plate is relatively thin, typically 6mm thick, and has a hollow structure, making it unable to bear loads. During the lifting, turning, and loading of the boom, the deflector plate will inevitably be subjected to collisions and compression, which can severely damage it and cause significant difficulties in the lifting, turning, and loading of the box-type boom. Existing lifting equipment cannot overcome these problems. Utility Model Content

[0003] In order to solve the above-mentioned problems in the prior art, the present invention provides a lifting device for box-type hangers of steel bridges.

[0004] This utility model is achieved through the following technical solution:

[0005] A lifting device for a box-type suspender of a steel bridge includes a top beam, a bottom beam, two side beams, and a pin. Limiting protrusions are provided at the middle of the inner sides of the top beam, bottom beam, and two side beams. The top beam has first connecting holes at both ends, the bottom beam has second and third connecting holes at both ends, with the third connecting hole located outside the second connecting hole. The side beams have fourth connecting holes at both the upper and lower ends, and the upper end of the side beam also has a fifth connecting hole, located outside the fourth connecting hole. The pin passes through the first connecting holes at both ends of the top beam and the fourth connecting holes at the upper ends of the two side beams, connecting the two ends of the top beam to the upper ends of the two side beams. The pin passes through the second connecting holes at both ends of the bottom beam and the fourth connecting holes at the lower ends of the two side beams, connecting the two ends of the bottom beam to the lower ends of the two side beams, thus forming a frame structure with the top beam, bottom beam, and two side beams.

[0006] Furthermore, a first lead screw is installed at the middle position of the top beam perpendicular to the direction of the top beam, and a second lead screw is installed at the middle position of one of the side beams perpendicular to the direction of the side beam.

[0007] Furthermore, two of each of the first and second lead screws are installed side by side.

[0008] Furthermore, both the first lead screw and the second lead screw are installed via nuts located on the sides of the top beam and side beam, respectively.

[0009] Furthermore, the inner end face of the limiting protrusion is a plane.

[0010] The beneficial effects of this utility model are:

[0011] 1. This utility model provides a limiting protrusion on the inner side of the frame structure. During the hoisting and turning process, the limiting protrusion abuts against the top plate, side plate, and bottom plate of the box-type hoist, preventing it from contacting the guide plate. This avoids the potential danger of the box-type hoist colliding with and squeezing the guide plate during hoisting, turning, and loading.

[0012] 2. By setting a lead screw, this utility model can adjust the internal space of the frame structure according to the size of different box-type hangers, so as to meet the use of box-type hangers with different cross-sectional dimensions.

[0013] 3. This utility model is simple to assemble, easy to disassemble, and has good practicality. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the top beam structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the bottom beam structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the side beam structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the cross-sectional structure of a box-type hanger;

[0019] Figure 6 This is a diagram showing the usage status of the flat-type box-shaped suspension rod of this utility model;

[0020] Figure 7 This is a diagram showing the usage state of the flip-box type lifting rod of this utility model.

[0021] Reference numerals in the attached drawings: Top beam 1, first connecting hole 1-1, first lead screw 1-2, bottom beam 2, second connecting hole 2-1, third connecting hole 2-2, side beam 3, fourth connecting hole 3-1, fifth connecting hole 3-2, second lead screw 3-3, pin shaft 4, limiting protrusion 5, nut 6, box-type lifting rod 7, top plate 7-1, guide plate 7-2, web plate 7-3, bottom plate 7-4, lifting rope 8. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-7 The present invention will be described in detail with reference to specific embodiments.

[0023] refer to Figure 1-4A lifting device for a box-type suspender of a steel bridge includes a top beam 1, a bottom beam 2, two side beams 3, and a pin 4. Limiting protrusions 5 are provided at the middle of the inner sides of the top beam 1, bottom beam 2, and two side beams 3. The top beam 1 has first connecting holes 1-1 at both ends. The bottom beam 2 has second connecting holes 2-1 and third connecting holes 2-2 at both ends, with the third connecting hole 2-2 located outside the second connecting hole 2-1. The side beams 3 have fourth connecting holes 3-1 at both the upper and lower ends. The upper end of the side beam 3 also has a... The fifth connecting hole 3-2 is located outside the fourth connecting hole 3-1; the pin 4 passes through the first connecting hole 1-1 at both ends of the top beam 1 and the fourth connecting hole 3-1 at the upper end of the two side beams 3 to connect the two ends of the top beam 1 to the upper end of the two side beams 3; the pin 4 passes through the second connecting hole 2-1 at both ends of the bottom beam 2 and the fourth connecting hole 3-1 at the lower end of the two side beams 3 to connect the two ends of the bottom beam 2 to the lower end of the two side beams 3, so that the top beam 1, the bottom beam 2, and the two side beams 3 form a frame structure.

[0024] The inner end face of the limiting protrusion 5 is a plane to increase the contact area between the lifting device and the box-type lifting rod, thereby ensuring the stability of the lifting.

[0025] To accommodate box-type hangers with different cross-sectional dimensions, a first lead screw 1-2 is installed perpendicularly to the middle of the top beam 1, and a second lead screw 3-3 is installed perpendicularly to the middle of the side beam 3 on the right side. The internal space of the frame structure can be adjusted using the first lead screw 1-2 and the second lead screw 3-3 to accommodate box-type hangers with different cross-sectional dimensions, depending on their size.

[0026] Furthermore, to ensure reliable fixation of the first lead screw 1-2 and the second lead screw 3-3 to the box-type lifting rod, two of each are installed side by side. Both the first lead screw 1-2 and the second lead screw 3-3 are installed using nuts 6 fixed to the sides of the top beam 1 and the side beam 3.

[0027] During the use of this utility model, two of these lifting tools must be used simultaneously to complete the lifting operation.

[0028] Flat-mounted box-type hanger, for reference Figure 6When the cross-sectional dimensions of the box-type lifting rod 7 are compatible with the frame structure of the lifting device, two lifting devices are respectively fitted onto the ends of the box-type lifting rod 7, and the limiting protrusions 5 on the top beam 1, bottom beam 2, and two side beams 3 are respectively abutted against the top plate 7-1, bottom plate 7-4, and two side web plates 7-3 of the box-type lifting rod 7. Then, the four lifting ropes 8 are respectively connected to the fifth connecting hole 3-2, and the box-type lifting rod 7 can be lifted horizontally. When the cross-sectional dimensions of the box-type lifting rod 7 are smaller than the frame structure of the lifting device, the top plate 7-1 can be tightened by rotating the first lead screw 1-2, and the right side web plate 7-3 can be tightened by rotating the second lead screw 3-3.

[0029] Flip-top box-type boom, for reference Figure 7 The installation and fixing of the lifting device is the same as that of the flat-lift box-type lifting rod. The difference is that the two lifting ropes 8 are connected to the two fifth connecting holes 3-2 on one side respectively, and the other two lifting ropes 8 are connected to the two third connecting holes 2-2 on the other side respectively. By lowering the two lifting ropes 8 connected to the two fifth connecting holes 3-2 and raising the other two lifting ropes 8 connected to the two third connecting holes 2-2, the box-type lifting rod 7 can be rotated counterclockwise.

[0030] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A lifting device for a box-type suspension rod of a steel bridge, characterized in that: The structure includes a top beam (1), a bottom beam (2), two side beams (3), and a pin (4). Limiting protrusions (5) are provided at the middle inner sides of the top beam (1), bottom beam (2), and two side beams (3). The top beam (1) has a first connecting hole (1-1) at both ends. The bottom beam (2) has a second connecting hole (2-1) and a third connecting hole (2-2) at both ends, with the third connecting hole (2-2) located outside the second connecting hole (2-1). The side beams (3) have a fourth connecting hole (3-1) at both the upper and lower ends, and a fifth connecting hole (3-2) at the upper end of the side beam (3). The fifth connecting hole (3-2) is located outside the fourth connecting hole (3-1); the pin (4) passes through the first connecting hole (1-1) at both ends of the top beam (1) and the fourth connecting hole (3-1) at the upper end of the two side beams (3) to connect the two ends of the top beam (1) with the upper end of the two side beams (3); the pin (4) passes through the second connecting hole (2-1) at both ends of the bottom beam (2) and the fourth connecting hole (3-1) at the lower end of the two side beams (3) to connect the two ends of the bottom beam (2) with the lower end of the two side beams (3), so that the top beam (1), the bottom beam (2), and the two side beams (3) form a frame structure.

2. The lifting device for box-type suspenders of steel bridges according to claim 1, characterized in that: The top beam (1) is equipped with a first lead screw (1-2) at the middle position perpendicular to the direction of the top beam (1), and one of the side beams (3) is equipped with a second lead screw (3-3) at the middle position perpendicular to the direction of the side beam (3).

3. The lifting device for box-type suspenders of steel bridges according to claim 2, characterized in that: The first lead screw (1-2) and the second lead screw (3-3) are each installed in pairs side by side.

4. The lifting device for box-type suspenders of steel bridges according to claim 3, characterized in that: The first lead screw (1-2) and the second lead screw (3-3) are both installed by lead nuts (6) set on the sides of the top beam (1) and the side beam (3).

5. The lifting device for box-type suspenders of steel bridges according to claim 3, characterized in that: The inner end face of the limiting protrusion (5) is a plane.

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