Lifting appliance for producing low-pressure rotor of steam turbine

Abstract

The utility model provides a lifting appliance for producing a low-pressure rotor of a steam turbine, which belongs to the technical field of steam turbine production and comprises a portal frame, an electric hoist, a cross beam, a fixed seat, a sling, a fastener, a bearing piece, a lifting rail, a sliding block, a rotating shaft, a swing rod and a connecting rope, the sling is arranged to penetrate through the through hole of the bearing piece from the bottom and then penetrate outwards to bypass the bearing piece, so that the bearing piece is attached to the bottom of the sling in an arc mode, the rectangular bearing piece is regular in shape, and the cross section area of the rectangular bearing piece is larger than that of the sling. The gravity sling is arranged on the bearing piece, the contact face between the bearing piece and the rotor can be increased, the bearing piece tightly presses and wraps the outer end of a rotating shaft of the rotor due to the fact that the gravity sling is stretched after being stressed during hoisting, the rotating shaft of the rotor is protected, and hoisting is safer.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine production, in particular to a hoisting device for producing a low-pressure rotor of a steam turbine. Background Art

[0002] The steam turbine rotor is the core component of the steam turbine. Its function is to convert the energy of steam into mechanical energy, thereby driving the power generation machinery and equipment. The steam enters the low-pressure rotor of the steam turbine to drive the rotor to rotate, thereby driving the generator or other mechanical equipment to operate;

[0003] During the production process, the low-pressure rotor of the steam turbine needs to be transported by hoisting;

[0004] It has been found in actual use that the existing hoisting equipment has the following deficiencies when hoisting the low-pressure rotor of the steam turbine:

[0005] The existing lifting equipment adopts a double-point lifting method to fix the slings during lifting, by connecting two sets of slings to the rotating shafts on both sides of the rotor. However, during the connection process, the contact surface between the slings and the rotor is small, which not only easily rotates during lifting, affecting the safety of lifting, but also easily damages the rotor due to friction.

[0006] Although the mass and center of gravity of the rotor are calculated in advance before hoisting to ensure that the rotor is balanced and stable during the hoisting process, the rotor will swing with the hoisting process. The operator can only observe with the naked eye and rely on experience to balance and adjust the hoisting process. Not only does it require constant attention to the safety of the crane, but it is also easy to make operating errors or improper hoisting, resulting in accidents and affecting the safety of the hoisting.

[0007] Therefore, the present application provides a sling for producing a low-pressure rotor of a steam turbine to meet the demand. Utility Model Content

[0008] The utility model aims to solve the problems existing in the above-mentioned background technology and proposes a hoisting device for producing a low-pressure rotor of a steam turbine.

[0009] The technical problem to be solved by the utility model is to provide a hoisting device for producing a low-pressure rotor of a steam turbine so as to solve the problems of the existing hoisting device for producing a low-pressure rotor of a steam turbine.

[0010] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0011] A hoist for producing low-pressure rotors of steam turbines, comprising: a gantry, an electric hoist, a crossbeam, a fixed seat, a sling, a fastener, a supporting plate, a hanging rail, a slider, a rotating shaft, a swing rod and a connecting rope, wherein the electric hoist is installed on the gantry, the lower end of the electric hoist is hoisted with a crossbeam, the beam frame of the crossbeam is installed with a fixed seat, the fixed seat is installed with a sling, the connecting part of the sling is installed with a fastener, the lower end of the sling is installed with a fastener, the lower end of the fastener is installed with a supporting plate, the middle of the lower end of the crossbeam is installed, the hanging rail is installed with a slider, the swing rod is installed at the inner lower end of the slider through a rotating shaft, and the lower end of the swing rod is bound with a connecting rope.

[0012] Preferably, rectangular grooves are provided at the left and right ends of the cross beam, and two groups of fixing seats are provided, and the two groups of fixing seats are respectively located at the left and right ends of the cross beam.

[0013] Preferably, the supporting piece is rectangular in shape as a whole, and the front and rear ends of the supporting piece are arc-shaped.

[0014] Preferably, the surface of the supporting plate is provided with four groups of circular through holes, and the sling passes through the through holes of the supporting plate from the bottom and then passes outwardly around the supporting plate.

[0015] Preferably, the supporting sheet is made of rubber.

[0016] Preferably, a slide groove is provided on the inner side of the slide block, and the slide block is slidably connected to the hanging rail.

[0017] Preferably, the swing rod is vertically mounted at the lower end of the slider, and the swing rod is movably connected to the slider via a rotating shaft.

[0018] Compared with the prior art, the utility model has at least the following beneficial effects:

[0019] 1. The sling passes through the through hole of the support sheet from the bottom and then passes through the support sheet outward, so that the support sheet fits the bottom of the sling in an arc shape. The rectangular support sheet is more regular in shape, and its cross-sectional area is larger than that of the sling, which can increase the contact surface between the support sheet and the rotor. During hoisting, the sling is stretched due to gravity, so that the support sheet is tightly wrapped around the outer end of the rotor shaft, providing protection for the rotor shaft, thereby making it safer during hoisting;

[0020] 2. When hoisting the rotor, the middle hanging rail is located directly above the rotor, and the connecting rope is tied to the middle of the rotor. As the center shifts when hoisting the rotor, the connecting rope can drive the swing rod to swing, which can facilitate the understanding of the amplitude of the center of gravity shift, and the swing of the swing rod can drive the slider to move horizontally on the hanging rail, so as to understand the direction of the center of gravity shift, and then facilitate the operator to make adjustments during hoisting, making lifting safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the specific connection structure of the sling and the supporting sheet of the utility model;

[0024] Figure 3 This is a schematic diagram of the supporting sheet structure of the utility model;

[0025] Figure 4 The utility model is a schematic diagram of the specific connection structure of the slider and the swing rod.

[0026] [reference numerals]

[0027] 1-gantry; 2-electric hoist; 3-crossbeam; 4-fixed seat; 5-sling; 6-fastener; 7-support plate; 8-hanging rail; 9-sliding block; 10-rotating shaft; 11-swing rod; 12-connecting rope; 901-slideway.

[0028] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 4 A kind of lifting equipment for producing low-pressure rotor of steam turbine is shown in the embodiment of the utility model, comprising: gantry 1, electric hoist 2, cross beam 3, fixed seat 4, sling 5, fastener 6, supporting plate 7, hanging rail 8, slider 9, rotating shaft 10, swing rod 11 and connecting rope 12, the electric hoist 2 is installed on the gantry 1, the lower end of the electric hoist 2 is hoisted with cross beam 3, the beam frame of the cross beam 3 is installed with fixed seat 4, the sling 5 is installed on the fixed seat 4, the fastener 6 is installed at the connection of the sling 5, the lower end of the sling 5 is installed with fastener 6, the lower end of the fastener 6 is installed with supporting plate 7, the middle of the lower end of the cross beam 3 is installed, the hanging rail 8 is installed on the hanging rail 8, the slider 9 is installed on the hanging rail 8, the swing rod 11 is installed at the inner lower end of the slider 9 through the rotating shaft 10, and the lower end of the swing rod 11 is bound with a connecting rope 12.

[0030] In this embodiment, rectangular grooves are provided at the left and right ends of the beam 3, and two groups of fixing seats 4 are provided, which are respectively located at the left and right ends of the beam 3. The two groups of fixing seats 4 form double-point lifting at the left and right ends of the beam 3, which can respectively lift the rotating shafts on both sides of the turbine rotor.

[0031] In this embodiment, the supporting piece 7 is rectangular in shape as a whole, and the front and rear ends of the supporting piece 7 are arc-shaped. The rectangular supporting piece 7 has a relatively regular shape, and its cross-sectional area is larger than the cross-sectional area of ​​the sling 5, which can increase the contact surface with the rotor.

[0032] In this embodiment, four groups of circular through holes are provided on the surface of the supporting plate 7, and the sling 5 passes through the through holes of the supporting plate 7 from the bottom and then passes around the supporting plate 7 outward, so that the supporting plate 7 is fitted in an arc shape at the bottom of the sling 5. During hoisting, the sling 5 is stretched after being stressed due to gravity, so that the supporting plate 7 is tightly wrapped around the outer end of the rotor shaft, providing protection for the rotor shaft, thereby making it safer during hoisting.

[0033] In this embodiment, the supporting sheet 7 is made of rubber material. The supporting sheet 7 made of rubber material has strong toughness and can be deformed.

[0034] In this embodiment, a slide groove 901 is provided on the inner side of the slider 9, and the slider 9 is slidably connected to the hanging rail 8. When the rotor is hoisted, the hanging rail 8 in the middle is located directly above the rotor, and the connecting rope 12 is tied to the middle of the rotor. As the center shifts when the rotor is hoisted, the swing rod 11 can be driven to swing through the connecting rope 12, which can facilitate the understanding of the amplitude of the center of gravity shift, and the swing rod 11 can be swung to drive the slider 9 to move horizontally on the hanging rail 8, so as to understand the direction of the center of gravity shift, and then facilitate the operator to make adjustments during hoisting, making the lifting safer.

[0035] In this embodiment, the swing rod 11 is vertically installed at the lower end of the slider 9, and the swing rod (11) is movably connected to the slider (9) via the rotating shaft (10).

Claims

1. A sling for producing a low-pressure rotor of a steam turbine, characterized in that: include: A gantry (1), an electric hoist (2), a crossbeam (3), a fixed seat (4), a sling (5), a fastener (6), a supporting plate (7), a hanging rail (8), a slider (9), a rotating shaft (10), a swing rod (11) and a connecting rope (12), wherein the gantry (1) is equipped with an electric hoist (2), a crossbeam (3) is suspended at the lower end of the electric hoist (2), a fixed seat (4) is installed on the beam frame of the crossbeam (3), and a hanging rod (11) is installed on the fixed seat (4). A rope (5), a fastener (6) is installed at the connection of the rope (5), a fastener (6) is installed at the lower end of the rope (5), a supporting plate (7) is installed at the lower end of the fastener (6), a hanging rail (8) is installed at the middle of the lower end of the crossbeam (3), a slider (9) is installed on the hanging rail (8), a swing rod (11) is installed at the inner lower end of the slider (9) through a rotating shaft (10), and the lower end of the swing rod (11) is bound with a connecting rope (12).

2. The sling for producing a low-pressure rotor of a steam turbine according to claim 1, characterized in that: Rectangular grooves are provided at the left and right ends of the cross beam (3), and two groups of fixing seats (4) are provided. The two groups of fixing seats (4) are respectively located at the left and right ends of the cross beam (3).

3. The sling for producing a low-pressure rotor of a steam turbine according to claim 1, characterized in that: The supporting piece (7) is rectangular in shape as a whole, and the front and rear ends of the supporting piece (7) are arc-shaped.

4. The sling for producing a low-pressure rotor of a steam turbine according to claim 1, characterized in that: The surface of the supporting plate (7) is provided with four groups of circular through holes, and the sling (5) passes through the through holes of the supporting plate (7) from the bottom and then passes around the supporting plate (7) outwards.

5. The sling for producing a low-pressure rotor of a steam turbine according to claim 1, characterized in that: The supporting sheet (7) is made of rubber material.

6. The sling for producing a low-pressure rotor of a steam turbine according to claim 1, characterized in that: A slide groove (901) is provided on the inner side of the slide block (9), and the slide block (9) is slidably connected to the hanging rail (8).

7. The sling for producing a low-pressure rotor of a steam turbine according to claim 1, characterized in that: The swing rod (11) is vertically mounted at the lower end of the slider (9), and the swing rod (11) is movably connected to the slider (9) via a rotating shaft (10).

Images