A high-efficiency sealing pipe connection structure

Abstract

This application provides a high-efficiency sealing pipe connection structure, comprising a connection mechanism and a pipe assembly. The inner wall of the connection mechanism has a stepped flow guiding cavity, which includes a contraction section and an expansion section. The inner wall of the contraction section has a turbulence-inducing protrusion. It also includes a convex-shaped turbulent elastic sealing mechanism, whose inner wide sealing end face conforms to the outer wall of the pipe and is machined with spiral microgrooves. The inner wall of the connection mechanism has a flow guiding groove, one end of which connects to the expansion section, and the other end extends to the starting end of the spiral microgrooves. This relates to the field of fluid transport technology. The fluid is pressurized by the contraction section, and the turbulence-inducing protrusions create a rotating turbulent flow. Part of the turbulence is guided to the sealing mechanism through the flow guiding groove, using fluid pressure to enhance the sealing fit. Simultaneously, the fluid generates circumferential scouring along the spiral microgrooves, achieving self-cleaning of the sealing surface. This invention has a compact structure, reliable sealing, and self-cleaning capability, and is suitable for rapid pipe connections in high-pressure, impurity-containing fluid environments.

Description

Technical Field

[0001] This invention relates to the field of fluid transport technology, and in particular to a highly efficient sealed pipe connection structure. Background Technology

[0002] Pipeline connections are a fundamental component of fluid transport systems, and their sealing performance and loading / unloading efficiency directly affect the system's operational safety and maintenance costs. Currently, common pipeline connection methods include flange connections, threaded connections, and clamp connections.

[0003] While flange connections offer reliable sealing, they suffer from a large number of bolts, requiring time and effort for installation and removal. Uneven bolt preload can also lead to seal failure. Traditional threaded connections, though relatively easy to install and remove, are prone to loosening under vibration and require precise control of the sealing surface pressure. Clamp-type quick-connect structures allow for rapid assembly and disassembly, but under high pressure or with fluids containing impurities, the seals are susceptible to wear or impurity buildup, resulting in decreased sealing performance.

[0004] In existing technologies, improvements to sealing structures often focus on optimizing material selection or mechanical pre-tightening methods. For example, increasing the interference fit of the sealing ring can improve sealing performance. However, this increases assembly difficulty and fails to address the potential leakage caused by impurities intruding into the sealing surface. Furthermore, while some technical solutions introduce the concept of fluid pressure-assisted sealing, they typically require complex one-way valves or drainage structures to remove impurities, increasing system complexity and cost.

[0005] Therefore, how to simultaneously achieve efficient sealing, self-cleaning, and rapid loading and unloading functions for pipeline connections without adding additional auxiliary structures is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] To overcome existing problems, this application provides a high-efficiency sealing pipe connection structure, which aims to solve the technical problem that existing pipe connection structures cannot simultaneously achieve sealing performance, self-cleaning, and ease of installation and removal, thereby overcoming various technical defects in the existing technology and meeting the high-performance requirements of modern industry for pipe connection systems.

[0007] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0008] A high-efficiency sealing pipe connection structure includes a connection mechanism and a pipe assembly. The inner wall of the connection mechanism is provided with a stepped flow guiding cavity. The stepped flow guiding cavity includes a contraction section and an expansion section in sequence along the fluid flow direction. The inner wall of the contraction section is embedded with multiple flow-turbating protrusions. The extension direction of the flow-turbating protrusions forms a preset angle with the fluid flow direction.

[0009] It also includes a perturbation elastic sealing mechanism, the cross-section of which is convex, the inner side of which is a wide sealing end face for fitting the outer wall of the pipe assembly, and an annular gap is formed between the outer side of which and the inner wall of the connecting mechanism. Multiple spiral microgrooves are machined on the wide sealing end face.

[0010] The inner wall of the connecting mechanism is provided with a plurality of guide grooves corresponding to the inner position of the disturbance elastic sealing mechanism. One end of the guide groove is connected to the expansion section, and the other end extends to the starting end of the spiral microgroove.

[0011] Preferably, the connecting mechanism is a hollow structure. When the fluid enters the stepped guide cavity, it is initially pressurized by the contraction section and forms a rotating turbulent flow through the turbulent ridges. Part of the rotating turbulent flow is guided to the disturbance elastic sealing mechanism through the guide groove. The fluid pressure pushes the disturbance elastic sealing mechanism towards the pipe assembly to enhance the tightness of the wide sealing end face. The fluid entering the spiral microgroove generates a circumferential scouring flow along the spiral microgroove with the rotational kinetic energy of the fluid, carrying impurities on the wide sealing end face into the outer annular gap, and finally discharged with the main fluid.

[0012] Preferably, the stepped flow guide cavity further includes a transition section located between the contraction section and the expansion section, and the inner wall of the transition section is a circular arc transition structure.

[0013] Preferably, the connecting mechanism has an inlet end and a connecting end at both ends, and the outer wall of the connecting end is provided with a fixing ring for limiting the disturbance of the elastic sealing mechanism.

[0014] Preferably, the outer wall of the connecting mechanism is provided with a threaded sleeve at one end of the pipe assembly, and a ring is provided at the intersection of the threaded sleeve and the connecting mechanism, the ring being slidable on the outer wall of the connecting mechanism;

[0015] The threaded sleeve has internal threads.

[0016] Preferably, the pipe assembly includes an external pipe and a connecting pipe, the connecting pipe having a sealing ring inside, and a limiting groove being formed at the position of the sealing ring and the inner wall of the connecting pipe for positioning in conjunction with the disturbance elastic sealing mechanism;

[0017] The outer wall of the connecting pipe is provided with a threaded groove for connecting with the threaded sleeve.

[0018] Preferably, the size of the connecting end is larger than the size of the disturbance elastic sealing mechanism.

[0019] Preferably, the connecting mechanism has a limiting ring on the outer wall of the inlet end to limit the position of the threaded sleeve.

[0020] Preferably, the size of the limiting groove is the same as the wall thickness of the connecting mechanism, and the limiting groove engages with the connecting mechanism when the pipe assembly is inserted into the inlet end.

[0021] Preferably, the disturbance elastic sealing mechanism has a narrow sealing end face at one end of the wide sealing end face, and the interior of the wide sealing end face and the narrow sealing end face are provided with an oblique angle to reduce the force of the impurity fluid after the buffer brush on the disturbance elastic sealing mechanism.

[0022] The advantages of the embodiments of this application are:

[0023] The inner wall of the connecting mechanism is equipped with a stepped flow guide cavity that first contracts and then expands. The contraction section and the expansion section are connected by an arc transition section. Several turbulent ridges are embedded in the inner wall of the contraction section. The extension direction of the turbulent ridges is at an angle to the fluid flow direction. When the fluid passes through, the contraction section is initially pressurized, and the turbulent ridges break the central laminar flow zone, so that the fluid forms a slightly rotating turbulent state. The expansion section buffers the pressure by increasing the volume, and the transition section avoids vortex dead zones, providing stable fluid kinetic energy and flow state for subsequent functions.

[0024] Meanwhile, a disturbance elastic sealing mechanism is provided at the tail of the expansion section. The overall structure is annular with a convex cross-section. Multiple spiral micro-grooves are machined on the wide sealing end face of the disturbance elastic sealing mechanism. Multiple axial flow guide grooves are provided on the inner wall of the connecting mechanism. One end is connected to the expansion section of the flow guide cavity, and the other end extends to the starting end of the spiral micro-grooves on the wide sealing end face. The rotating turbulent fluid processed by the flow guide cavity flows to the wide sealing end face through the flow guide grooves. The fluid pressure pushes the disturbance elastic sealing mechanism to squeeze towards the pipeline, enhancing the tightness of the fit and improving the sealing performance.

[0025] After the fluid enters the spiral microgroove, it flows along the spiral microgroove with the rotational kinetic energy, forming a circumferential scouring flow. This flow discharges impurities that disturb the inner wall of the elastic sealing mechanism along with the main fluid, achieving self-cleaning without the need for additional recycling and sewage discharge structures. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the overall assembly structure of the high-efficiency sealing pipe connection structure of the present invention;

[0028] Figure 2 This is an exploded structural diagram of the high-efficiency sealing pipe connection structure of the present invention;

[0029] Figure 3This is a cross-sectional view of the connection mechanism in the high-efficiency sealing pipe connection structure of the present invention;

[0030] Figure 4 This is a cross-sectional view of the disturbance removal elastic sealing mechanism inside the connection mechanism of the high-efficiency sealing pipe connection structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the overall structure of the threaded sleeve in the high-efficiency sealing pipe connection structure of the present invention;

[0032] Figure 6 This is a schematic diagram of the overall structure of the pipe assembly in the high-efficiency sealing pipe connection structure of the present invention;

[0033] Figure 7 This is a schematic diagram of the overall structure of the pipe assembly in the high-efficiency sealing pipe connection structure of the present invention (half-section).

[0034] Figure 8 This is a cross-sectional view of the pipe assembly in the high-efficiency sealing pipe connection structure of the present invention;

[0035] Figure 9 This is a cross-sectional schematic diagram of the disturbance elastic sealing mechanism in the high-efficiency sealing pipe connection structure of the present invention.

[0036] Explanation of key figure labels:

[0037] 1. Connecting mechanism; 2. Limiting ring; 3. Threaded sleeve; 4. Pipe assembly; 41. External pipe; 42. Connecting pipe; 43. Sealing ring; 44. Threaded groove; 45. Limiting groove; 5. Contraction section; 6. Expansion section; 7. Transition section; 8. Turbulence protrusion; 9. Fixing ring; 10. Guide groove; 11. Disturbance elastic sealing mechanism; 111. Wide sealing end face; 112. Narrow sealing end face; 113. Angled; 12. Spiral microgroove; 13. Inlet end; 14. Connecting end; 15. Circular ring. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. In addition, for the sake of convenience, the terms "upper," "lower," "left," and "right" are equivalent to the upper, lower, left, and right directions of the accompanying drawings themselves, and the terms "first," "second," etc., are used for descriptive purposes and have no other special meaning.

[0039] This application provides a highly efficient, sealed pipe connection structure to solve the problems in the prior art. The inner wall of the connection mechanism is provided with a stepped flow guide cavity that first contracts and then expands. The contraction section and the expansion section are connected by an arc transition section. Several turbulent ridges are embedded in the inner wall of the contraction section. The extension direction of the turbulent ridges is at an angle to the fluid flow direction. When the fluid passes through, the contraction section is initially pressurized, and the turbulent ridges break the central laminar flow zone, causing the fluid to form a slightly rotating turbulent state. The expansion section buffers the pressure by increasing the volume, and the transition section avoids vortex dead zones, providing stable fluid kinetic energy and flow state for subsequent functions.

[0040] Meanwhile, a disturbance elastic sealing mechanism is provided at the tail of the expansion section. The overall structure is annular with a convex cross-section. Multiple spiral micro-grooves are machined on the wide sealing end face of the disturbance elastic sealing mechanism. Multiple axial flow guide grooves are provided on the inner wall of the connecting mechanism. One end is connected to the expansion section of the flow guide cavity, and the other end extends to the starting end of the spiral micro-grooves on the wide sealing end face. The rotating turbulent fluid processed by the flow guide cavity flows to the wide sealing end face through the flow guide grooves. The fluid pressure pushes the disturbance elastic sealing mechanism to squeeze towards the pipeline, enhancing the tightness of the fit and improving the sealing performance.

[0041] After the fluid enters the spiral microgroove, it flows along the spiral microgroove with the rotational kinetic energy, forming a circumferential scouring flow. This flow discharges impurities that disturb the inner wall of the elastic sealing mechanism along with the main fluid, achieving self-cleaning without the need for additional recycling and sewage discharge structures.

[0042] The technical solution in this application is to solve the above problems, and the overall approach is as follows:

[0043] Example

[0044] This embodiment provides a specific structure for a high-efficiency sealing pipe connection structure, such as... Figure 1-9 As shown, it includes a connecting mechanism 1 and a pipe assembly 4. The inner wall of the connecting mechanism 1 is provided with a stepped flow guide cavity. The stepped flow guide cavity includes a contraction section 5 and an expansion section 6 in sequence along the fluid flow direction. The inner wall of the contraction section 5 is embedded with a plurality of turbulence protrusions 8. The extension direction of the turbulence protrusions 8 forms a preset angle with the fluid flow direction. The stepped flow guide cavity also includes a transition section 7 located between the contraction section 5 and the expansion section 6. The inner wall of the transition section 7 is a circular arc transition structure.

[0045] The connecting mechanism 1 is a hollow structure with a stepped flow guide cavity on its inner wall. The flow guide cavity includes a contraction section 5 and an expansion section 6 along the fluid flow direction. Preferably, a transition section 7 with an arc transition structure on the inner wall is provided between the contraction section 5 and the expansion section 6. Multiple turbulence protrusions 8 are embedded on the inner wall of the contraction section 5. The extension direction of these turbulence protrusions 8 is at a preset angle with the fluid flow direction. Through the acceleration of the contraction section 5 and the guidance of the turbulence protrusions 8, the linear kinetic energy of the ordinary fluid is converted into rotational kinetic energy, forming a high-speed rotating turbulent flow. This not only enhances the flushing effect of the fluid on the pipe wall to prevent deposition, but also provides a power source for the subsequent self-sealing and self-cleaning functions. The arc design of the transition section 7 reduces eddy current loss and lowers the flow resistance. The flow guide groove 10 accurately guides the pressurized fluid in the expansion section 6 to the back side of the sealing mechanism, using the pressure of the fluid itself, rather than simply the mechanical pre-tightening force, to dynamically enhance the fit of the wide sealing end face 111. It achieves an adaptive sealing effect where the higher the pressure, the tighter the seal, thus solving the problem of leakage that traditional seals are prone to under pressure fluctuations.

[0046] It also includes a disturbance elastic sealing mechanism 11, the cross-section of which is convex, the inner side of which is a wide sealing end face 111 for fitting the outer wall of the pipe assembly 4, and an annular gap is formed between the outer side of the disturbance elastic sealing mechanism 11 and the inner wall of the connecting mechanism 1. Multiple spiral microgrooves 12 are machined on the wide sealing end face 111.

[0047] The inner wall of the connecting mechanism 1 is provided with a plurality of guide grooves 10 corresponding to the inner side of the disturbance elastic sealing mechanism 11. One end of the guide groove 10 is connected to the expansion section 6, and the other end extends to the starting end of the spiral microgroove 12.

[0048] The connecting mechanism 1 is a hollow structure. When the fluid enters the stepped guide cavity, it is initially pressurized by the contraction section 5 and forms a rotating turbulent flow through the turbulent ridge 8. Part of the rotating turbulent flow is guided to the disturbance elastic sealing mechanism 11 through the guide groove 10. The fluid pressure pushes the disturbance elastic sealing mechanism 11 towards the pipe assembly 4 to enhance the tightness of the wide sealing end face 111. The fluid entering the spiral microgroove 12 generates a circumferential scouring flow along the spiral microgroove 12 with the rotational kinetic energy of the fluid, which carries the impurities on the wide sealing end face 111 into the outer annular gap and is finally discharged with the main fluid.

[0049] High-pressure fluid enters the stepped guide cavity from inlet 13. First, the fluid is initially pressurized and accelerated in the contraction section 5. When it flows through the turbulent ridge 8, the fluid generates strong swirling turbulence due to the guiding effect of the ridge. Subsequently, the fluid enters the expansion section 6, where the flow velocity decreases and the static pressure recovers.

[0050] During this process, a portion of the rotating turbulent flow is introduced into the guide channel 10, which is connected to the expansion section 6, and is precisely guided to the back side of the disturbance elastic sealing mechanism 11 (i.e., the side of the narrow sealing end face 112). Utilizing the dynamic pressure formed by the fluid here, the entire disturbance elastic sealing mechanism 11 is pushed radially towards the pipe assembly 4, thereby automatically increasing the tightness of the fit between the wide sealing end face 111 and the outer wall of the connecting pipe 42 as the fluid pressure increases, achieving pressure-adaptive sealing and effectively preventing high-pressure leakage.

[0051] Simultaneously, another portion of the fluid carrying rotational kinetic energy enters the spiral microgrooves 12 on the wide sealing end face 111. Since the spiral direction of the microgrooves 12 matches the direction of fluid rotation, the fluid generates a high-speed circumferential scouring flow along the grooves. This scouring flow forms a dynamic cleaning layer on the sealing contact surface, continuously entraining and carrying away any tiny particles and impurities that may have deposited on the wide sealing end face 111. The fluid carrying impurities is then pushed into the outer annular gap, eventually merging into the main channel and being discharged along with the fluid.

[0052] The connecting mechanism 1 has an inlet end 13 and a connecting end 14 at both ends. The size of the connecting end 14 is larger than the size of the disturbance elastic sealing mechanism 11. The outer wall of the connecting end 14 is provided with a fixing ring 9, which is used to limit the disturbance elastic sealing mechanism 11.

[0053] A threaded sleeve 3 is provided on one end of the outer wall of the connecting mechanism 1 at the pipe assembly 4. A ring 15 is provided at the intersection of the threaded sleeve 3 and the connecting mechanism 1. The ring 15 can slide on the outer wall of the connecting mechanism 1.

[0054] The threaded sleeve 3 has internal threads.

[0055] Pipe assembly 4 includes an external pipe 41 and a connecting pipe 42. The connecting pipe 42 is provided with a sealing ring 43 inside. A limit groove 45 is provided at the position of the sealing ring 43 and the inner wall of the connecting pipe 42 for positioning in conjunction with the disturbance elastic sealing mechanism 11.

[0056] The outer wall of the connecting pipe 42 is provided with a threaded groove 44 for connecting with the threaded sleeve 3.

[0057] The connecting mechanism 1 has a limiting ring 2 on the outer wall of the inlet end 13 to limit the position of the threaded sleeve 3.

[0058] Furthermore, to achieve rapid locking and positioning, the outer wall of the inlet end 13 of the connecting mechanism 1 is provided with a limiting ring 2, and the outer wall of the connecting end 14 is provided with a fixing ring 9. The pipe assembly 4 includes an external pipe 41 and a connecting pipe 42. The outer wall of the connecting pipe 42 is provided with a threaded groove 44, and the interior is provided with a sealing ring 43 and a limiting groove 45 that cooperates with it. A threaded sleeve 3 is fitted on the outer wall of the connecting mechanism 1. At the intersection of the threaded sleeve 3 and the connecting mechanism 1, there is a ring 15 that can slide on the outer wall of the connecting mechanism 1. During connection, the pipe assembly 4 is inserted into the connecting end 14, so that the limiting groove 45 engages with the wall thickness of the connecting mechanism 1 for positioning. Then, the threaded sleeve 3 is screwed on so that its internal thread engages with the threaded groove 44 on the connecting pipe 42 until the threaded sleeve 3 is tightly connected, completing the installation. At this time, the fixing ring 9 of the connecting end 14 axially limits the disturbance elastic sealing mechanism 11 to a predetermined position, and the wide sealing end face 111 is tightly attached to the outer wall of the connecting pipe 42.

[0059] Furthermore, the limiting ring 2 restricts the stroke of the threaded sleeve 3 to prevent excessive tightening, and the fixing ring 9 axially limits the disturbance elastic sealing mechanism 11 to ensure its accurate initial installation position; the locking groove 45 and the connecting mechanism 1 engage to provide initial installation guidance and anti-dislodgement function. The overall structure makes the installation process free of special tools and ensures that the sealing element is always in the optimal working position.

[0060] The size of the limiting groove 45 is the same as the wall thickness of the connecting mechanism 1. When the pipe assembly 4 is inserted into the inlet end 13, the limiting groove 45 is engaged with the connecting mechanism 1.

[0061] The disturbance elastic sealing mechanism 11 has a narrow sealing end face 112 at one end of the wide sealing end face 111. The wide sealing end face 111 and the narrow sealing end face 112 have an oblique angle 113 inside, which is used to reduce the force of impurity fluid after the buffer brush and the disturbance elastic sealing mechanism 11.

[0062] An angle 113 is provided at the connection between the wide sealing end face 111 and the narrow sealing end face 112. When the impurity fluid after being flushed flows back with the annular gap, the angle 113 can play the role of guiding and buffering, reducing the direct impact of high-speed impurity fluid on the root of the sealing mechanism, and extending the service life of the disturbance elastic sealing mechanism 11.

[0063] Working principle:

[0064] When the fluid enters the connecting mechanism 1 from the inlet end 13, it first encounters the contraction section 5. Due to the sudden decrease in the flow cross-sectional area, the fluid is initially pressurized and accelerated. Then, the high-speed fluid impacts the turbulence protrusions 8 embedded in the inner wall.

[0065] Because the extension direction of the turbulent ridge 8 forms a preset angle with the fluid flow direction, it acts like a turbine blade, forcibly changing the fluid direction. This transforms the original straight-line flow of the fluid into a high-speed rotating turbulent state. At this point, the fluid not only possesses forward kinetic energy but also strong rotational kinetic energy, reserving power for subsequent actions.

[0066] After the turbulent rotation is generated, some of the fluid will flow along the pipeline to the expansion section 6. According to Bernoulli's principle of fluid flow, as the flow velocity decreases, the static pressure will recover and increase. This portion of fluid with higher static pressure will be precisely guided to the rear side of the disturbance elastic sealing mechanism 11 through the specially opened guide channel 10.

[0067] Because the cross-section of the perturbation elastic sealing mechanism 11 is convex, and there is an annular gap between its outer side and the inner wall of the connecting mechanism 1, a unidirectional pressure piston structure is formed. The fluid pressure pushes the sealing mechanism towards the pipe assembly 4, so that the fit between the wide sealing end face 111 and the outer wall of the pipe becomes tighter and tighter as the pressure increases, realizing dynamic adaptive sealing and effectively preventing high-pressure leakage.

[0068] While the wide sealing end face 111 forms a seal against the outer wall of the pipe, another part of the rotating turbulent flow enters the spiral microgrooves 12 machined on the end face. The spiral direction of the spiral microgrooves 12 matches the direction of fluid rotation, forming a miniature threaded pump channel.

[0069] Rotating fluid generates a high-speed circumferential scouring flow along the spiral microgrooves 12, continuously cleaning the sealing contact surface. This picks up and carries away tiny particles and impurities introduced during installation or deposited on the sealing surface over long-term operation. The fluid carrying impurities is pushed into the outer annular gap and finally discharged into the main channel through the expansion section 6, achieving online self-cleaning.

[0070] During installation, mechanical locking is achieved by screwing the threaded sleeve 3 into the threaded groove 44 on the connecting pipe 42. During this process, the retaining ring 9 ensures that the elastic sealing mechanism 11 is always in the preset optimal compression position, preventing seal failure due to over-positioning.

[0071] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A high-efficiency sealing pipe connection structure, characterized in that, It includes a connecting mechanism (1) and a pipe assembly (4). The inner wall of the connecting mechanism (1) is provided with a stepped flow guide cavity. The stepped flow guide cavity includes a contraction section (5) and an expansion section (6) in sequence along the fluid flow direction. The inner wall of the contraction section (5) is embedded with a plurality of turbulence protrusions (8). The extension direction of the turbulence protrusions (8) is at a preset angle with the fluid flow direction. It also includes a disturbance elastic sealing mechanism (11), the cross-section of which is convex, the inner side of which is a wide sealing end face (111) for fitting the outer wall of the pipe assembly (4), the outer side of which forms an annular gap with the inner wall of the connecting mechanism (1), and multiple spiral microgrooves (12) are machined on the wide sealing end face (111). The inner wall of the connecting mechanism (1) is provided with a plurality of guide grooves (10) corresponding to the inner side of the disturbance elastic sealing mechanism (11). One end of the guide groove (10) is connected to the expansion section (6), and the other end extends to the starting end of the spiral microgroove (12).

2. The high-efficiency sealing pipe connection structure according to claim 1, characterized in that: The connecting mechanism (1) is a hollow structure. When the fluid enters the stepped guide cavity, it is initially pressurized by the contraction section (5) and forms a rotating turbulent flow through the turbulent ridge (8). Part of the rotating turbulent flow is guided to the disturbance elastic sealing mechanism (11) through the guide groove (10). The fluid pressure pushes the disturbance elastic sealing mechanism (11) towards the pipe assembly (4) to enhance the tightness of the fit of the wide sealing end face (111). The fluid entering the spiral micro-groove (12) generates a circumferential scouring flow along the spiral micro-groove (12) with the rotational kinetic energy of the fluid, which carries the impurities on the wide sealing end face (111) into the outer annular gap and is finally discharged with the main fluid.

3. The high-efficiency sealing pipe connection structure according to claim 1, characterized in that: The stepped flow guide cavity also includes a transition section (7) located between the contraction section (5) and the expansion section (6), and the inner wall of the transition section (7) is a circular arc transition structure.

4. The high-efficiency sealing pipe connection structure according to claim 1, characterized in that: The connecting mechanism (1) has an inlet end (13) and a connecting end (14) at both ends. The outer wall of the connecting end (14) is provided with a fixing ring (9) for limiting the disturbance of the elastic sealing mechanism (11).

5. The high-efficiency sealing pipe connection structure according to claim 4, characterized in that: The outer wall of the connecting mechanism (1) is provided with a threaded sleeve (3) at one end of the pipe assembly (4), and a ring (15) is provided at the intersection of the threaded sleeve (3) and the connecting mechanism (1). The ring (15) can slide on the outer wall of the connecting mechanism (1). The threaded sleeve (3) has internal threads.

6. The high-efficiency sealing pipe connection structure according to claim 5, characterized in that: The pipe assembly (4) includes an external pipe (41) and a connecting pipe (42). The connecting pipe (42) is provided with a sealing ring (43). A limit groove (45) is provided at the position of the sealing ring (43) and the inner wall of the connecting pipe (42) for positioning in conjunction with the disturbance elastic sealing mechanism (11). The outer wall of the connecting pipe (42) is provided with a threaded groove (44) for connecting with the threaded sleeve (3).

7. The high-efficiency sealing pipe connection structure according to claim 6, characterized in that: The size of the connecting end (14) is larger than the size of the disturbance elastic sealing mechanism (11).

8. The high-efficiency sealing pipe connection structure according to claim 7, characterized in that: The connecting mechanism (1) has a limiting ring (2) on the outer wall of the inlet end (13) to limit the position of the threaded sleeve (3).

9. The high-efficiency sealing pipe connection structure according to claim 8, characterized in that: The size of the limiting slot (45) is the same as the wall thickness of the connecting mechanism (1). When the pipe assembly (4) is inserted into the inlet end (13), the limiting slot (45) engages with the connecting mechanism (1).

10. The high-efficiency sealing pipe connection structure according to claim 1, characterized in that: The disturbance elastic sealing mechanism (11) has a narrow sealing end face (112) at one end of the wide sealing end face (111). The wide sealing end face (111) and the narrow sealing end face (112) have an oblique angle (113) inside, which is used to reduce the force of the impurity fluid after the buffer brush and the disturbance elastic sealing mechanism (11).

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