Tower crane base leveling device and method

Abstract

This application discloses a tower crane base leveling device and method. The tower crane base leveling device includes a levelness detection mechanism for detecting the real-time inclination angle of the tower crane base relative to a horizontal plane; a lifting and adjusting mechanism, located at each corner of the bottom of the tower crane base and used to lift and adjust the level of the tower crane base; and a control mechanism, connecting the levelness detection mechanism and the lifting and adjusting mechanism and controlling the movement of the lifting and adjusting mechanism at corresponding positions based on the real-time inclination angle to maintain the tower crane base level. The tower crane base leveling device and method provided in this application can detect and ensure the levelness of the tower crane base in real time within a safe range, eliminating safety accidents.

Description

Technical Field

[0001] The present application relates to the field of engineering machinery, and in particular to a tower crane base leveling device and method. Background Art

[0002] Large wind turbine tower cranes typically weigh hundreds of tons, with their entire weight transmitted from the baseplate to the ground. As the foundation of the entire wind turbine, the baseplate must remain level at all times. Failure to do so will cause the entire tower, which can reach over a hundred meters in height, to tilt, potentially leading to a safety hazard. Leveling the baseplate is typically manually monitored and adjusted using hydraulic cylinders or mechanical screws to ensure it remains within the permitted tilt range. Failure to maintain the baseplate within the permitted tilt range can easily lead to safety accidents. Summary of the Invention

[0003] The purpose of this application is to provide a tower crane base leveling device that can detect and ensure the horizontality of the tower crane base in real time within a safe range to prevent safety accidents. Another purpose of this application is to provide a tower crane base leveling method using the tower crane base leveling device.

[0004] To achieve the above objectives, the present application provides a tower crane base leveling device, comprising:

[0005] Level detection mechanism, used to detect the real-time inclination angle of the tower crane base relative to the horizontal plane;

[0006] The lifting and adjusting mechanism is located at each corner of the bottom of the tower crane base and is used to lift and adjust the horizontality of the tower crane base;

[0007] The control mechanism is connected to the level detection mechanism and the lifting and adjusting mechanism and controls the lifting and adjusting mechanism at the corresponding position according to the real-time inclination angle to maintain the tower crane base to be level.

[0008] In some embodiments, the lifting and adjusting mechanism includes a hydraulic lifting cylinder, which is provided with a mechanical locking mechanism. The mechanical locking mechanism includes a driving assembly connected to the control mechanism. The control mechanism is used to control the driving assembly to switch the mechanical locking mechanism to a preset state after the hydraulic lifting cylinder is adjusted into position to maintain the cylinder barrel and piston rod of the hydraulic lifting cylinder locked.

[0009] In some embodiments, the top of the piston rod is provided with an external thread section, and the mechanical locking mechanism includes:

[0010] a displacement sensor, for detecting a movement distance of the piston rod relative to the cylinder, the displacement sensor being connected to the control mechanism;

[0011] a driving gear connected to the driving assembly;

[0012] A locking nut is sleeved on the external thread section, and an outer wall of the locking nut is provided with helical teeth that cooperate with the driving gear;

[0013] The control mechanism is used to adjust the driving assembly according to the movement distance to drive the locking nut to move relative to the piston rod, so that the locking nut fits into the cylinder barrel to lock the hydraulic jacking cylinder.

[0014] In some embodiments, the locking mechanism comprises:

[0015] A crossbeam, vertically fixed to the piston rod;

[0016] Racks, a pair of racks are respectively fixed to the two ends of the beam, and the racks are arranged parallel to the piston rod;

[0017] a gear connected to the drive assembly and meshing with the rack;

[0018] The control mechanism is used to control the driving assembly to stop after the horizontality of the tower crane base is adjusted to the correct level.

[0019] In some embodiments, a base plate is provided at the bottom of any of the hydraulic jacking cylinders.

[0020] In some embodiments, it further includes a straight beam connecting the tower crane base, wherein the straight beams are cross-arranged in multiple groups and extend to the periphery of the tower crane base, and the lifting and lowering adjustment mechanisms are respectively arranged at both ends of the straight beams.

[0021] In some embodiments, a pressure sensor is provided between any of the lifting and adjusting mechanisms and the tower crane base, and all of the pressure sensors are connected to the control mechanism, which is used to control the action of the lifting and adjusting mechanism according to the pressure value of the pressure sensor.

[0022] The present application also provides a tower crane base leveling method, which uses any of the above-mentioned tower crane base leveling devices, comprising:

[0023] Automatically monitor and obtain the real-time inclination angle of the tower crane base relative to the horizontal plane at any time;

[0024] When the real-time inclination angle exceeds the set inclination angle, the lifting and adjusting mechanism is controlled to lift and adjust the height of each top angle of the tower crane base to maintain the tower crane base level;

[0025] Wherein, the lifting and lowering adjustment mechanism is arranged at each top corner of the tower crane base.

[0026] In some embodiments, the method further includes locking the lifting adjustment mechanism after the lifting adjustment mechanism is adjusted to maintain the tower crane base level.

[0027] In some embodiments, before the step of “controlling the lifting adjustment mechanism to lift and adjust the height of each top corner of the tower crane base to maintain the tower crane base level when the real-time inclination angle exceeds the set inclination angle”, the step further includes:

[0028] The acting force between any of the lifting and adjusting mechanisms and the tower crane base is detected, and the corresponding lifting and adjusting mechanism action is adjusted according to the acting force to maintain the difference in acting force between any of the lifting and adjusting mechanisms and the tower crane base within a preset range.

[0029] The tower crane base leveling device provided in this application utilizes a levelness detection device to detect the real-time inclination of the tower crane base relative to the horizontal plane and transmits the real-time inclination to a control mechanism. The control mechanism then adjusts the corresponding lifting and lowering adjustment mechanism according to the real-time inclination, thereby reducing the real-time inclination of the tower crane base relative to the horizontal plane, ensuring that the inclination of the tower crane base is always within a safe range and preventing safety accidents. The tower crane base leveling method provided in this application utilizes the aforementioned tower crane base leveling device and thus has the same beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0031] Figure 1 A top view of a tower crane base leveling device provided in one embodiment of the present application;

[0032] Figure 2 A side view of a tower crane base leveling device provided in one embodiment of the present application;

[0033] Figure 3 A schematic diagram of a lifting and adjusting mechanism provided in one embodiment of the present application;

[0034] Figure 4 A schematic diagram of a lifting and adjusting mechanism provided in another embodiment of the present application;

[0035] Figure 5 A flow chart of a tower crane base leveling method provided in one embodiment of the present application;

[0036] Figure 6 A flow chart of a tower crane base leveling method provided in another embodiment of the present application;

[0037] Figure 7This is a flow chart of a tower crane base leveling method provided in another embodiment of the present application.

[0038] in:

[0039] 10-tower structure, 20-tower crane base;

[0040] 30-level detection mechanism, 40-straight beam, 50-lifting adjustment mechanism, 60-control mechanism, 70-base plate;

[0041] 51-cylinder, 52-displacement sensor, 53-piston rod, 54-locking nut, 55-drive gear, 56-drive assembly, 57-crossbeam, 58-rack, 59-gear. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0044] Please refer to Figure 1 and Figure 2 The embodiment of the present application provides a tower crane base leveling device for adjusting the verticality of the tower structure 10 and the horizontality of the tower crane base 20. The tower crane base leveling device mainly includes a horizontality detection mechanism 30, a lifting and adjusting mechanism 50 and a control mechanism 60. The control mechanism 60 signals are connected to the horizontality detection mechanism 30 and the lifting and adjusting mechanism 50. A plurality of lifting and adjusting mechanisms 50 are respectively arranged at each top corner of the tower crane base 20, that is, below the four corners shown in the figure. The horizontality adjustment mechanism can use an electronic level meter arranged at the tower crane base 20, or a laser rangefinder arranged at each lifting and adjusting mechanism 50. By measuring the distance between the two end points, multi-point data and horizontality information can be obtained, or the above two schemes can be used at the same time to improve the safety and reliability of the horizontality detection. After the control mechanism 60 obtains the real-time inclination angle, it determines the top angle of the tower crane base 20 that is too high / too low according to the real-time inclination angle, and then controls the lifting and lowering of the lifting and adjusting mechanism 50 at this position to control the real-time inclination angle within a safe range. For example, the tower crane base 20 Figure 1 When the top angle shown is low, the lifting adjustment mechanism 50 on the left side is raised, thereby controlling the levelness within a safe range.

[0045] In the above embodiment, the lifting and adjusting mechanism 50 specifically adopts a hydraulic jacking oil cylinder, which includes a piston rod 53 and a cylinder barrel 51. The piston rod 53 is connected and supported at the bottom of the tower crane base 20, and is used to lift the tower crane base 20 to adjust its level. In this embodiment, in order to prevent the hydraulic jacking oil cylinders from collapsing after being adjusted to the right level, the hydraulic jacking oil cylinders are further provided with a mechanical locking mechanism, which includes a drive assembly 56. The drive assembly 56 is connected to the control mechanism 60. When the control mechanism 60 controls the hydraulic jacking oil cylinder to adjust the level of the tower crane base 20 to the right level, the control mechanism 60 controls the drive assembly 56 to move, so that the connecting and unloading locking mechanism switches to a preset state, i.e., a locked state, and locks the piston rod 53 relative to the cylinder barrel 51, thereby preventing the hydraulic jacking oil cylinders from retracting due to oil leakage or other reasons.

[0046] In one embodiment, reference Figure 3 The top of the piston rod 53 is threaded to a predetermined length to form an external threaded section. The mechanical locking mechanism includes a displacement sensor 52, a locking nut 54, a drive gear 55, and the aforementioned drive assembly 56. The displacement sensor 52 is connected to the control mechanism 60 and is used to detect the displacement of the piston rod 53 relative to the cylinder barrel 51. The locking nut 54 is sleeved on the external threaded section of the piston rod 53. Twisting the locking nut 54 can cause the locking nut 54 to move up and down relative to the piston rod 53. The outer wall of the locking nut 54 is provided with helical teeth that cooperate with the drive gear 55. The drive gear 55 is connected to a drive assembly 56, such as a drive motor. Driven by the drive assembly 56, the drive gear 55 rotates and drives the locking nut 54 to move up and down relative to the piston rod 53. The control mechanism 60 can control the drive assembly 56 to drive the locking nut 54 down a corresponding distance based on the elongation displacement of the piston rod 53 detected by the displacement sensor 52. After the horizontal adjustment is in place, the locking nut 54 is in contact with the cylinder barrel 51, locking the cylinder barrel 51 and the piston rod 53 relative to each other. When the hydraulic lifting cylinder requires the piston rod 53 to descend to adjust the horizontality, the control mechanism 60 controls the driving assembly 56 to drive the locking nut 54 to rise relative to the piston rod 53 to avoid affecting the action of the hydraulic lifting cylinder.

[0047] In one embodiment, reference Figure 4The mechanical locking mechanism includes a displacement sensor 52, a crossbeam 57, a pair of racks 58, a pair of gears 59, and a pair of drive assemblies 56, such as a drive motor. The displacement sensor 52 is connected to the control mechanism 60 and is used to detect the displacement of the piston rod 53 relative to the cylinder 51. The crossbeam 57 is vertically connected to the top of the piston rod 53. A pair of racks 58 are fixed to the two ends of the crossbeam 57. The racks 58 are arranged parallel to the piston rod 53. The outer wall of the cylinder 51 can be provided with a guide mechanism for positioning the racks 58 as needed. The drive assembly 56 drives the crossbeam 57 to move along with the piston rod 53 through the cooperation of the drive gear 55 and the racks 58. After the tower crane base 20 is adjusted to the correct level, the control mechanism 60 controls the drive assembly 56 to power off and stop operation, and uses the gears 59 and racks 58 to lock the piston rod 53 relative to the cylinder 51.

[0048] In the above embodiment, to enhance the stability of the hydraulic lifting cylinders, a base plate 70 is provided at the bottom of each hydraulic cylinder. Furthermore, the tower crane base leveling device includes multiple sets of cross-beams 40 that connect the tower crane base 20. These multiple sets of cross-beams 40 are evenly spaced, with both ends of the cross-beams 40 extending beyond the tower crane base 20. Hydraulic lifting cylinders are positioned at both ends of the cross-beams 40, creating a lever to facilitate adjustment of the tower crane base 20.

[0049] In one embodiment, the tower crane base leveling device provided in this application further includes pressure sensors disposed between the lifting and lowering adjustment mechanism 50 and the tower crane base 20. All pressure sensor signals are connected to a control mechanism 60, so that the control mechanism 60 adjusts the lifting and lowering of the lifting and lowering adjustment mechanism 50 at the corresponding position based on the detected pressure. For example, if the pressure values ​​detected by the multiple pressure sensors are F1, F2, F3, and F4, respectively, and F1 < F2 < F3 < F4, then the height of the lifting and lowering adjustment mechanism 50 at the pressure sensor corresponding to F1 is relatively high, and the height of the lifting and lowering adjustment mechanism 50 at the pressure sensor corresponding to F4 is relatively low. In this case, the control mechanism 60 controls the contraction of the lifting and lowering adjustment mechanism 50 at the pressure sensor corresponding to F1 and the extension of the lifting and lowering adjustment mechanism 50 at the pressure sensor corresponding to F4, thereby maintaining the difference in the pressure sensor values ​​at each position within a set range and ensuring that the tower crane base 20 is level. In addition, the control mechanism 60 can also calculate the average of the detection pressure / force of each pressure sensor, and adjust the corresponding lifting and lowering adjustment mechanism 50 according to the difference between the detection pressure value of each pressure sensor and the average value. When the detection pressure is greater than the average value, the height of the lifting and lowering adjustment mechanism 50 at the corresponding position is increased, and when the detection pressure is less than the average value, the height of the lifting and lowering adjustment mechanism 50 at the corresponding position is decreased.

[0050] An embodiment of the present application provides a tower crane base leveling method, which is applied to the tower crane base leveling device. Figure 5 ,include:

[0051] Step S10: Automatically monitor and obtain the real-time inclination angle of the tower crane base 20 relative to the horizontal plane at any time. Specifically, a level detection mechanism 30 is set on the tower crane base 20, and the level detection mechanism 30 is used to detect the inclination angle of the tower crane base 20 in real time. The setting of the level detection mechanism 30 is specifically referred to the above embodiment and will not be repeated here.

[0052] Step S20: When the real-time inclination angle exceeds the set inclination angle, the lifting and adjusting mechanism 50 is controlled to lift and adjust the height of each top corner of the tower crane base 20 to maintain the tower crane base 20 level. The specific process is to use the control mechanism 60 to receive and obtain the real-time inclination angle detected by the level detection mechanism 30. The control mechanism 60 determines the height of each top corner of the tower crane base 20 according to the real-time inclination angle, and controls the lifting and adjusting mechanism 50 at the corresponding top corner to operate until the real-time inclination angle is within a safe range.

[0053] The tower crane base leveling method provided in one embodiment of the present application is referred to Figure 6 After step S20, the process further includes step S30: locking the lifting adjustment mechanism 50 after the lifting adjustment mechanism 50 adjusts and maintains the tower crane base 20 horizontally. In this embodiment, the lifting adjustment mechanism 50 specifically adopts a hydraulic jacking oil cylinder with a mechanical locking mechanism. The control mechanism 60 is connected to the drive assembly 56 of the mechanical locking mechanism. The control mechanism 60 controls the lifting adjustment mechanism 50 to adjust the horizontality and controls the drive assembly 56 to move after confirming that the horizontality / real-time inclination angle of the tower crane base 20 is within a safe range, thereby locking the piston rod 53 and cylinder barrel 51 of the hydraulic jacking oil cylinder relative to each other. The configuration of the mechanical locking mechanism can be referred to the above embodiment and will not be described in detail in this application.

[0054] The tower crane base leveling method provided in one embodiment of the present application is referred to Figure 7 , further comprising performing step S12 before step S20 to detect the forces / pressures between the various top angles of the tower crane base 20 and the various lifting adjustment mechanisms, wherein the control mechanism 60 comprehensively judges the inclination of the tower crane base 20 based on the real-time inclination angle, the forces between the various lifting adjustment mechanisms and the tower crane base 20, and adjusts the lifting adjustment mechanisms 50 at the corresponding positions based on the real-time inclination angle and the forces, maintaining the difference in forces between the various lifting adjustment mechanisms 50 and the tower crane base 20 within a preset range, while maintaining the real-time inclination angle of the tower crane base 20 within the set range.

[0055] It can be understood that the adjustment of the horizontality of the tower crane base 20 by the above control mechanism 60, that is, the adjustment of each lifting adjustment mechanism 50 is not done in one go, but an adjustment step of the lifting adjustment cylinder is set based on the detected real-time inclination angle / force, and then the real-time inclination angle / force is repeatedly detected based on the adjusted state, that is, the control mechanism 60 can adjust the adjustment step of the lifting adjustment mechanism 50 based on the PID algorithm.

[0056] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0057] The above is a detailed introduction to the tower crane base leveling device and method provided by this application. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of this application, several improvements and modifications can be made to this application, and these improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A tower crane base leveling device, characterized in that: include: Level detection mechanism, used to detect the real-time inclination angle of the tower crane base relative to the horizontal plane; The lifting and adjusting mechanism is located at each corner of the bottom of the tower crane base and is used to lift and adjust the horizontality of the tower crane base; a control mechanism, connected to the level detection mechanism and the lifting and adjusting mechanism, and controlling the movement of the lifting and adjusting mechanism at a corresponding position according to the real-time inclination angle to maintain the tower crane base level; The lifting adjustment mechanism includes a hydraulic jacking cylinder, and the hydraulic jacking cylinder is provided with a mechanical locking mechanism. The mechanical locking mechanism includes a drive assembly connected to the control mechanism. The control mechanism is used to control the drive assembly to switch the mechanical locking mechanism to a preset state after the hydraulic jacking cylinder is adjusted into position, so as to maintain the cylinder barrel and piston rod of the hydraulic jacking cylinder locked; The locking mechanism comprises: A crossbeam, vertically fixed to the piston rod; Racks, a pair of racks are respectively fixed to the two ends of the beam, and the racks are arranged parallel to the piston rod; a gear connected to the drive assembly and meshing with the rack; The control mechanism is used to control the driving assembly to stop after the horizontality of the tower crane base is adjusted to the correct level; A pressure sensor is provided between any of the lifting and adjusting mechanisms and the tower crane base, and all of the pressure sensors are connected to the control mechanism. The control mechanism is used to control the action of the lifting and adjusting mechanism according to the pressure value of the pressure sensor.

2. The tower crane base leveling device according to claim 1, characterized in that: The top of the piston rod is provided with an external thread section, and the mechanical locking mechanism includes: a displacement sensor for detecting a movement distance of the piston rod relative to the cylinder, the displacement sensor being connected to the control mechanism; a driving gear connected to the driving assembly; A locking nut is sleeved on the external thread section, and an outer wall of the locking nut is provided with helical teeth that cooperate with the driving gear; The control mechanism is used to adjust the driving assembly according to the movement distance to drive the locking nut to move relative to the piston rod, so that the locking nut fits into the cylinder barrel to lock the hydraulic jacking cylinder.

3. The tower crane base leveling device according to claim 2, characterized in that: A bottom plate is provided at the bottom of any of the hydraulic jacking cylinders.

4. The tower crane base leveling device according to claim 1, characterized in that: It also includes a straight beam connecting the tower crane base, wherein the straight beams are cross-arranged in multiple groups and extend to the outer periphery of the tower crane base, and the lifting and lowering adjustment mechanisms are respectively arranged at both ends of the straight beams.

5. A tower crane base leveling method, characterized in that: The tower crane base leveling device according to any one of claims 1 to 4 comprises: Automatically monitor and obtain the real-time inclination angle of the tower crane base relative to the horizontal plane at any time; When the real-time inclination angle exceeds the set inclination angle, the lifting and adjusting mechanism is controlled to lift and adjust the height of each top angle of the tower crane base to maintain the tower crane base level; Wherein, the lifting and lowering adjustment mechanism is arranged at each top corner of the tower crane base.

6. The tower crane base leveling method according to claim 5, characterized in that: The method further includes locking the lifting adjustment mechanism after the lifting adjustment mechanism is adjusted to maintain the tower crane base level.

7. The tower crane base leveling method according to claim 6, characterized in that: The step of "controlling the lifting and lowering adjustment mechanism to lift and adjust the height of each top corner of the tower crane base to maintain the tower crane base level when the real-time inclination angle exceeds the set inclination angle" also includes: The acting force between any of the lifting and adjusting mechanisms and the tower crane base is detected, and the corresponding lifting and adjusting mechanism action is adjusted according to the acting force to maintain the difference in acting force between any of the lifting and adjusting mechanisms and the tower crane base within a preset range.

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