CN214729511U - Bell-type rotary fluid conveying device - Google Patents

Abstract

The utility model discloses a rotatory fluid delivery device of bell jar formula, include: a rotary joint; the middle rotator is fixedly connected with the upper bell jar to form a bell jar type shell; the middle base is movably connected with the middle rotating body in the radial direction through a slewing bearing, and the bell-type shell can rotate relative to the middle base; the bell-type shell and the middle base form a closed cavity, and the rotary joint is arranged in the closed cavity; a drive plate disposed within the enclosed chamber; and the driving arm is fixedly connected with the driving disc. The utility model discloses the rotary joint who will be used for realizing fluid transport sound conversion sets up in closed cavity, when guaranteeing closed cavity's leakproofness, adopts movable bell jar formula structure, makes closed cavity's bell jar can the free rotation to can ensure that rotary joint's motion joint has sufficient gyration degree of freedom, and then can make the boats and ships pipeline that is connected with rotary joint's motion joint can smoothly make rotary motion around rotary joint.

Description

Bell-type rotary fluid conveying device

Technical Field

The utility model relates to a fluid conveying equipment of ocean engineering, concretely relates to rotatory fluid conveying device of bell jar formula.

Background

The single point mooring system is that the ocean engineering building is tied and fixed on the sea through a single mooring point, and the structure can do 360-degree rotary motion around the mooring point, so that the weathervane effect is utilized to the maximum extent. The structure is always in the position with the minimum resultant load under the offshore water surface operation environment.

In a single point mooring system, if the system is compatible with fluid transportation, a fluid transportation device for realizing dynamic and static conversion of fluid transportation is necessarily a core device of the single point mooring fluid transportation system. The rotary fluid conveying device is a key device for ensuring continuous and safe conveying of pressurized fluid between a single-point mooring fixed part (a submarine pipeline or a submarine laying hose) and a rotating part (a ship). The device has the characteristics of dynamic and gap pressurized operation, so the reliability of dynamic large-diameter rotary sealing is always a main factor for restricting the development of the device. For underwater or submerged environments, the sealing, manufacturing assembly, maintenance, offshore installation and recovery, etc. of the device is more difficult.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a rotatory fluid conveyor of bell jar formula is provided, it can create a sealed environment for rotary joint to guarantee that rotary joint normally works under underwater or the environment that soaks.

In order to solve the technical problem, the utility model discloses rotatory fluid conveying device of bell jar formula's technical solution does:

the method comprises the following steps: a rotary joint 16, the movable ring of which can rotate relative to the fixed ring; the movable ring is connected with the movable joint, and the fixed ring is connected with the static joint; the moving joint and the static joint are communicated with each other; the movable joint is connected with one end of the rotating part conveying pipeline 2, and the static joint is connected with one end of the fixed part conveying pipeline 6; the rotary joint 16 enables the communication of the rotary part delivery line 2 with the fixed part delivery line 6, thus forming a fluid delivery line; the rotating part conveying pipeline 2 is used for connecting ship pipelines, and the fixed part conveying pipeline 6 is used for connecting submarine pipelines; an intermediate rotor 3 fixedly connected to the upper bell jar 1 to form a bell jar housing; a middle base 5 movably connected to the middle rotor 3 by a pivoting support 19, the bell housing being capable of rotating relative to the middle base 5; the bell housing and the middle base 5 form a closed cavity, and the rotary joint 16 is arranged in the closed cavity; a drive plate 15 disposed within the enclosed chamber; a driving plate 15 is fixedly connected with the middle rotating body 3; and a driving arm 30 fixedly connected with the driving disc 15; the drive arm 30 is fixedly connected to the rotating ring of the rotary joint 16.

In another embodiment, the moving ship transmits force to the middle rotating body 3 through the mooring cable, so that the middle rotating body 3 and the upper bell jar 1 rotate around the middle base 5 under the action of the mooring cable; the intermediate rotor 3 drives the driving disk 15 to synchronously rotate, and the driving disk 15 drives the rotating ring of the rotating joint 16 to rotate around the fixed ring through the driving arm 30, so that the bell-jar-shaped shell and the rotating ring of the rotating joint 16 coaxially and synchronously rotate, and the torque load generated by the movement of the ship is released.

In another embodiment, the radial matching part between the middle rotating body 3 and the middle base 5 is provided with at least two dynamic sealing rings and at least two dynamic sealing rings from top to bottom; the dynamic sealing ring and the dynamic sealing ring are arranged at intervals along the axial direction; the lower end of the intermediate rotor 3 is provided with a mud ring 25.

In another embodiment, the dynamic seal ring comprises an annular seal ring body 21-1, the cross section of the seal ring body 21-1 is rectangular, and at least three sealing lips 21-2 extending along the radial direction are formed on the seal ring body 21-1 from top to bottom; and/or the dynamic sealing ring comprises an annular sealing ring body 22-1, a plurality of external sealing lips 22-3 extending along the radial direction are formed at the upper part of the sealing ring body 22-1, and a plurality of elastic sheets 22-2 are arranged in a groove of the sealing ring body 22-1; the outer seal lip 22-3 corresponds to the elastic piece 22-2.

In another embodiment, the rotating ring of the slewing bearing 19 is fixedly connected to the intermediate rotating body 3 by a fastening bolt, and the fixed ring of the slewing bearing 19 is fixedly connected to the intermediate base 5 by a fastening bolt 33, so that the intermediate rotating body 3 can perform a rotating motion relative to the intermediate base 5.

In another embodiment, the driving disc 15 is provided with a driving arm insertion hole, and one end of the driving arm 30 is fixedly inserted into the driving arm insertion hole; the driving arm insertion hole is provided with a buffer elastic member 29 therein, and the buffer elastic member 29 is filled in a gap between the driving arm insertion hole and the driving arm 30.

In another embodiment, the upper part of the middle base 5 is provided with a slewing bearing fixed ring installation seat 5-1, and the slewing bearing fixed ring installation seat 5-1 is provided with a slewing bearing fixed ring installation surface 5-12; a plurality of slewing bearing fixed ring fastening bolt holes 5-11 are formed in the slewing bearing fixed ring mounting seat 5-1 along the circumferential direction, and the fixed ring of the slewing bearing 19 is fixedly connected with the middle base 5 through fastening bolts 33 penetrating through the slewing bearing fixed ring fastening bolt holes 5-11; a rotary joint fixed ring connecting seat 5-2 is formed at the lower part of the middle base 5, and the rotary joint fixed ring connecting seat 5-2 is provided with a rotary joint fixed ring mounting surface 5-22; the rotary joint fixed ring connecting seat 5-2 is provided with a plurality of rotary joint fixed ring fastening bolt holes 5-21 along the circumferential direction, and the fixed ring 16-1 of the rotary joint 16 is fixedly connected with the middle base 5 through fastening bolts 34 penetrating through the rotary joint fixed ring fastening bolt holes 5-21.

In another embodiment, the middle rotor 3 is fixedly connected to the upper bell jar 1 by fastening bolts 31.

In another embodiment, a static seal ring 20 is arranged between the connecting end surface of the upper bell jar 1 and the middle rotating body 3; and/or a static sealing ring 26 is arranged between the connecting end surfaces of the middle base 5 and the lower base 8.

In another embodiment, the middle base 5 is fixedly connected with the lower base 8; the lower base 8 is arranged on an underwater butt joint guide body 10, and the underwater butt joint guide body 10 is sleeved on an underwater butt joint installation foundation 14.

In another embodiment, the lower base 8 is connected to the underwater docking guide 10 by a plurality of circumferentially distributed buffer springs 9.

The utility model discloses the technological effect that can reach is:

the utility model discloses the rotary joint who will be used for realizing fluid transport sound conversion sets up in closed cavity, when guaranteeing closed cavity's leakproofness, adopts movable bell jar formula structure, makes closed cavity's bell jar can the free rotation to can ensure that rotary joint's motion joint has sufficient gyration degree of freedom, and then can make the boats and ships pipeline that is connected with rotary joint's motion joint can smoothly make rotary motion around rotary joint.

The utility model discloses adopt the sealing pattern that moving seal circle and dynamic seal ring combined together between the moving part (be in the rotor) and the static part (be in the base) of closed cavity, be provided with in the fit clearance bottom of moving part and static part simultaneously and keep off the mud ring to can ensure that rotary joint still can have nimble gyration degree of freedom under water.

The utility model discloses a rotary joint still can have nimble gyration degree of freedom under water, consequently the utility model discloses can be used for the deep sea area of ocean to carry out the transport of fuel oil for large-scale boats and ships.

The utility model discloses simple structure, manufacturing and assembly equipment are easy, and it is convenient and the sealing reliability is high to maintain, can be used for under water or the environment that soaks.

Drawings

It is to be understood by those skilled in the art that the following description is merely exemplary in nature and that the principles of the present invention may be applied in numerous ways to achieve many different alternative embodiments. These descriptions are only used to illustrate the general principles of the teachings of the present invention and are not meant to limit the inventive concepts disclosed herein.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the general description given above and the detailed description of the drawings given below, serve to explain the principles of the invention.

The invention will be described in further detail with reference to the following drawings and detailed description:

FIG. 1 is a schematic view of a bell jar rotary fluid transfer device of the present invention;

fig. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic view of the rotating portion piping and driving portion of the present invention;

FIG. 4 is an enlarged schematic view of section A of FIG. 3;

FIG. 5 is an enlarged schematic view of section B of FIG. 3;

FIG. 6 is an enlarged schematic view of section C of FIG. 3;

fig. 7 is a schematic cross-sectional view of the upper half of the present invention;

FIG. 8 is a schematic view of the distribution of the functional compartments of the lower base of the present invention;

fig. 9 is a schematic view of a middle base of the present invention;

fig. 10 is a schematic cross-sectional view of a dynamic seal ring of the present invention;

fig. 11 is a schematic cross-sectional view of a dynamic seal ring of the present invention.

The reference numbers in the figures illustrate:

1 is an upper bell jar, 2 is a rotating part conveying pipeline,

3 is a middle rotating body, 4 is an underwater ship-connecting hose storage coil pipe,

5 is a middle base, 6 is a fixed part conveying pipeline,

7 is an underwater bank hose storage coil pipe, 8 is a lower base,

9 is a buffer spring, 10 is an underwater butt joint guide body,

11 is an upper bell-jar lifting lug, 12 is a traction lug,

13 is a lower base lifting lug, 14 is an underwater butt joint installation foundation,

15 is a driving disk, 16 is a rotary joint,

17 is a watertight hatch door, 18 is a quick butt fastening mechanism,

19 is a pivoting support, 20 is a static sealing ring,

21 is a first dynamic sealing ring, 22 is a first dynamic sealing ring,

23 is a second dynamic sealing ring, 24 is a second dynamic sealing ring,

25 is a mud guard ring, 26 is a static sealing ring,

27 is a machined body, 28 is a steel structure body,

29 is a buffer elastic piece, 30 is a driving arm,

31 is a manual/pneumatic double-action ball valve,

21-1 is a sealing ring body, 21-2 is a sealing lip,

22-1 is a sealing ring body, 22-2 is an elastic sheet,

22-3 is an outer sealing lip.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" and similar words are intended to mean that the elements or items listed before the word cover the elements or items listed after the word and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

As shown in fig. 1 to 7, the bell jar type rotary fluid transfer device of the present invention comprises an upper bell jar 1, an intermediate rotor 3, an intermediate base 5, a lower base 8, an underwater butt joint guide body 10, and an underwater butt joint installation foundation 14;

the upper bell jar 1 is fixedly connected with the middle rotor 3 through a fastening bolt 31, a static sealing ring 20 is arranged between the connecting end surfaces of the upper bell jar 1 and the middle rotor 3, and the static sealing ring 20 can ensure the sealing property between the upper bell jar 1 and the middle rotor 3;

the middle rotating body 3 is sleeved at the top end of the middle base 5, the middle rotating body 3 is movably connected with the middle base 5 through a rotary support 19, so that the axial fixation between the middle rotating body 3 and the middle base 5 is realized, and the middle rotating body 3 can rotate around a shaft relative to the middle base 5; the rotary support 19 is provided with a moving coil and a fixed coil, the moving coil of the rotary support 19 is connected with the middle rotating body 3 through a fastening bolt, the fixed coil of the rotary support 19 is connected with the middle base 5 through a fastening bolt 33, so that the middle rotating body 3 can rotate relative to the middle base 5, and the upper bell jar 1 and the middle rotating body 3 form a rotary bell jar type shell;

the slewing bearing 19 of the present invention is a standard component (standard number JB/T10471-2004), and its working principle is the same as that of a bearing.

The upper bell jar 1, the middle rotating body 3 and the middle base 5 form a closed cavity, and a rotary joint 16 is fixedly arranged in the closed cavity; the rotary joint 16 is provided with a movable ring and a fixed ring, and the movable ring can rotate relative to the fixed ring; the movable ring is connected with the movable joint, and the fixed ring is connected with the static joint; the moving joint and the static joint are communicated with each other; the movable joint is connected with one end of the rotating part conveying pipeline 2, and the static joint is connected with one end of the fixed part conveying pipeline 6; the rotary joint 16 enables the communication of the rotary part delivery line 2 with the fixed part delivery line 6, thus forming a fluid delivery line; a manual/pneumatic double-acting ball valve 31 is arranged on the fluid conveying pipeline and used for controlling whether the fluid conveying pipeline is communicated or not;

a driving disk 15 is also arranged in the closed cavity, and the driving disk 15 is connected with a driving arm 30; the driving disc 15 can drive the driving arm 30 to rotate; the driving disk 15 is fixedly connected with the middle rotating body 3 through a fastening bolt; in a preferred embodiment, the middle rotating body 3, the moving coil of the pivoting support 19 and the driving disk 15 are fixedly connected by the same fastening bolt 32; the driving arm 30 is fixedly connected with the movable ring of the rotary joint 16; the rotation of the driving disc 15 can drive the motion joint of the rotary joint 16 and the middle rotor 3 to synchronously rotate;

as shown in fig. 7, two driving arm insertion holes are axially formed in the driving disc 15, and one end of the driving arm 30 is fixedly inserted into the two driving arm insertion holes; a buffer elastic part 29 is arranged in the driving arm insertion hole, and the buffer elastic part 29 is filled in a radial gap between the driving arm insertion hole and the driving arm 30, so that a buffer effect can be achieved;

the middle rotor 3 and the middle base 5 form a radial fit; a first dynamic sealing ring 21, a first dynamic sealing ring 22, a second dynamic sealing ring 23 and a second dynamic sealing ring 24 are arranged at the radial matching part between the middle rotor 3 and the middle base 5 from top to bottom;

as shown in fig. 10, the dynamic seal rings 21 and 23 include an annular seal ring body 21-1, the cross section of the seal ring body 21-1 is rectangular, and the upper edge, the middle part and the lower edge of the seal ring body 21-1 are respectively provided with a seal lip 21-2 extending along the radial direction, so as to form a seal ring with a star-shaped cross section;

be different for circular shape static seal ring 26 with the cross-section, the utility model discloses a movable seal ring 21, 23 adopt the rectangular cross-section, and form three pairs of sealing lip 21-1 (radial protruding portion promptly) from top to bottom, and movable seal ring 21, 23 of this structure have radial clearance and the coaxial offset of rotor 3 and well base 5 in the buffering when rotor 3 receives the moment of overturning effect, supplementary gyration is stable to can ensure radial gyration's stability.

As shown in FIG. 11, the dynamic seal ring 22, 24 includes an annular seal ring body 22-1, the interior of the seal ring body 22-1 being grooved to form a U-shaped cross-section; the upper part of the sealing ring body 22-1 forms a plurality of external sealing lips 22-3 (i.e. radial protrusions) extending along the radial direction, and a plurality of V-shaped elastic sheets 22-2 (four elastic sheets 22-2 are shown in FIG. 11) are arranged in the groove of the sealing ring body 22-1;

different from the static sealing ring 26 with a circular section, the dynamic sealing rings 22 and 24 of the present invention are provided with an external sealing lip 22-3, and an elastic sheet 22-2 corresponding to the external sealing lip 22-3 is arranged in the internal slot, and two wings of the V-shaped elastic sheet 22-2 are abutted against the external sealing lip 22-3, so that the elastic force of the elastic sheet 22-2 can act on the external sealing lip 22-3, and thus the external sealing lip 22-3 of the dynamic sealing rings 22 and 24 can form a sufficient sealing force between the middle rotating body 3 and the middle base 5 in the rotating motion and the static state of the middle rotating body 3; the dynamic sealing rings 22, 24 thus ensure that the internal pressure of the closed chamber does not leak out, while ensuring that external liquid under pressure does not leak into the closed chamber.

As shown in fig. 4, a mud guard 25 is provided at the bottom end of the middle rotor 3, the mud guard 25 is sleeved on the middle base 5, and the mud guard 25 can prevent silt from entering the radial matching portion between the middle rotor 3 and the middle base 5; the mud guard ring 25 is composed of an elastic retainer and a wear-resistant rubber elastomer;

the outer part of the middle rotating body 3 is fixedly provided with an underwater ship hose storage coil pipe 4; the underwater ship hose storage coil 4 is wound with an underwater ship hose, one end of the underwater ship hose is connected with the other end of the rotating part conveying pipeline 2, and the other end of the underwater ship hose is connected with a ship pipeline;

an underwater landing hose storage coil 7 is fixedly arranged outside the lower base 8; an underwater shore connection hose is wound on the underwater shore connection hose storage coil 7, one end of the underwater shore connection hose is connected with the other end of the fixed part conveying pipeline 6, and the other end of the underwater shore connection hose is connected with a submarine pipeline or a submarine laying hose;

the middle base 5 is fixedly connected with a lower base 8; the middle base 5 and the lower base 8 are fixedly connected through fastening bolts and axial static seals, or the middle base 8 and the lower base 8 are fixedly connected through a welding mode;

the lower base 8 is arranged on an underwater butt joint guide body 10, and the underwater butt joint guide body 10 is sleeved on an underwater butt joint installation foundation 14;

a static sealing ring 26 is arranged between the connecting end surfaces of the middle base 5 and the lower base 8, and the static sealing ring 26 can ensure the sealing property between the middle base 5 and the lower base 8;

the outer edge of the lower base 8 is provided with a machined body 27, and the machined body 27 is used as a part of the lower base 8 and is used for realizing the fixed connection of the lower base 8 and the middle base 5;

the lower part of the lower base 8 forms a non-connection part welding steel structure 28, a cavity is formed inside the steel structure 28, a plurality of watertight doors 17 are arranged in the cavity, the chamber of the lower base is divided into a plurality of cabins by the watertight doors 17, and a manual operation mechanism is arranged on the watertight doors 17; as shown in fig. 8, the lower base 8 has a butt-joint locking equipment cabin I, an underwater submergence replacement cabin II, a gas storage/bilge pump cabin III, a battery and control cabin IV, and a central cabin V;

the lower base 8 is connected with an underwater butt joint guide body 10 through a plurality of buffer springs 9 distributed along the circumferential direction; in the installation process, when the lower base 8 and the underwater butt joint guide body 10 are in underwater butt joint, the buffer spring 9 can play a buffer role;

at least one upper bell jar lifting lug 11 is fixedly arranged on the upper bell jar 1; the upper bell jar lifting lug 11 is used for hoisting the upper bell jar 1;

a plurality of traction lugs 12 are fixedly arranged on the outer part of the intermediate rotating body 3 along the circumferential direction, and the intermediate rotating body 3 is connected with the ship through the traction lugs 12;

a plurality of lower base lifting lugs 13 are fixedly arranged on the lower base 8;

in order to realize underwater automatic butt joint, the lower base 8 is provided with a quick butt joint fastening mechanism 18 for realizing quick butt joint of the underwater butt joint guide body 10 and the underwater butt joint installation foundation 14.

The working principle of the utility model is as follows:

the bell-type rotary fluid conveying device is fixedly arranged under water (such as a position with water depth of 60 meters) through an underwater butt joint installation foundation 14, a fixed part conveying pipeline 6 is connected with a submarine pipeline fixedly arranged on the seabed or a submarine laying hose through an underwater landing hose, and a rotating part conveying pipeline 2 is connected with a ship pipeline floating on the sea through an underwater landing hose;

the ship floating on the sea is always in a motion state under the action of wind waves; the moving ship transfers force to the middle rotating body 3 through the mooring cable, so that the middle rotating body 3 and the upper bell jar 1 rotate around the middle base 5 under the action of the mooring cable; meanwhile, the intermediate rotating body 3 drives the driving disc 15 to synchronously rotate, the driving disc 15 drives the driving arm 30, and the driving arm 30 drives the rotating ring of the rotating joint 16 to rotate around the fixed ring, so that the rotating bell-type shell and the rotating ring of the rotating joint 16 coaxially rotate synchronously to release the torque force generated by the movement of the ship.

The utility model discloses set up rotary joint 16 in the closed cavity, closed cavity can avoid rotary joint 16 to soak in aqueous to guarantee rotary joint 16's normal operating.

Because the sealed cavity is under deep water in the using process, the outer wall of the sealed cavity needs to bear larger water pressure; and, want to guarantee the normal operating of rotary joint 16, the rotation bell jar formula shell that goes up bell jar 1 and well rotor 3 and form should be able to rotate in a flexible way, consequently, the utility model discloses not only will guarantee the leakproofness of closed cavity in order to avoid water to get into closed cavity, still need to guarantee in the rotor 3 for the nimble rotation of well base 5, for this reason, the utility model discloses an aspect is between the connection terminal surface of last bell jar 1 and well rotor 3 to and be provided with the static sealing washer between the connection terminal surface of well base 5 and lower base 8 respectively, radial cooperation portion between well rotor 3 and well base 5 is provided with twice movable sealing washer and dynamic seal ring simultaneously, thereby when guaranteeing bell jar formula shell radial gyration is stable, guarantees that outside area pressure liquid does not leak to closed cavity.

As shown in fig. 9, a slewing bearing fixed ring mounting seat 5-1 is formed at the upper part of the middle base 5, and the slewing bearing fixed ring mounting seat 5-1 is provided with a slewing bearing fixed ring mounting surface 5-12; a plurality of slewing bearing fixed ring fastening bolt holes 5-11 are formed in the slewing bearing fixed ring mounting seat 5-1 along the circumferential direction, and the fixed ring of the slewing bearing 19 is fixedly connected with the middle base 5 through fastening bolts 33 penetrating through the slewing bearing fixed ring fastening bolt holes 5-11;

a rotary joint fixed ring connecting seat 5-2 is formed at the lower part of the middle base 5, and the rotary joint fixed ring connecting seat 5-2 is provided with a rotary joint fixed ring mounting surface 5-22; the rotary joint fixed ring connecting seat 5-2 is provided with a plurality of rotary joint fixed ring fastening bolt holes 5-21 along the circumferential direction, and the fixed ring 16-1 of the rotary joint 16 is fixedly connected with the middle base 5 through fastening bolts 34 penetrating through the rotary joint fixed ring fastening bolt holes 5-21;

the coaxiality and the plane verticality of the slewing bearing fixed ring installation surface 5-12 and the rotary joint fixed ring installation surface 5-22 are the core for ensuring the whole motion relation.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications of the present invention fall within the scope of the claims and their equivalent technologies, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A bell jar rotary fluid transfer apparatus, comprising:

a rotary joint (16) which enables the rotary motion of the movable ring relative to the fixed ring; the movable ring is connected with the movable joint, and the fixed ring is connected with the static joint; the moving joint and the static joint are communicated with each other; the movable joint is connected with one end of the rotating part conveying pipeline (2), and the static joint is connected with one end of the fixed part conveying pipeline (6); the rotary joint (16) can realize the communication between the rotary part conveying pipeline (2) and the fixed part conveying pipeline (6) so as to form a fluid conveying pipeline; the rotating part conveying pipeline (2) is used for connecting a ship pipeline, and the fixed part conveying pipeline (6) is used for connecting a submarine pipeline;

an intermediate rotor (3) fixedly connected with the upper bell jar (1) to form a bell jar type shell;

a middle base (5) which is movably connected with the middle rotating body (3) through a slewing bearing (19), and the bell housing can rotate relative to the middle base (5); the bell-jar type shell and the middle base (5) form a closed cavity, and the rotary joint (16) is arranged in the closed cavity;

a drive plate (15) disposed within the closed chamber; a driving disc (15) is fixedly connected with the middle rotating body (3); and

a drive arm (30) fixedly connected to the drive disc (15); the driving arm (30) is fixedly connected with the movable ring of the rotary joint (16).

2. The bell jar rotary fluid transfer device of claim 1, wherein: at least two dynamic sealing rings and at least two dynamic sealing rings are arranged at the radial matching part between the middle rotating body (3) and the middle base (5) from top to bottom; the dynamic sealing ring and the dynamic sealing ring are arranged at intervals along the axial direction; the bottom end of the middle rotating body (3) is provided with a mud guard ring (25).

3. The bell jar rotary fluid transfer device of claim 2, wherein: the dynamic sealing ring comprises an annular sealing ring body (21-1), the section of the sealing ring body (21-1) is rectangular, and at least three sealing lips (21-2) extending along the radial direction are formed on the sealing ring body (21-1) from top to bottom;

and/or the dynamic sealing ring comprises an annular sealing ring body (22-1), a plurality of external sealing lips (22-3) extending along the radial direction are formed at the upper part of the sealing ring body (22-1), and a plurality of elastic sheets (22-2) are arranged in a groove of the sealing ring body (22-1); the external sealing lip (22-3) corresponds to the elastic sheet (22-2).

4. The bell jar rotary fluid transfer device of claim 1, wherein: the rotating ring of the slewing bearing (19) is fixedly connected with the middle rotating body (3) through a fastening bolt, and the fixed ring of the slewing bearing (19) is fixedly connected with the middle base (5) through a fastening bolt (33), so that the middle rotating body (3) can rotate relative to the middle base (5).

5. The bell jar rotary fluid transfer device of claim 1, wherein: a driving arm insertion hole is formed in the driving disc (15), and one end of the driving arm (30) is fixedly arranged in the driving arm insertion hole in a penetrating mode; the driving arm insertion hole is internally provided with a buffering elastic part (29), and the buffering elastic part (29) is filled in a gap between the driving arm insertion hole and the driving arm (30).

6. The bell jar rotary fluid transfer device of claim 1, wherein: a slewing bearing fixed ring mounting seat (5-1) is formed at the upper part of the middle base (5), and the slewing bearing fixed ring mounting seat (5-1) is provided with a slewing bearing fixed ring mounting surface (5-12); a plurality of slewing bearing fixed ring fastening bolt holes (5-11) are formed in the slewing bearing fixed ring mounting seat (5-1) along the circumferential direction, and the fixed ring of the slewing bearing (19) is fixedly connected with the middle base (5) through fastening bolts (33) penetrating through the slewing bearing fixed ring fastening bolt holes (5-11);

a rotary joint fixed ring connecting seat (5-2) is formed at the lower part of the middle base (5), and the rotary joint fixed ring connecting seat (5-2) is provided with a rotary joint fixed ring mounting surface (5-22); the rotary joint fixed ring connecting seat (5-2) is provided with a plurality of rotary joint fixed ring fastening bolt holes (5-21) along the circumferential direction, and the fixed ring (16-1) of the rotary joint (16) is fixedly connected with the middle base (5) through fastening bolts (34) penetrating through the rotary joint fixed ring fastening bolt holes (5-21).

7. The bell jar rotary fluid transfer device of claim 1, wherein: the middle rotating body (3) is fixedly connected with the upper bell jar (1) through a fastening bolt (31).

8. The bell jar rotary fluid transfer device of claim 1, wherein: a static sealing ring (20) is arranged between the connecting end surface of the upper bell jar (1) and the middle rotating body (3); and/or a static sealing ring (26) is arranged between the connecting end surfaces of the middle base (5) and the lower base (8).

9. The bell jar rotary fluid transfer device of claim 1, wherein: the middle base (5) is fixedly connected with a lower base (8); the lower base (8) is arranged on the underwater butt joint guide body (10), and the underwater butt joint guide body (10) is sleeved on the underwater butt joint installation foundation (14).

10. The bell jar rotary fluid transfer device of claim 9, wherein: the lower base (8) is connected with the underwater butt joint guide body (10) through a plurality of buffer springs (9) distributed along the circumferential direction.

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