A new type of steel lined polyurethane composite pipe

Abstract

The utility model relates to the field of composite pipe for grain feed production discloses a new type steel lining polyurethane composite pipe, including connecting piece, steel lining net structure, polyurethane layer, three mutual combination use play a role, steel lining polyurethane composite pipe does not need sandblasting or daub adhesion promoter before being compounded with polyurethane layer, the diamond mesh of steel lining net structure can make the polyurethane layer between the mesh melt into one and increase the adhesion of polyurethane layer on steel lining polyurethane composite pipe through mesh, also will not cause the polyurethane layer to slide down due to the relatively smooth traditional steel pipe inner wall, is not influenced by traditional steel pipe roundness and inside and outside wall coaxality factor, and the thickness of polyurethane layer is controllable, and steel lining net structure is covered by polyurethane layer, avoids the rust, also need not to carry out the special treatment of antirust.

Description

Technical Field

[0001] This utility model relates to the field of composite pipes used in grain and feed production, specifically a novel steel-lined polyurethane composite pipe. Background Technology

[0002] Steel-lined polyurethane composite pipe is a type of pipe that combines the high strength of steel pipe with the excellent wear resistance and corrosion resistance of polyurethane. Its core structure consists of an outer steel pipe that provides mechanical support, and an inner polyurethane elastomer cast using a special process as a wear-resistant and corrosion-resistant lining. This composite design makes it perform exceptionally well under harsh working conditions. For example, in the transportation of particulate materials in industries such as power, coal, and mining, its wear-resistant life can be dozens of times that of ordinary steel pipes.

[0003] Traditional steel-lined polyurethane composite pipes used in grain and feed production require cleaning of the inner wall of the steel pipe, sandblasting, and application of an adhesive to enhance the adhesion of the polyurethane layer before laminating with the polyurethane layer. This process is complex.

[0004] Traditional steel-lined polyurethane composite pipes used in grain and feed production have exposed steel pipes on the outside. To prevent corrosion, their surfaces need to be treated with rust prevention or made of stainless steel, making maintenance cumbersome.

[0005] Traditional steel-lined polyurethane composite pipes used in grain and feed production are prone to polyurethane layer detachment during use because they are attached to the relatively smooth inner wall of the steel pipe. Furthermore, the thickness consistency of traditional steel-lined polyurethane composite pipes cannot be guaranteed due to factors such as the roundness of the steel pipe and the coaxiality of the inner and outer walls. Utility Model Content

[0006] In view of the shortcomings of the existing technology, this utility model provides a novel steel-lined polyurethane composite pipe to solve the above problems.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0008] A novel steel-lined polyurethane composite pipe includes connectors, a steel-lined mesh structure, and a polyurethane layer. Connectors are located at both ends of the steel-lined mesh structure. The polyurethane layer covers the steel-lined mesh structure, with the mesh structure positioned centrally within the polyurethane layer. Both sides of the polyurethane layer extend to the end faces of the connectors. The mesh of the steel-lined mesh structure is arranged in a diamond-shaped array in a ring. The connectors and the polyurethane layer are coaxially distributed. Before laminating with the polyurethane layer, the steel-lined polyurethane composite pipe does not require sandblasting or the application of an adhesive. The diamond-shaped mesh of the steel-lined mesh structure allows the polyurethane layers to fuse together, increasing the adhesion of the polyurethane layer to the steel-lined polyurethane composite pipe. It also prevents the polyurethane layer from slipping due to the relatively smooth inner wall of traditional steel pipes, and is unaffected by the roundness and coaxiality of the inner and outer walls of traditional steel pipes. The thickness of the polyurethane layer is controllable. The steel-lined mesh structure, covered by the polyurethane layer, avoids corrosion and eliminates the need for special rust-prevention treatment.

[0009] Preferably, the connector has bolt holes.

[0010] Preferably, the connector is either a flange or a clamp.

[0011] Preferably, the steel-lined mesh structure and the polyurethane layer are also coaxially distributed.

[0012] Compared to existing technologies, this utility model discloses a novel steel-lined polyurethane composite pipe, comprising connectors, a steel-lined mesh structure, and a polyurethane layer, which work together to achieve their intended function.

[0013] Before laminating with the polyurethane layer, the steel-lined polyurethane composite pipe does not require sandblasting or application of adhesive. The diamond-shaped mesh of the steel lining allows the polyurethane layers to fuse together through the mesh, increasing the adhesion of the polyurethane layer to the steel-lined polyurethane composite pipe.

[0014] The polyurethane layer will not slip due to the relatively smooth inner wall of the traditional steel pipe, and it is not affected by the roundness and coaxiality of the inner and outer walls of the traditional steel pipe. The thickness of the polyurethane layer is controllable.

[0015] The steel-lined mesh structure is covered with a polyurethane layer, which prevents rust and eliminates the need for special rust-proofing treatment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the novel steel-lined polyurethane composite pipe of this utility model;

[0017] Figure 2 This is a schematic diagram of the combination of the connector and the steel mesh structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the prior art in Comparative Example 1 of this utility model. Detailed Implementation

[0019] 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.

[0020] Example 1

[0021] A novel steel-lined polyurethane composite pipe includes connectors 1, a steel-lined mesh structure 2, and a polyurethane layer 3. Connectors 1 are located at both ends of the steel-lined mesh structure 2. The polyurethane layer 3 covers the steel-lined mesh structure 2, with the steel-lined mesh structure 2 positioned centrally within the polyurethane layer 3. Both sides of the polyurethane layer 3 extend to the end faces of the connectors 1. The mesh of the steel-lined mesh structure 2 is arranged in a diamond-shaped array in a ring. The connectors 1 and the polyurethane layer 3 are coaxially distributed. Bolt holes are provided on the connectors 1. The connectors 1 can be either flanges or clamps; in this design, flanges are preferred. The steel-lined mesh structure 2 and the polyurethane layer 3 are also coaxially distributed. The polyurethane layer 3 is made of polyurethane, formed by heating and curing molten polyurethane prepolymer and vulcanizing agents. The central part of the polyurethane layer 3, the middle layer, is a steel-lined mesh structure 2, made of rolled steel wire mesh. The aforementioned diamond-shaped array of circularly distributed mesh openings represents the optimal wire mesh size determined through comprehensive experiments, allowing the polyurethane layers to bond together more effectively and ensuring overall strength. Specific mesh shapes, overall diameters, and lengths can be determined based on actual production requirements.

[0022] Comparative Example 1

[0023] like Figure 3 As shown in the figure, reference numeral 4 represents a connector of the prior art, reference numeral 5 represents a steel pipe of the prior art, and reference numeral 6 represents a polyurethane layer of the prior art. In the process of using traditional steel-lined polyurethane composite pipes, since they are attached to the relatively smooth inner wall of the steel pipe, the polyurethane layer is prone to detachment. In addition, due to the influence of the roundness of the steel pipe and the coaxiality of the inner and outer walls, the thickness consistency of traditional steel-lined polyurethane composite pipes cannot be guaranteed. Therefore, the technical effect is not as good as the structure in embodiment 1 of this solution.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel steel-lined polyurethane composite pipe, characterized in that: The device includes a connector (1), a steel mesh structure (2), and a polyurethane layer (3). The steel mesh structure (2) has connectors (1) at both ends. The polyurethane layer (3) covers the steel mesh structure (2) and is located in the center of the polyurethane layer (3). The two sides of the polyurethane layer (3) extend to the end face of the connector (1). The mesh of the steel mesh structure (2) is a diamond array in a ring. The connector (1) and the polyurethane layer (3) are coaxial.

2. The novel steel-lined polyurethane composite pipe according to claim 1, characterized in that: The connector (1) is provided with bolt holes.

3. The novel steel-lined polyurethane composite pipe according to claim 2, characterized in that: The connector (1) can be either a flange or a clamp.

4. The novel steel-lined polyurethane composite pipe according to claim 1, characterized in that: The steel-lined mesh structure (2) and the polyurethane layer (3) are also coaxially distributed.

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