Double-walled hollow tube with turbulent structure

Abstract

The utility model belongs to hollow pipe technical field, concretely is a kind of double-wall hollow pipe with turbulent flow structure, including one flange, one end of one flange swing joint has inlet inner tube, and the inner wall of inlet inner tube is equipped with small pitch thread fin setting.Has the cooperation of one flange, inlet inner tube, small pitch thread fin, first spoiler column, middle section inner tube, large pitch thread fin, second spoiler column, outlet inner tube and stable pit, so that initial boundary layer can be quickly destroyed when fluid enters inlet inner tube, and it keeps turbulent flow state while reducing resistance after entering middle section inner tube, so that initial boundary layer can be quickly destroyed when fluid enters the utility model inside.The utility model realizes the initial boundary layer of quick destruction fluid, and prolongs service life.

Description

Technical Field

[0001] This utility model belongs to the field of hollow tube technology, specifically a double-walled hollow tube with a turbulent structure. Background Technology

[0002] Hollow pipe is a type of pipe made from high-density polyethylene (HDPE) or polyvinyl chloride (PVC-U) and is widely used in municipal engineering, drainage, and irrigation. Definition of hollow pipe: Hollow pipe refers to a pipe with a hollow structure, typically made of materials such as high-density polyethylene (HDPE) or polyvinyl chloride (PVC-U). Its structural design gives it excellent load-bearing capacity and seismic performance, making it suitable for various engineering applications.

[0003] Chinese patent publication number CN220759507U discloses an internal spiral hollow tube device, including a connecting pipe connected to a coal mill, a hollow tube assembly, a connecting assembly, and a buffer assembly. The connecting pipe has a connecting assembly at its bottom, and the hollow tube assembly is located directly below the connecting assembly. The hollow tube assembly has a buffer assembly on its surface. The connecting pipe is connected to the hollow tube assembly by snap-fitting.

[0004] However, existing hollow tubes cannot quickly disrupt the initial boundary layer of the fluid and have a short service life. Summary of the Invention

[0005] The purpose of this invention is to provide a double-walled hollow tube with a turbulent structure to solve the problems mentioned in the background art.

[0006] The specific technical solution adopted by this utility model is as follows: A double-walled hollow tube with a turbulent flow structure includes a first flange, one end of which is movably connected to an inlet inner tube, and the inner wall of the inlet inner tube is provided with small-pitch threaded ribs, the inner wall of the inlet inner tube is provided with a first turbulence column, and one end of the inlet inner tube is provided with a middle section inner tube.

[0007] The inner wall of the middle section inner tube is provided with a large pitch threaded rib, and the inner wall of the middle section inner tube is provided with a second turbulence column. One end of the middle section inner tube is provided with an outlet inner tube, and the inner wall of the outlet inner tube is provided with a stabilizing pit.

[0008] Furthermore, the outer wall of the inlet inner tube is fixedly connected with a supporting rib, and the outer wall of the supporting rib is fixedly connected with the outer wall of the middle section inner tube.

[0009] Furthermore, the outer wall of the supporting rib is fixedly connected to the outer wall of the outlet inner tube, and the outer wall of the supporting rib is fixedly connected with reinforcing ribs.

[0010] Furthermore, the outer wall of the reinforcing rib is fixedly connected to an outer tube, and the inner wall of the outer tube is movably connected to the outer wall of the supporting rib, and a heat insulation layer is installed on the inner wall of the outer tube.

[0011] Furthermore, one end of the No. 1 flange is movably connected to one end of the outer pipe, and the other end of the No. 1 flange is bolted to the No. 2 flange.

[0012] Furthermore, a bellows is installed at one end of the second flange, and a third flange is installed at one end of the bellows.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes the interaction of a first flange, an inlet inner pipe, a small-pitch threaded rib, a first turbulence column, a middle section inner pipe, a large-pitch threaded rib, a second turbulence column, an outlet inner pipe, and a stabilizing recess to create a turbulent structure within the invention. This rapidly disrupts the initial boundary layer of the fluid entering the inlet inner pipe and maintains turbulence while reducing resistance after entering the middle section inner pipe. Furthermore, the rapid disruption of the initial boundary layer enhances radial mixing of the fluid within the pipe. The interaction between the outlet inner pipe and the stabilizing recess generates micro-vortices to maintain turbulence rather than intensify it, thus reducing outlet wake resistance.

[0014] This invention, through the coordinated use of supporting ribs, reinforcing ribs, an outer tube, a heat insulation layer, a second flange, a bellows, and a third flange, makes the invention more stable during use and reduces heat loss from the fluid. This results in better structural strength and thermal stability, extending the service life of the invention. Furthermore, the use of the bellows optimizes and enhances thermal deformation compensation capabilities, strengthens connection sealing, and reduces stress concentration. The outer tube creates a double-wall structure, preventing direct contact between the internal turbulent structure and the external environment, reducing wear, lowering corrosion risk, and further extending the service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the connection structure between the No. 1 flange and the inlet inner pipe of this utility model; Figure 3 This is a schematic diagram of the connection structure between the inlet inner tube and the small-pitch threaded rib of this utility model; Figure 4 This is a schematic diagram of the connection structure between the outlet inner tube and the stabilizing recess of this utility model; Figure 5 This is a schematic diagram of the connection structure between the outer tube and the insulation layer of this utility model.

[0016] In the diagram: 1. Flange No. 1; 2. Inlet inner tube; 3. Small-pitch threaded rib; 4. First turbulence column; 5. Middle section inner tube; 6. Large-pitch threaded rib; 7. Second turbulence column; 8. Outlet inner tube; 9. Stabilizing recess; 10. Support rib; 11. Reinforcing rib; 12. Outer tube; 13. Insulation layer; 14. Flange No. 2; 15. Bellows; 16. Flange No. 3. Detailed Implementation

[0017] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0018] Example 1 like Figures 1-5 As shown, a double-walled hollow tube with a turbulent structure includes a first flange 1, an inlet inner tube 2 movably connected to one end of the first flange 1, and a small-pitch threaded rib 3 installed on the inner wall of the inlet inner tube 2, a first turbulence column 4 installed on the inner wall of the inlet inner tube 2, and a middle section inner tube 5 installed at one end of the inlet inner tube 2.

[0019] The inner wall of the middle section inner tube 5 is equipped with a large-pitch threaded rib 6, and a second turbulence column 7 is also installed on the inner wall of the middle section inner tube 5. An outlet inner tube 8 is installed at one end of the middle section inner tube 5, and a stabilizing pit 9 is formed on the inner wall of the outlet inner tube 8. This allows the initial boundary layer to be quickly destroyed when the fluid enters the inlet inner tube 2, and the fluid will maintain a turbulent state while reducing resistance after entering the middle section inner tube 5. This allows the initial boundary layer to be quickly destroyed when the fluid enters the interior of this utility model, and it is also beneficial to enhance the radial mixing of the fluid inside the tube.

[0020] In this embodiment, the interaction of flange 1, inlet inner tube 2, small-pitch threaded rib 3, first turbulence column 4, middle section inner tube 5, large-pitch threaded rib 6, second turbulence column 7, outlet inner tube 8, and stabilizing recess 9 creates a turbulent structure inside the invention. This allows the initial boundary layer to be rapidly disrupted when the fluid enters the inlet inner tube 2, and the turbulent state is maintained while resistance is reduced after entering the middle section inner tube 5. This rapid disruption of the initial boundary layer enhances radial mixing of the fluid within the tube. Furthermore, the interaction of the outlet inner tube 8 and stabilizing recess 9 generates micro-vortices to maintain the turbulent state rather than intensifying it, thus reducing outlet wake resistance.

[0021] Example 2 Based on Embodiment 1, the outer wall of the inlet inner tube 2 is fixedly connected with a support rib 10, and the outer wall of the support rib 10 is fixedly connected with the outer wall of the middle section inner tube 5. The outer wall of the support rib 10 is fixedly connected with the outer wall of the outlet inner tube 8, and the outer wall of the support rib 10 is fixedly connected with a reinforcing rib 11.

[0022] The outer wall of the reinforcing rib 11 is fixedly connected to the outer pipe 12, and the inner wall of the outer pipe 12 is movably connected to the outer wall of the supporting rib 10. The inner wall of the outer pipe 12 is provided with a heat insulation layer 13. One end of the first flange 1 is movably connected to one end of the outer pipe 12, and the other end of the first flange 1 is connected to the second flange 14 by bolts. One end of the second flange 14 is provided with a bellows 15, and one end of the bellows 15 is provided with a third flange 16. This makes the present invention more stable during use and can reduce the heat loss of the fluid, thus improving the structural strength and thermal stability of the present invention during use and extending its service life.

[0023] In this embodiment, the cooperation of the supporting ribs 10, reinforcing ribs 11, outer tube 12, insulation layer 13, second flange 14, bellows 15, and third flange 16 makes the present invention more stable during use and reduces heat loss of the fluid. This improves the structural strength and thermal stability of the present invention during use, extends its service life, and optimizes the thermal deformation compensation capability, enhances the connection sealing, and reduces stress concentration through the use of the outer tube 12. Furthermore, the outer tube 12 enables the present invention to form a double-wall structure, preventing the internal turbulent structure from directly contacting the external environment, reducing wear, lowering the risk of corrosion, and further extending its service life.

[0024] In use, the present invention is installed in the designated position via flange 16. After installation, the fluid enters the interior of the inlet inner pipe 2 through the bellows 15. When the fluid enters the interior of the inlet inner pipe 2, it passes through the small-pitch threaded ribs 3 and the first turbulence column 4. The small-pitch threaded ribs 3 and the first turbulence column 4 cause the fluid to form strong shear turbulence, quickly breaking up the initial laminar boundary layer and enhancing the radial mixing of the fluid inside the pipe. When the fluid enters the interior of the middle section inner pipe 5 through the inlet inner pipe 2, the fluid passes through the large-pitch threaded ribs 6 and the second turbulence column 7. The large-pitch threaded ribs 6 are a weaker disturbance structure than the small-pitch threaded ribs 3. This design allows the fluid to maintain a turbulent state while reducing resistance. When the fluid enters the inner tube 8 of the outlet, it passes through the stabilizing recess 9. As the fluid passes through the stabilizing recess 9, it generates tiny eddies to maintain a turbulent state, rather than enhancing the turbulence, thus reducing the outlet wake resistance. Furthermore, the structural support provided by the supporting ribs 10 and reinforcing ribs 11 can extend the service life of this invention. In addition, the invention is equipped with a heat insulation layer 13 to ensure thermal stability, further extending the service life of this invention. Moreover, the connection method of the corrugated pipe 15 can optimize and improve the thermal deformation compensation capability, enhance the connection sealing and reduce stress concentration.

[0025] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A double-walled hollow tube with a turbulent flow structure, characterized in that, Includes a No. 1 flange (1), one end of which is movably connected to an inlet inner pipe (2), and the inner wall of the inlet inner pipe (2) is provided with a small pitch threaded rib (3), the inner wall of the inlet inner pipe (2) is provided with a first turbulence column (4), and one end of the inlet inner pipe (2) is provided with a middle section inner pipe (5). The inner wall of the middle section inner tube (5) is provided with a large pitch threaded rib (6), and the inner wall of the middle section inner tube (5) is provided with a second turbulence column (7). One end of the middle section inner tube (5) is provided with an outlet inner tube (8), and the inner wall of the outlet inner tube (8) is provided with a stabilizing pit (9).

2. The double-walled hollow tube with a turbulent structure according to claim 1, characterized in that, The outer wall of the inlet inner tube (2) is fixedly connected with a support rib (10), and the outer wall of the support rib (10) is fixedly connected with the outer wall of the middle section inner tube (5).

3. A double-walled hollow tube with a turbulent structure according to claim 2, characterized in that, The outer wall of the supporting rib (10) is fixedly connected to the outer wall of the outlet inner tube (8), and the outer wall of the supporting rib (10) is fixedly connected with a reinforcing rib (11).

4. A double-walled hollow tube with a turbulent structure according to claim 3, characterized in that, The outer wall of the reinforcing rib (11) is fixedly connected to the outer tube (12), and the inner wall of the outer tube (12) is movably connected to the outer wall of the supporting rib (10), and the inner wall of the outer tube (12) is provided with a heat insulation layer (13).

5. A double-walled hollow tube with a turbulent structure according to claim 1, characterized in that, One end of the first flange (1) is movably connected to one end of the outer pipe (12), and the other end of the first flange (1) is connected to the second flange (14) by bolts.

6. A double-walled hollow tube with a turbulent structure according to claim 5, characterized in that, A bellows (15) is installed at one end of the second flange (14), and a third flange (16) is installed at one end of the bellows (15).

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