Lifting hook device

Abstract

A lifting hook device relates to the technical field of cranes and comprises a pulley block, an annular lifting beam, a connecting beam and a hook head, pulley blocks are mounted on the two sides of the top of the annular hanging beam; a guide copper sleeve is arranged in a center hole of the annular hanging beam, and a pin shaft hole penetrating through the annular hanging beam and the guide copper sleeve is formed in one side of the annular hanging beam; the bottom of the annular hanging beam is detachably connected with a connecting beam; a hook head is hinged to the bottom of the connecting beam; when the gas turbine rotor is hoisted, the annular hoisting beam can be sleeved on the shaft body at one end of the gas turbine rotor, which is provided with the pin hole, and part of the shaft body of the gas turbine rotor is inserted into the central hole of the annular hoisting beam, so that the net hoisting height can be effectively increased, and the height requirement of a plant is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a hook device. Background Art

[0002] It is well known that when overhauling a gas turbine rotor in a power plant, the rotor disc needs to be removed and the gas turbine rotor needs to be lifted vertically, with a minimum lifting height of about 14 meters. The traditional lifting method is to install a special lifting device at one end of the gas turbine rotor with a pin hole and lift it vertically. Due to the large distance between the special lifting device and the hook, the lifting height increases, and some factory buildings do not meet the height requirements.

[0003] A Chinese patent (publication number: CN207618894U) discloses a rigid lifting tool for a hydro-generator rotor. The patent comprises two plate-type lifting ears arranged parallel to each other, each having a notch provided at the bottom of the two plate-type lifting ears, and a base that horizontally passes through the notches of the two plate-type lifting ears and is fixed to the plate-type lifting ears. A through hole is provided on the base in a vertical direction, and a retaining ring is provided at the upper end of the base. The rotor can be inserted into the through hole and extended to the upper end surface of the base to be locked by the retaining ring. Two load-bearing pins are provided at intervals and parallel to each other on the same horizontal plane above the two plate-type lifting ears. The main hook of the crane can drop between the two plate-type lifting ears and hook onto the load-bearing pins. The patent is a special lifting tool with a single function. The patent structure extends the height of the hydro-generator rotor during lifting, which has high requirements on the height of the factory building. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology, the utility model discloses a hook device.

[0005] In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solutions:

[0006] A hook device comprises a pulley block, an annular suspension beam, a connecting beam and a hook head; pulley blocks are installed on both sides of the top of the annular suspension beam; a guide copper sleeve is provided in the center hole of the annular suspension beam, and a pin shaft hole passing through the annular suspension beam and the guide copper sleeve is provided on one side of the annular suspension beam; the bottom of the annular suspension beam is detachably connected to the connecting beam, and the bottom of the connecting beam is hinged with a hook head.

[0007] Preferably, a horizontal flange is provided on the bottom edge of the guide copper sleeve, and a plurality of mounting holes are provided on the horizontal flange at intervals along the circumferential direction.

[0008] Preferably, a plurality of chains are detachably connected to the bottom of the annular suspension beam at intervals along the annular direction.

[0009] Preferably, both ends of the chain are connected with adjustable connecting devices, and the adjustable connecting devices include studs, the top of the studs are rotatably connected to a connecting column, and the connecting column is detachably connected to a shackle through a pin.

[0010] Preferably, a hexagonal structure is provided on the top of the stud shaft.

[0011] Preferably, a hanging plate is provided between the connecting beam and the hook head, one end of the hanging plate is hinged to the connecting beam, and the other end is hinged to the hook head.

[0012] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0013] The utility model discloses a hook device with a simple structure, easy to assemble, and capable of reducing production costs; a guide copper sleeve is provided in the center hole of the annular hanging beam, so that when hoisting the gas turbine rotor, the annular hanging beam can be sleeved on the shaft body at one end of the gas turbine rotor provided with a pin hole, and the pin hole of the gas turbine rotor is made coaxial with the pin shaft hole, and the gas turbine rotor can be lifted by inserting the pin shaft into the pin shaft hole; since part of the shaft body of the gas turbine rotor is inserted into the center hole of the annular hanging beam, the net lifting height can be effectively increased, thereby reducing the height requirement of the factory building.

[0014] The utility model further has a plurality of chains detachably connected to the bottom of the annular lifting beam along annular intervals. That is, when lifting the gas turbine rotor, in addition to inserting the pin shaft into the pin shaft hole, the annular lifting beam can be connected to the end plate of the gas turbine rotor shaft body through the chain to prevent the pin shaft from falling off accidentally, thereby achieving the purpose of double insurance.

[0015] The utility model further has adjustable connecting devices connected to both ends of the chain. The chain can be connected to the studs through shackles, and the tightness of the chain can be adjusted by adjusting the connection length between the studs and the annular hanging beam or the turbine rotor shaft end plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a side view of the utility model;

[0018] Figure 3 The schematic diagram of the structure of the guide copper sleeve;

[0019] Figure 4 This is a schematic diagram of the connection state of the utility model and the gas turbine rotor;

[0020] Figure 5 is a schematic structural diagram of an adjustable connecting device;

[0021] Figure 6 Schematic diagram of lifting the gas turbine rotor.

[0022] In the figure: 1. Pulley block; 2. Annular lifting beam; 3. Connecting beam; 4. Hook; 5. Guide copper sleeve; 6. Pin hole; 7. Chain; 8. Adjustable connecting device; 8-1. Stud; 8-2. Connecting column; 8-3. Shackle; 9. Hanging plate. DETAILED DESCRIPTION

[0023] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", and "right" indicating directions or positional relationships, they are only corresponding to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0024] Example 1, combined with the attached Figures 1 to 4 And 6, a hook device, comprising a pulley block 1, an annular suspension beam 2, a connecting beam 3 and a hook head 4; pulley blocks 1 are installed on both sides of the top of the annular suspension beam 2, that is, when in use, the wire rope of the crane lifting mechanism is correspondingly wound and connected with the two pulley blocks 1; a guide copper sleeve 5 is provided in the center hole of the annular suspension beam 2, and a pin shaft hole 6 is provided on one side of the annular suspension beam 2, which passes through the annular suspension beam 2 and the guide copper sleeve 5. When hoisting the gas turbine rotor, the annular suspension beam 2 can be sleeved on the shaft body of the gas turbine rotor with a pin hole, and the pin hole of the gas turbine rotor is made coaxial with the pin shaft hole 6. The gas turbine rotor can be lifted by inserting the pin shaft into the pin shaft hole 6; in the process of corresponding sleeve connection between the annular suspension beam 2 and the gas turbine rotor, the guide copper sleeve 5 can play a guiding role, and during the lifting process, the guide copper sleeve 5 can protect the shaft body of the gas turbine rotor to prevent damage to the shaft body of the gas turbine rotor.

[0025] It should be noted that the bottom edge of the guide copper sleeve 5 is provided with a horizontal flange, and the horizontal flange is provided with a plurality of mounting holes spaced apart along the circumference, as shown in the attached Figure 3 As shown, the horizontal flange and the bottom edge of the guide copper sleeve 5 can be smoothly connected, so that the annular suspension beam 2 can be easily mounted on the end of the gas turbine rotor with a pin hole; screws can be installed at the mounting holes on the horizontal flange to ensure that the guide copper sleeve 5 and the annular suspension beam 2 are correspondingly fastened.

[0026] It should be noted that when lifting the gas turbine rotor, part of the shaft of the gas turbine rotor is inserted into the central hole of the annular lifting beam 2, which can effectively increase the net lifting height and thus reduce the height requirement of the plant.

[0027] The bottom of the annular lifting beam 2 is detachably connected to a connecting beam 3, and a hook head 4 is hinged at the bottom of the connecting beam 3. When there is no need to lift the gas turbine rotor, the hook head 4 can be installed at the bottom of the annular lifting beam 2 through the connecting beam 3, thereby meeting the lifting needs of other heavy objects and effectively expanding the practicality. When it is necessary to lift the gas turbine rotor, it is only necessary to remove the connecting beam 3 without removing the pulley block 1 or adjusting the wire rope. It is convenient and quick to use, and effectively improves the working efficiency.

[0028] A hanging plate 9 is provided between the connecting beam 3 and the hook head 4. One end of the hanging plate 9 is hinged to the connecting beam 3, and the other end is hinged to the hook head 4, which effectively improves the degree of freedom of the hook head 4 so that the swing of the hook head 4 can be adjusted according to actual conditions during use.

[0029] Example 2: To further enhance safety, this example is further improved.

[0030] Combined with attachment Figures 4-5 A hook device is provided. The difference from Example 1 is that, based on Example 1, a plurality of chains 7 are detachably connected to the bottom of the annular beam 2 along the annular interval. That is, when lifting the gas turbine rotor, in addition to inserting the pin into the pin hole 6, the chain 7 can be used to connect the annular beam 2 to the end plate of the gas turbine rotor shaft body, thereby preventing the pin from falling off accidentally and achieving the purpose of double insurance.

[0031] In order to facilitate the consistency of tightness of multiple chains 7, adjustable connecting devices 8 are connected to both ends of the chain 7, and the adjustable connecting device 8 includes a stud 8-1, and the top of the stud 8-1 is rotatably connected to a connecting column 8-2, and the connecting column 8-2 is detachably connected to a shackle 8-3 through a pin, that is, the chain 7 can be connected to the stud 8-1 through the shackle 8-3, and the tightness of the chain 7 can be adjusted by adjusting the connection length between the stud 8-1 and the annular beam 2 or the turbine rotor shaft end plate; the top of the stud 8-1 rod is provided with a hexagonal structure, which can facilitate the screwing of the stud 8-1 with a wrench.

[0032] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A hook device, characterized by: The invention comprises a pulley block (1), an annular hanging beam (2), a connecting beam (3) and a hook head (4); the pulley blocks (1) are installed on both sides of the top of the annular hanging beam (2); a guide copper sleeve (5) is provided in the center hole of the annular hanging beam (2), and a pin hole (6) passing through the annular hanging beam (2) and the guide copper sleeve (5) is provided on one side of the annular hanging beam (2); the bottom of the annular hanging beam (2) is detachably connected to the connecting beam (3), and the bottom of the connecting beam (3) is hinged with a hook head (4).

2. The hook device according to claim 1, wherein: The bottom edge of the guide copper sleeve (5) is provided with a horizontal flange, and the horizontal flange is provided with a plurality of mounting holes spaced apart along the circumferential direction.

3. The hook device according to claim 1, wherein: The bottom of the annular hanging beam (2) is detachably connected to a plurality of chains (7) at intervals along the annular direction.

4. The hook device according to claim 3, wherein: Both ends of the chain (7) are connected to an adjustable connecting device (8), and the adjustable connecting device (8) comprises a stud (8-1), the top of the stud (8-1) is rotatably connected to a connecting column (8-2), and the connecting column (8-2) is detachably connected to a shackle (8-3) via a pin.

5. The hook device according to claim 4, wherein: The top of the stud (8-1) is provided with a hexagonal structure.

6. The hook device according to claim 1, wherein: A hanging plate (9) is provided between the connecting beam (3) and the hook head (4); one end of the hanging plate (9) is hinged to the connecting beam (3) and the other end is hinged to the hook head (4).

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