A high-strength torsion-resistant cold-bending steel for tower crane

Abstract

The utility model relates to building machinery technical field discloses a tower crane high -strength torsion -resistant cold bending type steel, including steel body one and steel body two, steel body one inside is provided with reinforcing mechanism, reinforcing mechanism includes the upper fixer and lower fixer of setting in the upper and lower sides of steel body one inner wall and is installed the support column between upper fixer and lower fixer, nut is fixed in the inner wall of upper fixer and lower fixer, bolt is from outside and is connected with nut thread, be provided with mounting mechanism between steel body one and steel body two, mounting mechanism includes the positioner of being fixed in the inner wall of steel body one and is installed the support beam of steel body one and steel body two outer wall, and stable stud passes through support beam and is connected in steel body one and steel body two with thread, the utility model discloses through the cooperation of internal cross bracing framework and external positioning clamping plate, reached the effect that the overall firmness and torsional rigidity are improved, realizes quick coaxial positioning installation and prevents the bending fracture of connecting place.

Description

Technical Field

[0001] This utility model relates to the field of construction machinery technology, and in particular to a high-strength torsional cold-bending steel for tower cranes. Background Technology

[0002] Tower cranes are essential vertical transportation machines in modern industrial and civil construction. The standard tower sections and jib structures of tower cranes extensively use cold-formed steel as the main load-bearing components. Cold-formed steel plays an important role in reducing the structural weight of tower cranes and reducing steel consumption due to its reasonable cross-sectional shape, large slewing radius and good bending resistance.

[0003] However, most of the cold-formed steel used in existing tower cranes is a single-walled structure with a hollow interior. When facing the huge wind load generated during the operation of tall tower cranes and the inertial torque generated by slewing and braking, the cold-formed steel lacks an effective supporting frame inside to share the stress, resulting in a limited torsional section modulus. It is very easy for it to undergo radial deformation or buckling instability under strong torque.

[0004] Furthermore, existing cold-formed steel sections lack supporting internal guiding and positioning and external bending reinforcement structures when being extended, making on-site installation and alignment difficult. In addition, the connection parts mainly rely on bolts to bear shear force, which makes the stiffness of the connection node much lower than the stiffness of the rod body. Under long-term alternating loads, the connection is prone to loosening, bending, or even fatigue fracture, which seriously affects the overall structural safety of the tower crane.

[0005] Therefore, this utility model proposes a high-strength torsional cold-bending steel for tower cranes to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems in the existing cold-formed steel used in tower cranes, such as the limited torsional section modulus due to its hollow thin-walled structure, which makes it prone to buckling deformation under strong wind loads and rotational inertia, and the lack of effective internal guiding positioning and external bending reinforcement structures during splicing installation, resulting in difficulties in on-site installation alignment and insufficient stiffness at the connection nodes that easily leads to fatigue fracture, this utility model aims to provide a high-strength torsional cold-formed steel for tower cranes with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a high-strength anti-torsion cold-bending steel for tower cranes, including a steel body one and a steel body two, a reinforcing mechanism disposed inside the steel body one, and an installation mechanism disposed between the steel body one and the steel body two.

[0008] The reinforcement mechanism includes an upper fixator, a lower fixator, a support column, a nut, and a bolt. The upper and lower fixators are respectively installed on the upper and lower sides of the inner wall of the steel body. The support column is installed between the upper and lower fixators. The nut is fixedly connected to the inner wall of the upper and lower fixators, and the bolt is threadedly connected to the inner wall of the nut.

[0009] Furthermore, steel body one and steel body two are combined with the installation mechanism in the following manner: the installation mechanism includes a locator, a support beam, and a stabilizing stud. The locator is fixedly connected to the inner wall of steel body one, steel body two is slidably connected to the outer wall of the locator, the support beam is installed on the outer walls of steel body one and steel body two, and the stabilizing stud is threadedly connected to the inner wall of the support beam.

[0010] Preferably, a threaded hole 1 is provided in the middle of the upper and lower sides of the steel body 1, and a threaded hole 2 is provided on the outer wall of the upper and lower fixing devices at a position communicating with the threaded hole 1, and the diameters of the threaded hole 1 and the threaded hole 2 are matched.

[0011] Preferably, the nut is fixedly connected to the inner wall of the upper and lower fixing devices and is located at the corresponding position of the second threaded hole. The bolt passes through the first threaded hole and the second threaded hole in sequence and forms a threaded fastening connection with the nut.

[0012] Preferably, there are multiple support columns, which are installed crosswise at the inner corners of the upper and lower fixing devices, and both ends of the support columns are fixedly connected to the upper and lower fixing devices respectively, thereby forming a triangular truss support structure inside the steel body.

[0013] Preferably, the outer wall of the positioner slides against the inner wall of the second steel body, and the second steel body and the surface of the positioner are both provided with a fixing hole, which penetrates the tube wall of the second steel body and extends into the interior of the positioner.

[0014] Preferably, a fixing hole is provided on the surface of the steel body one and the positioner. The fixing hole one penetrates the tube wall of the steel body one and extends into the interior of the positioner. The positioner is set inside the joint between the steel body one and the steel body two as a connecting mandrel.

[0015] Preferably, the support beam is located on the outer wall at the joint between steel body one and steel body two, and the support beam has an installation through hole for the stabilizing stud to pass through. The stabilizing stud passes through the installation through hole and extends into the interior of steel body one or steel body two.

[0016] Preferably, the stabilizing studs include a first set of studs and a second set of studs. The first set of studs passes through the support beam and is threaded into a fixing hole one, and the second set of studs passes through the support beam and is threaded into a fixing hole two.

[0017] Preferably, the cross-sectional shape of the locator is adapted to the cross-sectional shape of the inner cavity of steel body one and steel body two, and the inner wall shape of the support beam is fitted to the outer wall shape of steel body one and steel body two, thereby ensuring tight contact and stress transmission at the connection.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model solves the problem of buckling deformation caused by insufficient compressive and torsional stiffness due to the hollow thin-walled structure of cold-formed steel in existing tower cranes by setting a reinforcement mechanism consisting of an upper fixer, a lower fixer, and cross-installed support columns inside the steel body. It achieves the effect of significantly improving the overall robustness, stability, and torsional resistance of the device by using the internal cross-support frame to share the external torque and load.

[0020] 2. This utility model solves the problems of inaccurate centering and positioning during the connection of steel body one and steel body two by setting an installation mechanism including a built-in locator and an external support beam. It also solves the problems of bending and breaking due to stress concentration at the connection node during the existing steel structure docking installation. It achieves the effect of using the locator as a mandrel to realize the rapid coaxial guidance installation between steel bodies and using the external support beam as a clamp to share the bending moment at the connection, thereby preventing the connection from breaking.

[0021] 3. This utility model solves the problem of connection failure caused by loosening and falling off in the high-frequency vibration environment of tower cranes by passing a stabilizing stud through the through hole on the support beam and locking it into the fixing holes of steel body one and steel body two respectively. It achieves the effect of firmly anchoring multiple steel body sections and external reinforcement components into one, thereby improving the overall structure and construction safety. Attached Figure Description

[0022] Figure 1 This is a front perspective view of a high-strength torsion-resistant cold-bent steel profile for a tower crane proposed in this utility model.

[0023] Figure 2 This is a side view of a high-strength torsional cold-bending steel profile for a tower crane proposed in this utility model.

[0024] Figure 3 This is a partial exploded view of the support beam of a tower crane made of high-strength torsion-resistant cold-bent steel, as proposed in this utility model.

[0025] Figure 4 This is a partial structural diagram of the steel body of a high-strength torsion-resistant cold-bending steel for a tower crane proposed in this utility model.

[0026] Figure 5 This is a partial structural breakdown diagram of the upper fixing device of a high-strength torsion-resistant cold-bent steel for a tower crane proposed in this utility model.

[0027] Figure 6 This is a partial structural breakdown diagram of the support column of a tower crane made of high-strength torsion-resistant cold-bent steel, as proposed in this utility model.

[0028] Legend:

[0029] 1. Steel body one; 2. Reinforcing mechanism; 201. Threaded hole one; 202. Upper fixing device; 203. Lower fixing device; 204. Support column; 205. Nut; 206. Bolt; 207. Threaded hole two; 3. Installation mechanism; 301. Steel body two; 302. Positioner; 303. Fixing hole one; 304. Fixing hole two; 305. Support beam; 306. Stabilizing stud. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0031] Example:

[0032] Please refer to Figures 1 to 6 This utility model provides a high-strength anti-torsion cold-bending steel for tower cranes, which aims to solve the problems of torsional deformation, joint breakage, and low installation and positioning efficiency that easily occur in the steel structure of tower cranes under heavy loads and wind loads in the prior art.

[0033] Please refer to Figure 1 and Figure 2 A high-strength torsion-resistant cold-bending steel profile for tower cranes includes a steel body 1 and a steel body 2 301 slidably connected to one side of the steel body 1. The steel body 1 serves as the main load-bearing member to withstand vertical loads and lateral torques. The steel body 2 301 serves as an extension connecting member to cooperate with the steel body 1 to form a continuous standard section structure for the tower crane. The steel body 1 is internally equipped with a reinforcement mechanism 2 to enhance the cross-sectional stiffness. The connection between the steel body 1 and the steel body 2 301 is equipped with an installation mechanism 3 for quick positioning and locking. Through the cooperation of the reinforcement mechanism 2 and the installation mechanism 3, the entire device forms a high-strength structure with an internal frame support and an external clamping plate for locking.

[0034] Please refer to Figure 5 and Figure 6For the reinforcement mechanism 2, the upper fixing device 202 and the lower fixing device 203 are respectively attached to the upper and lower surfaces of the inner wall of the steel body 1. The support column 204 is fixedly installed between the upper fixing device 202 and the lower fixing device 203, thereby forming a rigid support frame between the upper fixing device 202 and the lower fixing device 203. The nut 205 is welded and fixed to the inner side wall of the upper fixing device 202 and the lower fixing device 203. The bolt 206 is inserted from the outside of the steel body 1 and screwed into the internal thread hole of the nut 205. The upper fixing device 202 and the lower fixing device 203 are firmly locked to the inner wall of the steel body 1 by the threaded fastening of the bolt 206 and the nut 205, thereby using the internal support column 204 to share the external torque and pressure on the steel body 1.

[0035] At the same time, please refer to Figure 3 For the installation mechanism 3, one end of the locator 302 is fixedly inserted into the inner wall of the port of the steel body 1, and the other end of the locator 302 extends out of the steel body 1 and is inserted into the inner cavity of the steel body 2 301 as a guide mandrel. The inner wall of the steel body 2 301 slides and engages with the outer wall of the locator 302. The support beam 305 fits and covers the outer surface of the connection between the steel body 1 and the steel body 2 301. The stabilizing stud 306 is threaded through the support beam 305 and further screwed into the tube wall of the steel body 1 and the steel body 2 301. This matching structure of internal positioning mandrel and external support clamp ensures the coaxiality of the steel body 1 and the steel body 2 301 when they are docked and the high bending resistance of the connection node.

[0036] In a preferred embodiment, in order to achieve precise alignment and locking between the reinforcing mechanism 2 and the steel body 1, a through threaded hole 201 is opened in the middle of the upper and lower side walls of the steel body 1. A threaded hole 207 is opened on the outer wall of the upper fixture 202 and the lower fixture 203 at a position corresponding to the threaded hole 201. The diameters of the threaded holes 201 and 207 are matched. The nut 205 is fixedly installed on the inner wall of the upper fixture 202 and the lower fixture 203 and precisely covers the position of the threaded hole 207. The bolt 206 passes through the threaded hole 201 on the steel body 1 and the threaded hole 207 on the fixture in sequence and is finally tightened in the nut 205, thereby connecting the outer steel body 1 and the inner reinforcing component into one unit.

[0037] As another preferred embodiment, in order to maximize the torsional resistance of the internal frame, the number of support columns 204 is set to multiple. The multiple support columns 204 are welded and installed in a cross shape at the inner corner of the upper fixer 202 and the lower fixer 203. The cross-arranged support columns 204 form a stable truss-type triangular force-bearing structure, which can effectively resist shear forces and torques from all directions.

[0038] As a further preferred embodiment, in order to achieve rapid positioning and anti-detachment connection of the second steel body 301, the outer shape of the locator 302 is closely fitted with the inner cavity shape of the second steel body 301. The tube wall surface of the second steel body 301 and the surface of the locator 302 are connected through a fixing hole 304. The tube wall surface of the first steel body 1 and the surface of the locator 302 are connected through a fixing hole 303. The stabilizing studs 306 include a first set of studs and a second set of studs. The first set of studs passes through the mounting through hole on the support beam 305 and is threaded and locked in the fixing hole 303. The second set of studs passes through the mounting through hole on the support beam 305 and is threaded and locked in the fixing hole 304. Thus, the support beam 305 firmly anchors the first steel body 1, the locator 302 and the second steel body 301 together.

[0039] Working Principle: When using the device, the high-strength, torsion-resistant cold-bent steel of the tower crane serves as the main load-bearing member, needing to withstand enormous axial loads and torsional forces. To enhance the robustness and torsional resistance of the single steel body 1, threaded holes 201 are provided at the middle of the upper and lower sides of the steel body 1. Threaded holes 207 are provided where the upper fixing device 202 and the lower fixing device 203 connect to threaded hole 201. Nuts 205 are fixedly connected to the inner walls of the upper fixing device 202 and the lower fixing device 203 and... The bolt 206 passes through the threaded hole 201 and the threaded hole 207 from the outside and is threaded to the inner wall of the nut 205. The upper fixing device 202, the lower fixing device 203 and the steel body 1 are fastened together through the threaded connection between the bolt 206 and the nut 205. At the same time, the support column 204 is installed crosswise at the corner of the inner wall of the upper fixing device 202 and the lower fixing device 203. The internal support column 204 forms a stable structural frame to support the steel body 1.

[0040] During installation, multiple steel bodies need to be quickly positioned and connected. A locator 302 is fixedly connected to the inner wall of steel body 1 as a connecting spindle. The inner wall of steel body 2 301 is slidably connected to the outer wall of the locator 302, realizing the quick centering and positioning of steel body 2 301 and steel body 1. Fixing holes 1 303 are opened on the surface of steel body 1 and locator 302, and fixing holes 2 304 are opened on the surface of steel body 2 301 and locator 302. The support beam 305 is fitted and installed at the connection between the outer walls of steel body 1 and steel body 2 301. The stabilizing stud 306 is threaded to the inner wall of the support beam 305 and is threaded into fixing holes 1 303 and 2 304 after passing through the through hole on the support beam 305. The threaded connection between the stabilizing stud 306 and fixing holes 2 304 and 1 303 fixes steel body 2 301 and steel body 1, and the support beam 305 provides external reinforcement to the connection.

Claims

1. A high-strength torsion-resistant cold-bending steel for tower cranes, comprising steel body one (1) and steel body two (301). Its features are, The steel body (1) is provided with a reinforcement mechanism (2). The reinforcement mechanism (2) includes an upper fixer (202), a lower fixer (203), a support column (204), a nut (205), and a bolt (206). The upper fixer (202) and the lower fixer (203) are respectively disposed on the upper and lower sides of the inner wall of the steel body (1). The support column (204) is installed between the upper fixer (202) and the lower fixer (203). The nut (205) is fixedly connected to the inner wall of the upper fixer (202) and the lower fixer (203). The bolt (206) is threadedly connected to the inner wall of the nut (205). An installation mechanism (3) is provided between the first steel body (1) and the second steel body (301). The installation mechanism (3) includes a locator (302), a support beam (305), and a stabilizing stud (306). The locator (302) is fixedly connected to the inner wall of the first steel body (1), the second steel body (301) is slidably connected to the outer wall of the locator (302), the support beam (305) is installed on the outer walls of the first steel body (1) and the second steel body (301), and the stabilizing stud (306) is threadedly connected to the inner wall of the support beam (305).

2. The high-strength torsional cold-formed steel for tower cranes according to claim 1, characterized in that, The steel body (1) has a threaded hole (201) in the middle of the upper and lower sides. The upper fixture (202) and the lower fixture (203) have a threaded hole (207) in the position where they are connected to the threaded hole (201). The diameters of the threaded hole (201) and the threaded hole (207) are matched.

3. The high-strength torsional cold-bent steel for tower cranes according to claim 2, characterized in that, The nut (205) is fixedly connected to the inner wall of the upper fixture (202) and the lower fixture (203) and is located at the corresponding position of the second threaded hole (207). The bolt (206) passes through the first threaded hole (201) and the second threaded hole (207) in sequence and forms a threaded fastening connection with the nut (205).

4. The high-strength torsional cold-formed steel for tower cranes according to claim 1, characterized in that, The support column (204) consists of multiple columns, which are installed crosswise at the inner corners of the upper fixture (202) and the lower fixture (203), and both ends of the support column (204) are fixedly connected to the upper fixture (202) and the lower fixture (203) respectively.

5. The high-strength torsional cold-formed steel for tower cranes according to claim 1, characterized in that, The outer wall of the locator (302) slides against the inner wall of the steel body (301). The surface of the steel body (301) and the locator (302) are provided with a fixing hole (304). The fixing hole (304) penetrates the tube wall of the steel body (301) and extends into the interior of the locator (302).

6. The high-strength torsional cold-formed steel for tower cranes according to claim 5, characterized in that, The surface of the first steel body (1) and the positioner (302) are provided with a fixing hole (303). The fixing hole (303) penetrates the tube wall of the first steel body (1) and extends into the interior of the positioner (302). The positioner (302) is set as a connecting mandrel inside the joint between the first steel body (1) and the second steel body (301).

7. A high-strength, torsional-resistant cold-formed steel profile for tower cranes according to claim 6, characterized in that, The support beam (305) is disposed on the outer wall at the junction of the first steel body (1) and the second steel body (301). The support beam (305) has an installation through hole for the stabilizing stud (306) to pass through. The stabilizing stud (306) passes through the installation through hole and extends into the interior of the first steel body (1) or the second steel body (301).

8. A high-strength, torsional-resistant cold-formed steel profile for tower cranes according to claim 6 or 7, characterized in that, The stabilizing stud (306) includes a first set of studs and a second set of studs. The first set of studs passes through the support beam (305) and is threaded to the first fixing hole (303). The second set of studs passes through the support beam (305) and is threaded to the second fixing hole (304).

9. A high-strength, torsional-resistant cold-formed steel profile for tower cranes according to claim 1, characterized in that, The cross-sectional shape of the locator (302) is adapted to the cross-sectional shape of the inner cavity of the first steel body (1) and the second steel body (301), and the inner wall shape of the support beam (305) is fitted to the outer wall shape of the first steel body (1) and the second steel body (301).

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