A lifting device for marine steam turbine

Abstract

The present invention relates to the technical field of steam turbine hoisting and disassembly, and particularly to a lifting device for a marine steam turbine. In order to solve the problem of lack of a crane or other lifting equipment when opening a cylinder for maintenance on a ship or in a confined space, the bottoms of four threaded guide pins in this solution are all connected to the lower half of the outer cylinder of the marine steam turbine, the threaded guide pins are threadedly connected to the threaded guide sleeves, a ratchet wrench set is fixed to the outside of the threaded guide sleeves, each end of a crossbeam is located above a threaded guide sleeve and is sleeved on a threaded guide pin, the crossbeam is arranged normal to the rotor axis of the marine steam turbine, the crossbeam is used to connect the upper half of the outer cylinder of the marine steam turbine, the inner cylinder bracket is used to connect the upper half of the outer cylinder of the marine steam turbine and the upper half of the inner cylinder of the marine steam turbine, and the middle part of the crossbeam is connected to a hanger for connecting the rotor of the marine steam turbine. This solution can lift the inner and outer cylinder upper halves and rotors of power equipment with a horizontal center plane, such as a steam turbine, an air compressor, and a reducer, in steps to inspect, repair, and reinstall components.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine hoisting and disassembly, and in particular to a lifting device for a marine steam turbine. Background Art

[0002] Generally, large-scale power machinery used on ships or in confined spaces requires regular maintenance during use, and the cylinders need to be opened for inspection or repair. Due to the limited space on the ship, conventional disassembly conditions are not available when the cylinders are opened and disassembled. Land-based power equipment can be equipped with cranes and other lifting equipment in the internal space of the factory to open the cylinders. When opening the cylinders for inspection and repair on ships and in confined spaces, there are no cranes and other lifting equipment, and other methods or devices need to be considered for disassembly, inspection, reinstallation and other operations. Summary of the Invention

[0003] The purpose of the patent of this invention: The invention is to solve the problem of no lifting equipment such as crane when repairing and opening cylinders on board ships and in confined spaces. The invention provides a lifting device for marine steam turbines.

[0004] The object of the present invention is achieved as follows: A lifting device for a marine steam turbine comprises two crossbeams, two hangers, four threaded guide pins, four threaded guide sleeves, four ratchet wrenches and a plurality of inner cylinder brackets;

[0005] The bottoms of the four threaded guide pins are connected to the lower half of the outer cylinder of the marine steam turbine, the threaded guide pins are threadedly connected to the threaded guide sleeves, the ratchet wrench set is fixed to the outside of the threaded guide sleeves, each end of the crossbeam is located above a threaded guide sleeve and is sleeved on a threaded guide pin, the crossbeam is arranged normal to the rotor axis of the marine steam turbine, the crossbeam is used to connect the upper half of the outer cylinder of the marine steam turbine, the inner cylinder bracket is used to connect the upper half of the outer cylinder of the marine steam turbine and the upper half of the inner cylinder of the marine steam turbine, each hanger is connected to the middle of a crossbeam, and the hanger is used to connect the rotor of the marine steam turbine.

[0006] Furthermore, the threaded guide pin is provided with a scale.

[0007] Furthermore, the lifting device further comprises four guide columns;

[0008] The guide post is used to pass through the positioning hole on the upper half of the outer cylinder of the marine steam turbine and then be fixed on the lower half of the outer cylinder of the marine steam turbine.

[0009] Furthermore, an outer cylinder bracket is connected to the side of the crossbeam, and the outer cylinder bracket is used to be connected and fixed to the upper half of the outer cylinder of the marine steam turbine.

[0010] Furthermore, a key is provided between the outer cylinder bracket and the upper half of the outer cylinder of the marine steam turbine.

[0011] Furthermore, the lifting device also includes four support columns installed between the upper half of the outer cylinder of the marine steam turbine and the lower half of the outer cylinder of the marine steam turbine to play a supporting role.

[0012] Beneficial effects:

[0013] This invention addresses the need for large-scale power machinery used on ships and in limited space. It can lift the upper halves of the inner and outer cylinders and rotors of power equipment with horizontal center planes, such as steam turbines, air compressors, and speed reducers, step by step, allowing for inspection, repair, and reinstallation of components. It ensures practical safety, a compact structure, and strong operability. It also features easy installation, simple operation, and a small footprint.

[0014] This solution has a compact structure and is suitable for disassembling and assembling rotating mechanical equipment with a horizontal center dividing surface in a small and confined space. It occupies a small amount of space to complete the disassembly of the equipment housing and internal rotor and other components, making it easy to inspect, maintain and replace internal parts of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a marine steam turbine lifting device holding up the upper halves of the inner and outer cylinders of the present invention;

[0016] Figure 2 This is a schematic diagram of a marine steam turbine rotor supported by a lifting device according to the present invention;

[0017] Figure 3 This invention Figure 2 A / B view.

[0018] In the figure: 1. Upper half of the outer cylinder of a marine steam turbine; 2. Upper half of the inner cylinder of a marine steam turbine; 3. Outer cylinder bracket; 4. Ratchet wrench; 5. Threaded guide sleeve; 6. Inner cylinder bracket; 7. Rotor of a marine steam turbine; 8. Support column; 9. Threaded guide column; 10. Lower half of the outer cylinder of a marine steam turbine; 14. Key; 18. Guide column; 19. Crossbeam; 20. Hanger. DETAILED DESCRIPTION

[0019] Specific embodiment 1: A lifting device for a marine steam turbine, comprising two cross beams 19, two hangers 20, four threaded guide pins 9, four threaded guide sleeves 5, four ratchet wrenches 4 and a plurality of inner cylinder brackets 6;

[0020] The bottoms of the four threaded guide pins 9 are connected to the lower half 10 of the outer cylinder of the marine steam turbine. The threaded guide pins 9 are threadedly connected to the threaded guide sleeve 5. The ratchet wrench 4 is fixed to the outside of the threaded guide sleeve 5. Each end of the crossbeam 19 is located above a threaded guide sleeve 5 and is mounted on a threaded guide pin 9. The crossbeam 19 is arranged normal to the rotor axis of the marine steam turbine. The crossbeam 19 is used to connect the upper half 1 of the outer cylinder of the marine steam turbine. The inner cylinder bracket 6 is used to connect the upper half 1 of the outer cylinder of the marine steam turbine and the upper half 2 of the inner cylinder of the marine steam turbine. Each hanger 20 is connected to the middle part of a crossbeam 19. The hanger 20 is used to connect the rotor 7 of the marine steam turbine.

[0021] In this embodiment: the height of the threaded guide sleeve is adjusted by a ratchet wrench to determine the height of the crossbeam. The crossbeam is connected to the upper half of the outer cylinder of the marine steam turbine for lifting. After the upper half of the outer cylinder of the marine steam turbine is lifted, the inner cylinder bracket is used to connect the upper half of the outer cylinder of the marine steam turbine and the upper half of the inner cylinder of the marine steam turbine to complete the lifting of the upper half of the inner cylinder of the marine steam turbine. Each hanger is connected to the middle part of a crossbeam, and the hanger is used to connect the rotor of the marine steam turbine.

[0022] Specific embodiment 2: A lifting device for a marine steam turbine, wherein the threaded guide column 9 is provided with a scale.

[0023] In this embodiment, a scale is provided on the threaded guide pin to ensure that the height of the threaded guide pin is consistent after installation, and the position of the threaded guide sleeve can be observed.

[0024] Other implementations are the same as the first specific implementation.

[0025] Specific embodiment three: A lifting device for a marine steam turbine, the lifting device further comprising four guide columns 18;

[0026] The guide post 18 is used to pass through the positioning hole of the upper half 1 of the outer cylinder of the marine steam turbine and then be fixed on the lower half 10 of the outer cylinder of the marine steam turbine.

[0027] In this embodiment, the guide post is used to pass through the positioning hole in the upper half of the outer cylinder of the marine steam turbine and then be fixed to the lower half of the outer cylinder of the marine steam turbine. The guide post ensures that the outer cylinder moves up and down along the guide post, acting as a guide. The guide post passes through the positioning hole in the upper half of the outer cylinder and is screwed into the threaded hole in the lower half of the outer cylinder and tightened.

[0028] Other implementations are the same as the first specific implementation.

[0029] Specific embodiment 4: A lifting device for a marine steam turbine, the side of the crossbeam 19 is connected to the outer cylinder bracket 3, and the outer cylinder bracket 3 is used to be connected and fixed to the upper half 1 of the outer cylinder of the marine steam turbine.

[0030] In this embodiment, the side of the crossbeam is connected to an outer cylinder bracket, which is used to be connected and fixed to the upper half of the outer cylinder of the marine steam turbine. The synchronous operation of the two outer cylinder brackets can ensure that the upper half of the outer cylinder of the marine steam turbine is lifted steadily.

[0031] Other implementations are the same as the first specific implementation.

[0032] Specific embodiment 5: A lifting device for a marine steam turbine, wherein a key 14 is installed between the outer cylinder bracket 3 and the upper half 1 of the outer cylinder of the marine steam turbine.

[0033] In this embodiment, a key is installed between the outer cylinder bracket and the upper half of the outer cylinder of the marine steam turbine. The key connection has the characteristics of reliable operation and convenient assembly and disassembly, and is widely used.

[0034] Other implementations are the same as the first specific implementation.

[0035] Specific embodiment 6: A lifting device for a marine steam turbine, the lifting device further comprising four support columns 8 installed between the upper half 1 of the outer cylinder of the marine steam turbine and the lower half 10 of the outer cylinder of the marine steam turbine to play a supporting role.

[0036] In this embodiment, after the upper half of the outer cylinder of the marine steam turbine is hoisted, a support column is installed between it and the lower half of the outer cylinder of the marine steam turbine to facilitate later personnel to enter for maintenance.

[0037] Other implementations are the same as the first specific implementation.

[0038] Working process:

[0039] When the rotating equipment needs to open the cylinder, first pass the guide post through the positioning hole in the upper half of the outer cylinder and screw it into the threaded hole in the lower half of the outer cylinder and tighten it. The guide post ensures that the outer cylinder moves up and down along the guide post, acting as a guide. Then, install and connect the four threaded guide posts with scales to the corresponding positions of the lower half of the equipment outer cylinder body with bolts. Then, install the threaded guide sleeves and crossbeams on the threaded guide posts in sequence. Then, use four sets of ratchet wrenches to adjust the threaded guide sleeves to the height that can connect the outer cylinder bracket with the outer cylinder interface. Then, insert the key, tighten the bolts, and simultaneously turn the four sets of ratchet wrenches clockwise to lift the outer cylinder. Then rotate the ratchet wrenches to the desired height. After the height is reached, connect the inner cylinder and the outer cylinder through the inner cylinder bracket. Simultaneously turn the four ratchet wrenches clockwise to lift the outer cylinder and the inner cylinder upper half. After reaching a certain height, install the support post between the lower and upper halves of the outer cylinder body and secure them with bolts to support the inner and outer cylinder upper halves.

[0040] When the rotor needs to be lifted, the rotor hanger and other related components can be fixed to the beam interface, and then the lower half ring of the rotor hanger can be removed and installed on the lower half of the rotor. The four ratchet wrenches are synchronously rotated counterclockwise to lower the rotor hanger to the corresponding height, and the lower half ring of the rotor hanger is connected to the upper half ring with bolts. The four ratchet wrenches are synchronously rotated clockwise to lift the rotor to a corresponding height, so that the internal parts of the rotating equipment can be inspected and parts can be replaced.

Claims

1. A lifting device for a marine steam turbine, characterized in that: It comprises two crossbeams (19), two hangers (20), four threaded guide pins (9), four threaded guide sleeves (5), four ratchet wrenches (4) and a plurality of inner cylinder brackets (6); The bottoms of four threaded guide pins (9) are connected to the lower half (10) of the outer cylinder of the marine steam turbine. The threaded guide pins (9) are threadedly connected to the threaded guide sleeve (5). The ratchet wrench (4) is fixed to the outside of the threaded guide sleeve (5). Each end of the crossbeam (19) is located above a threaded guide sleeve (5) and is mounted on a threaded guide pin (9). The crossbeam (19) is arranged normal to the rotor axis of the marine steam turbine. The crossbeam (19) is used to connect the upper half (1) of the outer cylinder of the marine steam turbine. The inner cylinder bracket (6) is used to connect the upper half (1) of the outer cylinder of the marine steam turbine and the upper half (2) of the inner cylinder of the marine steam turbine. Each hanger (20) is connected to the middle of a crossbeam (19). The hanger (20) is used to connect the rotor (7) of the marine steam turbine.

2. A marine steam turbine lifting device according to claim 1, characterized in that: The threaded guide pin (9) is provided with a scale.

3. A marine steam turbine lifting device according to claim 1, characterized in that: The lifting device further comprises four guide columns (18); The guide post (18) is used for passing through a positioning hole of an upper half (1) of an outer cylinder of a marine steam turbine and then being fixed on a lower half (10) of an outer cylinder of the marine steam turbine.

4. A marine steam turbine lifting device according to claim 1, characterized in that: The side of the crossbeam (19) is connected with an outer cylinder bracket (3), and the outer cylinder bracket (3) is used for being connected and fixed with the upper half (1) of the outer cylinder of the marine steam turbine.

5. The marine steam turbine lifting device according to claim 1, characterized in that: A key (14) is arranged between an outer cylinder bracket (3) and an upper half (1) of an outer cylinder of a marine steam turbine.

6. The marine steam turbine lifting device according to claim 1, characterized in that: The lifting device also includes four support columns (8) installed between the upper half (1) of the outer cylinder of the marine steam turbine and the lower half (10) of the outer cylinder of the marine steam turbine to play a supporting role.

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