A steel-lined PTFE expansion joint with stable adjustment

Abstract

The present invention relates to the technical field of the connection between a hose and a rigid element, and specifically to a steel-lined tetrafluoroethylene expansion joint with stable adjustment, which includes an expansion part that deforms axially. The steel-lined tetrafluoroethylene expansion joint further includes a guiding connection assembly arranged at both ends of the expansion part. The guiding connection assembly is used for the fixation of both ends of the expansion part and the connection with other components. When the expansion part is pressurized, the expansion part transmits part of the pressure to the inner guiding pipe and the annular insert. Through the deformation of the annular insert, the pressure on the expansion part is buffered, reducing the magnitude of the pressure on the expansion part. When the pressure in the system changes, the expansion joint will be subjected to pressure and produce telescopic deformation, etc. If the pressure is completely borne by the expansion joint itself, it may cause excessive deformation or even damage to it. Transmitting part of the pressure to the annular insert can reduce the pressure load on the expansion joint, enabling it to work within a reasonable deformation range and extending the service life of the expansion joint.

Description

Technical Field

[0001] The present invention relates to the technical field of the connection between a hose and a rigid element, and particularly to a steel-lined tetrafluoro expansion joint with stable adjustment. Background Art

[0002] The steel-lined tetrafluoro expansion joint is mainly for corrosion prevention and is mostly used for the compensation of pipeline systems in industries such as chemical industry, medicine, and food. It has an anti-corrosion effect. Through special processing methods, it has changed the characteristic that the previous pipelines could not be bent, and it can resist various concentrations of acids, alkalis, and salts. It can be used to connect pipelines made of materials with lower mechanical properties such as graphite, ceramic glass, and can be used as the feed and discharge pipes of tank trucks, storage tanks, containers, or reaction kettles. It can be used for misaligned pipeline connections or to balance pipeline displacements, dimensional changes caused by climate or other reasons, or to eliminate the vibrations of high-frequency machinery.

[0003] The steel-lined tetrafluoro expansion joint consists of an expansion part and a flange part. Generally speaking, its advantages are relatively prominent, but in some specific cases, there may also be some relative "drawbacks" or limitations. Without a connection structure, the expansion joint cannot effectively distribute and transfer the pressure load in the pipeline evenly. Under the action of pressure, local excessive deformation, rupture, etc. may occur in the expansion part, and the flange part may also fail to work in coordination with the expansion part, resulting in seal failure and unable to ensure the sealing performance and safety of the pipeline system. Summary of the Invention

[0004] The purpose of the present invention is to provide a steel-lined tetrafluoro expansion joint with stable adjustment to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A steel-lined tetrafluoro expansion joint with stable adjustment, including an expansion part that deforms axially, and the steel-lined tetrafluoro expansion joint further includes:

[0006] A guiding connection assembly, arranged at both ends of the expansion part, and the guiding connection assembly is used for the fixation of both ends of the expansion part and the connection with other components;

[0007] An installation assembly, arranged outside the guiding connection assembly, and the installation assembly provides a notch for the installation of the guiding connection assembly;

[0008] The expansion part is composed of an annular elastic member that deforms to adapt to expansion and a connecting pipe for connection;

[0009] The guiding connection assembly includes an inner guiding pipe located inside the connecting pipe for guiding.

[0010] Preferably, the guiding connection assembly further includes an annular embedding member located outside the inner guiding pipe, and a relief groove is provided on the annular embedding member;

[0011] The annular insert is connected to the corresponding position on the mounting assembly.

[0012] Preferably, the annular elastic member is composed of an inner elastic ring located on the inner side, an outer elastic ring located on the outer side, and an elastic support ring located inside the annular elastic member.

[0013] Preferably, the elastic support rings are distributed in an annular array centered on the axis of the annular elastic member inside the annular elastic member;

[0014] There are two states of the elastic support ring, namely the horizontal state and the vertical state, and the elastic support rings in the horizontal state and the vertical state are arranged at intervals.

[0015] Preferably, the mounting assembly further includes a flange assisted in installation by the annular insert;

[0016] A sealing ring installation groove is provided on the flange, a fixed plug for docking with another flange is arranged in the sealing ring installation groove, and a sealing ring for sealing is arranged in the sealing ring installation groove;

[0017] A fixing card slot for docking with the annular insert is provided on the flange.

[0018] Preferably, the thickness of the sealing ring is twice the depth of the sealing ring installation groove body;

[0019] The length of the fixed plug is three times the depth of the sealing ring installation groove body.

[0020] Preferably, an outer positioning ring for assisting in fixing the connecting pipe is arranged outside the inner guide pipe, and an inner annular card slot for sleeving outside the outer positioning ring is provided on the inner wall of the connecting pipe.

[0021] Preferably, a fixing assembly is further arranged outside the connecting pipe;

[0022] The fixing assembly includes a fixing band fixed at one end on the connecting pipe and wound around the connecting pipe, an end buckle for inserting the fixing band is fixed on the fixed end of the fixing band, a pulling handle for assisting in pulling is arranged on the movable end of the fixing band, and a locking member for pressing and fixing the fixing band is arranged on the end buckle.

[0023] Preferably, the fixing bands are arranged in groups, and a group of fixing bands is arranged on the upper and lower sides of the outer positioning ring;

[0024] A group of the fixing bands position and press from the upper and lower sides of the outer positioning ring.

[0025] Preferably, a reinforcement assembly for strengthening the fixation is arranged between the guiding connection assembly and the mounting assembly, and the reinforcement assembly includes connection rings located above and below the flange, and connecting rods are arranged between the connection rings for fixation;

[0026] The annular insert is provided with a groove corresponding to the connecting ring and a slot corresponding to the connecting rod.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. When the steel-lined PTFE expansion joint is in use, the expansion part is under pressure, and the expansion part transfers part of the pressure to the inner guide tube and the annular insert. The deformation of the annular insert buffers the pressure on the expansion part and reduces the pressure on the expansion part. When the pressure in the system changes, the expansion joint will be affected by the pressure and produce expansion and contraction deformation. If the pressure is completely borne by the expansion joint itself, it may cause excessive deformation or even damage. Transferring part of the pressure to the annular insert can reduce the pressure load of the expansion joint, so that it can work within a reasonable deformation range and extend the service life of the expansion joint. Long-term exposure to excessive pressure will cause fatigue of the expansion joint material and reduce material performance. By transferring part of the pressure to the annular insert, the number of stress cycles on the expansion joint material can be reduced, the risk of fatigue damage can be reduced, and the stable performance of the expansion joint can be ensured.

[0029] The annular insert transfers part of the pressure to the flange, which can make the force on the flange connection more uniform. Under the action of pressure, the sealing surfaces between the flange and the pipeline and the expansion joint can fit better, reducing the problem of sealing failure caused by excessive local pressure or uneven force, ensuring good sealing of the system and preventing medium leakage.

[0030] 2. The annular design of the annular elastic part provides greater reverse elastic force. At the same time, the elastic support ring inside the annular elastic part also exerts pressure on the annular elastic part. The expansion part is composed of multiple annular elastic parts with internal elastic support rings, which have the advantages of enhanced structural stability, improved corrosion resistance, and optimized compensation capacity. Multiple pipes with internal support structures work together to evenly disperse the external pressure and avoid excessive local pressure. The support structure can effectively bear part of the pressure, making the expansion joint more stable when bearing system pressure and reducing the possibility of deformation or damage due to excessive pressure. The expansion joint composed of multiple pipes with support structures can provide better support and constraint for the pipeline, limit the displacement and deformation of the pipeline, ensure the overall stability of the pipeline system, and prevent safety accidents caused by pipeline instability.

[0031] 3. The expansion part and the installation component are connected through a guiding connection component. The guiding connection component can firmly connect the expansion part and the installation component together, enabling the entire expansion joint to withstand the pressure in the pipeline system. Under high-pressure working conditions, the connection structure can evenly transmit the pressure, avoid stress concentration, and ensure that the expansion joint will not crack or loosen at the connection when bearing pressure, guaranteeing the safe operation of the pipeline system. Using the connection structure, the expansion part and the flange part of the expansion joint can be transported and installed separately, reducing the overall installation difficulty. During on-site installation, only the expansion part and the installation component need to be assembled through the guiding connection component, reducing the limitation of the installation space and improving the installation efficiency. At the same time, the standardized design of the guiding connection component also makes the installation process more standardized and simple, facilitating the operation of construction personnel. When the expansion part or the installation component of the expansion joint is damaged, the guiding connection component is convenient for separately disassembling and replacing the damaged part, without the need to replace the entire expansion joint, reducing the maintenance cost and workload. Maintenance personnel can disassemble the guiding connection component, repair or replace the damaged part, and then reconnect it, shortening the repair time and reducing the impact on the normal operation of the pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a front view structural schematic diagram of the present invention.

[0033] Figure 2 It is a top view structural schematic diagram of the present invention.

[0034] Figure 3 It is a side view structural schematic diagram of the present invention.

[0035] Figure 4 It is a structural schematic diagram at the corresponding position of the inner guiding pipe of the present invention.

[0036] Figure 5 It is a structural schematic diagram at the corresponding position of the fixing component of the present invention.

[0037] Figure 6 It is a structural schematic diagram at the corresponding position of the outer positioning ring of the present invention.

[0038] Figure 7 It is a structural schematic diagram at the corresponding position of the installation component of the present invention.

[0039] Figure 8 It is a structural schematic diagram at the corresponding position of the fixing plug of the present invention.

[0040] Figure 9 It is a structural schematic diagram at the corresponding position of the reinforcement component of the present invention.

[0041] Figure 10 It is a structural schematic diagram at the corresponding position of the inner guiding pipe of the present invention.

[0042] Figure 11 It is a schematic diagram of the structure at the corresponding position of the annular elastic member of the present invention.

[0043] Figure 12 It is a schematic diagram of the structure at the corresponding position of the inner annular groove of the present invention.

[0044] Figure 13 It is a schematic diagram of the structure at the corresponding position of the elastic support ring of the present invention.

[0045] In the figure: 1. expansion part; 11. annular elastic member; 111. inner elastic ring; 112. outer elastic ring; 113. elastic support ring; 12. connecting pipe; 121. inner annular groove; 2. guide connection assembly; 21. inner guide tube; 211. outer positioning ring; 22. annular insert; 23. clearance groove; 3. installation assembly; 31. flange; 32. sealing ring installation groove; 33. fixing column; 34. sealing ring; 35. fixing groove; 4. fixing assembly; 41. fixing belt; 42. end buckle; 43. handle; 44. locking member; 5. reinforcement assembly; 51. connecting ring; 52. connecting rod. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] The present invention provides a technical solution: a stable adjustable steel-lined polytetrafluoroethylene expansion joint, comprising an expansion portion 1 deformed along the axial direction, the expansion portion 1 is used to adapt to the required deformation, and the steel-lined polytetrafluoroethylene expansion joint also includes:

[0048] The guiding connection component 2 is arranged at both ends of the expansion part 1. The guiding connection component 2 is used for the fixation of both ends of the expansion part 1 and the connection with other components. A tubular structure corresponding to the expansion part 1 is arranged on the guiding connection component 2, and the tubular structure of the expansion part 1 is sleeved outside the corresponding tubular structure on the guiding connection component 2 to achieve the assembly method of split connection. The connection structure can transport and install the expansion part and the flange part of the expansion joint separately, reducing the difficulty of overall installation. During on-site installation, only the expansion part and the installation component need to be assembled through the guiding connection component, reducing the limitation of the installation space and improving the installation efficiency. At the same time, the standardized design of the guiding connection component also makes the installation process more standardized and simple, facilitating the operation of construction personnel. When the expansion part or the installation component of the expansion joint is damaged, the guiding connection component is convenient for separately disassembling and replacing the damaged part, without the need to replace the entire expansion joint, reducing the maintenance cost and workload. Maintenance personnel can disassemble the guiding connection component, repair or replace the damaged part, and then reconnect it, shortening the repair time and reducing the impact on the normal operation of the pipeline system;

[0049] The installation component 3 is arranged outside the guiding connection component 2. The installation component 3 provides a notch for the installation of the guiding connection component 2. Both the upper surface and the lower surface of the installation component 3 are provided with notches corresponding to the installation component 3 to assist in the installation of the annular insert 22, as Figure 1 , 2 , as shown in Figure 3;

[0050] The expansion part 1 is composed of an annular elastic member 11 that deforms to adapt to expansion and a connecting pipe 12 for connection. The annular elastic member 11 and the connecting pipe 12 form a part and structure that adapt to expansion to adapt to the occurrence of self-adaptive deformation;

[0051] The guiding connection component 2 includes an inner guiding pipe 21 for guiding located inside the connecting pipe 12. The connecting pipe 12 is located outside the inner guiding pipe 21 to achieve the installation of the connecting pipe 12 outside the inner guiding pipe 21. At the same time, such a design can realize the separate replacement of the annular elastic member 11 and the connecting pipe 12, reducing the replacement loss. At the same time, as Figure 4 shown;

[0052] The guiding connection component 2 further includes an annular insert 22 located outside the inner guiding pipe 21. A relief groove 23 is formed on the annular insert 22. Due to the existence of the relief groove 23, the annular insert 22 forms a structure composed of two rings of different sizes. The annular insert 22 is embedded in the corresponding fixing slot 35 on the installation component 3 to achieve the connection between the guiding connection component 2 and the installation component 3. The annular insert 22 is a deformable structure to ensure the installation of the annular insert 22;

[0053] The annular insert 22 is connected to a corresponding position on the mounting component 3. A fixing groove 35 corresponding to the annular insert 22 is provided on the mounting component 3 to realize the connection between the guiding connection component 2 and the mounting component 3. The annular insert 22 is made of an elastic polymer material, such as nitrile rubber, ethylene propylene rubber, silicone rubber, etc. Nitrile rubber has excellent oil resistance and is often used to manufacture connection rings for oil pipelines, oil seals, etc.; ethylene propylene rubber has good weather resistance, water resistance and electrical insulation.

[0054] The annular elastic member 11 is composed of an inner elastic ring 111 located inside, an outer elastic ring 112 located outside, and an elastic support ring 113 located inside the annular elastic member 11. The inner elastic ring 111 and the outer elastic ring 112 form a tubular structure. The tubular annular elastic member 11 has stronger strength. When the annular elastic member 11 is compressed, it is less likely to deform. At the same time, after the annular elastic member 11 deforms, it is easier to rebound, so as to improve the durability of the annular elastic member 11. The elastic support ring 113 is located inside the annular elastic member 11 to support the elastic support ring 113 and improve the strength of the annular elastic member 11. The annular elastic member 11 is manufactured by a mold. The inner elastic ring 111 and the outer elastic ring 112 are respectively manufactured by different molds and then assembled. The mold material is selected according to the production batch, precision requirements and material characteristics of the annular elastic member 11. For annular tube molds with large production batches and high precision requirements, high-quality mold steels, such as Cr12MoV, H13, etc., are often selected. These mold steels have good wear resistance, corrosion resistance and thermal stability, and can ensure that the mold maintains stable dimensional accuracy and surface quality during long-term use;

[0055] In order to improve the wear resistance, corrosion resistance and demolding performance of the mold, the mold needs to be surface-treated. Common surface treatment methods include nitriding treatment, hard chromium plating treatment, etc. Nitriding treatment can form a nitrided layer with high hardness and good wear resistance on the mold surface, improving the service life of the mold; hard chromium plating treatment can make the mold surface have good smoothness and demolding performance, facilitating product demolding.

[0056] The elastic support rings 113 are distributed in a circular array centered on the axis of the annular elastic member 11 inside the annular elastic member 11. The elastic support rings 113 are evenly distributed inside the annular elastic member 11 to realize the uniform compression of the annular elastic member 11 and ensure the strength of the annular elastic member 11;

[0057] The elastic support rings 113 have two states: horizontal state and vertical state, and the elastic support rings 113 in the horizontal state and the vertical state are arranged at intervals to support the annular elastic member 11 in the horizontal state and the vertical state, ensuring that the annular elastic member 11 can still remain stable when the annular elastic member 11 is subjected to pressures in different directions.

[0058] The installation component 3 further includes a flange 31 assisted by an annular insert 22. The flange 31 is used to ensure assembly with other rigid components and serves the function of a conventional flange. The flange 31 is an important component for connecting the expansion joint to a pipeline or equipment. The flange 31 firmly connects the expansion joint to the pipeline or equipment, making the entire system form a continuous whole, ensuring that the medium can be smoothly transmitted in the system. In cooperation with the sealing element of the expansion joint, the pressure generated by tightening the bolts on the flange 31 forms a good seal between the sealing surfaces, preventing medium leakage. It bears the pressure of the medium in the pipeline, the thermal stress caused by temperature changes, and the mechanical stress of the pipeline system, etc., and evenly transmits these forces to the pipeline or equipment, ensuring the stability and safety of the expansion joint and the entire system. The installation position of the flange 31 should be determined according to the design requirements of the pipeline system and the compensation direction of the expansion joint to ensure that the expansion joint can effectively compensate for the thermal displacement and other deformations of the pipeline;

[0059] A sealing ring installation groove 32 is provided on the flange 31, and a sealing ring 34 is installed in the sealing ring installation groove 32. A fixed plug 33 for docking with another flange 31 is provided in the sealing ring installation groove 32. A sealing ring 34 for sealing is provided in the sealing ring installation groove 32. The sealing ring 34 is used for docking between two flanges 31. Through the presence of the sealing ring 34, sealing between the two flanges 31 is achieved, preventing leakage of gas or liquid;

[0060] The flange 31 is provided with a fixing card slot 35 for docking with the annular insert 22. Refer to Figure 5 、 6 、7.

[0061] The thickness of the sealing ring 34 is twice the depth of the groove body of the sealing ring installation groove 32;

[0062] The length of the fixed plug 33 is three times the depth of the groove body of the sealing ring installation groove 32. By restricting the thicknesses of the sealing ring 34, the sealing ring installation groove 32, and the fixed plug 33, it is ensured that the fixed plug 33 can be inserted into the corresponding groove body on another flange 31. The subsequent restriction of the sealing ring 34 ensures that the sealing ring 34 can completely fill the sealing ring installation groove 32. The sealing ring 34 is mainly used to ensure the sealing performance and stability of the expansion joint during operation. The sealing ring 34 mainly relies on its own elastic deformation to compensate for the dimensional changes and displacements caused by factors such as temperature changes and mechanical vibrations of the pipeline or equipment. When the pipeline or equipment undergoes thermal expansion or contraction, the expansion joint sealing ring will correspondingly elongate or compress, thereby absorbing these displacements and maintaining the sealing performance and stability of the system. At the same time, the sealing ring 34 forms a sealing barrier through the pressure between the contact surfaces with the pipeline or equipment, preventing medium leakage.

[0063] An outer positioning ring 211 for fixing the auxiliary connecting pipe 12 is arranged outside the inner guiding pipe 21. An inner annular clamping groove 121 sleeving the outer positioning ring 211 is formed on the inner wall of the connecting pipe 12. Through the cooperation of the outer positioning ring 211 and the inner annular clamping groove 121, the fixing effect after the docking of the connecting pipe 12 and the inner guiding pipe 21 is realized, and the friction force at the connecting position of the connecting pipe 12 and the inner guiding pipe 21 is increased.

[0064] A fixing assembly 4 is further arranged outside the connecting pipe 12;

[0065] The fixing assembly 4 includes a fixing belt 41 fixed at one end on the connecting pipe 12 and wound around the connecting pipe 12. An end buckle 42 for inserting the fixing belt 41 is fixed on the fixed end of the fixing belt 41. A pulling handle 43 for auxiliary pulling is arranged on the movable end of the fixing belt 41. A locking member 44 for pressing and fixing the fixing belt 41 is arranged on the end buckle 42. By pressing the pulling handle 43, the fixing belt 41 is driven to tighten. After the fixing belt 41 is tightened, it passes through the end buckle 42, and the locking member 44 presses the fixing belt 41 to realize the fixing of the fixing belt 41. The fixing assembly 4 can be a soft steel locking buckle. Soft steel has a high elongation rate and impact toughness, which means that when the locking buckle is subjected to external force impact or stretching, it can deform to a certain extent without breaking, thus ensuring its reliability and safety during use. In this text, a circular snap-type locking buckle is used, which is simple and fast to operate and can quickly realize the locking and unlocking functions. The soft steel locking buckle has the advantages of low cost and high cost performance, and can save costs for users on the premise of meeting the use requirements; at the same time, its good toughness and workability enable the soft steel locking buckle to adapt to various complex use environments and installation requirements, and has high versatility and applicability.

[0066] The fixing belts 41 are arranged in groups, and a group of fixing belts 41 are arranged on the upper and lower sides of the outer positioning ring 211;

[0067] A group of the fixing belts 41 position and press from the upper and lower sides of the outer positioning ring 211. Through the pressing of the fixing belts 41, the fixing of the connecting position of the connecting pipe 12 and the inner guiding pipe 21 is realized. At the same time, the fixing belts 41 are located above and below the outer positioning ring 211, further improving the fixing effect of the connecting position of the connecting pipe 12 and the inner guiding pipe 21. Refer to Figure 5 。

[0068] A reinforcing assembly 5 for strengthening and fixing is arranged between the guiding connection assembly 2 and the installation assembly 3. The reinforcing assembly 5 includes connecting rings 51 located above and below the flange 31. A connecting rod 52 is arranged between the connecting rings 51 for fixing. The installation of the annular insert 22 is fixed through the structure composed of the connecting rings 51 and the connecting rod 52 to ensure the fixing of the annular insert 22 on the flange 31;

[0069] The annular insert 22 is provided with a groove corresponding to the connecting ring 51 and a slot corresponding to the connecting rod 52.

[0070] Working principle:

[0071] First step: Multiple sets of inner elastic rings 111 form an internal connection structure, and multiple sets of outer elastic rings 112 form an external connection structure. Multiple sets of elastic support rings 113 are installed inside the outer elastic rings 112. The outer elastic rings 112 and the inner elastic rings 111 are assembled together to form a complete annular elastic member 11. The connecting pipes 12 at the upper and lower ends of the annular elastic member 11 are sleeved on the inner guiding pipe 21, and the inner annular clamping grooves 121 in the connecting pipes 12 are sleeved outside the outer positioning ring 211, realizing the assembly of the expansion part 1 and the guiding connection assembly 2, and being fixed by the fixing component 4. The fixing belt 41 is wound outside the connecting pipe 12, passes through the end buckle 42, and is fixed by the locking member 44 to fix the connection position of the expansion part 1 and the guiding connection assembly 2.

[0072] Second step: The annular insert 22 is deformed and sleeved on the installation component 3. The installation component 3 is provided with a fixing clamping groove 35 corresponding to the annular insert 22. The annular insert 22 is clamped at the corresponding position on the fixing clamping groove 35 to realize the connection between the installation component 3 and the guiding connection assembly 2. After the two are connected, it is necessary to fix the connection position of the son. The connecting ring 51 is clamped at the corresponding position on the annular insert 22, and the two connecting rings 51 are fixed by the connecting rod 52 to strengthen the connection position of the installation component 3 and the guiding connection assembly 2.

[0073] Third step: When the flange 31 is butted, the sealing ring 34 is located in the sealing ring installation groove 32. By restricting the thicknesses of the sealing ring 34, the sealing ring installation groove 32, and the fixing plug 33, it is ensured that the fixing plug 33 can be inserted into the corresponding groove body on another flange 31, and the restriction after the sealing ring 34 ensures that the sealing ring 34 can completely fill the sealing ring installation groove 32.

[0074] Fourth step: When the steel-lined PTFE expansion joint is in use, the expansion part 1 is under pressure. When the expansion part 1 is under pressure, the expansion part 1 transfers part of the pressure to the inner guiding pipe 21, and the inner guiding pipe 21 transfers the pressure to the annular insert 22. The annular insert 22 is deformed under pressure. Through the deformation of the annular insert 22, the pressure on the expansion part 1 is buffered, reducing the magnitude of the pressure on the expansion part 1. When the expansion part 1 is under pressure, the annular elastic member 11 is deformed. The annular design of the annular elastic member 11 provides a greater reverse elastic force. At the same time, the elastic support rings 113 inside the annular elastic member 11 also exert pressure on the annular elastic member 11, increasing the reverse elastic force of the annular elastic member 11 under pressure.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A steel-lined PTFE expansion joint with stable adjustment, comprising an expansion part (1) that deforms axially, characterized in that: The steel-lined PTFE expansion joint further includes: A guiding and connecting component (2), arranged at both ends of the expansion part (1), and the guiding and connecting component (2) is used for fixing both ends of the expansion part (1) and connecting with other components; An installation component (3), arranged outside the guiding and connecting component (2), and the installation component (3) provides a notch for installing the guiding and connecting component (2); the installation component (3) further includes a flange (31) assisted by an annular embedding part (22) for installation; A sealing ring installation groove (32) is formed on the flange (31), a fixed plug (33) for docking with another flange (31) is arranged in the sealing ring installation groove (32), and a sealing ring (34) for sealing is arranged in the sealing ring installation groove (32); A fixing clamping groove (35) for docking with the annular embedding part (22) is formed on the flange (31), the thickness of the sealing ring (34) is twice the depth of the sealing ring installation groove body, and the length of the fixed plug (33) is three times the depth of the sealing ring installation groove (32); The expansion part (1) is composed of an annular elastic part (11) that deforms to adapt to expansion and a connecting pipe (12) for connection; The guiding and connecting component (2) includes an inner guiding pipe (21) for guiding inside the connecting pipe (12).

2. The expansion joint with steel lining and PTFE of stable adjustment according to claim 1, wherein: The guiding and connecting component (2) further includes an annular embedding part (22) outside the inner guiding pipe (21), and a relief groove (23) is formed on the annular embedding part (22); The annular embedding part (22) is connected to the corresponding position on the installation component (3).

3. The expansion joint with steel lining and PTFE which is stable in adjustment according to claim 2, wherein: The annular elastic part (11) is composed of an inner elastic ring (111) located inside, an outer elastic ring (112) located outside, and an elastic support ring (113) located inside the annular elastic part (11).

4. A steel-lined PTFE expansion joint with stable adjustment according to claim 3, characterized in that: The elastic support rings (113) are distributed in an annular array centered on the axis of the annular elastic part (11) inside the annular elastic part (11); There are two states of the elastic support ring (113), namely the horizontal state and the vertical state, and the elastic support rings (113) in the horizontal state and the vertical state are arranged at intervals.

5. The expansion joint with steel lining and PTFE of stable adjustment according to claim 4, wherein: An outer positioning ring (211) for assisting in fixing the connecting pipe (12) is arranged outside the inner guiding pipe (21), and an inner annular clamping groove (121) sleeving outside the outer positioning ring (211) is formed on the inner wall of the connecting pipe (12).

6. The adjustable and stable steel-lined PTFE expansion joint according to claim 5, wherein: A fixing component (4) is further arranged outside the connecting pipe (12); The fixing component (4) includes a fixing band (41) fixed at one end on the connecting pipe (12) and wound around the connecting pipe (12), an end buckle (42) for inserting the fixing band (41) is fixed on the fixed end of the fixing band (41), a pulling handle (43) for assisting in pulling is arranged on the movable end of the fixing band (41), and a locking part (44) for pressing and fixing the fixing band (41) is arranged on the end buckle (42).

7. A steel-lined PTFE expansion joint with stable adjustment according to claim 6, characterized in that: The fixing bands (41) are arranged in groups, and a group of fixing bands (41) is arranged on the upper and lower sides of the outer positioning ring (211); A group of the fixing bands (41) position and press from the upper and lower sides of the outer positioning ring (211).

8. The adjustable and stable steel-lined PTFE expansion joint according to claim 7, wherein: A reinforcement component (5) for strengthening fixation is provided between the guiding connection component (2) and the mounting component (3). The reinforcement component (5) includes connection rings (51) located above and below the flange (31), and connecting rods (52) are provided between the connection rings (51) for fixation; The annular insert (22) is provided with a groove corresponding to the connection ring (51) and a slot corresponding to the connecting rod (52).

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