Double-layer steel hollow hole net steel belt winding drainage pipe

Abstract

The utility model relates to the technical field of drain pipes, in particular to a double-layer steel hollow hole net steel belt winding drain pipe, which comprises an outer layer, an inner layer and an inner layer, the inner layer is of a spiral winding structure with a rectangular section, wraps the inner side of the outer layer and comprises a rectangular main body, and a cavity is formed in the middle; the upper extending part and the lower extending part extend outwards from the upper end face and the lower end face of the rectangular body respectively, and a limiting protrusion is arranged below the upper extending part; the steel belt framework is arranged between the outer layer and the inner layer; and the punching steel belt is embedded in the lower end of the inner layer. The clamping groove structure of the steel belt framework is used in cooperation with the limiting protrusions of the inner layer, so that when external loads are borne, the steel belt framework automatically moves upwards, the steel belt framework and the limiting protrusions form a self-locking structure, relative displacement of the steel belt framework and the pipe body is effectively prevented, and the service life of the pipe body is prolonged. The problem of layering caused by infirm combination of the steel belt and the pipe body in the prior art is solved, and the overall bearing capacity and deformation resistance of the drainage pipe are improved.

Description

Technical Field

[0001] This utility model relates to the field of drainage pipe technology, specifically a double-layer steel hollow mesh steel strip wound drainage pipe. Background Technology

[0002] As an important component of municipal engineering, underground drainage systems, and road drainage facilities, drainage pipes directly affect drainage efficiency and long-term performance due to their structural strength and deformation capacity. Traditional drainage pipes are usually made of a single material, but with increasingly demanding engineering requirements, higher requirements are being placed on the compressive strength, deformation resistance, and durability of drainage pipes.

[0003] Currently, some steel-reinforced drainage pipes improve rigidity by embedding steel strips in the inner or outer layers. However, the combination of steel strips and plastic layers often involves simple wrapping or bonding. When subjected to large radial loads, the steel strips are prone to relative displacement with the pipe body, leading to structural delamination and thus reducing the overall load-bearing capacity of the pipe body. Utility Model Content

[0004] The purpose of this utility model is to provide a double-layer steel hollow mesh steel strip wound drainage pipe to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A double-layer steel hollow mesh steel strip wound drainage pipe, comprising

[0007] The outer layer has a cylindrical structure with a smooth outer wall surface;

[0008] The inner layer is a helical winding structure with a rectangular cross-section, which covers the inner side of the outer layer and includes a rectangular main body with a cavity in the middle;

[0009] The upper extension and the lower extension extend outward from the upper and lower ends of the rectangular body, respectively, with a limiting protrusion provided below the upper extension;

[0010] A steel frame is installed between the outer and inner layers;

[0011] Perforated steel strip, embedded in the lower end of the inner layer;

[0012] Stainless steel strips are embedded inside the outer layer.

[0013] Preferably, the inner wall surface of the outer layer is provided with annular ribs that are adapted to the shape of the upper end of the steel strip skeleton.

[0014] Preferably, the upper end of the steel strip skeleton contacts the annular rib of the outer inner wall, and the lower end is turned outward to form a slot structure.

[0015] Preferably, the distance between the slot structure and the limiting protrusion is 1 to 3 mm.

[0016] Preferably, the perforated steel strip has circular or oblong holes with a diameter of 5-15 mm and an opening rate of 20%-40%.

[0017] Preferably, it also includes an adhesive layer that fills the spiral winding seam of the inner layer and covers the root of the flange of the steel strip skeleton.

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

[0019] 1. This double-layer hollow steel mesh steel strip wound drainage pipe, through the cooperation of the groove structure of the steel strip skeleton and the limiting protrusion of the inner layer, enables the steel strip skeleton to automatically move upward and form a self-locking structure with the limiting protrusion when subjected to external loads. This effectively prevents relative displacement between the steel strip skeleton and the pipe body, solves the problem of delamination caused by the poor bonding between the steel strip and the pipe body in the prior art, and improves the overall load-bearing capacity and deformation resistance of the drainage pipe.

[0020] 2. This double-layer steel hollow mesh steel strip wound drainage pipe, through the tight fit between the outer annular rib and the upper end of the steel strip skeleton, allows the external load to be evenly transferred to the steel strip skeleton, avoiding local stress concentration. At the same time, combined with the reinforcing effect of the stainless steel strip, it significantly improves the compressive strength and long-term stability of the drainage pipe, and is suitable for harsh working conditions such as high fill and soft soil foundation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall main structure of this utility model;

[0022] Figure 2 This is a cross-sectional side view of the present invention;

[0023] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 For the present utility model Figure 2 Enlarged diagram of point B in the middle.

[0025] In the diagram: 1. Outer layer; 2. Inner layer; 201. Rectangular main body; 2011. Cavity; 202. Upper extension; 2021. Limiting protrusion; 203. Lower extension; 3. Steel strip skeleton; 301. Annular rib; 4. Perforated steel strip; 401. Slot structure; 5. Stainless steel strip. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1-4 As shown, this utility model provides a technical solution:

[0028] A double-layer hollow steel mesh spiral drainage pipe includes an outer layer 1, which is a cylindrical structure with a smooth outer wall surface. The inner wall surface of the outer layer 1 is provided with annular ribs 301 that are adapted to the shape of the upper end of the steel strip skeleton 3. The inner layer 2 is a spirally wound structure with a rectangular cross-section, covering the inner side of the outer layer 1. It includes a rectangular body 201 with a cavity 2011 in the middle. An upper extension 202 and a lower extension 203 extend outward from the upper and lower ends of the rectangular body 201, respectively. A limiting protrusion 2021 is provided below the upper extension 202. The steel strip skeleton 3 is set in... Between the outer layer 1 and the inner layer 2, the upper end of the steel strip skeleton 3 contacts the annular rib 301 on the inner wall of the outer layer 1, and the lower end is turned outward to form a groove structure 401. The distance between the groove structure 401 and the limiting protrusion 2021 is 1-3mm. The perforated steel strip 4 is embedded in the lower end of the inner layer 2. The perforated steel strip 4 has a circular or oblong hole with a diameter of 5-15mm and an opening rate of 20%-40%. The stainless steel strip 5 is embedded in the outer layer 1. It also includes an adhesive layer, which fills the spiral winding seam of the inner layer 2 and covers the root of the turned edge of the steel strip skeleton 3.

[0029] In this embodiment, the use of the slot structure 401 of the steel strip skeleton 3 and the limiting protrusion 2021 of the inner layer 2 in cooperation enables the steel strip skeleton 3 to automatically move upward and form a self-locking structure with the limiting protrusion 2021 when subjected to external loads. This effectively prevents the relative displacement between the steel strip skeleton 3 and the pipe body, solves the problem of delamination caused by the poor bonding between the steel strip and the pipe body in the prior art, and improves the overall load-bearing capacity and deformation resistance of the drainage pipe.

[0030] Furthermore, the tight fit between the annular rib 301 of the outer layer 1 and the upper end of the steel strip skeleton 3 allows the external load to be evenly transferred to the steel strip skeleton 3, avoiding local stress concentration. At the same time, combined with the reinforcing effect of the stainless steel strip 5, the compressive strength and long-term stability of the drainage pipe are significantly improved, making it suitable for harsh working conditions such as high fill and soft soil foundation.

[0031] Working principle: When the drain pipe is subjected to external load, the outer layer 1 transmits pressure to the upper end of the steel strip skeleton 3 through the annular rib 301. Under the action of pressure, the steel strip skeleton 3 displaces upward, causing the groove structure 401 at its lower end to gradually approach and eventually engage with the limiting protrusion 2021 of the upper extension 202 of the inner layer 2, forming a self-locking structure to limit the radial deformation of the inner layer 2. At the same time, the perforated steel strip 4 embedded in the lower end of the inner layer 2 mainly plays the role of enhancing the structural rigidity, the stainless steel strip 5 enhances the overall rigidity of the outer layer 1, and the adhesive layer 6 filled in the spiral winding seam forms an integrated structure with the inner layer 2 and the steel strip skeleton 3 after curing, ensuring that each component is subjected to force in a coordinated manner. When the load is removed, the steel strip skeleton 3 returns to its initial position by relying on the elasticity of the material, and the groove structure 401 and the limiting protrusion 2021 separate again, restoring the flexible deformation capability of the pipe.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A double-layer steel hollow mesh steel strip wound drainage pipe, characterized in that: include The outer layer (1) is a cylindrical structure with a smooth outer wall surface; The inner layer (2) is a spiral winding structure with a rectangular cross section, which covers the inner side of the outer layer (1) and includes a rectangular main body (201) with a cavity (2011) in the middle. The upper extension (202) and the lower extension (203) extend outward from the upper and lower ends of the rectangular body (201), respectively, and a limiting protrusion (2021) is provided below the upper extension (202). A steel strip frame (3) is set between the outer layer (1) and the inner layer (2); A perforated steel strip (4) is embedded in the lower end of the inner layer (2); Stainless steel strip (5) is embedded inside the outer layer (1).

2. The double-layer hollow steel mesh spiral wound drainage pipe according to claim 1, characterized in that: The inner wall of the outer layer (1) is provided with an annular rib (301) that matches the shape of the upper end of the steel strip skeleton (3).

3. The double-layer hollow steel mesh steel strip wound drainage pipe according to claim 2, characterized in that: The upper end of the steel strip skeleton (3) contacts the annular rib (301) on the inner wall of the outer layer (1), and the lower end is turned outward to form a slot structure (401).

4. The double-layer hollow steel mesh steel strip wound drainage pipe according to claim 3, characterized in that: The distance between the slot structure (401) and the limiting protrusion (2021) is 1-3 mm.

5. A double-layer hollow steel mesh spiral wound drainage pipe according to claim 1, characterized in that: The perforated steel strip (4) has a circular or oblong hole with a diameter of 5-15 mm and an opening rate of 20%-40%.

6. A double-layer steel hollow mesh steel strip wound drainage pipe according to claim 1, characterized in that: It also includes an adhesive layer that fills the spiral winding seam of the inner layer (2) and covers the root of the flange of the steel strip skeleton (3).

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