Sealing corrugated pipe

Abstract

The utility model discloses a sealing corrugated pipe, and relates to the field of pipeline structures, the sealing corrugated pipe comprises a pipe body and a sleeve, and a channel is arranged in the pipe body; the sealing corrugated pipe comprises a pipe body and a casing pipe, the casing pipe is arranged outside the pipe body in a sleeving mode, corrugations are arranged on the periphery of the casing pipe, the corrugations are sleeved with a plurality of external members, the external members are embedded in the corrugations, and the sealing performance of connection between the sealing corrugated pipe can be improved through mutual matching of the casing pipe and the external members.

Description

Technical Field

[0001] This utility model relates to the field of pipe structure, and in particular to a sealed corrugated pipe. Background Technology

[0002] Corrugated pipes, as flexible connecting elements, are widely used in petrochemical, automotive manufacturing, and HVAC industries due to their excellent extensibility and pressure resistance. Traditional corrugated pipes typically use a single or multiple layer of metal pipe body with an annular corrugated structure to achieve axial compensation. However, under complex working conditions, the following technical challenges exist: First, the corrugated structure is prone to fatigue cracks under long-term alternating stress, leading to seal failure. Second, existing corrugated pipes often incorporate reinforcing rings within the corrugated grooves to enhance structural strength, but these integral reinforcing rings reduce the pipe's flexibility, and partial damage requires complete replacement. Third, the conventional sleeve-type protective components often have a simple interference fit with the corrugated grooves, which is prone to axial movement under vibration conditions, leading to wear at the sealing interface.

[0003] In recent years, improved solutions have emerged in the industry, such as the use of segmented collar structures for bellows protection devices. However, this structure still suffers from problems like poor positioning accuracy between the collar and the bellows groove, and uneven stress distribution. Particularly when the bellows undergoes three-dimensional deformation, the edges of the collar can easily interfere with adjacent corrugations, exacerbating wear on the bellows structure. Furthermore, existing anti-slip structures for the collar and bellows groove often employ a single rough surface treatment, which still poses a risk of micro-displacement under high temperature and high pressure conditions. Therefore, achieving a synergistic improvement in precise positioning, uniform stress distribution, and dynamic sealing reliability of the bellows sleeve structure remains a pressing technical challenge in this field. Utility Model Content

[0004] This invention provides a sealed corrugated pipe that can solve the problem of easy deformation of corrugated hoses in the prior art.

[0005] A sealed bellows, comprising:

[0006] The tube body has a channel inside it;

[0007] A sleeve is fitted over the tube body. The outer periphery of the sleeve is corrugated. Multiple sleeves are fitted over the corrugations and embedded in the corrugations.

[0008] Preferably, in this embodiment of the application, the corrugation outside the sleeve includes convex rings, a corrugated groove is formed between the convex rings, a fixing member is disposed in the corrugated groove, the fixing member is circumferentially disposed outside the sleeve, and the height of the fixing member is less than the height of the convex rings.

[0009] Preferably, in this embodiment of the application, the height of the end of the fastener away from the channel is lower than the height of the protruding ring;

[0010] The height of the convex ring is the distance between the end of the convex ring furthest from the channel and the channel.

[0011] Preferably, in this embodiment of the application, the convex ring is a polygonal structure, the convex ring includes a plurality of first fixed sides, and a first arc-shaped connecting part is provided between adjacent first fixed sides, the plurality of first fixed sides are connected by the first arc-shaped connecting part.

[0012] Preferably, in this embodiment of the application, the kit is fitted over the fastener, and the kit has a fixing groove with the same shape as the fastener. When the kit is fitted over the fastener, the fastener abuts against the fixing groove.

[0013] Preferably, in this embodiment of the application, the fixing member is configured as a polygonal structure, the fixing member includes a plurality of second fixing sides, and a second arc-shaped connecting part is provided between adjacent second fixing sides, the plurality of second fixing sides are enclosed and connected by the second arc-shaped connecting part.

[0014] Preferably, in this embodiment of the application, the radius of curvature R1 of the first arc-shaped connecting part and the radius of curvature R2 of the second arc-shaped connecting part satisfy: 0.8R1≤R2≤1.2R1, and the length of the first fixed side L1 and the length of the second fixed side L2 satisfy L1 / L2=1.2-1.5.

[0015] Preferably, in this embodiment of the application, the fastener adopts a split structure, including at least two symmetrically arranged arc-shaped fastening blocks, and the ends of the fastening blocks are provided with mortise and tenon joints that cooperate with each other.

[0016] Preferably, in this embodiment of the application, the inner wall of the fixing groove is provided with an anti-slip texture structure, which includes protrusions and depressions arranged alternately along the circumference, wherein the protrusions have a trapezoidal cross section and a height of 0.1 to 0.3 mm.

[0017] Preferably, in this embodiment of the application, an annular cavity is formed between the fixing member and the bottom surface of the corrugated groove, and the annular cavity is filled with an elastic buffer material, the compression modulus of which is less than 1 / 5 of that of the kit material.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. By fully enclosing the corrugated structure with the kit, the height difference between the fastener and the convex ring is eliminated, making the pipe mating surface a flat sealing surface. With the conformal matching of the outer side of the kit with the outer contour of the convex ring, the gap of the corrugated groove is completely filled, effectively solving the problem of leakage at the joint of traditional corrugated pipes caused by the corrugated structure, and improving the sealing performance by more than 90%.

[0020] 2. The 0.1mm to 0.3mm anti-slip texture structure on the inner wall of the fixing groove, through the alternating circumferential convex-concave design, increases the frictional resistance between the kit and the fixing parts, avoids sealing failure caused by fluid pressure fluctuations, and ensures long-term sealing reliability under high pressure conditions.

[0021] 3. The convex ring adopts a four-sided arc transition structure. The radius of curvature R1 of its first arc connection part and the second arc connection part R2 of the fastener satisfy the matching relationship of 0.8R1≤R2≤1.2R1, which makes the stress distribution more uniform. After actual testing, the bending fatigue life of the pipeline can reach more than 200,000 times, which is 3 times longer than that of the traditional structure. The split tenon and mortise structure of the fastener (L1 / L2=1.2-1.5) is spliced ​​by arc-shaped fixing blocks, which not only ensures the convenience of installation, but also increases the axial tensile strength to 15MPa. Combined with the ring damping structure formed by the elastic buffer material, it has been tested that it can absorb more than 85% of the vibration energy, significantly reducing the impact damage of fluid pulsation on the pipe body. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the overall structure of a sealing bellows provided by this utility model;

[0024] Figure 2 A schematic diagram of a sealed bellows connection structure provided by this utility model;

[0025] Figure 3 A schematic diagram of a sealed bellows lacking a fitting provided by this utility model;

[0026] Figure 4 A side cross-sectional view of a sealing bellows provided by this utility model;

[0027] Figure 5 for Figure 4 A magnified structural diagram of area A in the middle.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100, tube body; 110, channel; 200, sleeve; 210, corrugation; 211, convex ring; 2111, first fixed edge; 2112, first arc-shaped connection; 212, corrugated groove; 2121, annular cavity; 2122, elastic cushioning material; 213, fastener; 2131, second fixed edge; 2132, second arc-shaped connection; 300, kit; 310, fixing groove. Detailed Implementation

[0030] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0031] like Figures 1 to 5 As shown in the figure, a sealed corrugated pipe provided in this embodiment of the present invention includes a pipe body 100 and a sleeve 200. A channel 110 is provided inside the pipe body 100 for transporting fluid.

[0032] In this embodiment, the sleeve 200 is fitted over the pipe body 100, and corrugations 210 are provided on the outer periphery of the sleeve 200. In this embodiment, the corrugations 210 are used to enhance the overall strength of the pipe body 100 and prevent the pipe body 100 from deforming, which would affect pipeline transportation.

[0033] In this embodiment, due to the presence of pipe corrugations 210, the joint gap between adjacent pipe bodies 100 is often affected by the corrugations 210, resulting in water leakage and affecting the overall sealing performance of the pipe body 100. To avoid this situation, a kit 300 is provided in this application embodiment. The kit 300 is fitted onto the corrugations 210 to enhance the sealing performance between the pipe bodies 100.

[0034] Specifically:

[0035] In this embodiment, the corrugation 210 mainly includes a convex ring 211 and a fixing member 213. The area around the convex ring 211 on the tube body 100 is larger than the area around the fixing member 213 on the tube body 100. A corrugated groove 212 is formed between the convex rings 211. The fixing member 213 is located in the corrugated groove 212, such that the distance between the end of the fixing member 213 away from the tube body 100 and the channel 110 is smaller than the distance between the end of the convex ring 211 away from the tube body 100 and the channel 110. At this distance, the fixing member 213 is located in the corrugated groove 212.

[0036] As described above, the convex ring 211 can evenly distribute external pressure to the entire pipe wall, avoiding fatigue cracking caused by local stress concentration. At the same time, it can significantly improve the bending ability and deformation resistance of the pipe body 100, making it adaptable to complex installation environments.

[0037] The fastener 213 can structurally fix the channel 110 and prevent deformation of the channel 110 structure.

[0038] In this embodiment, the fastener 213 is arranged in a ring shape outside the sleeve 200, and the height of the end of the fastener 213 away from the channel 110 is less than the height of the convex ring 211.

[0039] For ease of understanding, the height of the convex ring 211 is specifically set as the distance between the end of the convex ring 211 away from the channel 110 and the channel 110.

[0040] In this embodiment, the corrugated 210 is covered with a sleeve 300. More specifically, the sleeve 300 is fitted over the fastener 213, so that the sleeve 300 wraps around the fastener 213. In this embodiment, a fixing groove 310 is provided on the sleeve 300 at the position corresponding to the fastener 213. The cross-sectional size of the fixing groove 310 is the same as the cross-sectional size of the fastener 213, so that when the sleeve 300 wraps around the fastener 213, the fixing groove 310 on the sleeve 300 completely wraps around the fastener 213, making it convenient for the fastener 213 to abut against the fixing groove 310.

[0041] The main purpose of setting the kit 300 to wrap the fastener 213 is to eliminate the height difference between the fastener 213 and the convex ring 211, so as to increase the overall flatness of the sleeve 200 and increase the sealing effect when the tube body 100 is connected.

[0042] Furthermore, in order to eliminate the height difference between the fastener 213 and the protruding ring 211, in this application, the overall shape and structure of the fastener 213 need to maintain a similar structure to facilitate the wrapping of the fastener 213 by the kit 300.

[0043] Specifically:

[0044] For the convex ring 211, the convex ring 211 has multiple first fixed edges 2111, and a first arc-shaped connecting part 2112 is provided between adjacent first fixed edges 2111. The multiple first fixed edges 2111 are connected by the first arc-shaped connecting part 2112 to form the convex ring 211.

[0045] In this embodiment of the application, preferably, four first fixed edges 2111 are provided on the convex ring 211, and the four first fixed edges 2111 are connected to each other through the first arc-shaped connecting part 2112.

[0046] Preferably, in this embodiment of the application, the side of the first fixed edge 2111 away from the channel 110 can be set as a straight structure or an arc structure, and the specific structure is used according to the specific product application scenario.

[0047] In the above, the corresponding fastener 213 includes a plurality of second fixed edges 2131, and a second arc-shaped connecting part 2132 is provided between adjacent second fixed edges 2131. The plurality of second fixed edges 2131 are connected by the second arc-shaped connecting part 2132 to form the fastener 213.

[0048] Based on the above structure, the fixing groove 310 on the kit 300 wraps around the fixing member 213. At this time, the second arc-shaped connecting part 2132 is positioned corresponding to the first arc-shaped connecting part 2112, which makes the wrapping effect of the kit 300 on the corrugated 210 better, improves the overall strength of the corrugated 210 tube, and increases the fit between the kit 300 and the corrugated 210, thus improving the sealing performance.

[0049] Preferably, to increase the sealing of the connection between the tubes 100, an arc-shaped structure is provided at one end of the kit 300 away from the fixing member 213. The arc-shaped structure protrudes outward so that when two adjacent tubes 100 are connected, the arc-shaped structure first abuts against the adjacent tubes 100, which facilitates the sealing process of the subsequent connection of the tubes 100.

[0050] In order to facilitate the docking of two adjacent pipe bodies 100, the inner diameter of the channel 110 at one end of the pipe body 100 is equal to the outer diameter of the convex ring 211 of the adjacent pipe body 100, so that the convex ring 211 at one end can dock with the inner wall of the adjacent channel 110 to connect the adjacent pipe bodies 100.

[0051] Furthermore, in this embodiment, the radius of curvature R1 of the first arc-shaped connecting portion 2112 and the radius of curvature R2 of the second arc-shaped connecting portion 2132 satisfy a certain relationship, specifically 0.8R1≤R2≤1.2R1. This setting allows the fixing groove 310 to fit more tightly with the fixing member 213 when the kit 300 wraps around the fixing member 213, avoiding relative sliding between the kit 300 and the fixing member 213, and further improving the sealing performance. At the same time, the length L1 of the first fixing edge 2111 and the length L2 of the second fixing edge 2131 also satisfy a certain relationship, specifically L1 / L2=1.2-1.5. This setting allows the kit 300 to better adapt to the shape of the fixing member 213 when wrapping around the fixing member 213, improving the fit between the kit 300 and the fixing member 213.

[0052] Meanwhile, the overall shape of the side of the kit 300 away from the fastener 213 is the same as the outer shape of the convex ring 211, and the cross-sectional shape of the kit 300 is the same as the cross-sectional shape of the corrugated groove 212. This allows the kit 300 to completely fill the corrugated groove 212 when it is fitted onto the fastener 213, further improving the sealing performance of the tube body 100. In addition, the matching design of the outer shape of the kit 300 and the convex ring 211 not only enhances visual uniformity but also helps to reduce sealing problems caused by shape differences when the tube body 100 is connected.

[0053] Furthermore, in this embodiment, preferably, the fastener 213 adopts a split structure, including at least two symmetrically arranged arc-shaped fixing blocks, with mortise and tenon joints at the ends of the fixing blocks. This split structure makes the fastener 213 easier to install, and the use of mortise and tenon joints improves the connection strength between the fixing blocks, avoids relative sliding between the fixing blocks, and further improves the sealing performance.

[0054] Furthermore, in this embodiment, preferably, the inner wall of the fixing groove 310 is provided with an anti-slip texture structure, which includes alternating protrusions and depressions arranged circumferentially, with the height of the protrusions being 0.1mm to 0.3mm. This anti-slip texture structure increases the friction between the kit 300 and the fixing member 213, preventing relative sliding between them and further improving the sealing performance. Simultaneously, the protruding structure allows the anti-slip texture to better engage with the kit 300 under pressure, improving the anti-slip effect of the kit 300.

[0055] Finally, in this embodiment, an annular cavity 2121 is formed on the bottom surface of the corrugated groove 212. An elastic buffer material 2122 is disposed within the annular cavity 2121. The compressive modulus of the buffer material is less than 1 / 5 of that of the material of the kit 300, and the thickness of the elastic buffer material 2122 is 1 / 10 of the depth of the annular cavity 2121. The provision of this elastic buffer material 2122 can absorb the vibration and impact generated by the pipe body 100 when transporting fluid, protecting the overall structure of the pipe body 100 and extending the service life of the pipe body 100. At the same time, since the compressive modulus of the buffer material is less than that of the material of the kit 300, the buffer material can deform better under pressure, absorbing more energy and further improving the seismic performance of the pipe body 100.

[0056] In this embodiment of the application, the types of cushioning materials include silicone, polyurethane, etc.

[0057] In the above, the annular cavity 2121 can be configured as part of the corrugated groove 212 to facilitate the fitting 300 being embedded in the corrugated groove 212.

[0058] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A sealed bellows, characterized in that, include: The tube body has a channel inside it; A sleeve is fitted over the tube body. The outer periphery of the sleeve is corrugated. Multiple sleeves are fitted over the corrugations and embedded in the corrugations.

2. A sealed bellows as described in claim 1, characterized in that, Outside the sleeve, the corrugations include convex rings, and corrugated grooves are formed between the convex rings. A fixing member is provided in the corrugated grooves, and the fixing member is arranged in a ring shape outside the sleeve. The height of the fixing member is less than the height of the convex rings.

3. A sealed bellows as described in claim 2, characterized in that, The height of the end of the fastener away from the channel is lower than the height of the protruding ring; The height of the convex ring is the distance between the end of the convex ring furthest from the channel and the channel.

4. A sealed bellows as described in claim 2, characterized in that, The convex ring is a polygonal structure, and the convex ring includes multiple first fixed sides. A first arc-shaped connecting part is provided between adjacent first fixed sides, and the multiple first fixed sides are connected and enclosed by the first arc-shaped connecting part.

5. A sealed bellows as described in claim 4, characterized in that, The kit is fitted over the fastener, and the kit has a fixing groove with the same shape as the fastener. When the kit is fitted over the fastener, the fastener abuts against the fixing groove.

6. A sealed bellows as described in claim 4, characterized in that, The fastener is configured as a polygonal structure, and the fastener includes multiple second fixed sides. A second arc-shaped connecting part is provided between adjacent second fixed sides, and the multiple second fixed sides are connected and enclosed by the second arc-shaped connecting part.

7. A sealed bellows as described in claim 6, characterized in that, The curvature radius R1 of the first arc-shaped connecting part and the curvature radius R2 of the second arc-shaped connecting part satisfy: 0.8R1≤R2≤1.2R1, and the length of the first fixed side L1 and the length of the second fixed side L2 satisfy L1 / L2=1.2-1.

5.

8. A sealed bellows as described in claim 2, characterized in that, The fastener adopts a split structure, including at least two symmetrically arranged arc-shaped fastening blocks, and the ends of the fastening blocks are provided with mortise and tenon joints that cooperate with each other.

9. A sealed bellows as described in claim 5, characterized in that, The inner wall of the fixing groove is provided with an anti-slip texture structure, which includes protrusions and depressions arranged alternately along the circumference, and the height of the protrusions is 0.1mm to 0.3mm.

10. A sealed bellows as described in claim 2, characterized in that, An annular cavity is formed on the bottom surface of the corrugated groove, and the annular cavity is filled with an elastic cushioning material. The compressive modulus of the elastic cushioning material is less than 1 / 5 of the compressive modulus of the kit.

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