CN212198259U - Tower Crane Attachment Device - Google Patents

Description

Tower Crane Attachment Device

technical field

The utility model relates to a tower crane attachment device.

Background technique

Tower cranes are the most commonly used lifting equipment on construction sites, and are used to hoist construction materials such as steel bars, corrugated wood, concrete, and steel pipes. In the prior art, the tower crane is fixed to the main body through multiple sets of tower crane attachment devices. The attachment frame of each group of tower crane attachment devices cooperates with three tie rods to achieve connection and fixation with the main building. One end of the tie rod is fixed with the attachment frame by bolts, and the other end of the tie rod is connected and fixed with the main building through the embedded bolts, but the existing number of tie rods is three, and the stability of the tower crane is lacking. After the construction is completed, it will cause quality problems such as water leakage in the pre-embedded location.

Utility model content

The technical problem to be solved by the utility model is to provide a tower crane attachment device with stable structure and flexible disassembly.

In order to solve the above technical problems, the utility model provides a tower crane attachment device, comprising a standard section attachment frame, and the standard section attachment frame is fixed between two standard section arms of the tower crane;

Including four connecting rods and two sets of hoop assemblies;

The two sets of hoop assemblies are respectively matched with the two concrete columns on the side of the main building close to the tower crane section arm. The two holding plates are connected and fixed by several fixing bolts, and the horizontal heights of the two groups of holding hoop components are the same;

The four connecting rods are the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod respectively. The first connecting rod and the second connecting rod correspond to a set of hoop assemblies, and the third connecting rod and the fourth connecting rod The connecting rod corresponds to another group of hoop assemblies, one end of the first connecting rod is fixedly connected to the near-angle position of the standard section attachment frame close to the side of the main building, the other end of the first connecting rod is fixedly connected to the corresponding hoop assembly, and the second connecting rod is fixedly connected to the corresponding hoop assembly. One end of the rod is fixedly connected to the far corner of the standard section attachment frame close to the main building, the other end of the second link is fixedly connected to the corresponding hoop assembly, and one end of the third link is fixed to the near angle of the side wall of the standard section attachment frame. The position is fixedly connected, the other end of the third connecting rod is fixedly connected with the corresponding hoop assembly, one end of the fourth connecting rod is fixedly connected with the far-angle position of the side wall of the standard section attachment frame, and the other end of the fourth connecting rod is fixedly connected with the corresponding holding hoop. The hoop assembly is fixedly connected.

After adopting such a structure, two sets of hoop assemblies cooperate with the concrete columns of the main building to realize the connection and fixation between the tower crane and the main building. After the subsequent main building is completed, the tower crane and the main body can be removed by removing the hoop assemblies. The connection between buildings will not cause damage to the surface of the main building and avoid subsequent water leakage problems;

In addition, the fixed structure of the four connecting rods and the distribution positions of each other strengthen the stability of the connection between the attachment frame and the main building, which can improve the safety of fixing the tower crane to the main building more than the existing three connecting rod connection structure.

In order to understand the technical content of the present invention more clearly, the tower crane attachment device is hereinafter referred to as the attachment device.

The four connecting rods of the attachment device have the same structure. The connecting rods include a first lug plate, a first threaded sleeve, a second threaded sleeve, a second lug plate and a double-ended screw. The first lug plate is fixedly connected to the first lug plate. On a threaded sleeve, the second lug plate is fixedly connected to the second threaded sleeve, and the first threaded sleeve and the second threaded sleeve are respectively matched with the double-ended screw; after adopting this structure, the extension of the double-ended screw can be adjusted. The length of the first threaded sleeve or the second threaded sleeve can be adjusted to achieve the purpose of flexibly fine-tuning the length of the connecting rod and facilitate the assembly operation of the attachment device.

The angle between the first link of the attachment device and the side of the main building near the side of the tower crane section arm is 82-86°; the distance between the second link and the side of the main building on the side of the tower crane section arm is 60-65°; The distance between the third link and the side of the main building near the arm of the tower crane is 40 to 45°; the distance between the fourth link and the side of the main building near the arm of the tower crane is 52 to 56°; adopt such a structure After that, the arrangement position and angle parameters of the four connecting rods are more specific, which further improves the stability of the attachment device.

Description of drawings

Figure 1 is a top view of an embodiment of the attachment device.

FIG. 2 is a schematic structural diagram of a connecting rod according to an embodiment of the attachment device.

FIG. 3 is an enlarged view of part A of FIG. 1 .

Detailed ways

As shown in Figures 1 to 3

The attachment device includes a standard section attachment frame 1, four connecting rods and two sets of hoop assemblies.

The standard section attachment frame 1 adopts a commercially available standard section attachment frame 1, and the standard section attachment frame 1 is fixed between two standard section arms of the tower crane.

The two groups of hoop assemblies are respectively the first hoop assembly 2 and the second hoop assembly 3. The structures of the first hoop assembly 2 and the second hoop assembly 3 are the same. Taking the first hoop assembly 2 as an example, the The structure of the hoop assembly, the first hoop assembly 2 comprises two holding plates 21 and six fixing bolts 22, the two holding plates 21 are respectively close to both sides of the concrete column 8 of the main building, and the The fixing bolts 22 are connected and fixed, and a third lug 23 is welded on one of the holding plates 21;

The first hoop assembly 2 and the second hoop assembly 3 cooperate with the two concrete columns 8 on the side of the main building close to the tower crane section arm, respectively. The first hoop assembly 2 and the second hoop assembly 3 are arranged left and right The horizontal heights of the hoop assembly 2 and the second hoop assembly 3 are the same.

The four connecting rods have the same structure. The four connecting rods are the first connecting rod 4, the second connecting rod 5, the third connecting rod 6 and the fourth connecting rod 7 respectively. Taking the first connecting rod 4 as an example, the first connecting rod 4. It includes a first lug plate 41, a first threaded sleeve 42, a second threaded sleeve 43, a second lug plate 44 and a double-ended screw 45. The first threaded sleeve 42 and the second threaded sleeve 43 are of square tube structure , the inner hole walls of the first threaded sleeve 42 and the second threaded sleeve 43 are provided with threads, the first lug plate 41 is welded on the first threaded sleeve 42, and the second lug plate 44 is welded on the second threaded sleeve 43. , the first threaded sleeve 42 and the second threaded sleeve 43 are respectively matched with the double-ended screw 45 .

The first connecting rod 4 and the second connecting rod 5 correspond to the first hoop assembly 2, the third connecting rod 6 and the fourth connecting rod 7 correspond to the second hoop assembly 3, and one end of the first connecting rod 4 is close to the main building. The lug plate at the near-angle position of the standard section attachment frame 1 on one side is fixed by bolts, the other end of the first connecting rod 4 and the third lug plate 23 of the first hoop assembly 2 are fixed by bolts, and one end of the second connecting rod 5 is connected with the adjacent main building. The lug plate at the far corner of the standard joint attachment frame 1 on one side is fixed by bolts, the other end of the second connecting rod 5 is fixed with the third lug plate 23 of the first hoop assembly 2 by bolts, and one end of the third connecting rod 6 is fixed with the standard joint. The ear plate at the near-angle position of the side wall of the attachment frame 1 is fixed by bolts, the other end of the third connecting rod 6 and the second hoop assembly 3 are fixed by bolts, and one end of the fourth connecting rod 7 is connected to the side wall of the standard section attachment frame 1 The lugs at the far corners are fixed by bolts, and the other end of the fourth connecting rod 7 and the second hoop assembly 3 are fixed by bolts.

The inclination angle α between the first connecting rod 4 and the side of the main building near the side of the tower crane section arm is 84°; the inclination angle β between the second connecting rod 5 and the side of the main building near the side of the tower crane section arm is 63°; the third The inclination angle γ between the connecting rod 6 and the side of the main building near the side of the tower crane section arm is 41°; the inclination angle δ between the fourth connecting rod 7 and the side of the main building near the side of the tower crane section arm is 54°.

The force calculation of the attached wall in this embodiment is as follows:

a) parameter information;

Tower crane height 98.80(m), attached tower crane side length: 2.00(m), attached tower crane maximum overturning moment: 4981.60(kN/m), attached frame width: 2.40(m), slewing torque: 300.00(kN/m), wind Design value of load: 0.5 (kN/m), attachment height of each layer: 42.1, 63.1 (m).

b) Calculation of bearing force;

When the tower crane is attached to the building according to the instructions, the uppermost attachment device has the largest load, so the load of this connecting rod is used as the basis for designing or checking the section of the attachment rod.

The tower body of the attached tower crane can be regarded as a rigid support continuous beam with cantilever, and its internal force and support reaction force are calculated as follows:

in:

W ₀ ──Basic wind pressure (kN/m2), adopted in accordance with the “Code for Loads of Building Structures” (GBJ9): W ₀ =0.4kN/m2;

μ _z — wind load height variation coefficient, adopted in accordance with the provisions of "Code for Loads of Building Structures" (GBJ9): μ _z = 2.380;

μ _s ── wind load body shape coefficient: μ _s = 2.600;

β _z ─ wind vibration coefficient, according to the wind vibration coefficient of the structure at the Z height according to the "Code for Loads of Building Structures", calculate β _z = 1.1;

W _k —— wind load horizontal pressure;

W _k =W ₀ ×μ _z ×μ _s ×β _z =0.4×2.38×2.6×1.1=2.72kN/m ² ; B——the working width of the tower crane, B=2.00m; K _s ——the reduction factor of the windward area , K _s =0.20;

The horizontal force of the wind load is obtained by calculation; the actual value of the wind load is q=0.5kN/m, the maximum overturning moment of the tower crane is M=4981.60kN.m, and the calculation result: Nw=260.379kN.

c) Calculation of the internal force of the attachment rod

The above calculation process will cycle θ from 0-360 degrees to solve the maximum axial pressure and maximum axial tension of each connecting rod:

The maximum axial tension of the third connecting rod 6 is: 221.5kN; the maximum axial pressure of the third connecting rod 6 is: 221.5kN;

The maximum axial tension of the fourth connecting rod 7 is: 273.0kN; the maximum axial pressure of the fourth connecting rod 7 is: 273.0kN;

The maximum axial tension of the first connecting rod 4 is: 416.0kN; the maximum axial pressure of the first connecting rod 4 is: 416.0kN;

The maximum axial tension of the second connecting rod 5 is: 353.0 kN; the maximum axial pressure of the second connecting rod 5 is: 353.0 kN.

d) Checking the strength of the attachment rod:

The attached tie rod adopts 200×200×6 square tube, and the section size is 200×200×6;

The cross-sectional properties of the connecting rod are as follows:

A=46.56cm ² , _Ix =2923.35cm ⁴ ;

Unit weight: 36.55Kg/m.

1) Force analysis:

a. Shaft tension, shaft pressure.

b. Select the first connecting rod 4, with a length of 4.14m, and its maximum force, N=416.0KN.

c. Wind load;

Wind load calculation formula - F _w =C _w p _w A;

In this embodiment, l/h=4140/200=20.7, take C _W =1.75;

This embodiment takes p _w =1100Pa;

Vertical windward area A=4.14×0.20;

F _W =C _W P _W A=1.75×1.1×4.14×0.20=1.59KN;

This force acts on the connecting rod as a horizontal bending moment:

M ₁ =F _W l/10=0.66KN·m.

d. The weight of the connecting rod;

G=4.14×36.55×9.8=1.48KN This force acts on the connecting rod as a vertical bending moment:

M ₂ =Gl/10=0.613KN·m.

e. Strength check of connecting rod

核算；γ_x＝γ_y＝1.05；by formula

Accounting; γ _x = γ _y = 1.05;

Therefore, the strength of the connecting rod meets the requirements.

2) Stability check under pressure;

Check calculation of compressive strength of connecting rod axis: check formula: σ=N/(φ·A _n )≤[σ];

in:

σ──is the compressive stress of the connecting rod;

N—— is the maximum axial tension of the connecting rod;

The fourth connecting rod 7 takes N=273.0kN; the first connecting rod 4: takes N=416.0kN;

φ──is the compression stability coefficient of the connecting rod, which can be obtained by looking up the table according to the value of λ, where λ is the slenderness ratio of the connecting rod;

Slenderness ratio calculation formula:

The length l=8677mm of the fourth connecting rod 7 is calculated as:

According to the λ look-up table, the stability coefficient φ=0.499;

According to the calculation formula:

σ=N/(φ·A _n )=273×1000/0.499/4656=117.5Mpa≤[σ]=170MPa;

fulfil requirements.

The length l=4140mm of the first connecting rod 4 is calculated as:

According to the λ look-up table, the stability coefficient φ=0.847;

According to the calculation formula:

σ=N/(φ·A _n )=416×1000/0.847/4656=105.4Mpa≤[σ]=170MPa

fulfil requirements.

The above is only an embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present invention, several modifications and improvements can be made, which should also be It is regarded as belonging to the protection scope of the present invention.

Claims (3)

1. A tower crane attachment device comprises a standard joint attachment frame, wherein the standard joint attachment frame is fixed between two standard joint arms of a tower crane;

it is characterized in that:

the device comprises four connecting rods and two groups of hoop components;

the two groups of hoop components are respectively matched with two concrete columns on one side, close to the tower crane knuckle arm, of the main building, each hoop component comprises two holding plates and a plurality of fixing bolts, the two holding plates are respectively attached to two sides of the concrete columns of the main building, the two holding plates are fixedly connected through the fixing bolts, and the horizontal heights of the two groups of hoop components are consistent;

the four connecting rods are respectively a first connecting rod and a second connecting rod, the third connecting rod and the fourth connecting rod correspond to one group of hoop components, the third connecting rod and the fourth connecting rod correspond to the other group of hoop components, one end of the first connecting rod is fixedly connected with the near-angle position of the standard knot attaching frame close to one side of the main building, the other end of the first connecting rod is fixedly connected with the corresponding hoop component, one end of the second connecting rod is fixedly connected with the far-angle position of the standard knot attaching frame close to one side of the main building, the other end of the second connecting rod is fixedly connected with the corresponding hoop component, one end of the third connecting rod is fixedly connected with the near-angle position of the side wall of the standard knot attaching frame, the other end of the third connecting rod is fixedly connected with the corresponding hoop component, one end of the fourth connecting rod is fixedly connected with the far-angle position of the side wall of the standard knot attaching frame, and the other end of the fourth connecting rod is fixedly.

2. The tower crane attachment device of claim 1, wherein:

four connecting rod structures are the same, the connecting rod includes first otic placode, first screw thread sleeve pipe, second otic placode and double-thread screw, and first otic placode fixed connection is on first screw thread sleeve pipe, and second otic placode fixed connection is on second screw thread sleeve pipe, and first screw thread sleeve pipe and second screw thread sleeve pipe cooperate with double-thread screw respectively.

3. The tower crane attachment device of claim 1, wherein:

82-86 degrees are formed between the first connecting rod and the side face of the main building close to one side of the tower crane knuckle arm; the angle between the second connecting rod and the side face of the main building close to one side of the joint arm of the tower crane is 60-65 degrees; 40-45 degrees are formed between the third connecting rod and the side face of the main building close to one side of the tower crane knuckle arm; 52-56 degrees are arranged between the fourth connecting rod and the side face of the main building close to one side of the tower crane knuckle arm.

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