Large equipment hoisting device

Abstract

The application relates to the field of large equipment hoisting, and provides a large equipment hoisting device, which comprises a control system, a hoisting beam and a plurality of hoisting cable assemblies, the hoisting cable assemblies are connected to the lower side of the hoisting beam, the hoisting cable assembly comprises, from top to bottom, a lifting ring, a hydraulic oil cylinder and a lifting tool, the hydraulic oil cylinder is signal-connected with the control system and can automatically adjust the length under the control of the control system. Based on the above structure, during the hoisting of the large equipment hoisting device, the length of the hydraulic oil cylinder of each hoisting cable assembly can be automatically adjusted according to the deviation between the current hoisting state and the original lifting state of the large equipment, so that the hoisting state of the large equipment can be automatically adjusted, and the hoisting state of the large equipment can be conveniently, quickly, reliably and accurately adjusted to be close to the original lifting state, thereby the time consumption and manpower investment of the hoisting operation of the large equipment can be reduced, and the hoisting operation efficiency can be improved.

Description

Technical Field

[0001] This application belongs to the field of large equipment hoisting technology, and in particular relates to a large equipment hoisting device. Background Technology

[0002] Due to their large geometric dimensions, heavy weight, and small gaps between rotating and stationary parts, nuclear power plants require large steam turbine generators to maintain their original lifting position as much as possible during hoisting. If the hoisting is tilted, it can easily cause dynamic and static collisions, scratches, jamming, or even damage to the equipment.

[0003] As a result, during the hoisting of various large steam turbine generator equipment in nuclear power plants, it is necessary to repeatedly attempt to lift and adjust until the hoisting state of the equipment is close to the original lifting state before the hoisting operation can continue. This results in the hoisting operation of large equipment being time-consuming, labor-intensive, and having low work efficiency. Utility Model Content

[0004] This application provides a large equipment hoisting device, which aims to solve the problems of time-consuming, labor-intensive, and low-efficiency hoisting operations for large equipment.

[0005] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0006] Firstly, a large equipment hoisting device is provided, comprising:

[0007] Control system;

[0008] Hanging beam;

[0009] The sling assembly is provided in multiple parts, all of which are connected to the lower side of the lifting beam. The sling assembly includes a lifting ring, a hydraulic cylinder and a lifting device connected in sequence from top to bottom. The hydraulic cylinder is signal-connected to the control system and can automatically extend and retract to adjust its length under the control of the control system.

[0010] In some embodiments, the hydraulic cylinder is configured to monitor the load.

[0011] In some embodiments, the large equipment hoisting device includes an inclinometer, which is installed on the upper side of the large equipment and is signal-connected to the control system.

[0012] In some embodiments, the sling assembly is provided in two parts, and the inclinometer is a unidirectional inclinometer.

[0013] In some embodiments, the sling assembly has at least three parts, and the inclinometer is a bidirectional inclinometer.

[0014] In some embodiments, the inclinometer has an accuracy of 0.001°;

[0015] And / or, the resolution of the inclinometer is 0.0005°;

[0016] And / or, the response frequency of the inclinometer is 20Hz;

[0017] And / or, the inclinometer has a measurement range of -10° to 10°.

[0018] In some embodiments, two sling assemblies are provided, and the two sling assemblies are arranged at intervals along the length direction of the lifting beam and are symmetrically distributed about the central axis of the lifting beam.

[0019] In some embodiments, four sling assemblies are provided, and the four sling assemblies are distributed in a matrix array about the central axis of the suspension beam.

[0020] In some embodiments, the lower side of the lifting beam is provided with a first connecting portion corresponding to each of the sling assemblies, and the lifting ring is connected to the corresponding first connecting portion.

[0021] In some embodiments, the upper side of the lifting beam is provided with two second connecting portions, which are arranged at intervals along the length direction of the lifting beam and symmetrically distributed about the central axis of the lifting beam. The two second connecting portions are respectively connected to the crane hook via crane slings.

[0022] The advantages of the large equipment hoisting device provided in this application are as follows:

[0023] The large equipment hoisting device provided in this application embodiment can connect large equipment through various sling assemblies to hoist the large equipment. During the hoisting process, while the large equipment is slightly hoisted by the hoisting device and in a semi-free or fully free state, the hydraulic cylinders of each sling assembly are automatically extended and retracted to adjust their length according to the deviation between the current hoisting state and the original lifting state. This achieves automated adjustment of the hoisting state of the large equipment. Based on this, the hoisting state of the large equipment can be conveniently, quickly, reliably, and accurately adjusted to be close to the original lifting state, reducing the risk of dynamic and static collisions, scratches, jamming, or even damage to the large equipment due to hoisting skew. Moreover, it eliminates the need for multiple hoisting attempts, multiple lowerings, and multiple adjustments as in existing technologies, thereby reducing the time and manpower required for hoisting large equipment and improving hoisting efficiency. Attached Figure Description

[0024] To clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 Partial perspective view of a large equipment hoisting device provided in some embodiments of this application;

[0026] Figure 2 A front view showing the assembly of a large equipment hoisting device, a crane sling, and a crane hook provided in some embodiments of this application;

[0027] Figure 3 This is a connection diagram of a portion of the structure of a large equipment hoisting device provided in some embodiments of this application, wherein each hydraulic cylinder and inclinometer is connected to the control system signal.

[0028] The following are the labeling elements in the figure:

[0029] 10-Control system, 20-Lifting beam, L-Central axis of lifting beam, x-Length direction of lifting beam, 21-First connecting part, 22-Second connecting part, 30-Sling assembly, 31-Lifting ring, 32-Hydraulic cylinder, 33-Lifting tool, 40-Inclinometer, 50-Tractor sling, 60-Tractor hook. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clear, the application will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application. Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions.

[0031] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] Nuclear power plants use various large steam turbine generator equipment (such as steam turbine rotors, generator rotors, steam turbine cylinders, generator stators, exciters, etc.). Due to their large geometric dimensions, heavy weight, and very small clearance between rotating and stationary parts (i.e., dynamic-static clearance), it is necessary to maintain the original lift of the equipment as much as possible during hoisting. Once the hoisting is skewed (i.e., the original lift of the equipment is not maintained), dynamic-static collisions (i.e., collisions between rotating and stationary parts), scratches, jamming, or even damage to the equipment can easily occur.

[0035] Taking the ALSTOM half-speed nuclear power large steam turbine generator as an example, the cylinder dimensions are approximately 10m × 8m × 5m, the cylinder weight is approximately 150t, the rotor diameter is approximately 6m, the length is approximately 12m, the rotor weight is approximately 190t, and the minimum clearance between rotating and stationary parts is approximately 1mm. During the hoisting process, it is required to maintain the original lift of the rotor and cylinder as much as possible.

[0036] Currently, the lifting process for the upper cylinder is as follows: The upper cylinder is hooked onto the sling of the lifting device, and then lifting begins. If one corner or two corners on one side of the upper cylinder leaves the support surface of the lower cylinder, slight lifting can continue. During lifting, the height distance between the four corners of the upper cylinder and the mid-section of the lower cylinder is checked. When the lifting height deviation of the four corners of the upper cylinder is greater than or equal to 4mm, the upper cylinder is lowered until the sling is completely loosened. The turnbuckle above the sling is then adjusted to change the sling length. Lifting is repeated, and the deviation is checked again. If necessary, the cylinder is lowered again and adjusted again. This process of lifting and adjusting is repeated until the lifting height deviation of the four corners of the upper cylinder is less than 4mm when the upper cylinder is slightly away from the lower cylinder and in a free state. During hoisting, a frame level is used to measure the horizontal deviation of the upper cylinder in two directions. If the deviation is large, the upper cylinder is lowered until the sling is completely loosened. The turnbuckle above the sling is then adjusted to change the sling length. The cylinder is then hoisted again, and the deviation is checked again. If necessary, it is lowered again and adjusted again. This process of hoisting and adjusting is repeated until the upper cylinder is slightly separated from the lower cylinder and in a free state, and the bubble in the frame level is basically centered. Then, the upper cylinder can be slowly hoisted, moved away, and placed in the designated area. The entire process usually takes 4 to 8 hours, depending on the level of skill.

[0037] The process of lifting the upper cylinder back is similar. Although there is no lower cylinder as a reference to measure the lifting height deviation of the four corners of the upper cylinder, it is still necessary to try lifting multiple times, measure the level deviation multiple times, drop multiple times, and adjust multiple times until the level deviation meets the requirements before the upper cylinder can be lifted back.

[0038] Similarly, the hoisting process for various large steam turbine generator equipment in nuclear power plants (such as steam turbine rotors, generator rotors, steam turbine cylinders, generator stators, exciters, etc.) is similar. It requires repeated attempts to lift and adjust until the lifting state of the equipment is close to the original lifting state before the hoisting operation can continue. This results in the hoisting operation of large equipment being time-consuming, labor-intensive, and having low work efficiency.

[0039] The embodiments provided in this application will solve the above problems.

[0040] To illustrate the technical solutions provided in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0041] Please see Figure 1 , Figure 2 , Figure 3Some embodiments of this application provide a large equipment hoisting device, including a control system 10, a lifting beam 20, and a sling assembly 30. Multiple sling assemblies 30 are provided, all of which are connected to the lower side of the lifting beam 20. The sling assembly 30 includes a lifting ring 31, a hydraulic cylinder 32, and a lifting device 33 connected sequentially from top to bottom. The hydraulic cylinder 32 is signal-connected to the control system 10 and can automatically extend and retract to adjust its length under the control of the control system 10.

[0042] It should be noted that the large equipment hoisting device provided in this embodiment is suitable for hoisting various large equipment, especially for hoisting various large steam turbine generator equipment in nuclear power (such as steam turbine rotor, generator rotor, steam turbine cylinder, generator stator, exciter, etc.), with a load range of approximately 10t to 400t.

[0043] It should also be noted that the lifting beam 20 is a lifting beam used to connect to the crane hook 60 and to install and support all the sling assemblies 30. The lifting beam 20 can be directly connected to the crane hook 60 or indirectly connected via other components (such as crane slings 50). The shape, size, and material of the lifting beam 20 can be flexibly set as needed; for example, the lifting beam 20 can be a steel structure, etc.

[0044] At least two sling assemblies 30 are provided, and the number of sling assemblies 30 can be determined according to the load of the large equipment. In some embodiments, to facilitate the hoisting of large rotors (such as steam turbine rotors, generator rotors, etc.), two sling assemblies 30 may be provided. In other embodiments, to facilitate the hoisting of large equipment such as steam turbine cylinders, generator stators, exciters, etc., four sling assemblies 30 may be provided. Of course, in other embodiments, three, five, etc., sling assemblies 30 may be provided.

[0045] Each sling assembly 30 is connected and fixed to the lower side of the lifting beam 20. The sling assemblies 30 are arranged at intervals on the lower side of the lifting beam 20 and can be flexibly arranged as needed (e.g., linear interval arrangement, matrix array arrangement, etc.).

[0046] Each sling assembly 30 includes a lifting ring 31, a hydraulic cylinder 32, and a lifting device 33, which are arranged and connected sequentially from top to bottom. Each sling assembly 30 is fixed to the lower side of the lifting beam 20 via the lifting ring 31. The lifting ring 31 and the lifting beam 20 can be connected by, but are not limited to, chain link connections, shackle connections, double-ring connections, pin hinges, etc. The lifting device 33 can be used to connect large equipment. The lifting device 33 can be a ring structure or a rope structure. The material of the lifting device 33 can be flexibly set as needed, for example, the lifting device 33 can be steel wire rope, high-strength fiber slings, etc.

[0047] The hydraulic cylinder 32 is an integrated hydraulic cylinder capable of extending and retracting in the vertical direction and adjusting its length. The structure of the hydraulic cylinder 32 can be designed as needed and can be diversified. In some embodiments, the hydraulic cylinder 32 may include a cylinder (for converting hydraulic energy into mechanical linear motion), an oil tank (for storing hydraulic oil), a pump station (for delivering hydraulic oil), a control valve group (for controlling the direction, speed, and pressure of hydraulic oil delivery), oil pipes (for providing hydraulic oil delivery pipelines), a pressure sensor (for real-time pressure monitoring), a displacement sensor (for detecting the position of the piston in the cylinder), and a control unit (for sending and receiving signals and controlling the operation of various components of the hydraulic cylinder 32). In some embodiments, the hydraulic cylinder 32 can perform a protective function and remain in its original state in the event of a malfunction. In some embodiments, the hydraulic cylinder 32 has a slow-descent function in the event of oil pipe damage, with a slow-descent speed of 3 mm / min.

[0048] The control system 10 is a device with calculation and analysis functions and logic control functions. The control system 10 can be, but is not limited to, a PLC (Programmable Logic Controller) control system 10. The control system 10 is connected to the hydraulic cylinder 32 by signals, and the control system 10 can control the hydraulic cylinder 32 to extend and retract as needed.

[0049] In summary, the large equipment hoisting device provided in this application embodiment can connect large equipment through various sling assemblies 30 to hoist large equipment. During the hoisting process, while the large equipment is slightly hoisted by the hoisting device and in a semi-free or fully free state, the hydraulic cylinders 32 of each sling assembly 30 are automatically extended and retracted to adjust their length according to the deviation between the current hoisting state and the original lifting state. This achieves automated adjustment of the hoisting state of the large equipment. Based on this, the hoisting state of the large equipment can be conveniently, quickly, reliably, and accurately adjusted to be close to the original lifting state, reducing the risk of dynamic and static collisions, scratches, jamming, or even damage to the large equipment due to hoisting skew. Moreover, it eliminates the need for multiple attempts to hoist, lower, and adjust as in the prior art, thereby reducing the time and manpower required for hoisting large equipment and improving hoisting efficiency.

[0050] In practical applications, compared to existing technologies, using the large equipment hoisting device provided in this embodiment can save nearly half the operation time for hoisting large equipment. Taking the ALSTOM half-speed nuclear power large steam turbine generator as an example, the existing hoisting method would take 8 hours, while the hoisting operation using the large equipment hoisting device provided in this embodiment would take approximately 4 hours.

[0051] In routine maintenance operations at nuclear power plants, the hoisting of large equipment such as steam turbine generators is a critical process. By employing the large equipment hoisting device provided in this embodiment for these critical processes, time can be saved in two ways. It is estimated that approximately 12 hours can be saved for each major overhaul operation involving turbine startup, thereby improving maintenance efficiency, shortening the maintenance period, and increasing economic benefits. On the other hand, manpower input can be reduced, with an estimated reduction of 20 man-days per major overhaul operation involving turbine startup, thus lowering labor costs.

[0052] In existing technologies, the load on each sling of a lifting device during the lifting process is unclear and can only be assumed to be uniform, which affects the safety of the lifting operation. To resolve this issue, please refer to [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 In some embodiments of this application, the hydraulic cylinder 32 is configured to monitor the load.

[0053] It should be noted that the hydraulic cylinder 32 can automatically monitor its own load and transmit the monitoring result signal to the control system 10. In some embodiments, the hydraulic cylinder 32 can measure its own force through a pressure sensor, strain gauge, or force sensor to determine the load.

[0054] By adopting the above scheme, during the period when the large equipment is slightly lifted by the hoisting device, resulting in a semi-free or fully free state, the hydraulic cylinders 32 can automatically monitor their own load and feed the monitoring results back to the control system 10. The control system 10 can perform logical calculations on the "deviation between the current lifting state and the original lifting state of the large equipment", "the load of each hydraulic cylinder 32", and "the load deviation of at least one group of hydraulic cylinders 32", and issue commands to each hydraulic cylinder 32 according to the logical calculation results to control each hydraulic cylinder 32 to automatically extend and retract to adjust its length. Based on this, the lifting state of the large equipment can be automatically adjusted, the load of each sling assembly 30 can be automatically adjusted, and the load of at least some sling assemblies 30 can be automatically balanced. This can improve both the efficiency and safety of hoisting operations, reduce the risk of damage or breakage of some sling assemblies 30 due to overload, and improve the reliability and service life of the large equipment hoisting device.

[0055] For example, in a specific application example, a large equipment lifting device uses two sling assemblies 30 to lift a large rotor (such as a steam turbine rotor, generator rotor, etc.). In this case, the loads of the two sling assemblies 30 are different. It is not necessary to compare the loads between the two hydraulic cylinders 32. Alternatively, a load limit can be set according to the actual load, and an alarm can be issued when the load monitored by the hydraulic cylinder 32 deviates from the set value by ≥5%. This allows for timely inspection of the current lifting status of the large equipment, enabling early and timely detection of problems.

[0056] For example, in a specific application example, a large equipment hoisting device uses four sling assemblies 30 to hoist large equipment such as steam turbine cylinders, generator stators, and exciters. In this case, the load of the sling assembly 30 located at the front is different from that of the sling assembly 30 located at the rear. Load comparison between the two hydraulic cylinders 32 can be omitted, or a load limit can be set according to the actual load. An alarm can be issued when the load monitored by the hydraulic cylinder 32 deviates from the set value by ≥5%, so as to promptly check the current hoisting status of the large equipment and detect problems early. The load of the sling assembly 30 located on the left is close to that of the sling assembly 30 located on the right. Load comparison between the two hydraulic cylinders 32 can be performed at any time. When the load deviation between the two hydraulic cylinders 32 is ≥5%, the two hydraulic cylinders 32 are automatically controlled to extend and retract to adjust their length, thereby achieving automatic load balancing adjustment.

[0057] Please see Figure 1 , Figure 2 , Figure 3 In some embodiments of this application, the large equipment hoisting device includes an inclinometer 40, which is used to be installed on the upper side of the large equipment and is signal-connected to the control system 10.

[0058] It should be noted that the inclinometer 40 is mounted on the upper side of the large equipment and securely fixed relative to it. The inclinometer 40 is connected to the control system 10 via signal transmission. The inclinometer 40 can measure the attitude angle of the large equipment in at least one direction and transmit the measurement result signal to the control system 10. Different models and specifications of the inclinometer 40 can be selected as needed.

[0059] By adopting the above scheme, the inclinometer 40 installed on the upper side of the large equipment can measure the original attitude angle (i.e., original lift) of the large equipment when it is in the application assembly state and the large equipment hoisting device has not lifted it, so as to sense the original lift state of the large equipment; it can also measure the current attitude angle of the large equipment in real time during the period when the large equipment hoisting device slightly lifts the large equipment, making the large equipment in a semi-free or fully free state, especially during the automatic adjustment of the lifting state of the large equipment, so as to sense the current lifting state of the large equipment in real time. Based on this, the control system 10 can receive and save the original attitude angle and current attitude angle of the large equipment measured by the inclinometer 40 in a timely manner, and perform data comparison and analysis to obtain the "deviation between the current lifting state and the original lift state of the large equipment". Therefore, during the period when the large equipment is slightly lifted by the hoisting device, making the large equipment semi-free or fully free, the control system 10 can automatically extend and retract the hydraulic cylinders 32 of each sling assembly 30 to adjust their length when the deviation between the current lifting state and the original lifting state of the large equipment reaches a preset limit. This continues until the control system 10 determines, based on the real-time measurement results of the inclinometer 40, that the deviation between the current lifting state and the original lifting state of the large equipment has been adjusted to the expected limit. This allows for precise automatic adjustment of the lifting state of the large equipment, enabling convenient, fast, reliable, and accurate adjustment of the lifting state to be close to the original lifting state. This improves the efficiency and quality of hoisting operations and reduces the risk of dynamic and static collisions, scratches, jamming, or even damage to the large equipment caused by hoisting skew.

[0060] Of course, in other embodiments, other measuring instruments can be used to help determine the "deviation between the current lifting state and the original lifting state of the large equipment".

[0061] Please see Figure 1 , Figure 2 , Figure 3 In some embodiments of this application, two sling assemblies 30 are provided, and the inclinometer 40 is a unidirectional inclinometer. This embodiment is mainly applicable to hoisting large rotors (such as steam turbine rotors, generator rotors, etc.).

[0062] By adopting the above scheme, when there are only two sling assemblies 30, by making the inclinometer 40 a unidirectional inclinometer, the inclinometer 40 can monitor the attitude angle of the large equipment in a specific direction in real time. This simplifies the algorithm, speeds up the response, and allows the control system 10 to quickly analyze and determine the "deviation between the current lifting state and the original lifting state of the large equipment". Based on this, the hydraulic cylinders 32 of the two sling assemblies 30 can be quickly extended and retracted to adjust their length, thereby quickly correcting and adjusting the lifting state of the large equipment. This reduces the time spent on lifting the large equipment and improves the efficiency of the lifting operation.

[0063] For example, in a specific application example, a large equipment lifting device lifts a large rotor from inside a cylinder. In this case, an inclinometer 40 can be placed on the upper middle part of the large rotor. At this time, the large rotor is still in the application assembly state and has not yet left the cylinder. The measurement data of the inclinometer 40 at this time can be used as the original attitude angle α of the large rotor. Then, the large rotor is slightly lifted. When one end of the large rotor leaves the support, the inclinometer 40 measures the current attitude angle β of the large rotor in real time. It is required that β ≤ α ± 0.03°. Otherwise, the lifting state of the large rotor needs to be automatically adjusted, and the adjustment target is β ≤ α ± 0.005°. Then, the large rotor continues to be lifted, and the lifting state of the large rotor is adjusted again if necessary, until the large rotor is completely off the support and in the application assembly state. In the free state, if the current attitude angle of the large rotor satisfies β≤α±0.02°, the adjustment operation of the lifting state of the large rotor ends; otherwise, the lifting state of the large rotor needs to be adjusted again, with the adjustment target requirement being β≤α±0.005°. Subsequently, a locking command is given, and the control panel of the control system 10 only displays the current attitude angle of the large rotor and the load data of each hydraulic cylinder 32, but no longer performs logical operations and state adjustment operations, so as to ignore false signals such as attitude angle changes and load changes caused by the swaying of the large rotor during subsequent hoisting and movement. Finally, the large rotor is lifted, moved, and stored on the roller bracket.

[0064] For example, in a specific application example, a large equipment hoisting device lifts a previously stored large rotor from a roller support outside the cylinder. In this case, the inclinometer 40 can be placed on the upper middle part of the large rotor, but the measurement data of the inclinometer 40 at this time is not used as the original attitude angle of the large rotor (because the large rotor is in a disassembled and stored state, not in an application assembly state). Instead, the original attitude angle α of the large rotor stored in the control system 10 when it was previously lifted from the cylinder (or the original attitude angle α is manually input by the operator) should be used. Then, the large rotor is slightly lifted, and when one end of the large rotor leaves the support, the inclinometer 40 measures the current attitude angle β of the large rotor in real time. It is required that β ≤ α ± 0.06°. Otherwise, the lifting state of the large rotor needs to be automatically adjusted to meet the target requirement β. ≤α±0.005°; Subsequently, continue to lift the large rotor, and if necessary, readjust the lifting state of the large rotor until the large rotor is completely off the support and in a free state. At this time, if the current attitude angle of the large rotor satisfies β≤α±0.02°, the adjustment operation of the lifting state of the large rotor is over; otherwise, the lifting state of the large rotor needs to be adjusted again, with the adjustment target requirement being β≤α±0.005°; Subsequently, a lockout command is given, and the control panel of the control system 10 only displays the current attitude angle of the large rotor and the load data of each hydraulic cylinder 32, without performing any logic calculations or state adjustment operations; Finally, the large rotor is lifted, moved, and installed into the cylinder.

[0065] Please see Figure 1 , Figure 2 , Figure 3 In some embodiments of this application, the sling assembly 30 is provided with at least three slings, and the inclinometer 40 is a bidirectional inclinometer. This embodiment is mainly applicable to hoisting large equipment such as steam turbine cylinders, generator stators, and exciters.

[0066] By adopting the above scheme, when there are three or more sling assemblies 30, by making the inclinometer 40 a bidirectional inclinometer, the inclinometer 40 can simultaneously detect the attitude angle of the large equipment in two directions (two dimensions), which can basically cover the spatial attitude of the large equipment. This makes it easier for the control system 10 to control the hydraulic cylinders 32 of each sling assembly 30 to extend and retract as needed, so as to adjust the lifting state of the large equipment in a multi-dimensional coordinated and precise manner. This can accurately realize the automated adjustment operation of the lifting state of the large equipment, and can improve the efficiency and quality of the lifting operation.

[0067] For example, in a specific application example, a large equipment hoisting device lifts a cylinder during cylinder opening. In this case, an inclinometer 40 can be placed at a suitable position on the upper side of the cylinder. At this time, the cylinder is still in the application assembly state, and the measurement data of the inclinometer 40 at this time can be used as the original attitude angle, where the axial original attitude angle is α1 and the lateral original attitude angle is α2. Subsequently, the upper half of the cylinder is slightly lifted. If one corner or two corners on one side of the upper half of the cylinder leaves the support surface of the lower half of the cylinder, the lifting can continue slightly. During the lifting, the inclinometer 40 monitors data in real time, including the axial current... The forward attitude angle β1 and the lateral current attitude angle β2 are monitored. Lifting can continue when β1 ≤ α1 ± 0.03° and β2 ≤ α2 ± 0.03°. Lifting stops when β1 > α1 ± 0.03° or β2 > α2 ± 0.03°, and automated adjustment of the lifting status of the large equipment is performed. Simultaneously, the load on each hydraulic cylinder 32 is monitored, requiring the load deviation of the left and right hydraulic cylinders 32 on the front side to be ≤5%, and the load deviation of the left and right hydraulic cylinders 32 on the rear side to be ≤5%. If the load deviation is ≤5%, and the load deviation is ≥5%, automatic load balancing adjustment should be performed simultaneously (an alarm can also be issued to facilitate timely inspection of equipment status). When the adjustment reaches β1≤α1±0.005° and β2≤α2±0.005°, lifting can continue, while continuously monitoring β1 and β2. When β1>α1±0.03° or β2>α2±0.03°, lifting should be stopped again, and adjustment work should be repeated until all four corners of the upper cylinder are completely disengaged from the lower cylinder. The upper cylinder is in a free state; monitor β1 and β2 again, as well as the load of the four hydraulic cylinders 32. When β1≤α1±0.02°, β2≤α2±0.02°, the load deviation of the two front hydraulic cylinders 32 is ≤5%, and the load deviation of the two rear hydraulic cylinders 32 is ≤5%, the adjustment operation of lifting the upper cylinder ends, and no more logical calculations and adjustment operations are performed; finally, the upper cylinder is lifted, moved, and stored on the support at the designated location.

[0068] For example, in a specific application example, a large equipment hoisting device lifts a cylinder from a support during cylinder clamping. In this situation, an inclinometer 40 can be placed at a suitable position on the upper side of the cylinder. However, the measurement data of the inclinometer 40 at this time is not used as the original attitude angle (because the cylinder is in a disassembled and stored state, not in an application and assembly state). The original attitude angle of the cylinder before opening should be used (which can be pre-stored in the control system 10 or manually input by the operator). Among them, the axial original attitude angle is α1 and the lateral original attitude angle is α2. Then, the upper half of the cylinder is slightly lifted. If one corner or two corners on one side of the upper half of the cylinder leaves the support surface of the support, the lifting can continue slightly. During the lifting, the inclinometer 40 monitors the data in real time, including the current axial attitude angle β1 and the current lateral attitude angle β2. When β1≤α1±0.06° and β2≤α2±0.06°, the lifting can continue. When β1>α1±0.06° or β2>α2±0.06°, the lifting is stopped, and the automatic adjustment operation of the lifting status of the large equipment is carried out. At the same time, the load of each hydraulic cylinder 32 is monitored. The load deviation of the two front left and right hydraulic cylinders 32 should be ≤5%, and the load deviation of the two rear left and right hydraulic cylinders 32 should be ≤5%. If the load deviation is ≥5%, an automatic load balancing adjustment operation should be performed simultaneously (an alarm can also be issued to facilitate timely inspection of the equipment status). When the adjustment reaches β1≤α1±0.005° and β2≤α2±0.005°, lifting can continue. β1 and β2 should be continuously monitored, and the adjustment operation should be performed again if necessary, until the upper half... All four corners of the cylinder are detached from the supports and are in a free state; β1 and β2, as well as the load of the four hydraulic cylinders 32, are monitored again. When β1≤α1±0.02°, β2≤α2±0.02°, the load deviation of the two front hydraulic cylinders 32 is ≤5%, and the load deviation of the two rear hydraulic cylinders 32 is ≤5%, the adjustment operation of lifting the upper cylinder is completed, and no more logical calculations and adjustment operations are performed; finally, the upper cylinder is lifted, moved, and installed into the lower cylinder.

[0069] Please see Figure 3 In some embodiments of this application, the inclinometer 40 has an accuracy of 0.001° (i.e., one-thousandth of a degree).

[0070] By adopting the above scheme, and by making the accuracy of the inclinometer 40 0.001°, the upper limit of the deviation between the measured value of the inclinometer 40 and the true value can be 0.001°. Based on this, the measurement accuracy of the inclinometer 40 can be improved, enabling the inclinometer 40 to meet the requirements of ultra-high precision. This facilitates the precise correction and fine adjustment of the lifting state of large equipment based on the measurement results of the inclinometer 40, reduces the deviation between the final adjusted lifting state of large equipment and the original lifting state, and can improve both the efficiency and quality of lifting operations.

[0071] Of course, in other embodiments, inclinometers of other accuracies 40 may be selected as needed.

[0072] Please see Figure 3 In some embodiments of this application, the inclinometer 40 has a resolution of 0.0005°.

[0073] By adopting the above scheme, and by setting the resolution of the inclinometer 40 to 0.0005°, the minimum angle increment that the inclinometer 40 can identify is 0.0005°. Based on this, the detection sensitivity of the inclinometer 40 can be improved, and the sensitivity to minute attitude fluctuations of large equipment can be increased. This makes it easier to make sensitive and precise adjustments to the lifting status of large equipment based on the measurement results of the inclinometer 40, thereby improving both the efficiency and quality of lifting operations.

[0074] Of course, in other embodiments, inclinometers 40 with different resolutions may be selected as needed.

[0075] Please see Figure 3 In some embodiments of this application, the response frequency of the inclinometer 40 is 20Hz.

[0076] By adopting the above scheme and setting the response frequency of the inclinometer 40 to 20Hz, the inclinometer 40 can achieve ultra-high frequency real-time monitoring and millisecond-level data updates (20 times / second). It can capture the instantaneous attitude changes of large equipment when it is not being lifted, during the lifting process, and during the adjustment process, thereby reducing the lag of the detection data. This makes it easier to adjust the lifting status of large equipment in a timely and precise manner based on the measurement results of the inclinometer 40, which can improve both the efficiency and quality of the lifting operation.

[0077] Of course, in other embodiments, inclinometers 40 with different response frequencies may be selected as needed.

[0078] Please see Figure 3 In some embodiments of this application, the inclinometer 40 has a measurement range of -10° to 10°.

[0079] It should be noted that when the inclinometer 40 is a unidirectional inclinometer, its measurement range in that direction is -10° to 10°. When the inclinometer 40 is a bidirectional inclinometer, its measurement range in both directions is -10° to 10°.

[0080] Since the attitude deviation of large equipment is small during the hoisting process, by adopting the above scheme and making the measurement range of the inclinometer 40 -10° to 10°, the range of the inclinometer 40 can be accurately matched with the actual working conditions of the hoisting of large equipment, and can cover the actual needs. This can reduce invalid data interference caused by out-of-range measurement, improve the measurement accuracy and data reliability of the inclinometer 40, and facilitate the effective adjustment of the hoisting state of large equipment based on the measurement results of the inclinometer 40, thereby improving both the efficiency and quality of the hoisting operation.

[0081] Of course, in other embodiments, inclinometers 40 with different ranges can be selected as needed.

[0082] Please see Figure 2 In some embodiments of this application, two sling assemblies 30 are provided, and the two sling assemblies 30 are arranged at intervals along the length x of the lifting beam 20 and are symmetrically distributed about the central axis L of the lifting beam 20. This embodiment is mainly applicable to the lifting of large rotors (such as steam turbine rotors, generator rotors, etc.), and the two sling assemblies 30 can be connected one-to-one at the lifting positions at opposite ends of the large rotor.

[0083] By adopting the above scheme, large rotors such as steam turbine rotors and generator rotors can be hoisted and their lifting status adjusted by using two sling assemblies 30 arranged at intervals along the length x of the lifting beam 20 and symmetrically distributed about the central axis L of the lifting beam 20. Based on this, the structure of the large equipment hoisting device can be simplified, the number of parts in the large equipment hoisting device can be reduced, the control logic can be simplified, and the efficiency of lifting status adjustment and hoisting operation can be improved. Furthermore, the symmetrical distribution of the two sling assemblies 30 helps to balance the torque of the two sling assemblies 30, reducing the risk of large equipment experiencing significant dynamic swaying during hoisting and enhancing the dynamic stability, reliability, and safety of the hoisting operation.

[0084] Please see Figure 1 , Figure 2 In some embodiments of this application, four sling assemblies 30 are provided, and the four sling assemblies 30 are distributed in a matrix array about the central axis L of the lifting beam 20. This embodiment is mainly applicable to the lifting of large equipment such as steam turbine cylinders, generator stators, and exciters. The four sling assemblies 30 can be connected one-to-one to the lifting positions at the four corners of the large equipment.

[0085] By adopting the above scheme, four sling assemblies 30 arranged in a matrix array about the central axis L of the lifting beam 20 can form a three-dimensional stable system, which can jointly perform lifting operations and multi-dimensional adjustments to the lifting status of large equipment such as steam turbine cylinders, generator stators, and exciters. Based on this, the structure, lifting capacity, and load capacity of the large equipment lifting device can be optimized. By evenly distributing the load among the four sling assemblies 30, the load range and applicability of the large equipment lifting device can be expanded. The adjustment dimensions of the lifting status of large equipment can be increased, making it easier to achieve precise adjustment of the lifting status of large equipment, and improving the dynamic stability, reliability, and safety of the lifting operation.

[0086] Please see Figure 1 , Figure 2 In some embodiments of this application, the lower side of the lifting beam 20 is provided with a first connecting part 21 corresponding to the sling assembly 30, and the lifting ring 31 is connected to the corresponding first connecting part 21.

[0087] By adopting the above scheme, the lifting ring 31 of each sling assembly 30 can be precisely aligned and connected to the independent first connecting part 21, and fixed to the lifting beam 20. Based on this, the assembly accuracy, assembly convenience, and assembly efficiency between the sling assembly 30 and the lifting beam 20 can be improved. The distribution of each sling assembly 30 relative to the lifting beam 20 can be precisely planned, which can promote uniform distribution of stress points, reduce local stress concentration caused by misalignment or offset of the sling assembly 30, enhance the stability and rigidity of the overall structure of the large equipment lifting device, and improve the reliability and service life of the large equipment lifting device.

[0088] Of course, in other embodiments, the first connecting part 21 may be omitted from the lifting beam 20, and the lifting ring 31 may be directly or indirectly connected to the lifting beam 20.

[0089] Please see Figure 1 , Figure 2 In some embodiments of this application, the upper side of the lifting beam 20 is provided with two second connecting parts 22. The two second connecting parts 22 are arranged at intervals along the length direction x of the lifting beam 20 and are symmetrically distributed about the central axis L of the lifting beam 20. The two second connecting parts 22 are respectively connected to the crane hook 60 through the crane sling 50.

[0090] By adopting the above scheme, the upper side of the lifting beam 20 can be conveniently, quickly, and reliably connected to the crane hook 60 via two symmetrically arranged connecting parts and the crane slings 50, thus facilitating the lifting and moving of the lifting beam 20 (and each sling assembly 30 and large equipment). Furthermore, since the two second connecting parts 22 are arranged at intervals along the length x of the lifting beam 20 and symmetrically distributed about the central axis L of the lifting beam 20, the crane hook 60, the two crane slings 50, and the two second connecting parts 22 can form a stable triangular structure. This allows the tension of the crane hook 60 to be evenly transmitted to the lifting beam 20, reducing the risk of torsion due to uneven load on the lifting beam 20, and reducing swaying and swinging of the lifting beam 20 during lifting and moving, thereby improving the dynamic stability, reliability, and safety of the lifting operation.

[0091] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A large equipment hoisting device, characterized in that, include: Control system; Hanging beam; The sling assembly is provided in multiple parts, all of which are connected to the lower side of the lifting beam. The sling assembly includes a lifting ring, a hydraulic cylinder and a lifting device connected in sequence from top to bottom. The hydraulic cylinder is connected to the control system and can automatically extend and retract to adjust its length under the control of the control system. Inclinometer, which is used to be installed on the upper side of large equipment, and the inclinometer is connected to the control system for signal transmission.

2. The large equipment hoisting device as described in claim 1, characterized in that, The hydraulic cylinder is configured to monitor the load.

3. The large equipment hoisting device as described in claim 1, characterized in that, The sling assembly is provided in two parts, and the inclinometer is a unidirectional inclinometer.

4. The large equipment hoisting device as described in claim 1, characterized in that, The sling assembly has at least three parts, and the inclinometer is a bidirectional inclinometer.

5. The large equipment hoisting device as described in claim 1, characterized in that, The inclinometer has an accuracy of 0.001°; And / or, the resolution of the inclinometer is 0.0005°; And / or, the response frequency of the inclinometer is 20Hz; And / or, the inclinometer has a measurement range of -10° to 10°.

6. The large equipment hoisting device as described in claim 1, characterized in that, The suspension cable assembly is provided in two parts, which are arranged at intervals along the length of the suspension beam and are symmetrically distributed about the central axis of the suspension beam.

7. The large equipment hoisting device as described in claim 1, characterized in that, The suspension cable assembly is provided in four parts, and the four suspension cable assemblies are distributed in a matrix array about the central axis of the suspension beam.

8. The large equipment hoisting device as described in any one of claims 1-7, characterized in that, The lower side of the lifting beam is provided with a first connecting part that corresponds to the lifting cable assembly, and the lifting ring is connected to the corresponding first connecting part.

9. The large equipment hoisting device as described in any one of claims 1-7, characterized in that, The upper side of the lifting beam is provided with two second connecting parts. The two second connecting parts are arranged at intervals along the length direction of the lifting beam and are symmetrically distributed about the central axis of the lifting beam. The two second connecting parts are respectively connected to the crane hook through the crane sling.

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