Embedded double-flat-wall hole net steel belt winding drainage pipe

Abstract

The utility model relates to the technical field of drain pipes, in particular to an embedded double-flat-wall hole net steel belt winding drain pipe, which comprises an outer layer, an inner layer, a steel belt winding layer, a steel belt winding layer, a steel belt winding layer and a steel belt winding layer, the inner layer is of a spiral winding structure with a rectangular section and wraps the inner side of the outer layer; the steel belt framework is arranged between the outer layer and the inner layer; the perforated steel belt is embedded in the lower end of the inner layer; and the stainless steel strip is embedded in the outer layer. The perforated steel belt and the inner layer are used in an embedded and matched mode, the double functions of water flow permeation and structure strengthening are achieved, the drainage efficiency is improved, the compression resistance of the lower portion of the pipeline is enhanced, and the problem that in the prior art, a drainage pipe is prone to local stress concentration due to unsmooth seepage under dynamic loads is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of drainage pipe technology, specifically to an embedded double-flat-wall perforated steel strip wound drainage pipe. Background Technology

[0002] With the acceleration of urbanization, the demand for underground drainage pipe networks is increasing, placing higher requirements on the strength, durability, and drainage efficiency of drainage pipes. Traditional drainage pipes need to operate stably for a long time under complex geological conditions, high external pressure loads, and corrosive environments, while also considering ease of construction and economy. Steel-reinforced plastic drainage pipes, due to their advantages such as lightweight, high strength, and corrosion resistance, have been widely used in municipal drainage, highway and railway culverts, and industrial wastewater discharge.

[0003] Although existing steel-reinforced plastic drainage pipes have a certain ring stiffness, the interfacial bonding strength between the steel strip and the plastic layer is prone to decay when subjected to long-term dynamic loads, leading to the risk of structural delamination and affecting the overall load-bearing capacity of the pipeline. This defect may accelerate the structural damage of the pipeline, especially under conditions of frequent fluctuations in groundwater level or uneven soil settlement. Utility Model Content

[0004] The purpose of this utility model is to provide an embedded double-flat-wall perforated 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] An embedded double-flat-wall perforated steel strip wound drainage pipe, comprising:

[0007] The outer layer has a cylindrical structure with a smooth outer wall and spiral ribs on the inner wall.

[0008] The inner layer is a helical winding structure with a rectangular cross-section, which covers the inner side of the outer layer;

[0009] A steel frame is installed between the outer and inner layers;

[0010] Perforated steel strip, embedded in the lower end of the inner layer;

[0011] Stainless steel strip, embedded in the inner part of the outer layer.

[0012] Preferably, the inner layer includes

[0013] The main body is rectangular, with a cavity in the middle and protrusions on both sides in the middle.

[0014] The upper extension and the lower extension extend outward from the upper and lower ends of the rectangular body, respectively.

[0015] Preferably, the upper end of the steel strip skeleton abuts against the inner sidewall of the outer layer and is separated by a spiral protrusion, and its lower end is turned outward to form a barbed hook buckle, which is snapped together with the side of the boss.

[0016] Preferably, it also includes an adhesive layer that fills the spiral winding seam of the inner layer and covers the root of the barbed buckle portion of the steel strip skeleton.

[0017] Preferably, the protrusion height of the spiral rib is 1-3mm, and its contact surface with the upper end of the steel strip skeleton is an inclined surface or an arc-shaped surface.

[0018] Preferably, the holes in the perforated steel strip are circular or oblong, with a diameter of 5–15 mm and an opening rate of 20%–40%.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This embedded double-wall perforated steel strip wound drainage pipe achieves the dual functions of water flow infiltration and structural reinforcement through the use of perforated steel strips and the embedded inner layer. It not only improves drainage efficiency but also enhances the pressure resistance of the lower part of the pipe, effectively solving the problem of local stress concentration caused by poor seepage under dynamic load in existing drainage pipes.

[0021] 2. This embedded double-wall perforated steel strip wound drainage pipe, through the use of stainless steel strips and the outer layer of embedded steel strips, significantly improves the ring stiffness and corrosion resistance of the pipe, solves the interface delamination problem caused by steel strip corrosion in corrosive environments of traditional steel strip reinforced plastic drainage pipes, and thus extends the service life of the pipe. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall main structure of this utility model;

[0023] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0024] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 For the present utility model Figure 2 Enlarged diagram of point B in the middle.

[0026] In the diagram: 1. Outer layer; 2. Spiral protrusion; 3. Inner layer; 301. Rectangular main body; 302. Upper extension; 303. Lower extension; 311. Cavity; 4. Steel strip skeleton; 401. Barbed buckle; 5. Perforated steel strip; 6. Stainless steel strip; 7. Adhesive layer; 8. Boss. Detailed Implementation

[0027] 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.

[0028] like Figures 1-4 As shown, this utility model provides a technical solution:

[0029] An embedded double-walled perforated steel strip wound drainage pipe includes an outer layer 1, which is a cylindrical structure with a smooth outer wall and spiral protrusions 2 on the inner wall. The protrusions of the spiral protrusions 2 are 1-3 mm high, and their contact surfaces with the upper end of the steel strip skeleton 4 are inclined or arc-shaped. An inner layer 3 is a spiral wound structure with a rectangular cross-section, covering the inner side of the outer layer 1. The inner layer 3 includes a rectangular main body 301 with a cavity 311 in the middle and protrusions 8 on both sides in the middle. An upper extension 302 and a lower extension 303 extend outward from the upper and lower ends of the rectangular main body 301, respectively. A steel strip skeleton is also included. 4. Located between the outer layer 1 and the inner layer 3, the upper end of the steel strip skeleton 4 abuts against the inner sidewall of the outer layer 1 and is separated by the spiral protrusion 2. Its lower end is turned outward to form a barbed hook buckle part 401, which is connected to the side of the boss 8 by a buckle. It also includes an adhesive layer 7, which fills the spiral winding seam of the inner layer 3 and covers the root of the barbed hook buckle part 401 of the steel strip skeleton 4. A perforated steel strip 5 is embedded in the lower end of the inner layer 3. The holes of the perforated steel strip 5 are round or oblong, with a hole diameter of 5 to 15 mm and an opening rate of 20% to 40%. A stainless steel strip 6 is embedded in the interior of the outer layer 1.

[0030] In this embodiment, the perforated steel strip 5 and the inner layer 3 are used together to achieve the dual functions of water flow infiltration and structural reinforcement. This not only improves drainage efficiency but also enhances the compressive strength of the lower part of the pipe, effectively solving the problem of local stress concentration caused by poor seepage under dynamic load in the prior art.

[0031] Furthermore, by using stainless steel strip 6 in conjunction with the outer layer 1, the ring stiffness and corrosion resistance of the pipe are significantly improved, solving the problem of interface delamination caused by steel strip corrosion in corrosive environments in traditional steel strip reinforced plastic drainage pipes, thereby extending the service life of the pipe.

[0032] Working principle: The cylindrical structure of the outer layer 1 forms a mechanical engagement with the inclined or arc-shaped contact surface at the upper end of the steel strip skeleton 4 through the spiral protrusions 2 set on the inner wall. At the same time, the inner layer 3 achieves bidirectional locking through the protrusions 8 in the middle of both sides of the rectangular main body 301 and the outward-turned hook buckle part 401 at the lower end of the steel strip skeleton 4. After curing, the adhesive layer 7 fills the spiral winding seam of the inner layer 3 and covers the root of the hook buckle part 401 to form a composite fixation. The perforated steel strip 5 is embedded in the lower end of the inner layer 3 and achieves the dual functions of water flow infiltration and structural reinforcement through circular or oblong holes with a diameter of 5-15mm. The stainless steel strip 6 is embedded in the outer layer 1 to provide ring stiffness support. The overall structure reduces frictional resistance through the smooth outer wall surface of the outer layer 1, disperses radial pressure through the rectangular cross-section spiral winding structure of the inner layer 3, and resists circumferential deformation through the three-dimensional truss effect of the steel strip skeleton 4. Finally, a composite pipeline system with high ring stiffness, impact resistance, drainage efficiency and corrosion resistance is formed.

[0033] 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. An embedded double-wall perforated steel strip wound drainage pipe, characterized in that: include The outer layer (1) is a cylindrical structure with a smooth outer wall and a spiral protrusion (2) on the inner wall. The inner layer (3) is a helical winding structure with a rectangular cross section, which covers the inner side of the outer layer (1); A steel strip frame (4) is set between the outer layer (1) and the inner layer (3); A perforated steel strip (5) is embedded in the lower end of the inner layer (3); Stainless steel strip (6) is embedded inside the outer layer (1).

2. The embedded double-flat-wall perforated steel strip wound drainage pipe according to claim 1, characterized in that: The inner layer (3) includes The rectangular body (301) has a cavity (311) in the middle and protrusions (8) on both sides in the middle. The upper extension (302) and the lower extension (303) extend outward from the upper and lower ends of the rectangular body (301), respectively.

3. The embedded double-wall perforated steel strip wound drainage pipe according to claim 2, characterized in that: The upper end of the steel strip skeleton (4) abuts against the inner sidewall of the outer layer (1) and is separated by the spiral protrusion (2). Its lower end is turned outward to form a barbed hook buckle (401) which is buckled to the side of the boss (8).

4. The embedded double-flat-wall perforated steel strip wound drainage pipe according to claim 3, characterized in that: It also includes an adhesive layer (7), which fills the spiral winding seam of the inner layer (3) and covers the root of the barbed snap part (401) of the steel strip skeleton (4).

5. The embedded double-flat-wall perforated steel strip wound drainage pipe according to claim 1, characterized in that: The spiral protrusion (2) has a protrusion height of 1-3 mm, and its contact surface with the upper end of the steel strip skeleton (4) is a slope or an arc surface.

6. The embedded double-wall perforated steel strip wound drainage pipe according to claim 1, characterized in that: The holes in the perforated steel strip (5) are circular or oblong, with a diameter of 5-15 mm and an opening rate of 20%-40%.

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