Gas turbine cylinder body hoisting method

Abstract

The gas turbine cylinder body hoisting method comprises the following steps that S1, a laser emitting device is arranged at the bottom of a hoisting tool of a traveling crane, and the laser emitting device can downwards emit positioning laser extending in the vertical direction; s2, a gravity center mark point is marked on the upper surface of the gas turbine cylinder body, and the gravity center mark point is located over the gravity center of the gas turbine cylinder body; s3, a plurality of slings hung on the lifting appliance are connected with a plurality of hanging points of the gas turbine cylinder body in a one-to-one correspondence mode, and after each sling connected with the gas turbine cylinder body is stressed and the positioning laser irradiates the gravity center mark point on the gas turbine cylinder body, adjustment of the position of the lifting appliance in the horizontal direction is stopped; and S4, a lifting device on the travelling crane drives the lifting appliance to move upwards so as to lift the gas turbine cylinder body. According to the gas turbine cylinder body hoisting method, the gas turbine cylinder body can be conveniently and stably hoisted.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbine assembly, and particularly relates to a method for hoisting a gas turbine cylinder block. Background Art

[0002] During the assembly process of a heavy-duty gas turbine, it is a key operation to use the overhead crane in the workshop to lift in or out the cylinder blocks of various components of the gas turbine. Especially during the operation of disassembling and assembling the cylinder block with stationary blades, if the hoisting is not stable, it is very likely to cause serious consequences such as rubbing between the stationary and moving blades or clamping of the cylinder block resulting in scoring of the mating surface. It is crucial to confirm the hoisting when the four points of the horizontal installation edge of the cylinder block are flush before hoisting the gas turbine cylinder block. The heavy-duty gas turbine cylinder block includes an inlet cylinder, a compressor cylinder, a combustion and compression cylinder, a turbine cylinder, an exhaust cylinder, etc., and has a left-right symmetric but axially irregular structure. In the related art, the hoisting commander visually confirms the approximate position of the overhead crane hook relative to the center of gravity of the cylinder, and through trial hoisting, observes the hoisting state of the four points at the bottom of the cylinder block and adjusts the position of the hook in the front, rear, left, and right directions to achieve stable hoisting. This process takes about half of the entire cylinder block hoisting operation, and at the same time, it highly tests the experience and level of the hoisting commander. If the central position of the hook is not accurately observed, repeated adjustments will occur, affecting the efficiency of hoisting the cylinder. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to some extent. For this purpose, an embodiment of the present invention provides a method for hoisting a gas turbine cylinder block.

[0004] The method for hoisting a gas turbine cylinder block according to the embodiment of the present invention includes the following steps:

[0005] S1. A laser emitting device is arranged at the bottom of the lifting tool of the overhead crane. The laser emitting device can emit a positioning laser extending in the up-down direction downward, and the laser emitting device is located at the central position of the lifting tool in the horizontal direction;

[0006] S2. A center of gravity marking point is marked on the upper surface of the gas turbine cylinder block, and the center of gravity marking point is directly above the center of gravity of the gas turbine cylinder block;

[0007] S3. A plurality of slings hung on the lifting tool are respectively connected to a plurality of hanging points of the gas turbine cylinder block one by one. By observing the position of the positioning laser on the gas turbine cylinder block, the position of the lifting tool in the horizontal direction and the length of at least one of the plurality of slings are adjusted. After each sling connected to the gas turbine cylinder block is stressed and the positioning laser irradiates on the center of gravity marking point on the gas turbine cylinder block, the adjustment of the position of the lifting tool in the horizontal direction is stopped;

[0008] S4. The lifting device on the overhead crane drives the lifting tool to move upward to lift the gas turbine cylinder block.

[0009] In some embodiments, in the step S1, the laser emitting device is a red cross laser emitting device. When the positioning laser emitted by the red cross laser emitting device irradiates on the gas turbine cylinder block, a cross-shaped light beam is formed. The cross-shaped light beam includes a first laser beam and a second laser beam that are vertically and crosswise arranged;

[0010] In the step S3, after each sling connected to the gas turbine cylinder block is stressed and the intersection point of the first laser beam and the second laser beam of the positioning laser irradiates on the center of gravity marking point on the gas turbine cylinder block, stop adjusting the position of the spreader in the horizontal direction.

[0011] In some embodiments, in the step S3,

[0012] Adjust the rotation angle of the spreader so that the length direction of the first laser beam is consistent with the front-back direction of the gas turbine cylinder block, and the length direction of the second laser beam is consistent with the left-right direction of the gas turbine cylinder block;

[0013] Control the crane to adjust the position of the spreader in the left-right direction of the gas turbine cylinder block so that the first laser beam coincides with the midpoint of the mounting edges at the front end and the rear end of the gas turbine cylinder block;

[0014] Control the crane to adjust the position of the spreader in the front-back direction of the gas turbine cylinder block so that the intersection point of the first laser beam and the second laser beam coincides with the center of gravity marking point on the gas turbine cylinder block.

[0015] In some embodiments, in the step S2, the center of gravity marking point is located on the upper surface of the gas turbine cylinder block. The center of gravity marking point is located at the middle position in the left-right direction of the gas turbine cylinder block, and the center of gravity marking point is located at the same position as the center of gravity of the gas turbine cylinder block in the front-back direction of the gas turbine cylinder block.

[0016] In some embodiments, at least two of the multiple slings are provided with chain hoists, and the lengths of the corresponding slings are adjusted through the chain hoists.

[0017] In some embodiments, the number of the slings is four. Two slings are respectively connected to two hanging points at the front end of the gas turbine cylinder block, and two slings are respectively connected to two hanging points at the front end of the gas turbine cylinder block.

[0018] In some embodiments, in step S4, the gas turbine cylinder block is pre-lifted at least once. After each pre-lifting, the lifting state of the gas turbine cylinder block is observed, and then the chain hoist is adjusted, and then the gas turbine cylinder block is lifted.

[0019] In some embodiments, in step S1, the lifting tool is a hook, and the central position of the positioning laser emitted by the laser emitting device coincides with the position of the rotation axis of the hook in the horizontal direction.

[0020] Advantageous effects of the present invention: According to the gas turbine cylinder block lifting method of the embodiments of the present invention, by providing a laser emitting device at the bottom of the lifting tool and located at the central position of the lifting tool in the horizontal direction, and making the laser emitting device emit a positioning laser downward to irradiate on the center of gravity marking point, the lifting tool can be located directly above the center of gravity of the gas turbine cylinder block, reducing the visual error and realizing the stable lifting of the gas turbine cylinder block. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the implementation of the gas turbine cylinder block lifting method according to the embodiments of the present invention.

[0022] Figure 2 is a front view of the lifting tool and the laser emitting device of the gas turbine cylinder block lifting method according to the embodiments of the present invention.

[0023] Figure 3 is a side view of the lifting tool and the laser emitting device of the gas turbine cylinder block lifting method according to the embodiments of the present invention.

[0024] Reference numerals: 1, lifting tool; 2, laser emitting device; 3, gas turbine cylinder block; 4, center of gravity marking point; 5, sling; 6, chain hoist. Detailed Embodiments

[0025] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0026] The gas turbine cylinder block lifting method according to the embodiments of the present invention will be described below with reference to the drawings. As Figures 1 to 3 shown, the gas turbine cylinder block lifting method according to the embodiments of the present invention includes the following steps:

[0027] S1. A laser emission device 2 is provided at the bottom of the lifting tool 1 of the overhead crane. The laser emission device 2 can emit positioning laser extending in the vertical direction downward. The laser emission device 2 is located at the central position of the lifting tool 1 in the horizontal direction. Specifically, the overhead crane used for lifting goods in the factory building is a material handling device, which includes a frame body, a lifting device and a moving device. The frame body includes a track beam and a track, and the lifting device includes an electric hoist and the lifting tool 1. By providing the laser emission device 2 at the bottom of the lifting tool 1 and at the central position of the lifting tool 1 in the horizontal direction, when the laser emission device 2 emits positioning laser downward, the positioning laser can facilitate the positioning of the lifting tool 1, thereby facilitating the determination of the relative position between the lifting tool 1 and the gas turbine cylinder block 3 in the horizontal direction.

[0028] In step S1, the lifting tool 1 is a hook, and the central position of the positioning laser emitted by the laser emission device 2 coincides with the position of the rotation axis of the hook in the horizontal direction. Specifically, the laser emission device 2 is located at the middle position of the hook (lifting tool 1) in both the width direction and the length direction of the hook. So that the position of the emitted positioning laser is the central position of the lifting tool 1.

[0029] S2. A center of gravity marking point 4 is marked on the upper surface of the gas turbine cylinder block 3. The center of gravity marking point 4 is located directly above the center of gravity of the gas turbine cylinder block 3. Specifically, in step S2, the center of gravity marking point 4 is located on the upper surface of the gas turbine cylinder block 3. The center of gravity marking point 4 is located at the middle position of the gas turbine cylinder block 3 in the left - right direction, and the center of gravity marking point 4 is located at the same position as the center of gravity on the gas turbine cylinder block 3 in the front - back direction of the gas turbine cylinder block 3. Specifically, the front - back direction of the gas turbine cylinder block 3 and the left - right direction of the gas turbine cylinder block 3 are perpendicular to each other. The front - back direction of the gas turbine cylinder block 3 is the axial direction of the gas turbine cylinder block 3, and the left - right direction of the gas turbine cylinder block 3 is the radial direction of the gas turbine cylinder block 3 and is the horizontal direction. For the gas turbine cylinder block 3 with the center of gravity position marked at the factory, the center of gravity marking point 4 can be directly marked on the upper surface of the gas turbine cylinder block 3, so that the center of gravity marking point 4 is located at the same position as the center of gravity on the gas turbine cylinder block 3 in the front - back direction. Or, the center of gravity of the gas turbine cylinder block 3 is calculated through the design drawings, so that the center of gravity marking point 4 is located at the same position as the center of gravity on the gas turbine cylinder block 3 in the front - back direction.

[0030] S3. Connect the multiple slings 5 hung on the spreader 1 to the multiple hanging points of the gas turbine cylinder block 3 in one-to-one correspondence. By observing the position of the positioning laser on the gas turbine cylinder block 3, adjust the position of the spreader 1 in the horizontal direction and the length of at least one of the multiple slings 5. Stop adjusting the position of the spreader 1 in the horizontal direction after each sling 5 connected to the gas turbine cylinder block is stressed and the positioning laser shines on the center-of-gravity marking point 4 on the gas turbine cylinder block 3. Specifically, after connecting the multiple slings 5 to the gas turbine cylinder block 3, adjust the position of the spreader 1 by the position where the positioning laser shines on the gas turbine cylinder block 3, so that the positioning laser shines on the center-of-gravity marking point 4 on the gas turbine cylinder block 3, thereby enabling the spreader 1 to be directly above the center of gravity of the gas turbine cylinder block 3. At the same time, adjust the length of the sling 5 so that each sling 5 is stressed and the state of the gas turbine cylinder block 3 is (substantially) the same as when it is placed on the ground, so as to facilitate maintaining stability when the spreader 1 hoists.

[0031] S4. The lifting device on the crane drives the spreader 1 to move upward to lift the gas turbine cylinder block 3, thus facilitating the assembly of the gas turbine cylinder block 3.

[0032] In some embodiments, in step S1, the laser emitting device 2 is a red cross-line laser emitting device 2. When the positioning laser emitted by the red cross-line laser emitting device 2 shines on the gas turbine cylinder block 3, a cross-shaped light beam is formed. The cross-shaped light beam includes a first laser beam and a second laser beam that are vertically and crosswise arranged. Specifically, the positioning laser is a cross-shaped beam laser, which is convenient for the staff to observe the position of the positioning laser, thereby facilitating position correction.

[0033] In step S3, stop adjusting the position of the spreader 1 in the horizontal direction after each sling 5 connected to the gas turbine cylinder block is stressed and the intersection point of the first laser beam and the second laser beam of the positioning laser shines on the center-of-gravity marking point 4 on the gas turbine cylinder block 3. Specifically, the intersection point of the first laser beam and the second laser beam is the center position of the positioning laser. When the center position of the positioning laser shines on the center-of-gravity marking point 4, it means that the spreader 1 is directly above the center of gravity of the gas turbine cylinder block 3.

[0034] In some embodiments, in step S3, adjust the rotation angle of the spreader 1 so that the length direction of the first laser beam is consistent with the front-back direction of the gas turbine cylinder block 3, and the length direction of the second laser beam is consistent with the left-right direction of the gas turbine cylinder block 3. That is, first adjust the rotation angle of the laser emitting device 2 so that the two laser beams (the first laser beam and the second laser beam) of the cross-shaped light beam respectively correspond to the front-back direction and the left-right direction of the gas turbine cylinder block 3.

[0035] Control the position of the hoisting spreader 1 for the gas turbine cylinder block 3 in the left - right direction so that the first laser beam coincides with the mid - points of the mounting edges at the front and rear ends of the gas turbine cylinder block 3. Control the position of the hoisting spreader 1 for the gas turbine cylinder block 3 in the front - rear direction so that the intersection point of the first laser beam and the second laser beam coincides with the center - of - gravity marking point 4 on the gas turbine cylinder block 3. That is, first move the positioning laser (spreader 1) to the middle position in the left - right direction of the gas turbine cylinder block 3. Then move the positioning laser (spreader 1) to the position of the center of gravity in the front - rear direction of the gas turbine cylinder block 3 so that the positioning laser (spreader 1) is directly above the center of gravity of the gas turbine cylinder block 3.

[0036] In some embodiments, at least two of the plurality of slings 5 are provided with chain hoists 6. By adjusting the length of the corresponding sling 5 through the chain hoist 6, it is convenient to adjust the lifting posture of the gas turbine cylinder block 3.

[0037] In some embodiments, the number of slings 5 is four. Two slings 5 are respectively connected to two hanging points at the front end of the gas turbine cylinder block 3, and two slings 5 are respectively connected to two hanging points at the front end of the gas turbine cylinder block 3. The lifting posture of the gas turbine cylinder block 3 can be adjusted by adjusting the lengths of the slings 5 at the two hanging points at the front end of the gas turbine cylinder block 3 and / or adjusting the lengths of the slings 5 at the two hanging points at the rear end of the gas turbine cylinder block 3.

[0038] In some embodiments, in step S4, the gas turbine cylinder block 3 is pre - lifted at least once. After each pre - lift, observe the lifting state of the gas turbine cylinder block 3, then adjust the chain hoist 6, and then lift the gas turbine cylinder block 3. That is, first lift tentatively once or multiple times, finely adjust the chain hoist, and finely adjust the lengths of the corresponding slings 5 so as to finally achieve the stable lifting of the gas turbine cylinder block 3.

[0039] According to the gas turbine cylinder block hoisting method of the embodiment of the present invention, a laser emitting device 2 is provided at the bottom of the spreader 1 at the central position in the horizontal direction, and the laser emitting device 2 emits a positioning laser downward to irradiate on the center - of - gravity marking point 4, so that the spreader 1 can be directly above the center of gravity of the gas turbine cylinder block 3, reducing the visual error. At the same time, adjust the lengths of the slings 5 so that each sling 5 is stressed, and make the state of the gas turbine cylinder block 3 (substantially) the same as when it is placed on the ground, so that the spreader 1 can be easily kept stable during lifting, realizing the stable lifting of the gas turbine cylinder block 3 and thus improving the assembly efficiency.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0042] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0044] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for hoisting a gas turbine cylinder block, characterized in that, It includes the following steps: S1. A laser emitting device is arranged at the bottom of the spreader of the overhead crane. The laser emitting device can emit positioning laser extending in the up-and-down direction downward. The laser emitting device is located at the central position of the spreader in the horizontal direction; S2. A center-of-gravity marking point is marked on the upper surface of the gas turbine cylinder block. The center-of-gravity marking point is directly above the center of gravity of the gas turbine cylinder block; S3. A plurality of slings hung on the spreader are respectively connected to a plurality of hanging points of the gas turbine cylinder block one by one. By observing the position of the positioning laser on the gas turbine cylinder block, adjust the position of the spreader in the horizontal direction and the length of at least one of the plurality of slings. Stop adjusting the position of the spreader in the horizontal direction after each sling connected to the gas turbine cylinder block is stressed and the positioning laser shines on the center-of-gravity marking point on the gas turbine cylinder block; S4. The lifting device on the overhead crane drives the spreader to move upward to lift the gas turbine cylinder block.

2. The method for hoisting a gas turbine cylinder block according to claim 1, wherein in the step S1, the laser emitting device is a red-light cross-line laser emitting device. When the positioning laser emitted by the red-light cross-line laser emitting device shines on the gas turbine cylinder block, a cross-shaped light beam is formed. The cross-shaped light beam includes a first laser beam and a second laser beam that are vertically and crosswise arranged; in the step S3, stop adjusting the position of the spreader in the horizontal direction after each sling connected to the gas turbine cylinder block is stressed and the intersection point of the first laser beam and the second laser beam of the positioning laser shines on the center-of-gravity marking point on the gas turbine cylinder block.

3. The gas turbine cylinder body hoisting method according to claim 2, characterized in that, In the step S3, adjust the rotation angle of the spreader so that the length direction of the first laser beam is consistent with the front-back direction of the gas turbine cylinder block, and the length direction of the second laser beam is consistent with the left-right direction of the gas turbine cylinder block; control the overhead crane to adjust the position of the spreader in the left-right direction of the gas turbine cylinder block so that the first laser beam coincides with the midpoints of the front and rear mounting edges of the gas turbine cylinder block; control the overhead crane to adjust the position of the spreader in the front-back direction of the gas turbine cylinder block so that the intersection point of the first laser beam and the second laser beam coincides with the center-of-gravity marking point on the gas turbine cylinder block.

4. The gas turbine cylinder body hoisting method according to claim 1, characterized in that, In the step S2, the center-of-gravity marking point is located on the upper surface of the gas turbine cylinder block. The center-of-gravity marking point is located at the middle position in the left-right direction of the gas turbine cylinder block, and the center-of-gravity marking point is located at the same position as the center of gravity of the gas turbine cylinder block in the front-back direction of the gas turbine cylinder block.

5. The gas turbine cylinder body hoisting method according to claim 1, characterized in that At least two of the plurality of slings are provided with chain hoists, and the lengths of the corresponding slings are adjusted through the chain hoists.

6. The gas turbine cylinder body hoisting method according to claim 5, characterized in that, The number of the slings is four. Two slings are respectively connected to the two hanging points at the front end of the gas turbine cylinder block, and two slings are respectively connected to the two hanging points at the front end of the gas turbine cylinder block.

7. The gas turbine cylinder body hoisting method according to claim 5, characterized in that, In the step S4, the gas turbine cylinder block is pre-lifted at least once. After each pre-lifting, the lifting state of the gas turbine cylinder block is observed, and then the chain block is adjusted, and then the gas turbine cylinder block is lifted.

8. The gas turbine cylinder body hoisting method according to claim 1, characterized in that, In the step S1, the lifting tool is a hook, and the central position of the positioning laser emitted by the laser emitting device coincides with the position of the rotation axis of the hook in the horizontal direction.

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