DRAINAGE PIPE WITH PASSIVE FLOW DIRECTION INTERNAL SURFACE GEOMETRY AND ITS MANUFACTURING METHOD.

Abstract

This invention relates to a drainage pipe with a special surface geometry and a passive flow control function on its inner surface, intended for use in drainage lines where fluid is transported by gravity, and to the method of manufacturing said pipe. The pipe subject to the invention incorporates guiding surface elements extending along the pipe axis and positioned regularly or semi-regularly on the inner surface, which are structured to enable controlled guidance of the fluid along the inner surface of the pipe. This inner surface geometry is designed to direct the flow behavior solely through the pipe geometry, without the involvement of external energy, mechanical parts, or moving components. The invention also encompasses a manufacturing method for producing a drainage pipe with the aforementioned internal surface geometry, either as a single piece or in multiple pieces, using extrusion, molding, or similar thermoplastic forming methods.

Description

1 TARIFF DRAINAGE WITH PASSIVE FLOW-DIRECTED INTERNAL SURFACE GEOMETRY THE PIPE AND ITS MANUFACTURING METHOD Technical Area 5 This invention is used in infrastructure, construction, agriculture and landscaping applications with HDPE, PP or similar materials. Drainage pipes made from thermoplastic materials, especially those with fluid behavior on the inner surface of the pipe. It relates to geometric structures that passively provide direction. State of the Art 10 Existing drainage pipes are generally perforated in structure, with a smooth or corrugated inner surface. where the flow depends only on slope and gravity, and water distribution occurs randomly within the pipe. These are systems. This situation leads to the formation of blind spots in the field, accumulation of mud and particles, and local flooding. It is highly susceptible to installation errors. Current technical solutions do not focus on the flow-directing function of the pipe's inner surface; 15 It is mostly limited to filtration or surface treatments. Purpose of the Invention The purpose of this invention is; The sensor, without involving energy or moving parts, detects through the geometry of the pipe's inner surface, 20 passively directing fluid in specific directions, reducing the risk of clogging, regardless of slope or low gradient. The goal is to provide a new drainage pipe structure and manufacturing method that can operate even on slopes. Explanation of the Figures Figure 1: Schematic cross-section of a drainage pipe with passive flow-directed internal surface geometry 25 Figure 2: Internal surface variant with helically arranged microchannel structure. Figure 3: Segmented (interrupted) microchannel placement variant. Figure 4: Internal surface variant with bidirectional asymmetric orientation surface. Figure 5: Internal surface variant with variable canal depth. Figure 6: Combined internal surface variant using both helical and segmented structures 30 Figure 7: Schematic view of the mandrel (inner mold) used in the production of the invention. Explanation of References in Figures 1 — Drainage pipe body 2 — Guiding microchannel structures 35 3 — Inner surface of the pipe 2 4 — Flow direction / fluid motion 5 h, h₁, h₂ — Microchannel depth / variable depths α — Channel angle p — Spacing / pitch E — Pipe axis Mandrel (Inner Mold) — Mold element that forms the inner surface geometry. 10 Description of the Invention The subject of the invention is a drainage pipe with an asymmetrical microchannel and / or guiding surface on its inner surface. Thanks to their geometries, they prevent the fluid from randomly distributing within the pipe, directing it in specific directions. This allows for concentration. This orientation is based on the boundary layer effect, the principle of least resistance path, and flow velocity. It occurs entirely passively, based on the principles of a feedback mechanism. 15 These physical effects are achieved solely by the pipe's inner surface geometry, without requiring any active control elements. It emerges through this means. Interior Surface Geometry Angled relative to the pipe axis, with variable depth and arrangement, in helical, segmented or combined form. It consists of arranged microchannels and / or guiding surfaces. 20 These structures create a flow direction preference without narrowing the flow cross-section. Production Method The invention is preferably manufactured by extrusion. The inner surface geometry of the pipe is formed via the mandrel (inner die) used in the extrusion line. Mandrel; 25 A non-perfectly symmetrical, active geometric shape containing directional surfaces that determines fluid behavior. It is configured as a control surface. The internal surface geometry can also be achieved using equivalent manufacturing methods other than extrusion. Perforation, surface treatments, and geotextile applications are performed using existing standard methods. It is feasible. 30 How the invention can be applied to industry. The drainage pipe described in this invention is suitable for mass production using existing industrial production infrastructures. It can be manufactured in this way. In the industrial application of the invention; HDPE, PP or similar thermoplastics. Raw materials, standard drainage pipe production lines, existing drilling (perforation), cutting and winding 35 systems are available. To create the guiding geometries located on the inner surface of the pipe, in existing production lines Only the inner mold geometry needs to be adapted. This doesn't affect the outer mold, production speed, or assembly. It does not require a fundamental change in methods. 3 Since the invention does not contain any sensors, power sources, or moving parts, an additional 5% is required after production. It does not require assembly or calibration procedures. For these reasons, the invention is producible on an industrial scale, compatible with existing infrastructures, and economical. It offers a sustainable technical solution and is applicable to industry.

Claims

4 REQUESTS 1. The invention is a drainage pipe, the feature of which is; 5 asymmetrical placement on the inner surface of the pipe, enabling the flow of fluid along the pipe axis. the presence of microchannel and / or guiding surface geometries and these geometries are designed to extend along the inner surface without narrowing the inner flow cross-section of the pipe. It is the structuring.

2. It is a drainage pipe according to Request 1, and its characteristic is; 10 microchannel and / or guide surface geometries at a specific angle (α) with respect to the pipe axis It is the placement of.

3. It is a drainage pipe according to Requirement 2, and its characteristics are as follows: microchannel and / or guide surface geometries having a helical arrangement along the pipe axis that is. 15 4. It is a drainage pipe according to requirement 3, and its characteristics are; Helically arranged microchannels with varying depths (h, h₁, h₂) along the tube It is the fact that.

5. It is a drainage pipe according to Requirement 2, and its characteristics are as follows: The microchannel and / or guide surface geometries must be discontinuous (segmented) along the pipe axis. It is the presence of a settlement.

6. It is a drainage pipe according to requirement 5, and its characteristics are; segmented microchannel structures, according to a specific spacing (p) along the inner surface of the tube It is regulated.

7. It is a drainage pipe according to Claim 1, and its characteristic is; 25 At least two different guides are placed on the inner surface of the pipe, in opposite directions relative to the pipe axis. It is the presence of a surface group.

8. It is a drainage pipe according to Claim 1, and its characteristics are; The pipe body must be made of HDPE, PP, or a similar thermoplastic material.

9. It is a drainage pipe according to Claim 1, and its characteristic is; 30 Multiple drainage holes on the circumferential surface of the pipe body allow fluid to be discharged to the external environment. It contains (perforations).

10. The invention is a method for manufacturing a drainage pipe, as described in claim 1, and its characteristic is; Molten thermoplastic raw material forms asymmetric microchannels and / or guides on the inner surface of the pipe. Using an internal mold (mandrel) structured to create surface geometries, pipe 5 It involves the step of shaping it into its final form.

11. This is a drainage pipe manufacturing method according to Requirement 10, and its characteristics are: The shaping process is carried out using the extrusion method.

12. This is a drainage pipe manufacturing method according to Requirement 10, and its characteristics are: The inner surface geometry of the pipe, the surface geometry of the inner die (mandrel) used in the extrusion line 10 It is created in a single step through this method.

13. This is a drainage pipe manufacturing method according to Requirement 10, and its characteristics are: Drainage holes (perforations) are made on the circumferential surface of the pipe body after the shaping process. It includes the opening step.

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