Composite steel belt skeleton polyethylene pipe

Abstract

The utility model provides a polyethylene pipe with a composite steel belt framework, which belongs to the technical field of polyethylene pipes and comprises an inner polyethylene layer, a composite steel belt, a first resin layer and an outer polyethylene layer which are sequentially arranged from inside to outside, and the strip-shaped steel belt is wound on the surface layer of the inner polyethylene layer at a first preset spiral interval to form the steel belt framework. The first resin layer is shaped on the surface layer of the steel belt framework, and the outer polyethylene layer is arranged on the surface layer of the first resin layer; the composite steel belt comprises a steel belt body and at least one folding part, the folding part is connected with the steel belt body, and an open cavity and / or a closed cavity are / is formed between the folding part and the steel belt body. The compressive strength of the large-diameter polyethylene pipe is greatly enhanced, the composite steel belt is arranged in the large-diameter polyethylene pipe, the composite steel belt is provided with the arched folding part, and the compressive strength of the large-diameter polyethylene pipe provided with the composite steel belt is about 2.6 times that of a common large-diameter polyethylene pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of polyethylene pipes, in particular to a composite steel belt skeleton polyethylene pipe. Background Art

[0002] With technological advancements and industrial development, polyethylene composite pipes are increasingly being used across a wide range of industries, thanks to their excellent corrosion resistance, high temperature resistance, and impact resistance. However, existing polyethylene composite pipes also have certain drawbacks. Some large-diameter polyethylene composite pipes are more susceptible to localized deformation when subjected to uneven external pressure, particularly during storage and transportation. Improper stacking or compression by heavy objects can easily lead to pipe flattening or deformation.

[0003] In order to enhance the strength of the polyethylene composite pipe, steel belts, steel meshes, etc. are lined inside the pipe. For example, the utility model patent with patent number CN202221963299.7 discloses a perforated steel belt polyethylene composite pipe. By setting a perforated steel belt pipe body in the center of the inner side of the outer pipe body and using the perforated steel belt as a liner, the strength of the pipe body is effectively enhanced.

[0004] However, whether by sleeve installation or hoop wrapping, the mesh steel belt is set in the inner center of the outer pipe body, the manufacturing process is complicated and the production cost is high. At the same time, the large-diameter polyethylene composite pipe produced is not only heavy in weight but also has low overall strength due to the addition of a large number of mesh steel belts. Utility Model Content

[0005] Based on this, the utility model provides a new type of steel belt skeleton polyethylene composite pipe to solve the technical problem existing in the prior art that the existing large-diameter polyethylene composite pipe is not only heavy in weight but also has low overall strength due to the addition of a large number of perforated steel belts.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] A composite steel belt skeleton polyethylene pipe comprises an inner polyethylene layer, a composite steel belt, a first resin layer and an outer polyethylene layer arranged in sequence from the inside to the outside, the composite steel belt is wound on the surface of the inner polyethylene layer with a first preset spiral pitch to form a steel belt skeleton, the first resin layer is fixed on the surface of the steel belt skeleton, and the outer polyethylene layer is arranged on the surface of the first resin layer; the composite steel belt comprises a steel belt body and at least one folded portion, the folded portion is connected to the steel belt body, and an open cavity and / or a closed cavity is formed between the folded portion and the steel belt body.

[0008] Preferably, an open cavity is formed between the folded portion and the steel strip body.

[0009] Preferably, a closed cavity is formed between the folded portion and the steel strip body.

[0010] Preferably, the folded portion is in a V-shape or a U-shape.

[0011] Preferably, two groups of folding portions are provided.

[0012] Preferably, the outer surface of the inner polyethylene layer is provided with a groove at a second preset spiral pitch, the second preset spiral pitch is the same as the first preset spiral pitch, and the folded portion fits in the groove.

[0013] Preferably, the second preset spiral pitch is 3 mm-9 mm.

[0014] Preferably, the composite steel strip is a galvanized steel strip.

[0015] Preferably, it also includes a steel mesh and a second resin layer. The steel mesh is wrapped around the surface of the first resin layer to form a steel mesh skeleton. The second resin layer is formed on the surface of the steel belt skeleton. The outer polyethylene layer is arranged on the surface of the second resin layer.

[0016] Compared with the prior art, the present invention has at least the following advantages:

[0017] (1) The compressive strength of the large-diameter polyethylene pipe is greatly enhanced by arranging the composite steel strip in the large-diameter polyethylene pipe, and the composite steel strip has a bowed folded portion, and an open cavity and / or a closed cavity is formed between the folded portion and the steel strip body, which is convenient for spiral winding in the large-diameter polyethylene pipe, and the hollow folded portion can greatly enhance the compressive strength of the large-diameter polyethylene pipe. The compressive strength of the large-diameter polyethylene pipe by arranging the composite steel strip is about 2.6 times that of the ordinary large-diameter polyethylene pipe.

[0018] (2) The large-diameter polyethylene composite pipe is light in weight and easy to transport within the same unit volume. Since the composite steel strip is wound on the surface of the inner polyethylene layer at a preset spiral pitch, the composite steel strip is not completely covered on the surface of the inner polyethylene layer. This improves the strength of the large-diameter polyethylene composite pipe while reducing its weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an axonometric drawing of a composite steel belt skeleton polyethylene pipe.

[0020] Figure 2 This is the main view of a composite steel belt skeleton polyethylene pipe.

[0021] Figure 3 This is the first schematic diagram of the composite steel strip.

[0022] Figure 4 Schematic diagram of the open cavity of the folded part.

[0023] Figure 5 Schematic diagram of the closed cavity of the folded portion.

[0024] Figure 6 This is the second schematic diagram of the composite steel strip.

[0025] In the figure: inner polyethylene layer 100, groove 110, composite steel belt 200, steel belt body 210, folded portion 220, open cavity 230, closed cavity 240, first resin layer 300, steel wire mesh 400, second resin layer 500, outer polyethylene layer 600. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The following will further describe the technical solution of the present invention in conjunction with the drawings of the embodiments of the present invention, and the present invention is not limited to the following specific implementation methods.

[0027] It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", etc. indicating an orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0028] Please see Figures 1 to 6A composite steel belt skeleton polyethylene pipe comprises an inner polyethylene layer 100, a composite steel belt 200, a first resin layer 300 and an outer polyethylene layer 600 arranged in sequence from the inside to the outside, the composite steel belt 200 is wound on the surface of the inner polyethylene layer 100 with a first preset spiral pitch to form a steel belt skeleton, the first resin layer 300 is fixed on the surface of the steel belt skeleton, and the outer polyethylene layer 600 is arranged on the surface of the first resin layer 300; the composite steel belt 200 comprises a steel belt body 210 and at least one folded portion 220, the folded portion 220 is connected to the steel belt body 210, and an open cavity 230 and / or a closed cavity 240 is formed between the folded portion 220 and the steel belt body 210, the steel belt body 210 is attached to the inner polyethylene layer 100, and the folded portion 220 protrudes toward the side away from the inner polyethylene layer 100.

[0029] The effect achieved

[0030] (1) The compressive strength of the large-diameter polyethylene pipe is greatly enhanced by arranging the composite steel strip 200 in the large-diameter polyethylene pipe, and the composite steel strip 200 has a bowed folded portion 220, and an open cavity 230 and / or a closed cavity 240 are formed between the folded portion 220 and the steel strip body 210, which is convenient for spiral winding in the large-diameter polyethylene pipe, and the hollow folded portion 220 can greatly enhance the compressive strength of the large-diameter polyethylene pipe. The compressive strength of the large-diameter polyethylene pipe by arranging the composite steel strip 200 is about 2.6 times that of an ordinary large-diameter polyethylene pipe.

[0031] (2) The large-diameter polyethylene composite pipe is light in weight and easy to transport within the same unit volume. Since the composite steel strip 200 is wound on the surface of the inner polyethylene layer 100 at a preset spiral pitch, the composite steel strip 200 is not completely covered on the surface of the inner polyethylene layer 100. This improves the strength of the large-diameter polyethylene composite pipe while reducing its weight.

[0032] For details, see Figure 3 and Figure 4 An open cavity 230 is formed between the folded portion 220 and the steel strip body 210. Compared to the closed cavity 240, the open cavity 230 is more likely to deform slightly when the large-diameter polyethylene composite pipe needs to be slightly bent, thereby achieving slight bending of the pipe. However, the compressive strength of the pipe in the open cavity 230 is lower than that of the closed cavity 240. The large-diameter polyethylene composite pipe with the open cavity 230 is suitable for laying long-distance straight pipes.

[0033] For details, see Figure 3 and Figure 5A closed cavity 240 is formed between the folded portion 220 and the steel strip body 210. Compared to the open cavity 230, the closed cavity 240 is subjected to greater force when the large-diameter polyethylene composite pipe is bent at a corner, and the compressive strength of the pipe with the closed cavity 240 is higher than that of the pipe with the open cavity 230. However, the large-diameter polyethylene composite pipe with the closed cavity 240 is not conducive to pipe bending. The large-diameter polyethylene composite pipe with the closed cavity 240 is suitable for laying curved pipelines.

[0034] Preferably, the first preset spiral pitch is 3mm-9mm. While enhancing the strength of the large-diameter polyethylene composite pipe, setting the first preset spiral pitch of 3mm-9mm is more conducive to achieving slight bending of the large-diameter polyethylene composite pipe without damaging the pipe after bending.

[0035] Preferably, the composite steel strip 200 has a width of 6 mm to 8 mm and a thickness of 1.0 mm to 1.5 mm. This facilitates the rotational wrapping of the composite steel strip 200 around the surface of the large-diameter inner polyethylene layer 100. Furthermore, the wider composite steel strip 200 facilitates the provision of the folded portion 220, further enhancing the compressive strength of the large-diameter polyethylene composite pipe.

[0036] Furthermore, the folded portion 220 is in a V-shape or a U-shape. The composite steel strip 200 formed by the V-shaped or U-shaped folded portion 220 has high compressive strength and has a rigidity-enhancing and reinforcing effect.

[0037] Furthermore, the folded portion 220 is provided with two groups, so as to further enhance the compressive strength of the large-diameter polyethylene pipe.

[0038] In a possible embodiment, there are two ways of rotating and winding the composite steel strip 200. One way is that the folded portion 220 is away from the inner polyethylene layer 100, so that the folded portion 220 is convex upward. Figure 6 The outer surface of the inner polyethylene layer 100 is provided with grooves 110 at a second predetermined spiral pitch, which is the same as the first predetermined spiral pitch. The folded portion 220 fits within the grooves 110. The folded portion 220 is close to or in contact with the inner polyethylene layer 100, forming a downwardly protruding shape. This rotary winding method can lock the folded portion 220 within the grooves 110, allowing the composite steel strip 200 to be tightly spirally wound around the inner polyethylene layer 100, preventing the composite steel strip 200 from falling off.

[0039] Specifically, the second preset spiral pitch is 3 mm to 9 mm, which facilitates the engagement of the folded portion 220 with the groove 110 and allows the large-diameter polyethylene composite pipe to be slightly bent without damaging the pipe.

[0040] Furthermore, the composite steel strip 200 is a galvanized steel strip. Compared with ordinary steel strips, galvanized steel strips have strong corrosion resistance, good tensile properties and fire resistance.

[0041] For further information, see Figure 1 A composite steel belt 200 skeleton large-diameter polyethylene pipe also includes a steel mesh 400 and a second resin layer 500. The steel mesh 400 is wrapped around the surface of the first resin layer 300 to form a steel mesh 400 skeleton. The second resin layer 500 is fixed on the surface of the steel belt skeleton. The outer polyethylene layer 600 is disposed on the surface of the second resin layer 500. The composite steel belt 200 skeleton and the steel mesh 400 skeleton are arranged within the large-diameter polyethylene composite pipe to achieve dual rigidity reinforcement, improving the overall structural strength of the large-diameter polyethylene composite pipe.

[0042] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to provide an exhaustive list of all implementation methods. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A composite steel belt skeleton polyethylene pipe, characterized in that: It includes an inner polyethylene layer, a composite steel belt, a first resin layer and an outer polyethylene layer arranged in sequence from the inside to the outside. The composite steel belt is wound on the surface of the inner polyethylene layer with a first preset spiral pitch to form a steel belt skeleton. The first resin layer is fixed on the surface of the steel belt skeleton, and the outer polyethylene layer is arranged on the surface of the first resin layer. The composite steel belt includes a steel belt body and at least one folded portion, the folded portion is connected to the steel belt body, and an open cavity and / or a closed cavity is formed between the folded portion and the steel belt body.

2. A composite steel-strip skeleton polyethylene pipe according to claim 1, characterized in that: An open cavity is formed between the folded portion and the steel strip body.

3. The composite steel-strip skeleton polyethylene pipe according to claim 1, characterized in that: A closed cavity is formed between the folded portion and the steel strip body.

4. The composite steel-strip skeleton polyethylene pipe according to claim 1, characterized in that: The folded portion is in one of a V-shape and a U-shape.

5. The composite steel-strip skeleton polyethylene pipe according to claim 4, characterized in that: The folding parts are provided in two groups.

6. The composite steel-strip skeleton polyethylene pipe according to claim 1, characterized in that: The outer surface of the inner polyethylene layer is provided with a groove at a second preset spiral pitch, the second preset spiral pitch is the same as the first preset spiral pitch, and the folded portion fits in the groove.

7. The composite steel-strip skeleton polyethylene pipe according to claim 6, characterized in that: The second preset spiral pitch is 3mm-9mm.

8. The composite steel-strip skeleton polyethylene pipe according to claim 1, characterized in that: The composite steel strip is a galvanized steel strip.

9. The composite steel-strip skeleton polyethylene pipe according to claim 1, characterized in that: It also includes a steel mesh and a second resin layer. The steel mesh is wrapped around the surface of the first resin layer to form a steel mesh skeleton. The second resin layer is formed on the surface of the steel belt skeleton. The outer polyethylene layer is arranged on the surface of the second resin layer.

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