Cantilevered steel structure tower crane attachment device

Abstract

The utility model discloses a cantilever type steel structure tower crane attachment device, anchor on the structure floor, including the shaped column, the inclined support, the attachment lug plate seat and the connecting assembly, the shaped column is anchored on the structure floor through the connecting assembly, the inclined support interval setting is in the outer periphery of shaped column, and is anchored on the structure floor through the connecting assembly, the attachment lug plate seat is set up on the shaped column through the connecting assembly, the connecting assembly includes the connecting plate, the connecting backboard and the connecting bolt, the connecting plate sets up in the end of shaped column and inclined support attachment lug plate seat, the connecting backboard and the connecting plate correspond each other to set up, and are connected each other through the connecting bolt. The utility model provides a cantilever type steel structure tower crane attachment device, solves the problem that the traditional tower crane is restricted to the jacking operation because of depending on the concrete bearing structure attachment point.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and specifically relates to an attachment device for a cantilever steel structure tower crane. Background Technology

[0002] Electronic factories and large-scale complex buildings are characterized by large floor plan dimensions, large structural spans, high heights, complex structures, tight construction schedules, and frequent overlapping operations of multiple tower cranes. The layout of tower cranes must simultaneously meet the requirements of full structural coverage and coordination with surrounding production factors. The installation height is also constrained by the total building height, the safety distance between multiple towers, and the construction deployment. This often results in problems such as abnormal angles of the attachment rods or the lack of suitable structural attachment points in ideal positions, especially in areas with complex beams and columns and other unconventional structures.

[0003] Once a tower crane exceeds its independent height, it needs to be connected to the structure via an attachment frame to ensure safety. However, conventional methods relying on pre-embedded concrete components present the following problems: in complex structural areas, the limited selection of attachment points often results in a lack of reliable anchorage; the free height above the attachment point makes it difficult for the tower crane's lifting height to match construction needs or provides insufficient safety distance; and delays in attachment point construction will cause the tower crane's lifting to become disconnected from the main structure's progress. Existing technologies struggle to achieve flexible and adjustable safe attachment.

[0004] In multi-tower overlapping operations, a mismatch between the attachment and jacking sequence and the construction flow will directly hinder the construction of the main structure in the frontline area. Existing technologies cannot achieve safe and flexible attachment, and there is an urgent need for a solution that can adapt to unconventional structures, can be anchored at any position, and is conveniently adjustable. Summary of the Invention

[0005] The purpose of this utility model is to provide an attachment device for a cantilever steel structure tower crane, which solves the problem of limited lifting operations caused by the reliance on concrete load-bearing structure attachment points in traditional tower cranes.

[0006] To achieve the above objectives, this utility model is implemented through the following solution: An attachment device for a cantilever steel structure tower crane is anchored to a structural floor slab. A fixed column is anchored to the structural floor slab via a connecting assembly. Diagonal braces are spaced around the outer periphery of the fixed column and anchored to the structural floor slab via the connecting assembly. An attachment lug seat is mounted on the fixed column. The connecting assembly includes a connecting plate, a connecting back plate, and connecting bolts. The connecting plate is located at the ends of the fixed column and the attachment lug seat of the diagonal braces. The connecting back plate and the connecting plate are correspondingly arranged and connected to each other via connecting bolts.

[0007] Furthermore, the shaped column is a square column with internal ribs. The bottom end of the shaped column is fixedly connected to the connecting plate, and a stiffening plate is provided between the shaped column and the connecting plate.

[0008] Furthermore, the top end of the diagonal brace is fixedly connected to the side of the shaped column, and the bottom end of the diagonal brace is fixedly connected to the connecting plate.

[0009] Furthermore, the attachment ear plate seat includes an attachment ear plate and an ear plate connecting plate. The ear plate connecting plate is disposed on the rear side of the attachment ear plate by a connecting bolt. The attachment ear plate includes a base plate and ear plates. The ear plates are disposed in groups on the base plate. The ear plate connecting plate is connected to the base plate by a connecting bolt. A stiffening plate is disposed between the ear plate and the base plate. A reinforcing strip is disposed on the ear plate connecting plate.

[0010] Furthermore, the diagonal bracing is provided in three sets, with the three sets of diagonal bracing located on the three sides of the fixed column respectively.

[0011] Furthermore, there are two attachment ear plate seats, which are located on the same side of the shaping column and are arranged symmetrically from top to bottom.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a tower crane attachment device that is adaptable to unconventional structures, can be anchored at any position, and is conveniently adjustable. Through conveniently adjustable connecting components, combined with the triangular stable structure formed by the diagonal brace and the fixed column, the attachment ear plate seat can be vertically adjusted along the fixed column. This solves the problem of limited lifting operations caused by the reliance on concrete load-bearing structure attachment points in traditional tower cranes. It can be widely used in construction scenarios such as electronic factories, large complexes, and super high-rise buildings. It has the characteristics of simple structure, efficient installation and dismantling, non-destructive structure, and wide applicability. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of an attachment device for a cantilever steel structure tower crane according to this utility model. Figure 2 This is a side view of an attachment device for a cantilever steel structure tower crane according to this utility model; Figure 3 This is a schematic diagram of the attachment ear plate seat connection of the attachment device for a cantilever steel structure tower crane according to this utility model; Figure 4 This is a top view of an attachment device for a cantilever steel structure tower crane according to this utility model.

[0014] Reference numerals in the attached drawings: 1. Fixed column; 2. Diagonal brace; 3. Attached ear plate seat; 301. Attached ear plate; 3011. Seat plate; 3012. Ear plate; 302. Ear plate connecting plate; 4. Connecting plate; 5. Stiffening plate; 6. Connecting back plate; 7. Rib plate; 8. Connecting bolt; 9. Structural floor slab. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0017] Specific implementation examples are given below.

[0018] Please see Figures 1-4This utility model provides an attachment device for a cantilever steel structure tower crane, anchored to a structural floor slab 9. It includes a fixed column 1, diagonal braces 2, attachment lug seats 3, and a connecting assembly. The connecting assembly includes a connecting plate 4, a connecting back plate 6, and connecting bolts 8. The connecting bolts 8 are high-strength bolts. The fixed column 1 is anchored to the structural floor slab 9 via the connecting assembly. The fixed column 1 is a square column, welded from Q355B steel plate with a 600×600mm cross-section and a wall thickness of not less than 20mm. It has internal cross-shaped ribs 7, using a full penetration welding process to constrain the sidewall deformation of the fixed column 1 and improve the cross-sectional stress distribution, significantly enhancing the structural bending stiffness and overall stability. The structural floor slab 9 corresponding to the fixed column 1 is reinforced with... Additional reinforcing bars are provided. The bottom end of the fixed column 1 is welded to the connecting plate 4. The connecting back plate 6 corresponds to the connecting plate 4 and is connected and anchored to the structural floor slab 9 by connecting bolts 8, forming a double-plate shear-resistant structure. Friction pads are fitted on the connecting bolts 8. The friction pads are located at the contact positions between the structural floor slab 9 and the connecting plate 4 and the connecting back plate 6. The root of the fixed column 1 is a critical part of the cantilever load-bearing structure, which bears a large bending moment, shear force and local stress concentration. Eight stiffening plates 5 with a specification of 400mm×200mm are set around the root of the fixed column 1. The stiffening plates 5 are set perpendicular to the fixed column 1 and are fully penetrated welded, which can improve the node stiffness of the fixed column 1, improve the bending and torsional stiffness of the fixed column 1, and reduce the local stress of the wall panel of the fixed column 1.

[0019] The diagonal brace 2 and the attachment ear plate seat 3 are located on different sides of the fixed column 1. There are three sets of diagonal braces 2, which are located on the three sides of the fixed column 1 respectively, forming a triangular stable structure with the fixed column 1, which improves the anti-overturning performance of the attachment node of the tower crane. The top of the diagonal brace 2 is connected to the fixed column 1 by full penetration welding, and the bottom is welded to the connecting plate 4 by full penetration welding. Bolt holes are pre-machined on the connecting plate 4 and the connecting back plate 6. The connecting plate 4 and the connecting back plate 6 are anchored to the structural floor slab 9 by the connecting bolt 8. Friction pads are placed between the connecting plate 4 and the connecting back plate 6 and the structural floor slab 9 and are sleeved on the connecting bolt 8 to enhance the anti-slip capability of the anchoring end.

[0020] The attachment ear plate seat 3 includes an attachment ear plate 301 and an ear plate connecting plate 302. The ear plate connecting plate 302 is fixed to the shaping column 1 via a connecting bolt 8. The ear plate connecting plate 302 is located on the rear side of the attachment ear plate 301. The connecting bolt 8 is fastened to the outer periphery of the shaping column 1. The position of the attachment ear plate seat 3 on the shaping column 1 can be changed by adjusting the position of the connecting bolt 8. Friction pads are provided between the contact surfaces of the ear plate connecting plate 302, the attachment ear plate 301, and the shaping column 1 to facilitate friction. To enhance the anti-slip stiffness and fatigue durability of the joint, two attachment ear plate seats 3 are provided. The two attachment ear plate seats 3 are located on the same side of the shaping column 1 and are arranged symmetrically above and below. The attachment ear plate 301 includes a seat plate 3011 and an ear plate 3012. The ear plates 3012 are arranged in groups on the seat plate 3011. The ear plate connecting plate 302 is connected to the seat plate 3011 through a connecting bolt 8. A stiffening plate 5 is welded between the ear plate 3012 and the seat plate 3011. A reinforcing strip is welded on the ear plate connecting plate 302.

[0021] The fixed column 1, diagonal brace 2, attachment ear plate seat 3, connecting plate 4, and connecting back plate 6 are all made of Q355 grade low alloy high strength structural steel with a yield strength ≥355MPa, which can significantly improve the fatigue resistance and environmental adaptability of the device under alternating loads. A steel pipe support frame is set under the structural floor slab 9 in the anchorage area of ​​the fixed column 1 and diagonal brace 2. The longitudinal and transverse spacing of the support frame uprights is ≤600mm, the step distance is ≤1500mm, and the top is set with U-shaped support and steel main / secondary keel. The support range covers the anchorage area and extends 1.5m outward, transferring the load during the floor slab construction period to the lower structure and ensuring the local compressive stability of the concrete structure.

[0022] The construction method of this utility model is as follows: First, an anchorage zone is marked at the location where there are no pre-embedded parts in the structural floor slab 9, and an additional HRB400 steel mesh is added inside the floor slab. After the concrete strength of the floor slab reaches the design strength, the connecting plate 4 and the connecting back plate 6 clamp the floor slab, and 10.9 grade high-strength bolts are inserted to apply pre-tightening force. Friction washers are fitted on the high-strength bolts. Next, the top of the diagonal brace 2 is fully welded to the web of the fixed column 1, and the bottom end is connected to the structural floor slab 9 through the connecting plate 4. The connecting back plate 6 is attached to the lower surface of the structural floor slab 9, and high-strength bolts are inserted to lock the connecting plate 4 and the connecting back plate 6. Then, the ear plate connecting plate 302 on the fixed column 1 is moved to the design height, and high-strength bolts 8 are inserted to press the friction washers, so that the ear plate connecting plate 302 and the attached ear plate 301 clamp the side wall of the fixed column 1. Finally, the tower crane wall-mounted rod and the attached ear plate seat 3 are connected by a pin.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An attachment device for a cantilever steel structure tower crane, anchored to a structural floor slab (9), characterized in that: It includes a fixed column (1), a diagonal brace (2), an attachment ear plate seat (3), and a connecting assembly. The fixed column (1) is anchored to the structural floor slab (9) through the connecting assembly. The diagonal brace (2) is spaced around the outer periphery of the fixed column (1) and is anchored to the structural floor slab (9) through the connecting assembly. The attachment ear plate seat (3) is set on the fixed column (1). The connecting assembly includes a connecting plate (4), a connecting back plate (6), and a connecting bolt (8). The connecting plate (4) is located at the end of the fixed column (1) and the attached ear plate seat (3) of the diagonal brace (2). The connecting back plate (6) is arranged correspondingly to the connecting plate (4) and is connected to each other by the connecting bolt (8).

2. The attachment device for a cantilever steel structure tower crane according to claim 1, characterized in that: The fixed column (1) is a square column with ribs (7) inside. The bottom end of the fixed column (1) is fixedly connected to the connecting plate (4). A stiffening plate (5) is provided between the fixed column (1) and the connecting plate (4).

3. The attachment device for a cantilever steel structure tower crane according to claim 1, characterized in that: The top end of the diagonal brace (2) is fixedly connected to the side of the shaped column (1), and the bottom end of the diagonal brace (2) is fixedly connected to the connecting plate (4).

4. The attachment device for a cantilever steel structure tower crane according to claim 1, characterized in that: The attachment ear plate seat (3) includes an attachment ear plate (301) and an ear plate connecting plate (302). The ear plate connecting plate (302) is disposed on the rear side of the attachment ear plate (301) by a connecting bolt (8). The attachment ear plate (301) includes a seat plate (3011) and an ear plate (3012). The ear plates (3012) are disposed in groups on the seat plate (3011). The ear plate connecting plate (302) is connected to the seat plate (3011) by a connecting bolt (8). A stiffening plate (5) is disposed between the ear plate (3012) and the seat plate (3011). A reinforcing strip is disposed on the ear plate connecting plate (302).

5. The attachment device for a cantilever steel structure tower crane according to claim 1, characterized in that: The diagonal brace (2) is provided in three sets, and the three sets of diagonal braces (2) are located on the three sides of the fixed column (1).

6. The attachment device for a cantilever steel structure tower crane according to claim 1, characterized in that: There are two attachment ear plate seats (3), which are located on the same side of the shaping column (1) and are arranged symmetrically above and below.

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