Medium conveying pipeline

Abstract

The utility model relates to the technical field of medium conveying, and discloses a medium conveying pipeline. The medium conveying pipeline comprises a pipeline body and a flow guide part, a medium flow channel is formed in the pipeline body, and a medium inlet and a medium outlet which communicate with the medium flow channel are formed in the two ends of the pipeline body correspondingly; the flow guide part is arranged in the medium flow channel, the flow guide part can guide a flowing path of a medium flowing into the medium flow channel, the gas phase and the liquid phase of the medium conveyed along the flowing path are separated, and the gas phase and the liquid phase jointly flow out of the medium outlet. According to the medium conveying pipeline provided by the utility model, the flow guide piece is arranged in the pipeline body, so that the medium can move along the preset flowing path, and the gas phase and the liquid phase of the medium are separated, so that the flowing state rule, the slug flow and the slug flow of the gas phase and the liquid phase of the medium disappear; the purpose of reducing vibration of the medium conveying pipeline can be achieved, and potential safety hazards existing in the using process of the medium conveying pipeline are reduced or eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of medium transportation, in particular to a medium transportation pipeline. Background Art

[0002] The problem of pipeline vibration induced by gas-liquid two-phase flow is widespread across various engineering applications, such as flow pipelines in the chemical industry, industrial two-phase flow heat exchangers, and the outlet piping of hydrogen electrolyzers. When the gas and liquid phases flow within a pipeline, the flow pattern may gradually separate from a gas-liquid mixed state, developing into slug flow or slug flow, causing strong vibration in the pipeline. At locations such as pipeline tees, where the fluids converge, the flow of the gas and liquid phases undergoes drastic changes, which can also cause strong vibration. Long-term vibration inevitably leads to wear and stress fatigue of the pipe structure, especially at the connection between the pipeline and equipment. It can even cause leakage and damage at the interface between the equipment itself and the pipeline, posing a significant safety hazard.

[0003] Currently, existing vibration reduction technologies for piping system vibration induced by two-phase flow primarily include optimizing piping layout and installing supports. Optimizing piping layout primarily involves using measures such as large-radius elbows and 45° tees, which can mitigate pipeline vibration to a certain extent. Installing supports involves supporting the pipeline with supports, increasing the rigidity of the supports and improving the pipeline's vibration resistance. Rigid supports are generally used, reducing the use of spring supports and hangers. Guide frames, limit frames, and, where necessary, damping shock absorbers are installed. Installing supports can limit pipeline vibration to a certain extent, but it cannot eliminate pipeline vibration.

[0004] Optimizing the piping layout cannot effectively prevent slug and slug flow within the pipes. Therefore, it can only reduce vibration generation points to a certain extent, but cannot completely solve the vibration problem caused by two-phase flow. This is because elbows and connecting pipes cannot be completely eliminated in piping systems. Typically, inclined pipes or risers are inevitably present in piping systems, which are the most common causes of slug and slug flow.

[0005] The bracket installation method is to passively fix the pipeline or use a damper to attenuate vibration. The disadvantages of bracket fixing or installing a damper are that the installation conditions must be met, the installation is relatively complicated, and it will damage the appearance of the pipeline.

[0006] It can be seen that the current method of reducing vibration cannot prevent the formation of slug flow and slug flow in the pipe. In essence, vibration still exists and safety hazards still exist. Utility Model Content

[0007] In order to solve the above technical problem or at least partially solve the above technical problem, the utility model provides a medium conveying pipeline.

[0008] The utility model provides a medium conveying pipeline, comprising:

[0009] A pipe body, wherein a medium flow channel is formed inside, and a medium inlet and a medium outlet are respectively provided at both ends of the pipe body, which are connected to the medium flow channel;

[0010] A flow guide is provided in the medium flow channel, and the flow guide can guide the flow path of the medium flowing into the medium flow channel, and separate the gas phase and liquid phase of the medium transmitted along the flow path, and the gas phase and the liquid phase flow out of the medium outlet together.

[0011] Optionally, the flow guide comprises at least one spirally twisted plate disposed in the medium flow channel, wherein the outer periphery of the spirally twisted plate and the inner wall of the pipe body form the flow path, and the flow path is spiral.

[0012] Optionally, there are multiple spirally twisted sheets, and the multiple spirally twisted sheets are arranged at intervals along the extension direction of the pipe body.

[0013] Optionally, there is one spiral twisted piece, and the length of the spiral twisted piece matches the length of the pipe body.

[0014] Optionally, the axis of the spirally twisted sheet coincides with the axis of the pipe body.

[0015] Optionally, the pitch of the spiral twisted piece is P, and the diameter of the pipe body is D, wherein 0.5D<P<2D.

[0016] Optionally, the multiple pitches of the helical twisted sheets are the same or different.

[0017] Optionally, a first connecting flange and a second connecting flange are respectively provided at both ends of the pipeline body.

[0018] Optionally, the distance between the end of the pipe body and the first connecting flange is h, and the diameter of the pipe body is D, wherein 0.6D<Δh<2D;

[0019] And / or, the distance between the end of the pipe body and the second connecting flange is h, and the diameter of the pipe body is D, wherein 0.6D<Δh<2D.

[0020] Optionally, the pipe body is in the shape of a straight pipe or a curved pipe.

[0021] The technical solution provided by the embodiment of the utility model has the following advantages compared with the prior art:

[0022] The medium conveying pipeline provided by the utility model can move the medium along a preset flow path and separate the gas phase and liquid phase of the medium by arranging a flow guide inside the pipeline body, so that the flow state of the gas phase and liquid phase of the medium is regular, and the slug flow and slug flow disappear, which can achieve the purpose of reducing the vibration of the medium conveying pipeline and reduce or eliminate the safety hazards existing in the use of the medium conveying pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings herein are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0024] In order to more clearly illustrate the implementation mode of the utility model or the technical solution in the prior art, the drawings required for use in the implementation mode or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 This is a schematic structural diagram of the medium delivery pipeline according to an embodiment of the present utility model;

[0026] Figure 2 The flow pattern of the medium in the embodiment of the present utility model is bubbly flow;

[0027] Figure 3 The flow pattern of the medium in the embodiment of the present utility model is slug flow;

[0028] Figure 4 The flow pattern of the medium in the embodiment of the present utility model is a slug flow;

[0029] Figure 5 This is a diagram showing the flow pattern changes inside the pipeline when the pipeline with spiral twisted blades is not used to transport the medium;

[0030] Figure 6 This is a diagram of flow pattern changes inside the pipeline body when the medium is transported using the medium transport pipeline described in the embodiment of the present utility model.

[0031] Description of Reference Numerals

[0032] 1. Pipeline body; 11. Medium flow channel; 12. Medium inlet; 13. Medium outlet; 2. Flow guide; 21. Spiral twisted piece; 3. First connecting flange; 4. Second connecting flange. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0034] The following description sets forth many specific details to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the implementation methods in the specification are only part of the implementation methods of the present invention, not all of the implementation methods.

[0035] The main reason for pipeline vibration caused by gas-liquid two-phase flow is closely related to the flow pattern in the pipe. Different flow patterns will cause different vibration forms and different vibration intensities. Figure 2 The flow pattern of the middle medium is bubbly flow, and the vibration caused by bubbly flow is relatively small. Figure 3 The flow pattern of the medium is slug flow. Figure 4 The flow pattern of the intermediate medium is slug flow, with slug and slug flows causing the most intense vibrations. Slug flow is most commonly caused by the presence of a downpipe or riser in the pipeline. The alternating flow of gas and liquid within the pipeline creates intermittent liquid and gas slugs. Variations in pipe size or flow velocity can also cause slug flow. Slug flow is caused by increased gas flow, which leads to bubble coalescence, ultimately forming slug flow. Alternatively, porosity wave instability can cause bubble coalescence, forming slug flow.

[0036] like Figure 1 As shown, the medium conveying pipeline provided by the embodiment of the present utility model includes a pipeline body 1 and a flow guide 2.

[0037] The pipe body 1 has a medium flow channel 11 formed inside. The medium flow channel 11 allows for the flow of medium. A medium inlet 12 and a medium outlet 13 are provided at both ends of the pipe body 1, communicating with the medium flow channel 11. The medium can flow into the medium flow channel 11 through the medium inlet 12 and then out to the target location through the medium outlet 13. The medium in this location includes both gas and liquid phases.

[0038] The flow guide 2 is disposed within the medium flow channel 11. The flow guide 2 and the medium flow channel 11 may be connected in any manner, such as by welding. The flow guide 2 is capable of guiding the flow path of the medium flowing into the medium flow channel 11 and separating the gas phase and liquid phase of the medium transported along the flow path. Separation in this context refers to separation perpendicular to the flow direction of the medium, allowing the gas phase and liquid phase to flow in layers, avoiding the formation of slug flow or slug flow. The gas phase and liquid phase flow out of the medium outlet 13 together and flow through the medium outlet 13 to the next target location.

[0039] The medium conveying pipeline provided by the present invention, by disposing a flow guide 2 within the pipeline body 1, can move the medium along a predetermined flow path and separate the gas and liquid phases of the medium, thereby regularizing the flow of the gas and liquid phases and eliminating slug flow and slug flow. This can achieve the purpose of reducing vibration in the medium conveying pipeline and reduce or eliminate safety hazards during use of the medium conveying pipeline. Furthermore, the flow guide 2 is disposed within the pipeline body 1, making it easy to install, independent of external installation conditions, and without disrupting the existing pipeline layout.

[0040] In some embodiments, as Figure 1 As shown, the flow guide 2 includes at least one spirally twisted piece 21 arranged in the medium flow channel 11, and the outer periphery of the spirally twisted piece 21 and the inner wall of the pipe body 1 form a flow path, and the flow path is spiral.

[0041] Specifically, the spiral twisted blade 21 includes a screw shaft and a twisted blade helically wound around the outer circumference of the screw shaft. The spirally extended twisted blade forms a spiral flow path. During installation, to facilitate the insertion of the spiral twisted blade 21 into the medium flow channel 11, the outer diameter of the spiral twisted blade 21 should be slightly smaller than the diameter of the medium flow channel 11, so that the spiral twisted blade 21 can be inserted into the medium flow channel 11. The distance between the spiral twisted blade 21 and the inner wall of the pipe body 1 is also small, so that the outer circumference of the spiral twisted blade 21 and the inner wall of the pipe body 1 form a spiral flow path.

[0042] Under this design, after the medium enters the medium flow channel 11, the medium will be transported along a spiral flow path, and then the spiral twisted blade 21 will convert the medium's linear transport path into a spiral transport path. At this time, due to the different densities of the gas phase and liquid phase in the medium, under the action of centrifugal force, the gas phase and the liquid phase are separated. The gas phase has a lower density and gathers at the screw shaft position of the spiral twisted blade 21 to form an air core. The liquid phase has a higher density and is thrown to the inner wall position of the pipe body 1 under the action of centrifugal force, so that the liquid phase surrounds the periphery of the gas phase and is transported synchronously with the gas phase, and then flows together to the next target position through the medium outlet 13. The flow guide 2 under this design facilitates the formation of the flow path, making the flow state of the medium regular, and eliminating the slug flow and slug flow, effectively reducing the vibration problem of the pipe body 1 caused by the slug flow and slug flow.

[0043] In the present application, the arrangement of the spirally twisted blades 21 may include multiple embodiments. The following describes various arrangements of the spirally twisted blades 21:

[0044] First implementation method

[0045] There are multiple spirally twisted sheets 21 , and the multiple spirally twisted sheets 21 are arranged at intervals along the extension direction of the pipe body 1 .

[0046] The multiple spiral twisted blades 21 are arranged at intervals so that after the medium enters the medium flow channel 11, the medium will be transported along a spiral flow path, and then the spiral twisted blades 21 will convert the straight conveying path of the medium into a spiral conveying path, and then under the action of centrifugal force, the gas phase forms an air core at the screw shaft position, and the liquid phase surrounds the periphery of the gas phase and is transported synchronously with the gas phase. When the medium moves to the gap position between two adjacent spiral twisted blades 21, the medium still maintains the state of liquid phase surrounding the periphery of the gas phase and being transported synchronously with the gas phase under the action of inertia force. After entering the next spiral twisted blade 21, it plays a role of spiral guide for the transportation of the medium, ensuring that the medium can continue to be transported along the spiral trajectory and separating the gas phase and the liquid phase.

[0047] With this design, the length of a single spirally twisted piece 21 can be reduced, thereby reducing the difficulty of manufacturing the spirally twisted piece 21 and reducing the manufacturing cost.

[0048] It is understandable that the intervals between two adjacent spiral twisted blades 21 can be the same or different, which is not restrictive. It only needs to ensure that the medium after being guided by multiple spiral twisted blades 21 can achieve gas phase and liquid phase separation and transportation.

[0049] Second implementation method

[0050] There is one spiral twisted piece 21, and the length of the spiral twisted piece 21 matches the length of the pipe body 1. The length matching here means that the length of the spiral twisted piece 21 is less than the length of the pipe body 1, and the length of the spiral twisted piece 21 is close to the length of the pipe body 1.

[0051] After the medium enters the medium flow channel 11 and passes through the spiral twisted blade 21, the medium will be transported along the spiral flow path, and then the spiral twisted blade 21 will convert the linear transport path of the medium into a spiral transport path, and then under the action of centrifugal force, the gas phase forms an air core at the screw shaft position, and the liquid phase surrounds the outer periphery of the gas phase and is transported synchronously with the gas phase. When the medium moves to the end of the spiral twisted blade 21, the medium still maintains the state of the liquid phase surrounding the outer periphery of the gas phase and being transported synchronously with the gas phase under the action of inertia, and maintains this state to flow out of the pipeline body 1.

[0052] It is understood that the distances between the ends of the spirally twisted blade 21 and the ends of the pipe body 1 can be the same or different, and the size can be designed according to actual needs. However, it is necessary to ensure that the medium guided by the spirally twisted blade 21 remains in a spiral conveying state after being output through the medium outlet 13 of the pipe body 1. When receiving the spirally conveyed medium, the medium entering the pipe body 1 remains in a spiral conveying state before entering the spirally twisted blade 21.

[0053] It is understandable that the difference between the length of the spiral twisted blade 21 and the length of the pipe body 1 can also be relatively large, but it is necessary to ensure that the medium guided by the spiral twisted blade 21 remains in a spiral conveying state after being output through the medium outlet 13 of the pipe body 1.

[0054] In some embodiments, the axis of the helical twisted piece 21 coincides with the axis of the pipe body 1 .

[0055] Under this design method, the matching degree between the spiral twisted piece 21 and the pipe body 1 can be increased, so that the spiral twisted piece 21 can penetrate into the pipe body 1 along the axial direction of the pipe body 1, and the outer periphery of the spiral twisted piece 21 can fit with the inner wall of the pipe body 1 or make the gap between the two uniform, thereby ensuring the conveying effect of the medium.

[0056] In some embodiments, the pitch of the helical twisted blade 21 is P, and the diameter of the pipe body 1 is D, wherein 0.5D<P<2D.

[0057] Under this design, after the medium enters the flow path formed between the spiral twisted blade 21 and the pipe body 1, the gas phase and the liquid phase can be separated under the action of centrifugal force, thereby ensuring the separation effect between the gas phase and the liquid phase.

[0058] In some embodiments, the pitches of the multiple helical twisted sheets 21 are the same.

[0059] In this design, the spirally twisted blades 21 can form a uniform flow path to ensure stable delivery of the medium, and the uniform spirally twisted blades 21 can reduce the difficulty of manufacturing and increase the convenience of manufacturing.

[0060] In some embodiments, the multiple pitches of the helical twisted sheets 21 are different.

[0061] Under this design, the cross-sectional widths of different sections of the flow path formed by the spiral twisted blade 21 are different, so as to change the flow speed of the medium after entering different sections, thereby accelerating or decelerating the medium, meeting the separation requirements of the gas phase and liquid phase of the medium, and ensuring that the medium output through the pipeline body 1 is transported along the spiral and the gas phase and liquid phase are separated.

[0062] It is understood that the pitch of the spiral twisted blade 21 gradually decreases in the direction toward the medium outlet 13 to accelerate the medium, ensure spiral conveyance of the medium flowing out of the pipe body 1, and enable spiral conveyance of the medium entering the next pipe body 1. Alternatively, the pitch of the spiral twisted blade 21 gradually increases in the direction toward the medium outlet 13 to decelerate the medium and prevent the medium from flowing too fast to the next target location.

[0063] It can be seen that the arrangement of the pitch of the spiral twisted pieces 21 of the present application is not restricted and can be selected according to actual needs.

[0064] In some embodiments, a first connecting flange 3 and a second connecting flange 4 are respectively provided at both ends of the pipeline body 1 .

[0065] Specifically, when the length of the pipe body 1 is greater than 2m, a first connecting flange 3 and a second connecting flange 4 are fixedly connected at both ends of the pipe body 1, so as to be connected to the adjacent pipe body 1 or other components through the first connecting flange 3 and the second connecting flange 4, respectively, to increase the firmness and sealing of the connection.

[0066] In some embodiments, the distance between the end of the pipe body 1 and the first connecting flange 3 is h, and the diameter of the pipe body 1 is D, wherein 0.6D<Δh<2D.

[0067] Under this design, the medium entering the pipe body 1 along the spiral trajectory remains in a spiral conveying state before entering the flow path, ensuring that it can be conveyed along the spiral trajectory in multiple pipe bodies 1 to ensure the separate conveyance of gas and liquid phases and avoid vibration of the pipe body 1.

[0068] In some embodiments, the distance between the end of the pipe body 1 and the second connecting flange 4 is h, and the diameter of the pipe body 1 is D, wherein 0.6D<Δh<2D.

[0069] Under this design, the medium spirally conveyed by the spiral twisted blade 21 remains in a spiral conveying state after flowing out of the end of the spiral twisted blade 21, while ensuring that the medium flowing out of the medium outlet 13 of the pipeline body 1 is conveyed along a spiral trajectory to ensure the separation and transportation of the gas phase and the liquid phase, and avoid the vibration of the pipeline body 1.

[0070] In some embodiments, the pipe body 1 is in a straight or curved shape. When the pipe body 1 is in a straight shape, the helical twisted blades 21 extend along the axis of the pipe body 1. When the pipe body 1 is in a curved shape, the extension direction of the helical twisted blades 21 aligns with the extension direction of the curved shape, ensuring the formation of a flow path and ensuring efficient medium transport.

[0071] It can be seen that the extension method of the pipeline body 1 of the present application is not restricted and can be designed according to actual needs.

[0072] Below is 1000Nm 3 Specific embodiments and comparative examples of the alkali solution electrolytic cell are described.

[0073] 1000Nm 3 / h The main component of the alkali liquid in the alkali liquid electrolytic cell is KOH solution. The outlet of the electrolytic cell is a two-phase flow of alkali liquid and hydrogen, which then enters the medium delivery pipeline. The temperature is 85℃, the pressure is 1.6MPa, and the hydrogen volume flow rate Q1 is 62.5m 3 / h, the volume flow rate of alkali solution Q2 is 25m 3 / h.

[0074] The medium conveying pipeline provided in this embodiment includes a spirally twisted blade 21 arranged along the medium flow direction, as well as a first connecting flange 3, a second connecting flange 4, and a pipeline body 1. The spirally twisted blade 21 is located within the pipeline body 1 and is secured to the ends of the pipeline body 1 by welding. Alternatively, flange connections or other methods may be used, and these are not limiting. The first connecting flange 3 and the second connecting flange 4 are located at opposite ends of the pipeline body 1, respectively. The medium inlet 12 is located at the first connecting flange 3, and the medium outlet 13 is located at the second connecting flange 4.

[0075] In this embodiment, based on given process requirements, the structural parameters of the medium conveying pipeline can be designed according to the formulas and / or parameter ranges provided in this utility model. In order to illustrate the effective vibration reduction effect of the utility model in detail, this embodiment compares the changes in the flow field in the pipeline with and without the spiral twisted blades 21.

[0076] In the comparative example, no spiral twisted piece 21 is provided in the pipe. Figure 5 The figure is a distribution cloud diagram of the gas-liquid two-phase flow in a vertical pipeline without spiral twisted blades 21. Figure 5 It can be seen that from the tube inlet to 500mm, the bubbles gradually develop and converge to form smaller bullet-shaped bubbles; continuous small bullet-shaped bubbles appear at 500-1000mm, and then the bubbles gather at the upper end to form larger bullet-shaped bubbles, forming obvious bullet flow in the tube, and obvious gas plug flow appears at the end of the tube at 500mm.

[0077] like Figure 6 As shown, for the medium delivery pipeline in this embodiment, a spiral twisted piece 21 is set in the pipeline body 1, and the calculation results are Figure 6 The flow pattern change result diagram inside the pipe body 1 is shown in FIG. Figure 6 It can be seen that under the action of centrifugal force, the liquid phase with high density is thrown close to the pipe wall, and the gas phase gathers in the center to form an air core. The flow state is regular, the two phases are in the form of a vortex, the flow is relatively stable, and the slug flow phenomenon is effectively avoided. This shows that the medium flowing in the pipe body 1 provided with the spiral twisted blade 21 will not produce vibrations caused by slug flow and slug flow, which can well meet the engineering needs and greatly reduce vibration. In addition, as the flow rate increases, the centrifugal force increases, and the vibration damper has a better shock absorption effect. This shows that the medium conveying pipeline of this embodiment has good stability and is less dependent on the flow rate. In actual engineering applications, it has a wide range of uses and obvious practical advantages.

[0078] It can be seen that the medium conveying pipeline provided by the utility model changes the two-phase flow pattern from the level of the fluid flow state in the pipe, prevents the formation of elastic flow and slug flow, solves the problem of vibration generated by the two-phase flow from the inside of the fluid, and increases the service life of the pipeline body 1.

[0079] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0080] The foregoing description is intended only to provide specific embodiments of the present invention, intended to enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments described herein, but rather to conform to the broadest scope consistent with the principles and novel features of the present invention described herein.

Claims

1. A medium conveying pipeline, characterized in that: include: A pipe body (1) is formed with a medium flow channel (11) therein, and a medium inlet (12) and a medium outlet (13) are respectively provided at both ends of the pipe body (1) and are communicated with the medium flow channel (11); A flow guide (2) is arranged in the medium flow channel (11), and the flow guide (2) can guide the flow path of the medium flowing into the medium flow channel (11), and separate the gas phase and the liquid phase of the medium transmitted along the flow path, and the gas phase and the liquid phase flow out of the medium outlet (13) together.

2. The medium conveying pipeline according to claim 1, characterized in that: The flow guide (2) comprises at least one spirally twisted piece (21) arranged in the medium flow channel (11), wherein the outer periphery of the spirally twisted piece (21) and the inner wall of the pipe body (1) form the flow path, and the flow path is spiral.

3. The medium conveying pipeline according to claim 2, characterized in that: There are a plurality of spirally twisted sheets (21), and the plurality of spirally twisted sheets (21) are arranged at intervals along the extension direction of the pipe body (1).

4. The medium conveying pipeline according to claim 2, characterized in that: There is one spiral twisted piece (21), and the length of the spiral twisted piece (21) matches the length of the pipe body (1).

5. The medium conveying pipeline according to claim 2, characterized in that: The axis of the spirally twisted piece (21) coincides with the axis of the pipe body (1).

6. The medium conveying pipeline according to claim 2, characterized in that: The pitch of the spiral twisted piece (21) is P, and the diameter of the pipe body (1) is D, wherein 0.5D<P<2D.

7. The medium conveying pipeline according to claim 2, characterized in that: The multiple pitches of the helical twisted sheets (21) are the same or different.

8. The medium conveying pipeline according to claim 2, characterized in that: A first connecting flange (3) and a second connecting flange (4) are respectively provided at both ends of the pipeline body (1).

9. The medium conveying pipeline according to claim 8, characterized in that: The distance between the end of the pipe body (1) and the first connecting flange (3) is h, and the diameter of the pipe body (1) is D, wherein 0.6D<Δh<2D; And / or, the distance between the end of the pipe body (1) and the second connecting flange (4) is h, the diameter of the pipe body (1) is D, wherein 0.6D<Δh<2D.

10. The medium conveying pipeline according to any one of claims 1 to 9, characterized in that: The pipe body (1) is in the shape of a straight pipe or a curved pipe.

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