A high-strength adjustable lifting tool for lifting a million-unit equipment

Abstract

The utility model discloses a high strength adjustable lifting appliance for million unit equipment hoist, include: main frame, sling connecting piece, main girder, mobile trolley frame subassembly, lifting hook subassembly. Through above -mentioned mode, the utility model discloses a high strength adjustable lifting appliance for million unit equipment hoist, realizes the movement of the lifting point through two groups of independent mobile trolley frame subassembly, makes lifting point adjustment more convenient and efficiency, realizes the convenient safe reliable lifting point dismounting connection through lifting hook subassembly, has simplified the lifting appliance structure, has saved the time of hoisting operation greatly, has improved work efficiency and hoisting operation safety factor.

Description

Technical Field

[0001] This utility model relates to the field of hoisting equipment technology, and in particular to a high-strength adjustable hoisting tool for hoisting equipment in million-kilowatt units. Background Technology

[0002] The lifting of all major equipment, such as ultra-supercritical units, is carried out by special lifting tools. Currently, traditional special lifting tools have two main load-bearing points in the middle that can be finely adjusted, and four lifting holes at each end of the lifting tool. At each end of the main load-bearing points, there is an adjustable frame. Its main function is to lift high-pressure rotors, medium-pressure rotors, low-pressure rotors, and low-pressure outer cylinders, etc.

[0003] However, traditional lifting devices still have problems such as inconvenient adjustment of lifting points and inconvenient connection with equipment lifting points, specifically:

[0004] 1. Inconvenient adjustment: Due to the deviation in the center position of the high, medium, and low-pressure rotors, each time a different rotor is lifted, the frames at both ends of the lifting device need to be adjusted to adapt to the center requirements of the rotor and the lifting device. This adjustment method requires leveling the lifting device, using a hand-operated hoist attached to the small hook of the machine room crane to lift the frame, and then pushing and pulling manually. This is time-consuming and labor-intensive. Moreover, during lifting operations at the unit maintenance site, the long adjustment time will significantly impact efficiency.

[0005] 2. Poor Safety: The low-pressure rotor weighs 110 tons and uses a ring-shaped steel wire rope with a diameter of Φ65mm, a length of 19 meters, and a weight of approximately 300kg. When installing the wire rope on the low-pressure rotor, it is impossible for 1-2 crane operators to attach the wire rope to the lifting point of the hoisting device. Therefore, during the construction of the megawatt-scale unit, the construction unit welded two platforms to the left and right of the special hoisting device and then arranged 4 crane operators on the platforms to manually pull the wire rope to the lifting lugs of the hoisting device. However, the operators could not get down from the hoisting device, leading to a safety hazard and violating the ten prohibitions on lifting operations. Furthermore, when lifting the connecting pipe, the lifting point on the hoisting device is directly connected to the lifting lug on the connecting pipe. Crane operators need to work at height and set up lifting points below the hoisting device, which greatly increases the risk of falls from height and collisions with the hoisting device, also leading to safety hazards.

[0006] 3. Based on past experience in troubleshooting and maintenance of the 1,000 MW units, it was found that the special lifting tool for lifting the connecting pipe and the connecting pipe is connected to the connecting pipe using a special lifting plate. This is very inconvenient when connecting to the lifting point. Firstly, it is a high-altitude operation, and secondly, at least two people must be present to operate the connection, which poses a high safety risk. Utility Model Content

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A high-strength adjustable lifting device for hoisting equipment in megawatt-scale power plants is provided, comprising: a main frame, sling connectors, a main beam, a mobile frame assembly, and a hook assembly. The main frame is fixedly connected to the center of the main beam, and several sling connectors are provided on both sides of the main frame for connecting or fixing lifting slings. Two independent sets of mobile frame assemblies are movably connected to the main beams on both sides of the main frame to adjust the position or spacing of the two sets of mobile frame assemblies. A set of hook assemblies is connected to the bottom of each set of mobile frame assemblies.

[0009] The mobile frame assembly includes a frame body, a drive motor, a rack, a drive gear, and movable rollers. The frame body has a connecting slot that is movably connected to the main beam. Several movable rollers are rotatably connected to both sides of the connecting slot. The movable rollers contact and are movably connected to the bottom surface of the movable connecting slot on the side of the main beam, allowing them to roll back and forth within the slot. A rack is fixedly installed at the top and / or bottom of the movable connecting slot. The drive motor is fixedly connected to the frame body and drives the drive gear within the movable connecting slot to rotate. The drive gear meshes with the rack, causing the frame body to move back and forth on the main beam under the action of the drive gear and the rack.

[0010] The hook assembly includes a T-screw, an anti-detachment disc, a main hook, and a main load-bearing nut. The top two sides of the T-screw are fixedly connected to the vehicle frame body. The main hook is movably connected to the smooth rod of the T-screw, allowing the main hook to rotate on the T-screw. A set of upward-facing mounting slots are symmetrically arranged on the main hooks on both sides of the T-screw for mounting lifting slings. The anti-detachment disc is movably connected to the T-screw above the main hook to close the opening of the mounting slot under its own weight or external elastic force. The bottom of the T-screw is detachably connected to the main load-bearing nut to support the main hook.

[0011] In a preferred embodiment of this utility model, the cross-section of the main beam is an I-shaped structure.

[0012] In a preferred embodiment of this utility model, the main frame and the main beam are an integral structure.

[0013] In a preferred embodiment of this utility model, the two sets of drive motors are arranged opposite to each other on both sides of the main beam.

[0014] In a preferred embodiment of the present invention, a movable connecting groove is provided on each side of the main beam. The movable connecting groove includes a first movable connecting groove and a second movable connecting groove that are parallel to each other. The drive gear and rack of one set of movable frame assemblies are located in the first movable connecting groove, and the drive gear and rack of another set of movable frame assemblies are located in the second movable connecting groove.

[0015] In a preferred embodiment of the present invention, one or more movable rollers are provided in both the first movable connecting groove and the second movable connecting groove.

[0016] In a preferred embodiment of the present invention, an end plate is detachably connected to each end of the top of the main hook, and the end plate abuts against the frame body.

[0017] In a preferred embodiment of this utility model, the main load-bearing nut is threaded to the bottom of the T-shaped screw, and the top surface of the main load-bearing nut is in contact with the bottom surface of the main hook.

[0018] In a preferred embodiment of this utility model, the anti-detachment hook disc is movably connected to the T-shaped screw via a spring, so that the anti-detachment hook disc moves downward and resets under the action of elastic force.

[0019] In a preferred embodiment of the present invention, a controller is also included. The controller is communicatively connected to the drive motors in the two sets of mobile frame assemblies to control the start and stop of the drive motors.

[0020] The beneficial effects of this utility model are: the movement of the lifting point is realized by two sets of independent mobile frame components, making the adjustment of the lifting point more convenient and efficient; the lifting point is conveniently, safely and reliably disassembled and connected by the hook component, which simplifies the lifting device structure, greatly saves the time of lifting operation, and improves work efficiency and the safety factor of lifting operation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0022] Figure 1 This is a schematic diagram of a preferred embodiment of a high-strength adjustable lifting tool for hoisting equipment in a megawatt generator unit according to the present invention;

[0023] Figure 2 This is a first cross-sectional structural schematic diagram of a preferred embodiment of a high-strength adjustable lifting tool for hoisting equipment in a megawatt-scale power plant;

[0024] Figure 3 This is a second cross-sectional structural schematic diagram of a preferred embodiment of a high-strength adjustable lifting tool for hoisting equipment in a megawatt generator unit according to the present invention. Detailed Implementation

[0025] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Please see Figure 1-3 The embodiments of this utility model include:

[0027] To address the issues of inconvenient lifting point adjustment and difficulty in connecting with equipment lifting points, this application removes the adjustment mechanism from the original dedicated lifting tool and adds a high-strength adjustable lifting tool capable of bearing 120 tons (based on the weight of the low-pressure rotor). Its structure includes: main frame 1, sling connector 2, main beam 3, mobile frame assembly 4, and hook assembly 5.

[0028] The main frame is fixedly connected to the center of the main beam, and several sling connectors are provided on both sides of the main frame for connecting or fixing the slings (steel wire ropes, connected to the main hook of the crane) for lifting. Two sets of mobile frame assemblies are movably connected to the main beams on both sides of the main frame, and the two sets of mobile frame assemblies are arranged opposite each other on both sides of the main beam to improve the balance and stability of the equipment operation. The two sets of mobile frame assemblies can move independently to adjust the distance between the two sets of mobile frame assemblies. A set of hook assemblies is connected to the bottom of each set of mobile frame assemblies.

[0029] In some embodiments of this application, the main beam has an I-shaped cross-section.

[0030] In some embodiments of this application, the main frame and the main beam are an integral structure, or the main frame and the main beam are welded together.

[0031] The mobile frame assembly 4 includes a frame body 41, a drive motor 42, a rack 43, a drive gear 44, and a moving roller 45.

[0032] The frame body is provided with a connecting slot 46, which is movably connected to the main beam, so that the frame body is fitted onto the main beam. The side of the main beam is provided with a movable connecting slot 47, and several movable rollers are rotatably connected to the two side walls of the connecting slot. The movable rollers are movably connected to the bottom surface of the movable connecting slot, so that the movable rollers can roll back and forth in the movable connecting slot to reduce the frictional resistance when the frame body moves, thereby realizing the smooth movement of the frame body. A rack is fixedly provided at the top and / or bottom of the movable connecting slot on the main beam. The drive motor is fixedly connected to the frame body, and its output end extends through the frame body into the movable connecting slot and is connected to the drive gear in the movable connecting slot to drive the drive gear to rotate. The drive gear meshes with the rack, so that the frame body can move back and forth on the main beam under the action of the drive gear and the rack.

[0033] In some embodiments of this application, a movable connecting groove is provided on each side of the main beam, namely a first movable connecting groove and a second movable connecting groove that are parallel to each other. The drive gear and rack in one set of movable frame assemblies are located in the first movable connecting groove, and the drive gear and rack in another set of movable frame assemblies are located in the second movable connecting groove.

[0034] In some embodiments of this application, one or more movable rollers are provided in both the first movable connecting groove and the second movable connecting groove.

[0035] The hook assembly 5 includes a T-screw 51, an anti-disengagement disc 52, a main hook 53, and a main load-bearing nut 54.

[0036] The top two sides of the T-screw are fixedly connected to the vehicle frame body. The main hook is movably connected to the bare rod part of the T-screw, allowing the main hook to rotate on the T-screw according to actual usage requirements. A set of upward-facing mounting slots 56 are symmetrically arranged on the main hooks on both sides of the T-screw. Anti-disengagement discs are movably connected to the T-screw above the main hooks to close the openings of the mounting slots, preventing slings or other products from coming out of the mounting slots and improving the safety of lifting. A main load-bearing nut is threaded to the bottom of the T-screw and is located below the main hook to support it.

[0037] In some embodiments of this application, an end plate 55 is detachably connected to each end of the top of the main hook, and the end plate abuts against the frame body.

[0038] In some embodiments of this application, a controller is also included, which is communicatively connected to the drive motors in the two sets of mobile frame assemblies to control the start and stop of the drive motors.

[0039] In some embodiments of this application, the anti-detachment disc is movably connected to the T-screw via a spring, so that the anti-detachment disc can move downwards to reset under the action of the spring, thereby blocking the mounting groove.

[0040] When using this product, first install the high-strength adjustable lifting device of this application on the main hook of the gantry crane, then determine the size of the product to be lifted, and the drive motor adjusts the position and spacing of the two sets of moving frame components according to the size information to match the product or product lifting platform. Then, use steel cables and other devices to install them in the mounting groove, and use anti-detachment discs to press the opening of the mounting groove to prevent the steel cables from coming out. Finally, fix the lower end of the steel cables to the product lifting platform.

[0041] Load test: A total of 6 counterweights of 10 tons and 6 counterweights of 5 tons were used, plus the weight of the product lifting platform of 5 tons, for a total load of approximately 95 tons. The load test lasted for 10 minutes. During the test, the bending degree of the special lifting tool was measured, and no problems were found.

[0042] Effect Comparison: According to the requirements, the disassembly and lifting work of the connecting pipe, low-pressure outer cylinder and low-pressure inner cylinder was carried out. After using the high-strength adjustable lifting tool of this application, the lifting points on both sides of the frame were controlled separately by using an external power supply, so that the movement of the lifting points was fully automated and remote controlled, thus completely solving the problem of inconvenient lifting point adjustment.

[0043] When lifting the connecting pipe, a 15-ton hand-operated hoist was used for adjustment on the steam side, and a short ring rope and shackles were used for direct connection on the electric side. The connection between the lifting points of the equipment and the lifting points of the lifting tools was also relatively convenient and reliable.

[0044] When lifting the main equipment, the high-strength adjustable lifting tool of this application can greatly save lifting time, improve work efficiency, and increase the safety factor of lifting operations. The improvement of the special lifting tool has achieved significant results.

[0045] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-strength adjustable lifting tool for hoisting equipment in a megawatt-scale power plant, characterized in that, include: The system comprises a main frame, sling connectors, a main beam, a mobile frame assembly, and a hook assembly. The main frame is fixedly connected to the center of the main beam, and several sling connectors are provided on both sides of the main frame for connecting or securing lifting slings. Two independent sets of mobile frame assemblies are movably connected to the main beams on both sides of the main frame to adjust the position or spacing of the two sets of mobile frame assemblies. Each set of mobile frame assemblies has a hook assembly connected to its bottom. The mobile frame assembly includes a frame body, a drive motor, a rack, a drive gear, and movable rollers. The frame body has a connecting slot that is movably connected to the main beam. Several movable rollers are rotatably connected to both sides of the connecting slot. The movable rollers contact and are movably connected to the bottom surface of the movable connecting slot on the side of the main beam, allowing them to roll back and forth within the slot. A rack is fixedly installed at the top and / or bottom of the movable connecting slot. The drive motor is fixedly connected to the frame body and drives the drive gear within the movable connecting slot to rotate. The drive gear meshes with the rack, causing the frame body to move back and forth on the main beam under the action of the drive gear and the rack. The hook assembly includes a T-bolt, an anti-detachment disc, a main hook, and a main load-bearing nut. The top two sides of the T-bolt are fixedly connected to the vehicle frame body. The main hook is movably connected to the smooth rod of the T-bolt, allowing the main hook to rotate on the T-bolt. A set of upward-facing mounting slots are symmetrically arranged on the main hooks on both sides of the T-bolt for mounting lifting slings. The anti-detachment disc is movably connected to the T-bolt above the main hook to close the opening of the mounting slot under its own weight or external elastic force. The bottom of the T-bolt is detachably connected to the main load-bearing nut to support the main hook.

2. The high-strength adjustable lifting tool for hoisting equipment in a megawatt-scale power plant as described in claim 1, characterized in that, The main beam has an I-shaped cross-section.

3. The high-strength adjustable lifting tool for hoisting equipment in a megawatt-scale power plant as described in claim 1, characterized in that, The main frame and the main beam are an integral structure.

4. The high-strength adjustable lifting tool for hoisting equipment in a megawatt-scale power plant as described in claim 1, characterized in that, The two sets of drive motors are arranged opposite each other on both sides of the main beam.

5. A high-strength adjustable lifting tool for hoisting equipment in a megawatt-scale power plant, as described in claim 1, is characterized in that... Each side of the main beam is provided with a movable connecting groove, which includes a first movable connecting groove and a second movable connecting groove that are parallel to each other. The drive gear and rack of one set of movable frame assemblies are located in the first movable connecting groove, and the drive gear and rack of another set of movable frame assemblies are located in the second movable connecting groove.

6. A high-strength adjustable lifting tool for hoisting equipment in a megawatt-scale power plant, as described in claim 5, is characterized in that... One or more movable rollers are provided in both the first and second movable connecting slots.

7. A high-strength adjustable lifting tool for hoisting equipment in a megawatt-scale power plant, as described in claim 1, is characterized in that... Each end plate is detachably connected to both ends of the top of the main hook, and the end plates abut against the frame body.

8. A high-strength adjustable lifting tool for hoisting equipment in a megawatt-scale power plant, as described in claim 1, is characterized in that... The main load-bearing nut is threaded to the bottom of the T-shaped screw, and the top surface of the main load-bearing nut is in contact with the bottom surface of the main hook.

9. A high-strength adjustable lifting tool for hoisting equipment in a megawatt-scale power plant, as described in claim 1, is characterized in that... The anti-detachment hook disc is movably connected to the T-screw via a spring, allowing the anti-detachment hook disc to move downwards and reset under the action of elastic force.

10. A high-strength adjustable lifting tool for hoisting equipment in a megawatt-scale power plant according to claim 1, characterized in that, It also includes a controller, which is communicatively connected to the drive motors in the two sets of mobile frame assemblies to control the start and stop of the drive motors.

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