Upper-mounted swan neck pipe assembly, rotary connecting head and installation method thereof

Abstract

This invention belongs to the field of pipe fitting technology, specifically relating to a rotary joint for loading arms, and more particularly to a loading arm assembly, a rotary connector, and its installation method. The rotary connector incorporates an auxiliary installation component within an annular mounting cavity between the connecting pipe and the sleeve. When the annular sealing ring is inserted into the cavity, a drive ring compresses the inner clamping member, causing it to rotate towards the outer clamping ring. This, combined with the inner clamping member, compresses the outer wall of the annular sealing ring inwards and the inner wall outwards, preventing axial deformation during installation. After releasing the compression of the outer and inner walls of the annular sealing ring, it is directly fitted onto the connecting pipe and abuts against the inner wall of the sleeve, completing the seal between the sleeve and the connecting pipe. Furthermore, the auxiliary installation component, after installation, can be snapped onto the inner wall of the sleeve, providing positioning and fixation, further enhancing the overall sealing stability of the rotary connector.

Description

Technical Field

[0001] This invention belongs to the field of pipeline connector technology, specifically relating to a rotary joint for loading arm connection, and more particularly to an upper loading arm assembly, a rotary connector and its installation method. Background Technology

[0002] Rotary joints, as key components in fluid transport pipeline systems, are widely used in various pipeline connection scenarios that require relative rotational movement, especially in loading and unloading equipment such as loading arms, to achieve flexible rotation and reliable sealing between pipelines and tank trucks.

[0003] In related technologies, to ensure good sealing performance, multiple annular sealing rings are often installed in an annular mounting cavity between the connecting pipe and the sleeve. Due to the narrow installation space and the inherent elasticity and deformation characteristics of the sealing rings, it is difficult to accurately insert multiple sealing rings into the annular mounting cavity sequentially. When pressing the annular sealing ring into the annular mounting cavity, the sealing lip of the annular sealing ring is prone to axial deformation, thus affecting the sealing effect of the annular sealing ring.

[0004] Therefore, how to prevent the annular seal from undergoing axial deformation when it is installed in the annular mounting cavity is a technical problem that urgently needs to be solved.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0006] This disclosure provides at least one upper loading arm assembly, a rotary connector, and a method for installing the same.

[0007] In a first aspect, embodiments of this disclosure provide a rotary connector, comprising: Connecting pipe; A sleeve is fitted onto the connecting pipe, and the sleeve is rotatably connected to the connecting pipe; An annular mounting cavity is provided between the inner wall of the sleeve and the outer wall of the connecting pipe; The annular mounting cavity is provided with a plurality of annular sealing rings, auxiliary mounting components and bearings in sequence, and the annular sealing rings, auxiliary mounting components and bearings are sleeved on the connecting pipe; The auxiliary installation component is configured to sequentially insert multiple annular sealing rings into the annular installation cavity and then snap onto the inner wall of the sleeve to limit the multiple annular sealing rings. The auxiliary installation components include: The outer wall of the ring body extends axially toward the annular sealing ring to form an outer clamping ring; The inner wall of the ring body is hinged with multiple inner clamping members; A drive ring, which is engaged with the side of the ring body away from the annular sealing ring; When the annular sealing ring is installed into the annular mounting cavity, the driving ring squeezes the inner clamping member to rotate toward the outer clamping ring, so that the outer wall of the annular sealing ring is squeezed inward and the inner wall is squeezed outward by the outer clamping ring and the inner clamping member.

[0008] In one optional embodiment, the sidewall of the drive ring is provided with a plug-in block, which is slidably connected to the plug-in groove of the ring body. A retaining ring is disposed on the inner wall of the drive ring and located below the inner clamping member; When the drive ring is inserted into the insertion groove by an external force, the annular sealing ring is clamped by the outer clamping ring and the inner clamping member, and the inner clamping member is flipped outward by the abutment ring to squeeze the outer wall of the annular sealing ring inward and the inner wall outward.

[0009] In one alternative embodiment, the outer sidewall of the ring body is elastically connected with a plurality of snap-fit ​​blocks in a radially outward direction; A slot is provided at the fitting point between the sleeve and the snap-fit ​​block; A pressing plate is provided at the fitting point between the drive ring and the snap-fit ​​block; When the drive ring is inserted into the insertion slot by an external force, the compression plate compresses the snap-fit ​​block radially inward to disengage the snap-fit ​​block from the slot.

[0010] In one alternative embodiment, the inner clamping member includes: An arc-shaped clamping plate is hinged to the ring body via a rotating shaft; Multiple arc-shaped clamping plates are arranged circumferentially along the inner wall of the ring body.

[0011] In one optional embodiment, the contact surface between the outer clamping ring and the annular sealing ring is an open, inclined arc surface, so that the outer clamping ring can be inserted into the outer wall of the annular sealing ring.

[0012] In one optional embodiment, after the annular sealing ring is installed into the annular mounting cavity, the outer clamping ring is first pulled outward to disengage from the outer wall of the annular sealing ring. At this time, the inner clamping member abuts against the inner wall of the annular sealing ring. Then, the driving ring is pulled outward to disengage the inner clamping member from the inner wall of the annular sealing ring.

[0013] In one optional embodiment, the annular sealing ring is C-shaped; The number of annular sealing rings is three; In this arrangement, after the openings of the two annular sealing rings are positioned opposite each other, they are first placed in the annular mounting cavity. Then, the last annular sealing ring is placed back-to-back with the middle annular sealing ring.

[0014] In one optional embodiment, the ring body and the drive ring are respectively provided with a first insertion hole and a second insertion hole on the side away from the annular sealing ring, so as to allow an external push rod to be inserted to push the ring body and the drive ring to move.

[0015] Secondly, embodiments of this disclosure also provide an upper loading arm assembly, which includes a plurality of rotary connectors as described above.

[0016] Thirdly, this disclosure also provides an installation method using the rotary connector as described above, the installation method comprising: Insert the connecting tube into the sleeve; The annular sealing rings are sequentially installed into the annular mounting cavity using the auxiliary installation components. The drive ring squeezes the inner clamping member to move towards the outer clamping ring, so that the outer wall of the annular seal ring is squeezed inward and the inner wall is squeezed outward by the outer clamping ring and the inner clamping member; Insert the ring body into the sleeve; Fit the bearing onto the connecting pipe.

[0017] The beneficial effects of this invention are as follows: By setting an auxiliary installation component in the annular mounting cavity between the connecting pipe and the sleeve, when the annular sealing ring is installed into the annular mounting cavity, the driving ring squeezes the inner clamping member to rotate towards the outer clamping ring, so that the outer clamping ring and the inner clamping member work together to squeeze the outer wall of the annular sealing ring inward and the inner wall outward, thus avoiding axial deformation of the annular sealing ring during installation. After releasing the compression on the outer and inner walls of the annular sealing ring, the annular sealing ring is directly sleeved on the connecting pipe and abuts against the inner wall of the sleeve, completing the seal between the sleeve and the connecting pipe. Moreover, after installation, the auxiliary installation component can be snapped onto the inner wall of the sleeve, playing a role in limiting and fixing, further improving the overall sealing stability of the rotary connector.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A cross-sectional view of a rotary connector provided in an embodiment of this disclosure; Figure 2 A cross-sectional view of the annular sealing ring and auxiliary installation assembly provided in an embodiment of this disclosure; Figure 3 A schematic diagram showing the state of the auxiliary installation assembly provided in this embodiment of the present disclosure clamping the front of the annular sealing ring; Figure 4 A schematic diagram showing the state of the auxiliary installation assembly provided in this embodiment of the present disclosure when the annular sealing ring is clamped on the reverse side; Figure 5 A schematic diagram showing the state of the push rod when it is engaged with the auxiliary installation component according to an embodiment of this disclosure; Figure 6 This is a schematic diagram of the upper loading arm assembly provided in an embodiment of the present disclosure; Figure 7 A flowchart illustrating the installation method of the rotary connector provided in this embodiment.

[0022] In the diagram: 100, connecting pipe; 200, sleeve; 210, annular mounting cavity; 220, annular sealing ring; 230, auxiliary mounting assembly; 231, ring body; 2311, snap-fit ​​block; 232, outer clamping ring; 233, inner clamping component; 2331, arc-shaped clamping plate; 2332, rotating shaft; 234, drive ring; 2341, insertion block; 2342, insertion groove; 2343, abutment ring; 2344, extrusion plate; 2345, first insertion hole; 2346, second insertion hole; 240, bearing; 250, slot; 300, push rod; 310, first drive rod; 311, insertion rod; 320, second drive rod; 321, insertion hole; 400, rotating connector. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0025] Research has shown that, to ensure good sealing performance, multiple annular sealing rings are often installed within the annular mounting cavity between the connecting pipe and the sleeve. Due to the narrow installation space and the inherent elasticity and deformation characteristics of the sealing rings, accurately inserting multiple sealing rings sequentially into the annular mounting cavity is quite difficult. When pressing the annular sealing ring into the cavity, the sealing lip of the annular sealing ring is prone to axial deformation, thus affecting its sealing effect.

[0026] Based on the above research, this disclosure provides an upper loading arm assembly, a rotary connector 400, and its installation method. An auxiliary installation component 230 is provided within the annular mounting cavity 210 between the connecting pipe 100 and the sleeve 200. When the annular sealing ring 220 is installed into the annular mounting cavity 210, the driving ring 234 presses the inner clamping member 233 to rotate towards the outer clamping ring 232. This causes the outer clamping ring 232 and the inner clamping member 233 to work together to press the outer wall of the annular sealing ring 220 inwards and the inner wall... The annular seal 220 is squeezed outward to prevent axial deformation during installation. After the compression of the outer and inner walls of the annular seal 220 is released, the annular seal 220 is directly fitted onto the connecting pipe 100 and abuts against the inner wall of the sleeve 200, thus completing the seal between the sleeve 200 and the connecting pipe 100. Moreover, the auxiliary installation component 230 can be snapped onto the inner wall of the sleeve 200 after installation, which plays a role in limiting and fixing, further improving the overall sealing stability of the rotary connector 400.

[0027] The shortcomings of the above solutions are the result of the inventors' practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present disclosure embodiments in this article should be considered as contributions made by the inventors during the development of the present disclosure embodiments.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Please see Figure 1 and Figure 2At least one embodiment provides a rotary connector 400, comprising: a connecting pipe 100; a sleeve 200 sleeved on the connecting pipe 100, and the sleeve 200 being rotatably connected to the connecting pipe 100; an annular mounting cavity 210 is formed between the inner wall of the sleeve 200 and the outer wall of the connecting pipe 100; a plurality of annular sealing rings 220, an auxiliary mounting assembly 230, and a bearing 240 are sequentially arranged in the annular mounting cavity 210, and the annular sealing rings 220, the auxiliary mounting assembly 230, and the bearing 240 are sleeved on the connecting pipe 100; the auxiliary mounting assembly 230 is configured to engage the sleeve after the plurality of annular sealing rings 220 are sequentially inserted into the annular mounting cavity 210. On the inner wall of the tube 200, multiple annular sealing rings 220 are limited; the auxiliary installation assembly 230 includes: a ring body 231, the outer side wall of which extends axially toward the annular sealing ring 220 to form an outer clamping ring 232; multiple inner clamping members 233 are hinged to the inner side wall of the ring body 231; a drive ring 234 is engaged with the side of the ring body 231 away from the annular sealing ring 220; when the annular sealing ring 220 is installed into the annular mounting cavity 210, the drive ring 234 squeezes the inner clamping members 233 toward the outer clamping ring 232 to rotate, so that the outer wall of the annular sealing ring 220 is squeezed inward and the inner wall is squeezed outward by the outer clamping ring 232 and the inner clamping members 233.

[0031] By providing an auxiliary installation component 230 within the annular mounting cavity 210 between the connecting pipe 100 and the sleeve 200, when the annular sealing ring 220 is inserted into the annular mounting cavity 210, it is compressed by the drive ring 234 (compression direction as shown in the figure). Figure 1 (As shown in F1) The inner clamping member 233 rotates toward the outer clamping ring 232, so that the outer clamping ring 232 and the inner clamping member 233 work together to press the outer wall of the annular sealing ring 220 inward (the pressing direction is as shown in F1). Figure 1 As shown in F2), the inner wall is squeezed outward (the squeezing direction is as shown in F2). Figure 1 As shown in F3, to prevent axial deformation of the annular sealing ring 220 during installation, after releasing the compression on the outer and inner walls of the annular sealing ring 220, the annular sealing ring 220 is directly sleeved on the connecting pipe 100 and abuts against the inner wall of the sleeve 200, thus completing the seal between the sleeve 200 and the connecting pipe 100. Moreover, after installation, the auxiliary installation component 230 can be snapped onto the inner wall of the sleeve 200, playing a role in limiting and fixing, further improving the overall sealing stability of the rotary connector 400.

[0032] at the same time, Please see Figure 1 and Figure 2The drive ring 234 has a plug-in block 2341 on its side wall, which is slidably connected to the plug-in groove 2342 of the ring body 231; a retaining ring 2343 is disposed on the inner wall of the drive ring 234 and located below the inner clamping member 233; when the drive ring 234 is inserted into the plug-in groove 2342 by an external force, the annular sealing ring 220 is clamped by the outer clamping ring 232 and the inner clamping member 233, and the inner clamping member 233 is flipped outward by the retaining ring 2343, so as to squeeze the outer wall of the annular sealing ring 220 inward and the inner wall outward.

[0033] When the drive ring 234 is inserted into the insertion groove 2342 by external force, the inner clamping member 233 is flipped outward by the abutment ring 2343, so that the outer clamping ring 232 and the inner clamping member 233 can cooperate to squeeze the outer wall of the annular sealing ring 220 inward and the inner wall outward. This makes the clamping and squeezing process of the annular sealing ring 220 more stable and controllable, avoids local deformation of the sealing lip caused by uneven force on one side, and further improves the consistency and reliability of the sealing ring installation.

[0034] Please continue reading. Figure 1 and Figure 2 The outer wall of the ring body 231 is elastically connected to a plurality of snap-fit ​​blocks 2311 radially outward; a slot 250 is provided at the fitting point between the sleeve 200 and the snap-fit ​​block 2311; a pressing plate 2344 is provided at the fitting point between the drive ring 234 and the snap-fit ​​block 2311; when the drive ring 234 is inserted into the insertion slot 2342 by an external force, the pressing plate 2344 presses the snap-fit ​​block 2311 radially inward to compress it, so that the snap-fit ​​block 2311 disengages from the slot 250.

[0035] During the process of inserting the drive ring 234 into the insertion slot 2342, the extrusion plate 2344 will extrude the snap-fit ​​block 2311 to shrink radially and disengage from the snap-fit ​​slot 250, thereby ensuring that the auxiliary installation component 230 can be firmly fixed on the inner wall of the sleeve 200 after installation, playing a reliable limiting role and preventing the sealing ring from shifting during use.

[0036] Please see Figure 1 and Figure 2 The inner clamping member 233 includes: an arc-shaped clamping plate 2331, which is hinged to the ring body 231 via a rotating shaft 2332; a plurality of arc-shaped clamping plates 2331 are arranged circumferentially along the inner wall of the ring body 231.

[0037] The inner clamping member 233 can apply pressure evenly to the inner wall of the annular sealing ring 220 from multiple directions, avoiding excessive local deformation of the sealing ring caused by a single clamping point.

[0038] The contact surface between the outer clamping ring 232 and the annular sealing ring 220 is an open, inclined arc surface, which facilitates the insertion of the outer clamping ring 232 into the outer wall of the annular sealing ring 220. Simultaneously, the shape of the arc-shaped clamping plate 2331 matches the curvature of the inner wall of the annular sealing ring 220, increasing the contact area and improving the stability and uniformity of the clamping.

[0039] It should be noted that after the annular sealing ring 220 is installed into the annular mounting cavity 210, the outer clamping ring 232 is first pulled outward to disengage from the outer wall of the annular sealing ring 220. At this time, the inner clamping member 233 abuts against the inner wall of the annular sealing ring 220. Then, the driving ring 234 is pulled outward to disengage the inner clamping member 233 from the inner wall of the annular sealing ring 220. This reduces the axial deformation of the annular sealing ring 220 when the auxiliary mounting assembly 230 is pulled out of the annular sealing ring 220, thereby increasing the sealing performance between the annular sealing ring 220 and the connecting pipe 100 and the sleeve 200.

[0040] Please see Figure 1 The annular sealing ring 220 is C-shaped; there are three annular sealing rings 220; two annular sealing rings 220 are placed in the annular mounting cavity 210 after their openings are facing each other; then, the last annular sealing ring 220 is placed back to back with the middle annular sealing ring 220.

[0041] It should be noted that after the last annular sealing ring 220 is installed, the outer clamping ring of the auxiliary installation component 230 continuously squeezes the outer wall of the annular sealing ring 220, thereby increasing the sealing between the annular sealing ring 220 and the connecting pipe 100, thus enhancing the sealing performance of the last seal and further ensuring the sealing performance of the rotary connector 400.

[0042] The state in which the auxiliary installation component 230 clamps the front of the annular seal ring 220 is as follows: Figure 3 As shown, the auxiliary installation component 230 clamps the reverse side of the annular sealing ring 220 as follows: Figure 4 As shown, this allows for the clamping and installation of annular sealing rings 220 in different orientations.

[0043] Please see Figure 5 The ring body 231 and the drive ring 234 are respectively provided with a first insertion hole 2345 and a second insertion hole 2346 on the side away from the annular sealing ring 220, so as to allow the external push rod 300 to be inserted to push the ring body 231 and the drive ring 234 to move.

[0044] The first drive rod 310 and the second drive rod 320 of the external push rod 300 are respectively inserted into the first insertion hole 2345 and the second insertion hole 2346. When clamping the annular sealing ring 220, the first drive rod 310 and the second drive rod 320 are rotated so that the insertion rod 311 is opposite to the insertion hole 321, and the first drive rod 310 and the second drive rod 320 are fixed. The outer clamping ring 232 and the inner clamping member 233 clamp the annular sealing ring 220. Then, by pushing the first drive rod 310 and the second drive rod 320, the auxiliary installation assembly 230 installs the annular sealing ring 220 into the annular installation cavity 210.

[0045] Please see Figure 6 At least one embodiment also provides an upper loading arm assembly, the upper loading arm assembly including a plurality of rotary connectors 400 as described above.

[0046] Please see Figure 7 At least one embodiment also provides an installation method using the rotary connector 400 as described above. By providing an auxiliary installation component 230 within the annular mounting cavity 210 between the connecting pipe 100 and the sleeve 200, when the annular sealing ring 220 is inserted into the annular mounting cavity 210, the driving ring 234 presses the inner clamping member 233 towards the outer clamping ring 232, causing the outer clamping ring 232 and the inner clamping member 233 to work together to press the outer wall of the annular sealing ring 220 inward and the inner wall outward. The compression prevents axial deformation of the annular sealing ring 220 during installation. After the compression of the outer and inner walls of the annular sealing ring 220 is released, the annular sealing ring 220 is directly sleeved on the connecting pipe 100 and abuts against the inner wall of the sleeve 200, thus completing the seal between the sleeve 200 and the connecting pipe 100. Moreover, the auxiliary installation component 230 can be snapped onto the inner wall of the sleeve 200 after installation, playing a role in limiting and fixing, further improving the overall sealing stability of the rotary connector 400.

[0047] Specifically, the installation method includes: S110: Insert the connecting tube 100 into the sleeve 200.

[0048] S120: The annular sealing ring 220 is sequentially installed into the annular mounting cavity 210 using the auxiliary installation component 230.

[0049] S130: The inner clamping member 233 is pushed towards the outer clamping ring 232 by the drive ring 234, so that the outer wall of the annular sealing ring 220 is pushed inward and the inner wall is pushed outward by the outer clamping ring 232 and the inner clamping member 233.

[0050] Specifically, the first drive rod 310 and the second drive rod 320 of the external push rod 300 are respectively inserted into the first insertion hole 2345 and the second insertion hole 2346. When clamping the annular sealing ring 220, the first drive rod 310 and the second drive rod 320 are rotated so that the insertion rod 311 is opposite to the insertion hole 321, and the first drive rod 310 and the second drive rod 320 are fixed. The outer clamping ring 232 and the inner clamping member 233 clamp the annular sealing ring 220. Then, by pushing the first drive rod 310 and the second drive rod 320, the auxiliary installation assembly 230 installs the annular sealing ring 220 into the annular installation cavity 210.

[0051] S140: Insert the ring body 231 into the sleeve 200.

[0052] S150: Fit the bearing 240 onto the connecting pipe 100.

[0053] In summary, this invention provides an upper loading arm assembly, a rotary connector 400, and its installation method. By providing an auxiliary installation component 230 within the annular mounting cavity 210 between the connecting pipe 100 and the sleeve 200, when the annular sealing ring 220 is inserted into the annular mounting cavity 210, the driving ring 234 presses the inner clamping member 233 towards the outer clamping ring 232, causing the outer clamping ring 232 and the inner clamping member 233 to work together to press the outer wall of the annular sealing ring 220 inward and the inner wall outward. The compression prevents axial deformation of the annular sealing ring 220 during installation. After the compression of the outer and inner walls of the annular sealing ring 220 is released, the annular sealing ring 220 is directly sleeved on the connecting pipe 100 and abuts against the inner wall of the sleeve 200, thus completing the seal between the sleeve 200 and the connecting pipe 100. Moreover, the auxiliary installation component 230 can be snapped onto the inner wall of the sleeve 200 after installation, playing a role in limiting and fixing, further improving the overall sealing stability of the rotary connector 400.

[0054] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0055] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0056] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0057] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0058] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A rotary connector, characterized in that, include: Connecting pipe (100); A sleeve (200) is sleeved on the connecting pipe (100), and the sleeve (200) is rotatably connected to the connecting pipe (100); An annular mounting cavity (210) is provided between the inner wall of the sleeve (200) and the outer wall of the connecting pipe (100). The annular mounting cavity (210) is provided with a plurality of annular sealing rings (220), auxiliary mounting components (230) and bearings (240) in sequence, and the annular sealing rings (220), auxiliary mounting components (230) and bearings (240) are sleeved on the connecting pipe (100); The auxiliary installation component (230) is configured to insert a plurality of annular sealing rings (220) into the annular mounting cavity (210) in sequence, and then snap onto the inner wall of the sleeve (200) to limit the plurality of annular sealing rings (220); The auxiliary installation component (230) includes: The outer side wall of the ring body (231) extends axially toward the annular sealing ring (220) to form an outer clamping ring (232). The inner wall of the ring body (231) is hinged with a plurality of inner clamping members (233). A drive ring (234) is engaged with the ring body (231) on the side away from the annular seal (220); When the annular sealing ring (220) is installed into the annular mounting cavity (210), the inner clamping member (233) is squeezed by the drive ring (234) and rotated toward the outer clamping ring (232) so that the outer wall of the annular sealing ring (220) is squeezed inward and the inner wall is squeezed outward by the outer clamping ring (232) and the inner clamping member (233).

2. The rotary connector as described in claim 1, characterized in that, The drive ring (234) is provided with a plug block (2341) on its side wall, which is slidably connected to the plug groove (2342) of the ring body (231); A retaining ring (2343) is disposed on the inner wall of the drive ring (234) and located below the inner clamping member (233); When the drive ring (234) is inserted into the insertion groove (2342) by an external force, the annular sealing ring (220) is clamped by the outer clamping ring (232) and the inner clamping member (233), and the inner clamping member (233) is flipped outward by the abutment ring (2343) to squeeze the outer wall of the annular sealing ring (220) inward and the inner wall outward.

3. The rotary connector as described in claim 2, characterized in that, The outer wall of the ring body (231) is elastically connected to multiple snap-fit ​​blocks (2311) in a radial outward direction. A slot (250) is provided at the fitting point between the sleeve (200) and the snap-fit ​​block (2311); A pressing plate (2344) is provided at the mating point between the drive ring (234) and the snap-fit ​​block (2311). When the drive ring (234) is inserted into the insertion slot (2342) by an external force, the pressing plate (2344) presses the snap-fit ​​block (2311) to compress radially inward, so that the snap-fit ​​block (2311) disengages from the slot (250).

4. The rotary connector as described in claim 1, characterized in that, The inner clamping member (233) includes: An arc-shaped clamping plate (2331) is hinged to the ring body (231) via a pivot (2332); Multiple arc-shaped clamping plates (2331) are arranged circumferentially along the inner wall of the ring body (231).

5. The rotary connector as described in claim 1, characterized in that, The contact surface between the outer clamping ring (232) and the annular sealing ring (220) is an open, inclined arc surface, so that the outer clamping ring (232) can be inserted into the outer wall of the annular sealing ring (220).

6. The rotary connector as described in claim 1, characterized in that, After the annular sealing ring (220) is installed into the annular mounting cavity (210), the outer clamping ring (232) is first pulled outward to separate from the outer wall of the annular sealing ring (220). At this time, the inner clamping member (233) abuts against the inner wall of the annular sealing ring (220). Then the driving ring (234) is pulled outward to separate the inner clamping member (233) from the inner wall of the annular sealing ring (220).

7. The rotary connector as described in claim 1, characterized in that, The annular sealing ring (220) is C-shaped; The number of the annular sealing rings (220) is three; Among them, after the openings of the two annular sealing rings (220) are arranged opposite each other, they are first placed in the annular mounting cavity (210), and then the last annular sealing ring (220) and the middle annular sealing ring (220) are arranged back to back.

8. The rotary connector as described in claim 1, characterized in that, The ring body (231) and the drive ring (234) are respectively provided with a first insertion hole (2345) and a second insertion hole (2346) on the side away from the annular sealing ring (220) so that an external push rod (300) can be inserted to push the ring body (231) and the drive ring (234) to move.

9. A loading arm assembly, characterized in that, The upper loading arm assembly includes a plurality of rotary connectors (400) as described in any one of claims 1-8.

10. An installation method using a rotary connector as described in any one of claims 1-8, characterized in that, The installation method includes: Insert the connecting tube (100) into the sleeve (200); The annular sealing ring (220) is sequentially installed into the annular mounting cavity (210) using the auxiliary installation assembly (230); The inner clamping member (233) is squeezed by the drive ring (234) and rotated toward the outer clamping ring (232) so that the outer wall of the annular sealing ring (220) is squeezed inward and the inner wall is squeezed outward by the outer clamping ring (232) and the inner clamping member (233); Insert the ring body (231) into the sleeve (200); Place the bearing (240) onto the connecting pipe (100).

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