Self-anchored deflectable telescopic spherical compensator

Abstract

The present application belongs to the technical field of pipeline connecting parts, and relates to a self-anchored deflectable telescopic spherical compensator, which comprises a spherical deflecting assembly and a telescopic adjusting assembly assembled together, the spherical deflecting assembly being used for angle displacement compensation of a pipeline; and further comprising a self-anchored connecting assembly, the self-anchored connecting assembly comprising a self-anchored disc socket and a self-anchored socket short pipe arranged respectively on two sides of the spherical deflecting assembly and the telescopic adjusting assembly, the self-anchored socket short pipe being in sliding sealing assembly with the telescopic adjusting assembly to realize axial displacement compensation during pipeline operation, and a pipe opening structure on at least one of the self-anchored disc socket and the self-anchored socket short pipe for socket connection with a pipeline to be compensated being a socket structure of an SIA wb interface or a socket structure of an X anchor interface. When connected with the pipeline, the present application can simultaneously consider self-anchoring, angle displacement compensation and axial displacement compensation, and can meet the use requirements of a complex pipeline system.

Description

Technical Field

[0001] This invention belongs to the technical field of pipeline connection components, specifically relating to a self-anchoring deflectable telescopic spherical compensator. Background Technology

[0002] In fluid transportation pipeline systems for water supply and drainage, chemical industry, and heating, pipelines experience axial, angular, or lateral displacements due to various factors such as thermal expansion and contraction caused by changes in ambient temperature, uneven foundation settlement, and equipment vibration. If these displacements are not effectively compensated, they can directly lead to stress concentration within the pipeline, joint seal failure, fluid leakage, and even serious problems such as pipeline structural deformation and damage. This directly impacts the operational safety and service life of the entire pipeline system. Therefore, performance-appropriate pipeline compensation devices are an indispensable core component in fluid transportation pipeline systems.

[0003] To address the need for multi-dimensional displacement compensation in pipelines, Chinese Patent No. CN209115858U discloses a spherical compensation joint. This joint comprises a telescopic tube, a fixed tube, a spherical shell, and a sphere. The telescopic tube can slide axially relative to the fixed tube, compensating for axial displacement of the pipeline. The sphere is nested within the inner cavity of the shell and can rotate in multiple directions within the shell, compensating for angular displacement of the pipeline. Simultaneously, the compression of the sealing ring is adjusted by a gland and fasteners to ensure dynamic sealing performance. This technical solution, through the spherical mating structure of the sphere and shell, allows the joint to achieve a certain angle of rotation while possessing sufficient structural rigidity. Axial displacement compensation is achieved through the relative axial movement of the telescopic tube and the fixed tube, providing both angular and axial compensation capabilities. This overcomes the technical deficiency of traditional spherical compensation structures, which can only achieve single-angle compensation.

[0004] However, the pipe connection interface types in the aforementioned patents are limited and lack active anti-detachment design. When faced with the widely adopted self-anchoring pipe interface standards with built-in anti-detachment and pull-out functions, such as the mainstream SIA wb standard interface or Xanchor standard interface, this connector cannot be directly compatible. In actual on-site construction, the construction party must either purchase and weld specialized metal adapters or incur significant additional civil engineering costs to construct bulky concrete water-retaining supports and anchorage brackets on both sides of the pipe. This not only increases the project installation cost and on-site construction procedures but also introduces additional leakage risks at multiple interfaces.

[0005] Therefore, there is an urgent need for a pipeline compensation structure that can simultaneously provide self-anchoring, angular displacement compensation, and axial displacement compensation to meet the needs of complex pipeline systems. Summary of the Invention

[0006] The purpose of this invention is to propose a self-anchored deflectable telescopic spherical compensator to solve the problem that compensators in the prior art cannot simultaneously accommodate self-anchored pipe interfaces, pipe angular displacement compensation, and axial displacement compensation.

[0007] To solve the above problems, the technical solution of the self-anchored deflectable telescopic spherical compensator provided by the present invention is as follows: A self-anchored deflectable telescopic spherical compensator includes a spherical deflection assembly and a telescopic adjustment assembly assembled together. The spherical deflection assembly is used to compensate for angular displacement of a pipeline. It also includes a self-anchoring connection assembly, which comprises a self-anchoring disc bearing and a self-anchoring socket short pipe respectively disposed on opposite sides of the spherical deflection assembly and the telescopic adjustment assembly. The self-anchoring socket short pipe is slidably sealed to the telescopic adjustment assembly to achieve axial displacement compensation during pipeline operation. At least one of the self-anchoring disc bearing and the self-anchoring socket short pipe has a socket structure for socket connection with the pipeline to be compensated, which is either a SIA wb interface socket structure or a Xanchor interface socket structure.

[0008] Beneficial effects: This invention achieves angular displacement compensation for pipelines through the assembled spherical deflection assembly and telescopic adjustment assembly; the self-anchoring connection assembly can achieve self-anchoring fixation simultaneously when connected to the pipeline to be compensated; the sliding seal assembly of the self-anchored socket short pipe and the telescopic adjustment assembly can ensure the stable realization of axial displacement compensation during pipeline operation; at least one of the self-anchored disc bearing and the self-anchored socket short pipe adopts a socket structure with a SIA wb interface or a Xanchor interface, which can be directly adapted to the pipeline to be compensated with the corresponding interface without the need for additional adapter components, and simultaneously takes into account self-anchoring fixation, angular displacement compensation and axial displacement compensation, meeting the usage requirements of complex pipeline systems.

[0009] Furthermore, the pipe structure has a self-anchoring chamber and a sealing chamber inside. The self-anchoring chamber is used to accommodate the self-anchoring locking component to stop and lock with the welding ring on the pipe socket that is compatible with the SIA wb interface or Xanchor interface; the sealing chamber is used to accommodate the sealing component that realizes the sealing function of the SIA wb interface or Xanchor interface.

[0010] Furthermore, the spherical deflection assembly includes a spherical shell, a deflecting sphere, a spherical flange, and a flange fastener. The first end of the spherical shell is connected to the self-anchoring disc. The interior of the spherical shell is provided with a spherical inner cavity adapted to the outer spherical surface of the deflecting sphere. The deflecting sphere is movably embedded in the spherical inner cavity and its end is connected to the telescopic adjustment assembly, allowing it to deflect at an angle relative to the spherical shell around the center of the spherical inner cavity. A spherical seal is filled in the fitting gap between the inner wall of the spherical inner cavity of the spherical shell and the outer spherical surface of the deflecting sphere. The spherical flange is connected to the second end of the spherical shell through the flange fastener, and is used to axially limit the deflecting sphere.

[0011] Furthermore, the axial position of the spherical flange is adjustable, and the spherical seal is located in the space enclosed by the inner wall of the spherical cavity, the outer spherical surface of the deflecting sphere, and the end of the spherical flange.

[0012] Beneficial effects: By adjusting the axial position of the spherical flange, the compression of the spherical seal can be adjusted, ensuring the tightness of the fit between the spherical seal and the mating spherical surface. Even if the spherical seal experiences wear after long-term use, the wear can be compensated by adjusting the axial position of the spherical flange, maintaining stable sealing performance. The spherical seal is located in the space enclosed by the inner wall of the spherical cavity, the outer spherical surface of the deflecting sphere, and the end of the spherical flange, which ensures that the compressive force on the spherical seal is evenly distributed, improving the stability of the seal.

[0013] Furthermore, the inner hole of the spherical flange has a guide spherical surface that is adapted to the outer spherical surface of the deflecting sphere, and a set radial gap is reserved between the guide spherical surface and the outer spherical surface of the deflecting sphere; the inner hole of the spherical flange also has a relief hole section for limiting the deflection angle of the deflecting sphere, and the minimum diameter of the relief hole section is smaller than the maximum outer diameter of the spherical surface of the deflecting sphere.

[0014] Beneficial effects: The guide spherical surface can provide stable guidance for the deflection of the deflecting ball, ensuring smooth and stable deflection. The pre-set radial gap between the guide spherical surface and the outer spherical surface of the deflecting ball provides sufficient space for the axial adjustment of the spherical flange, while also providing suitable movement allowance for the deflection of the deflecting ball. The clearance hole section set in the inner hole of the spherical flange can limit the deflection angle of the deflecting ball, and at the same time form a reliable anti-dislodgement limit for the deflecting ball.

[0015] Furthermore, the clearance section is a flared tapered section.

[0016] Beneficial effects: When the deflecting ball deflects to a large angle, it can provide sufficient space for the swing end of the deflecting ball, avoid rigid collision between the deflecting ball and the spherical flange, and at the same time, it can form a stable angle hard limit through the conical surface of the conical hole section, accurately control the maximum deflection angle of the deflecting ball, and ensure the safety and controllability of the deflection compensation process.

[0017] Furthermore, the telescopic adjustment assembly includes a flange sleeve, a straight pipe flange, and adjusting fasteners. The flange sleeve is connected to the end of the deflecting ball away from the spherical flange. The inner cavity of the flange sleeve is coaxially and slidably fitted with the self-anchored short pipe, and a sliding seal is provided between the sliding surfaces of the two. The straight pipe flange is sleeved on the outside of the self-anchored short pipe and can axially compress the sliding seal. Axial position adjustment is achieved by connecting the adjusting fasteners to the flange sleeve.

[0018] Furthermore, the sliding seal adopts a bidirectional double-lip structure, including an inner lip and an outer lip. The inner lip is interference-fitted with the outer wall of the self-anchored short pipe, and the outer lip is interference-fitted with the inner wall of the flange sleeve, forming a bidirectional dynamic sealing structure.

[0019] Beneficial effects: It can ensure that the self-anchored socket short pipe maintains stable and reliable sealing performance throughout the entire axial sliding stroke.

[0020] Furthermore, the straight pipe flange is coaxially sleeved outside the flange sleeve and has a clearance fit with the flange sleeve. The straight pipe flange is provided with a stop step, which squeezes the sliding seal through the stop step. The sliding seal simultaneously seals the gap between the straight pipe flange and the flange sleeve.

[0021] Furthermore, the self-anchored disc bearing and the self-anchored socket short pipe have the same port structure for socket connection with the pipe to be compensated, both being either a SIA wb interface socket structure or a Xanchor interface socket structure.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects: This invention is compatible with SIA wb interfaces or Xanchor interfaces for self-anchoring fixation, eliminating the need for additional adapters to achieve anchoring connections with pipelines of the corresponding standards. This reduces pipeline installation procedures and additional leakage risk points, lowering project costs. Simultaneously, this invention also considers angular and axial displacement compensation for pipelines, adapting to the complex displacement requirements under various conditions during pipeline operation. This avoids problems such as stress concentration, interface sealing failure, and even structural damage caused by uncompensated displacement.

[0023] This invention adopts a detachable structural design, with each functional component connected by flanges and fasteners. The corresponding seals, deflection balls and other vulnerable parts can be disassembled and replaced individually without dismantling the entire pipeline. This provides ample operating space, improves maintenance efficiency, and reduces the difficulty and cost of later operation and maintenance. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the self-anchored deflectable telescopic spherical compensator of the present invention; Figure 2 This is a schematic diagram of the spherical deflection assembly. Figure 3 This is a schematic diagram of the spherical flange structure; Figure 4 This is a schematic diagram illustrating the application of Embodiment 1 of the self-anchored deflectable telescopic spherical compensator of the present invention; Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the self-anchored deflectable telescopic spherical compensator of the present invention; Figure 6 This is a schematic diagram illustrating the application of Embodiment 2 of the self-anchored deflectable telescopic spherical compensator of the present invention.

[0025] Explanation of reference numerals in the attached drawings: 1. Self-anchoring disc bearing; 2. Flange bolt; 3. First flange gasket; 4. Spherical shell; 41. Shell flange; 42. Stop step; 5. Spherical sealing ring; 6. Flange bolt; 7. Spherical flange; 71. Guide spherical surface; 72. Clearance hole section; 8. Deflecting sphere; 81. Spherical flange; 82. Horizontal pipe section; 9. Second flange gasket; 10. Flange sleeve; 11. Adjusting bolt; 12. Y-type sealing ring; 13. Straight pipe flange; 14. Self-anchoring socket short pipe; 15. Self-anchoring chamber; 16. Sealing chamber; 17. Pre-sealing ring; 18. Self-anchoring locking component; 19. Welding ring; 20. Upstream pipe to be compensated; 21. Downstream pipe to be compensated; 22. Adjusting nut; 100. Self-anchoring disc bearing; 200. Self-anchoring socket short pipe. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0027] Embodiment 1 of the self-anchored deflectable telescopic spherical compensator of the present invention: The self-anchored deflectable telescopic spherical compensator adopts a coaxial series structure design. All functional components are assembled into a complete whole through standardized flanges and fasteners. Pre-assembly and sealing performance testing are completed before leaving the factory. On-site, only the connection of both ends to the pipeline to be compensated needs to be completed before it can be put into use.

[0028] like Figure 1 As shown, the self-anchored deflectable telescopic spherical compensator includes a spherical deflection assembly, a telescopic adjustment assembly, a self-anchoring connection assembly, and a sealing assembly.

[0029] The self-anchoring connection assembly includes a self-anchoring disc bearing 1 and a self-anchoring socket short pipe 14 arranged coaxially; the spherical deflection assembly includes a spherical shell 4, a deflecting ball 8, a spherical flange 7, and flange fasteners; the telescopic adjustment assembly includes a flange sleeve 10, a straight pipe flange 13, and adjusting fasteners. The multi-seal components in the sealing assembly are divided into three categories: spherical seals, axial sliding seals, and flange static seals. The spherical seal is a spherical sealing ring 5 disposed between the spherical shell 4 and the deflecting ball 8; the axial sliding seal is a Y-shaped sealing ring 12 disposed between the flange sleeve 10 and the self-anchoring socket short pipe 14; and the flange static seal consists of a first flange gasket 3 disposed between the self-anchoring disc bearing 1 and the spherical shell 4, and a second flange gasket 9 disposed between the deflecting ball 8 and the flange sleeve 10.

[0030] In this embodiment, for ease of description, the axial direction of the entire self-anchored deflectable telescopic spherical compensator is defined as the front-back direction.

[0031] The self-anchored socket short pipe 14 and the self-anchored disc bearing 1 are located at the front and rear ends of the entire self-anchored deflectable telescopic spherical compensator, respectively, and are both used to connect to the pipeline to be compensated. The self-anchored disc bearing 1 is an integrally cast flange-type disc bearing structure, comprising a coaxially arranged flange section and a first socket section. The flange section has a flange, and the first socket section is used for socket anchoring with the downstream pipeline to be compensated 21. The self-anchored socket short pipe 14 comprises a coaxially arranged second socket section and a straight pipe section. The second socket section is used for socket anchoring with the upstream pipeline to be compensated 20. In this embodiment, the structure of the first socket section is the same as that of the second socket section, as shown below. Figure 1 and Figure 4 As shown, both types of pipe joint structures used for spigot connection with the pipe to be compensated are standard SIA wb interface socket structures, which can be spigot anchored to pipe joint structures with standard SIA wb interfaces.

[0032] Since the first and second socket sections have the same structure, the following explanation uses the structure of the second socket section as an example. The second socket section's pipe end structure has a self-anchoring chamber 15 and a sealing chamber 16 arranged sequentially from front to back. The self-anchoring chamber 15 contains a self-anchoring locking component 18, which is a self-anchoring body that locks against the welding ring 19 on the pipe spigot adapted to the SIA wb interface, thus achieving self-anchoring. The sealing chamber 16 is used to accommodate the pre-sealing rubber ring 17 that performs the sealing function of the SIA wb interface. Figure 4 As shown, the spigot end of the upstream pipe to be compensated 20 can be directly coaxially inserted into the second socket section. After insertion, the welding ring 19 of the spigot of the upstream pipe to be compensated 20 and the self-anchoring locking component 18 form a stop lock, realizing the self-locking fixation of the upstream pipe to be compensated 20 and the compensator. At the same time, the pre-sealing rubber ring 17 in the compression sealing chamber 16 on the outer wall of the spigot of the upstream pipe to be compensated 20 realizes the pre-sealing of the socket connection end face, without the need for additional anchoring structures and sealing processes, and without the need to set concrete supports or anchor brackets outside the pipe. Similarly, the connection method between the self-anchoring disc bearing 1 and the downstream pipe to be compensated 21 is the same as above, and will not be described in detail here.

[0033] It should be noted that the standard SIA wb interface includes a matching socket structure and a pipe spigot structure, both of which are existing technologies. The structure can be referenced in the second socket structure of the Chinese invention patent application with publication number CN121273993A, and will not be detailed here. In this embodiment, both the self-anchoring disc bearing 1 and the self-anchoring socket short pipe 14 have standard SIA wb interface socket structures. Therefore, the adapted pipe to be compensated has a standard SIA wb interface pipe spigot structure, specifically referring to the first section of the pipe spigot structure in the aforementioned patent document. During installation, the spigot ends of the two pipes to be compensated can be directly inserted into the first and second socket sections respectively. Axial anchoring of the pipe is achieved through the internal self-anchoring locking component 18, eliminating the need for additional concrete supports or anchor brackets on the outside of the pipe. The pre-sealing rubber ring 17 achieves preliminary sealing of the interface after the socket connection is completed. The straight pipe section of the self-anchoring socket short pipe 14 is a smooth, seamless steel pipe structure, with its outer wall slidingly fitted with the inner cavity of the flange sleeve 10. In actual production, stroke scale markings distributed along the axial direction can be machined on the outer wall of the straight pipe section. The range of the scale markings corresponds to the maximum expansion and contraction, allowing installers to intuitively read the current axial expansion and contraction, which is convenient for on-site installation and commissioning.

[0034] like Figure 1 and Figure 2 As shown, the spherical shell 4 is a hollow shell structure integrally cast. Both its front and rear ends are machined with shell flanges 41. The rear shell flange 41 is fixedly connected to the flange on the self-anchoring bearing 1 by flange bolts 2. The first flange gasket 3 is placed between the connection surfaces of the shell flange 41 and the flange. The spherical shell 4 has a spherical inner cavity machined inside. The inner diameter of the spherical inner cavity matches the outer diameter of the deflecting sphere 8, and the center of the spherical inner cavity is located on the axis of the entire self-anchoring deflectable telescopic spherical compensator. The deflecting sphere 8 is a hollow spherical structure integrally cast, with an interior fluid channel matching the diameter of the pipe to be connected. The spherical curvature of the spherical inner cavity is consistent with the curvature of the outer spherical surface of the deflecting sphere 8, forming a high-precision spherical fit. Both have a common center of rotation, allowing the deflecting sphere 8 to rotate freely in all directions within the spherical inner cavity around this center of rotation.

[0035] like Figure 2 As shown, a spherical flange 81 is machined at the front end of the deflecting sphere 8, which is used for fixed connection with the flange sleeve 10. A stop step 42 is machined at the front edge of the spherical inner cavity. The spherical seal fills the mating gap between the inner wall of the spherical inner cavity of the spherical shell 4 and the outer spherical surface of the deflecting sphere 8. The inner and outer surfaces of the spherical seal are both arc-shaped structures adapted to the mating spherical surfaces, which can achieve complete fit with the inner and outer spherical surfaces.

[0036] like Figure 3As shown, the inner hole of the spherical flange 7 is machined with a guide spherical surface 71 that matches the outer spherical surface of the deflecting sphere 8, such as... Figure 2 As shown, a certain radial gap is reserved between the guide spherical surface 71 and the outer spherical surface of the deflecting sphere 8. This radial gap ensures that the deflecting sphere 8 can deflect normally. The spherical flange 7 is fixedly connected to the housing flange 41 at the front end of the spherical housing 4 by flange bolts 6 evenly distributed along the circumference. Tightening the flange bolts 6 can push the spherical flange 7 to move axially, thereby compressing the spherical sealing ring 5 through the deflecting sphere 8. Adjusting the radial compression of the spherical sealing ring 5 ensures the tightness of the sealing surface and ensures that the spherical sealing ring 5 always maintains a stable interference fit with the inner and outer spherical surfaces during the full-angle deflection of the deflecting sphere 8, achieving reliable sealing under deflection dynamic conditions. The spherical sealing ring 5 cooperates with the aforementioned stop step 42 during the compression process.

[0037] In this embodiment, the spherical sealing ring 5 is made of a composite material of nitrile rubber and reinforcing fiber, which has good elasticity, wear resistance, and tear resistance. It can maintain stable sealing performance during the repeated rotation of the deflecting ball 8 without excessive wear or sealing failure. The aforementioned radial clearance provides sufficient space for the axial advancement of the spherical flange 7. Even if the spherical sealing ring 5 wears after long-term operation, the spherical flange 7 can still be further advanced by tightening the flange bolt 6 to compensate for the wear of the spherical sealing ring 5 and ensure long-term stable sealing performance.

[0038] like Figure 3 As shown, the inner hole of the spherical flange 7 is also machined with a clearance section 72. The clearance section 72 is a flared conical section. The minimum inner diameter of the clearance section 72 is smaller than the maximum spherical outer diameter of the deflecting ball 8. When the pipeline to be compensated experiences axial tension, negative pressure, or other working conditions, it can prevent the deflecting ball 8 from detaching from the end of the spherical shell 4, ensuring that the deflecting ball 8 is always constrained within the inner cavity of the spherical shell 4. The clearance section 72 adopts a flared structure. When the deflecting ball 8 deflects to a large angle, the rear swing end of the deflecting ball 8 can be accommodated within this flared structure, avoiding a rigid collision between the end of the deflecting ball 8 and the inner wall of the spherical shell 4. The clearance section 72, together with the aforementioned radial clearance, constitutes the deflection clearance space, further expanding the maximum deflectable angle of the deflecting ball 8 and compensating for the limitation of the deflection angle in traditional compensators. The cone angle of the clearance hole section 72 satisfies the following: when the deflecting ball 8 deflects to the maximum safe angle designed, the outer wall of the corresponding horizontal pipe section 82 of the deflecting ball 8 will come into contact with the cone surface of the clearance hole section 72, forming a hard limit, which avoids the deflecting ball 8 from deflecting too much, causing the spherical sealing ring 5 to detach from the sealing surface and resulting in sealing failure, while avoiding the rigid impact between the deflecting ball 8 and the spherical shell 4.

[0039] In this embodiment, the deflecting sphere 8 can deflect relative to the spherical shell 4 within a range of 0~30°, which can adapt to the angular displacement compensation requirements of the pipeline in any direction within this angle range.

[0040] like Figure 1 As shown, the flange sleeve 10 is a hollow cylindrical structure with a connecting flange at the rear end. The second flange gasket 9 is disposed between the connecting flange and the ball flange 81. The inner wall of the flange sleeve 10 is precision machined, and the surface roughness and dimensional accuracy meet the requirements for sliding seals, allowing it to form a stable sliding fit with the straight pipe section of the self-anchored short pipe 14.

[0041] The straight pipe flange 13 is a circular disc coaxially fitted onto the outer wall of the straight pipe section of the self-anchored short pipe 14. It can slide freely along the outer wall of the straight pipe section and is integrally formed from ductile iron, cast steel, or carbon steel, possessing sufficient axial rigidity. The straight pipe flange 13 includes a coaxial disc body and a sleeve formed on the disc body. A sliding through hole with a diameter slightly larger than the outer diameter of the straight pipe section of the self-anchored short pipe 14 is opened at the center of the disc body. Bolt holes corresponding one-to-one with the flange through holes on the spherical flange 81 and the flange sleeve 10 are evenly distributed along the circumference of the disc body. The minimum diameter of the inner hole of the sleeve is larger than the inner hole of the disc body, thus forming a stop step between the right end of the sleeve and the disc body.

[0042] In this embodiment, as Figure 1 As shown, the spherical flange 81, flange sleeve 10, and straight pipe flange 13 are connected as a whole by adjusting bolts 11. Adjusting bolt 11 is a double-ended bolt structure, passing through flange holes on the spherical flange 81 and flange sleeve 10, as well as bolt holes on the disc. A lock nut is threaded onto the rear side of the adjusting bolt 11, opposite to the flange sleeve 10, and an adjusting nut 22 is threaded onto the front side of the adjusting bolt 11, thus stably connecting the deflecting spherical flange 81, flange sleeve 10, and straight pipe flange 13. Tightening the adjusting nut 22 adjusts the axial position of the straight pipe flange 13.

[0043] To facilitate the axial adjustment of the straight pipe flange 13, as one implementation method, a first guide flaring structure is provided at the left end of the inner hole of the insert near the flange sleeve 10. The first guide flaring structure facilitates the insertion of the straight pipe flange 13 onto the outside of the flange sleeve 10. The Y-type sealing ring 12 is disposed between the sliding mating surfaces of the flange sleeve 10 and the self-anchored short pipe 14, and has a bidirectional double-lip structure. Its inner lip is interference-fitted with the outer wall of the self-anchored short pipe 14, and its outer lip is interference-fitted with the inner wall of the flange sleeve 10, forming a bidirectional dynamic sealing structure. Regardless of the direction from which the pipeline medium applies pressure, it can push the corresponding lip to further fit against the pipe wall, increase the sealing specific pressure, and ensure that the self-anchored short pipe 14 maintains stable sealing performance throughout its entire axial sliding stroke. By rotating the adjusting nut 22, the stop step on the straight pipe flange 13 can be driven to squeeze the end of the Y-type sealing ring 12. By axially compressing the Y-type sealing ring 12, the interference of the lip is adjusted to ensure that the sealing performance remains stable during the repeated axial sliding of the self-anchored short pipe 14.

[0044] In addition, to facilitate sealing, a second guide flaring structure is provided at the front end of the inner hole of the flange sleeve 10. The flaring direction of the second guide flaring structure is opposite to that of the first guide flaring structure.

[0045] The inner cavity of the flange sleeve 10 has a limiting step on the side near the deflecting ball 8 to limit the maximum depth of the self-anchored socket short pipe 14 inserted into the inner cavity of the flange sleeve 10. In this embodiment, the axial expansion and contraction of the self-anchored deflectable telescopic spherical compensator can be adjusted within the range of 0~100mm to meet the thermal expansion and contraction compensation requirements of conventional pipeline systems.

[0046] It should be noted that the materials of all sealing components in this embodiment can be adapted and adjusted according to the characteristics of the conveying medium and the operating conditions to meet the needs of different scenarios.

[0047] When installing the self-anchored deflectable telescopic spherical compensator of this invention on site, firstly, according to the designed pipeline laying path, the initial insertion depth of the self-anchored socket short pipe 14 is adjusted by adjusting bolt 11 to adjust the overall axial length of the self-anchored deflectable telescopic spherical compensator to match the pipeline installation spacing. Simultaneously, the initial compression of the spherical seal is adjusted by the flange fasteners to ensure that the sealing performance meets the standards. Then, the spigot end of the upstream pipeline to be compensated 20 is coaxially inserted into the second socket section of the self-anchored socket short pipe 14 and pushed in to the designed insertion depth, completing the anchoring connection between the upstream pipeline to be compensated 20 and the self-anchored deflectable telescopic spherical compensator. Next, the spigot end of the downstream pipeline to be compensated 21 is coaxially inserted into the first socket section of the self-anchored disc bearing 1 and pushed in to the designed insertion depth, completing the anchoring connection between the downstream pipeline to be compensated 21 and the self-anchored deflectable telescopic spherical compensator. No additional anchoring supports are required to complete the installation of the entire self-anchored deflectable telescopic spherical compensator.

[0048] The angular displacement compensation principle of the self-anchored deflectable telescopic spherical compensator of this invention is as follows: When a pipeline experiences angular displacement due to factors such as uneven foundation settlement, installation deviation, equipment vibration, or pipeline deviation, the upstream pipeline to be compensated 20 will cause the flange sleeve 10 to tilt synchronously. Since the flange sleeve 10 and the deflecting sphere 8 are rigidly connected, a deflection torque around the center of rotation will be applied to the deflecting sphere 8. Under the action of the deflection torque, the deflecting sphere 8 rotates around the fixed center of rotation in the same direction and angle as the angular displacement of the pipeline to be compensated. The angular deformation of the pipeline to be compensated is completely absorbed by the rotation of the deflecting sphere 8 and will not be transmitted to the downstream pipeline to be compensated 21, nor will it generate bending stress in the pipeline body, thus achieving angular displacement compensation in all directions.

[0049] The spherical sealing ring 5, filling the gap between the inner spherical surface of the spherical shell 4 and the outer spherical surface of the deflecting sphere 8, adopts a spherical structure with the same curvature as the mating spherical surface, allowing it to conform synchronously with the deformation of the spherical surface. The spherical flange 7 is fastened to the spherical shell 4 by flange bolts 6. When the flange bolts 6 are tightened, a continuous and uniform axial preload is applied to the spherical sealing ring 5 through the spherical flange 7, forcing the spherical sealing ring 5 to maintain an interference fit with the inner spherical surface of the spherical shell 4 and the outer spherical surface of the deflecting sphere 8. Since the deflection is a pure rotation around a common center of rotation, the compression of the spherical sealing ring 5 remains uniform throughout the full-angle deflection process, preventing local over-compression or local disengagement. Even at the extreme deflection angle of 30°, the entire sealing surface of the spherical sealing ring 5 remains completely in contact with the inner and outer spherical surfaces, and the sealing pressure remains within the design range, avoiding the risk of leakage during the deflection process. When the spherical seal ring 5 wears out after long-term use, simply tightening the flange bolt 6 will replenish the compression and restore the sealing performance, without disassembling the entire assembly.

[0050] The axial displacement compensation principle of the self-anchored deflectable telescopic spherical compensator of the present invention is as follows: The overall length of the self-anchored deflectable telescopic spherical compensator is the distance from the end face of the second socket section of the self-anchored short pipe 14 to the end face of the first socket section of the self-anchored disc bearing 1. The variation in the overall length of the self-anchored deflectable telescopic spherical compensator is determined by the depth to which the self-anchored short pipe 14 is inserted into the flange sleeve 10; that is, the deeper the insertion, the shorter the overall length; the shallower the insertion, the longer the overall length.

[0051] After the pipeline is put into operation, when thermal expansion and contraction occur due to temperature changes or axial displacement occurs due to foundation settlement, the compensator can automatically achieve axial expansion and contraction compensation without the need for manual adjustment of bolts 11. When the pipeline temperature rises and causes thermal expansion, the upstream pipeline to be compensated 20 will push the self-anchored socket short pipe 14 to overcome the sliding friction between the self-anchored socket short pipe 14 and the Y-type sealing ring 12, sliding into the flange sleeve 10. The insertion depth increases, and the overall length of the self-anchored deflectable telescopic spherical compensator shortens, directly absorbing the thermal expansion of the pipeline to be compensated and avoiding stress concentration caused by thermal expansion. When the pipeline temperature drops and causes cold contraction, the upstream pipeline to be compensated 20 will pull the self-anchored socket short pipe 14 to overcome the sliding friction between the self-anchored socket short pipe 14 and the Y-type sealing ring 12, sliding outward from the flange sleeve 10. The insertion depth becomes shallower, and the overall length of the self-anchored deflectable telescopic spherical compensator lengthens, compensating for the cold contraction of the pipeline and preventing the pipeline joint from being torn. Throughout the entire expansion and contraction process, the bidirectional lip of the Y-shaped sealing ring 12 remains in close contact with the outer wall of the self-anchored short tube 14, maintaining stable sealing performance even during sliding, with no risk of leakage.

[0052] When the pipeline experiences both axial and angular displacement, the telescopic adjustment component and the spherical deflection component can operate synchronously to achieve synchronous compensation for the combined displacement, fully adapting to the complex operating conditions of the pipeline. The self-anchored, deflectable telescopic spherical compensator of this invention adopts a detachable structure, allowing each functional component to be disassembled and replaced individually. When subsequent maintenance or replacement of corresponding seals is required, only the connecting bolts at the corresponding positions need to be removed to individually remove the spherical sealing ring 5 or the Y-type sealing ring 12 for replacement, without the need for complete pipeline disassembly, significantly reducing maintenance difficulty and downtime.

[0053] Embodiment 2 of the self-anchored deflectable telescopic spherical compensator of the present invention: like Figure 5 and Figure 6 As shown, the only difference between this embodiment and Embodiment 1 above is the structure of the self-anchoring disc bearing and the self-anchoring socket short pipe. In this embodiment, both the self-anchoring disc bearing 100 and the self-anchoring socket short pipe 200 have standard Xanchor interface socket structures, which can be used for socket anchoring connection with pipe spigot structures with standard Xanchor interfaces.

[0054] It should be noted that the standard Xanchor interface includes a matching socket structure and a pipe spigot structure, both of which are existing technologies and will not be described in detail here. In this embodiment, both the self-anchored disc bearing and the self-anchored socket short pipe have standard Xanchor interface socket structures; therefore, the pipe to be compensated has a standard Xanchor interface pipe spigot structure. Based on this, the connection between the self-anchored deflectable telescopic spherical compensator and the pipe to be compensated is achieved.

[0055] Embodiment 3 of the self-anchored deflectable telescopic spherical compensator of the present invention: The only difference between this embodiment and Embodiment 1 above is the type of sliding seal. In this embodiment, the sliding seal adopts a U-shaped bidirectional sealing structure, with the inner contact surface tightly fitted to the outer wall of the self-anchored short pipe, and the outer contact surface tightly fitted to the inner wall of the flange sleeve.

[0056] While various embodiments of the invention have been shown and described in this specification, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and essence of the invention.

Claims

1. A self-anchored, deflectable, telescopic spherical compensator, comprising a spherical deflection assembly and a telescopic adjustment assembly assembled together, the spherical deflection assembly being used for angular displacement compensation of a pipeline; characterized in that, It also includes a self-anchoring connection assembly, which includes a self-anchoring disc bearing and a self-anchoring socket short pipe respectively disposed on opposite sides of the spherical deflection assembly and the telescopic adjustment assembly. The self-anchoring socket short pipe is slidably sealed with the telescopic adjustment assembly to achieve axial displacement compensation during pipeline operation. The pipe end structure on at least one of the self-anchoring disc bearing and the self-anchoring socket short pipe for socket connection with the pipeline to be compensated is a socket structure with an SIA wb interface or a socket structure with an Xanchor interface.

2. The self-anchored deflectable telescopic spherical compensator according to claim 1, characterized in that, The pipe structure has a self-anchoring chamber and a sealing chamber inside. The self-anchoring chamber is used to house the self-anchoring locking component to stop and lock with the welding ring on the pipe socket that is compatible with the SIA wb interface or Xanchor interface. The sealing chamber is used to house the sealing component that realizes the sealing function of the SIA wb interface or Xanchor interface.

3. The self-anchored deflectable telescopic spherical compensator according to claim 1, characterized in that, The spherical deflection assembly includes a spherical shell, a deflecting sphere, a spherical flange, and flange fasteners. The first end of the spherical shell is connected to the self-anchoring disc. The interior of the spherical shell is provided with a spherical inner cavity that matches the outer spherical surface of the deflecting sphere. The deflecting sphere is movably embedded in the spherical inner cavity and its end is connected to the telescopic adjustment assembly, allowing it to deflect relative to the spherical shell around the center of the spherical inner cavity. A spherical seal is filled in the fit gap between the inner wall of the spherical inner cavity of the spherical shell and the outer spherical surface of the deflecting sphere. The spherical flange is connected to the second end of the spherical shell through flange fasteners to axially limit the deflecting sphere.

4. The self-anchored deflectable telescopic spherical compensator according to claim 3, characterized in that, The axial position of the spherical flange is adjustable, and the spherical seal is located in the space enclosed by the inner wall of the spherical cavity, the outer spherical surface of the deflecting sphere, and the end of the spherical flange.

5. The self-anchored deflectable telescopic spherical compensator according to claim 3, characterized in that, The inner hole of the spherical flange has a guide spherical surface that is adapted to the outer spherical surface of the deflecting sphere, and a set radial gap is reserved between the guide spherical surface and the outer spherical surface of the deflecting sphere; the inner hole of the spherical flange also has a relief hole section for limiting the deflection angle of the deflecting sphere, and the minimum diameter of the relief hole section is smaller than the maximum outer diameter of the deflecting sphere.

6. The self-anchored deflectable telescopic spherical compensator according to claim 5, characterized in that, The clearance section is a flared tapered section.

7. The self-anchored deflectable telescopic spherical compensator according to claim 3, characterized in that, The telescopic adjustment assembly includes a flange sleeve, a straight pipe flange, and adjusting fasteners. The flange sleeve is connected to the end of the deflecting ball away from the spherical flange. The inner cavity of the flange sleeve is coaxially and slidably fitted with the self-anchored short pipe, and a sliding seal is provided between the sliding mating surfaces of the two. The straight pipe flange is sleeved on the outside of the self-anchored short pipe and can axially compress the sliding seal. The axial position can be adjusted by connecting the adjusting fasteners to the flange sleeve.

8. The self-anchored deflectable telescopic spherical compensator according to claim 7, characterized in that, The sliding seal adopts a bidirectional double-lip structure, including an inner lip and an outer lip. The inner lip is interference-fitted with the outer wall of the self-anchored short pipe, and the outer lip is interference-fitted with the inner wall of the flange sleeve, forming a bidirectional dynamic sealing structure.

9. The self-anchored deflectable telescopic spherical compensator according to claim 7, characterized in that, The straight pipe flange is coaxially sleeved outside the flange sleeve and has a clearance fit with the flange sleeve. The straight pipe flange is provided with a stop step, which squeezes the sliding seal through the stop step. The sliding seal simultaneously seals the gap between the straight pipe flange and the flange sleeve.

10. The self-anchored deflectable telescopic spherical compensator according to claim 1, characterized in that, The self-anchored disc and the self-anchored socket short pipe have the same socket structure for connecting with the pipe to be compensated, which is either a SIA wb interface socket structure or a Xanchor interface socket structure.

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