CN209988081U - Vibration damping mechanism and buffer cylinder type flexible connecting device - Google Patents

Abstract

The utility model belongs to the technical field of ocean engineering equipment and specifically relates to a damping mechanism and buffer cylinder formula flexible connection device is related to, damping mechanism includes: the cross hinge assembly comprises a proximal hinge support, a cross shaft and a distal hinge support which are sequentially connected along a first direction; the spherical hinge assembly comprises a ball head connecting rod and a spherical hinge support with a spherical cavity, the connecting rod part of the ball head connecting rod is fixedly connected with the telecentric hinge support, and the spherical head part of the ball head connecting rod is hinged in the spherical cavity. The utility model discloses adopted ball pivot and cross axle hinge simultaneously, compared with traditional rigidity fixed bolster, increased the rotational degree of freedom, because the alternating bending moment that the rotation arouses when having eliminated fixed rigid connection has improved the self-adaptive ability to random load and impact, can reduce the fatigue damage risk by a wide margin, guarantees the validity of riser.

Description

Vibration damping mechanism and buffer cylinder type flexible connecting device

Technical Field

The utility model mainly relates to an ocean oil gas conveyor belongs to the ocean engineering and equips the field, especially relates to a damping mechanism and buffering cylinder formula flexible connection device.

Background

Deep water oil and gas development generally adopts a mode of deepening a water riser by a floating platform, and the common floating platform comprises: tension Leg Platforms (TLP), mono-hull platforms (SPAR), SEMI-submersible platforms (SEMI), and floating production storage offloading platforms (FPSO), among others.

The open sea oil and gas production system mode is as follows: (1) the underwater wellhead is connected with TLP, SPAR or SEMI through a riser and then connected with an FPSO or other oil tanker through a conveying pipe; (2) the FPSO is used as a production platform and is directly connected with an underwater wellhead through a vertical pipe; (3) the subsea production system is connected to the FPSO via a riser.

The riser is a key channel for conveying seabed oil and gas from the underwater to the sea surface, the deep water oil and gas development is the same as shallow water and the riser is not separated, and the steel catenary riser is the most widely applied and the simplest to be constructed in the deep water riser. The marine oil transfer riser and the FPSO are in a complex marine working environment and are often influenced by factors such as strong wind, wave and flow, and the large heave and swing motion of the FPSO enables the traditional fixed rigid connection part of the riser and the FPSO to bear large axial impact load, bending and other concentrated acting forces, and the random dynamic load can also cause the connection part of the riser and the FPSO to generate fatigue failure or even fracture. Riser fatigue damage is a form of failure that accumulates slowly and is not easily discovered and is often overlooked. However, when the damage is accumulated to a certain extent, the damage may suddenly break or burst, resulting in a large amount of oil gas leakage and causing serious environmental pollution accidents.

CN201710108632.3 discloses a stress joint device for controlling the bending load distribution of marine risers, which provides a stress joint device for preventing the concentrated stress caused by rigid fixed connection of the end of a riser to a floating platform by adding a reinforcement member and a pair of tightening hoops for fixing the reinforcement member at intervals on the outer wall of the riser, but the device can not effectively eliminate the impact load and large bending load at the connection position of the floating platform and the riser without changing the rigid connection mode of the riser and the floating platform.

Thus, the rigid fixed connection of the conventional riser to the vessel is prone to riser failure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a damping mechanism and buffer cylinder formula flexible connection device to overcome the riser inefficacy problem that riser and floating platform's rigid fixed connection caused.

The utility model provides a vibration damping mechanism, vibration damping mechanism includes:

the cross hinge assembly comprises a proximal hinge support, a cross shaft and a distal hinge support which are sequentially connected along a first direction;

the spherical hinge assembly comprises a ball head connecting rod and a spherical hinge support with a spherical cavity, the connecting rod part of the ball head connecting rod is fixedly connected with the telecentric hinge support, and the spherical head part of the ball head connecting rod is hinged in the spherical cavity.

Further, the spherical hinged support comprises a spherical hinged support body, a C-shaped opening is formed in the spherical hinged support body, the spherical cavity is formed in the C-shaped opening, a C-shaped cambered surface is arranged at the opening end of the C-shaped opening, and the central line of the C-shaped opening and the central line of the C-shaped cambered surface are perpendicularly arranged.

Further, the vibration reduction mechanism further comprises an elastic piece and an elastic piece support, and the elastic piece is connected between the elastic piece support and the spherical hinge support.

The utility model also provides a buffer cylinder formula flexonics device, including connection pad and a plurality of basis damping mechanism, it is a plurality of damping mechanism follows the periphery interval of connection pad set up and all with the connection pad is connected, first direction is followed the radial follow of connection pad the outside direction in center of connection pad.

Further, the buffer cylinder type flexible connecting device comprises a base plate wrapped outside the plurality of vibration reduction mechanisms, the base plate comprises a ring cavity wall and a plurality of pile casings arranged along the circumferential direction of the ring cavity wall, the pile casings extend along the first direction, and the spherical hinge supports extend into the pile casings in a one-to-one correspondence mode.

Further, every be equipped with in protecting the section of thick bamboo and follow the spout that first direction extends, the spherical hinged-support still is including setting up slip table on the spherical hinged-support body, the slip table slides and sets up in the spout.

Furthermore, the buffer cylinder type flexible connecting device also comprises a central ball seat and a ball head hinge rod which are sequentially arranged along a second direction, wherein the second direction is along the direction from the center of the base plate to the center of the connecting plate;

the center ball seat is fixedly connected with the center of the connecting disc, the ball head part of the ball head hinged rod is hinged with the ball cavity of the center ball seat, and the hinged rod part of the ball head hinged rod is connected with the connecting disc.

Further, the center ball seat still includes the cone mouth, along the second direction, the ball chamber of center ball seat with the cone mouth sets gradually to along the second direction, the diameter grow gradually of cone mouth.

Furthermore, a central hinged support is arranged between the hinged rod part of the ball head hinged rod and the connecting disc, one end of the central hinged support is hinged with the hinged rod part of the ball head hinged rod, and the other end of the central hinged support is fixedly connected with the connecting disc.

Furthermore, the buffer cylinder type flexible connecting device further comprises a C-shaped fork fixedly connected with the connecting disc, the C-shaped fork comprises a ring wall, and the ring wall is an inverted circular truncated cone-shaped ring cavity with an opening.

The utility model provides a damping mechanism for the flexonics between riser and the floating platform. On the one hand, the nearly heart hinged-support passes through the cross axle and articulates with the heart hinged-support and forms the cross articulated subassembly, on the other hand, heart hinged-support and bulb connecting rod fixed connection, and the bulb connecting rod is through the articulated spherical cavity formation spherical articulated subassembly that forms on the bulb portion that establishes on it and the ball-type hinged-support, the utility model discloses adopted ball pivot and cross axle hinge simultaneously, compared with traditional rigidity fixed bolster, increased rotatory degree of freedom, because the alternating bending moment that rotates and arouses when having eliminated fixed rigid connection, improved the self-adaptability to random load and impact, can reduce the fatigue damage risk by a wide margin, guarantee the validity of riser.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a buffer cylinder type flexible connecting device according to an embodiment of the present invention;

fig. 2 is a partial schematic structural view of the base plate in fig. 1, with the base plate removed, showing a damping mechanism according to an embodiment of the present invention;

FIG. 3 is a schematic view of the structure of the C-shaped fork of FIG. 1;

fig. 4 is a schematic view of the structure of the basic disc of fig. 1;

fig. 5 is a schematic structural diagram of a connection pad according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a center ball seat according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a ball joint hinge rod according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a center hinge support according to an embodiment of the present invention;

FIG. 9 is a schematic structural view of a cross in accordance with an embodiment of the present invention;

fig. 10 is a schematic structural view of a spherical hinge support according to an embodiment of the present invention;

fig. 11 is a schematic structural view of a ball joint connecting rod according to an embodiment of the present invention;

fig. 12 is a schematic structural view of an elastic member support according to an embodiment of the present invention;

fig. 13 is a front view of the vibration damping mechanism according to the embodiment of the present invention.

In the figure: 1. a C-shaped fork; 101. a threaded hole; 102. plum blossom pillar; 103. a trapezoidal table; 104. A ring platform; 105. an annular wall; 106. opening the gap; 2. a base disk; 200. a ring cavity wall; 201. protecting the cylinder; 202. a chute; 203. a stepped recess; 204. a threaded rod; 205. a flange hole; 3. a connecting disc; 301. a through hole; 302. a central threaded rod; 303. a lateral threaded rod; 4. a central ball seat; 401. a conical mouth; 402. a ball cavity; 403. a stepped hole; 404. a threaded hole; 5. a pin shaft; 6. a ball head hinge rod; 601. a hinge hole; 602. a conical surface; 603. a hinge part; 604. a ball head portion; 7. a central hinged support; 701. a threaded hole; 702. a hinge hole; 8. a proximal hinge support; 9. a cross shaft; 10. a telecentric hinged support; 11. a spherical hinged support; 1101. a C-shaped arc surface; 1102. a ball cavity; 1103. a C-shaped port; 1104. a cylindrical cavity; 1105. a step shoulder; 1106. a sliding table; 1107. a connecting cylinder; 12. a ball head connecting rod; 1201. a threaded rod; 1202. a link section; 1203. a ball head portion; 13. an elastic member; 14. an elastic member support; 1401. an elastic member positioning column; 1402. a bumping post; 15. and (4) bolts.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It should be noted that, in the present invention, the first direction refers to a direction outward from the center of the connecting disc 3 in the radial direction of the connecting disc 3 in fig. 1 and 2; the second direction is a direction from the center of the base disk 2 to the center of the connection disk 3 in fig. 1, in other words, a direction from left to right in the horizontal direction in fig. 1. It can be seen that the second direction is perpendicular to the first direction.

The utility model provides a damping mechanism and buffering jar formula flexonics device, this buffering jar formula flexonics device include the utility model provides a damping mechanism.

As shown in fig. 1 to 13, the flexible connecting device of the buffer cylinder type comprises a connecting disc 3, a proximal hinged support 8, a cross shaft 9, a distal hinged support 10, a ball-end connecting rod 12, a spherical hinged support 11, an elastic element 13 and an elastic element support 14 which are arranged in sequence in a first direction.

The buffer cylinder type flexible connecting device further comprises a base plate 2, a central ball seat 4, a ball head hinge rod 6, a central hinge support 7, a connecting plate 3 and a C-shaped fork 1 which are sequentially arranged along a second direction.

The flexible connecting device of the buffer cylinder type can be used for flexible connection of a riser and a floating platform, for example, connection between an FPSO and a steel catenary riser, when in use, a foundation plate 2 is fixedly connected with the FPSO through a flange, and the end part of the riser is clamped in a C-shaped fork 1.

According to an aspect of the present invention, there is provided a vibration damping mechanism, referring to fig. 2, 9, 10 and 11, comprising a cross hinge assembly and a spherical hinge assembly, wherein the cross hinge assembly comprises a proximal hinge support 8, a cross shaft 9 and a distal hinge support 10 connected in sequence along a first direction; the spherical hinge assembly comprises a ball-shaped connecting rod 12 (see figure 11) and a spherical hinge support 11 (see figure 10) with a spherical cavity 1102, wherein a connecting rod part 1202 of the ball-shaped connecting rod 12 is fixedly connected with the telecentric hinge support 10, and a spherical head part 1203 of the ball-shaped connecting rod 12 is hinged in the spherical cavity 1102. The structure of the cross 9 is shown in fig. 9.

The utility model provides a damping mechanism for the flexonics between riser and the floating platform. On the one hand, nearly heart hinged-support 8 is articulated with heart hinged-support 10 through universal joint 9 and is formed the cross articulated subassembly, on the other hand, heart hinged-support 10 and bulb connecting rod 12 fixed connection, bulb connecting rod 12 is articulated with the spherical cavity 1102 on the ball-type hinged-support 11 through the bulb portion 1203 of establishing on it and is formed spherical articulated subassembly, the utility model discloses adopted ball pivot and universal joint 9 simultaneously, compared with traditional rigid fixation frame, increased rotatory degree of freedom, because the alternating bending moment that the rotation arouses when having eliminated fixed rigid connection, improved the adaptability to random load and impact, can reduce the fatigue damage risk by a wide margin, guarantee the validity of riser.

Furthermore, the utility model discloses convenient to use, reliability are high, can realize slowing down the fatigue damage of riser and floating platform junction, reduce the great concentrated effort of riser and floating platform junction by a wide margin, reduce riser probability of failure, promote the equipment of riser safety in active service and life-span in active service.

The connecting rod portion 1202 of the ball head connecting rod 12 is fixedly connected with the telecentric hinged support 10, and can be fixedly connected in a threaded connection mode, a welding mode, a sticking mode, a clamping mode and the like.

Preferably, as shown in fig. 11, the ball-end connecting rod 12 includes a ball-end portion 1203, a connecting rod portion 1202 and a threaded rod 1201 fixedly connected in sequence. The telecentric hinged support 10 comprises a threaded hole, and the threaded rod 1201 of the ball head connecting rod 12 is meshed with the threaded hole of the telecentric hinged support 10, so that the ball head connecting rod 12 is fixedly connected with the telecentric hinged support 10. The preferred embodiment is threaded connection, and the connection is convenient, firm and reliable.

Preferably, as shown in fig. 10, the spherical hinge support 11 includes a spherical hinge support body, a C-shaped opening 1103 is provided on the spherical hinge support body, a spherical cavity 1102 is formed in the C-shaped opening 1103, and a C-shaped arc 1101 is provided at an opening end of the C-shaped opening 1103, specifically, referring to fig. 10, a C-shaped arc 1101 is provided at an opening end of the C-shaped opening 1103, and a C-shaped arc 1101 is also provided at an opening end of the C-shaped opening 1103. Preferably, the center line of the C-shaped opening 1103 and the center line of the C-shaped arc 1101 are arranged perpendicularly, in other words, the depth direction of the C-shaped opening 1103 is perpendicular to the paper surface, and the depth direction of the C-shaped arc 1101 is parallel to the paper surface. In this embodiment, the spherical hinge support 11 is provided with a C-shaped opening 1103, which allows the ball head link 12 to swing in a larger range in the spherical cavity 1102 along the direction of the C-shaped opening 1103, and the C-shaped arc 1101 also allows the ball head link 12 to swing in a smaller range in any direction perpendicular to the C-shaped opening 1103 or in a range where an included angle with the C-shaped opening 1103 is greater than 0 ° and less than 90 °.

Further, referring to fig. 2, the damping mechanism further includes an elastic member 13 and an elastic member holder 14, and the elastic member 13 is connected between the elastic member holder 14 and the ball-type hinge holder 11. In the embodiment, the proximal hinged support 8, the cross shaft 9, the distal hinged support 10, the spherical hinged support 11, the ball head connecting rod 12, the elastic element 13 and the elastic element support 14 form a group of vibration reduction mechanisms together.

The elastic member 13 may be any suitable elastic member 13 such as a spring, a rubber block, a spring plate, etc., and preferably, as shown in fig. 2, the elastic member 13 is a spring.

In this embodiment, as shown in fig. 12, the elastic member support 14 includes an elastic member positioning pillar 1401 and a blocking pillar 1402 arranged in a step. As shown in fig. 10, the spherical hinge support 11 includes a hinge support body, on which a connecting cylinder 1107 and a step shoulder 1105 are provided; the elastic member 13 has one end sleeved on the connecting cylinder 1107 and one end sleeved on the elastic member positioning column 1401, and in addition, one end of the elastic member 13 is blocked by the step shoulder 1105 and the other end is blocked between the blocking columns 1402. In this embodiment, the step shoulder 1105 and the catch 1402 prevent the elastic member 13 from falling off, and press the elastic member 13.

In addition, as shown in fig. 11, the ball-type hinge support 11 further includes a cylindrical cavity 1104 and a sliding table 1106 provided on the hinge support body. Wherein the cylindrical cavity 1104 is used to connect the C-shaped port 1103 and the step shoulder 1105. The slide table 1106 will be described later. In fig. 10, the C-shaped opening 1103, the cylindrical cavity 1104, the step shoulder 1105, the sliding table 1106, and the connecting cylinder 1107 are arranged in this order from left to right, i.e., in this order along the first direction.

According to the utility model discloses a another aspect provides a buffer cylinder formula flexible connection device, as shown in fig. 2, this buffer cylinder formula flexible connection device includes connection pad 3 and a plurality of basis the utility model discloses a damping mechanism, a plurality of damping mechanism set up and all are connected with connection pad 3 along the periphery interval of connection pad 3, and first direction is the outside direction in the radial center from connection pad 3 along connection pad 3. Preferably, the plurality of vibration reduction mechanisms are uniformly arranged along the circumferential direction of the connection disc 3.

Specifically, the plurality of vibration reduction mechanisms are fixedly connected with the connecting disc 3 in a fixed connection mode such as threaded connection, welding, pasting, clamping and the like. In the embodiment, a lateral threaded rod 303 is arranged on the connecting disc 3, and is fixedly connected with the proximal hinged support 8 through the lateral threaded rod 303.

The number of the vibration reduction mechanisms can be set according to requirements, and can be two, three, four, five, six, seven, eight and the like. The present invention will be described with reference to five examples.

When the damping means are five, the connecting disc 3 is preferably in the shape of a plum blossom, see fig. 5.

In the embodiment, the connecting disc 3 is provided with 5 lateral threaded rods 303 in threaded connection with the proximal hinged support 8, and 5 groups of vibration reduction mechanisms are uniformly distributed on the periphery of the connecting disc 3 at 360 degrees, so that the symmetry and the stability of the device are ensured, and the device can be self-adaptive and can buffer multi-directional complex random loads.

The utility model discloses an above-mentioned damping mechanism and damping mechanism who mentions are the ingenious arrangement of starfish form, can alleviate the impact that random load such as stormy waves class arouses effectively, owing to relieved partial removal and rotatory restraint simultaneously for the device can eliminate concentrated load, especially the great moment of flexure of riser tip effectively.

In this embodiment, the cushion cylinder type flexible connecting device may further include a base plate 2 wrapped outside the plurality of vibration reduction mechanisms, the base plate 2 includes a ring cavity wall 200 and a plurality of casing 201 arranged along a circumferential direction of the ring cavity wall 200, the casing 201 extends along the first direction, and the plurality of spherical hinge supports 11 extend into the plurality of casing 201 in a one-to-one correspondence manner. The ball-type hinge support 11 can move in the casing 201.

In the preferred embodiment of the present invention, the damping mechanism further comprises an elastic member 13 and an elastic member support 14, and the elastic member 13 is connected between the elastic member support 14 and the spherical hinge support 11. At this time, the ball type hinge support 11, the elastic member 13 and the elastic member support 14 are all disposed in the casing 201.

Preferably, a sliding groove 202 extending along the first direction is formed in each casing 201, as shown in fig. 10, the spherical hinge support 11 further includes a sliding table 1106 provided on the spherical hinge support body, and the sliding table 1106 is slidably disposed in the sliding groove 202.

The protective cylinder 201 is a cylindrical cavity with a sliding groove 202, the sliding groove 202 extends along the depth direction of the protective cylinder 201 and is used for placing the spherical hinged support 11, the elastic part 13 and the elastic part support 14, preferably, the protective cylinder 201 and the annular cavity wall 200 are integrated, the sliding groove 202 is matched with the sliding table 1106 to position and guide the spherical hinged support 11, the sliding table 1106 of the spherical hinged support 11 is matched with the sliding groove 202 in the protective cylinder 201, so that the spherical hinged support 11 can only directionally slide along the length direction of the sliding groove 202 and cannot rotate around the axis of the protective cylinder 201 in the protective cylinder 201, the rotation of the spherical hinged support 11 in the protective cylinder 201 is limited, the orientation of the C-shaped opening 1103 is fixed, the direction of the large-amplitude swing of the ball-end connecting rod 12 is limited, and the connecting disc 3 can relatively freely move in a plane.

Specifically, the base plate 2 further comprises a flange plate arranged at an interval with the annular cavity wall 200, and a flange hole 205 is formed in the flange plate; used for connecting with a fixing frame on the FPSO. More specifically, the base plate 2 further includes a stepped groove 203 connected between the annular chamber wall 200 and the flange.

In this embodiment, as shown in fig. 2, the flexible connecting device of the cushion cylinder type further includes a center ball seat 4 and a ball-end hinge rod 6 which are sequentially arranged in a second direction from the center of the base plate 2 to the center of the connecting plate 3; the center ball seat 4 is fixedly connected with the center of the connecting disc 3, the ball head part 604 of the ball head hinge rod 6 is hinged with the ball cavity 402 of the center ball seat 4, and the hinge rod part 603 of the ball head hinge rod 6 is connected with the connecting disc 3. The ball head 604 of the ball-end hinge 6 is arranged in the ball cavity 402, and the ball-end hinge 6 is similar to an umbilical cord and has traction and limiting effects on the connecting disc 3.

As shown in fig. 6, preferably, the center ball seat 4 further includes a conical opening 401, and the ball cavity 402 of the center ball seat 4 and the conical opening 401 are sequentially arranged in the second direction, and the diameter of the conical opening 401 is gradually increased in the second direction. Preferably, the large radius of the cone mouth 401 is 4/5 times the radius of the ball cavity 402, and the small radius is 3/5 times the radius of the ball cavity 402, so that a certain swing of the ball-end hinge rod 6 can be ensured.

Wherein, center ball seat 4 and 2 fixed connection of basic disk can be fixed connection modes such as threaded connection, welding, paste, joint.

Specifically, the center ball seat 4 further comprises a threaded hole 404 for connecting and fixing the center ball seat 4; the base plate 2 is provided with a threaded rod 204, and the threaded hole 404 is in threaded connection with the threaded rod 204 on the base plate 2. The preferred embodiment is threaded connection, and the connection is convenient, firm and reliable. The threaded rod 204 is preferably located at the very center of the bottom of the base plate 2.

The central ball seat 4 further comprises a stepped bore 403; the conical opening 401, the ball cavity 402, the stepped hole 403 and the threaded hole 404 are sequentially arranged along the second direction; stepped bore 403 is used to connect ball cavity 402 and threaded bore 404.

In this embodiment, a central hinge support 7 is disposed between the hinge rod portion 603 of the ball-end hinge rod 6 and the connecting disc 3, one end of the central hinge support 7 is hinged to the hinge rod portion 603 of the ball-end hinge rod 6, and the other end is fixedly connected to the connecting disc 3.

As shown in fig. 8, a threaded hole 701 and a hinge hole 702 are provided on the central hinge support 7, a central threaded rod 302 is provided on the connecting disc 3, and the central hinge support 7 is in threaded connection with the central threaded rod 302 on the connecting disc 3 through the threaded hole 701. The ball-end hinge rod 6 is provided with a hinge hole 601, and the central hinge support 7 is hinged with the hinge hole 601 on the ball-end hinge rod 6 through a hinge hole 702 and a pin 5 (see fig. 1 and 2). Optionally, the ball-end hinge rod 6 is further provided with a tapered surface 602, the tapered surface 602 is located between the hinge hole 601 and the hinge rod portion 603, and the tapered surface 602 plays a role in transition and prevents stress concentration.

In this embodiment, the connecting disc 3 is fixedly connected to the central hinge support 7, the central hinge support 7 is hinged to the ball-end hinge rod 6, and the ball-end hinge rod 6 is hinged to the ball cavity 402 of the central ball seat 4 through a ball head 604 provided thereon, so that the connecting disc 3 cannot move toward the bottom of the base disc 2. On one hand, the connecting disc 3 can be prevented from moving outwards by a large margin (namely, the connecting disc cannot move rightwards along the horizontal direction in fig. 1) to drag the spherical hinge support 11 to be separated from the protective cylinder 201, so that safety accidents are caused; on the other hand, the connection disc 3 is also prevented from moving inward by a large amount (i.e., cannot move rightward in the horizontal direction in fig. 1) and violently colliding against the bottom of the base disc 2.

In this embodiment, the flexible connecting device of the cushion cylinder type further includes a C-shaped fork 1 fixedly connected to the connecting plate 3, as shown in fig. 12, the C-shaped fork 1 includes a ring wall 105, and the ring wall 105 is an inverted circular truncated cone-shaped ring cavity with a notch 106. The diameter of the upper end of the annular wall 105 is larger than that of the lower end, and the inner surface of the annular wall is matched with the shape of the top end of the truncated cone-shaped vertical pipe. Specifically, the width of the gap 106 (i.e., the dimension in the circumferential direction of the annular wall 105) is 1.5 to 2 times the outer diameter of the riser.

Preferably, the C-shaped fork 1 further comprises a ring 104 connected to the lower part of the ring wall 105, and the ring 104 is a small step at the lower part of the ring wall 105, and functions to support the end of the riser and prevent the end of the riser from slipping off.

Specifically, the C-shaped fork 1 is provided with a threaded hole 101, a quincuncial pillar 102 and a trapezoidal platform 103.

In this embodiment, the quincunx column 102 on the C-shaped fork 1 is a fusion of 5 cylinders, and 5 threaded holes 101 are provided thereon, and the quincunx column 102 and the connecting disc 3 have the same structural profile.

Wherein, the connecting disc 3 is provided with a through hole 301 for fixedly connecting with the C-shaped fork 1. In the embodiment shown in fig. 5, a total of 5 through holes 301 are provided in the connecting plate 3 for fixedly connecting with the C-shaped fork 1 by bolts 15.

Wherein, the trapezoid table 103 is positioned between the plum blossom pillar 102 and the annular wall 105, and plays a role of transitional connection.

When the device is used, the truncated cone-shaped end part of the vertical pipe is clamped in the C-shaped fork 1, and the base plate 2 is connected with the floating platform through the flange hole 205.

As shown in fig. 1, fig. 2 and fig. 13, the working principle of the flexible connecting device with buffer cylinder of the present invention is as follows:

firstly, if the C-shaped fork 1 moves up and down relative to the FPSO, the C-shaped fork 1 will drive the connecting disc 3 to move up and down, and move down, the connecting disc 3 drives the proximal hinged support 8, the cross shaft 9 and the distal hinged support 10 to move down, so as to push the ball-end connecting rod 12 and the ball-shaped hinged support 11 to move down, and compress the elastic piece 13a until balancing, meanwhile, the ball-end connecting rods 12 of the vibration reduction mechanisms b, C, d and e all swing down along the C-shaped opening 1103, the elastic piece 13b and the elastic piece 13e are all compressed by a small amplitude, and bear the pressure of the connecting disc 3 moving down with the elastic piece 13a, but the elastic piece 13C and the elastic piece 13d are not stressed, the corresponding ball-shaped hinged support 11 moves towards the port direction of the protection cylinder 201, and the vertical pipe has a similar principle when.

In particular, if the FPSO has a large amplitude heave movement under the action of the wind current, in particular, the FPSO heave movement, the lagging following movement of the riser causes the C-forks 1 to move downwards relative to the base plate 2, i.e., the connecting disc 3, moves downward, thereby forcing the elastic member 13a of the damping mechanism a to be compressed, while the elastic members 13b and 13e of the damping mechanisms b and e are compressed by a small amount, the ball links 12 of the vibration damping mechanisms b and C rotate clockwise along the corresponding C-shaped ports 1103, while the ball links 12 of the damping mechanisms d and e rotate along the corresponding C-shaped openings 1103 counterclockwise, the ball link 12 of the damping mechanism a does not deflect and is pressed against the cylindrical cavity 1104, the sliding platform 1106 on the spherical hinge support 11 slides downwards under the limitation of the sliding slot 202 on the base plate 2, and the elastic element 13 is compressed to a certain extent and balanced as shown in fig. 13.

Secondly, if the FPSO and the riser move in a manner that the FPSO and the riser rotate relative to the axis of the ball joint 6, the connecting disc 3 rotates relative to the base disc 2 and drives the proximal hinge support 8 to rotate, and the distal hinge support 10 and the ball joint rod 12 rotate together around the center of the spherical cavity 1102 of the spherical hinge support 11 in the opposite direction through the C-shaped opening 1103.

Specifically, if the riser rotates clockwise relative to the FPSO, since the end of the riser is clamped in the C-shaped fork 1, the C-shaped fork 1 is fixedly connected with the connecting disc 3, and the base disc 2 is fixedly connected with the FPSO through the flange, the connecting disc 3 rotates clockwise relative to the base disc 2 and drives the proximal hinge support 8 to rotate clockwise, since the cross shaft 9 connects the proximal hinge support 8 and the distal hinge support 10, and the distal hinge support 10 is fixedly connected with the ball-end connecting rod 12 through the thread, and further the distal hinge support 10 and the ball-end connecting rod 12 rotate counterclockwise around the center of the spherical cavity 1102 of the ball-shaped hinge support 11 through the C-shaped opening 1103, when the riser rotates counterclockwise relative to the FPSO, the motion is opposite.

Thirdly, if the C-shaped fork 1 rotates in a downward inclination shape, the connecting disc 3 drives the proximal hinge supports 8 of three abe groups of damping mechanisms to approach towards the bottom of the base disc 2, and drives the proximal hinge supports 8 of two cd groups of damping mechanisms to keep away from the bottom of the base disc 2, because the proximal hinge supports 8 and the distal hinge supports 10 are hinged through a cross shaft 9, the distal hinge supports 10 are fixedly connected with the ball head connecting rod 12 in a threaded manner, and because the spherical hinge supports 11 are provided with C-shaped cambered surfaces 1101, the distal hinge supports 10 and the ball head connecting rod 12 are allowed to rotate in a small range around the center of a spherical cavity 1102 of the spherical hinge supports 11 towards a direction vertical to a C-shaped opening 1103, if the connecting disc 3 needs to further rotate, the spherical hinge supports 11 are inevitably caused to move downwards to compress the elastic members 13a, 13b and 13e, and because the elastic coefficients of the elastic members 13a, 13b and 13e are larger, larger potential energy can be accumulated, and when the, the spherical hinged support 11 stops moving to reach a balanced state, and if the C-shaped fork 1 turns upwards, the similar working principle is achieved.

Specifically, if the C-shaped fork 1 rotates in a downward inclination relative to the base plate 2, as shown in fig. 13, the connection disc 3 drives the proximal hinge supports 8 of the abe three sets of vibration reduction mechanisms to approach towards the bottom of the base plate 2, and drives the proximal hinge supports 8 of the cd two sets of vibration reduction mechanisms to move away from the bottom of the base plate 2, because the proximal hinge supports 8 and the distal hinge supports 10 are hinged through the cross shaft 9, the distal hinge support 10 is fixedly connected with the ball-end connecting rod 12 through the screw thread, and because the spherical hinge support 11 is provided with the C-shaped arc 1101, the distal hinge support 10 and the ball-end connecting rod 12 are allowed to rotate in a small range around the center of the spherical cavity 1102 of the spherical hinge support 11 in a direction perpendicular to the C-shaped opening 1103, because the C-shaped arc 1101 on the spherical hinge support 11 is much smaller than the size of the C-shaped opening 1103, the ball-end connecting rod 12 cannot rotate in a large range in a, the spherical hinged support 11 is forced to move downwards to compress the elastic pieces 13a, 13b and 13e, large potential energy can be stored due to large elastic coefficients of the elastic pieces 13a, 13b and 13e, when the spherical hinged support 11 is compressed to a certain degree, the spherical hinged support 11 stops moving to reach a balance state, and if the C-shaped fork 1 tilts upwards or tilts towards other directions, the same analysis can be carried out.

Compared with the prior art, the utility model provides a buffer cylinder formula flexible connection device's advantage as follows:

1. the utility model provides a buffer cylinder type flexible connection device, if the motion form of FPSO and riser that stormy waves flow and arouse is that the two is rotatory for the axis of bulb hinge-bar, suppose that the riser is rotatory clockwise for FPSO (anticlockwise rotation is the same reason with clockwise), because the foundation plate passes through flange fixed connection with FPSO, the riser tip card is in C shape fork, show that the connection pad is rotatory clockwise for the foundation plate, and drive nearly heart hinged-support clockwise rotation, because the cross axle connects nearly heart hinged-support and far heart hinged-support, and far heart hinged-support and bulb connecting rod screw thread fixed connection, and then ball chamber center around ball of ball-type far heart hinged-support along turning counterclockwise through C shape mouth, the device compares with traditional fixed bolster, increased the degree of freedom of rotation, eliminated the alternating bending moment that arouses because of rotating when fixed rigid connection, the risk of fatigue damage can be greatly reduced.

2. The utility model provides a buffering cylinder formula flexible connection device, when stormy waves flow and arouse FPSO to have and sway by a wide margin, the device allows FPSO and riser to rotate for the axis of round pin axle 5 (the axis of round pin axle 5 is the horizontality) to can slow down the impact load that the rotation arouses. For example, if the C-shaped fork rotates in a downward inclination manner, the connecting disc drives the proximal hinge supports of three abe sets of damping mechanisms to approach towards the bottom of the base disc, the proximal hinge supports of two cd sets of damping mechanisms are driven to be far away from the bottom of the base disc, the proximal hinge supports and the distal hinge supports are hinged through the cross shaft, the distal hinge supports are fixedly connected with the ball head connecting rod through threads, the spherical hinge supports are provided with C-shaped cambered surfaces, the distal hinge supports and the ball head connecting rod are allowed to rotate in a small range around the center of a spherical cavity of the spherical hinge supports in a direction perpendicular to the C-shaped opening, the ball head connecting rod is not allowed to rotate in a large range in the direction perpendicular to the C-shaped opening due to the fact that the C-shaped cambered surfaces on the spherical hinge supports are much smaller than the size of the C-shaped opening, if the connecting disc is further rotated, the spherical hinge supports tend to move downwards to compress the elastic, The elastic coefficients of 13b and 13e are large, so that large potential energy can be stored, when the spherical hinged support is compressed to a certain degree, the spherical hinged support stops moving to reach a balanced state, and the impact of the swing of the FPSO on the end part of the opposite pipe can be effectively buffered. If the C-shaped fork rotates in an upward inclined shape, the device can buffer impact, disperse large bending moment and prolong the fatigue life by the same analysis.

3. The utility model provides a buffer cylinder formula flexible connection device, it has great heaving motion to arouse FPSO and riser when stormy waves flow, for example, FPSO rises suddenly, settle the riser in C shape fork because inertia will be lagged behind FPSO and rise, then the riser can produce decurrent dynamic load power to C shape fork, C shape fork passes through the connection pad and transmits power for damping mechanism a, damping mechanism b and damping mechanism e's ball-type hinged support, ball-type hinged support slides to protecting a section of thick bamboo bottom, and then elastic component 13a, elastic component 13b and elastic component 13e are compressed. The impact on the riser ends can be greatly slowed and dispersed compared to conventional fixed rigid connections. Similarly, no matter which direction the FPSO and riser move relative to each other, there are always 2 or 3 springs of the damping mechanism that are compressed to cushion the impact.

4. The utility model provides a buffering cylinder formula flexible connection device, five groups of damping machines constitute the central symmetrical distribution structure of starfish form, allow C shape fork and connection pad to do translation, dead axle rotation and plane motion as a whole, again because damping mechanism has adopted ball pivot and cross axle hinge simultaneously, then can allow C shape fork and connection pad to do the space motion of minizone as a whole again to cushion corresponding impact.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A vibration damping mechanism, comprising:

the cross hinge assembly comprises a proximal hinge support, a cross shaft and a distal hinge support which are sequentially connected along a first direction;

the spherical hinge assembly comprises a ball head connecting rod and a spherical hinge support with a spherical cavity, the connecting rod part of the ball head connecting rod is fixedly connected with the telecentric hinge support, and the spherical head part of the ball head connecting rod is hinged in the spherical cavity.

2. The damping mechanism according to claim 1, wherein the spherical hinge support comprises a spherical hinge support body, a C-shaped opening is formed in the spherical hinge support body, the spherical cavity is formed in the C-shaped opening, a C-shaped arc surface is arranged at an opening end of the C-shaped opening, and a center line of the C-shaped opening and a center line of the C-shaped arc surface are perpendicularly arranged.

3. The damping mechanism according to claim 1 or 2, further comprising a resilient member and a resilient member mount, the resilient member being connected between the resilient member mount and the ball-type hinge mount.

4. A buffer cylinder type flexible connecting device comprising a connecting disc and a plurality of vibration damping mechanisms according to any one of claims 1 to 3, the plurality of vibration damping mechanisms being disposed at intervals along an outer periphery of the connecting disc and each being connected to the connecting disc, the first direction being a direction outward from a center of the connecting disc in a radial direction of the connecting disc.

5. The buffer cylinder type flexible connecting device according to claim 4, comprising a base plate wrapped outside the plurality of damping mechanisms, wherein the base plate comprises a ring cavity wall and a plurality of protection cylinders arranged along the circumferential direction of the ring cavity wall, the protection cylinders extend along the first direction, and the plurality of spherical hinge supports extend into the plurality of protection cylinders in a one-to-one correspondence manner.

6. The cushion cylinder type flexible connecting device according to claim 5, wherein each of the casings has a sliding groove extending in the first direction, and the spherical hinge support further comprises a sliding table provided on the spherical hinge support body, and the sliding table is slidably disposed in the sliding groove.

7. The buffer cylinder type flexible connecting device as claimed in claim 5, further comprising a center ball seat and a ball joint hinge rod sequentially arranged in a second direction from the center of the base plate to the center of the connecting plate;

the center ball seat is fixedly connected with the center of the connecting disc, the ball head part of the ball head hinged rod is hinged with the ball cavity of the center ball seat, and the hinged rod part of the ball head hinged rod is connected with the connecting disc.

8. The buffer cylinder type flexible connecting device as claimed in claim 7, wherein the central ball seat further comprises a conical opening, the ball cavity of the central ball seat and the conical opening are sequentially arranged along the second direction, and the diameter of the conical opening is gradually increased along the second direction.

9. The buffer cylinder type flexible connecting device as claimed in claim 7, wherein a central hinge support is arranged between the hinge rod part of the ball-end hinge rod and the connecting disc, one end of the central hinge support is hinged with the hinge rod part of the ball-end hinge rod, and the other end of the central hinge support is fixedly connected with the connecting disc.

10. The buffer cylinder type flexible connecting device as claimed in any one of claims 4 to 9, further comprising a C-shaped fork fixedly connected with the connecting disc, wherein the C-shaped fork comprises a ring wall, and the ring wall is an inverted truncated cone-shaped ring cavity with a notch.

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