CN212028843U

CN212028843U - LNG loading and unloading arm rotary joint

Info

Publication number: CN212028843U
Application number: CN202020581959.XU
Authority: CN
Inventors: 万永尧; 张言超; 王润泽; 夏文好
Original assignee: Qingdao Petrochemical M&i Engineering Co ltd
Current assignee: Qingdao Petrochemical M&i Engineering Co ltd
Priority date: 2020-04-19
Filing date: 2020-04-19
Publication date: 2020-11-27
Anticipated expiration: 2030-04-19

Abstract

The utility model relates to a LNG loading arm rotary joint, it includes inner skleeve, mounting flange, rotates the flange, the inner skleeve is equipped with outer fixed sleeve and outer rotating sleeve outside, fill with the ball between outer fixed sleeve and the outer rotating sleeve, the outer fixed sleeve is fixedly mounted on the inner skleeve through the bolted connection spare, the mounting flange closes on the outer fixed sleeve through the bolted connection spare, the rotating flange closes on the outer rotating sleeve through the bolted connection spare; a static sealing ring is arranged between the inner sleeve and the fixed flange, an outer dynamic sealing ring is arranged between the fixed flange and the outer rotating sleeve, and an inner dynamic sealing ring is arranged between the inner sleeve and the rotating flange. The LNG loading and unloading arm rotary joint utilizes the inner dynamic sealing ring and the outer dynamic sealing ring to comprehensively seal the joint position of the rotating part and the fixed part, so that the LNG conveying efficiency and the safety of the loading and unloading arm are ensured; the inner and outer dynamic sealing rings are arranged between the inner sleeve and the rotating flange in a staggered manner for radial complementation, so that the loss of sealing performance caused by rotational abrasion is avoided.

Description

LNG loading and unloading arm rotary joint

Technical Field

The utility model relates to a LNG receiving station equipment field, concretely relates to LNG loading and unloading arm rotary joint.

Background

The LNG receiving station is a large-scale device which is applied to the butt joint of a port terminal and a ship pipeline for fluid unloading. The loading arm front end pipe joint of LNG receiving station connects through rotary joint, and rotary joint is as the essential component part of low temperature unloading arm, and the leakproofness between its relative rotary part is to guaranteeing LNG and send out efficiency and complete machine security crucial. The existing loading arm rotary joint and the sealing between the rotary joint and the fixing part are mostly single-layer annular sealing rings, and even if the improvement of the abrasion resistance of the material of the rubber ring is improved at present, the single structural form still cannot avoid the reduction of the sealing performance of the dynamic sealing position after the loading arm runs for a long time.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is how to overcome current LNG loading and unloading arm rotary joint leakproofness problem, provide one kind and can carry out comprehensive sealing to rotating part and fixed part joint position to reduce the friction loss, guarantee the LNG loading and unloading arm rotary joint of loading and unloading arm LNG transport efficiency and security.

The LNG loading arm rotary joint comprises an inner sleeve, a fixed flange fixedly connected to one side of the inner sleeve, and a rotary flange rotatably connected to the other side of the inner sleeve, wherein an outer fixed sleeve and an outer rotary sleeve are arranged outside the inner sleeve; and a static sealing ring is arranged between the inner sleeve and the fixed flange, an outer dynamic sealing ring is arranged between the fixed flange and the outer rotating sleeve, and an inner dynamic sealing ring is arranged between the inner sleeve and the rotating flange. The joint position of the rotating part and the fixing part is comprehensively sealed by utilizing the inner dynamic sealing ring and the outer dynamic sealing ring, so that the LNG conveying efficiency and the safety of the loading and unloading arm are ensured.

Further, the inner skleeve with it is equipped with the annular and follows to rotate the flange link, and interior dynamic seal circle is including setting up at stiff end sealing washer and rotation end sealing washer, wherein the stiff end sealing washer sets up in the annular of inner skleeve is concave along, outer fixed cover, the clearance that the rotation flange formed, rotate between sleeve and the rotation flange including the end sealing washer sets up, stiff end sealing washer and the coaxial setting of rotation end sealing washer rotate the end sealing washer, and it is inboard that rotation end sealing washer projection is located the stiff end sealing washer. The inner and outer dynamic sealing rings are arranged between the inner sleeve and the rotating flange in a staggered manner for radial complementation, so that the loss of sealing performance caused by rotational abrasion is avoided.

As a structural scheme, the outer dynamic sealing ring and the inner dynamic sealing ring are rubber sealing rings with tension grooves in the centers and cross sections in a shape of a Chinese character 'ji'. The tension groove enables the sealing ring to be in balance of rotating friction and pasting sealing under the condition of dynamic contact, so that under the condition of ensuring the required tension for sealing, the abrasion of a contact surface is reduced as much as possible.

As a structural scheme, the outer dynamic sealing ring and the inner dynamic sealing ring both comprise a fastener with an I-shaped section and circular rubber strips embedded in grooves on two sides of the fastener. The round rubber strip serving as the sealing element is easy to manufacture, low in material requirement and convenient to replace.

The utility model relates to a LNG loading arm rotary joint's beneficial effect does:

the joint position of the rotating part and the fixing part is comprehensively sealed by utilizing inner and outer dynamic sealing rings, so that the LNG conveying efficiency and safety of the loading and unloading arm are ensured;

the inner and outer dynamic sealing rings are arranged between the inner sleeve and the rotating flange in a staggered manner for radial complementation, so that the loss of sealing performance caused by rotational abrasion is avoided;

by improving the structure of the dynamic sealing ring, the dynamic sealing ring is balanced in rotating friction and applying sealing, and the durability of the sealing element is further improved.

Drawings

The utility model relates to a LNG loading arm rotary joint is explained further below with the accompanying drawing:

FIG. 1 is a schematic longitudinal half-section view of the present LNG loading arm swivel;

fig. 2 is a sectional structural view of a dynamic seal ring in the present LNG loading arm rotary joint embodiment 1;

fig. 3 is a sectional view of the dynamic seal ring in embodiment 2 of the LNG loading/unloading arm rotary joint.

In the figure:

1-inner sleeve, 2-fixed flange, 3-rotating flange, 4-outer fixed sleeve, 5-outer rotating sleeve, 6-ball, 7-bolt connecting piece, 8-static sealing ring, 9-outer dynamic sealing ring, 10-inner dynamic sealing ring, 11-rubber ring, 12-fastener and 13-round rubber strip;

101-fixed end seal ring, 102-rotating end seal ring.

Detailed Description

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it is to be understood that the terms "left", "right", "front", "back", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Embodiment 1: as shown in fig. 1 and 2, the LNG loading arm swivel joint includes an inner sleeve 1, a fixed flange 2 fixedly connected to one side of the inner sleeve 1, and a rotating flange 3 rotatably connected to the other side of the inner sleeve 1, wherein an outer fixed sleeve 4 and an outer rotating sleeve 5 are disposed outside the inner sleeve 1, two ball grooves are disposed between the outer fixed sleeve 4 and the outer rotating sleeve 5, and balls 6 are filled in the ball grooves, the outer fixed sleeve 4 is fixedly mounted on the inner sleeve 1 through a bolt connector 7, the fixed flange 2 is coupled to the outer fixed sleeve 4 through a bolt connector 7, and the rotating flange 3 is coupled to the outer rotating sleeve 5 through a bolt connector 7; a static sealing ring 8 is arranged between the inner sleeve 1 and the fixed flange 2, an outer dynamic sealing ring 9 is arranged between the fixed flange 2 and the outer rotating sleeve 5, and an inner dynamic sealing ring 10 is arranged between the inner sleeve 1 and the rotating flange 3. The inner dynamic sealing ring and the outer dynamic sealing ring comprehensively seal the joint position of the rotating part and the fixing part, and the LNG conveying efficiency and the safety of the loading and unloading arm are ensured.

Inner skleeve 1 with it is equipped with the annular and follows to rotate 3 links of flange, and interior dynamic seal ring 10 is including setting up at stiff end sealing washer 101 and rotation end sealing washer 102, wherein stiff end sealing washer 101 sets up in the annular of inner skleeve 1 is along, the clearance of outer fixed cover 4, the formation of rotating flange 3, sleeve 1 and rotation flange 3 between including rotating end sealing washer 102 sets up, stiff end sealing washer 101 and the coaxial setting of rotation end sealing washer 102 rotate end sealing washer 102, and it is inboard that rotation end sealing washer 102 projection is located stiff end sealing washer 101. The inner and outer dynamic sealing rings are arranged between the inner sleeve and the rotating flange in a staggered manner for radial complementation, so that the loss of sealing performance caused by rotational abrasion is avoided.

The outer dynamic sealing ring 9 and the inner dynamic sealing ring 10 are both rubber sealing rings 11 with tension grooves in the centers and cross sections in a shape of a Chinese character 'ji'. The tension groove enables the sealing ring to be in balance of rotating friction and pasting sealing under the condition of dynamic contact, so that under the condition of ensuring the required tension for sealing, the abrasion of a contact surface is reduced as much as possible.

Embodiment 2: as shown in fig. 3: the LNG loading arm rotary joint is characterized in that the outer dynamic sealing ring 9 and the inner dynamic sealing ring 10 both comprise a fastener 12 with an I-shaped section and circular rubber strips 13 embedded in grooves on two sides of the fastener 12. The round rubber strip serving as the sealing element is easy to manufacture, low in material requirement and convenient to replace. The remaining components and structures are as described in embodiment 1, but omitted.

The LNG loading and unloading arm rotary joint utilizes the inner dynamic sealing ring and the outer dynamic sealing ring to comprehensively seal the joint position of the rotating part and the fixed part, so that the LNG conveying efficiency and the safety of the loading and unloading arm are ensured; the inner and outer dynamic sealing rings are arranged between the inner sleeve and the rotating flange in a staggered manner for radial complementation, so that the loss of sealing performance caused by rotational abrasion is avoided; by improving the structure of the dynamic sealing ring, the dynamic sealing ring is balanced in rotating friction and applying sealing, and the durability of the sealing element is further improved.

The above description shows the main features, the basic principles, and the advantages of the invention. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments or examples, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The foregoing embodiments or examples are therefore to be considered in all respects illustrative and not restrictive. The scope of the invention is indicated by the appended claims rather than by the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a LNG loading arm rotary joint, characterized by: comprises an inner sleeve (1), a fixed flange (2) fixedly connected with one side of the inner sleeve (1), and a rotating flange (3) rotatably connected with the other side of the inner sleeve (1), wherein,

an outer fixing sleeve (4) and an outer rotating sleeve (5) are arranged outside the inner sleeve (1), two ball grooves are formed between the outer fixing sleeve (4) and the outer rotating sleeve (5), balls (6) are filled in the ball grooves, the outer fixing sleeve (4) is fixedly installed on the inner sleeve (1) through a bolt connecting piece (7), the fixing flange (2) is combined on the outer fixing sleeve (4) through the bolt connecting piece (7), and the rotating flange (3) is combined on the outer rotating sleeve (5) through the bolt connecting piece (7); a static sealing ring (8) is arranged between the inner sleeve (1) and the fixed flange (2), an outer dynamic sealing ring (9) is arranged between the fixed flange (2) and the outer rotating sleeve (5), and an inner dynamic sealing ring (10) is arranged between the inner sleeve (1) and the rotating flange (3).

2. An LNG loading arm swivel joint as claimed in claim 1, wherein: inner skleeve (1) with it is equipped with the annular and concavely follows to rotate flange (3) link, and interior dynamic seal circle (10) is including setting up at stiff end sealing washer (101) and rotation end sealing washer (102), wherein stiff end sealing washer (101) set up in the annular of inner skleeve (1) is concavely along, outer fixed cover (4), rotate in the clearance that flange (3) formed, rotate and set up between inner skleeve (1) and rotation flange (3) end sealing washer (102), stiff end sealing washer (101) and rotation end sealing washer (102) coaxial setting rotate end sealing washer (102) projection and are located stiff end sealing washer (101) inboardly.

3. An LNG loading arm swivel joint as claimed in claim 2, wherein: the outer dynamic sealing ring (9) and the inner dynamic sealing ring (10) are both rubber sealing rings (11) with tension grooves in the centers and cross sections in a shape of 'V'.

4. An LNG loading arm swivel joint as claimed in claim 2, wherein: the outer dynamic sealing ring (9) and the inner dynamic sealing ring (10) both comprise a fastener (12) with an I-shaped section and circular rubber strips (13) embedded in grooves on two sides of the fastener (12).