A rotary compensator for corrosion-resistant pipelines based on titanium-zirconium steel clad plate

Abstract

The application discloses a kind of based on titanium zirconium steel composite plate's corrosion-resistant pipeline rotary compensator, it is related to pipeline rotary compensator technical field, including rotary compensation mechanism, for the compensation of pipeline system, stress generated by the deformation of pipeline is offset by rotating action;Rotary compensation mechanism includes: inner cylinder and rotation sleeve is set in the outer cylinder of inner cylinder one end, outer cylinder inner wall is welded with ring body one.The application is through composite anticorrosion cylinder body+multiple elastic pressure stabilizing seal, adapts to strong corrosion high pressure working condition, long-acting zero leakage, cylinder body adopts titanium zirconium steel composite structure, inner layer zirconium layer resists various acid alkali, organic solvent corrosion, outer layer titanium steel guarantees pipeline pressure strength, compared with pure zirconium component, manufacturing cost is greatly reduced, uses front and rear double packing partition sealing and is matched with multiple fluorine rubber sealing ring, cooperate spring elasticity and continue to compensate pressure structure, packing wear is automatically pressed and eliminates gap, internal inert gas pressure stabilizing system forms reverse barrier pressure, high-pressure corrosive medium is difficult to penetrate sealing interface.

Description

Technical Field

[0001] This invention relates to the field of pipeline rotary compensators, and in particular to a corrosion-resistant pipeline rotary compensator based on a titanium-zirconium steel composite plate. Background Technology

[0002] A rotary compensator is a compensation device used in pipeline systems. It is mainly used to absorb the deformation of pipelines caused by thermal expansion and contraction, displacement and other factors, thereby reducing pipeline stress and protecting the safe operation of the pipeline system. It is commonly used in chemical and metallurgical industries for pipelines transporting highly corrosive media such as acids, alkalis and organic solvents. The core technology of the rotary compensator lies in its sealing technology.

[0003] However, in practical applications, there are still some unresolved problems. The following are some common problems of rotary compensators for corrosion-resistant pipelines: The seal is only a single layer of packing. Due to the friction between the inner cylinder and the sealing packing when the inner cylinder rotates, the sealing packing wears down. The packing in the rotary compensator will gradually decrease during use until it loses its sealing function, resulting in a decline in sealing performance. Loose packing can easily lead to media leakage. There is a lack of elastic pressure-repairing seal and inert gas pressure stabilization structure. After the packing wears down, it cannot automatically compensate for the gap. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing rotary compensators for corrosion-resistant pipelines based on titanium-zirconium steel composite plates, the present invention is proposed.

[0006] Therefore, the problem to be solved by this invention is how to solve the problem that the gap cannot be automatically compensated after the packing wears in a single-layer packing sealing structure.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a rotary compensator for corrosion-resistant pipelines based on titanium-zirconium steel composite plates, comprising: a rotary compensation mechanism for compensating pipeline systems, which offsets the stress generated by pipeline deformation through rotational movement; the rotary compensation mechanism comprising: an inner cylinder and an outer cylinder rotatably sleeved at one end of the inner cylinder; a first ring welded to the inner wall of the outer cylinder, a second ring welded to the outer surface of the inner cylinder; ball bearings arranged in a circumferential array between the first and second rings; and a third ring fixed to one end surface of the inner cylinder; a sealing mechanism installed on the outer cylinder and... The inner cylinder is used to seal the gap between the outer cylinder and the inner cylinder; the sealing mechanism includes: packing material one and packing material two for sealing the gap between the outer cylinder and the inner cylinder, packing material one and packing material two being located between the outer cylinder and the inner cylinder; the sealing mechanism also includes: a sealing element, disposed between the outer cylinder and the inner cylinder, and located between packing material one and packing material two, separating packing material one and packing material two, for pressing packing material one and packing material two; a sealing element, disposed between the outer cylinder and the inner cylinder, with the sealing element fixed on the sealing element, for defining the installation position of packing material one and packing material two between the outer cylinder and the inner cylinder.

[0008] As a preferred embodiment of the corrosion-resistant rotary compensator for pipelines based on titanium-zirconium steel composite plates described in this invention, the sealing element includes: a stop plate, which is movably sleeved on the outer surface of the inner cylinder and slides on the inner surface of the outer cylinder; a first sealing ring, which is embedded and fixed in the inner ring of the stop plate and contacts the outer surface of the inner cylinder; a second sealing ring, which is embedded and fixed in the outer ring of the stop plate and contacts the inner surface of the outer cylinder; and a through groove, which is formed on the stop plate and communicates with the first sealing ring and the second sealing ring respectively.

[0009] As a preferred embodiment of the corrosion-resistant rotary compensator for pipelines based on titanium-zirconium steel composite plates described in this invention, the sealing element comprises: a retaining shell, movably sleeved on the outer surface of the inner cylinder and sliding on the inner surface of the outer cylinder; a piston, sliding on the inner wall of the retaining shell; an arc plate, arranged in a circumferential array and sliding on the retaining shell, with both ends of the arc plate fixed between the piston surface and the retaining plate surface respectively; a spring, arranged in a circumferential array and fixed between the inner wall of the retaining shell and the piston surface; a sealing ring three, embedded and fixed on the outer ring of the retaining shell and in contact with the inner surface of the outer cylinder; a sealing ring four, embedded and fixed on the inner ring of the retaining shell and in contact with the outer surface of the inner cylinder; and several sealing sleeves, each sleeved on the surface of multiple arc plates and embedded on the retaining shell.

[0010] As a preferred embodiment of the corrosion-resistant rotary compensator for pipelines based on titanium-zirconium steel composite plates described in this invention, the sealing member further includes: a channel one, which is formed on the piston and the arc plate and communicates with the through groove and the inner cavity of the abutment shell; a channel two, which is formed inside the abutment shell and communicates with sealing ring three, sealing ring four and the inner cavity of the abutment shell; and a slot, which is formed inside the abutment shell and communicates with channel two and the sealing sleeve.

[0011] As a preferred embodiment of the corrosion-resistant rotary compensator for pipelines based on titanium-zirconium steel composite plates described in this invention, wherein: a flange is fixed to one end surface of the outer cylinder, and the sealing mechanism further includes: a fixing element installed on the flange and the abutment; the fixing element includes: a connecting plate movably sleeved on the surface of the inner cylinder and fixed to the surface of the abutment; screws distributed in a circumferential array, with their two ends penetrating the flange and the connecting plate respectively; and several nuts, each threaded onto both ends of the screws and abutting against the flange and the connecting plate.

[0012] As a preferred embodiment of the corrosion-resistant rotary compensator for pipelines based on titanium-zirconium steel composite plates described in this invention, the outer cylinder is equipped with a lubrication mechanism for adding lubricating fluid to the ball bearings; the lubrication mechanism includes: a lubricating component disposed on the outer cylinder; an opening and closing component disposed on the outer cylinder and cooperating with the lubricating component; and a lubricating fluid tank fixedly sleeved on the outer surface of the outer cylinder and cooperating with the opening and closing component.

[0013] As a preferred embodiment of the corrosion-resistant rotary compensator for pipelines based on titanium-zirconium steel composite plates described in this invention, the lubricating components include: a flow channel one, arranged in a circumferential array within the outer cylinder; a flow channel two, arranged in a circumferential array within the outer cylinder; a rubber ring, embedded and fixed to the inner surface of the outer cylinder, located between ring body two and ring body three, and connected to flow channel one and flow channel two respectively; a spring three, arranged in a circumferential array and fixed to the inner surface of the rubber ring; a one-way valve one, disposed within flow channel one; a one-way valve two, disposed within flow channel two; and a compression block arranged in a circumferential array fixed to one end surface of the inner cylinder.

[0014] As a preferred embodiment of the corrosion-resistant rotary compensator for pipelines based on titanium-zirconium steel composite plates described in this invention, the opening and closing components include: a valve column, one end of which slides within a flow channel; a valve hole, located at one end of the valve column; through holes, arranged in a circumferential array on the surface of the valve column and communicating with the valve hole; a trigger column, which slides on the outer cylinder and is fixed to the other end of the valve column; and a spring four, which is sleeved on the surface of one end of the valve column and has its two ends fixed between the surface of the trigger column and the surface of the outer cylinder, respectively. A connecting hole is provided on the outer cylinder and the lubricating fluid tank, and the connecting hole cooperates with the flow channel and the through hole.

[0015] As a preferred embodiment of the corrosion-resistant rotary compensator for pipelines based on titanium-zirconium steel composite plate described in this invention, the outer cylinder and the inner cylinder both include a zirconium layer and a titanium layer, with the zirconium layer fixed to the inner surface of the titanium layer.

[0016] As a preferred embodiment of the corrosion-resistant pipeline rotary compensator based on titanium-zirconium steel composite plate described in this invention, wherein: a limit ring is fixed on the inner surface of the outer cylinder and cooperates with the ring body in three phases, and a feeding component is installed on the outer cylinder.

[0017] The beneficial effects of this invention are as follows: 1. The composite anti-corrosion cylinder body + multiple elastic pressure stabilizing seals are suitable for strong corrosion and high pressure working conditions, with long-term zero leakage. The cylinder body adopts a titanium-zirconium steel composite structure. The inner zirconium layer is resistant to corrosion by various acids, alkalis and organic solvents, while the outer titanium steel layer ensures the pressure bearing strength of the pipeline. Compared with pure zirconium components, the manufacturing cost is greatly reduced. The front and rear double packing partition seals are combined with multiple fluororubber sealing rings and a spring elastic continuous pressure replenishment structure. After the packing wears, it automatically tightens to eliminate gaps. The internal inert gas pressure stabilizing system forms a reverse barrier pressure, making it difficult for high-pressure corrosive media to penetrate the sealing interface. The structure eliminates the risk of leakage and can be used for long-term use in high-temperature and high-pressure transmission pipelines for chemical corrosive media.

[0018] 2. The ball bearing rolling pair + rotary follow-up lubrication system provides flexible compensation and significantly extends equipment life. The ball bearing rotating pair replaces the traditional sliding structure, resulting in low rotational resistance and smooth, unobstructed compensation for pipeline thermal deformation. The mechanical oil pump mechanism is formed by the rotation and extrusion of the inner cylinder, eliminating the need for an external oil pump. During pipeline operation, grease is automatically added to the ball bearing friction pair at fixed points, completely solving the problem of dry friction and wear. The oil circuit is equipped with pipeline linkage opening and closing components, which automatically shut down during disassembly, assembly, and maintenance, avoiding waste of lubricating medium and reducing labor and material costs for later maintenance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 Three-dimensional structure of a corrosion-resistant rotary compensator for pipelines based on titanium-zirconium steel composite plate. Figure 1 .

[0021] Figure 2 Three-dimensional structure of a corrosion-resistant rotary compensator for pipelines based on titanium-zirconium steel composite plate. Figure 2 .

[0022] Figure 3 This is a partial structural sectional plan view of a rotary compensator for corrosion-resistant pipelines based on titanium-zirconium steel composite plates.

[0023] Figure 4 Rotary compensators for corrosion-resistant pipelines based on titanium-zirconium steel composite plates Figure 3 Enlarged view of point A in the middle.

[0024] Figure 5 Rotary compensators for corrosion-resistant pipelines based on titanium-zirconium steel composite plates Figure 3 Enlarged view of section B in the middle.

[0025] Figure 6Rotary compensators for corrosion-resistant pipelines based on titanium-zirconium steel composite plates Figure 3 Enlarged view of point C in the middle.

[0026] Figure 7 Rotary compensators for corrosion-resistant pipelines based on titanium-zirconium steel composite plates Figure 3 Enlarged view of point D in the middle.

[0027] Figure 8 Rotary compensators for corrosion-resistant pipelines based on titanium-zirconium steel composite plates Figure 3 Enlarged view of point E in the middle.

[0028] Figure 9 Rotary compensators for corrosion-resistant pipelines based on titanium-zirconium steel composite plates Figure 3 Cross-sectional perspective view at point aa.

[0029] Figure 10 Rotary compensators for corrosion-resistant pipelines based on titanium-zirconium steel composite plates Figure 3 Sectional perspective view at point bb.

[0030] Figure 11 Rotary compensators for corrosion-resistant pipelines based on titanium-zirconium steel composite plates Figure 3 3D sectional view at the cc point.

[0031] Figure 12 This is a partial three-dimensional view of a rotary compensator for corrosion-resistant pipelines based on titanium-zirconium steel composite plates.

[0032] Figure 13 This is a three-dimensional cross-sectional view of the zirconium and titanium layers of a corrosion-resistant rotary compensator for pipelines based on a titanium-zirconium steel composite plate.

[0033] In the diagram: 1. Rotary compensation mechanism; 11. Inner cylinder; 12. Outer cylinder; 13. Ring body one; 14. Ring body two; 15. Ball bearing; 16. Ring body three; 17. Limiting ring; 2. Sealing mechanism; 21. Packing material one; 22. Packing material two; 23. Sealing element; 24. Sealing element; 25. Fixing element; 26. Feeding element; 3. Lubrication mechanism; 31. Lubricating element; 32. Opening and closing element; 33. Lubricating fluid tank; 41. Zirconium layer; 42. Titanium layer; 111. Extrusion block; 121. Flange; 231. Abutment plate; 232. Sealing ring one; 233. Sealing ring two; 234. Through groove; 241. Abutment shell; 242. Piston; 243. Arc plate; 2 44. Spring 1; 245. Sealing Ring 3; 246. Sealing Ring 4; 247. Sealing Sleeve; 248. Channel 1; 249. Channel 2; 2410. Slot; 251. Connecting Plate; 252. Screw; 253. Nut; 261. Feeding Shell; 262. Baffle; 263. Ring Plate; 264. Round Rod; 265. Spring 2; 266. Pull Plate; 311. Flow Channel 1; 312. Flow Channel 2; 313. Rubber Ring; 314. Spring 3; 315. One-Way Valve 1; 316. One-Way Valve 2; 321. Valve Column; 322. Valve Hole; 323. Through Hole; 324. Trigger Column; 325. Spring 4; 331. Connecting Hole. Detailed Implementation

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0037] Example 1, referring to Figures 1-3 This is the first embodiment of the present invention. This embodiment provides a rotary compensator for corrosion-resistant pipelines based on titanium-zirconium steel composite plates. The rotary compensator for corrosion-resistant pipelines based on titanium-zirconium steel composite plates includes a rotary compensation mechanism 1 and a sealing mechanism 2.

[0038] Specifically, the rotary compensation mechanism 1 is used for compensation of the pipeline system; it absorbs the axial and angular displacement of the pipeline caused by thermal expansion and contraction, and offsets the stress generated by pipeline deformation through rotation, thus preventing the pipeline from cracking and being damaged due to long-term stress. The rotary compensation mechanism 1 includes: an inner cylinder 11 and an outer cylinder 12 rotatably sleeved at one end of the inner cylinder 11. An annular body 13 is welded to the inner wall of the outer cylinder 12. The rotary compensation mechanism 1 adopts a nested rotary structure of the inner cylinder 11 and the outer cylinder 12, relying on the relative rotation of the inner and outer cylinders to absorb the axial displacement caused by thermal expansion and contraction of the pipeline. The displacement and angular deflection of the inner cylinder 11 are offset to compensate for the thermal deformation stress of the pipeline and prevent cracking of pipeline joints, flange cracking and weld leakage. The outer surface of the inner cylinder 11 is welded with a second ring 14. A circular array of balls 15 is arranged between the first ring 13 and the second ring 14. A third ring 16 is fixed on one end surface of the inner cylinder 11. The circular array of balls 15 between the first ring 13 and the second ring 14 forms a rolling rotating pair, which changes the traditional sliding friction to rolling friction, greatly reducing rotational damping, wear and jamming risks, and ensuring flexible and smooth compensation rotation.

[0039] Specifically, the sealing mechanism 2 is installed between the outer cylinder 12 and the inner cylinder 11 to seal the gap between them, preventing the corrosive medium being transported from leaking through the gap. The sealing mechanism 2 includes packing material 1 21 and packing material 22 for sealing the gap between the outer cylinder 12 and the inner cylinder 11. The packing material 1 21 and packing material 22 are located between the outer cylinder 12 and the inner cylinder 11. The sealing mechanism 2 is a full-level sealing protection system, which adopts a front and rear double packing partition filling sealing structure. Unlike the traditional single packing seal, it has more sealing levels and stronger pressure resistance and corrosion resistance. Both packing material 1 21 and packing material 22 are made of graphite packing or other sealing packing, which are existing technologies and can be clearly understood by those skilled in the art, so they will not be described in detail here.

[0040] The sealing mechanism 2 also includes: a sealing element 23, which is disposed between the outer cylinder 12 and the inner cylinder 11, and located between the first packing 21 and the second packing 22, and separates the first packing 21 and the second packing 22, and is used to compress the first packing 21 and the second packing 22. The sealing element 23 is disposed between the two sets of packing, and plays the role of isolating and partitioning, axially compressing, and uniformly transmitting pressure, so as to avoid mixing, collapse, and displacement of the front and rear packing, and ensure that the compaction degree of the packing at both ends is consistent.

[0041] The sealing element 24 is disposed between the outer cylinder 12 and the inner cylinder 11, and the sealing element 23 is fixed on the sealing element 24. It is used to limit the installation position of packing 1 21 and packing 22 between the outer cylinder 12 and the inner cylinder 11, prevent packing 1 21 and packing 22 from moving within the gap and affecting the sealing effect, and at the same time provide installation support for the sealing element 23. The sealing element 24 serves as a sealing base and limiting support structure, fixing the installation position of the sealing element 23, limiting the filling area and shape of packing 1 21 and packing 22 within the annular gap, preventing the packing from moving axially or circumferentially under medium pressure, pipeline vibration, and rotational friction, and eliminating leakage due to seal failure.

[0042] Packing material 22 fills the space formed between the sealing element 24, the sealing element 23, the outer cylinder 12, and the inner cylinder 11. Packing material 21 fills the space formed between the ring body 13, the sealing element 23, the outer cylinder 12, and the inner cylinder 11. Packing material 21 fills the cavity enclosed by the ring body 13, the sealing element 23, and the inner and outer cylinders. Packing material 22 fills the cavity enclosed by the sealing element 24, the sealing element 23, and the inner and outer cylinders. The two cavities are independently sealed, forming two corrosion-resistant media sealing barriers.

[0043] Example 2, refer to Figures 3 to 12 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0044] Specifically, the sealing element 23 is an annular isolation and pressing disc structure, which is a key transition component for the stability of the double packing seal. The sealing element 23 includes: a stop plate 231, which is movably sleeved on the outer surface of the inner cylinder 11 and slides on the inner surface of the outer cylinder 12; packing 1 21 and packing 22 are located on opposite sides of the stop plate 231; the stop plate 231 is an annular disc base, which realizes bidirectional end face pressing and positioning, so that the packing on both sides is pressurized evenly and densely sealed; sealing ring 1 232, which is embedded and fixed in the inner ring of the stop plate 231 and contacts the outer surface of the inner cylinder 11; sealing ring 233, which is embedded and fixed in the outer ring of the stop plate 231 and contacts the inner surface of the outer cylinder 12; and a through groove 234, which is opened on the stop plate 231 and is connected to sealing ring 1 232 and sealing ring 233 respectively.

[0045] Sealing ring 1 232 achieves dynamic sealing of the inner ring, and sealing ring 233 achieves dynamic sealing of the outer ring, forming a double-ring radial seal. The through groove 234 provides a through path for subsequent inert gas pressure stabilization and sealing self-compensation channel. Sealing ring 1 232 and sealing ring 233 are made of corrosion-resistant fluororubber and perfluororubber, which are suitable for strong corrosive media and high-temperature conditions.

[0046] When the pipeline is rotated for compensation, the abutment plate 231 floats adaptively with the gap between the inner and outer cylinders, and the inner and outer ring sealing rings continuously adhere to the cylinder wall, preventing the medium from penetrating the packing gap. The abutment plate 231 axially presses the packing on both sides to prevent the packing from loosening and falling off. The through groove 234 serves as a pressure balance channel, which can balance the sealing pressure of the inner and outer rings, improve the dynamic seal stability, and prevent high-pressure medium from breaking through the sealing gap.

[0047] Specifically, the sealing element 24 is an adaptive elastic compression sealing structure with floating compensation, automatic pressure replenishment and multi-seal protection capabilities. The sealing element 24 includes: a retaining shell 241, which is movably sleeved on the outer surface of the inner cylinder 11 and slides on the inner surface of the outer cylinder 12. The retaining shell 241 is an integral annular sealing base; a piston 242, which slides on the inner wall of the retaining shell 241, and a sealing treatment is performed between the piston 242 and the retaining shell 241; and several arc plates 243, which slide on the retaining shell 241 in a circumferential array. The two ends of the arc plates 243 are respectively fixed between the surface of the piston 242 and the surface of the retaining plate 231. The arc plates 243 can transmit pressure synchronously and achieve axial flexible compression. The filler 22 is located in the space formed by the retaining shell 241, the arc plates 243, the retaining plate 231, the outer cylinder 12 and the inner cylinder 11.

[0048] Spring 244, in several units, is fixed in a circumferential array between the inner wall of the abutment 241 and the surface of the piston 242. Spring 244 provides a continuous elastic pushing force, which continuously compresses the packing through the arc plate 243 and the abutment plate 231, compensating for the gaps caused by long-term wear and loosening of the packing. Sealing ring 245 is embedded and fixed in the outer ring of the abutment 241 and contacts the inner surface of the outer cylinder 12. Sealing ring 245 is a static and dynamic composite seal on the outer ring. Sealing ring 246 is embedded and fixed in the abutment 241. 1. The inner ring is in contact with the outer surface of the inner cylinder 11. The sealing ring 246 is a static and dynamic composite seal of the inner ring, which doubles the isolation between external water vapor, dust and internal corrosive media; there are several sealing sleeves 247, which are respectively fitted on the surface of multiple arc plates 243 and embedded in the shell 241. The sealing sleeves 247 ensure the sealing of the arc plate 243 at the extension and contraction position, prevent the pressure chamber from leaking and the medium from seeping into the interior of the mechanism. The sealing sleeves 247 fit tightly with the arc plate 243, and there is no pressure leakage or leakage during extension and contraction.

[0049] During installation, the abutment shell 241 pushes the packing 22, the packing 1 21, and the abutment plate 231 between the packing 1 21 and the packing 22, thus compacting the packing 1 21 and the packing 22. At the same time, the spring 1 244 continuously pushes the piston 242 to move, and the circumferential arc plate 243 evenly presses the abutment plate 231, so that the packing 1 21 and the packing 22 are kept in a compacted state for a long time. When the packing 1 21 wears and the compression rebound decreases, the elastic structure automatically compensates for the gap by replenishing the pressure, so as to avoid the seal loosening and leakage. Multiple sealing rings and sealing sleeve 247 form multiple barriers.

[0050] Specifically, the sealing element 24 also includes: a channel 248, which is opened on the piston 242 and the arc plate 243 and is connected to the through groove 234 and the inner cavity of the abutment shell 241, and the channel 248 realizes the overall air passage; a channel 249, which is opened in the abutment shell 241 and is connected to the sealing ring 245, the sealing ring 246 and the inner cavity of the abutment shell 241, and the channel 249 provides pressure stabilization support for the radial sealing surface; and a slot 2410, which is opened in the abutment shell 241 and is connected to the channel 249 and the sealing sleeve 247, and the slot 2410 provides air pressure compensation for the expansion and contraction sealing points of the arc plate 243.

[0051] The space formed by sealing ring 232, sealing ring 233, sealing ring 245, sealing ring 246, sealing sleeve 247, through groove 234, channel 1 248, channel 2 249, slot 2410, and the space formed by the shell 241 and the piston 242 is filled with inert gas. The inert gas can be nitrogen, argon, etc., to form an internal slightly positive pressure environment, so that each sealing lip and packing gap is continuously supported by gas pressure, preventing the negative pressure from drawing in the medium and the high pressure from leaking out. The entire gas circuit is completely sealed with no leakage points, ensuring long-term pressure stabilization.

[0052] It also includes an air supply device disposed on the connecting plate 251 and the abutment 241, which is not shown in the figure. This structure is prior art and can be clearly understood by those skilled in the art, so it will not be described in detail here.

[0053] The entire sealed gas circuit is fully connected, and the internal inert gas forms a uniform micro-positive pressure field. When the high-pressure medium in the pipeline wants to leak out, the internal gas pressure reverses and blocks the medium from penetrating. When the seal wears and a small gap appears, the gas pressure automatically fills the gap and maintains the sealed fit. When the packing 21 is severely worn, the seal will fail. When the high-pressure gas or fluid in the pipeline seeps into the packing 21, it will put pressure on the abutment plate 231, which will then push the abutment plate 231, the arc plate 243 and the piston 242 back. The abutment plate 231 puts pressure on the packing 22 to improve the sealing performance. At the same time, the piston 242 moves in the abutment shell 241, which will increase the internal gas pressure, thereby improving and maintaining the sealed fit between the sealing ring and the sealing sleeve 247.

[0054] Specifically, a flange 121 is fixed to one end of the outer cylinder 12. The sealing mechanism 2 also includes: a fixing member 25, which is installed on the flange 121 and the abutment 241; the fixing member 25 includes: a connecting plate 251, which is movably sleeved on the surface of the inner cylinder 11 and fixed to the surface of the abutment 241; a number of screws 252, which are arranged in a circumferential array, with their two ends penetrating the flange 121 and the connecting plate 251 respectively, and mounting holes for mounting the screws 252 are opened on the flange 121 and the connecting plate 251; and a number of nuts 253, which are threaded onto both ends of the screws 252 and abut against the flange 121 and the connecting plate 251.

[0055] The fastener 25 achieves overall axial positioning and pre-tightening limit of the sealing mechanism 2, preventing the sealing mechanism from axially shifting and coming off, and forms an axial locking and pre-tightening structure between the flange 121 and the shell 241. The connecting plate 251 does not interfere with the relative rotation of the inner and outer cylinders, but only provides axial pressing limit. The screws 252 and nuts 253 are evenly tightened around the circumference, ensuring that the shell 241 is subjected to uniform circumferential force and that the sealing structure is pressed evenly without eccentric load.

[0056] By uniformly locking the flange 121 and the connecting plate 251 with the circumferential array bolt group, the entire limiting sealing mechanism 2 is indirectly pressed and tightened, limiting the maximum axial displacement of the abutment shell 241 and the abutment plate 231, ensuring that the sealing structure will not be axially displaced due to medium pressure or pipeline thrust, while retaining the rotational compensation degree of freedom of the inner and outer cylinders, achieving a stable working condition of "axial locking and circumferential rotation".

[0057] Example 3, referring to Figures 1 to 13 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0058] Specifically, a lubrication mechanism 3 is installed on the outer cylinder 12 to add lubricant to the balls 15, reduce wear between the balls 15 and the first ring 13 and the second ring 14, extend the service life of the rotation compensation mechanism 1, and ensure smooth rotation. The lubrication mechanism 3 solves the problems of easy dry wear, corrosion, jamming, and short life of traditional compensator balls. The lubrication mechanism 3 includes a lubricating element 31, which is set on the outer cylinder 12 and is used to deliver lubricant to the balls 15 between the first ring 13 and the second ring 14. The lubricating element 31 is responsible for delivering the lubricating medium to the friction pair position of the balls 15. Automatic oil supply is achieved according to the compensation rotation action, and fixed-point lubrication is achieved.

[0059] The opening and closing element 32 is installed on the outer cylinder 12 and cooperates with the lubricating element 31; it is used to control the opening and closing of the lubricating fluid delivery channel. The opening and closing element 32 is a mechanical automatic on / off control valve. During the process of completing the connection between the rotary compensator and the pipeline, it triggers the automatic opening of the oil supply passage. After the rotary compensator and the pipeline are inspected and disassembled, the oil supply passage is automatically closed. The lubricating fluid tank 33 is fixedly sleeved on the outer surface of the outer cylinder 12 and cooperates with the opening and closing element 32; it is used to store the lubricating fluid to be replenished. The lubricating fluid tank 33 can store anti-corrosion grease and high and low temperature resistant lubricating fluid for a long time, so as to achieve infrequent maintenance. The lubricating fluid is a special lubricating grease that is corrosion resistant, high and low temperature resistant, and insoluble in the pipeline medium.

[0060] After the rotary compensator is connected to the pipeline, the opening and closing component 32 is triggered to automatically open the oil supply passage. When the pipeline undergoes thermal deformation and the compensator rotates, the lubricating component 31 automatically supplies oil. The lubricating fluid in the lubricating fluid tank 33 is delivered to the gap between the ball 15 and the first ring 13 and the second ring 14 through the lubricating component 31 for real-time lubrication and friction reduction. After the rotation stops, the oil supply stops.

[0061] Specifically, the lubricating component 31 includes: a number of flow channels 311 arranged in a circumferential array inside the outer cylinder 12, which serve as oil supply channels; a number of flow channels 312 arranged in a circumferential array inside the outer cylinder 12, which serve as oil distribution channels; and a rubber ring 313 embedded and fixed on the inner surface of the outer cylinder 12, located between ring body 14 and ring body 16, and connected to flow channels 311 and 312 respectively. The rubber ring 313 has integrally formed protrusions arranged in a circumferential array, and the rubber ring 313 has elastic deformation capability, which serves to seal and pump oil between ring body 14 and ring body 16.

[0062] Several springs 314 are fixed to the inner surface of the rubber ring 313 in a circumferential array. Springs 314 enhance the rebound and reset ability of the rubber ring 313, ensuring stable deformation recovery. One-way valve 315 is set in the flow channel 311. One-way valve 316 is set in the flow channel 312. One end surface of the inner cylinder 11 is fixed with a circumferential array of extrusion blocks 111, which cooperate with the protrusions. The cross-section of the extrusion blocks 111 is semi-circular, which makes it easier to extrude the rubber ring 313. When the inner and outer cylinders rotate relative to each other, the extrusion blocks 111 periodically extrude the protrusions on the rubber ring 313, realizing the effect of cavity extrusion pumping oil. One-way valve 315 and one-way valve 316 control the unidirectional flow of lubricating fluid, prevent oil return, backflow and pressure relief.

[0063] When the compensator rotates, the inner cylinder 11 drives the extrusion block 111 to rotate, periodically extruding the protrusions on the rubber ring 313, causing the volume of the inner cavity of the rubber ring 313 to change periodically, generating pump suction pressure. Under the flow control action of the one-way valve, the lubricating fluid is unidirectionally pressed from the lubricating fluid tank 33 into the flow channel and sprayed to the corresponding lubrication point. When the rotation stops, the oil supply stops, realizing adaptive lubrication that completely follows the compensation action.

[0064] Specifically, the opening and closing component 32 includes: a valve stem 321, one end of which slides within the flow channel 311. The valve stem 321 and the flow channel 311 are sealed. It can slide axially to open and close the channel. After sliding to its final position, the through hole 323 aligns with the connecting hole 331, enabling oil passage connection; a valve hole 322, located at one end of the valve stem 321; several through holes 323 arranged in a circumferential array on the surface of the valve stem 321, communicating with the valve holes 322; and a trigger post 324, which slides... The outer cylinder 12 is fixed to the other end of the valve stem 321; the spring 325 is sleeved on one end surface of the valve stem 321, and both ends are fixed between the surface of the trigger post 324 and the surface of the outer cylinder 12 respectively. The spring 325 is the reset elastic element of the valve stem 321. Under normal conditions, it keeps the oil circuit closed. One end of the trigger post 324 is exposed on the outer cylinder 12. The outer cylinder 12 and the lubricating oil tank 33 are provided with a connecting hole 331, and the connecting hole 331 is matched with the flow channel 311 and the through hole 323.

[0065] When the rotary compensator is connected to the pipeline, the trigger column 324 moves under the pressure of the pipeline installation, causing the valve column 321 to slide and compress the spring 325, so that the through hole 323 on the valve column 321 is aligned with the connecting hole 331, and the oil circuit is opened. When the rotary compensator is separated from the pipeline, the spring 325 rebounds and resets, the valve column 321 is misaligned and blocks the flow channel, the oil circuit is closed, and the oil supply is stopped, avoiding the leakage and waste of lubricating oil caused by failure to close during disassembly and maintenance.

[0066] Specifically, both the outer cylinder 12 and the inner cylinder 11 include a zirconium layer 41 and a titanium layer 42. The zirconium layer 41 is fixed to the inner surface of the titanium layer 42. Both the inner and outer cylinders adopt a zirconium-titanium steel composite plate structure. The titanium layer 42 serves as the base layer to bear strength, ensuring the overall structural strength, pressure bearing capacity, rigidity, and weldability of the pipeline. The zirconium layer 41 serves as a cladding layer for corrosion resistance. The zirconium layer 41 is located at the contact surface of the pipeline medium and directly contacts strong corrosive media such as acids, alkalis, salt spray, and organic solvents. It has extremely strong corrosion resistance, oxidation resistance, and erosion resistance. Since titanium is cheaper than zirconium, it can save a lot of costs. At the same time, since titanium and zirconium are elements in the same group, the two metals are mutually soluble, which solves the problem of welding the two metals together.

[0067] Specifically, a limiting ring 17 is fixed on the inner surface of the outer cylinder 12 and cooperates with the ring body 16. The limiting ring 17 limits the axial displacement of the inner and outer cylinders, preventing the structure from falling out and the ball bearings 15 from falling off. A feeding component 26 is installed on the outer cylinder 12. The feeding component 26 is used to facilitate the normal filling of the filling material 22 in the space formed by the sealing component 24, the sealing component 23, the outer cylinder 12 and the inner cylinder 11. The feeding component 26 includes: a feeding shell 261, which is several in number and arranged in a circumferential array connected to the outer cylinder 12; and baffles 262, which are several in number and arranged in a circumferential array. A circular array slides on the feeding shell 261; an annular plate 263 is fixedly sleeved on the surface of the outer cylinder 12; a round rod 264 slides on the annular plate 263, and one end of the round rod 264 is fixed on the baffle 262, and the other end of the round rod 264 is fixed with a pull plate 266. A spring 265 is sleeved on the surface of one end of the round rod 264, and the two ends of the spring 265 are respectively fixed between the surface of the baffle 262 and the surface of the annular plate 263. The baffle 262 and the feeding shell 261 are sealed. The pull plate 266 is a manually operated structure, and the spring 265 realizes automatic reset and sealing.

[0068] Initially, when the space between the sealing element 24, the sealing element 23, the outer cylinder 12, and the inner cylinder 11 needs to be filled with uncompacted filler 22, the pull plate 266 is manually pulled to move the round rod 264 and the baffle 262 to open the feeding shell 261 channel, and filler 22 is filled into the space. Then, the sealing element 24 and the sealing element 23 are operated by the fixing element 25 to achieve compaction and sealing of filler 1 21 and filler 22.

[0069] It should be noted that the structure and materials used in this device meet the requirements for use in high-temperature and high-pressure pipelines operating under corrosive media: the cylinder is made of titanium steel / zirconium steel composite plate, which is resistant to acid and alkali corrosion, organic solvent corrosion, and erosion; the sealing packing, sealing ring, and rubber elastic parts are made of corrosion-resistant and temperature-resistant polymer materials; the balls, rings, and sliding fit parts are made of high-strength wear-resistant and corrosion-resistant alloys; the internal inert gas pressure stabilizing sealing system, adaptive elastic pressure compensation structure, and mechanical follow-up lubrication system work together to give this rotary compensator excellent performance in terms of long-term maintenance-free operation, zero leakage, flexible compensation, anti-aging, and anti-corrosion, fully meeting the standards for thermal compensation in chemical corrosion pipelines.

[0070] During use, thermal displacement rotation compensation: when the pipeline undergoes axial and angular deformation due to heat, the inner cylinder 11 and the outer cylinder 12 rely on the circumferential rolling balls 15 to rotate relative to each other, absorbing the thermal stress of the pipeline in the form of rolling friction, thus avoiding the cracking of welds and flanges due to tension; the rolling balls 15 change sliding friction to rolling, greatly reducing rotational resistance. The cylinder body adopts a composite structure of titanium base layer + zirconium anti-corrosion inner layer. The zirconium layer 41 is in direct contact with the corrosive medium, resisting acid and alkali erosion corrosion, while the titanium layer 42 can ensure the structural pressure bearing strength, balancing cost and anti-corrosion performance.

[0071] Double-packing elastic self-compensating seal: The sealing element 23 divides the sealing area into two independent packing sealing cavities. The spring 244 inside the sealing element 24 continuously pushes the arc plate 243 and the abutment plate 231 to press the packing. When the packing wears and loosens over a long period of time, the elastic structure automatically fills the gap. Each sealing ring and channel is filled with inert micro-positive pressure gas. The reverse pressure of the gas prevents corrosive media from penetrating into the tiny gaps. The multi-layer sealing rings form multiple barriers to prevent leakage. The fixing element 25 on the flange 121 axially locks the entire sealing assembly to prevent the sealing structure from shifting due to the thrust of the medium.

[0072] Follow-up mechanical automatic lubrication: After the pipeline is assembled in place, the trigger column 324 is pressurized to open the lubrication oil circuit. When the pipeline is running and the inner cylinder 11 is rotating, the circumferential extrusion block 111 periodically extrudes the rubber ring 313. The alternating change of the inner cavity volume generates pump suction oil pressure. The lubricating fluid is unidirectionally transported to the friction pair of the ball 15 along the flow channel. Oil is supplied when rotating and stopped when stopping. The one-way valve prevents grease backflow. When the pipeline is disassembled for maintenance, the spring 325 drives the valve column 321 to close the oil circuit to prevent lubricating fluid leakage.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A rotary compensator for corrosion-resistant pipelines based on titanium-zirconium steel composite plates, characterized in that: include, Rotary compensation mechanism (1) is used for compensation of pipeline systems, and offsets the stress generated by pipeline deformation through rotational action; The rotational compensation mechanism (1) includes: an inner cylinder (11) and an outer cylinder (12) rotatably sleeved on one end of the inner cylinder (11). A ring body one (13) is welded to the inner wall of the outer cylinder (12), and a ring body two (14) is welded to the outer surface of the inner cylinder (11). A ball bearing (15) arranged in a circular array is provided between the ring body one (13) and the ring body two (14). A ring body three (16) is fixed to one end surface of the inner cylinder (11). Sealing mechanism (2) is installed between outer cylinder (12) and inner cylinder (11) for sealing the gap between outer cylinder and inner cylinder; sealing mechanism (2) includes: packing material one (21) and packing material two (22) for sealing the gap between outer cylinder (12) and inner cylinder (11), packing material one (21) and packing material two (22) are located between outer cylinder (12) and inner cylinder (11); The sealing mechanism (2) further includes: a sealing member (23), which is disposed between the outer cylinder (12) and the inner cylinder (11) and is located between the first packing (21) and the second packing (22), and separates the first packing (21) and the second packing (22) for pressing the first packing (21) and the second packing (22); a sealing member (24), which is disposed between the outer cylinder (12) and the inner cylinder (11), and the sealing member (23) is fixed on the sealing member (24) for limiting the installation position of the first packing (21) and the second packing (22) between the outer cylinder (12) and the inner cylinder (11); The sealing element (23) includes: a stop plate (231), which is movably sleeved on the outer surface of the inner cylinder (11) and slides on the inner surface of the outer cylinder (12); a first sealing ring (232), which is embedded and fixed in the inner ring of the stop plate (231) and contacts the outer surface of the inner cylinder (11); a second sealing ring (233), which is embedded and fixed in the outer ring of the stop plate (231) and contacts the inner surface of the outer cylinder (12); and a through groove (234), which is opened on the stop plate (231) and is connected to the first sealing ring (232) and the second sealing ring (233) respectively. The sealing member (24) includes: a retaining shell (241), which is movably sleeved on the outer surface of the inner cylinder (11) and slides on the inner surface of the outer cylinder (12); a piston (242), which slides on the inner wall of the retaining shell (241); an arc plate (243), which slides on the retaining shell (241) in a circumferential array, with both ends of the arc plate (243) fixed between the surface of the piston (242) and the surface of the retaining plate (231); and a spring (244), which is fixed in a circumferential array. Between the inner wall of the abutment (241) and the surface of the piston (242); sealing ring three (245), which is embedded and fixed to the outer ring of the abutment (241) and in contact with the inner surface of the outer cylinder (12); sealing ring four (246), which is embedded and fixed to the inner ring of the abutment (241) and in contact with the outer surface of the inner cylinder (11); sealing sleeve (247), which is several in number and is respectively fitted on the surface of multiple arc plates (243) and embedded on the abutment (241).

2. The rotary compensator for corrosion-resistant pipelines based on titanium-zirconium steel composite plates as described in claim 1, characterized in that: The sealing element (24) further includes: a channel one (248), which is opened on the piston (242) and the arc plate (243) and is connected to the through groove (234) and the inner cavity of the abutment (241); a channel two (249), which is opened in the abutment (241) and is connected to the sealing ring three (245), the sealing ring four (246) and the inner cavity of the abutment (241); and a slot (2410), which is opened in the abutment (241) and is connected to the channel two (249) and the sealing sleeve (247).

3. The rotary compensator for corrosion-resistant pipelines based on titanium-zirconium steel composite plates as described in claim 2, characterized in that: The outer cylinder (12) has a flange (121) fixed on one end surface. The sealing mechanism (2) also includes: a fixing member (25) installed on the flange (121) and the abutment (241); the fixing member (25) includes: a connecting plate (251) movably sleeved on the surface of the inner cylinder (11) and fixed on the surface of the abutment (241); screws (252) distributed in a circumferential array, with their two ends penetrating the flange (121) and the connecting plate (251) respectively; nuts (253) in a number of them, which are threaded on both ends of the screws (252) and abut against the flange (121) and the connecting plate (251).

4. The rotary compensator for corrosion-resistant pipelines based on titanium-zirconium steel composite plates as described in claim 1 or 3, characterized in that: The outer cylinder (12) is equipped with a lubrication mechanism (3) for adding lubricating fluid to the ball (15); the lubrication mechanism (3) includes: a lubricating element (31) disposed on the outer cylinder (12); an opening and closing element (32) disposed on the outer cylinder (12) and cooperating with the lubricating element (31); and a lubricating fluid tank (33) fixedly sleeved on the outer surface of the outer cylinder (12) and cooperating with the opening and closing element (32).

5. The rotary compensator for corrosion-resistant pipelines based on titanium-zirconium steel composite plates as described in claim 4, characterized in that: The lubricating component (31) includes: a flow channel one (311) arranged in a circumferential array inside the outer cylinder (12); a flow channel two (312) arranged in a circumferential array inside the outer cylinder (12); a rubber ring (313) embedded and fixed on the inner surface of the outer cylinder (12), located between ring body two (14) and ring body three (16), and connected to flow channel one (311) and flow channel two (312) respectively; a spring three (314) arranged in a circumferential array fixed on the inner surface of the rubber ring (313); a one-way valve one (315) disposed in flow channel one (311); a one-way valve two (316) disposed in flow channel two (312); and a compression block (111) arranged in a circumferential array fixed on one end surface of the inner cylinder (11).

6. The rotary compensator for corrosion-resistant pipelines based on titanium-zirconium steel composite plates as described in claim 5, characterized in that: The opening and closing component (32) includes: a valve column (321), one end of which slides in the flow channel (311); a valve hole (322), which is opened at one end of the valve column (321); a through hole (323), which is opened in a circumferential array on the surface of the valve column (321) and communicates with the valve hole (322); a trigger column (324), which slides on the outer cylinder (12) and is fixed to the other end of the valve column (321); a spring (325), which is sleeved on the surface of one end of the valve column (321) and both ends are fixed between the surface of the trigger column (324) and the surface of the outer cylinder (12), and a connecting hole (331) is opened on the outer cylinder (12) and the lubricating liquid tank (33), and the connecting hole (331) cooperates with the flow channel (311) and the through hole (323).

7. The rotary compensator for corrosion-resistant pipelines based on titanium-zirconium steel composite plates as described in any one of claims 1, 2, 5, and 6, characterized in that: Both the outer cylinder (12) and the inner cylinder (11) include a zirconium layer (41) and a titanium layer (42), with the zirconium layer (41) fixed to the inner surface of the titanium layer (42).

8. The rotary compensator for corrosion-resistant pipelines based on titanium-zirconium steel composite plates as described in claim 7, characterized in that: The inner surface of the outer cylinder (12) is fixed with a limit ring (17) and it cooperates with the ring body (16). A feeding part (26) is installed on the outer cylinder (12).

Images