A rotating flange for ocean engineering

Abstract

An embodiment of the present application provides a rotating flange for ocean engineering, which relates to the technical field of connecting flanges for ocean engineering. The rotating flange for ocean engineering includes: a flange rotating part, a flange stationary part, and a mechanical seal part. The flange rotating part includes a front shell, a first flange plate, and a rear shell. The first flange plate is integrally formed at one end of the front shell, and the rear shell is fixedly arranged at the other end of the front shell. A second sealing ring is arranged between the first flange plate and the rear shell; the flange stationary part includes a pipe fitting and a second flange plate, and the second flange plate is fixed at one end of the pipe fitting. The first moving ring in the mechanical seal part is pre-contacted with the fluid inside the pipe fitting, that is, the first moving ring is more likely to be pre-corroded by the fluid during use, thereby reducing the sealing effect. Even if the sealing effect between the first moving ring and the first stationary ring weakens, the sealing between the second stationary ring and the second moving ring can become a second line of defense, so that the rotating flange still has a good sealing effect.

Description

Technical Field

[0001] This application relates to the technical field of offshore engineering connecting flanges, and more particularly, to a rotating flange for offshore engineering. Background Art

[0002] Offshore engineering is a new, renovated, or expanded project aimed at developing, utilizing, protecting, and restoring marine resources, and the main body of the project is located seaward of the coastline. In the development pipeline construction of offshore engineering, flanges are required to connect adjacent pipelines.

[0003] Since it is inconvenient to align the bolt mounting holes of the two groups of flanges at the pipe ends, a rotating flange is currently used to solve the problem that it is difficult to align the flange mounting holes between pipes. In the related art, a rotating flange that can rotate uses a mechanical seal to improve the sealing effect. However, when installing a simple single-layer mechanical seal rotating flange, the mechanical seal is offset during flange installation, and the gasket in the mechanical seal is corroded by the fluid for a long time, resulting in a reduction in sealing performance and affecting the normal transportation of submarine pipelines. Since the installation of submarine pipelines has high requirements for rotating flanges, this application provides a rotating flange for offshore engineering to solve the above problems. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application proposes a rotating flange for offshore engineering to solve the problems that the mechanical seal is offset during the installation of a single-layer mechanical seal rotating flange and the gasket in the mechanical seal is corroded by the fluid for a long time, resulting in a reduction in sealing performance and affecting the normal transportation of submarine pipelines.

[0005] A rotating flange for offshore engineering according to an embodiment of the present application includes: a flange rotating part, a flange stationary part, and a mechanical seal part.

[0006] The flange rotating part includes a front shell, a first flange plate, and a rear shell. The first flange plate is integrally formed at one end of the front shell, and the rear shell is fixedly arranged at the other end of the front shell. A second sealing ring is arranged between the first flange plate and the rear shell;

[0007] The flange stationary part includes a pipe fitting and a second flange plate. The second flange plate is fixed at one end of the pipe fitting, and the other end of the pipe fitting is inserted into the interiors of the front shell and the rear shell;

[0008] The mechanical seal part includes a seat frame, a spring, a first ring plate, a second ring plate, a first stationary ring, a second stationary ring, a first rotating ring and a second rotating ring. The seat frame is fixedly arranged outside the pipe fitting, and the seat frame is located inside the front shell. The first stationary ring and the second stationary ring are respectively arranged on both sides of the seat frame. Multiple groups of the springs are distributed in a circular array inside the seat frame. The first ring plate is arranged between the spring and the first stationary ring. The second ring plate is arranged between the spring and the second stationary ring. A seventh sealing ring is arranged between the outer wall of the seat frame on the outer side of the second stationary ring and the inner wall of the front shell. The first rotating ring is fixedly arranged inside the front shell near one end of the first flange, and the first rotating ring is in contact with the first stationary ring. The second rotating ring is fixedly arranged inside the second sealing ring near one end of the front shell, and the second rotating ring is in contact with the second stationary ring.

[0009] The working principle of the rotary flange for ocean engineering is as follows: The front shell and the rear shell are rotatably arranged with the pipe fitting through the mechanical seal part. The second flange at the end of the pipe fitting is butt-connected and communicated with the flange of the liquid inlet pipe. Since the first flange outside the front shell can be rotatably arranged, the through holes on the first flange and the through holes on the flange of the liquid outlet pipe can be accurately and quickly butt-connected, and it is more convenient to install bolts subsequently. The two ends of the spring in the mechanical seal part elastically support the first ring plate and the second ring plate respectively, that is, the elastic force of the spring can elastically support the first stationary ring and the second stationary ring. The first stationary ring under elastic support is in contact with the first rotating ring to achieve the first-stage sealing effect; the second stationary ring under elastic support is in contact with the second rotating ring to achieve the second-stage sealing effect. Compared with the traditional single mechanical seal structure, this rotary flange has a better sealing effect. The fluid in the pipe fitting flows from the second flange to the first flange. The first rotating ring in the mechanical seal part is pre-contact with the fluid inside the pipe fitting, that is, the first rotating ring is more likely to be pre-corroded by the fluid during use, thereby reducing the sealing effect. Even if the sealing effect between the first rotating ring and the first stationary ring weakens, the seal between the second stationary ring and the second rotating ring can become the second line of defense, so that the rotary flange still has a good sealing effect. When the sealing line between the first stationary ring and the first rotating ring is broken through by the fluid, the fluid presses the second ring plate towards the second stationary ring side with a strong pressure, that is, at this time, the second stationary ring and the second rotating ring are more closely attached, and a better sealing effect can be achieved between the second stationary ring and the second rotating ring at this time.

[0010] In some embodiments of the present application, an end shell is arranged on one side of the rear shell away from the front shell. A bearing is sleeved outside the pipe fitting, and the outer wall of the bearing is connected to the inner wall of the end shell.

[0011] In some embodiments of the present application, a second sealing ring gasket is arranged inside one end of the end shell away from the rear shell.

[0012] In some embodiments of the present application, the flange rotating part further includes fixing bolts, and the fixing bolts connect the first flange and the rear housing.

[0013] In some embodiments of the present application, fourth sealing rings are provided at both top edges of the two ends of the first moving ring, a third sealing ring is provided on the outer side of the second flange, and a first sealing ring is provided on the outer side of the first flange.

[0014] In some embodiments of the present application, a positioning ring plate is provided inside the front housing, and the positioning ring plate abuts against the fourth sealing ring between the first moving ring and the first moving ring at one end close to the first moving ring.

[0015] In some embodiments of the present application, the seat frame includes a support ring, a first limiting block and a second limiting block. A plurality of the first limiting blocks and the second limiting blocks are symmetrically distributed in a circular array on both sides of the support ring, and limiting grooves for slidingly cooperating with the first ring plate and the second ring plate are respectively provided on the inner walls of the first limiting block and the second limiting block.

[0016] In some embodiments of the present application, a limiting ring groove for cooperating with the seventh sealing ring is provided on the outer wall of the second limiting block.

[0017] In some embodiments of the present application, a plurality of mounting holes for mounting the spring are provided on the side of the support ring.

[0018] In some embodiments of the present application, fifth sealing rings are provided between the first stationary ring and the pipe fitting and between the second stationary ring and the pipe fitting, and a sixth sealing ring is provided between the second moving ring and the rear housing.

[0019] The mechanical seal in the above-mentioned rotating flange for ocean engineering adopts a double-sealing method, so that there is a better sealing effect between the flange rotating part and the flange stationary part. If the number of sealing layers can be increased again, the sealing effect of the rotating flange can be further improved.

[0020] In some embodiments of the present application, the flange rotating part further includes a first sealing ring gasket. The first sealing ring gasket is provided between the rear housing and the pipe fitting, and the first sealing ring gasket is located on the side of the second moving ring away from the second stationary ring. A ring cavity layer is provided inside the first sealing ring gasket, and a water inlet hole communicating with the ring cavity layer is provided on the side of the first sealing ring gasket close to the second moving ring. A pointed conical convex edge is provided on the inner circle of the first sealing ring gasket, and a groove for engaging with the pointed conical convex edge is provided on the outer wall of the pipe fitting.

[0021] The external gap between the front shell and the rear shell can be sealed by welding, which can ensure that the fluid that breaks through the seventh sealing ring or the second static ring cannot flow out from the gap between the front shell and the rear shell. At this time, the first sealing ring gasket between the rear shell and the pipe fitting can play the role of the third sealing. And after the first sealing line of defense between the first static ring and the first dynamic ring and the second sealing line between the second static ring and the second dynamic ring are broken, the fluid will enter the annular cavity layer through the water inlet hole on one side of the first sealing ring gasket. After the fluid with strong pressure enters the annular cavity layer, the inside of the annular cavity layer is filled, and the first sealing ring gasket bulges outward as a whole, so that the gap between the first sealing ring gasket and the rear shell and the pipe fitting is further squeezed, that is, the first sealing ring gasket between the rear shell and the pipe fitting will have a better sealing effect. The pointed cone convex edge at the bottom of the first sealing ring gasket can be stably stuck in the groove on the outside of the pipe fitting, which not only makes it difficult for the first sealing ring gasket to deviate when expanding between the rear shell and the pipe fitting, but also the contact surface of the V-shaped structure increases the contact area between the first sealing ring gasket and the pipe fitting, which can effectively help the first sealing ring gasket and the pipe fitting to have a better sealing effect.

[0022] In some embodiments of the present application, the pipe fitting includes a first straight pipe, a second straight pipe and a connecting hose, the two ends of the connecting hose are respectively connected to the opposite ends of the first straight pipe and the second straight pipe, the pipe fitting is fixedly sleeved on the outside of the first straight pipe, the groove is located on the outside of the second straight pipe, and the mechanical sealing part is arranged on the outside of the second straight pipe.

[0023] The rotating flange pipe fitting uses a connecting hose to connect the first straight pipe and the second straight pipe. The first straight pipe and the connecting hose, as well as the connecting hose and the second straight pipe, are both welded. The second flange and the first straight pipe are also fixed by welding. Since the first straight pipe and the second straight pipe are connected by a metal hose, when the second flange and the first flange are butt-jointed with the pipes at both ends during the replacement operation, the overall length of the rotating flange can be adjusted. With its own rotatable characteristics, the butt-jointing installation between the two sets of pipes is faster and more convenient.

[0024] The beneficial effects of the present application are as follows: the present application obtains a rotating flange for marine engineering through the above design, the fluid in the pipe flows from the second flange to the first flange, and the first dynamic ring in the mechanical seal part is in contact with the fluid inside the pipe in advance, that is, the first dynamic ring is more easily corroded by the fluid in advance during use, thereby reducing the sealing effect. Even if the sealing effect between the first dynamic ring and the first static ring is weakened, the seal between the second static ring and the second dynamic ring can also become the second line of defense, so that the rotating flange still has a good sealing effect. Compared with the traditional single-channel mechanical seal structure, the rotating flange has a better sealing effect.

[0025] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned by practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0027] Figure 1 is a schematic structural diagram of a rotating flange for ocean engineering according to an embodiment of the present application;

[0028] Figure 2 is a schematic structural diagram of the stationary part of the flange according to an embodiment of the present application;

[0029] Figure 3 is a schematic cross-sectional structural diagram of a rotating flange for ocean engineering according to an embodiment of the present application;

[0030] Figure 4 is a schematic partial cross-sectional structural diagram of a rotating flange for ocean engineering according to an embodiment of the present application;

[0031] Figure 5 is according to an embodiment of the present application Figure 4 partial enlarged structural diagram of part A;

[0032] Figure 6 is a schematic structural diagram of a seat frame according to an embodiment of the present application;

[0033] Figure 7 is a schematic cross-sectional structural diagram of a first sealing ring gasket according to an embodiment of the present application;

[0034] Figure 8 is according to an embodiment of the present application Figure 4 partial enlarged structural diagram of part B.

[0035] Reference numerals:

[0036] 10 - Flange rotating part; 110 - Front housing; 120 - First flange; 130 - Rear housing; 140 - Fixing bolt; 150 - End housing; 160 - First sealing ring gasket; 161 - Ring cavity layer; 162 - Water inlet hole; 163 - Tapered convex edge; 170 - Second sealing ring gasket; 180 - First sealing ring; 190 - Second sealing ring; 20 - Flange stationary part; 210 - Pipe fitting; 211 - First straight pipe; 212 - Second straight pipe; 213 - Connecting hose; 220 - Second flange; 230 - Groove; 240 - Bearing; 250 - Third sealing ring; 30 - Mechanical seal part; 301 - Fourth sealing ring; 302 - Fifth sealing ring; 303 - Sixth sealing ring; 310 - Seat frame; 311 - Support ring; 312 - First limit block; 313 - Second limit block; 314 - Limit ring groove; 315 - Mounting hole; 320 - Spring; 330 - First ring plate; 340 - Second ring plate; 350 - First stationary ring; 360 - Second stationary ring; 370 - First rotating ring; 380 - Second rotating ring; 390 - Seventh sealing ring; 410 - Positioning ring plate. Detailed implementation mode

[0037] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

[0038] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0040] A rotating flange for ocean engineering according to an embodiment of the present application will be described below with reference to the drawings.

[0041] Please refer to Figures 1-8 , a rotating flange for ocean engineering according to an embodiment of the present application, includes: a flange rotating part 10, a flange stationary part 20 and a mechanical seal part 30.

[0042] Among them, the mechanical seal part 30 can adopt a multi-sealing method between the rotating part 10 of the flange and the stationary part 20 of the flange to improve the sealing effect of the rotating flange.

[0043] Please refer to Figures 1-4 , the rotating part 10 of the flange includes a front shell 110, a first flange plate 120 and a rear shell 130. The first flange plate 120 is integrally formed at one end of the front shell 110, and the rear shell 130 is fixedly arranged at the other end of the front shell 110, and a second sealing ring 190 is arranged between the first flange plate 120 and the rear shell 130. The stationary part 20 of the flange includes a pipe fitting 210 and a second flange plate 220. The second flange plate 220 is fixed at one end of the pipe fitting 210, and the other end of the pipe fitting 210 is inserted into the interiors of the front shell 110 and the rear shell 130. The mechanical seal part 30 includes a seat frame 310, a spring 320, a first ring plate 330, a second ring plate 340, a first stationary ring 350, a second stationary ring 360, a first rotating ring 370 and a second rotating ring 380. The seat frame 310 is fixedly arranged outside the pipe fitting 210 by screws, and the seat frame 310 is located inside the front shell 110. The first stationary ring 350 and the second stationary ring 360 are respectively arranged on both sides of the seat frame 310. Multiple groups of springs 320 are distributed in a circular array inside the seat frame 310. The first ring plate 330 is arranged between the spring 320 and the first stationary ring 350, and the second ring plate 340 is arranged between the spring 320 and the second stationary ring 360. A seventh sealing ring 390 is arranged between the outer wall of the seat frame 310 on the outer side of the second stationary ring 360 and the inner wall of the front shell 110. The first rotating ring 370 is fixedly arranged inside the front shell 110 near one end of the first flange plate 120, and the first rotating ring 370 is in contact with the first stationary ring 350. The second rotating ring 380 is fixedly arranged inside the second sealing ring 190 near one end of the front shell 110, and the second rotating ring 380 is in contact with the second stationary ring 360.

[0044] The working principle of the rotating flange for offshore engineering is as follows: The front shell 110 and the rear shell 130 are rotatably arranged with the pipe fitting 210 by means of the mechanical seal part 30. The second flange plate 220 at the end of the pipe fitting 210 is butt-connected and communicated with the flange plate of the liquid inlet pipe. Since the first flange plate 120 outside the front shell 110 can be rotatably arranged, the through holes on the first flange plate 120 and the through holes on the flange plate of the liquid outlet pipe can be accurately and quickly butt-connected, and it is more convenient to install bolts subsequently. The two ends of the spring 320 in the mechanical seal part 30 elastically support the first ring plate 330 and the second ring plate 340 respectively, that is, the elastic force of the spring 320 can elastically support the first stationary ring 350 and the second stationary ring 360. The first stationary ring 350 under elastic support is in contact with the first rotating ring 370 to achieve the first-stage sealing effect; the second stationary ring 360 under elastic support is in contact with the second rotating ring 380 to achieve the second-stage sealing effect. Compared with the traditional single mechanical seal structure, this rotating flange has a better sealing effect.

[0045] The fluid in the pipe fitting 210 flows from the second flange 220 to the first flange 120. The first moving ring 370 in the mechanical seal part 30 is pre - contacted with the fluid inside the pipe fitting 210. That is, the first moving ring 370 is more likely to be pre - corroded by the fluid during use, thus reducing the sealing effect. Even if the sealing effect between the first moving ring 370 and the first static ring 350 weakens, the seal between the second static ring 360 and the second moving ring 380 can serve as a second line of defense, enabling the rotating flange to still have a good sealing effect.

[0046] When the sealing line between the first static ring 350 and the first moving ring 370 is breached by the fluid, the fluid presses the second ring plate 340 towards the second static ring 360 side with a strong pressure. That is, at this time, the second static ring 360 and the second moving ring 380 fit more closely, and the second static ring 360 and the second moving ring 380 will be able to achieve a better sealing effect at this time.

[0047] In the above - mentioned specific implementation manner, please refer to Figure 4 , on the side of the rear shell 130 away from the front shell 110, there is an end shell 150. A bearing 240 is sleeved outside the pipe fitting 210, and the outer wall of the bearing 240 is connected to the inner wall of the end shell 150. The setting of the end shell 150 and the bearing 240 enables the rotating part 10 of the flange and the static part 20 of the flange to rotate more smoothly.

[0048] Furthermore, a second sealing ring gasket 170 is arranged inside one end of the end shell 150 away from the rear shell 130. The setting of the second sealing ring gasket 170 can prevent external water sources from entering the bearing 240 and corroding the bearing 240.

[0049] Specifically, the rotating part 10 of the flange further includes fixing bolts 140. The fixing bolts 140 connect the first flange 120 and the rear shell 130. That is, the front shell 110 and the first flange 120 which are integrally formed are connected to the rear shell 130 by using the fixing bolts 140.

[0050] When specifically setting, please refer to Figure 4 and Figure 5 , at both top edges of the two ends of the first moving ring 370, there are fourth sealing rings 301. The setting of the fourth sealing rings 301 further seals the gap between the front shell 110 and the first moving ring 370. A third sealing ring 250 is arranged outside the second flange 220, and a first sealing ring 180 is arranged outside the first flange 120.

[0051] Further, a positioning ring plate 410 is arranged inside the front housing 110. One end of the positioning ring plate 410 close to the first moving ring 370 tightly abuts against the fourth sealing ring 301 between the limit and the first moving ring 370. The positioning ring plate 410 is used to extrude the fourth sealing ring 301 on one side and the first moving ring 370, so that the gap between the front housing 110 and the first moving ring 370 is further sealed.

[0052] In the above specific embodiments, please refer to Figure 4 and Figure 6 , the seat frame 310 includes a support ring 311, a first limit block 312 and a second limit block 313. Multiple first limit blocks 312 and second limit blocks 313 are symmetrically distributed in an annular array on both sides of the support ring 311. The first limit block 312 and the second limit block 313 are integrally formed with the support ring 311. And limit grooves for slidingly cooperating with the first ring plate 330 and the second ring plate 340 are respectively arranged on the inner walls of the first limit block 312 and the second limit block 313; the limit grooves are used to limit the first ring plate 330 and the second ring plate 340 sliding inside to slide more stably along the axial direction of the pipe fitting 210.

[0053] Specifically, a limit ring groove 314 for cooperating with the seventh sealing ring 390 is arranged on the outer wall of the second limit block 313, that is, the limit ring groove 314 is arranged for stably installing the seventh sealing ring 390. Multiple installation holes 315 for installing the spring 320 are formed in the side part of the support ring 311.

[0054] When specifically arranged, a fifth sealing ring 302 is arranged between the first stationary ring 350 and the pipe fitting 210 and between the second stationary ring 360 and the pipe fitting 210. The arrangement of the fifth sealing ring 302 is used to improve the sealing performance between the second stationary ring 360 and the pipe fitting 210. A sixth sealing ring 303 is arranged between the second moving ring 380 and the rear housing 130. The arrangement of the sixth sealing ring 303 is used to improve the sealing performance between the second moving ring 380 and the rear housing 130.

[0055] The mechanical seal in the above-mentioned rotating flange for offshore engineering adopts a double-sealing method, so that there is a better sealing effect between the rotating part 10 and the stationary part 20 of the flange. If the number of sealing layers can be increased again, the sealing effect of the rotating flange can be further improved.

[0056] In the above specific embodiments, please refer to Figure 4 , Figure 7 and Figure 8, the rotating part 10 of the flange further includes a first sealing gasket 160. The first sealing gasket 160 is arranged between the rear housing 130 and the pipe fitting 210, and the first sealing gasket 160 is located on the side of the second moving ring 380 away from the second static ring 360. A ring cavity layer 161 is arranged inside the first sealing gasket 160, and a water inlet hole 162 communicating with the ring cavity layer 161 is arranged on the side of the first sealing gasket 160 close to the second moving ring 380. A tapered convex edge 163 is arranged on the inner circle of the first sealing gasket 160, and a groove 230 engaged with the tapered convex edge 163 is arranged on the outer wall of the pipe fitting 210.

[0057] The external gap between the front housing 110 and the rear housing 130 can be sealed by welding, which can ensure that the fluid breaking through between the seventh sealing ring 390 or the second static ring 360 cannot flow out through the gap between the front housing 110 and the rear housing 130. At this time, the first sealing gasket 160 between the rear housing 130 and the pipe fitting 210 can play a triple sealing role. And after the first sealing line between the first static ring 350 and the first moving ring 370 and the second sealing line between the second static ring 360 and the second moving ring 380 are broken through, the fluid will enter the inside of the ring cavity layer 161 through the water inlet hole 162 on one side of the first sealing gasket 160. After the fluid with stronger pressure enters the inside of the ring cavity layer 161, the inside of the ring cavity layer 161 is filled, and the whole first sealing gasket 160 bulges outwards, so that the gap between the first sealing gasket 160 and the rear housing 130 and the pipe fitting 210 is further squeezed, that is, the first sealing gasket 160 between the rear housing 130 and the pipe fitting 210 will have a better sealing effect. The tapered convex edge 163 at the bottom of the first sealing gasket 160 can be stably stuck in the groove 230 outside the pipe fitting 210, which not only makes the first sealing gasket 160 not easy to shift when expanding between the rear housing 130 and the pipe fitting 210, but also the V-shaped contact surface increases the contact area between the first sealing gasket 160 and the pipe fitting 210, which can effectively help to have a better sealing effect between the first sealing gasket 160 and the pipe fitting 210.

[0058] The distance between the two flange plates of the commonly used rotating flange cannot be adjusted. During subsequent replacement operations, due to gravity, seawater extrusion, etc., after the old rotating flange is disassembled, the docking distance between the pipes may shift to a certain extent. Since the length of the commonly used rotating flange cannot be adjusted, the installation during the replacement operation is not fast enough.

[0059] For specific settings, please refer to Figure 3, the pipe fitting 210 includes a first straight pipe 211, a second straight pipe 212, and a connecting hose 213. Both ends of the connecting hose 213 are respectively connected to opposite ends of the first straight pipe 211 and the second straight pipe 212. The pipe fitting 210 is fixedly sleeved outside the first straight pipe 211. The groove 230 is located outside the second straight pipe 212, and the mechanical seal part 30 is arranged outside the second straight pipe 212.

[0060] In the pipe fitting 210 of this rotating flange, the connecting hose 213 is used to connect the first straight pipe 211 and the second straight pipe 212. Welding connections are used between the first straight pipe 211 and the connecting hose 213, and between the connecting hose 213 and the second straight pipe 212. The second flange 220 and the first straight pipe 211 are also fixed by welding. Since there is a metal hose connection between the first straight pipe 211 and the second straight pipe 212, when the second flange 220 and the first flange 120 dock the pipes at both ends during the replacement operation, the overall length of the rotating flange can be adjusted, and with its rotatable characteristic, the butt joint installation between the two groups of pipes is more rapid and convenient.

[0061] The above are only the embodiments of the present application and are not used to limit the protection scope of the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0062] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or replacements, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A rotating flange for marine engineering, characterized in that: include: A flange rotating part (10), the flange rotating part (10) comprising a front shell (110), a first flange plate (120) and a rear shell (130), the first flange plate (120) being integrally formed at one end of the front shell (110), the rear shell (130) being fixedly arranged at the other end of the front shell (110), and a second sealing ring (190) being arranged between the first flange plate (120) and the rear shell (130); A flange stationary part (20), the flange stationary part (20) comprising a pipe (210) and a second flange (220), the second flange (220) being fixed to one end of the pipe (210), and the other end of the pipe (210) being inserted into the front shell (110) and the rear shell (130); A mechanical seal portion (30), the mechanical seal portion (30) comprising a seat frame (310), a spring (320), a first ring plate (330), a second ring plate (340), a first static ring (350), a second static ring (360), a first dynamic ring (370) and a second dynamic ring (380), the seat frame (310) being fixedly arranged outside the pipe member (210), and the seat frame (310) being located inside the front shell (110), the first static ring (350) and the second static ring (360) being arranged on both sides of the seat frame (310), a plurality of groups of the springs (320) being distributed inside the seat frame (310) in a ring-shaped array, and the first ring plate (330) being arranged between the springs (320) and the first dynamic ring (370). a stationary ring (350), the second ring plate (340) being arranged between the spring (320) and the second stationary ring (360), a seventh sealing ring (390) being arranged between the outer wall of the seat frame (310) located outside the second stationary ring (360) and the inner wall of the front shell (110), the first moving ring (370) being fixedly arranged inside the front shell (110) near one end of the first flange (120), and the first moving ring (370) being arranged in contact with the first stationary ring (350), the second moving ring (380) being fixedly arranged inside the second sealing ring (190) near one end of the front shell (110), and the second moving ring (380) being arranged in contact with the second stationary ring (360); The flange rotating part (10) further comprises a first sealing ring gasket (160), the first sealing ring gasket (160) being arranged between the rear shell (130) and the pipe fitting (210), and the first sealing ring gasket (160) being located on a side of the second moving ring (380) away from the second stationary ring (360), an annular cavity layer (161) being arranged inside the first sealing ring gasket (160), and a water inlet hole (162) being arranged on a side of the first sealing ring gasket (160) close to the second moving ring (380) and being connected to the annular cavity layer (161), the first sealing ring gasket (160) being arranged on an inner ring with a pointed cone convex edge (163), and the outer wall of the pipe fitting (210) being arranged with a groove (230) engaging with the pointed cone convex edge (163).

2. The marine engineering rotary flange according to claim 1, characterized in that: An end shell (150) is provided on a side of the rear shell (130) away from the front shell (110), a bearing (240) is sleeved on the outside of the pipe (210), and an outer wall of the bearing (240) is connected to an inner wall of the end shell (150).

3. The marine engineering rotary flange according to claim 2, characterized in that: A second sealing ring gasket (170) is disposed inside one end of the end shell (150) away from the rear shell (130).

4. The marine engineering rotary flange according to claim 1, characterized in that: The flange rotating part (10) further comprises a fixing bolt (140), wherein the fixing bolt (140) connects the first flange plate (120) and the rear shell (130).

5. The marine engineering rotary flange according to claim 1, characterized in that: A fourth sealing ring (301) is provided at the top edges of both ends of the first moving ring (370), a third sealing ring (250) is provided on the outside of the second flange (220), and a first sealing ring (180) is provided on the outside of the first flange (120).

6. The marine engineering rotary flange according to claim 5, characterized in that: A positioning ring plate (410) is provided inside the front shell (110), and one end of the positioning ring plate (410) close to the first moving ring (370) is tightly pressed against the fourth sealing ring (301) between the limiter and the first moving ring (370).

7. The marine engineering rotary flange according to claim 1, characterized in that: The seat frame (310) comprises a support ring (311), a first limit block (312) and a second limit block (313); a plurality of the first limit blocks (312) and the second limit blocks (313) are symmetrically distributed on both sides of the support ring (311) in a ring array; and the inner wall of the first limit block (312) and the inner wall of the second limit block (313) are respectively provided with limit grooves that are slidably matched with the first ring plate (330) and the second ring plate (340).

8. The marine engineering rotary flange according to claim 7, characterized in that: The outer wall of the second limiting block (313) is provided with a limiting ring groove (314) that matches the seventh sealing ring (390).

9. The marine engineering rotary flange according to claim 7, characterized in that: The side of the support ring (311) is provided with a plurality of groups of mounting holes (315) for mounting the spring (320).

10. The marine engineering rotary flange according to claim 1, characterized in that: A fifth sealing ring (302) is provided between the first stationary ring (350) and the pipe fitting (210) and between the second stationary ring (360) and the pipe fitting (210), and a sixth sealing ring (303) is provided between the second dynamic ring (380) and the rear shell (130).

Images