High-ring-stiffness steel belt reinforced winding pipe

Abstract

The utility model discloses a high-ring-stiffness steel belt reinforced winding pipe, and belongs to the field of winding pipes. A high-ring-stiffness steel belt reinforced winding pipe comprises a pipe body, the pipe body comprises a lining layer, a reinforcing layer, an isolation buffer layer and an outer protective layer, the reinforcing layer comprises a steel belt and a steel ring, a reinforcing structure is arranged at the edge position of the steel belt, namely, the face, making contact with the lining layer, of the steel belt, the reinforcing structure is in a sawtooth shape, anchoring holes are formed in the two ends of the steel belt, and anchoring nails are arranged in the anchoring holes; through the reinforcing structure arranged on the steel belt and the zigzag structure, the interlayer contact area is effectively increased, the bonding strength is improved, and steel-plastic debonding is prevented.

Description

Technical Field

[0001] This utility model relates to the field of spiral wound tube technology, and in particular to a high-ring stiffness steel strip reinforced spiral wound tube. Background Technology

[0002] Spiral wound pipe is a type of pipe formed by winding material layer by layer through a special process. It has good conveying capacity, corrosion resistance and pressure resistance, and is widely used in municipal engineering, industrial pipelines, cable protection and other fields. Among them, steel strip reinforced spiral wound pipe adds steel strip reinforcement structure to HDPE base material to improve strength and durability, and is often used for high pressure and large diameter pipelines.

[0003] A search revealed Chinese patent application number 201721846687.6, which discloses a steel-reinforced spiral pipe. The pipe includes a body with openings at both ends and a protective edge at one end of each opening. Reinforcing spirals are mounted on the pipe body, and elastic buffer rings are installed between these spirals. A tough mesh layer is installed inside the reinforcing spirals, and a steel ring is installed inside the tough mesh layer. This invention features reinforcing spirals on the pipe body and elastic buffer rings between them. The combination of the elastic buffer rings and the reinforcing spirals significantly increases the pipe's buffering capacity. The elastic buffer rings also increase the tensile strength and recovery ability of the pipe, preventing excessive stretching and breakage, thus extending its service life. Furthermore, the steel rings installed within both the reinforcing spirals and the protective edge increase the overall strength of the pipe.

[0004] Although the aforementioned patent can increase the anti-buffering capacity of the pipe body by combining the buffer ring and the reinforcing winding ring, the insufficient bonding stability between the steel strip and the inner lining layer during use can easily cause interlayer delamination, resulting in a decrease in the service life of the pipe body.

[0005] Therefore, there is an urgent need for high-ring stiffness steel strip reinforced spiral pipes to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to solve the problem of insufficient bonding stability between the steel strip and the inner lining layer in the prior art, which easily leads to interlayer delamination, and to propose a high-ring stiffness steel strip reinforced winding pipe.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A high-ring stiffness steel strip reinforced spiral pipe includes a pipe body, which includes an inner lining layer, a reinforcing layer, an isolation buffer layer, and an outer protective layer. The reinforcing layer includes a steel strip and a steel ring. A reinforcing structure is provided at the edge of the steel strip, i.e., on the surface in contact with the inner lining layer. The reinforcing structure is serrated. Anchor holes are provided at both ends of the steel strip, and anchor nails are provided in the anchor holes.

[0009] As a preferred technical solution of this application, the steel strip is an inverted U-shape.

[0010] As a preferred technical solution of this application, the anchor has an injection hole inside, and the bottom conical end of the anchor has a plurality of outlet holes communicating with the injection hole.

[0011] As a preferred technical solution of this application, the steel rings are intermittently embedded in the inner lining layer, and the outer side of the steel rings is a spirally wound steel strip.

[0012] As a preferred technical solution of this application, the plurality of steel rings are connected by connecting steel wires.

[0013] As a preferred technical solution of this application, the surfaces of the steel strip and the steel ring are pre-coated with an epoxy resin layer.

[0014] As a preferred technical solution of this application, the isolation buffer layer includes an elastic material layer located outside the reinforcement layer.

[0015] Compared with the prior art, this utility model provides a high-ring stiffness steel strip reinforced spiral tube, which has the following beneficial effects:

[0016] 1. This high-ring stiffness steel strip reinforced spiral pipe, through the reinforcement structure set on the steel strip, and the serrated structure, effectively increases the interlayer contact area, improves the bonding strength, and prevents steel-plastic debonding. It solves the problem of insufficient bonding stability between the steel strip and the inner lining layer in the existing technology, which easily leads to interlayer debonding.

[0017] 2. This high-ring stiffness steel strip reinforced spiral tube, through the anchors set at both ends of the steel strip, can fix the two ends of the steel strip to the inner lining layer during use, improve the stability of the connection between the steel strip and the inner lining layer, effectively prevent the steel strip from slipping off, and solve the problem of interface separation between the steel strip and the inner lining layer caused by the difference in thermal expansion coefficient, which leads to a decrease in stiffness in the prior art. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a frontal sectional view of the internal structure of this utility model;

[0020] Figure 3 This is a right-side sectional view of the internal structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the steel strip structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the anchor installation structure of this utility model.

[0023] In the picture:

[0024] 1. Pipe body; 2. Inner lining layer; 3. Steel ring; 4. Connecting steel wire; 5. Steel strip; 6. Injection hole; 7. Isolation and buffer layer; 8. Reinforcing structure; 9. Protective layer; 10. Anchor nail. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. Example 1

[0026] Reference Figures 1-5 A high-ring stiffness steel strip reinforced spiral pipe includes a pipe body 1, which includes an inner lining layer 2, a reinforcing layer, an isolation buffer layer 7, and an outer protective layer 9.

[0027] Among them, the inner lining layer 2 is made of high-density polyethylene (HDPE) or polypropylene (PP) through extrusion molding, with a smooth inner wall to reduce fluid resistance.

[0028] Reinforcing layer: formed by spiral or cross-winding of galvanized steel strip or stainless steel strip, with epoxy resin pre-coated on the surface of the steel strip to enhance adhesion to the inner lining layer;

[0029] 7. Isolation and buffer layer: An elastic material layer such as rubber or foamed polyethylene located outside the steel strip layer, used to absorb external impacts and reduce the contact between the steel strip and the external environment.

[0030] Outer protective layer 9: Wrapped with weather-resistant materials such as polyurethane or modified PVC, it has the properties of UV resistance and chemical corrosion resistance;

[0031] The reinforcing layer includes a steel strip 5 and a steel ring 3. The steel strip 5 is an inverted U-shape or V-shape, and a reinforcing structure 8 is provided at the edge of the steel strip 5, i.e. the surface in contact with the inner lining layer 2. The reinforcing structure 8 is serrated or wavy. It is drawn as serrated in the attached figure. After being connected with the inner lining layer 2, it effectively increases the interlayer contact area, improves the bonding strength, and prevents the steel and plastic from debonding.

[0032] Anchoring holes are provided at both ends of the steel strip 5, and anchor nails 10 are provided in the anchoring holes. The anchor nails 10 fix the two ends of the steel strip 5, making the connection between the steel strip 5 and the inner lining layer 2 tighter and more stable during use. At the same time, the anchor nail 10 has an injection hole 6 inside, and multiple glue outlet holes communicating with the injection hole 6 are provided on the bottom conical end of the anchor nail 10. After connection, it is convenient to use glue or the like to connect the anchor nail and the inner lining layer, further maintaining the stability of the connection between the steel strip 5 and the inner lining layer 2 and preventing the steel strip from detaching.

[0033] Steel rings 3 are intermittently embedded on the inner lining layer 2. The outer side of the steel rings 3 is a spirally wound steel strip. The steel rings 3 can effectively increase the radial compressive strength of the pipe body and effectively improve the service life of the pipe body. Multiple steel rings 3 are connected by connecting steel wires 4 to fix the steel rings and increase their compressive strength.

[0034] The surfaces of steel strip 5 and steel ring 3 are pre-coated with epoxy resin to enhance adhesion to the inner lining.

[0035] Specifically, when using this high-ring stiffness steel strip reinforced spiral pipe: the inner lining layer 2 is extruded and formed, and multiple connecting steel wires 4 are simultaneously sleeved on the surface of the molten inner lining layer 2 to form steel rings 3, and preheated steel strips 5 are wound around it. The temperature is used to achieve molten bonding between the steel rings, steel strips and inner lining layer. The steel strip layer is pressurized and shaped by a rolling device, and a buffer layer and an outer protective layer are wrapped in sequence. The pipe is cut after cooling.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-ring stiffness steel strip reinforced spiral wound pipe, comprising a pipe body (1), wherein the pipe body (1) comprises an inner lining layer (2), a reinforcing layer, an isolation buffer layer (7), and an outer protective layer (9), characterized in that, The reinforcing layer includes a steel strip (5) and a steel ring (3). The edge of the steel strip (5) is provided with a reinforcing structure (8) on the surface that contacts the inner lining layer (2). The reinforcing structure (8) is serrated. Anchor holes are provided at both ends of the steel strip (5), and anchor nails (10) are provided in the anchor holes.

2. The high-ring stiffness steel strip reinforced spiral wound tube according to claim 1, characterized in that, The steel strip (5) is an inverted U-shape.

3. The high-ring stiffness steel strip reinforced spiral wound tube according to claim 1, characterized in that, The anchor (10) has an injection hole (6) inside, and the bottom conical end of the anchor (10) has multiple outlet holes that communicate with the injection hole (6).

4. The high-ring stiffness steel strip reinforced spiral wound tube according to claim 1, characterized in that, The steel rings (3) are intermittently embedded on the inner lining layer (2), and the outer side of the steel rings (3) is a spirally wound steel strip.

5. The high-ring stiffness steel strip reinforced spiral wound tube according to claim 4, characterized in that, The multiple steel rings (3) are connected by connecting steel wires (4).

6. The high-ring stiffness steel strip reinforced spiral wound tube according to claim 1, characterized in that, The surfaces of the steel strip (5) and the steel ring (3) are pre-coated with an epoxy resin layer.

7. The high-ring stiffness steel strip reinforced spiral wound tube according to claim 1, characterized in that, The isolation buffer layer (7) includes an elastic material layer located outside the reinforcement layer.

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