Compensator for steel lined teflon pipe

Abstract

This invention discloses a compensator for steel-lined PTFE pipes, relating to the field of PTFE pipe connection technology. It includes a PTFE pipe body, a corrugated pipe, a butt flange, and a connecting flange, with butt flanges fixedly connected to both ends of the corrugated pipe. The invention features three sets of reinforcing structures on the outer wall of the corrugated pipe. When the steel-lined PTFE pipe is connected to the compensator via multiple sets of bolts, these three sets of reinforcing structures can additionally support the flanges of the steel-lined PTFE pipe and the compensator, thus distributing the tensile force of the multiple bolts at these points. This effectively solves the problem of limited bolt connection strength in corrugated pipes used as compensators for steel-lined PTFE pipes. When the internal pressure of the steel PTFE pipe exceeds the bearing capacity limit of the bolt connection, the bolts are prone to excessive tensile and compressive forces, leading to bolt breakage. This situation can pose serious safety hazards and affect the stability and operational safety of the entire pipeline system.

Description

Technical Field

[0001] This invention relates to the field of PTFE-lined pipe connection technology, and more particularly to a compensator for PTFE-lined pipes. Background Technology

[0002] PTFE-lined pipe compensators are compensation devices used in pipeline systems, primarily to compensate for thermal expansion and contraction or deformation caused by temperature changes, vibration, or installation errors. They effectively reduce stress and deformation in pipeline systems, maintaining overall pipeline stability and safety. These compensators consist of a steel outer shell and an inner PTFE lining, possessing properties such as corrosion resistance, high-temperature resistance, and wear resistance. They are suitable for pipeline systems in industries such as chemical, pharmaceutical, and petroleum, ensuring long-term stable pipeline operation.

[0003] As a connection method for compensators using steel-lined PTFE pipes, corrugated pipes have the disadvantage of limited bolt connection strength. When the internal pressure of the steel PTFE pipe exceeds the bearing capacity of the bolt connection, the bolt is prone to excessive tensile and compressive forces, leading to bolt breakage. This situation can pose serious safety hazards, affecting the stability and operational safety of the entire pipeline system. The strength of the bolt connection limits the pressure-bearing capacity of the steel-lined PTFE pipe compensator, restricting its application in high-pressure environments. Furthermore, independent bolt connections may also be affected by environmental factors and operating conditions. For example, temperature changes and vibrations may exacerbate bolt fatigue and damage risks, further weakening the stability and safety of the connection. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies where corrugated pipes are used as the connection method for compensators of steel-lined PTFE pipes. These limitations include the limited strength of bolted connections. When the internal pressure of the steel PTFE pipe exceeds the bearing capacity of the bolted connection, the bolt is easily subjected to excessive tensile and compressive forces, leading to bolt breakage. This situation can pose serious safety hazards, affecting the stability and operational safety of the entire pipeline system. The strength of the bolted connection limits the pressure-bearing capacity of the steel-lined PTFE pipe compensator, restricting its application in high-pressure environments. Furthermore, independent bolted connections may also be affected by environmental factors and usage conditions. For example, temperature changes and vibrations may exacerbate bolt fatigue and damage risks, further weakening the stability and safety of the connection. Therefore, this invention proposes a compensator for steel-lined PTFE pipes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A compensator for steel-lined PTFE pipe includes a PTFE pipe body, a bellows, a butt flange, and a connecting flange. The bellows is fixedly connected to both ends, and the PTFE pipe body is fixedly connected to the end. The connecting flange and the butt flange have a circular array of mounting holes on their sides, and butt bolts are inserted into the mounting holes. The outer wall of the bellows is provided with three sets of reinforcing structures to improve the strength of the connection position of the connecting flange and the butt flange. The bellows has a drive assembly on one side of the reinforcing structure to drive the movement of the reinforcing structure.

[0007] Optionally, the reinforcing structure includes an extension rod, a connecting block, and a vertical plate. The extension rod is movably inserted into a limiting plate in the vertical direction, and a horizontal column is fixedly connected to the side of the limiting plate.

[0008] Optionally, a limiting shoulder is fixedly connected to the top of the horizontal column, and a T-slot is arranged in a circular array on the side of the mating flange, into which the horizontal column is movably inserted.

[0009] Optionally, the drive assembly includes a drive ring, a connecting ring, and a drive column. Both ends of the connecting ring are fixedly connected to the drive ring, and the drive ring has three sets of inclined grooves in a circular array on its side.

[0010] Optionally, a drive column is movably inserted into the inclined groove, and a vertical plate is vertically fixedly connected to the bottom edge of the extension rod. The vertical plate is Y-shaped, and mounting rings are fixedly connected to both sides of the bottom of the vertical plate.

[0011] Optionally, a hexagonal shoulder is fixedly connected to one end of the connecting ring, and the hexagonal shoulder is threaded into the outer wall of both ends of the bellows. A synchronization component is provided at the side edge of the hexagonal shoulder to drive the two sets of drive components to rotate synchronously.

[0012] Optionally, the total length of the two sets of mounting rings and vertical plates is equal to the length of the connecting ring axis. The drive column passes through the mounting ring, and a fixing bolt is screwed into the top of the mounting ring. A mating hole is symmetrically opened at the center line position of the drive column, and the tail of the fixing bolt passes through the mating hole.

[0013] Optionally, a mating block is fixedly connected to the bottom edge of the extension rod, and a mating groove is arranged in a circular array on the side of the connecting flange. The mating block and the mating groove have the same cross-sectional dimensions.

[0014] Optionally, the synchronization component includes a connecting block, a synchronization rod, and a common head. The connecting block is fixedly disposed at the center line position of the hexagonal shoulder side, and the synchronization rod is fixedly connected to one end of the connecting block.

[0015] Optionally, both sets of synchronizing rods are movably inserted into both ends of the same common head, the common head having a cylindrical cavity on its side and an insertion hole at the middle of its side.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. This invention features three sets of reinforcing structures on the outer wall of the corrugated pipe. When the PTFE-lined steel pipe is connected to the compensator via multiple sets of bolts, these three sets of reinforcing structures can additionally support the flanges of the PTFE-lined steel pipe and the compensator, thus sharing the tensile force of the multiple bolts at these locations. This effectively solves the problem of limited bolt connection strength in corrugated pipes used as compensators for PTFE-lined steel pipes. When the internal pressure of the PTFE-lined steel pipe exceeds the bearing capacity of the bolt connection, the bolts are prone to excessive tensile and compressive forces, leading to bolt breakage. This situation may pose serious safety hazards, affecting the stability and operational safety of the entire pipeline system. Furthermore, this invention effectively improves the pressure-bearing capacity of the PTFE-lined steel pipe compensator, filling the gap in its application under high-pressure environments.

[0018] 2. This invention takes into account the ease of operation and coordination of the reinforced structure design. A drive assembly is provided on one side of each of the three sets of reinforced structures. This design allows for the simultaneous drive of all three sets of reinforced structures, enabling them to smoothly engage with the flange side of the PTFE tube body. The advantage of this design is that it simplifies the operation process of the reinforced structure, eliminating the need to handle each set of reinforced structures individually; instead, the drive assembly completes all actions at once, improving operational efficiency. Simultaneously, this design ensures the synchronization of the three sets of reinforced structures, avoiding instability caused by asynchronous operation. Therefore, this design scheme of the invention makes the operation of the reinforced structure simpler and more efficient, providing convenience and operational advantages for workers.

[0019] 3. This invention is a compensator design, unique in that each end of the bellows has a drive assembly, and these assemblies are connected by a synchronization assembly. This design allows operators to simultaneously control the drive assemblies at both ends using tools. These two sets of drive assemblies, in turn, control the movement of six sets of reinforcing structures. This precise design enables the compensator to be quickly installed and removed from the PTFE-lined steel pipe. Through simple operating methods, the installation and disassembly of this compensator become highly efficient and convenient. This engineering innovation greatly improves the ease of use and installation efficiency of the equipment, bringing substantial convenience and benefits to the industrial sector. This design not only saves time but also provides a safer and more reliable equipment installation solution, bringing a better operating experience and work efficiency to workers in related industries. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention installed on a steel-lined PTFE tube;

[0021] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 3 A schematic diagram illustrating the connection between the structure and the drive components;

[0023] Figure 4 This is a structural diagram of the drive component and its connectors;

[0024] Figure 5 A structural diagram to reinforce the structure and its connecting parts;

[0025] Figure 6 for Figure 5 A schematic diagram of the localized explosion structure;

[0026] In the diagram: 1. PTFE tube body; 2. Connecting flange; 3. Butt bolt; 4. Butt groove; 5. Mounting hole; 6. Butt flange; 7. T-slot; 8. Bellows; 9. Common head; 10. Insertion hole; 11. Drive ring; 12. Inclined groove; 13. Hexagonal shoulder; 14. Connecting ring; 15. Connecting block; 16. Synchronizing rod; 17. Extension rod; 18. Fixing bolt; 19. Drive column; 20. Mounting ring; 21. Vertical plate; 22. Limiting plate; 23. Horizontal column; 231. Limiting shoulder; 24. Butt block; 25. Butt hole. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] Reference Figure 1-6 A compensator for steel-lined PTFE pipe includes a PTFE pipe body 1, a corrugated pipe 8, a butt flange 6, and a connecting flange 2. The corrugated pipe 8 is fixedly connected to both ends of the butt flange 6, and the PTFE pipe body 1 is fixedly connected to the end of the connecting flange 2. The sides of the connecting flange 2 and the butt flange 6 are circularly arrayed with mounting holes 5, and butt bolts 3 are inserted into the mounting holes 5. The butt bolts 3 include bolt shanks and nuts. The connecting flange 2 and the butt flange 6 have the same cross-sectional dimensions.

[0030] The corrugated section 8 is corrugated in the middle, mainly used to compensate for thermal expansion and contraction or deformation of the pipeline caused by temperature changes, vibration or installation errors. It can effectively reduce the stress and deformation of the pipeline system, maintain the overall stability and safety of the pipeline, and the two ends of the outer wall of the corrugated pipe 8 are provided with external threads, which makes it easy to screw into the hexagonal shoulder 13.

[0031] The outer wall of the bellows 8 is provided with three sets of reinforcing structures to improve the strength of the connection position of the connecting flange 2 and the mating flange 6. The reinforcing structures include an extension rod 17, a mating block 24, and a vertical plate 21. The extension rod 17 is inserted into the limit plate 22 in the vertical direction. A horizontal column 23 is fixedly connected to the side of the limit plate 22.

[0032] The top of the horizontal column 23 is fixedly connected to the limiting shoulder 231. The side of the mating flange 6 has a circular array of T-slots 7. The horizontal column 23 is movably inserted into the T-slots 7. The setting of the horizontal column 23 and the limiting shoulder 231 assists the three sets of extension rods 17 to move closer or further away from each other under the drive of the drive assembly. One end of the horizontal column 23 is inserted into the T-slot 7, so that when the extension rods 17 drive the three sets of mating blocks 24 to move laterally, they can still move closer to each other.

[0033] The bellows 8 has a drive assembly on one side of the reinforcing structure to drive the reinforcing structure to move. The drive assembly includes a drive ring 11, a connecting ring 14, and a drive column 19. Both ends of the connecting ring 14 are fixedly connected to the drive ring 11. The drive ring 11 has three sets of inclined grooves 12 in a circular array on its side. The long symmetry line of the inclined groove 12 is not parallel to any diameter line of the drive ring 11.

[0034] When the drive column 11 moves to the center of the drive ring 11 near the inclined groove 12, the drive column 11 will drive the three sets of extension rods 17 to move towards each other, thereby driving the docking block 24 at one end of the extension rod 17 to move into the docking groove 4.

[0035] A drive column 19 is movably inserted into the inclined groove 12. A vertical plate 21 is vertically fixed to the bottom edge of the extension rod 17. The vertical plate 21 is Y-shaped to improve the connection rigidity between the vertical plate 21 and the extension rod 17. Mounting rings 20 are fixedly connected to both sides of the bottom of the vertical plate 21. A hexagonal shoulder 13 is fixedly connected to one end of the connecting ring 14. The hexagonal shoulder 13 is threaded into the outer walls of both ends of the bellows 8.

[0036] The hexagonal shoulder 13 is designed to facilitate the use of a large wrench to rotate the integrated structure of the hexagonal shoulder 13. It should be added that, since the hexagonal shoulder 13 is screwed into the outer wall of the bellows 8, the three sets of mating blocks 21 move laterally and move towards each other. In the initial state, the mating blocks 21 are farthest from each other, so that the connecting flange 2 can smoothly approach one side of the mating flange 6.

[0037] A synchronization component is provided at the side edge of the hexagonal shoulder 13 to drive the two sets of drive components to rotate synchronously. The total length of the two sets of mounting rings 20 and vertical plate 21 is equal to the length of the axis of the connecting ring 14. Since the drive rings 11 are all set on the same connecting ring 14, the setting of the mounting rings 20 makes the drive column 19 and the vertical plate 21 detachable, which makes it easy for the drive column 19 to be inserted and installed between the two sets of drive rings 11. Therefore, when the drive ring 11 is moved, it will pull the drive column 19 and other integrated structures to move laterally in the horizontal direction.

[0038] The drive column 19 is inserted into the mounting ring 20. A fixing bolt 18 is screwed into the top of the mounting ring 20. A mating hole 25 is symmetrically opened at the center line of the drive column 19. The tail of the fixing bolt 18 is inserted into the mating hole 25. A mating block 24 is fixedly connected to the bottom edge of the extension rod 17. A mating groove 4 is arranged in a circular array on the side of the connecting flange 2. The mating block 24 and the mating groove 4 have the same cross-sectional dimensions. When the mating block 24 is inserted into the mating groove 4, the connecting flange 2 and the mating flange 6 are relatively fixed.

[0039] The synchronization assembly includes a connecting block 15, a synchronizing rod 16, and a common head 9. The connecting block 15 is fixedly installed at the center line of the side of the hexagonal shoulder 13. One end of the connecting block 15 is fixedly connected to the synchronizing rod 16. Both sets of synchronizing rods 16 are movably inserted into both ends of the same common head 9. A cylindrical cavity is opened on the side of the common head 9, so the synchronizing rods 16 on both sides of the common head 9 can approach each other. One end of the two sets of synchronizing rods 16 can be inserted into the common head 9. An insertion hole 10 is opened in the middle of the side of the common head 9. The diameter of the insertion hole 10 can be arbitrarily selected and is mainly used to insert pry bar-like parts so as to rotate the two sets of synchronizing rods 16.

[0040] The specific implementation steps and principles of this invention are as follows:

[0041] The compensator is installed at both ends of the PTFE tube body 1. The connecting flange 2 of the PTFE tube body 1 is connected to the docking flange 6, and bolts are used to connect the connecting flange 2 of the PTFE tube body 1 to the docking flange 6. In the initial state, the drive column 19 is in the inclined groove 12 closest to the central axis of the pipeline. At this time, the three sets of docking blocks 24 are farthest apart and are on the side of the connecting flange 2. The worker inserts a pry bar into the insertion hole 10 of the common head 9 and manually rotates the pry bar. Through the synchronous rod 16, the two sets of drive rings 11 rotate simultaneously. At this time, the drive column 19 moves along the inclined groove 12, and the paired drive rings 11 are screwed in along the outer wall of the bellows 8. At this time, the three sets of docking blocks 24 are gradually inserted into the docking groove 4, and finally the quick fixation between the two ends of the compensator and the PTFE tube body 1 is completed.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A compensator for a steel lined Teflon pipe comprising a Teflon pipe body (1), a corrugated pipe (8), a butt flange (6), a connecting flange (2), characterized in that, The corrugated pipe (8) is fixedly connected to the two ends of the butt flange (6), and the PTFE tube body (1) is fixedly connected to the end of the connecting flange (2). The connecting flange (2) and the butt flange (6) are both arranged in a circular array with mounting holes (5). The mounting holes (5) are all inserted with butt bolts (3). The outer wall of the corrugated pipe (8) is provided with three sets of reinforcing structures to improve the connection strength of the connecting flange (2) and the butt flange (6). The corrugated pipe (8) is provided with a driving component on one side of the reinforcing structure to drive the reinforcing structure to move. The drive assembly includes a drive ring (11), a connecting ring (14), and a drive column (19). Both ends of the connecting ring (14) are fixedly connected to the drive ring (11). The drive ring (11) has three sets of inclined grooves (12) arranged in a circular array on its side. One end of the connecting ring (14) is fixedly connected to a hexagonal shoulder (13). The hexagonal shoulder (13) is screwed into the outer wall of both ends of the bellows (8). A synchronization component is provided at the edge of the hexagonal shoulder (13) to drive the two sets of drive assemblies to rotate synchronously. The synchronization component includes a connecting block (15), a synchronization rod (16), and a common head (9). The connecting block (15) is fixedly installed at the center line of the side of the hexagonal shoulder (13). The synchronization rod (16) is fixedly connected to one end of the connecting block (15). Both sets of synchronization rods (16) are movably inserted into both ends of the same common head (9). A cylindrical cavity is opened on the side of the common head (9), and an insertion hole (10) is opened in the middle of the side of the common head (9). The reinforcing structure includes an extension rod (17), a docking block (24), and a vertical plate (21). The extension rod (17) is inserted vertically into a limiting plate (22), and a horizontal column (23) is fixedly connected to the side of the limiting plate (22). The top of the horizontal column (23) is fixedly connected to a limiting shoulder (231), and the side of the mating flange (6) has a circular array of T-slots (7), into which the horizontal column (23) is movably inserted. A drive column (19) is movably inserted into the inclined groove (12), and a vertical plate (21) is vertically fixedly connected to the bottom edge of the extension rod (17). The vertical plate (21) is Y-shaped, and mounting rings (20) are fixedly connected to both sides of the bottom of the vertical plate (21).

2. The compensator for steel-lined PTFE pipe according to claim 1, characterized in that, The total length of the two sets of mounting rings (20) and vertical plates (21) is equal to the length of the axis of the connecting ring (14). The drive column (19) is inserted into the mounting ring (20). A fixing bolt (18) is screwed into the top of the mounting ring (20). A docking hole (25) is symmetrically opened at the center line of the drive column (19). The tail of the fixing bolt (18) is inserted into the docking hole (25).

3. The compensator for steel-lined PTFE pipe according to claim 2, characterized in that, The bottom edge of the extension rod (17) is fixedly connected to a mating block (24), and the side of the connecting flange (2) has a circular array of mating grooves (4). The mating block (24) and the mating groove (4) have the same cross-sectional dimensions.

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