CN217679340U

CN217679340U - Rotary joint suitable for hydraulic jet flushing pipeline of submarine trenching equipment

Info

Publication number: CN217679340U
Application number: CN202221606364.0U
Authority: CN
Inventors: 陈伟; 王君逸; 杨之悦; 王特征
Original assignee: Neptune Offshore Engineering Development Co ltd
Current assignee: Neptune Offshore Engineering Development Co ltd
Priority date: 2022-06-26
Filing date: 2022-06-26
Publication date: 2022-10-28
Anticipated expiration: 2032-06-26

Abstract

The utility model discloses a swivel joint suitable for submarine trenching equipment water conservancy spouts towards pipeline, including rotating member group, fixed member group, clamp plate flange, steel ball, through adopting the fixed member group of flange welded pipeline preparation inside nested installation rotating member group, both ends have the connection flange to realize the connection between fixed pipeline and rotating pipe, realize the swing adjustment of the water conservancy of spray arm spouts towards pipeline when the trenching equipment is under construction; a self-lubricating bearing and a sealing ring are arranged outside a rotary sealing ring of the rotary component group, so that the structural stability and the sealing performance during rotation are improved; steel balls are arranged on the vertical surfaces of the bearing platforms on the two sides of the boss of the rotary sealing ring, so that the contact resistance of the sleeve of the inner and outer ring sleeves during rotation is reduced, and a large-diameter bearing is not required; the steel balls are always attached to the rotating structure through extrusion of the pressing plate, so that the rotation stability is realized, and the service life is prolonged; but the maintenance of this patent rapid Assembly, use cost is low, can realize the economic manufacturing of more than 500mm single channel pipeline rotary joint.

Description

Rotary joint suitable for hydraulic jetting pipeline of seabed trenching equipment

Technical Field

The utility model relates to an ocean engineering technology field, particularly, in particular to rotary joint suitable for submarine trenching equipment water conservancy spouts towards pipeline.

Background

With the increasing demand of resources, offshore oil and gas become a new development hotspot, and oil and gas fields in deep sea provide energy sources for land through pipelines. In the deep sea, the pipeline burying operation is greatly influenced by seawater environmental factors, the ditching construction of a rear pipeline is generally carried out by adopting a mode of combining hydraulic jetting and large-flow jetting, the angle of a jetting pipe is timely adjusted according to different soil hardness in different areas, the ditching depth is basically consistent, a jetting pipe which can be adjusted and can be remotely controlled is needed, and the pipeline can be rotated. However, the jetting flow of the trenching equipment is extremely large, the specification of a hydraulic jetting pipeline generally exceeds 500mm, if the existing rotary joint in the form of forging processing and bearing installation is adopted, the size of the whole joint is extremely large, the weight is also extremely large, the installation of construction is not suitable, the underwater equipment is heavy in weight, and the operation is difficult.

SUMMERY OF THE UTILITY MODEL

In order to compensate for the deficiencies of the prior art, the utility model provides a rotary joint suitable for submarine trenching equipment water conservancy spouts towards pipeline.

The utility model discloses a realize through following technical scheme:

a rotary joint suitable for a hydraulic jet flushing pipeline of a submarine trenching device comprises a rotary member group, a fixed member group, a pressure plate flange and steel balls,

the rotary component group consists of a rotary end part connecting flange, a connecting pipe short section and a rotary sealing ring, wherein one end of the connecting pipe short section is connected with the rotary end part connecting flange in a welding way, the other end of the connecting pipe short section is inserted into a bearing platform of a convex ring end inner hole of the rotary sealing ring and is connected with the bearing platform in a welding way, and the steel balls are embedded and installed on the vertical surfaces of the bearing platforms at the two sides of the convex ring end inner hole of the rotary sealing ring through a processed arc-shaped annular groove;

the fixed component group consists of a fixed end part connecting flange, a shell and a middle connecting flange, wherein the fixed end part connecting flange and the middle connecting flange are respectively sleeved and welded at two end parts of the shell in a ring way;

the clamp plate flange ring cover in the connecting pipe nipple joint is close to in the outside of rotating the sealing ring one end, clamp plate flange's facade processing has the satisfaction steel ball card is gone into and with rotating the annular that sealing ring's arc annular matches, clamp plate flange pass through connecting bolt with intermediate junction flange presses close to taut.

Preferably, two groups of self-lubricating bearings are respectively installed on the outer side of the rotary sealing ring through processing two groups of annular grooves, and each self-lubricating bearing is a wear-resistant belt which is made of a fiber-containing polytetrafluoroethylene material and has a rectangular cross section; two groups of sealing rings are respectively arranged between the two groups of self-lubricating bearings through processing two groups of annular grooves, and the sealing rings are O-shaped sealing rings made of fluororubber or nitrile butadiene rubber materials.

Preferably, the rotary end connecting flange is a flange ring formed by forging or cutting a steel plate, and the vertical surface of the rotary end connecting flange can be connected with the output pipeline in a plane sealing mode or a sealing ring sealing mode.

Preferably, the fixed end connecting flange is a flange ring formed by forging or cutting a steel plate, and the vertical surface of the fixed end connecting flange can be connected with the output pipeline in a plane sealing mode or a sealing ring sealing mode.

The utility model discloses owing to adopted above technical scheme, compare with prior art and make it have following beneficial effect:

1. the rotary component group is embedded and installed in the fixed component group made of the flange welded pipeline, and connecting flanges are arranged at two ends of the rotary component group to realize the connection between the fixed pipeline and the rotary pipeline, so that the swing adjustment of the hydraulic jet flushing pipeline of the jet arm during the construction of the trenching equipment is realized;

2. the two sets of self-lubricating bearings and the two rings of sealing rings are arranged outside the rotary sealing ring, the sealing rings are arranged in the rotary sealing ring, and the two outer sides of the rotary sealing ring are respectively provided with one set of self-lubricating bearing, so that the effect of a bearing bush is realized, the structure is relatively stable during rotation, eccentric wear does not occur during circumferential rotation of the sealing rings, the sealing durability and the sealing effect are ensured, meanwhile, the self-lubricating bearings and the sealing rings are convenient to replace, and quick assembly and maintenance can be realized;

3. the steel balls are arranged on the vertical surfaces of the bearing platforms on the two sides of the boss of the rotary sealing ring, so that the contact resistance of the sleeve of the inner ring sleeve and the sleeve of the outer ring sleeve during rotation is reduced, a large-diameter bearing is not needed, and meanwhile, the steel balls are always attached to a rotating structure through extrusion of the pressing plate, so that the rotation stability is realized, and the service life is prolonged.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 is a schematic diagram of the preferred embodiment of the present invention;

FIG. 3 is a schematic view of a rotary seal ring according to a preferred embodiment of the present invention;

fig. 4 is a schematic structural diagram of an outer shell of the preferred embodiment of the present invention.

Wherein, the corresponding relation between the reference numbers and the parts in fig. 1-4 is as follows:

1. a rotating member set; 11. the rotating end part is connected with a flange; 12. connecting a pipe nipple; 13. rotating the sealing ring; 2. a fixed member group; 21. the fixed end part is connected with a flange; 22. a housing; 23. a middle connecting flange; 3. a connecting bolt; 4. pressing plate flanges; 5. a self-lubricating bearing; 6. a seal ring; 7. and (5) steel balls.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A rotary joint suitable for a hydraulic jet flushing pipeline of a subsea trenching apparatus according to embodiments of the present invention will be described in detail with reference to fig. 1-4.

As shown in fig. 1-4, a swivel for a hydrojet pipe of a subsea trenching apparatus, comprising: the device comprises a rotating component group 1, a fixed component group 2, a pressure plate flange 4 and steel balls 7;

the rotary component set 1 is a sleeve-shaped steel component with a connecting flange at one end and a bulge ring in the middle, the rotary component set 1 is composed of a rotary end connecting flange 11, a connecting pipe short section 12 and a rotary sealing ring 13, the rotary end connecting flange 11 is a flange ring which is forged or cut by a steel plate, the rotary end connecting flange 11 is sleeved on the end of the connecting pipe short section 12 in a sleeving manner and is connected with the connecting pipe short section in a welding manner, and the vertical surface of the rotary end connecting flange 11 is connected with an output pipeline in a plane sealing manner or a sealing ring sealing manner; the connecting pipe nipple 12 is a nipple manufactured by cutting a standard steel pipe, the outer part of one end is sleeved with a welding rotating end part connecting flange 11, and the other end is inserted into the inner hole of the rotating sealing ring 13 to be in socket welding connection, so that the connection strength and the sealing connection transition are met; the rotary sealing ring 13 is a forged cylinder structure with a raised ring at one end, a socket platform is processed in an inner hole at the end of the raised ring to meet the requirement that a connecting pipe nipple 12 is inserted and welded, arc-shaped annular grooves are processed in bearing platform vertical surfaces at two sides of the raised ring, steel balls 7 are nested in the arc-shaped annular grooves to realize rolling friction of the rotary component set 1 around the fixed component set 2, the steel balls 7 are stainless steel balls and are uniformly nested in two circles of arc-shaped annular grooves processed in the bearing platform vertical surfaces at two sides of the raised platform of the rotary sealing ring 13 to realize free rotation of the rotary component set 1 around the fixed component set 2, the steel balls 7 are fully distributed in the grooves, the contact reduction during rotation is realized by mounting the steel balls and is changed into rolling friction, the diameter and the number of distributed circles of the selected steel balls 7 are different according to different bearing pressures, the number of circles is more when the pressure is higher, and the diameter of the balls is larger; a groove for installing two rings of self-lubricating bearings 5 and two rings of sealing rings 6 is processed outside the rotary sealing ring 13, the specific width and depth are according to the installation requirements of the self-lubricating bearings 5 and the sealing rings 6, the sealing rings 6 are close to the inner part, and two outer sides are respectively provided with a set of self-lubricating bearings 5; the rotary sealing ring 13 is inserted into the shell 22 to enable two self-lubricating bearings 5 to support, so that the effect of a bearing bush is achieved, relative stability in rotation is kept, eccentric wear cannot occur when two sets of sealing rings 6 installed in the rotary sealing ring 6 rotate circumferentially, the self-lubricating bearings 5 are wear-resistant belts made of fiber-containing polytetrafluoroethylene materials, the ring sleeves are installed in grooves outside the rotary sealing ring 13, the thickness is generally 2-2.5 mm, the width is 20mm, the two rings are arranged along the axis to form stable axis stable supports, the stability of sealing structures of the two rings of sealing rings 6 between the two rings is improved, when the rotary sealing ring 13 is inserted into the shell 22 to enable the self-lubricating bearings 5 to be embedded in and sleeved with the circumferential contact surface areas, due to the corrosion resistance of high polymer materials and the abrasion resistance of reinforcing fibers, the effect of the bearing bush is achieved, friction between the outside of the rotary sealing ring 13 and the inside of the shell 22 is avoided, the sealing rings 6 are O-shaped sealing rings made of rubber, the ring is installed in the grooves outside the rotary sealing ring 13, the two rings are arranged adjacently, the sealing ring is arranged, the sealing reliability is improved, the sealing ring is inserted into the shell 22 to form extrusion through the rotary sealing ring, good sealing is achieved, the pipeline, and the pipeline is made of the rubber sealing ring 6, and the main sealing ring made of the seawater rubber or the butyl rubber.

The fixed component group 2 is a structure with flanges at two ends and a steel cylinder in the middle, fixed end connecting flanges 21 and middle connecting flanges 23 at two ends are respectively welded with a shell 22, the fixed end connecting flanges 21 are flange rings formed by forging or steel plate cutting, the fixed end connecting flanges are sleeved at the end parts of the shell 22 and are welded with the end parts, the vertical surfaces of the fixed end connecting flanges and the middle connecting flanges are connected with an output pipeline in a plane sealing or sealing ring sealing mode, the shell 22 is a ring rolled by a steel plate, the total length meets the installation length requirements of an internal self-lubricating bearing 5 and a sealing ring 6, the fixed end connecting flanges and the sealing ring are shorter as far as possible in principle, two ends of the fixed end connecting flanges are respectively welded in a nesting mode, the inner wall is processed to have higher finish degree, and the rotation requirements of the self-lubricating bearing 5 and the sealing ring 6 are met, the end, close to the fixed end part connecting flange 21, is processed with an internal taper to realize the diameter expansion of a pipeline, is consistent with the internal diameter of the pipeline at the connecting end, the other end is processed with an internal bearing platform, meanwhile, the vertical surface of the bearing platform is processed with an arc-shaped annular groove to meet the clamping and installation of the steel balls 7, the middle connecting flange 23 is a flat flange ring processed by cutting a steel plate, the annular ring is sleeved at the end part of the shell 22 and is welded with the end part of the shell, the connecting bolt 3 is closely tightened with the pressure plate flange 4 to clamp the rotating sealing ring 13 of the rotating component set 1, the steel balls 7 arranged at two sides realize that the rotating component set 1 freely rotates around the fixed component set 2, the quantity and the specification of the processed connecting bolt holes are all according to the standards according to different selected flange pressure levels of water pressure in the pipeline.

Connecting bolt 3 is the subassembly of outer hexagonal bolt and nut of standard, and specific specification is confirmed according to the flange joint aperture, selects stainless steel in principle, satisfies short-term use under water and places with the surface of water for a period of time, and the length of bolt is confirmed according to installation space, whether adopts locknut or adopts remaining locking mode and can correspond the adjustment according to design or special requirement.

The pressure plate flange 4 is a flat plate flange ring cut and processed by a steel plate, the pressure plate flange is sleeved outside the connecting pipe short section 12, a ring groove is also processed at the arc-shaped ring groove position of the rotary sealing ring 13 corresponding to the vertical surface, the clamping and installation of the steel balls 7 are met, the rotary sealing ring 13 of the rotary component set 1 is clamped by the connection bolt 3 and the middle connecting flange 23 in a close-up and tensioning manner, and the free rotation of the rotary component set 1 around the fixed component set 2 is realized through the steel balls 7 installed at two sides.

The application principle of the patent is as follows:

selecting matched flanges according to the specification of a fixed output pipeline flange, performing structural design on a fixed component group 2, selecting a self-lubricating bearing 5 and a sealing ring 6 according to pressure requirements, then performing structural design on a rotary component group 1, determining the specification models and the number of a connecting bolt 3, a pressure plate flange 4 and a steel ball 7 according to pressure and rotating speed, and finishing manufacturing of a rotary end connecting flange 11, a connecting pipe short section 12, a rotary sealing ring 13, a fixed end connecting flange 21, a shell 22, an intermediate connecting flange 23 and a pressure plate flange 4 according to a design drawing;

assembling and welding a fixed end connecting flange 21, a shell 22 and a middle connecting flange 23 to form a sleeve-shaped fixed component group 2, welding and connecting a rotating end connecting flange 11 and a connecting pipe short section 12, sleeving a pressure plate flange 4 in the direction, keeping an arc-shaped ring groove of a steel ball 7 away from one side of the rotating end connecting flange 11, and then inserting the connecting pipe short section 12 into a bell-and-spigot hole of a rotating sealing ring 13 to be welded and connected into a whole;

cleaning the structural parts, installing a self-lubricating bearing 5 and a sealing ring 6 in an annular groove position of a rotating component group 1 with a pressure plate flange 4, smearing lubricating grease on arc-shaped annular grooves on two sides of the vertical surface of a rotating sealing ring 13, plugging steel balls 7 into the arc-shaped annular grooves to be distributed as densely as possible, plugging the integral rotating component group 1 with the steel balls 7 into a cylinder of a fixed component group 2, adjusting a connecting hole of the pressure plate flange 4 to be aligned with a middle connecting flange 23, and installing a connecting bolt 3. Tightening the connecting bolts 3 arranged on the circumference of the flange in sequence to achieve the required torque, and finishing the assembly;

the assembled rotary joint assembly is transported to a general assembly site of the trenching equipment, the fixed end connecting flange 21 is connected with a water pump outlet pipeline, the required bolt assembly and sealing element are installed, the rotary end connecting flange 11 and the hydraulic jet flushing pipeline are connected in the same mode, the installation of the rotary joint on the subsea trenching equipment is completed, during construction, the hydraulic jet flushing pipeline and the rotary component set 1 are adjusted by stretching and retracting the oil cylinder on the hydraulic jet flushing pipeline to rotate around the fixed component set 2, the angle adjustment of the hydraulic jet flushing pipeline is realized, the burial depth requirements of pipelines with different depths are met, and by the mode, under the condition that the pipeline structure is not changed, the swinging of the jet flushing pipeline is adjustable, the high-flow jet flushing water with pressure is conveyed, and the construction requirements are met.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary joint suitable for a hydraulic jet flushing pipeline of a submarine trenching device is characterized by comprising a rotary component group (1), a fixed component group (2), a pressure plate flange (4) and steel balls (7),

the rotary component group (1) comprises a rotary end connecting flange (11), a connecting pipe short section (12) and a rotary sealing ring (13), wherein one end of the connecting pipe short section (12) is connected with the rotary end connecting flange (11) in a welding manner, the other end of the connecting pipe short section (12) is inserted into a bearing platform of a convex ring end inner hole of the rotary sealing ring (13) and is connected with the bearing platform in a welding manner, and the steel balls (7) are installed on bearing platform vertical surfaces on two sides of the convex ring end inner hole of the rotary sealing ring (13) through nesting in a processed arc-shaped annular groove;

the fixed component group (2) comprises a fixed end connecting flange (21), a shell (22) and a middle connecting flange (23), the fixed end connecting flange (21) and the middle connecting flange (23) are respectively sleeved in a ring and welded at two ends of the shell (22), one end of the shell (22) close to the fixed end connecting flange (21) is processed to form an inner taper, one end of the shell (22) close to the middle connecting flange (23) is processed to form an inner bearing platform with an arc-shaped ring groove for clamping the steel balls (7), and the rotary sealing ring (13) is inserted into the shell (22);

clamp plate flange (4) ring cover in connecting pipe nipple joint (12) be close to in the outside of rotating seal ring (13) one end, the facade processing of clamp plate flange (4) has the satisfaction steel ball (7) card is gone into and with the annular that the arc annular of rotating seal ring (13) matches, clamp plate flange (4) through connecting bolt (3) with intermediate junction flange (23) are pressed close to taut.

2. A swivel suitable for use in a hydrojet pipeline of a subsea trenching apparatus as claimed in claim 1 wherein: two groups of self-lubricating bearings (5) are respectively installed on the outer side of the rotary sealing ring (13) through processing two groups of annular grooves, and each self-lubricating bearing (5) is a wear-resistant belt which is made of fiber-containing polytetrafluoroethylene materials and has a rectangular cross section; two groups of sealing rings (6) are respectively installed between the two groups of self-lubricating bearings (5) through processing two groups of annular grooves, and the sealing rings (6) are O-shaped sealing rings made of fluororubber or nitrile butadiene rubber materials.

3. A swivel suitable for use in a hydrojet pipeline of a subsea trenching apparatus as claimed in claim 1 wherein: the rotary end connecting flange (11) is a flange ring formed by forging or steel plate cutting, and the vertical surface of the rotary end connecting flange (11) can be connected with an output pipeline in a plane sealing mode or a sealing ring sealing mode.

4. A swivel for a hydrojet pipe for a subsea trenching apparatus as defined in claim 1, wherein: the fixed end connecting flange (21) is a flange ring formed by forging or steel plate cutting, and the vertical surface of the fixed end connecting flange (21) can be connected with an output pipeline in a plane sealing mode or a sealing ring sealing mode.