Flame-retardant antistatic PE pipe

Abstract

The utility model relates to a flame-retardant antistatic PE pipe. A flame-retardant plastic layer is arranged on the inner side of a high-density polyethylene layer; the first flame-retardant protective layer and the first carbon fiber net layer are arranged on the inner side of the flame-retardant plastic layer, the first carbon fiber net layer is connected with the inner wall of the flame-retardant plastic layer, the first carbon fiber net layer is provided with first meshes, and the first meshes are filled with the first flame-retardant protective layer which is connected with the flame-retardant plastic layer; at least part of the first carbon fiber net layer is exposed out of the first flame-retardant protective layer; the second carbon fiber net layer and the protective layer are arranged on the outer side of the high-density polyethylene layer, the second carbon fiber net layer is connected with the outer wall of the high-density polyethylene layer, the second carbon fiber net layer is provided with second net holes, and the second net holes are filled with the second flame-retardant protective layer which is connected with the high-density polyethylene layer; and at least part of the second carbon fiber net layer is exposed from the second flame-retardant protective layer. The flame-retardant antistatic PE pipe has good flame retardant property and antistatic property, and the use safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of pipes, in particular to a flame-retardant and antistatic PE pipe. Background Art

[0002] PE pipe, or polyethylene pipe, is a pipe made of polyethylene. It has excellent chemical stability and temperature resistance, and can be used for pipes such as water pipes and gas pipes. High-density polyethylene (HDPE) has been used as gas pipe in residential and commercial buildings. To ensure safety, PE pipe used as gas pipe has higher requirements for flame retardancy and antistatic properties. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a flame-retardant and antistatic PE pipe, which has good flame-retardant and antistatic properties and improves safety in use.

[0004] To achieve the purpose of the present utility model, the present utility model provides a flame-retardant and antistatic PE pipe, which includes a first flame-retardant protective layer, a first carbon fiber mesh layer, a flame-retardant plastic layer, a high-density polyethylene layer, a second carbon fiber mesh layer and a second flame-retardant protective layer; the flame-retardant plastic layer is arranged on the inner side of the high-density polyethylene layer; the first flame-retardant protective layer and the first carbon fiber mesh layer are arranged on the inner side of the flame-retardant plastic layer, the first carbon fiber mesh layer is connected to the inner wall of the flame-retardant plastic layer, the first carbon fiber mesh layer has a first mesh hole, the first flame-retardant protective layer is filled in the first mesh hole and is connected to the flame-retardant plastic layer, and the first carbon fiber mesh layer is at least partially exposed from the first flame-retardant protective layer; the second carbon fiber mesh layer and the protective layer are arranged on the outside of the high-density polyethylene layer, the second carbon fiber mesh layer is connected to the outer wall of the high-density polyethylene layer, the second carbon fiber mesh layer has a second mesh hole, the second flame-retardant protective layer is filled in the second mesh hole and is connected to the high-density polyethylene, and the second carbon fiber mesh layer is at least partially exposed from the second flame-retardant protective layer.

[0005] In some embodiments of the present invention, the aperture of the first mesh is smaller than the aperture of the second mesh.

[0006] In some embodiments of the present invention, the aperture of the first mesh is 10-20 mm, and the aperture of the second mesh is 20-30 mm.

[0007] In some embodiments of the present invention, the thickness of the first carbon fiber mesh layer is equal to the thickness of the second carbon fiber mesh layer, and the thickness of the first flame retardant protective layer is equal to the thickness of the second flame retardant protective layer.

[0008] In some embodiments of the present invention, the thickness of the high-density polyethylene layer is greater than the thickness of the first carbon fiber mesh layer, and the thickness of the high-density polyethylene layer is greater than the thickness of the second carbon fiber mesh layer.

[0009] In some embodiments of the present invention, the thickness of the high-density polyethylene layer is greater than the thickness of the flame-retardant plastic layer.

[0010] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0011] The flame-retardant and anti-static PE pipe of the present invention comprises a composite layer of a first flame-retardant protective layer and a first carbon fiber mesh layer, a flame-retardant plastic layer, a high-density polyethylene layer, and a composite layer of a second carbon fiber mesh layer and a second flame-retardant protective layer, which are arranged in sequence from the inside to the outside. The carbon fiber mesh with a certain conductivity is used to eliminate static electricity on the inner and outer walls of the pipe, and the first flame-retardant protective layer, the second flame-retardant protective layer and the flame-retardant plastic layer are arranged in multiple layers to jointly improve the flame retardancy of the PE pipe, so that the PE pipe has good flame retardant and anti-static properties, meets the use requirements of gas pipelines, etc., and improves the safety of pipeline use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an embodiment of the flame-retardant and antistatic PE pipe of the present invention.

[0013] Figure 2 It is a schematic cross-sectional view of an embodiment of the flame-retardant and antistatic PE pipe of the present invention.

[0014] Figure 3 This is a schematic structural diagram of the first carbon fiber mesh layer in an embodiment of the flame-retardant and antistatic PE tube of the present invention.

[0015] Figure 4 It is a structural schematic diagram of the second carbon fiber mesh layer in an embodiment of the flame-retardant and antistatic PE tube of the present invention.

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods. DETAILED DESCRIPTION

[0017] like Figures 1 to 4 As shown, an embodiment of the present invention provides a flame retardant and antistatic PE pipe, which has good flame retardancy and antistatic properties, can be used in the field of gas pipelines, and can also be used for the transportation of other combustible fluids.

[0018] Specifically, the flame-retardant and antistatic PE tube includes a first flame-retardant protective layer 1, a first carbon fiber mesh layer 2, a flame-retardant plastic layer 3, a high-density polyethylene layer 4, a second carbon fiber mesh layer 5, and a second flame-retardant protective layer 6. The first flame-retardant protective layer 1, the first carbon fiber mesh layer 2, the flame-retardant plastic layer 3, the high-density polyethylene layer 4, the second carbon fiber mesh layer 5, and the second flame-retardant protective layer 6 can each be an annular structure, with the centers of the circles concentrically arranged to form a circular PE tube.

[0019] The flame retardant plastic layer 3 is arranged on the inner side of the high-density polyethylene layer 4. The flame retardant plastic layer 3 can be bonded to the inner wall of the high-density polyethylene layer 4. The flame retardant plastic layer 3 and the high-density polyethylene layer 4 can form a double-layer tube structure by a multi-layer co-extrusion method. The high-density polyethylene layer 4 can be made of existing high-density polyethylene materials, and the flame retardant plastic layer 3 can be made of existing flame retardant plastics. Existing flame retardant plastics can be, for example, flame retardant polyethylene, which is formed by adding flame retardants to polyethylene. The above materials are all existing technologies and will not be described in detail here. The high-density polyethylene layer 4 has good mechanical strength, wear resistance and barrier properties. The high-density polyethylene layer 4 is arranged on the inner side of the flame retardant plastic layer 3. The high-density polyethylene layer 4 can protect the flame retardant plastic layer 3 and improve the overall mechanical properties and sealing of the pipe. The flame retardant plastic layer 3 has a fireproof function, which makes the pipe not easy to burn and improves the safety of the pipe.

[0020] The first flame-retardant protective layer 1 and the first carbon fiber mesh layer 2 are arranged on the inner side of the flame-retardant plastic layer 3, wherein the first carbon fiber mesh layer 2 is connected to the inner wall of the flame-retardant plastic layer 3 and can be bonded to the inner wall of the flame-retardant plastic layer 3. The first carbon fiber mesh layer 2 has a first mesh 21, which can be a rectangular or diamond-shaped mesh. The first flame-retardant protective layer 1 fills the first mesh 21 and is connected to the flame-retardant plastic layer 3. At least a portion of the first carbon fiber mesh layer 2 is exposed from the first flame-retardant protective layer 1, thereby reducing the inner surface resistance of the pipe and improving the antistatic properties of the inner wall. The first carbon fiber mesh layer 2 can be made of existing carbon fiber, which also has advantages such as high temperature resistance. Carbon fiber can also improve the mechanical strength of the pipe. The first flame-retardant protective layer 1 is used to improve the connection strength between the first carbon fiber mesh layer 2 and the flame-retardant plastic layer 3, improve the flatness of the inner wall of the pipe, and reduce fluid flow resistance. The first flame-retardant protective layer 1 is bonded to the inner wall of the flame-retardant plastic layer 3. The first flame-retardant protective layer 1 can be formed by applying an existing flame-retardant coating to the first carbon fiber mesh layer 2. After the flame-retardant coating is applied, a scraper inside the pipe can be used to fill the flame-retardant coating into the first mesh 21, leaving a portion of the first carbon fiber mesh layer 2 exposed. After the flame-retardant coating is cured, the first flame-retardant protective layer 1 is obtained. The first flame-retardant protective layer 1 can block combustion on the inner wall of the pipe. Preferably, the inner wall of the first flame-retardant protective layer 1 is flush with the inner wall of the first carbon fiber mesh layer 2, forming a smooth inner wall of the pipe to facilitate fluid transportation.

[0021] The second carbon fiber mesh layer 5 and the second flame retardant protective layer 6 are arranged on the outside of the high-density polyethylene layer 4. The second carbon fiber mesh layer 5 is connected to the outer wall of the high-density polyethylene layer 4, and the second carbon fiber mesh layer 5 can be bonded to the outer wall of the high-density polyethylene layer 4. The second carbon fiber mesh layer 5 has a second mesh 51, and the second mesh 51 can be a rectangular or diamond-shaped mesh. The second flame retardant protective layer 6 is filled into the second mesh 51 and connected to the high-density polyethylene. The second carbon fiber mesh layer 5 is at least partially exposed from the second flame retardant protective layer 6, thereby reducing the outer surface resistance of the pipe and improving the antistatic properties of the outer wall. The second carbon fiber mesh layer 5 can be made of existing carbon fiber. Carbon fiber also has advantages such as high temperature resistance. Carbon fiber can also improve the mechanical strength of the pipe. The second flame retardant protective layer 6 is used to improve the connection strength between the second carbon fiber mesh layer 5 and the high-density polyethylene layer 4, and improve the flatness of the outer wall of the pipe to prevent the outer wall of the pipe from being easily contaminated by dust and dirt. The second flame retardant protective layer 6 is bonded to the outer wall of the high-density polyethylene layer 4. The second flame retardant protective layer 6 can be formed by coating the existing flame retardant coating on the second carbon fiber mesh layer 5. After the coating is flame retardantly coated, a scraper outside the tube can be used to fill the flame retardant coating into the second mesh 51 and expose part of the second carbon fiber mesh layer 5. After the flame retardant coating is cured, the second flame retardant protective layer 6 is obtained. The second flame retardant protective layer 6 can block combustion on the outer wall of the pipe.

[0022] In some examples of this embodiment, the aperture of the first mesh 21 is smaller than the aperture of the second mesh 51. When the first flame retardant protective layer 1 is filled into the first mesh 21, the inner wall of the first flame retardant protective layer 1 and the inner wall of the first carbon fiber mesh layer 2 can be better made smoother, thereby reducing fluid resistance.

[0023] In some examples of this embodiment, the aperture of the first mesh 21 is 10-20 mm, and the aperture of the second mesh 51 is 20-30 mm. The aperture of the first mesh 21 and the aperture of the second mesh 51 are the maximum dimensions of the first mesh 21 and the second mesh 51, respectively, for example, the diagonal dimensions. When the aperture of the first mesh 21 and the aperture of the second mesh 51 are within the above ranges, the first carbon fiber mesh layer 2 and the second carbon fiber mesh layer 5 have good mechanical strength and can provide sufficient conductivity on the inner and outer surfaces of the tube to reduce the possibility of static electricity accumulation.

[0024] In some examples of this embodiment, the thickness of the first carbon fiber mesh layer 2 is equal to the thickness of the second carbon fiber mesh layer 5, and the thickness of the first flame retardant protective layer 1 is equal to the thickness of the second flame retardant protective layer 6. Using the first carbon fiber mesh layer 2 and the second carbon fiber mesh layer 5 of the same thickness facilitates the use of the same carbon fiber for both, reducing the difficulty of preparing the carbon fiber mesh and lowering the cost.

[0025] In some examples of this embodiment, the thickness of the high-density polyethylene layer 4 is greater than the thickness of the first carbon fiber mesh layer 2, and the thickness of the high-density polyethylene layer 4 is greater than the thickness of the second carbon fiber mesh layer 5. The high-density polyethylene layer 4 serves as the main body of the pipe to improve the mechanical strength of the pipe.

[0026] In some examples of this embodiment, the thickness of the high-density polyethylene layer 4 is greater than the thickness of the flame-retardant plastic layer 3. The high-density polyethylene layer 4, as the main body of the pipe, needs to maintain a relatively large thickness. The flame-retardant plastic layer 3 is arranged in the high-density polyethylene layer 4 and provides sufficient thickness to meet the flame-retardant requirements.

[0027] Finally, it should be emphasized that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A flame retardant and antistatic PE pipe, characterized in that It includes a first flame retardant protective layer, a first carbon fiber mesh layer, a flame retardant plastic layer, a high-density polyethylene layer, a second carbon fiber mesh layer and a second flame retardant protective layer; The flame retardant plastic layer is arranged on the inner side of the high-density polyethylene layer; The first flame retardant protective layer and the first carbon fiber mesh layer are arranged on the inner side of the flame retardant plastic layer, the first carbon fiber mesh layer is connected to the inner wall of the flame retardant plastic layer, the first carbon fiber mesh layer has first mesh holes, the first flame retardant protective layer fills the first mesh holes and is connected to the flame retardant plastic layer, and the first carbon fiber mesh layer is at least partially exposed from the first flame retardant protective layer; The second carbon fiber mesh layer and the second flame retardant protective layer are arranged on the outside of the high-density polyethylene layer, the second carbon fiber mesh layer is connected to the outer wall of the high-density polyethylene layer, the second carbon fiber mesh layer has second mesh holes, the second flame retardant protective layer is filled in the second mesh holes and connected to the high-density polyethylene, and the second carbon fiber mesh layer is at least partially exposed from the second flame retardant protective layer.

2. The flame retardant and antistatic PE pipe according to claim 1, characterized in that The aperture of the first mesh is smaller than the aperture of the second mesh.

3. A flame retardant antistatic PE pipe according to claim 1 or 2, characterized in that The aperture of the first mesh is 10-20 mm, and the aperture of the second mesh is 20-30 mm.

4. The flame retardant and antistatic PE pipe according to claim 1 or 2, characterized in that The thickness of the first carbon fiber mesh layer is equal to the thickness of the second carbon fiber mesh layer, and the thickness of the first flame retardant protective layer is equal to the thickness of the second flame retardant protective layer.

5. The flame retardant antistatic PE pipe according to claim 1 or 2, characterized in that The thickness of the high-density polyethylene layer is greater than the thickness of the first carbon fiber mesh layer, and the thickness of the high-density polyethylene layer is greater than the thickness of the second carbon fiber mesh layer.

6. The flame retardant and antistatic PE pipe according to claim 5, characterized in that The thickness of the high-density polyethylene layer is greater than that of the flame-retardant plastic layer.

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