Polytetrafluoroethylene compensator

Abstract

The polytetrafluoroethylene compensator comprises a first flange plate and a second flange plate, linings are arranged in the first flange plate and the second flange plate, and the linings are at least used for generating deformation after pressure is generated; an elastic steel ring is arranged outside the lining and is at least used for supporting the form of the lining; a plurality of annularly-distributed stabilizing assemblies are arranged between the first flange plate and the second flange plate, the stabilizing assemblies are at least used for connecting the first flange plate and the second flange plate with the lining, and the first flange plate and the second flange plate move under the action of deformation of the lining. A damper is arranged on one side of the stabilizing assembly and at least used for keeping the shape of the lining and keeping the first flange plate and the second flange plate stable. According to the polytetrafluoroethylene compensator, vibration of a pipeline system is reduced, displacement caused by thermal expansion and cold contraction and installation deviation are compensated, enterprise cost is reduced, the service life of a pipeline is prolonged, the sealing performance of the pipeline is improved, the problems which cannot be solved by a metal compensator are solved, and production benefits are improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline connection, in particular to a polytetrafluoroethylene compensator. Background Art

[0002] Steel-lined PTFE isostatic pipes are resistant to chemical corrosion and protect the pipes and the environment. They are suitable for acid, alkali and other corrosive media, high temperature, strong corrosive media (such as HF), high-purity applications, and protection of fluids, food, medicines, and ultrapure water.

[0003] It uses PTFE lining material, has excellent vacuum resistance, optimal anti-permeation performance, and the highest operating temperature reaches 230 degrees. It is mainly suitable for the installation and use of towers and pipelines. High operating temperature: Under strong corrosive media conditions, it can meet the operating temperature range of up to -20℃~230℃. High pressure resistance: At room temperature, it can withstand a working pressure of 3.1MPa, and at 230℃, it can withstand a working pressure of 1.7MPa. Under the above high pressure, the lined pipe still has excellent anti-permeability to the corrosive media it transports. Full vacuum resistance at high temperatures: The ability of PTFE-lined pipes to withstand full vacuum is one of the basic product standards. Every part of each PTFE-lined pipe with specifications of DN25 to DN350 meets the full vacuum rating of 230℃.

[0004] The static pressing process of steel-lined PTFE makes the inner lining pipe slightly larger than the inner diameter of the steel pipe. After the pipe is drawn, it is heated and relaxed to make the inner lining fit tightly against the steel pipe. During the use of the pipeline, due to the inner lining fitting tightly against the steel pipe and the internal stress applied during processing, the alternating hot and cold conditions will result in very small relative displacement of the inner lining and the external steel parts.

[0005] When connecting steel-lined PTFE isostatic pipes, flanges are required to connect adjacent pipes to achieve material transportation. However, at the connection points of steel-lined PTFE isostatic pipes, thermal expansion and contraction caused by temperature changes, installation errors, and vibration are prone to occur, causing deformation or damage to the steel-lined PTFE isostatic pipes, seriously affecting the service life of the steel-lined PTFE isostatic pipes. Therefore, it is urgent to design a polytetrafluoroethylene compensator to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a polytetrafluoroethylene compensator to solve the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above object, the present invention provides the following technical solutions: A polytetrafluoroethylene compensator comprises a first flange and a second flange, wherein the first flange and the second flange are provided with a lining inside, and the lining is used to generate deformation after pressure is generated; An elastic steel ring is provided on the outside of the lining, and the elastic steel ring is at least used to support the shape of the lining; A plurality of annularly distributed stabilizing components are provided between the first flange and the second flange, and the stabilizing components are at least used to connect the first flange and the second flange to the liner, and the first flange and the second flange move under the action of the deformation of the liner; A damper is provided on one side of the stabilizing assembly, and the damper is at least used to maintain the shape of the lining and maintain the stability of flange 1 and flange 2.

[0008] As a preferred solution of the present invention, the lining is made of polytetrafluoroethylene material.

[0009] As a preferred solution of the present invention, the process of processing the polytetrafluoroethylene material into the lining includes extrusion or molding; Extrusion: PTFE fine powder is pressed into thin strips and extruded under high temperature and high pressure; Molding: PTFE pellets are placed in a mold and formed under high temperature and high pressure.

[0010] As a preferred solution of the present invention, polytetrafluoroethylene compensators are divided into the following five categories according to whether their outer surface is reinforced and the reinforcement method: A. Polytetrafluoroethylene corrugated compensator; B. Polytetrafluoroethylene rubber composite corrugated compensator; C. Metal bellows lined with polytetrafluoroethylene bellows compensator; D. Polytetrafluoroethylene metal mesh composite corrugated compensator; E. Polytetrafluoroethylene metal steel sleeve composite corrugated compensator.

[0011] As a preferred solution of the present invention, the structures of flange 1 and flange 2 are the same and are symmetrical with respect to the lining.

[0012] As a preferred solution of the present invention, a plurality of integrally formed ear seats are provided on the outer walls of the flange plate 1 and the flange plate 2, and a plurality of bolt holes are provided on the surfaces of the flange plate 1 and the flange plate 2.

[0013] As a preferred solution of the present invention, both ends of the lining are provided with lips, and the lips are located outside the flange plate 1 and the flange plate 2; The lining is provided with annular grooves both inside and outside; The inside and the outside of the liner are both provided with convex rings, and the convex rings and the annular grooves are distributed at intervals.

[0014] As a preferred solution of the present invention, the stabilizing assembly includes a sleeve, a shaft is fixedly installed inside the sleeve, the top and bottom ends of the shaft are provided with threaded columns, and the external threads of the threaded columns are sleeved with locking nuts; A washer is provided between the locking nut and the first and second flanges, and the washer is sleeved on the threaded column.

[0015] As a preferred solution of the present invention, the damper includes a restraining sleeve fixed to the outside of the stabilizing component, and a magnetic coil is provided inside the restraining sleeve; The outer walls of the first and second flanges are both provided with fixing rods, the ends of the fixing rods are provided with pressure sensors, the pressure sensors are provided with guide rods, and the two guide rods are slidably plugged into the interior of the restraint sleeve.

[0016] As a preferred solution of the present invention, a permanent magnet is provided at the end of the guide rod close to the magnetic coil, and the magnetic coil generates a magnetic force opposite to the permanent magnet on the guide rod when energized; The multiple magnetic coils have the same specifications and are connected in series.

[0017] In the above technical solution, the present invention provides a polytetrafluoroethylene compensator, which reduces the vibration of the pipeline system, compensates for the displacement and installation deviation caused by thermal expansion and contraction, reduces enterprise costs, improves the life and sealing performance of the pipeline, solves problems that cannot be solved by metal compensators, and improves production efficiency.

[0018] Working temperature: -20~230℃, pressure level: 0.25~2.5Mpa, available specifications: DN25~1600mm, continuous fatigue life: ≥10000 times.

[0019] PTFE compensators are primarily used in the connection between pipelines and equipment, such as valves, pumps, flow meters, and pressure sensors. They can connect pipes of different materials and sizes and adapt to a wide range of temperature and pressure conditions. Furthermore, they can withstand varying degrees of displacement and vibration, thereby reducing wear and damage to pipelines and equipment. They can also be used to reduce noise and vibration, and are widely used in modern industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 An angular structural stereogram of a polytetrafluoroethylene compensator embodiment of the present invention is provided.

[0022] Figure 2 Another perspective structural diagram of a polytetrafluoroethylene compensator embodiment of the present invention is provided.

[0023] Figure 3 A schematic cross-sectional view of a polytetrafluoroethylene compensator embodiment of the present invention.

[0024] Figure 4 This is a structural explosion diagram provided for an embodiment of a polytetrafluoroethylene compensator of the present invention.

[0025] Figure 5 A cross-sectional view of the stabilizing component structure provided for an embodiment of a polytetrafluoroethylene compensator of the present invention.

[0026] Figure 6 A cross-sectional view of the damper structure provided for an embodiment of a polytetrafluoroethylene compensator of the present invention.

[0027] Figure 7 A dimensional parameter diagram of a polytetrafluoroethylene compensator provided for an embodiment of the present invention.

[0028] Description of reference numerals: 1. Flange 1; 11. Bolt hole; 12. Ear seat; 2. Flange 2; 3. Lining; 31. Annular groove; 32. Lip; 33. Raised ring; 4. Elastic steel ring; 5. Stabilizing assembly; 51. Sleeve; 52. Shaft; 53. Threaded column; 54. Washer; 55. Locking nut; 6. Damper; 61. Restraint sleeve; 62. Magnetic coil; 63. Guide rod; 64. Pressure sensor; 65. Fixing rod. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] like Figure 1-7 As shown, a polytetrafluoroethylene compensator provided by an embodiment of the present invention includes a flange 1 and a flange 2, and a lining 3 is provided inside the flange 1 and the flange 2, and the lining 3 is at least used to generate deformation after pressure occurs; an elastic steel ring 4 is provided outside the lining 3, and the elastic steel ring 4 is at least used to support the shape of the lining 3; a number of annularly distributed stabilizing components 5 are provided between the flange 1 and the flange 2, and the stabilizing components 5 are at least used to connect the flange 1 and the flange 2 and the lining 3, and the flange 1 and the flange 2 move under the action of the deformation of the lining 3; a damper 6 is provided on one side of the stabilizing component 5, and the damper 6 is at least used to maintain the shape of the lining 3 and maintain the stability of the flange 1 and the flange 2.

[0031] In this embodiment, it includes flange 1 and flange 2; Specifically, the structures of flange 1 and flange 2 are the same and are symmetrical with respect to lining 3; Specifically, a number of integrally formed ear seats 12 are provided on the outer walls of flange 1 and flange 2, and the threaded column 53 of the stabilizing component 5 is inserted into the inside of the ear seat 12. A number of bolt holes 11 are provided on the surface of flange 1 and flange 2, and the connection of the material conveying pipeline is achieved through the cooperation of the bolt holes 11 and the bolts.

[0032] In this embodiment, a lining 3 is provided inside the flange 1 and the flange 2 2, and the lining 3 is at least used to generate deformation after pressure occurs; Specifically, the lining 3 is made of polytetrafluoroethylene material; Specifically, lips 32 are provided at both ends of the lining 3. The lips 32 are located outside the flange 1 and the flange 2. The flange 1 and the flange 2 are sleeved on the outside of the lining 3. The flange 1 and the flange 2 are in contact with the lips 32 of the lining 3. When the flange 1 and the flange 2 are connected to the material conveying pipeline, the lips 32 improve the sealing performance of the polytetrafluoroethylene lining 3. Specifically, annular grooves 31 are provided inside and outside the liner 3; Specifically, convex rings 33 are provided inside and outside the lining 3 , and the convex rings 33 and the annular grooves 31 are spaced apart.

[0033] The processes for forming the polytetrafluoroethylene material into the lining 3 include extrusion or molding; Extrusion: PTFE fine powder is pressed into thin strips and extruded under high temperature and high pressure; Molding: PTFE pellets are placed in a mold and formed under high temperature and high pressure.

[0034] In this embodiment, an elastic steel ring 4 is provided on the outside of the lining 3. The elastic steel ring 4 is used to at least support the shape of the lining 3. The elastic steel ring 4 can maintain the shape of the lining 3. When the flange 1 and the flange 2 are subjected to pressure or vibration, the flange 1 and the flange 2 drive the lining 3 to deform. After the external force disappears, the lining 3 returns to its original shape under the action of the elastic steel ring 4. In this embodiment, a plurality of annularly distributed stabilizing components 5 are provided between flange 1 and flange 2. The stabilizing components 5 are used to connect at least flange 1 and flange 2 to the lining 3. Flange 1 and flange 2 move under the action of deformation of the lining 3. Specifically, the stabilizing assembly 5 includes a sleeve 51, a shaft 52 is fixedly mounted inside the sleeve 51, and threaded posts 53 are provided at the top and bottom ends of the shaft 52. Locking nuts 55 are sleeved on the external threads of the threaded posts 53. Flange 1 and flange 2 are connected through the stabilizing assembly 5. The threaded posts 53 are inserted into the ears 12 on the sides of flanges 1 and 2 and fixed with the locking nuts 55. Specifically, a washer 54 is provided between the locking nut 55 and the flange 1 and the flange 2 2. The washer 54 is sleeved on the threaded column 53. The washer 54 and the locking nut 55 form a fixed connection structure.

[0035] In this embodiment, a damper 6 is provided on one side of the stabilizing assembly 5. The damper 6 is used to at least maintain the shape of the lining 3 and maintain the stability of the flange 1 and the flange 2; Specifically, the damper 6 includes a restraining sleeve 61 fixed to the outside of the stabilizing assembly 5, and a magnetic coil 62 is provided inside the restraining sleeve 61. The magnetic coil 62 is energized to generate a magnetic field; Specifically, a fixing rod 65 is provided on the outer wall of flange 1 and flange 2, and a pressure sensor 64 is provided at the end of the fixing rod 65. A guide rod 63 is provided on the pressure sensor 64. The two guide rods 63 are slidably inserted into the inner part of the restraint sleeve 61. Specifically, a permanent magnet is provided at the end of the guide rod 63 near the magnetic coil 62. When the magnetic coil 62 is energized, a magnetic force opposite to that of the permanent magnet on the guide rod 63 is generated. After the magnetic coil 62 is energized, a magnetic field is generated. The generated magnetic field is opposite to the magnetic force of the permanent magnet at the end of the guide rod 63. The magnetic coil 62 can be used to push the guide rod 63 to move, so that the guide rod 63, the pressure sensor 64 and the fixing rod 65 can achieve stable support for the flange 1 and the flange 2. When the flange 1 and the flange 2 are subjected to external force, the flange 1 and the flange 2 will squeeze the pressure sensor 64. When the pressure sensor 64 reaches a preset value, the pressure sensor 64 controls the magnetic coil 62 to be de-energized. After the magnetic coil 62 is de-energized, the guide rod 63 can slide freely inside the restraint sleeve 61, making the changes of the flange 1 and the flange 2 more sensitive. After the external force disappears, the magnetic coil 62 is re-energized, so that the polytetrafluoroethylene compensator reaches a balanced and stable state again. Specifically, the multiple magnetic coils 62 have the same specifications and are connected in series, so that the multiple magnetic coils 62 can be powered on or off synchronously.

[0036] In this embodiment, polytetrafluoroethylene compensators are divided into the following five categories according to whether their outer surfaces are reinforced and the reinforcement method: A. Polytetrafluoroethylene corrugated compensator; B. Polytetrafluoroethylene rubber composite corrugated compensator; C. Metal bellows lined with polytetrafluoroethylene bellows compensator; D. Polytetrafluoroethylene metal mesh composite corrugated compensator; E. Polytetrafluoroethylene metal steel sleeve composite corrugated compensator.

[0037] The PTFE compensator is pressed and formed by a 250-ton hydraulic press from TSL. Frame hydraulic presses (including gantry hydraulic presses) are characterized by high rigidity and high precision, and are suitable for a variety of processes such as stamping, forming, shallow drawing, shaping, overmolding and trimming of metal or non-metal parts.

[0038] Furthermore, frame-type hydraulic presses typically utilize an all-steel welded structure and undergo vibration aging treatment to minimize mechanical deformation. Finite element analysis is used in the frame design to ensure high rigidity and precision. These presses also feature an independent electrical control system, ensuring reliable operation, intuitive operation, and easy maintenance. They offer a variety of operation modes, including adjustment, inching, automatic, and foot-operated, to meet the needs of diverse usage scenarios.

[0039] Performance test of PTFE compensator: vertical pressure test of PTFE compensator and pressure test of PTFE compensator with inclined installation are carried out, and torsion test of PTFE compensator is carried out.

[0040] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A polytetrafluoroethylene compensator, comprising a flange plate 1 (1) and a flange plate 2 (2), characterized in that: The flange plate 1 (1) and the flange plate 2 (2) are provided with a lining (3) inside, and the lining (3) is at least used to generate deformation after pressure occurs; An elastic steel ring (4) is provided on the outside of the lining (3), and the elastic steel ring (4) is at least used to support the shape of the lining (3); A plurality of annularly distributed stabilizing components (5) are provided between the flange 1 (1) and the flange 2 (2), and the stabilizing components (5) are at least used for connecting the flange 1 (1) and the flange 2 (2) with the lining (3), and the flange 1 (1) and the flange 2 (2) move under the action of the deformation of the lining (3); A damper (6) is provided on one side of the stabilizing component (5), and the damper (6) is at least used to maintain the shape of the lining (3) and maintain the stability of the flange plate 1 (1) and the flange plate 2 (2).

2. A polytetrafluoroethylene compensator according to claim 1, characterized in that: The lining (3) is made of polytetrafluoroethylene material.

3. A polytetrafluoroethylene compensator according to claim 2, characterized in that: The process of forming the polytetrafluoroethylene material into the lining (3) includes extrusion or molding; Extrusion: PTFE fine powder is pressed into thin strips and extruded under high temperature and high pressure; Molding: PTFE pellets are placed in a mold and formed under high temperature and high pressure.

4. A polytetrafluoroethylene compensator according to claim 1, characterized in that: PTFE compensators are divided into the following five categories according to whether their outer surface is reinforced and the reinforcement method: A. Polytetrafluoroethylene corrugated compensator; B. Polytetrafluoroethylene rubber composite corrugated compensator; C. Metal bellows lined with polytetrafluoroethylene bellows compensator; D. Polytetrafluoroethylene metal mesh composite corrugated compensator; E. Polytetrafluoroethylene metal steel sleeve composite corrugated compensator.

5. The polytetrafluoroethylene compensator according to claim 1, characterized in that: The flange 1 (1) and the flange 2 (2) have the same structure and are symmetrical with respect to the lining (3).

6. A polytetrafluoroethylene compensator according to claim 1, characterized in that: A plurality of integrally formed ear seats (12) are provided on the outer walls of the flange plate 1 (1) and the flange plate 2 (2), and a plurality of bolt holes (11) are provided on the surfaces of the flange plate 1 (1) and the flange plate 2 (2).

7. The polytetrafluoroethylene compensator according to claim 1, characterized in that: Both ends of the lining (3) are provided with lips (32), and the lips (32) are located outside the flange plate 1 (1) and the flange plate 2 (2); Annular grooves (31) are provided inside and outside the lining (3); The lining (3) is provided with convex rings (33) both inside and outside, and the convex rings (33) and the annular grooves (31) are spaced apart.

8. The polytetrafluoroethylene compensator according to claim 1, characterized in that: The stabilizing assembly (5) comprises a sleeve (51), a shaft (52) is fixedly mounted inside the sleeve (51), a threaded column (53) is provided at the top and bottom ends of the shaft (52), and a locking nut (55) is sleeved on the external thread of the threaded column (53); A washer (54) is provided between the locking nut (55) and the flange 1 (1) and the flange 2 (2), and the washer (54) is sleeved on the threaded column (53).

9. The polytetrafluoroethylene compensator according to claim 1, characterized in that: The damper (6) comprises a restraining sleeve (61) fixed to the outside of the stabilizing component (5), and a magnetic coil (62) is provided inside the restraining sleeve (61); A fixing rod (65) is provided on the outer wall of the flange plate 1 (1) and the flange plate 2 (2), a pressure sensor (64) is provided at the end of the fixing rod (65), and a guide rod (63) is provided on the pressure sensor (64), and the two guide rods (63) are slidably inserted into the interior of the restraint sleeve (61).

10. A polytetrafluoroethylene compensator according to claim 9, characterized in that: A permanent magnet is provided at the end of the guide rod (63) close to the magnetic coil (62), and the magnetic coil (62) generates a magnetic force opposite to that of the permanent magnet on the guide rod (63) when energized; The plurality of magnetic coils (62) have the same specifications and are connected in series.

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