A leak-proof corrugated pipe

Abstract

This utility model relates to the field of pipelines and discloses a leak-proof corrugated pipe, including a corrugated pipe, a bushing, a connecting rod, a joint, a first sealing ring, and a first gasket. The bushing and connecting rod are welded to both ends of the corrugated pipe, respectively. The joint is fitted onto the bushing, and the first sealing ring is fitted onto the end of the bushing furthest from the corrugated pipe. The joint has a first limiting step and a second limiting step inside, with the first sealing ring abutting against the first limiting step. The first gasket is fitted onto the bushing, and a first limiting portion protrudes from the outer wall of the bushing. The first gasket abuts against the second limiting step and the first limiting portion axially. The cooperation between the first limiting step and the first sealing ring effectively prevents axial leakage of the transported medium, while the abutment between the first gasket and the second limiting step and the first limiting portion further restricts the relative displacement between the bushing and the joint, improving the overall structural stability. This design is suitable for high-pressure and high-vibration environments.

Description

Technical Field

[0001] This utility model relates to the field of pipeline technology, and more specifically, to a leak-proof corrugated pipe. Background Technology

[0002] In many industrial applications, especially in hydraulic systems, automotive braking systems, and high-pressure cleaning equipment, the safety and reliability requirements for water pipes are extremely high. Traditional water pipes are prone to leakage or bursting under high pressure, are not stable enough, and pose safety hazards. Utility Model Content

[0003] To address at least one of the aforementioned problems, this utility model first provides a leak-proof corrugated pipe, comprising a corrugated pipe, a bushing, a connecting rod, a connector, a first sealing ring, and a first gasket. The bushing and the connecting rod are welded to both ends of the corrugated pipe, respectively. The connector is sleeved on the bushing. The first sealing ring is sleeved on the end of the bushing away from the corrugated pipe. The connector has a first limiting step and a second limiting step inside. The first sealing ring abuts against the first limiting step. The first gasket is sleeved on the bushing. The outer wall of the bushing has a first limiting portion protruding. The first gasket abuts against the second limiting step and the first limiting portion in the axial direction.

[0004] Optionally, the first sealing ring includes a first sealing portion and a second sealing portion connected to each other, the first sealing portion abutting axially at the end of the bushing away from the bellows, and the second sealing portion being radially disposed between the bushing and the joint.

[0005] Optionally, it also includes a second sealing ring, wherein a first mounting groove is provided at the end of the bushing away from the bellows, the second sealing ring is sleeved in the first mounting groove, the second sealing ring is located between the first sealing ring and the first gasket, and the second sealing ring axially abuts against the second sealing part.

[0006] Optionally, it also includes a third sealing ring, wherein a second mounting groove is provided at the end of the bushing away from the bellows, the third sealing ring is sleeved in the second mounting groove, and the third sealing ring is located between the second sealing ring and the first gasket.

[0007] Optionally, it also includes a second washer, the bushing having a third mounting groove at one end near the bellows, the connector having a fourth mounting groove, and a mounting cavity being formed between the third mounting groove and the fourth mounting groove, the second washer being installed in the mounting cavity.

[0008] Optionally, it also includes a sheath, which is fitted onto the corrugated pipe, and one end of the bushing is provided with a connecting portion, on which the corrugated pipe is fitted.

[0009] Optionally, it further includes a first locking ring, which is sleeved on the sheath. The connecting portion is provided with a first connecting groove, and the first locking ring is radially aligned with the first connecting groove and welded to the sheath for fixation.

[0010] Optionally, it also includes a second locking ring, which is sleeved on the sheath. The connecting rod is provided with a second connecting groove, and the second locking ring is radially aligned with the second connecting groove and welded to the sheath for fixation.

[0011] Optionally, the sheath is made of woven stainless steel.

[0012] Optionally, the outer wall of the bushing is provided with a second limiting part, and one side of the second limiting part axially limits the bellows, the sheath and the first locking ring.

[0013] Compared to existing technologies, the leak-proof bellows of this invention significantly enhances the sealing performance and pressure resistance of the bellows connection through multi-stage limiting and sealing design. The cooperation between the first limiting step and the first sealing ring effectively prevents the transported medium from leaking axially, while the contact between the first gasket and the second limiting step and the first limiting part further restricts the relative displacement between the bushing and the joint, improving the stability of the overall structure and making it suitable for high-pressure and high-vibration scenarios. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the leak-proof bellows according to an embodiment of the present utility model;

[0015] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0016] Figure 3 for Figure 1 Enlarged view of section B;

[0017] Figure 4 This is a structural diagram of the leak-proof corrugated pipe according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Corrugated pipe; 2. Bushing; 21. First limiting part; 22. First mounting groove; 23. Second mounting groove; 24. Third mounting groove; 25. Connecting part; 26. First connecting groove; 27. Second limiting part; 3. Connecting rod; 31. Second connecting groove; 4. Joint; 41. First limiting step; 42. Second limiting step; 43. Fourth mounting groove; 44. Clamping part; 5. First sealing ring; 51. First sealing part; 52. Second sealing part; 6. First gasket; 7. Second sealing ring; 8. Third sealing ring; 9. Second gasket; 10. Sheath; 11. First locking ring; 12. Second locking ring. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] This utility model embodiment provides a leak-proof corrugated pipe, combined with Figures 1 to 4 As shown, the device includes a bellows 1, a bushing 2, a connecting rod 3, a connector 4, a first sealing ring 5, and a first washer 6. The bushing 2 and the connecting rod 3 are welded to both ends of the bellows 1, respectively. The connector 4 is fitted onto the bushing 2. The first sealing ring 5 is fitted onto the end of the bushing 2 away from the bellows 1. The connector 4 has a first limiting step 41 and a second limiting step 42 inside. The first sealing ring 5 abuts against the first limiting step 41. The first washer 6 is fitted onto the bushing 2. The outer wall of the bushing 2 has a protruding first limiting part 21. The first washer 6 abuts against the second limiting step 42 and the first limiting part 21 in the axial direction.

[0022] like Figure 2 As shown, in this embodiment, the sealing performance and pressure resistance of the bellows 1 connection are significantly enhanced through multi-level limiting and sealing design. The cooperation between the first limiting step 41 and the first sealing ring 5 can effectively prevent the conveyed medium from leaking along the axial direction, while the contact between the first gasket 6 and the second limiting step 42 and the first limiting part 21 further restricts the relative displacement between the bushing 2 and the joint 4, improving the stability of the overall structure and making it suitable for high-pressure and high-vibration scenarios.

[0023] The bellows 1, acting as a flexible main body, is fixedly connected to the bushing 2 and connecting rod 3 by welding, ensuring the robustness and sealing of the basic structure. The first limiting step 41 inside the connector 4 is used for precise positioning and axial compression of the first sealing ring 5, forming the main sealing surface; the second limiting step 42 cooperates with the first gasket 6, while the first limiting part 21 on the bushing 2 axially limits the first gasket 6 from the other side. In this way, the first gasket 6 is clamped between the second limiting step 42 and the first limiting part 21, forming a robust mechanical locking structure, further enhancing the sealing effect. The first sealing ring 5 provides a flexible static seal, while the mechanism composed of the first gasket 6 and the two limiting structures bears the mechanical load, preventing relative axial movement between the bushing 2 and the connector 4 due to system pressure fluctuations or vibrations. This protects the sealing ring from excessive compression or wear, greatly improving the sealing reliability and long-term service life of the entire connector 4 under dynamic operating conditions.

[0024] like Figure 2 As shown, optionally, the first sealing ring 5 includes a first sealing part 51 and a second sealing part 52 connected to each other. The first sealing part 51 abuts axially against the end of the bushing 2 away from the bellows 1, and the second sealing part 52 is radially disposed between the bushing 2 and the joint 4.

[0025] In this embodiment, the first sealing part 51 is responsible for axial sealing, blocking the path of leakage of the medium along the end face of the bushing 2; the second sealing part 52 is responsible for radial sealing, blocking the path of leakage of the medium along the mating gap between the bushing 2 and the connector 4. This dual axial and radial sealing design significantly improves sealing reliability, making it particularly suitable for complex stress environments. Even if the sealing capacity decreases in one direction (e.g., axial) due to slight deformation or wear, the sealing in the other direction (radial) remains effective, thus forming an extremely reliable double-insurance sealing mechanism, especially suitable for complex pipeline systems with frequent pressure pulsations or requiring the withstand of certain bending moments.

[0026] like Figure 2 As shown, optionally, the leak-proof bellows further includes a second sealing ring 7. The bushing 2 is provided with a first mounting groove 22 at one end away from the bellows 1. The second sealing ring 7 is sleeved in the first mounting groove 22. The second sealing ring 7 is located between the first sealing ring 5 and the first gasket 6. The second sealing ring 7 axially abuts against the second sealing part 52.

[0027] In this embodiment, the second sealing ring 7 further blocks the leakage path of the medium, maintaining an effective seal even under conditions of high pressure fluctuations or localized wear of the sealing ring. The second sealing ring 7, in conjunction with the first sealing ring 5, forms a multi-stage sealing cavity, significantly extending the potential sealing path and making it more difficult for the medium to leak to the outside. Secondly, it acts as a backup for the first sealing ring 5; even if the main sealing ring fails due to unforeseen circumstances, the second sealing ring 7 can still maintain sealing integrity for a short period, providing a valuable time window for system inspection and maintenance. This is crucial for transport systems involving hazardous media (such as flammable, toxic, or corrosive fluids), greatly enhancing system safety.

[0028] like Figure 2 As shown, optionally, the leak-proof bellows also includes a third sealing ring 8. The end of the bushing 2 away from the bellows 1 is provided with a second mounting groove 23. The third sealing ring 8 is sleeved in the second mounting groove 23. The third sealing ring 8 is located between the second sealing ring 7 and the first gasket 6.

[0029] In this embodiment, a third sealing ring is further introduced to form a triple sealing effect. The third sealing ring 8 is installed in a separate second mounting groove 23 and is located on the side of the second sealing ring 7 away from the first sealing ring 5, further improving the safety and stability of the sealing effect. The three sealing rings can be regarded as three continuous lines of defense, working together to cope with extreme operating conditions, such as abnormally high system pressure shocks, long-term aging of sealing ring materials, or extremely harsh chemical corrosion environments, maximizing the sealing integrity of the system under harsh conditions.

[0030] like Figure 2 As shown, optionally, the leak-proof corrugated pipe further includes a second washer 9, the bushing 2 is provided with a third mounting groove 24 at one end near the corrugated pipe 1, the connector 4 is provided with a fourth mounting groove 43, and a mounting cavity is formed between the third mounting groove 24 and the fourth mounting groove 43, and the second washer 9 is installed in the mounting cavity.

[0031] In this embodiment, a clamping part 44 is provided radially inward at the end of the connector 4 near the bellows 1. After the first sealing ring 5, the second sealing ring 7, the third sealing ring 8, the first washer 6, and the second washer 9 are installed, the external welding equipment clamp acts on the clamping part 44, clamping the clamping part 44 to fix the connector 4 and the bushing 2. The second washer 9 axially abuts against the clamping part 44 to lock the axial position between the bushing 2 and the connector 4. The second washer 9 provides additional support and buffer at the connection between the bellows 1 and the connector 4, reducing stress concentration caused by vibration or pressure changes and extending the service life of the area of ​​the connector 4.

[0032] like Figure 2 andFigure 4 As shown, optionally, the leak-proof corrugated pipe further includes a sheath 10, which is sleeved on the corrugated pipe 1. One end of the bushing 2 is provided with a connecting part 25, and the corrugated pipe 1 is sleeved on the connecting part 25.

[0033] In this embodiment, the connecting portion 25 on the bushing 2 provides a reliable mounting base for the bellows 1 and the sheath 10. The sheath 10 effectively protects the bellows 1, preventing external physical damage such as friction, impact, and compression, while also shielding the bellows 1 material from environmental factors such as ultraviolet radiation and ozone.

[0034] like Figure 1 and Figure 2 As shown, optionally, the leak-proof corrugated pipe further includes a first locking ring 11, which is sleeved on the sheath 10. The connecting part 25 is provided with a first connecting groove 26, and the first locking ring 11 is radially aligned with the first connecting groove 26 and welded and fixed to the sheath 10.

[0035] In this embodiment, the first connecting groove 26 provides a precise positioning reference for the locking ring. Reliable fixing is achieved by welding the first locking ring 11 to the sheath 10, ensuring that the end of the sheath 10 will not loosen. The radial alignment of the first connecting groove 26 allows the locking ring to be perfectly embedded and seated within the groove, forming a smooth transition and avoiding sharp protrusions. This not only improves aesthetics but, more importantly, prevents stress concentration and ensures the mechanical strength of the connection.

[0036] like Figure 1 and Figure 3 As shown, optionally, the anti-leakage corrugated pipe further includes a second locking ring 12, which is sleeved on the sheath 10. The connecting rod 3 is provided with a second connecting groove 31, and the second locking ring 12 is radially aligned with the second connecting groove 31 and welded and fixed to the sheath 10.

[0037] In this embodiment, the second locking ring 12 provides a corresponding locking effect at the end of the connecting rod 3, ensuring that the sheath 10 is evenly stressed along its entire length, avoiding stress concentration at the ends, and improving the overall structural balance and reliability. This achieves rigid fixation of both ends of the sheath 10 along its entire length, ensuring that the sheath 10 and the bellows 1 are always tightly fitted and deform together, preventing local bulging or twisting. This symmetrical fixing design ensures uniform force transmission and improves the structural consistency and durability of the entire assembly during repeated expansion, contraction, and bending.

[0038] like Figure 2 and Figure 4 As shown, optionally, the sheath 10 is made of woven stainless steel.

[0039] In this embodiment, stainless steel provides excellent mechanical strength, high temperature resistance, corrosion resistance, and wear resistance. The braided structure provides strong protection while giving the sheath 10 the necessary flexibility so as not to restrict the expansion and contraction of the bellows 1. This braided sheath 10 can also effectively resist torsion and has a certain tensile strength, partially replacing the bellows 1 in bearing tensile loads, further protecting the internal bellows 1.

[0040] like Figure 2 As shown, optionally, the outer wall of the bushing 2 is provided with a second limiting part 27, and one side of the second limiting part 27 axially limits the bellows 1, the sheath 10 and the first locking ring 11.

[0041] In this embodiment, the second limiting part 27 ensures that each component maintains a stable relative position under vibration or pressure changes by axially limiting the bellows 1, the sheath 10 and the second locking ring 12, preventing sealing failure or structural damage caused by movement.

[0042] Similarly, the components included in the "components," "mechanisms," and "devices" of this disclosure can also be flexibly combined. They can be modularly produced according to actual needs and assembled as an independent module; or they can be assembled separately to form a module in this device. The division of the above-mentioned components in this disclosure is only one embodiment for ease of reading and is not intended to limit the scope of protection of this disclosure. Any technical solution that includes the above-mentioned components and has the same function should be understood as an equivalent technical solution of this disclosure.

[0043] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0044] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0046] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] It should be noted that when a component is referred to as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A leak-proof corrugated pipe, characterized in that, The device includes a bellows (1), a bushing (2), a connecting rod (3), a connector (4), a first sealing ring (5), and a first gasket (6). The bushing (2) and the connecting rod (3) are welded to both ends of the bellows (1). The connector (4) is fitted onto the bushing (2). The first sealing ring (5) is fitted onto the end of the bushing (2) away from the bellows (1). The connector (4) has a first limiting step (41) and a second limiting step (42). The first sealing ring (5) abuts against the first limiting step (41). The first gasket (6) is fitted onto the bushing (2). The outer wall of the bushing (2) has a first limiting part (21) protruding. The first gasket (6) abuts against the second limiting step (42) and the first limiting part (21) in the axial direction.

2. The leak-proof corrugated pipe according to claim 1, characterized in that, The first sealing ring (5) includes a first sealing part (51) and a second sealing part (52) connected to each other. The first sealing part (51) abuts axially against the end of the bushing (2) away from the bellows (1), and the second sealing part (52) is radially disposed between the bushing (2) and the joint (4).

3. The leak-proof corrugated pipe according to claim 2, characterized in that, It also includes a second sealing ring (7), and the bushing (2) is provided with a first mounting groove (22) at one end away from the bellows (1). The second sealing ring (7) is sleeved in the first mounting groove (22). The second sealing ring (7) is located between the first sealing ring (5) and the first gasket (6). The second sealing ring (7) abuts against the second sealing part (52) axially.

4. The leak-proof corrugated pipe according to claim 3, characterized in that, It also includes a third sealing ring (8), and a second mounting groove (23) is provided at one end of the bushing (2) away from the bellows (1). The third sealing ring (8) is fitted in the second mounting groove (23) and is located between the second sealing ring (7) and the first gasket (6).

5. The leak-proof corrugated pipe according to claim 1, characterized in that, It also includes a second washer (9), the bushing (2) is provided with a third mounting groove (24) at one end near the bellows (1), the connector (4) is provided with a fourth mounting groove (43), a mounting cavity is formed between the third mounting groove (24) and the fourth mounting groove (43), and the second washer (9) is installed in the mounting cavity.

6. The leak-proof corrugated pipe according to claim 1, characterized in that, It also includes a sheath (10), which is fitted onto the corrugated pipe (1), and a connecting part (25) is provided at one end of the bushing (2), and the corrugated pipe (1) is fitted onto the connecting part (25).

7. The leak-proof corrugated pipe according to claim 6, characterized in that, It also includes a first locking ring (11), which is sleeved on the sheath (10). The connecting part (25) is provided with a first connecting groove (26). The first locking ring (11) is radially aligned with the first connecting groove (26) and welded to the sheath (10).

8. The leak-proof corrugated pipe according to claim 6, characterized in that, It also includes a second locking ring (12), which is sleeved on the sheath (10). The connecting rod (3) is provided with a second connecting groove (31). The second locking ring (12) is radially aligned with the second connecting groove (31) and welded to the sheath (10).

9. The leak-proof corrugated pipe according to claim 6, characterized in that, The sheath (10) is made of woven stainless steel.

10. The leak-proof corrugated pipe according to claim 7, characterized in that, The outer wall of the bushing (2) is provided with a second limiting part (27), and one side of the second limiting part (27) axially limits the bellows (1), the sheath (10) and the first locking ring (11).

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