Large rotary system locking device

Abstract

The invention relates to a rotary system locking device, in particular to a large rotary system locking device which comprises a stand column, a mounting plate is rotationally arranged on the outer side of the stand column, a plurality of positioning holes are formed in the mounting plate in an annular array in a penetrating mode, and sealing flanges are fixedly arranged at the positions, above the positioning holes, of the mounting plate. A fixing pin is detachably mounted on the sealing flange, a supporting structure is fixedly arranged on the outer wall of the stand column, the supporting structure is located below the mounting plate, the supporting structure at least comprises an upper annular plate and a lower annular plate which are fixedly arranged on the outer wall of the stand column, and a plurality of limiting structures are fixedly arranged on the upper annular plate in an annular array mode; the limiting structures are used for fixing the position of the mounting plate, jacks are fixedly arranged on the upper annular plate and located between every two adjacent limiting structures, upward mechanical support can be provided for the mounting plate in the locking state, and the mounting plate is effectively prevented from falling due to the dead weight when the bearing connecting piece is disassembled.

Description

Technical Field

[0001] This invention relates to a locking device for a slewing system, and more particularly to a locking device for a large slewing system. Background Technology

[0002] In the field of marine engineering, large slewing systems, such as the turret of a single-point mooring system, are core components that enable fluid transfer between a floating production storage and offloading (FPSO) unit and subsea pipelines, allowing it to rotate with the wind vane effect. The slewing section of such systems is mounted on a fixed column via large bearings and must be able to rotate flexibly during normal operation and be reliably locked during maintenance and repair.

[0003] Currently, simple pin mechanisms are typically used for locking large slewing systems like this. However, in harsh marine environments, especially during critical maintenance operations such as replacing key components (like bearings), existing locking devices present significant problems: their locking reliability is insufficient, making it difficult to effectively withstand enormous overturning moments and complex marine loads, posing safety hazards; furthermore, the lack of auxiliary support for the slewing structure in the locked state means that the entire slewing structure risks falling due to gravity when disassembling bearing connections, resulting in high-risk and complex maintenance procedures. Summary of the Invention

[0004] The main objective of this invention is to provide a locking device for a large slewing system to solve the problems raised in the related art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a locking device for a large rotary system is provided, comprising a column, an mounting plate rotatably disposed on the outer side of the column, a plurality of positioning holes being formed in a circular array on the mounting plate, a sealing flange being fixedly disposed above each positioning hole on the mounting plate, a fixing pin being detachably mounted on the sealing flange, a support structure being fixedly disposed on the outer wall of the column, the support structure being located below the mounting plate, the support structure comprising at least an upper ring plate and a lower ring plate fixedly disposed on the outer wall of the column, a plurality of limiting structures being fixedly disposed in a circular array on the upper ring plate, the limiting structures being used to fix the position of the mounting plate, and a jack being fixedly disposed between each two adjacent limiting structures on the upper ring plate, and a lip seal being fixedly disposed on the upper ring plate inside the jack.

[0006] Furthermore, a reinforcing ring is fixedly provided on the inner wall of the positioning hole, and the sealing flange includes a flange plate fixedly provided on the top of the reinforcing ring. A flange cover is inserted into the flange plate, and fixing bolts are symmetrically threaded through the flange plate and the flange cover.

[0007] Furthermore, the fixing pin includes at least a pin, with a pin shaft fixedly connected to the bottom of the pin and a lifting ring fixedly connected to the top of the pin. In the locked state, the lower end of the pin shaft passes through the center of the flange cover, the flange, and the positioning hole below it in sequence.

[0008] Furthermore, the diameter of the upper ring plate is larger than that of the lower ring plate, and a number of reinforcing ribs are fixedly connected between the upper ring plate and the lower ring plate in a ring array.

[0009] Furthermore, a number of diagonal bracing plates are fixedly connected between the upper ring plate and the lower ring plate. The two ends of the diagonal bracing plates are in contact with the outer walls of the upper ring plate and the lower ring plate, respectively, and the side walls of the diagonal bracing plates are fixedly connected to the reinforcing ribs.

[0010] Furthermore, the limiting structure includes a fixing plate fixedly mounted on the upper ring plate, and curved plates are symmetrically fixedly mounted on the fixing plate, forming a slot between the two curved plates. The pin is engaged in the slot, and the length of the slot is equal to the diameter of the pin.

[0011] Furthermore, a supporting rib is welded to the bottom of the curved plate, and the supporting rib is fixedly connected to the fixing plate.

[0012] Furthermore, elbow plates are symmetrically fixedly connected to the bottom of the upper ring plate, and the elbow plates are positioned corresponding to the two ends of the fixed plate.

[0013] Furthermore, the lip seal includes a vertical plate fixedly mounted on the upper ring plate, a bottom plate fixedly connected to the side wall of the vertical plate, and a top plate disposed above the bottom plate, the top plate being L-shaped.

[0014] Furthermore, a sealing layer is fixedly provided between the bottom plate and the top plate, and screws are threaded through the top plate and the bottom plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In this large-scale rotary system locking device, the locking load of the mounting plate is effectively transferred to the robust support structure and column through the cooperation of multiple limiting structures arranged in a ring array with the fixing pin, forming a stable and reliable anti-overturning moment structure, which significantly improves the locking safety and stability of the system during maintenance.

[0016] 2. In this large-scale rotary system locking device, by setting jacks on the support structure, the mounting plate can be provided with upward mechanical support in the locked state, which effectively prevents the mounting plate from falling due to its own weight when disassembling the bearing connecting parts, greatly reducing the risk and difficulty of maintenance operations and ensuring the safety of maintenance personnel and equipment. Attached Figure Description

[0017] Figure 1This is a front view of the overall structure in the preferred embodiment of the present invention with the fixing pin installed. Figure 2 This is a front view of the overall structure in the preferred embodiment of the present invention with the fixing pin pulled out. Figure 3 This is a schematic diagram of the lip seal installation position structure in a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of the overall structure of the support structure in a preferred embodiment of the present invention; Figure 5 This is a plan view of the overall structure of the limiting structure in a preferred embodiment of the present invention; Figure 6 This is a top view of the limiting structure in a preferred embodiment of the present invention; Figure 7 This is a plan view of the overall structure of the lip seal in a preferred embodiment of the present invention; Figure 8 This is a top view of the mounting plate in a preferred embodiment of the present invention.

[0018] Figure label: 1. Columns; 2. Mounting plate; 21. Positioning hole; 22. Reinforcing ring; 3. Sealing flange; 31. Flange; 32. Flange cover; 33. Fixing bolts; 4. Fixing pin; 41. Insert pin; 42. Pin shaft; 43. Lifting ring; 5. Supporting structure; 51. Upper ring plate; 52. Lower ring plate; 53. Reinforcing rib plate; 54. Diagonal brace plate; 6. Limiting structure; 61. Fixing plate; 62. Curved plate; 63. Supporting rib; 64. Slot; 65. Elbow plate; 7. Jack; 8. Lip seal; 81. Vertical plate; 82. Bottom plate; 83. Top plate; 84. Sealing layer; 85. Screws. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] This embodiment provides a locking device for a large-scale rotating system, including a column 1. The column 1 is the core load-bearing column and rotating shaft of the entire single-point system. One end of the column 1 is fixed to the seabed foundation, and the other end extends upward to above the water surface. A mounting plate 2 is rotatably mounted on the outside of the column 1 via bearings. The mounting plate 2 constitutes the main body of the rotating system. Several positioning holes 21 are arranged in a circular array on the mounting plate 2. A sealing flange 3 is fixedly mounted on the mounting plate 2 above each positioning hole 21. A fixing pin 4 is detachably installed on the column 1. A support structure 5 is fixedly installed on the outer wall of the column 1. The support structure 5 is located below the mounting plate 2. The support structure 5 includes at least an upper ring plate 51 and a lower ring plate 52 fixedly installed on the outer wall of the column 1. Several limiting structures 6 are fixedly installed in a ring array on the upper ring plate 51. The limiting structures 6 are used to fix the position of the mounting plate 2. A jack 7 is fixedly installed on the upper ring plate 51 between two adjacent limiting structures 6. A lip seal 8 is also fixedly installed on the upper ring plate 51 inside the jack 7.

[0021] like Figure 1 and Figure 2 As shown, to enhance the structural strength at the positioning hole 21, a reinforcing ring 22 is fixedly provided on the inner wall of the positioning hole 21. The sealing flange 3 includes a flange 31 fixedly provided on the top of the reinforcing ring 22. A flange cover 32 is inserted into the flange 31. Fixing bolts 33 are symmetrically threaded through the flange 31 and the flange cover 32.

[0022] like Figure 1 As shown, the fixing pin 4 includes at least a pin 41, the bottom of which is fixedly connected to a pin shaft 42, and the top of which is fixedly connected to a lifting ring 43 for easy operation; in the locked state, the lower end of the pin shaft 42 passes through the center of the flange cover 32, the flange 31 and the positioning hole 21 below it in sequence.

[0023] like Figure 4 As shown, the upper ring plate 51 is the top layer of the support structure 5, directly bearing the external load or equipment weight, while the lower ring plate 52 is the bottom layer of the support structure 5, used to distribute and transfer the load from the upper ring plate 51. The diameter of the upper ring plate 51 is larger than that of the lower ring plate 52, and several reinforcing ribs 53 are fixedly connected in a ring array between the upper ring plate 51 and the lower ring plate 52. They are usually vertically arranged and radially distributed to ensure that the load is evenly distributed throughout the support structure 5, increasing the overall rigidity and bending resistance of the structure.

[0024] like Figure 4As shown, a plurality of diagonal bracing plates 54 are fixedly connected between the upper ring plate 51 and the lower ring plate 52. The two ends of the diagonal bracing plates 54 are in contact with the outer walls of the upper ring plate 51 and the lower ring plate 52, respectively, and the side walls of the diagonal bracing plates 54 are fixedly connected to the reinforcing ribs 53. The diagonal bracing plates 54 provide lateral support for the structure and connect the upper ring plate 51 and the lower ring plate 52 at a certain inclination angle to enhance the overall shear resistance.

[0025] like Figure 1 , Figure 5 and Figure 6 As shown, the limiting structure 6 includes a fixing plate 61 fixedly mounted on the upper ring plate 51. Curved plates 62 are symmetrically fixedly mounted on the fixing plate 61, and a slot 64 is formed between the two curved plates 62. The pin 42 is engaged in the slot 64, and the length of the slot 64 is equal to the diameter of the pin 42.

[0026] like Figure 5 As shown, a support rib 63 is welded to the bottom of the curved plate 62, and the support rib 63 is fixedly connected to the fixed plate 61; the curved plate 62 extends toward the fixed plate 61, and there is a gap between its tail end and the fixed plate 61 and the support rib 63, so as to facilitate welding and manufacturing, reduce local welding stress concentration, and facilitate the transfer of locking load to the overall structure.

[0027] like Figure 5 As shown, the bottom of the upper ring plate 51 is symmetrically fixedly connected with elbow plates 65, and the elbow plates 65 correspond to the positions of the two ends of the fixed plate 61. The elbow plates 65 are used to improve the structural strength.

[0028] like Figure 1 As shown, and it is worth noting that during daily operation and oil filling, the mounting plate 2 is in a rotating state. At this time, the fixing pin 4 is in a non-inserted state, and the flange cover 32 is installed on the flange 31 and fixed by the fixing bolt 33. When it is necessary to fix the mounting plate 2, the positioning hole 21 corresponds to the slot 64. At this time, the fixing pin 4 is inserted, the lifting ring 43 is pressed down and rotated, and the weight of the pin 41 is used to make the pin shaft 42 engage with the positioning hole 21 and the slot 64, thereby fixing the mounting plate 2.

[0029] like Figure 1 , Figure 3 , Figure 4 and Figure 8As shown, during maintenance, when the bearing needs to be replaced, since the outer ring of the bearing is connected to the inner wall of the mounting plate 2, if the connecting bolts are removed, the mounting plate 2 will fall due to gravity. Therefore, several jacks 7 are set on the support structure 5. The jacks 7 are preferably hydraulic jacks. It is worth noting that the jacks 7 are set at 90° intervals. The lip seal 8 includes a vertical plate 81 fixedly set on the upper ring plate 51. The side wall of the vertical plate 81 is fixedly connected to a bottom plate 82. A top plate 83 is set above the bottom plate 82. The top plate 83 is L-shaped.

[0030] like Figure 7 As shown, a sealing layer 84 is fixedly provided between the bottom plate 82 and the top plate 83, and screws 85 are threaded through the top plate 83 and the bottom plate 82.

[0031] In practical use, under normal operating conditions, the mounting plate 2 needs to rotate freely relative to the column 1. At this time, all fixing pins 4 are in the pulled-out state, and the flange cover 32 of each sealing flange 3 must be closed and tightened with fixing bolts 33 to prevent seawater and debris from entering. During maintenance, especially when replacing bearings, the mounting plate 2 needs to be locked in place. During operation, first, drive the mounting plate 2 to rotate slowly until all the positioning holes 21 on it are precisely aligned with the slots 64 of the corresponding limiting structures 6 below. Then, operate... Personnel remove each flange cover 32 in sequence, insert the fixing pin 4, press down and rotate the lifting ring 43, and use the weight of the pin 41 to lock the pin shaft 42 into the positioning hole 21 and the slot 64, thereby fixing the mounting plate 2. Then, the multiple jacks 7 arranged on the upper ring plate 51 are activated, so that their lifting parts contact the bottom surface of the mounting plate 2 and provide stable upward support force, thereby distributing the load of the mounting plate 2 and the load it bears, forming a safe maintenance working environment. After the maintenance work is completed, the operation is reversed to unlock and restore the system to normal operation.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A locking device for a large rotary system, comprising a column (1), characterized in that, An mounting plate (2) is rotatably mounted on the outside of the column (1). Several positioning holes (21) are opened in a ring array on the mounting plate (2). A sealing flange (3) is fixedly mounted on the mounting plate (2) above each positioning hole (21). A fixing pin (4) is detachably mounted on the sealing flange (3). A support structure (5) is fixedly mounted on the outer wall of the column (1). The support structure (5) is located below the mounting plate (2). The support structure (5) includes at least an upper ring plate (51) and a lower ring plate (52) fixedly mounted on the outer wall of the column (1). Several limiting structures (6) are fixedly mounted in a ring array on the upper ring plate (51). The limiting structures (6) are used to fix the position of the mounting plate (2). A jack (7) is fixedly mounted between two adjacent limiting structures (6) on the upper ring plate (51). A lip seal (8) is also fixedly mounted on the upper ring plate (51) inside the jack (7).

2. The locking device for a large rotary system according to claim 1, characterized in that, A reinforcing ring (22) is fixedly provided on the inner wall of the positioning hole (21). The sealing flange (3) includes a flange (31) fixedly provided on the top of the reinforcing ring (22). A flange cover (32) is inserted into the flange (31). Fixing bolts (33) are symmetrically threaded through the flange (31) and the flange cover (32).

3. The locking device for a large rotary system according to claim 1, characterized in that, The fixing pin (4) includes at least a pin (41), the bottom of which is fixedly connected to a pin shaft (42), and the top of which is fixedly connected to a lifting ring (43). In the locked state, the lower end of the pin shaft (42) passes through the center of the flange cover (32), the flange (31), and the positioning hole (21) below it in sequence.

4. The locking device for a large rotary system according to claim 1, characterized in that, The upper ring plate (51) has a larger diameter than the lower ring plate (52), and the upper ring plate (51) and the lower ring plate (52) are fixedly connected in a ring array with several reinforcing ribs (53).

5. The locking device for a large rotary system according to claim 4, characterized in that, A number of diagonal bracing plates (54) are fixedly connected between the upper ring plate (51) and the lower ring plate (52). The two ends of the diagonal bracing plates (54) are in contact with the outer walls of the upper ring plate (51) and the lower ring plate (52) respectively, and the side walls of the diagonal bracing plates (54) are fixedly connected to the reinforcing ribs (53).

6. The locking device for a large rotary system according to claim 3, characterized in that, The limiting structure (6) includes a fixing plate (61) fixedly mounted on the upper ring plate (51), and curved plates (62) are symmetrically fixedly mounted on the fixing plate (61). A slot (64) is formed between the two curved plates (62). The pin (42) is engaged in the slot (64), and the length of the slot (64) is equal to the diameter of the pin (42).

7. The locking device for a large rotary system according to claim 6, characterized in that, The bottom of the curved plate (62) is welded with a support rib (63), and the support rib (63) is fixedly connected to the fixing plate (61).

8. The locking device for a large rotary system according to claim 6, characterized in that, The bottom of the upper ring plate (51) is symmetrically fixedly connected with elbow plates (65), and the elbow plates (65) correspond to the positions of the two ends of the fixed plate (61).

9. The locking device for a large rotary system according to claim 1, characterized in that, The lip seal (8) includes a vertical plate (81) fixedly mounted on the upper ring plate (51), a bottom plate (82) fixedly connected to the side wall of the vertical plate (81), and a top plate (83) provided above the bottom plate (82), the top plate (83) being L-shaped.

10. The locking device for a large rotary system according to claim 9, characterized in that, A sealing layer (84) is fixedly provided between the bottom plate (82) and the top plate (83), and screws (85) are threaded through the top plate (83) and the bottom plate (82).

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