A main lifting lug structure and device of a marine substation with a ring-like device

Abstract

The application belongs to the field of power engineering such as offshore substation, and provides a main lifting lug structure and device of offshore substation with annular device, which solves the problem that the traditional lifting lug style cannot meet the large lifting and hoisting, and the technical scheme is as follows: including a lifting lug column, a lifting lug column stiffening rib, a lifting lug annular structure assembly and two lifting lug plates; the two lifting lug plates are symmetrically fixed to the lifting lug column, the lifting lug column stiffening rib is fixed inside the lifting lug column, the lifting lug column stiffening rib and the two lifting lug plates are fixedly connected, the lifting lug annular structure assembly includes a plurality of annular structure connecting ribs and an annular structure outer plate, the lifting lug column is uniformly fixed with the plurality of annular structure connecting ribs on the outer surface, the annular structure outer plate is arranged outside the plurality of annular structure connecting ribs, and the annular structure outer plate is fixedly connected with the plurality of annular structure connecting ribs and the lifting lug column respectively. The lifting lug annular structure is added to the stress concentration area, the force transmission component area is increased, and the local stress concentration problem of the lifting lug end connection area is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of power engineering such as offshore substations, and particularly relates to a main lifting lug structure and device with a ring-shaped device for an offshore substation. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] To reduce offshore work, save costs, and ensure quality, offshore substations are generally constructed on land and installed offshore by hoisting. Traditional wind farms typically use traditional pins and clamps, which can be met by using a crane vessel to meet the hoisting requirements.

[0004] With the increasing scale of wind farm development and technological advancements, larger-capacity substations are now being used. The upper modules of these substations are heavier, and traditional lifting lugs can no longer meet the requirements for hoisting them.

[0005] The specific reasons are as follows:

[0006] 1. Traditional pin and clamp lifting lug structure is limited by (1) the lifting weight is limited by the existing maximum clamp specification (2) the lifting lug is located in the middle of the clamp and is a single steel plate bearing the force, so the number is small (3) the thickness of the lifting lug is limited by the clamp and cannot be larger, so it cannot lift a larger weight.

[0007] 2. The column head and lifting lug are together, the nodes are concentrated, and the stress is complex. For example, during the hoisting process, the horizontal force generated by the inward tilt of the hoisting rope on the main lifting lug causes an imbalance of forces on the hoisting column.

[0008] 3. The construction space for the column head is limited, and the welding process is complex.

[0009] 4. Traditional offshore substation lifting lug structures are only used for hoisting and have a single function.

[0010] 5. If the lifting of large-tonnage substations is changed from the lifting vessel to the floating crane installation method, it will change the overall structural layout of the upper part of the substation and the foundation opening and construction and installation method of the lower jacket, greatly increasing the structural span and making the cost expensive. Summary of the Invention

[0011] To address at least one of the technical problems mentioned above, the first aspect of this invention provides a main lifting lug structure with a ring-shaped device for an offshore substation. To solve the problem that traditional lifting lug designs cannot meet the requirements for heavy lifting, the structure of the lifting lug is modified by using a double-lug configuration with a rope in the middle, distributing the force on the single lug plate of the main lifting lug to the two lug plates. This eliminates the need for clamps; and since the lug plates are located outside the rope, their thickness is not limited by the clamp spacing, allowing for the use of thicker plates to meet the requirements for heavier lifting loads.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] A main lifting lug structure with a ring-shaped device for an offshore substation includes: a lifting lug column, a lifting lug column stiffening rib, a lifting lug ring-shaped structure component, and two lifting lug plates;

[0014] The two lug plates are symmetrically fixed to the lug column. The lug column stiffening rib is fixed inside the lug column. The lug column stiffening rib and the two lug plates are fixedly connected. The lug ring structure component includes multiple ring structure connecting ribs and a ring structure outer plate. Multiple ring structure connecting ribs are uniformly fixed to the outer surface of the lug column. The ring structure outer plate is provided on the outside of the multiple ring structure connecting ribs. The ring structure outer plate is fixedly connected to the multiple ring structure connecting ribs and the lug column respectively.

[0015] In one implementation, the two lug plates are arranged in parallel.

[0016] In one implementation, a lug hole is provided above the lug plate, and a groove is provided below the lug plate. The lug plate is fixed to the lug column through the groove, and the lug plate is connected to the lifting rope through the lug hole and the shaft pin for lifting.

[0017] In one embodiment, the structure further includes a fixed load-bearing plate, a booster station top beam, and a hydraulic adjustment device. The fixed load-bearing plate and the booster station top beam are fixed to the outer surface of the lifting lug column. One end of the hydraulic adjustment device is fixed to the upper surface of the booster station top beam, and the other end is fixed to the lower surface of the load-bearing plate.

[0018] In one implementation, the hydraulic adjustment device is used to apply relative tension or pressure to the load-bearing plate and the top beam of the booster station through telescopic operation, thereby adjusting the eccentric force on the lifting lug column caused by the non-vertical lifting of the lifting rope.

[0019] In one implementation, the hydraulic regulating device is fixed at both ends to the upper surface of the booster station top beam and the lower surface of the load-bearing plate by bolts.

[0020] In one embodiment, the multiple annular connecting ribs and the annular outer plate include multiple partitions, each partition forming a cavity. The upper part of the annular outer plate is provided with rainwater holes, and the lower part of the annular connecting ribs is provided with connecting holes, connecting the various partitions into a whole.

[0021] As one implementation, the outer panel of the annular structure is provided with a retaining edge around its perimeter.

[0022] In one embodiment, the stiffening ribs of the lifting lug column include two ribs, which are parallel and symmetrically distributed inside the lifting lug column and fixed therein. The two stiffening ribs and the two lifting lug plates are vertically fixed.

[0023] The second aspect of the present invention provides a main lifting lug device with a ring-shaped device for an offshore substation. In order to solve the problem that the traditional lifting lug style cannot meet the lifting requirements of heavy lifting, the structure of the lifting lug is changed. A double lifting lug with a rope in the middle is adopted, so that the force of the single lug plate of the main lifting lug is distributed to the two lug plates. This method does not require clamps. Moreover, the lug plate is located on the outside of the rope, so the thickness is not limited by the clamp spacing, and a larger plate thickness can be used to meet the requirements of greater lifting weight.

[0024] A main lifting lug device with a ring-shaped device for an offshore substation includes: a main lifting lug structure with a ring-shaped device for an offshore substation as described in any of the first aspects.

[0025] The beneficial effects of this invention are:

[0026] 1. Structurally, this invention distributes the tensile force of a single main lifting lug plate in the traditional design to two lug plates, significantly increasing the load-bearing capacity. It effectively addresses areas of concentrated stress by adding a ring-shaped structure to the lifting lugs, increasing the area of ​​the force-transmitting components and greatly improving the problem of localized stress concentration in the connection area at the end of the lifting lugs. The structural safety factor is greatly improved. The hydraulic adjustment device reduces or eliminates the unfavorable bending moment caused by the non-vertical lifting of the lifting lug column by the lifting rope, effectively increasing the lifting capacity of the lifting lugs.

[0027] 2. In terms of functionality, the single lifting function of the lifting lug is expanded to include lifting and water storage, effectively solving the problem of freshwater replenishment difficulties when sea conditions are severe. The single water storage capacity is 3 to 5 cubic meters, and four or more lifting lugs are usually provided, with a total water storage capacity of 10 to 25 cubic meters. The water storage function can provide continuous replenishment for industrial fire-fighting water tanks, and the water storage function can also provide high-level water tank head pressure for fire protection systems, serving as a backup pressure-stabilizing water tank for fire protection systems.

[0028] 3. Regarding construction lifting equipment, only an intermediate lifting rope is needed, and no clamps are required, which avoids being restricted by the existing maximum clamp specifications and greatly improves the freedom of choice of lifting equipment.

[0029] 4. In terms of manufacturing, the hoisting nodes and column head nodes are set up separately, one above the other. At the same time, the external ring device is made of all column steel pipes welded on the outside, which provides a larger construction welding space and facilitates manufacturing.

[0030] 5. In terms of economy, the upper module of the power station weighs 5,000 to 6,000 tons. This invention is being implemented in the South U Project of the Peninsula under construction. By using the lifting lugs of this invention, a lifting vessel can be used for hoisting. Compared with the comprehensive cost of nearly 100 million yuan for the floating crane method, it saves nearly 10 million yuan.

[0031] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0033] Figure 1 This is a schematic diagram of the overall structure of the main lifting lug with a ring-shaped device in an offshore substation provided in an embodiment of the present invention;

[0034] Figure 2 This is a front elevation view of the main lifting lug structure provided in an embodiment of the present invention;

[0035] Figure 3 This is a side elevation view of the main lifting lug structure provided in an embodiment of the present invention;

[0036] Figure 4 This is a schematic plan view of the hanging lug-shaped structure provided in an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the lug plate structure provided in an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of the annular connecting rib structure provided in an embodiment of the present invention.

[0039] Among them, 1-lifting lug column, 2-lifting lug column stiffening rib, 3-lifting lug ring structure component, 4-ring structure connecting rib, 5-ring structure outer plate, 6-lifting lug plate, 7-shaft pin, 8-lifting rope, 9-boosting station top beam, 10-bearing plate, 11-rainwater hole, 12-connecting hole, 13-enclosure edge, 14-hydraulic adjustment device. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0042] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0043] In this invention, terms such as "upper," "lower," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely relational terms determined for the convenience of describing the structural relationship of the various components or elements of this invention, and do not specifically refer to any component or element in this invention, and should not be construed as limiting this invention.

[0044] In this invention, terms such as "fixed connection" and "connection" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0045] Terminology Explanation

[0046] Lifting lugs are load-bearing components installed in substations for offshore lifting operations.

[0047] Traditional wind farms typically use substations with a capacity of 300MW to 600MW, with the upper modules weighing approximately 3000 to 4000 tons. These can be lifted using traditional methods with pins and clamps, typically with a lifting vessel. However, with the increasing scale of wind farm development and technological advancements, larger 1000MW substations are now being used. The upper modules of these substations can weigh 5000 to 6000 tons, and traditional lifting lugs are insufficient to meet the 5000 to 6000-ton lifting requirements of a 1000MW substation.

[0048] To address the issue that traditional lifting lug designs cannot meet the requirements for heavy lifting loads, this invention modifies the lifting lug structure by using a double lifting lug with a hanging rope in the middle. This distributes the force from the single lug plate of the main lifting lug to the two lug plates. This design eliminates the need for clamps, and since the lug plates are located outside the hanging rope, their thickness is not limited by the clamp spacing, allowing for the use of thicker plates to meet the requirements for heavier lifting loads.

[0049] To address the limited construction space and complex welding process of column heads, this invention employs a separate approach for the hoisting joint and the column head joint, positioned vertically, thus providing more space for construction and welding.

[0050] To address the complexities and stress distribution at column head joints, this invention employs a ring-shaped device between the lifting lug and the column head. By increasing the number and area of ​​force-transmitting components at the ends of the lifting lug plates in the intermediate section, it alleviates the problem of localized stress concentration at the lifting lug joint. Furthermore, it effectively avoids welding inside the steel pipe, simplifying construction.

[0051] The technical solution of the present invention will be specifically described below by way of embodiments.

[0052] Example 1

[0053] Reference Figures 1-6This embodiment provides a main lifting lug structure with a ring-shaped device for an offshore substation, including a lifting lug column 1, a lifting lug column stiffening rib 2, a lifting lug ring-shaped structure assembly 3, two lifting lug plates 6, a shaft pin 7, and a lifting rope 8. The lifting lug ring-shaped structure assembly 3 includes multiple ring-shaped connecting ribs 4 and a ring-shaped outer plate 5, a booster station top beam 9, a load-bearing plate 10, rainwater holes 11, connecting holes 12, a enclosure edge 13, and a hydraulic adjustment device 14.

[0054] In this embodiment, all the structures involved in the lifting lug structure are steel structures.

[0055] The two lug plates 6 are symmetrically fixed to the lug column 1. The lug column 1 is internally fixed with a lug stiffening rib 2. One end of the lug stiffening rib 2 is fixed to the lug column 1, and the other end is fixed to the lug plate 6. Multiple annular structural connecting ribs 4 are uniformly fixed to the outer surface of the lug column 1. An annular structural outer plate 5 is provided on the outside of the multiple annular structural connecting ribs 4. The annular structural outer plate 5 is fixedly connected to the multiple annular structural connecting ribs 4 and the lug column 1 respectively.

[0056] It is understood that in other embodiments, the fixing method can be welding together or other methods of fixing connection. Those skilled in the art can set it according to the specific working conditions, which will not be described in detail here.

[0057] In this embodiment, there are two ear plates 6, which are arranged in parallel. The ear plates have holes on the top and grooves on the bottom, and the ear plates 6 are fixed to the ear column 1 through the grooves.

[0058] In this embodiment, the stiffening ribs 2 of the lifting lug column include two ribs, which are symmetrically distributed in parallel inside the lifting lug column 1 and fixed. The two stiffening ribs 2 and the two lifting lug plates 6 are vertically fixed.

[0059] During hoisting, the shaft pin 7 passes through the lug hole of the lifting lug, and the lifting rope 8 passes under the shaft pin 7. After hoisting is completed, the shaft pin 7 is removed. After inspection, the shaft pin 7 can be used again.

[0060] Furthermore, a load-bearing plate 10 and a booster station top beam 9 are fixed on the lifting lug column 1. The load-bearing plate 10 is also fixedly connected to the lifting lug plate 6. A hydraulic adjustment device 14 is provided on one side of the booster station top beam 9. One end of the hydraulic adjustment device 14 is fixed to the upper surface of the booster station top beam 9, and the other end is fixed to the lower surface of the load-bearing plate 10. During hoisting, the hydraulic adjustment device 14 can be extended or retracted simultaneously to apply relative tension or pressure to the load-bearing plate 10 and the booster station top beam 9, thereby adjusting the eccentric force caused by the non-vertical hoisting of the lifting lug column 1 by the hoisting rope 8.

[0061] In this embodiment, the hydraulic regulating device 14 is fixed to the upper surface of the booster station top beam 9 by bolts, and the other end is fixed to the lower surface of the support plate 10 so that after hoisting, the hydraulic regulating device 14 can be removed by unscrewing the bolts at both ends. After inspection, the hydraulic regulating device 14 can be used again.

[0062] As can be seen from the description, in this embodiment, the number of the booster station top beams 9 can be set by those skilled in the art according to the specific working conditions, and will not be described in detail here.

[0063] like Figure 4 As shown, the outer plate 5 of the annular structure has rainwater holes 11 on the upper part and a surrounding edge 13. The connecting rib 4 of the annular structure has a connecting hole 12 at the lower part. After installation, under the enclosure of the surrounding edge 13, rainwater within the range of the annular structure 3 flows into the cavity inside the annular structure 3 through the rainwater holes 11. The connecting rib 4 of the annular structure has a connecting hole 12 at the lower part, connecting the various sections into a whole. Therefore, the annular structure 3 can collect and store fresh water through the above structure, and can store a large amount of water, which can provide fresh water replenishment for fire water tanks, etc.

[0064] The main principle of the invention is:

[0065] The crane vessel lifts the substation module structure by means of a lifting rope 8. The lifting rope 8 divides the lifting tension into two parts through the bypass pin 7, which are then transmitted to the two lifting lug plates 6. The lifting lug plates 6 are welded to the lifting lug column 1 and transmit the tension received to the lifting lug column 1. At the same time, the lifting lug plates 6 distribute the force to the lifting lug column 1 and the lower node through the stiffening ribs 2 of the lifting lug column. In order to adjust the local stress concentration at the connection between the lifting lug plates 6 and the lifting lug column 1, a ring-shaped device is set at the lower end of the lifting lug plates 6. The principle is that the force at the end of the lifting lug is increased by the ring-shaped connecting ribs 4 and the outer plate 5 of the ring-shaped structure, which increases the number and area of ​​the force transmission components, thereby effectively improving the problem of local stress concentration at the lifting lug node.

[0066] When the substation is not lifted vertically, the lifting lug column 1 is subjected to additional unfavorable bending moment caused by the non-vertical lifting of the lifting rope 8. The externally offset hydraulic adjustment device 14 generates relative tension or pressure on the load-bearing plate 10 and the top beam 9 of the substation through telescopic operation, which reduces or eliminates the unfavorable bending moment caused by the non-vertical lifting of the lifting lug column 1 by the lifting rope 8, and can increase the lifting capacity of the lifting lug.

[0067] Under the enclosure along the edge 13, rainwater within the area of ​​the hanging ring structure 3 flows into the hanging ring structure 3 through the rainwater hole 11. The lower part of the ring structure connecting rib 4 is provided with a connecting hole 12, connecting each zone into a whole. The hanging ring structure 3 becomes a freshwater collection and storage device, which can store a large amount of water and can provide freshwater replenishment for fire water tanks, etc.

[0068] The fence edge 13 can be equipped with railings to provide safety protection for installation personnel, and the lifting lug-shaped structure 3 can be used as an operating platform during hoisting. The fence edge 13 can also serve as a suspension support point for a ladder.

[0069] Example 2

[0070] This embodiment provides a main lifting lug device with a ring-shaped device for an offshore substation, including a main lifting lug structure with a ring-shaped device for an offshore substation as described in any one of Embodiment 1.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A main lifting lug structure with a ring-shaped device for an offshore substation, characterized in that, include: Lifting lug column, lifting lug column stiffening rib, lifting lug ring structure component and two lifting lug plates; The two lug plates are symmetrically fixed to the lug column. The lug column stiffening rib is fixed inside the lug column. The lug column stiffening rib and the two lug plates are fixedly connected. The lug ring structure component includes multiple ring structure connecting ribs and a ring structure outer plate. Multiple ring structure connecting ribs are uniformly fixed to the outer surface of the lug column. The ring structure outer plate is provided on the outside of the multiple ring structure connecting ribs. The ring structure outer plate is fixedly connected to the multiple ring structure connecting ribs and the lug column respectively. The structure also includes a fixed load-bearing plate, a booster station top beam, and a hydraulic adjustment device. The fixed load-bearing plate and the booster station top beam are fixed to the outer surface of the lifting lug column. One end of the hydraulic adjustment device is fixed to the upper surface of the booster station top beam, and the other end is fixed to the lower surface of the load-bearing plate. The multiple ring-shaped connecting ribs and the outer ring-shaped plate include multiple partitions, each partition forming a cavity. The upper part of the outer ring-shaped plate is provided with rainwater holes, and the lower part of the ring-shaped connecting ribs is provided with connecting holes, connecting the various partitions into a whole.

2. The main lifting lug structure of an offshore substation with a ring-shaped device as described in claim 1, characterized in that, The two lug plates are arranged in parallel.

3. The main lifting lug structure of an offshore substation with a ring-shaped device as described in claim 1, characterized in that, The ear plate is provided with an ear plate hole above it and a groove below it. The ear plate is fixed to the ear plate column through the groove and connected to the lifting rope through the ear plate hole and the shaft pin for lifting.

4. The main lifting lug structure of an offshore substation with a ring-shaped device as described in claim 1, characterized in that, The hydraulic adjustment device is used to apply relative tension or pressure to the load-bearing plate and the top beam of the booster station through telescopic operation, and to adjust the eccentric force caused by the non-vertical lifting of the lifting lug column by the lifting rope.

5. The main lifting lug structure of an offshore substation with a ring-shaped device as described in claim 1, characterized in that, The hydraulic regulating device is fixed at both ends to the upper surface of the booster station top beam and the lower surface of the load-bearing plate by bolts.

6. The main lifting lug structure of an offshore substation with a ring-shaped device as described in claim 1, characterized in that, The outer panel of the ring structure is surrounded by a retaining edge.

7. The main lifting lug structure of an offshore substation with a ring-shaped device as described in claim 1, characterized in that, The stiffening ribs of the lifting lug column include two ribs, which are symmetrically distributed in parallel inside the lifting lug column and fixed. The two stiffening ribs and the two lifting lug plates are vertically fixed.

8. A main lifting lug device with a ring-shaped device for an offshore substation, characterized in that, Includes a main lifting lug structure with a ring-shaped device for an offshore substation as described in any one of claims 1-7.

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