Tower self-supporting device, tower crane and tower self-supporting method

Abstract

A tower self-supporting device, a tower crane and a tower self-supporting method. The tower (600) self-supporting device comprises a supporting arm (400), a tie rod tensioning mechanism and a force-measuring control assembly, wherein the supporting arm (400) is disposed on the tower; the tie rod tensioning mechanism comprises a telescopic driving member (300) and a tie rod assembly (10), the telescopic driving member (300) is disposed on a tower base (610) with a driving end facing upward, and two ends of the tie rod assembly (10) are correspondingly connected to the driving end of the telescopic driving member (300) and the supporting arm (400) on a one-to-one basis; and the force-measuring control assembly is used for measuring the tensioning force of the tie rod tensioning mechanism and generating an over-limit instruction when measured data exceeds a safety threshold range. During operation of the tower crane, by means of the additionally provided force-measuring control assembly, the tensioning force of the tie rod tensioning mechanism can be measured, and an over-limit instruction can be generated when measured data exceeds the safety threshold range, so as to give a prompt for corresponding handling, thereby avoiding the phenomenon of excessive stress on the tie rod assembly (10), and improving the working safety of the entire tower crane.

Description

Tower self-supporting device, tower crane and tower self-supporting method

[0001] This application claims priority to Chinese Patent Application No. 202410944048.1, filed on July 15, 2024, entitled "Tower Self-Supporting Device, Tower Crane and Tower Self-Supporting Method", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application belongs to the field of lifting machinery technology, and in particular relates to a self-supporting tower device, a tower crane, and a self-supporting tower method. Background Technology

[0003] Once a tower crane's operating height exceeds its freestanding height, it generally requires an anchoring device to connect the tower body to the building to ensure the crane's stability. However, some tower cranes (e.g., wind turbine jib tower cranes) are installed near buildings, making anchoring impossible. In such cases, to ensure a higher freestanding height, a support device can be added to the upper section of the tower. The tie rod structure in this support device can be located between the upper section of the tower and the base, and tensioned by a hydraulic cylinder. However, during tower crane operation, tower deformation can easily lead to excessive stress in the tie rod structure. Technical solutions

[0004] To address the aforementioned deficiencies or shortcomings, this application provides a self-supporting tower device, a tower crane, and a self-supporting tower method, aiming to solve the technical problem that existing tower support devices are prone to excessive stress during tower crane operation.

[0005] To achieve the above objectives, the first aspect of this application provides a self-supporting tower device, comprising a support arm, a tie rod tensioning mechanism, and a force control assembly; the support arm is mounted on the tower body; the tie rod tensioning mechanism includes a telescopic drive component and a tie rod assembly, the telescopic drive component is mounted on the tower base with its drive end facing upwards, and both ends of the tie rod assembly are respectively connected to the drive end of the telescopic drive component and the support arm; the force control assembly is used to detect the tension force of the tie rod tensioning mechanism and generate an over-limit command if the detected data exceeds the safety threshold range.

[0006] In this embodiment, the force control component includes a controller and a force sensor. The force sensor is used to detect the tension force of the tie rod tensioning mechanism. The controller is communicatively connected to both the force sensor and the telescopic drive component, and is configured to:

[0007] Receive detection data from the force sensor;

[0008] An over-limit command is generated when the detected data exceeds the safety threshold.

[0009] The telescopic drive is controlled according to the over-limit command so that the detection data of the force sensor is reduced to within the safe threshold range.

[0010] In this embodiment, the force control component includes a controller, a force sensor, and an alarm. The force sensor is used to detect the tension force of the tie rod tensioning mechanism. The controller is communicatively connected to both the force sensor and the alarm, and is configured to:

[0011] Receive detection data from the force sensor;

[0012] An over-limit command is generated when the detected data exceeds the safety threshold.

[0013] The alarm is triggered based on the over-limit command.

[0014] In this embodiment of the application, the installation height of the support arm on the tower body is H = (0.5~0.6)H0, where H0 is the total height of the tower body.

[0015] In this embodiment of the application, the formula for calculating the length L0 of the support arm is: L0 + L / 2 = K / (3~5), where K is the distance between the two diagonally arranged telescopic drive members, and L is the diagonal center distance of the tower body.

[0016] In this embodiment, the support arm is detachably installed on the main chord of the tower standard section and extends diagonally along the tower standard section. The height of the support arm is gradually reduced in the outward extension direction of the main chord, so that the inner end of the support arm can be provided with at least two first connecting parts that are detachably connected to the main chord, and the outer end of the support arm can be provided with at least one second connecting part that is connected to the tie rod assembly.

[0017] In this embodiment of the application, the support arm includes an upper connecting beam, a lower connecting beam, and a belly connecting structure. The upper connecting beam and the lower connecting beam are arranged alternately from top to bottom and both extend outward from the main chord. The upper connecting beam and the lower connecting beam are gradually moved closer together in the outward extension direction of the main chord. The belly connecting structure connects the upper connecting beam and the lower connecting beam. The inner end of the upper connecting beam and the inner end of the lower connecting beam both have a first connecting part.

[0018] In this embodiment, the telescopic drive includes a cylinder, a movable rod, and a locking nut. The cylinder is mounted on the tower base. The movable rod is movably mounted inside the cylinder and extends out of the cylinder at both ends. The first end of the movable rod facing upward is the drive end, and the second end of the movable rod facing downward is the externally threaded rod body. The locking nut is fitted onto the externally threaded rod body and can be tightened to abut against the cylinder.

[0019] In this embodiment, the tie rod tensioning mechanism further includes at least two tie plates that are sequentially spaced around the cylinder body on the tower base. The at least two tie plates are respectively connected to the cylinder body and can support the first end of the movable rod inside the cylinder body to be facing upward. The tie plates are provided with a force sensor in the force control assembly for detecting the tensioning force of the tie rod tensioning mechanism.

[0020] In this embodiment, the pull rod assembly includes pull rod units, and the number of pull rod units is at least two. The at least two pull rod units are sequentially connected to each other so that the pull rod assembly can switch between an extended state and a retracted state.

[0021] In this embodiment, at least two pull rod units are arranged sequentially along the length direction. Any two adjacent pull rod units are connected by a connecting unit. The two ends of the connecting unit are respectively provided with a first hinge part and a second hinge part. The two adjacent pull rod units are respectively movably hinged to the first hinge part and the second hinge part, so that at least two pull rod units can be flipped sequentially and can switch between an extended state and a folded state. At least two pull rod units can be arranged horizontally along the height direction in the folded state.

[0022] In this embodiment, at least two pull rod units are arranged sequentially along the length direction, and any two adjacent pull rod units are connected by a pin structure. At least two pull rod units form a folding accommodating space. The end of the latter pull rod unit can extend into the folding accommodating space of the former pull rod unit and be movably hinged by the pin structure, so that at least two pull rod units can be flipped sequentially and can switch between an extended state and a folded state. When the latter pull rod unit is in the folded state, it can be placed horizontally in the folding accommodating space of the former pull rod unit.

[0023] In this embodiment, at least two pull rod units are configured as telescopic cylinder units and are sequentially telescopically mounted in a direction from the inside to the outside, so that the pull rod assembly can switch between an extended state and a retracted state.

[0024] In this embodiment of the application, the self-supporting tower body device further includes an auxiliary hoisting mechanism disposed on the counterweight arm and used for hoisting the support arm. The slewing radius of the hoisting hook in the auxiliary hoisting mechanism on the tower body is set to be not less than the distance between the hoisting center of gravity of the support arm and the tower body.

[0025] To achieve the above objectives, a second aspect of this application provides a tower crane, wherein the tower crane includes a self-supporting tower body device as described above.

[0026] To achieve the above objectives, a third aspect of this application provides a self-supporting method for a tower body, wherein the self-supporting method for a tower body includes:

[0027] Install the support arm to the preset height position;

[0028] Connect the two ends of the pull rod assembly to the drive end of the telescopic drive component and the support arm respectively;

[0029] Control the telescopic drive component to stretch the tie rod assembly with a preset preload tension;

[0030] The tension force is tested while the tower crane is in operation;

[0031] An over-limit command is generated if the measured tension data exceeds the safety threshold.

[0032] In this embodiment, a movable rod is provided inside the cylinder of the telescopic drive member, and both ends of the movable rod extend out of the cylinder. The first end of the movable rod facing upward is connected to the pull rod assembly, and the second end facing downward is fitted with a screw-on locking nut. Controlling the telescopic drive member to stretch the pull rod assembly with a preset preload includes:

[0033] Control the telescopic drive component to extend the tie rod assembly;

[0034] When the tension applied to the tie rod assembly by the telescopic drive reaches the preset preload, adjust the locking nut so that the locking nut is tightened to abut against the cylinder body.

[0035] In this embodiment of the application, before installing the support arm to the preset height position, the following steps are included: determining the installation height and length of the support arm.

[0036] In this embodiment of the application, installing the support arm to a preset height position includes:

[0037] An auxiliary hoisting mechanism is installed on the counterweight boom, wherein the slewing radius of the hoisting hook in the auxiliary hoisting mechanism on the tower body is set to be no less than the distance between the hoisting center of gravity of the support boom and the tower body;

[0038] The support arm is hoisted to the preset height using an auxiliary hoisting mechanism, and then connected to the tower body. Beneficial effects

[0039] When using the aforementioned self-supporting tower structure, which includes a support arm, a tie rod tensioning mechanism, and a force control assembly, the support arm is mounted on the tower body. The telescopic drive component in the tie rod tensioning mechanism is mounted on the tower base with its drive end facing upwards. Both ends of the tie rod assembly are connected one-to-one with the drive end of the telescopic drive component and the support arm, respectively. By pulling the tie rod assembly through the telescopic drive component, tension support for the tower body can be achieved. Furthermore, the force control assembly added during tower crane operation can detect the tension force of the tie rod tensioning mechanism and generate an over-limit command if the detected data exceeds the safety threshold range. This prompts for appropriate handling, preventing the tie rod assembly from experiencing excessive stress and improving the overall safety of the tower crane operation. Attached Figure Description

[0040] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0041] Figure 1 is a schematic diagram of the structure of a self-supporting device for tensioning and supporting the tower body, which is installed on a standard section of the tower body according to an embodiment of this application.

[0042] Figure 2 is a schematic diagram of the structure of the self-supporting device for tensioning and supporting the tower body, which is installed on the transition section according to an embodiment of the present application;

[0043] Figure 3 is a schematic diagram of the support arm installed on the main chord according to an embodiment of the present application;

[0044] Figure 4 is a schematic diagram of the connection between the support arm and the tie rod assembly according to an embodiment of this application;

[0045] Figure 5 is a structural schematic diagram of the support arm according to an embodiment of this application;

[0046] Figure 6 is a structural schematic diagram of the support arm according to another embodiment of this application;

[0047] Figure 7 is a structural schematic diagram of a telescopic drive (telescopic cylinder) according to an embodiment of this application;

[0048] Figure 8 is a structural schematic diagram of the pull rod assembly in a folded and retracted state according to the first embodiment of this application;

[0049] Figure 9 is a structural schematic diagram of the pull plate unit according to the first embodiment of this application;

[0050] Figure 10 is an enlarged structural diagram of point A in Figure 9;

[0051] Figure 11 is a schematic diagram of the structure of the connecting unit according to the first embodiment of this application;

[0052] Figure 12 is a schematic diagram of the pull rod assembly in a folded and retracted state according to the second embodiment of this application;

[0053] Figure 13 is a schematic diagram of the tie rod assembly in the extended state according to the second embodiment of this application;

[0054] Figure 14 is a partially enlarged structural schematic diagram of Figure 13;

[0055] Figure 15 is a structural schematic diagram of the tie rod assembly according to the third embodiment of this application;

[0056] Figure 16 is a partially enlarged structural schematic diagram of Figure 15;

[0057] Figure 17 is a structural schematic diagram of an auxiliary hoisting mechanism according to an embodiment of this application;

[0058] Figure 18 is a flowchart of a tower self-supporting method according to an embodiment of this application;

[0059] Figure 19 is a schematic diagram showing the dimensioning of parameters H0, H and K according to an embodiment of this application;

[0060] Figure 20 is a schematic diagram of the dimensioning of parameters D, L0 and L at point B in Figure 18. Detailed Implementation

[0061] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this application.

[0062] The self-supporting tower device, tower crane, and self-supporting tower method of this application are described below with reference to the accompanying drawings.

[0063] As shown in Figures 1 and 2, this application provides a self-supporting tower device, wherein the self-supporting tower device includes:

[0064] The support arm is 400mm long and is mounted on the tower body 600mm long.

[0065] The tie rod tensioning mechanism includes a telescopic drive component 300 and a tie rod assembly 10. The telescopic drive component 300 is mounted on the tower base 610 with its drive end facing upward. The two ends of the tie rod assembly 10 are respectively connected to the drive end of the telescopic drive component 300 and the support arm 400.

[0066] The force control component is used to detect the tension force of the tie rod tensioning mechanism and generate an over-limit command if the detected data exceeds the safety threshold range.

[0067] When using the aforementioned self-supporting tower structure, the structure includes a support arm 400, a tie rod tensioning mechanism, and a force control component. The support arm 400 is mounted on the tower structure 600, and the telescopic drive component 300 in the tie rod tensioning mechanism is mounted on the tower base 610 with its drive end facing upwards. The two ends of the tie rod assembly 10 are respectively connected to the drive end of the telescopic drive component 300 and the support arm 400. By pulling the tie rod assembly 10 through the telescopic drive component 300, tension support for the tower structure 600 can be achieved. Furthermore, the force control component added during tower crane operation can detect the tension force of the tie rod tensioning mechanism and generate an over-limit command if the detected data exceeds the safety threshold range, so as to prompt for corresponding processing and avoid the phenomenon of excessive stress in the tie rod assembly 10, thereby improving the overall safety of tower crane operation.

[0068] Specifically, as shown in Figure 1, the support arm 400 can be installed on the standard section of the tower body. As shown in Figure 2, the support arm 400 can also be installed on the transition section 700. The installation position of the support arm 400 is selected according to the specific situation. Generally, the support arm 400 can be installed on the upper section of the tower body 600, specifically above 1 / 3 of the tower body height. Meanwhile, the tower base 610 can refer to the tower body frame or a fixed foundation (concrete foundation). Installing the telescopic drive component 300 on the tower base 610 facilitates the control and adjustment of the telescopic drive component 300. The telescopic drive component 300 can be a telescopic hydraulic cylinder, a telescopic pneumatic cylinder, or a telescopic electric cylinder, etc. The following embodiments will use a telescopic hydraulic cylinder for specific explanation.

[0069] It should be noted that the over-limit commands generated by the force measurement and control component include, but are not limited to, issuing alarms to prompt relevant personnel to take action to relieve the over-limit, or controlling relevant devices to automatically adjust to automatically relieve the over-limit.

[0070] Referring to Figures 1, 2, and 7, in this embodiment, the force control component includes a controller and a force sensor 341. The force sensor 341 is used to detect the tension force of the tie rod tensioning mechanism. The controller is communicatively connected to both the force sensor 341 and the telescopic drive 300, and is configured as follows:

[0071] Receive detection data from force sensor 341;

[0072] An over-limit command is generated when the detected data exceeds the safety threshold.

[0073] The telescopic drive component 300 is controlled according to the over-limit command so that the detection data of the force sensor 341 is reduced to within the safe threshold range.

[0074] Furthermore, after receiving the detection data from the force sensor 341, the controller first compares the detection data with a pre-stored safety threshold range to obtain a comparison result. If the comparison result indicates that the detection data exceeds the safety threshold range, an over-limit command is generated. Conversely, if the detection data is within the safety threshold range, no over-limit command is generated. The generation of the over-limit command enables the controller to automatically control and adjust the telescopic drive component 300. The adjustment result must meet the requirement that the subsequent detection data from the force sensor 341 decreases to within the safety threshold range, thereby achieving the purpose of quickly releasing the over-limit. More specifically, based on the over-limit command, the controller can control the telescopic drive component 300 to extend or retract in the direction of the release lever assembly 10.

[0075] In this embodiment, the force control component includes a controller, a force sensor 341, and an alarm. The force sensor 341 is used to detect the tension force of the tie rod tensioning mechanism. The controller is communicatively connected to both the force sensor 341 and the alarm, and is configured to:

[0076] Receive detection data from force sensor 341;

[0077] An over-limit command is generated when the detected data exceeds the safety threshold.

[0078] The alarm is triggered based on the over-limit command.

[0079] Furthermore, after receiving the detection data from the force sensor 341, the controller first compares the detection data with a pre-stored safety threshold range to obtain a comparison result. If the comparison result indicates that the detection data exceeds the safety threshold range, an over-limit command is generated. Conversely, if the detection data is within the safety threshold range, no over-limit command is generated. The generation of the over-limit command enables the controller to activate the alarm to prompt the relevant personnel to take action to resolve the over-limit situation. The alarm will not stop emitting alarms until the over-limit situation is resolved. Furthermore, the alarm may include, but is not limited to, a buzzer or a tri-color light alarm.

[0080] In this embodiment, the installation height H of the support arm 400 on the tower body 600 is (0.5~0.6)H0, where H0 is the total height of the tower body. The specific dimensions of parameters H and H0 can be found in Figure 19.

[0081] Understandably, the connection strength between the standard sections of the tower is one of the key factors limiting the tower height. If pin connections are used, and the pull-out force that the pin connection can withstand is denoted as F, and the maximum pull-out force of the tower crane's main chord is the pull-out force F between the standard sections of the tower, then the formula for calculating the pull-out force F can be set as follows:

[0082] In the formula, M max - Unbalanced moment, L - diagonal center distance of the tower body, V - vertical force of the tower body.

[0083] From the formula for calculating pull-out force, it can be seen that M max The larger the value of F, the larger the value of L remains constant. As the tower height increases, if there is no supporting structure, the bending moment M will increase. max The bending moment transmitted to the bottom tower base 610 will be greater, and F will increase. When F is restricted by the connection joint of the tower body 600, the tower body 600 can no longer be increased.

[0084] After adding the self-supporting device provided in this application to the tower body 600, a portion of the bending moment M at the head of the tower body 600 will be transferred to the tower base 610 through this device, thereby greatly reducing the bending moment of the tower body. Therefore, the tower body 600 can be further heightened. Specifically, the design of the installation height H of the support arm 400 on the tower body 600 needs to consider the influence of the real-time strength σ of the joint strength between the standard sections of the tower body. The real-time strength refers to the real-time stress of the joint when the tower crane is lifting different loads. Let y = σ, x = H / H0, and H0 be set as the total height of the tower body. The formula is calculated through multiple iterations of the finite element model: y = -227551x 4 +540035x 3 -475618x 2 +184308x-26271 can be used to calculate that y has a minimum value when x = 0.5 to 0.6, which can further reduce the joint strength.

[0085] In this embodiment, the length L0 of the support arm 400 is calculated using the formula: L0 + L / 2 = K / (3~5), where K is the distance between the two diagonally positioned telescopic drive members 300, and L is the diagonal center distance of the tower body. For detailed dimensioning of parameters K, L0, and L, please refer to Figures 19 and 20.

[0086] Specifically, the number of support arms 400 and tie rod tensioning mechanisms in the entire self-supporting device can be four. The four support arms 400 are detachably connected to the four main chords 620 on the standard section of the tower body, and the four support arms 400 extend along the diagonal direction corresponding to the standard section of the tower body. The four tie rod tensioning mechanisms are respectively set to correspond to the four support arms 400. The number of force sensors 341 in the force control component can also be four. The four force sensors 341 are respectively used to detect the tension of the four tie rod tensioning mechanisms.

[0087] To ensure the entire self-supporting device forms a conical shape to support the tower body 600 and achieves optimal support, the length of each support arm 400 needs to be designed. After determining the installation height of the support arm 400, the length D from the outer end of the support arm 400 (i.e., the connection end of the tie rod assembly 10) to the center of the tower body can be determined to be within the range of K / 3 to K / 5. Specifically, D = K / 4 provides the best support effect. Furthermore, based on the installation method of the support arm 400, L0 + L / 2 = D can be derived, thus obtaining the relationship between the length L0 of the support arm 400 and K and L. More specifically, when D = K / 3 to K / 5, the formula for calculating the length L0 of the support arm 400 is: L0 + L / 2 = K / (3~5); when D = K / 4 is preferred, the formula for calculating the length L0 of the support arm 400 is: L0 + L / 2 = K / 4. It should be noted that regardless of the installation method of the support arm 400 on the standard section, the above length design formula for the support arm 400 can meet the requirements.

[0088] Referring to Figures 3 to 6, in this embodiment, the support arm 400 is detachably mounted on the main chord 620 of the tower standard section and extends diagonally along the tower standard section. This means the support arm 400 directly supports the main chord 620, thus reinforcing it. Furthermore, the height of the support arm 400 gradually decreases in the outward extension direction of the main chord 620, allowing the inner end of the support arm 400 to have at least two first connecting portions 450 detachably connected to the main chord 620, and the outer end of the support arm 400 to have at least one second connecting portion 460 connected to the tie rod assembly 10. This ensures that while increasing the connection strength between the support frame and the main chord 620, the support arm 400 also provides a tensile strength to the tie rod assembly 10.

[0089] Specifically, the inner end of the support arm 400 has two first connecting portions 450 arranged sequentially from top to bottom, and each first connecting portion 450 has two opposing forked lugs. The main chord 620 can be clamped between the two forked lugs of each first connecting portion 450, and the two forked lugs can be detachably connected by fasteners to achieve detachable installation of the first connecting portion 450 on the main chord 620. The outer end of the support arm 400 may have a second connecting portion 460 with a hole structure to facilitate detachable connection with the tie rod assembly 10. It should be noted that the inner end refers to the end located closer to the main chord 620, and the outer end refers to the end located away from the main chord 620.

[0090] In this embodiment, the support arm 400 includes an upper connecting beam 410, a lower connecting beam 420, and a belly connecting structure. The upper connecting beam 410 and the lower connecting beam 420 are arranged sequentially from top to bottom at intervals and both extend outward from the main chord 620. Furthermore, the upper connecting beam 410 and the lower connecting beam 420 gradually approach each other in the outward extension direction of the main chord 620. The belly connecting structure connects the upper connecting beam 410 and the lower connecting beam 420. Both the inner ends of the upper connecting beam 410 and the lower connecting beam 420 have a first connecting portion 450. That is, by providing the first connecting portion 450 on the upper connecting beam 410 and the lower connecting beam 420 respectively, both connection strength and ease of manufacturing of the support arm 400 can be ensured. In addition, the belly connecting structure can further enhance the connection strength. Specifically, the outer ends of the upper connecting beam 410 and the lower connecting beam 420 can be connected by the second connecting part 460. Of course, this application is not limited to this. The outer ends of the upper connecting beam 410 and the lower connecting beam 420 can also be provided at intervals, and the second connecting part 460 is provided at the outer end of the lower connecting beam 420 or at a position close to the outer end.

[0091] As shown in Figures 3 to 5, in one embodiment of this application, the abdominal connection structure can be configured as multiple abdominal rods 430, and the multiple abdominal rods 430 are arranged sequentially at intervals along the extension direction of the support arm 400 and are all placed between the upper connecting beam 410 and the lower connecting beam 420. The upper and lower ends of each abdominal rod 430 are respectively connected to the upper connecting beam 410 and the lower connecting beam 420. In addition, the upper connecting beam 410 and the lower connecting beam 420 can both be made of H-beams, and a connecting reinforcing plate 470 is also provided between the upper connecting beam 410 and the lower connecting beam 420. The reinforcing plate 470 is located on the outermost side of the multiple abdominal rods 430.

[0092] As shown in Figure 6, in another embodiment of this application, the abdominal connecting structure can be a web plate 440. The web plate 440 is trapezoidal and is placed between the upper connecting beam 410 and the lower connecting beam 420. The upper and lower ends of the web plate 440 are respectively connected to the upper connecting beam 410 and the lower connecting beam 420. In addition, both the upper connecting beam 410 and the lower connecting beam 420 can be flat plates.

[0093] As shown in Figures 1, 2, and 7, in this embodiment of the application, the telescopic drive component 300 includes a cylinder body 310, a movable rod 320, and a locking nut 330. The cylinder body 310 is mounted on the tower base 610. The movable rod 320 is movably mounted inside the cylinder body 310, with both ends extending out of the cylinder body 310. The first end of the movable rod 320 facing upwards is the drive end, and the second end of the movable rod 320 facing downwards is the externally threaded rod body 321. The locking nut 330 is fitted onto the externally threaded rod body 321 and can be tightened to abut against the cylinder body 310. After the cylinder body 310 is mounted on the tower base 610, and the tie rod assembly 10 is connected to the first end of the moving rod 320 and the support arm 400 respectively, the telescopic drive 300 can be controlled to tension and pull the tie rod assembly 10. When the moving rod 320 moves to the preset tension value (preload), the locking nut 330 is adjusted so that it is tightened to abut against the cylinder body 310. This distributes the tension force on the moving rod 320 to the cylinder body 310, thereby significantly reducing the size of the cylinder and achieving cost reduction. Specifically, when the telescopic drive 300 is configured as a telescopic cylinder, the moving rod 320 is the piston rod.

[0094] In this embodiment, the tensioning mechanism further includes at least two pull plates 340 arranged sequentially and spaced apart around the cylinder 310 on the tower base 610. The at least two pull plates 340 are respectively connected to the cylinder 310 and can support the first end of the movable rod 320 within the cylinder 310 to be oriented upwards. That is, by fixing at least two pull plates 340 to the tower base 610, the cylinder 310 can be installed on the tower base 610. Furthermore, by supporting the first end of the movable rod 320 to be oriented upwards, the stability and reliability of the tensioning movement can be ensured. Specifically, the number of pull plates 340 can be two, with the two pull plates 340 respectively located on opposite sides of the cylinder 310. The lower ends of the two pull plates 340 are located on the tower base 610, and their upper ends are detachably connected to the cylinder 310.

[0095] In this embodiment, the pull plate body 340 is equipped with a force sensor 341, part of the force control assembly, for detecting the tension force of the tie rod tensioning mechanism. The addition of the force sensor 341 facilitates real-time detection of the tension force on the tie rod assembly 10 during tower crane operation, ensuring the safety of the tower crane. Specifically, since the locking nut 330 is tightened to abut against the cylinder body 310, and the pull plate body 340 is connected to the cylinder body 310, the pull plate body 340 also shares the tension force borne by the tie rod assembly 10. Therefore, adding the force sensor 341 to the pull plate body 340 allows for the detection of the tension force. More specifically, the pull plate body 340 includes an upper plate and a lower plate arranged sequentially from top to bottom. The lower end of the lower plate is mounted on the tower base 610. The upper and lower plates are connected by a pull plate sensor, which is configured as a force sensor 341. The upper end of the upper plate is connected to the cylinder 310 and can cooperate with other pull plate bodies 340 to support the cylinder 310. Of course, this application is not limited to this. The force sensor 341 can also be configured as a pin sensor, and the pull plate body 340 and the cylinder 310 can be connected in series by the pin sensor. In addition, the force sensor 341 is not limited to being mounted on the pull plate body 340, but can also be mounted on the pull rod assembly 10, for example, between two adjacent pull rod units 100, or between the pull rod assembly 10 and the support arm 400.

[0096] It should be noted that the force application process of the tie rod assembly 10 in this application is divided into three steps: First step: pre-tightening stage, the first end of the moving rod 320 retracts to tighten the tie plate assembly; Second step: after the pre-tightening force of the telescopic cylinder is reached, the locking nut 330 is adjusted so that the locking nut 330 is tightened to abut against the cylinder body 310; Third step: when the tower crane is working, due to the deformation of the tower body, an additional tension will be generated on the tie plate assembly, and the tension at this time can be detected by the force sensor 341.

[0097] In this embodiment, at least two ear plates 311 are sequentially spaced along the circumferential direction on the outer side of the cylinder body 310. Each of the at least two ear plates 311 is detachably connected to at least two pull plates 340 via cylinder body 310 connectors. Adding ear plates 311 to the outer side of the cylinder body 310 facilitates detachable connection with the pull plates 340. Specifically, both the upper end of the pull plates 340 and the ear plates 311 have connection holes. The ear plates 311 of the cylinder body 310 can be placed on one side of the upper end of the pull plates 340, with their connection holes aligned. The cylinder body 310 connectors are then sequentially passed through these connection holes for secure connection. The cylinder body 310 connectors can be configured as bolts and nuts. More specifically, the upper end of the pull plate body 340 (upper plate body) can be formed with two bifurcated plates that are relatively spaced apart, and each bifurcated plate has a connecting hole. The ear plate 311 can be placed between the two bifurcated plates, and the ear plate 311 and the two bifurcated plates can be connected in series through the cylinder body 310 connector to realize the clamping connection between the upper end of the pull plate body 340 and the ear plate 311.

[0098] In this embodiment, the inner peripheral wall of the cylinder 310 is formed with a stepped surface 312 facing the external threaded rod 321, and the piston body on the movable rod 320 faces the stepped surface 312 and is movably disposed in the inner cavity of the cylinder 310. That is, the stepped surface 312 blocks the piston body in the inner cavity of the cylinder 310, and since the stepped surface 312 is facing the external threaded rod 321, the maximum extension length of the first end of the movable rod 320 is limited, so that the oil inlet can be arranged circumferentially in the cylinder 310 without opening an oil inlet at the end, thus ensuring the reliability of the end seal. Specifically, the inner cavity of the cylinder body 310 can be divided by the stepped surface 312. The inner cavity above the stepped surface 312 is the small cavity, and the inner cavity below the stepped surface 312 is the large cavity. The cylinder body 310 above the stepped surface 312 has a small cavity oil inlet, and the cylinder body 310 below the stepped surface 312 and near the lower end has a large cavity oil inlet. When the telescopic drive 300 is controlled to tension and pull the tie rod assembly 10, the small cavity oil inlet can be controlled to allow oil to enter, so that the moving rod 320 moves downward.

[0099] As shown in Figures 8 to 16, in this embodiment of the application, the pull rod assembly 10 includes pull rod units 100, and the number of pull rod units 100 is at least two. The at least two pull rod units 100 are sequentially and movably connected to each other, so that the pull rod assembly 10 can switch between an extended state and a retracted state. By setting the pull rod assembly 10 to be composed of at least two pull rod units 100 sequentially and movably connected, the pull rod assembly 10 has an extended state and a retracted state. The pull rod assembly 10 can be in the extended state during tensioning and support assembly operations, and the pull rod assembly 10 can be switched from the extended state to the retracted state before assembly and after disassembly, so as to reduce the length of the pull rod assembly 10, thereby facilitating storage and transportation.

[0100] In the first and second embodiments of this application, at least two pull rod units 100 are arranged sequentially along the length direction, and any two adjacent pull rod units 100 are connected by a flip connection structure 200, so that the at least two pull rod units 100 can be flipped sequentially and can switch between an extended state and a folded state. The at least two pull rod units 100 are arranged horizontally when in the folded state. The addition of the flip connection structure 200 allows the pull rod assembly 10 to be folded, which not only facilitates assembly but also enables rapid state switching.

[0101] Specifically, when tensioning support is needed between the upper section of the tower body 600 and the tower base 610, the tie rod assembly 10 can be switched to the extended state. The extended state means that each tie rod unit 100 in the tie rod assembly 10 is flipped to the rear of the previous tie rod unit 100. At this time, the tie rod assembly 10 is at its maximum length. When the tie rod assembly 10 needs to be stored, the tie rod assembly 10 can be switched to the folded state. The folded state means that each tie rod unit 100 in the tie rod assembly 10 is folded and flipped to be placed parallel to the previous tie rod unit 100. Specifically, each tie rod unit 100 can be placed horizontally. At this time, the tie rod assembly 10 is at its minimum length, which makes it easier to store and transport the tie rod assembly 10 before assembly and after disassembly.

[0102] Furthermore, at least two pull rod units 100 can be horizontally positioned when folded, which improves the stability of the pull rod assembly 10 during transportation. Additionally, there can be multiple pull rod units 100, all connected sequentially via a flip-connecting structure 200; the number of pull rod units 100 can be set according to specific requirements.

[0103] Referring to Figures 8 to 11, in the first embodiment of this application, the flip connection structure 200 can be configured as a connecting unit 210. The connecting unit 210 has a first hinge portion and a second hinge portion at both ends. Two adjacent pull rod units 100 are respectively hinged to the first hinge portion and the second hinge portion. At least two pull rod units 100 can be arranged horizontally along the height direction in a folded state. By configuring the connecting unit 210, not only is the folding and retraction of the pull rod assembly 10 achieved, but the flip hinge points of two adjacent pull rod units 100 can also be separated, making the folding and flipping smoother and more flexible. Specifically, both ends of the pull rod unit 100 can have a first hinge hole 114, and both the first hinge portion and the second hinge portion can have a second hinge hole 216. The pull rod unit 100 is hinged to the connecting unit 210 through a hinge shaft passing through the first hinge hole 114 and the second hinge hole 216. Furthermore, when the pull rod assembly 10 is in a folded state, the connecting unit 210 connecting the two adjacent pull rod units 100 is arranged vertically.

[0104] In the first embodiment of this application, the connecting unit 210 includes a first connecting plate 211 and a second connecting plate 212. The first connecting plate 211 and the second connecting plate 212 are spaced apart and connected. The first end of the first connecting plate 211 and the second connecting plate 212 is set as a first hinge portion and forms a first clamping space 214. The second end of the first connecting plate 211 and the second connecting plate 212 is set as a second hinge portion and forms a second clamping space 215. Both the first clamping space 214 and the second clamping space 215 can be inserted into the pull rod unit 100, so that the pull rod unit 100 and the connecting unit 210 are connected in series and movably hinged through the hinge shaft. That is, the connecting unit 210 can clamp and connect the pull rod unit 100, which improves the connection strength and stability, and resists lateral loads. Furthermore, the first connecting plate 211 and the second connecting plate 212 are fixedly connected in the middle area (that is, the area between the first hinge part and the second hinge part). The first end of the first connecting plate 211 and the second connecting plate 212, as well as the second end of the first connecting plate 211 and the second connecting plate 212, can be provided with a second hinge hole 216. After the end of the pull rod unit 100 extends into the clamping space, the first hinge hole 114 on the pull rod unit 100 can communicate with the second hinge hole 216 on the first connecting plate and the second connecting plate 212. The hinge shaft passes through all the communicating first hinge holes 114 and second hinge holes 216 in sequence to connect the pull rod unit 100 and the connecting unit 210 in series and realize the movable hinge.

[0105] In the first embodiment of this application, the pull rod unit 100 includes two first pull rod plates 110, which are arranged relatively apart and connected. The connecting unit 210 also includes a third connecting plate 213. The first connecting plate 211, the second connecting plate 212, and the third connecting plate 213 are arranged relatively apart and connected in sequence. The first ends of the first connecting plate 211, the second connecting plate 212, and the third connecting plate 213 are set as first hinge parts and form two first clamping spaces 214. The second ends of the first connecting plate 211, the second connecting plate 212, and the third connecting plate 213 are set as second hinge parts and form two second clamping spaces 215. The two first clamping spaces 214 and the two second clamping spaces 215 can be inserted into the two first pull rod plates 110 one by one. The tie rod unit 100 can be configured as a double-plate structure, and the double-plate structure obviously enhances the tie rod unit 100. In addition, in order to further realize the clamping of the double-plate tie rod unit 100, the connecting unit 210 can be configured as a three-plate structure, with the two first tie rod plates 110 in the tie rod unit 100 clamped in different clamping spaces respectively, thereby improving the stability of the flipping motion.

[0106] Specifically, the first ends of the two first tie rod plates 110 and the second ends of the two first tie rod plates 110 are provided with first hinge holes 114. The first ends of the first connecting plate 211, the second connecting plate 212 and the third connecting plate 213, and the second ends of the first connecting plate 211, the second connecting plate 212 and the third connecting plate 213 are provided with second hinge holes 216. After the ends of the two first tie rod plates 110 of the tie rod unit 100 are inserted into the two clamping spaces provided at the same end, the first hinge holes 114 on the two first tie rod plates 110 can communicate with the second hinge holes 216 on the first connecting plate, the second connecting plate 212 and the third connecting plate 213. The hinge shaft passes through all the communicating first hinge holes 114 and second hinge holes 216 in sequence to connect the tie rod unit 100 and the connecting unit 210 in series and realize the movable hinge.

[0107] In the first embodiment of this application, the pull rod unit 100 further includes a first positioning block 111, a second positioning block 112, and a block connector 113. Both the first positioning block 111 and the second positioning block 112 have two spaced-apart positioning slots. The two positioning slots of the first positioning block 111 can be correspondingly engaged with the first long sides of the two first pull rod plates 110 of the pull rod unit 100. The two positioning slots of the second positioning block 112 can be correspondingly engaged with the second long sides of the two first pull rod plates 110 of the pull rod unit 100. The first positioning block 111 and the second positioning block 112 are detachably connected via the block connector 113. That is, the two first pull rod plates 110 of the pull rod unit 100 are detachably connected to facilitate disassembly and replacement. The first positioning block 111 and the second positioning block 112 not only facilitate the positioning of the two first pull rod plates 110 before detachable connection, but also facilitate the adjustment of the position of the first pull rod plates 110. It should be noted that the first long side and the second long side of the two first pull rod plates 110 refer to the two sides of the two first pull rod plates 110 that are arranged opposite each other along the length direction.

[0108] Specifically, the width of the solid portion between the two positioning slots of the first positioning block 111 and the two positioning slots of the second positioning block 112 can be equal to the distance between the two first pull rod plates 110. This allows the two first pull rod plates 110 to stably clamp the positioning blocks. Furthermore, the solid portion between the two positioning slots can have a connecting hole for the block connector 113 to pass through. More specifically, the block connector 113 can be a threaded fastener, such as a bolt with a locking nut 330. However, this application is not limited to this; it can also be a rivet or a pin, or other suitable fastener. In addition, the positioning block group on a single pull rod 100 can be, but not limited to, one, and can specifically be at least two.

[0109] In the first embodiment of this application, the inner periphery of the first pull rod plate 110 is chamfered. The chamfered structure facilitates the guidance of the installation of the positioning block and the connecting unit 210. It should be noted that the inner side of the pull rod plate is relative to the gap between the two pull rod plates; the side facing the gap is the inner side, and the side away from the gap is the outer side.

[0110] In the first embodiment of this application, the connecting unit 210 further includes a connecting fastener 217 and a sleeve 218. The sleeve 218 is placed between the first connecting plate 211 and the second connecting plate 212. The connecting fastener 217 is sequentially passed through the first connecting plate 211, the sleeve 218, and the second connecting plate 212 for fastening. That is, the connecting unit 210 is designed to be detachable, and the addition of the sleeve 218 ensures that the distance between two adjacent connecting plates allows for clamping of the first pull rod plate 110. Specifically, when the connecting unit 210 is configured as a three-plate structure, the first connecting plate 211, the second connecting plate 212, and the third connecting plate 213 are all provided with through mounting holes. A sleeve 218 communicating with the mounting holes is provided between the first connecting plate 211 and the second connecting plate 212, and a sleeve 218 communicating with the mounting holes is provided between the second connecting plate 212 and the third connecting plate 213. The connecting fastener 217 passes through all the mounting holes and the sleeve 218 in sequence and is then tightened. More specifically, the connecting fastener 217 can be a threaded fastener, such as a bolt with a lock nut 330. However, this application is not limited to this; it can also be a rivet or a pin, or other suitable fastener.

[0111] In the first embodiment of this application, the length ratio of the pull rod unit 100 to the connecting unit 210 can be set to 30 to 50, thereby ensuring that the number of connecting units 210 is minimized, so as to reduce manufacturing costs. Preferably, the length ratio can be 40.

[0112] Referring to Figures 12 to 14, in the second embodiment of this application, the flip-connecting structure 200 can also be configured as a pin structure 220. At least two pull rod units 100 each form a folding accommodating space 122. The end of each subsequent pull rod unit 100 can extend into the folding accommodating space 122 of the preceding pull rod unit 100 and be movably hinged through the pin structure 220. Furthermore, when the subsequent pull rod unit 100 is in the folded and retracted state, it is horizontally placed within the folding accommodating space 122 of the preceding pull rod unit 100. It should be noted that in this embodiment, all pull rod units 100 have the same structure, but the frame size needs to be set to decrease sequentially so that each subsequent pull rod unit 100 can always be flipped and folded into the folding accommodating space 122 of the preceding pull rod unit 100. After all pull rod units 100 are flipped and folded into storage, the overall outline size of the entire pull rod assembly 10 is consistent with the overall outline size of the first pull rod unit 100, thereby further reducing the storage size of the pull rod assembly 10.

[0113] In the second embodiment of this application, the pin structure 220 can be configured such that two interconnected tie rod units 100 each have pin holes that can be connected to each other, and the pin connectors are connected in series through all the interconnected pin holes to achieve a movable hinge. Alternatively, one of the two interconnected tie rod units 100 may have a shaft mounting part, and the other tie rod unit 100 may have a pin hole that can be fitted onto the shaft mounting part.

[0114] In the second embodiment of this application, the tie rod unit 100 includes a connecting plate 121 and two second tie rod plates 120. The two second tie rod plates 120 are arranged at intervals relative to each other. The connecting plate 121 connects the two second tie rod plates 120 to enclose and form a folding accommodating space 122. The ends of the two second tie rod plates 120 are provided with pin holes for the pin structure 220 to pass through. Specifically, the connecting plate 121 is located on one side of the two second pull rod plates 120 to form the bottom side of the folding accommodating space 122. When the latter pull rod unit 100 is flipped and folded into the folding accommodating space 122 of the former pull rod unit 100, the connecting plate 121 can provide bottom support for the latter pull rod unit 100. Since the connecting plate 121 restricts the flipping and folding direction of the latter pull rod unit 100, the latter pull rod unit 100 can only be folded and folded into storage on the side without the connecting plate 121. It is not limited to all pull rod units 100 having the connecting plate 121. Preferably, the first pull rod unit 100 has the connecting plate 121, and the number of connecting plates 121 on a pull rod unit 100 is not limited to one.

[0115] Specifically, the lower end of the tie rod assembly 10 provided in this application can be connected to the rod end of the piston rod of the tensioning cylinder facing upward, and the upper end can be connected to the support arm 400 installed on the upper part of the tower body to achieve tension support for the tower body.

[0116] In summary, in the first and second embodiments of the pull rod assembly 10 provided in this application, the pull rod assembly 10 can be designed as a foldable and collapsible structure, which has the advantages of simple assembly and manufacturing, and high transportation and transfer efficiency. Furthermore, in the first embodiment, the pull rod unit 100 adopts a double plate structure and the connecting unit 210 adopts a three plate structure, which can play a role in resisting lateral loads.

[0117] Referring to Figures 15 and 16, in the third embodiment of this application, at least two pull rod units 100 are each configured as telescopic sleeve units 130, and are sequentially and telescopically fitted together from the inside out, so that the pull rod assembly 10 can switch between an extended state and a retracted state. Alternatively, the pull rod assembly 10 can be configured as a multi-layered telescopic sleeve, and the switching between the extended state and the retracted state of the pull rod assembly 10 can be achieved through the telescopic movement of the telescopic sleeve units 130. When the pull rod assembly 10 is in the retracted state, all the telescopic sleeve units 130 in the pull rod assembly 10 can be housed within the outermost telescopic sleeve unit 130, thereby ensuring the reliability and stability of the retracted state.

[0118] Specifically, when tensioning support is needed between the upper section of the tower body 600 and the tower base 610, the tie rod assembly 10 can be switched to the extended state. The extended state means that each telescopic cylinder unit 130 in the tie rod assembly 10 is pulled out from the previous telescopic cylinder unit 130. At this time, the tie rod assembly 10 is at its maximum length. When the tie rod assembly 10 needs to be stored, the tie rod assembly 10 can be switched to the retracted state. The retracted state means that each telescopic cylinder unit 130 in the tie rod assembly 10 is retracted into the outermost telescopic cylinder unit 130. At this time, the tie rod assembly 10 is at its minimum length, which makes it easier to store and transport the tie rod assembly 10 before assembly and after disassembly.

[0119] Furthermore, the inner end of the telescopic cylinder unit 130 is provided with a first connector 131 protruding from the outer peripheral wall. The first connector 131 is always placed inside the outer telescopic cylinder unit 130 and can abut against the outer telescopic cylinder unit 130 after its own cylinder unit extends into place, so as to prevent it from falling out. The outer end of the telescopic cylinder unit 130 is provided with a second connector 132 protruding from the inner peripheral wall. The second connector 132 is configured to form an abutment stop against the first connector 131 located on the inner telescopic cylinder unit 130.

[0120] Referring to Figures 1, 2, and 17, in this embodiment, the self-supporting tower body device further includes an auxiliary hoisting mechanism 500 mounted on the counterweight boom 800 for hoisting the support boom 400. The slewing radius of the hoisting hook in the auxiliary hoisting mechanism 500 on the tower body is set to be no less than the distance between the hoisting center of gravity of the support boom 400 and the tower body 600. It is understandable that directly using the main hook on the tower crane to install the support boom 400 would be very difficult in practice. Because the luffing jib tower crane is limited by a minimum radius, after hoisting to the limit position, the support boom 400 cannot be fully in place and will still be some distance from the edge of the tower body 600. This distance is very difficult to bridge manually and is extremely unsafe. Therefore, by adding an auxiliary hoisting mechanism 500 on the counterweight boom 800 of the tower crane, the efficiency and safety of the support boom 400 installation can be improved.

[0121] Specifically, the auxiliary hoisting mechanism 500 includes a lifting cantilever beam 510, a winding and unwinding drive assembly 520, and a lifting hook assembly 530. The lifting cantilever beam 510 can be located below the counterweight arm 800 and extends in the width direction of the counterweight arm 800, that is, the length direction of the lifting cantilever beam 510 is perpendicular to the length direction of the counterweight arm 800. The winding and unwinding drive assembly 520 and the lifting hook assembly 530 are sequentially spaced on the lifting cantilever beam 510 along its extension direction. Specifically, the winding and unwinding drive assembly 520 is located directly below the counterweight arm 800, and the lifting hook assembly 530 can be located where the lifting cantilever beam 510 extends out of the counterweight arm 800. The winding and unwinding drive assembly 520 can switch between unwinding and rewinding the lifting hook assembly 530 so that the lifting hook in the lifting hook assembly 530 can hoist the support arm 400 to the installation position. In addition, the axis of the lifting hook assembly 530 is parallel to the rotation axis of the counterweight boom 800, the extension direction of the lifting cantilever beam 510 is perpendicular to the rotation axis of the counterweight boom 800, and the rotation radius of the lifting hook on the tower body 600 is set to be no less than the distance between the lifting center of gravity of the support boom 400 and the tower body 600, thereby avoiding the phenomenon of the support boom 400 hitting the tower body during the lifting process.

[0122] Furthermore, the winding and unwinding drive assembly 520 includes a winding and unwinding drive motor mounted on the lifting cantilever beam 510 and a winding and unwinding drum driven and connected to the winding and unwinding drive motor. The lifting hook assembly 530 includes a fixed pulley block, a hook pulley block, a lifting hook body, and a lifting rope. The fixed pulley block is mounted on the lifting cantilever beam 510, and the movable pulley block is mounted on the lifting hook body. One end of the lifting rope is wound around the winding and unwinding drum, and the other end passes sequentially around the upper end of the fixed pulley block and the lower end of the movable pulley block and is fixedly connected to the lifting cantilever beam.

[0123] Furthermore, this application also provides a tower crane, wherein the tower crane includes the self-supporting tower body device according to the above-described embodiments. Since the tower crane adopts all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0124] In addition, as shown in Figure 18, this application provides a method for self-supporting a tower body, wherein the method for self-supporting a tower body includes:

[0125] Step S100: Install the support arm 400 to the preset height position;

[0126] Step S200: Connect the two ends of the pull rod assembly 10 to the drive end of the telescopic drive component 300 and the support arm 400 respectively.

[0127] Step S300: Control the telescopic drive component 300 to stretch the tie rod assembly 10 with a preset pre-tightening force;

[0128] Step S400: Detect the tension force while the tower crane is in operation;

[0129] Step S500: If the detected tension force exceeds the safety threshold range, an over-limit command is generated.

[0130] That is, the self-supporting tower body method provided in this application can be applied to the above-mentioned self-supporting tower body device. When the tower crane is in operation, the tension force of the tie rod tensioning mechanism is detected, and an over-limit command is generated when the detected data exceeds the safety threshold range, so as to prompt the corresponding processing, avoid the phenomenon of excessive stress in the tie rod assembly 10, and improve the safety of the entire tower crane operation.

[0131] Specifically, the tension force of the tie rod tensioning mechanism can be detected by adding a force measurement control component.

[0132] In this embodiment, the cylinder 310 of the telescopic drive 300 is provided with a movable rod 320, and both ends of the movable rod 320 extend out of the cylinder 310. The first end of the movable rod 320 facing upward is connected to the pull rod assembly 10, and the second end facing downward is fitted with a screw-on locking nut 330. Step S300, controlling the telescopic drive 300 to stretch the pull rod assembly 10 with a preset pre-tension force, includes:

[0133] Control telescopic drive component 300; tension rod assembly 10;

[0134] When the tension force applied to the tie rod assembly 10 by the telescopic drive 300 reaches the preset preload, adjust the locking nut 330 so that the locking nut 330 is tightened to abut against the cylinder body 310.

[0135] Understandably, by extending the movable rod 320 in both directions within the cylinder body 310 and providing a tightenable locking nut 330 at the end opposite to the tie rod assembly 10, after the tension force applied to the tie rod assembly 10 by the telescopic drive 300 reaches the pre-tension force, the locking nut 330 can be adjusted to abut against the cylinder body 310. This ensures a stable pre-tension force while also distributing the tension force on the movable rod 320 to the cylinder body 310, thereby significantly reducing the size of the hydraulic cylinder and achieving cost reduction.

[0136] In this embodiment of the application, step S100, before installing the support arm 400 to the preset height position, includes:

[0137] Determine the installation height and length of the support arm 400.

[0138] Specifically, the installation height and length of the support arm 400 can be determined according to the aforementioned calculation formulas. More specifically, the installation height H of the support arm 400 on the tower body is (0.5~0.6)H0, where H0 is the total height of the tower body. Meanwhile, the calculation formula for the length L0 of the support arm 400 is: L0 + L / 2 = K / (3~5), where K is the distance between the two diagonally positioned telescopic drive members 300, and L is the diagonal center distance of the tower body.

[0139] In this embodiment of the application, step S100, installing the support arm 400 to a preset height position, includes:

[0140] An auxiliary lifting mechanism 500 is installed on the counterweight boom 800, wherein the slewing radius of the lifting hook in the auxiliary lifting mechanism 500 on the tower body is set to be no less than the distance between the lifting center of gravity of the support boom 400 and the tower body.

[0141] The auxiliary hoisting mechanism 500 is used to hoist the support arm 400 to the preset height position, and the support arm 400 and the tower body are connected.

[0142] Understandably, it would be very difficult to install the support boom 400 directly using the main hook on the tower crane in practice, because the luffing jib tower crane is limited by the minimum amplitude. After being hoisted to the limit position, the support boom 400 cannot be fully in place and will still be some distance from the edge of the tower body 600. Therefore, by adding an auxiliary hoisting mechanism 500 on the counterweight boom 800 of the tower crane, the efficiency and safety of the installation of the support boom 400 can be improved.

[0143] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A self-bracing tower section wherein, The tower body self-supporting device comprises: a support arm (400) arranged on the tower body (600); a tension rod tensioning mechanism comprising a telescopic driving member (300) and a tension rod assembly (10), the telescopic driving member (300) being arranged on the tower body base (610) and having an upwardly arranged driving end, and the two ends of the tension rod assembly (10) being connected to the driving end of the telescopic driving member (300) and the support arm (400) respectively in one-to-one correspondence; a force measurement control assembly for detecting the tensioning tension of the tension rod tensioning mechanism and generating an overrun instruction if the detection data exceeds a safety threshold range.

2. The tower self-bracing apparatus of claim 1, wherein, The force measurement control assembly comprises a controller and a force sensor (341) for detecting the tensioning tension of the tension rod tensioning mechanism, and the controller is communicatively connected to the force sensor (341) and the telescopic driving member (300) respectively and is configured to: receive the detection data of the force sensor (341); generate an overrun instruction if the detection data exceeds the safety threshold range; control the telescopic driving member (300) according to the overrun instruction so that the detection data of the force sensor (341) falls within the safety threshold range.

3. The tower self-bracing apparatus of claim 1, wherein, The force measurement control assembly comprises a controller, a force sensor (341) and an alarm, the force sensor (341) is used for detecting the tensioning tension of the tension rod tensioning mechanism, and the controller is communicatively connected to the force sensor (341) and the alarm respectively and is configured to: receive the detection data of the force sensor (341); generate an overrun instruction if the detection data exceeds the safety threshold range; control the alarm to issue an alarm according to the overrun instruction.

4. The tower self-bracing apparatus of claim 1, wherein, The installation height H of the support arm (400) on the tower body (600) is (0.5-0.6)H0, wherein H0 is the total height of the tower body; and / or, the length L0 of the support arm (400) is calculated according to the formula: L0+L / 2=K / (3-5), wherein K is the distance between the two telescopic driving members (300) arranged diagonally, and L is the diagonal center distance of the tower body.

5. The tower self-bracing apparatus of claim 1, wherein, The support arm (400) is detachably mounted on the main chord (620) of the tower body standard section and extends in the diagonal direction of the tower body standard section, and the height dimension of the support arm (400) is arranged in a tapered manner in the extension direction outward from the main chord (620), so that the inner end of the support arm (400) can be provided with at least two first connecting portions (450) detachably connected with the main chord (620), and the outer end of the support arm (400) can be provided with at least one second connecting portion (460) connected with the tension rod assembly (10).

6. The tower self-bracing apparatus of claim 5, wherein, The support arm (400) comprises an upper connecting beam (410), a lower connecting beam (420) and a belly connecting structure, the upper connecting beam (410) and the lower connecting beam (420) are sequentially and spacedly arranged from top to bottom and are both arranged to extend outward from the main chord (620), and the upper connecting beam (410) and the lower connecting beam (420) are arranged to gradually approach in the extending direction outward from the main chord (620), the belly connecting structure connects the upper connecting beam (410) and the lower connecting beam (420), and the inner end of the upper connecting beam (410) and the inner end of the lower connecting beam (420) both have the first connecting part (450).

7. The tower self-bracing apparatus of claim 1, wherein, The telescopic driving member (300) comprises a cylinder body (310), a moving rod member (320) and a locking nut (330), the cylinder body (310) is arranged on the tower body base (610), the moving rod member (320) is movably arranged in the cylinder body (310) and both ends thereof are arranged to extend out of the cylinder body (310), the first end of the moving rod member (320) arranged upward is provided as the driving end, the second end of the moving rod member (320) arranged downward is provided as an outer threaded rod body (321), and the locking nut (330) is sleeved on the outer threaded rod body (321) and can be tightened to abut against the cylinder body (310).

8. The tower self-bracing apparatus of claim 7, wherein, The pull rod tensioning mechanism further comprises at least two pull plate bodies (340) which are sequentially and spacedly arranged on the tower body base (610) around the cylinder body (310), at least two pull plate bodies (340) are respectively connected with the cylinder body (310) and can support the first end of the moving rod member (320) in the cylinder body (310) arranged upward, and the pull plate body (340) is provided with a force sensor (341) in the force control assembly for detecting the tensioning tension of the pull rod tensioning mechanism.

9. The tower leg self- supporting device of any one of claims 1 to 8, wherein, The pull rod assembly (10) comprises pull rod monomers (100), the number of the pull rod monomers (100) is at least two, and at least two pull rod monomers (100) are sequentially and movably connected, so that the pull rod assembly (10) can be switched between an elongated state and a folded state.

10. The tower self-bracing apparatus of claim 9, wherein, At least two pull rod monomers (100) are sequentially arranged along the length direction, and any two adjacent pull rod monomers (100) are connected through a connecting monomer (210), two ends of the connecting monomer (210) are respectively provided with a first hinge part and a second hinge part, and two adjacent pull rod monomers (100) are movably hinged with the first hinge part and the second hinge part one by one, so that at least two pull rod monomers (100) can be sequentially flipped and switched between an unfolded elongated state and a folded state, and at least two pull rod monomers (100) can be sequentially and horizontally placed along the height direction in the folded state. Or, at least two of the pull rod monomers (100) are sequentially arranged along the length direction, and any two adjacent pull rod monomers (100) are connected by a pin shaft structure (220). At least two of the pull rod monomers (100) are formed with a folding accommodation space (122), and the end of the latter pull rod monomer (100) can be inserted into the folding accommodation space (122) of the former pull rod monomer (100) and is movably hinged by the pin shaft structure (220), so that at least two of the pull rod monomers (100) can be sequentially flipped and switched between an unfolded elongated state and a folded state. The latter pull rod monomer (100) can be horizontally placed in the folding accommodation space (122) of the former pull rod monomer (100) when in the folded state. Or, at least two of the pull rod monomers (100) are telescopic cylinder monomers (130) and are sequentially and telescopically sleeved from inside to outside, so that the pull rod assembly (10) can be switched between a pulled-out elongated state and a retracted state.

11. The tower leg self- supporting device according to any one of claims 1 to 8, wherein, The tower self-supporting device further comprises an auxiliary lifting mechanism (500) arranged on the balance arm (800) and used for lifting the support arm (400), and the rotation radius of the lifting hook in the auxiliary lifting mechanism (500) on the tower body is not less than the distance between the lifting center of gravity of the support arm (400) and the tower body.

12. A tower crane, wherein, The tower crane comprises the tower self-supporting device according to any one of claims 1 to 11.

13. A method of self-supporting a tower shaft, wherein The tower self-supporting method comprises: installing the support arm (400) to a preset height position; connecting both ends of the pull rod assembly (10) with the driving ends of the telescopic driving member (300) and the support arm (400) one by one; controlling the telescopic driving member (300) to stretch the pull rod assembly (10) at a preset pretightening tension; detecting the tensioning tension when the tower crane is in a working state; generating an out-of-limit instruction when the detection data of the tensioning tension exceeds a safety threshold range.

14. The method of self-supporting a tower shaft according to claim 13, wherein, The cylinder body (310) of the telescopic driving member (300) is provided with a moving rod (320), both ends of the moving rod (320) extend out of the cylinder body (310), the first end of the moving rod (320) arranged upward is connected with the pull rod assembly (10), and the second end arranged downward is sleeved with a rotatable locking nut (330). The control of the telescopic driving member (300) to stretch the pull rod assembly (10) at a preset pretightening tension comprises: controlling the telescopic driving member (300) to stretch the pull rod assembly (10); adjusting the locking nut (330) when the tensioning tension applied by the telescopic driving member (300) to the pull rod assembly (10) reaches the preset pretightening tension, so that the locking nut (330) is tightened to abut against the cylinder body (310).

15. The method of self-supporting a tower shaft according to claim 13, wherein, Before the step of installing the support arm (400) to a preset height position, the method further comprises: determining the installation height and length of the support arm (400); And / or, the mounting of the support arm (400) to the preset height position comprises: Mounting the auxiliary hoisting mechanism (500) on the balance arm (800), wherein the rotary radius of the lifting hook in the auxiliary hoisting mechanism (500) on the tower body (600) is not less than the distance between the hoisting gravity center of the support arm (400) and the tower body (600); Hoisting the support arm (400) to the preset height position by using the auxiliary hoisting mechanism (500), and connecting the support arm (400) and the tower body (600).

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