Polyurethane spraying polyethylene winding thermal insulation pipe

Abstract

The utility model discloses a polyurethane spraying polyethylene winding thermal insulation pipe which comprises an inner steel pipe, a plurality of reinforcing ribs are evenly arranged on the outer wall of the inner steel pipe in the circumferential direction, anti-disengaging teeth are evenly arranged on the outer surface of each reinforcing rib, and a plurality of pairs of anchoring structures are evenly arranged on the two sides of each reinforcing rib. Each anchoring structure comprises two anchoring rods which are symmetrically arranged at the side part of the reinforcing rib, and an anchoring net is fixedly arranged between the two anchoring rods; a polyurethane heat preservation layer is arranged on the outer portion of the inner steel pipe in a spraying mode, and a polyethylene winding layer is arranged on the outer portion of the polyurethane heat preservation layer. The contact area of the polyurethane heat preservation layer and the inner steel pipe after the polyurethane heat preservation layer is sprayed is effectively increased, the anti-disengaging performance of the polyurethane heat preservation layer is improved, the anchoring structures composed of the anchoring rods and the anchoring nets are further arranged on the side portions of the reinforcing ribs, the connection strength of the polyurethane heat preservation layer and the inner steel pipe is further improved, and the service life of the polyurethane heat preservation layer is prolonged. And the service life of the pipe body is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of polyurethane thermal insulation pipes, in particular to a polyurethane sprayed polyethylene winding thermal insulation pipe. Background Art

[0002] Polyurethane sprayed polyethylene winding insulation pipe is a new type of insulation material, which consists of a working steel pipe for conveying medium, a sprayed polyurethane rigid foam plastic insulation layer and a winding polyethylene outer protective pipe. The characteristic of this insulation pipe is that it forms a polyurethane insulation layer on the surface of the steel pipe by spraying, and then fixes the polyethylene outer protective pipe to the outside of the insulation layer by winding. This process is not only efficient, environmentally friendly and energy-saving, but also widely used in the fields of petroleum, chemical industry, and electric power. The advantage of polyurethane sprayed polyethylene winding insulation steel pipe is its high efficiency insulation performance, which can effectively reduce energy loss and improve energy utilization efficiency. At the same time, its environmental protection and energy-saving characteristics also meet the current requirements for sustainable development, so it is widely used in the industrial field. At present, the polyurethane insulation layer of the polyurethane sprayed polyethylene winding insulation pipe is simply sprayed on the surface of the working steel pipe, and its connection strength with the smooth surface of the working steel pipe is limited. It is easy to loosen after long-term use, affecting the service life of the pipe. Utility Model Content

[0003] The utility model aims to provide a polyurethane sprayed polyethylene winding insulation pipe to solve the technical problems mentioned in the above background technology.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The utility model discloses a polyurethane sprayed polyethylene wound thermal insulation pipe, comprising an inner steel pipe, the outer wall of the inner steel pipe is evenly provided with a plurality of reinforcing ribs along the circumferential direction, the outer surface of each reinforcing rib is evenly provided with anti-slip teeth, a plurality of pairs of anchoring structures are evenly provided on both sides of the reinforcing rib, each of the anchoring structures comprises two anchoring rods symmetrically arranged on the side of the reinforcing rib, an anchor net is fixedly arranged between the two anchoring rods; a polyurethane thermal insulation layer is sprayed on the outside of the inner steel pipe, and a polyethylene winding layer is arranged on the outside of the polyurethane thermal insulation layer.

[0006] Furthermore, a fire retardant layer is provided on the outside of the polyethylene winding layer.

[0007] Furthermore, the material of the fire-retardant layer is chloroprene rubber.

[0008] Furthermore, an adhesive layer is provided between the fire-retardant layer and the polyethylene winding layer.

[0009] Furthermore, the material of the adhesive layer is epoxy resin adhesive.

[0010] Compared with the prior art, the beneficial technical effects of the utility model are:

[0011] The utility model evenly arranges a plurality of reinforcing ribs with anti-stripping teeth on the outer periphery of the inner steel pipe of the polyurethane sprayed polyethylene wrapped insulation pipe, thereby effectively increasing the contact area between the polyurethane insulation layer and the inner steel pipe after spraying, and improving the anti-stripping performance of the polyurethane insulation layer. In addition, an anchoring structure composed of an anchor rod and an anchor net is also arranged on the side of each reinforcing rib, which further improves the connection strength between the polyurethane insulation layer and the inner steel pipe, and is beneficial to ensuring the service life of the pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model will be further described below in conjunction with the accompanying drawings.

[0013] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0015] Explanation of the accompanying drawings: 1. inner steel pipe; 2. reinforcing ribs; 3. anti-slip teeth; 4. anchor rod; 5. anchor net; 6. polyurethane insulation layer; 7. polyethylene winding layer; 8. fire retardant layer; 9. adhesive layer. DETAILED DESCRIPTION

[0016] like Figure 1-Figure 2 As shown, a polyurethane sprayed polyethylene wound insulation pipe includes an inner steel pipe 1, and the outer wall of the inner steel pipe 1 is evenly provided with multiple reinforcing ribs 2 along the circumferential direction, and each of the reinforcing ribs 2 is fixedly connected to the outer wall of the inner steel pipe 1 by welding.

[0017] The outer surface of each reinforcing rib 2 is evenly provided with anti-slip teeth 3, and multiple pairs of anchoring structures are evenly provided on both sides of the reinforcing rib 2. Specifically: each anchoring structure includes two anchoring rods 4 symmetrically arranged on the side of the reinforcing rib 2, and an anchor net 5 is fixedly arranged between the two anchoring rods 4.

[0018] The inner steel pipe 1 , the plurality of reinforcing ribs 2 and the anchoring structure are sprayed with a polyurethane insulation layer 6 , and a polyethylene wrapping layer 7 is provided on the outside of the polyurethane insulation layer 6 .

[0019] In addition, as a further improvement of the present invention, a fire retardant layer 8 is provided outside the polyethylene wrapping layer 7, and the material of the fire retardant layer 8 is specifically chloroprene rubber. Specifically: the fire retardant layer 8 is fixed to the polyethylene wrapping layer 7 by an adhesive layer 9, and the material of the adhesive layer 9 is epoxy resin adhesive.

[0020] The utility model evenly arranges a plurality of reinforcing ribs with anti-stripping teeth on the outer periphery of the inner steel pipe of the polyurethane sprayed polyethylene wrapped insulation pipe, thereby effectively increasing the contact area between the polyurethane insulation layer and the inner steel pipe after spraying, and improving the anti-stripping performance of the polyurethane insulation layer. In addition, an anchoring structure composed of an anchor rod and an anchor net is also arranged on the side of each reinforcing rib, which further improves the connection strength between the polyurethane insulation layer and the inner steel pipe, and is beneficial to ensuring the service life of the pipe body.

[0021] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A polyurethane sprayed polyethylene winding insulation pipe, characterized in that: It comprises an inner steel pipe, the outer wall of which is evenly provided with a plurality of reinforcing ribs along the circumferential direction, the outer surface of each reinforcing rib is evenly provided with anti-slip teeth, a plurality of pairs of anchoring structures are evenly provided on both sides of the reinforcing rib, each of the anchoring structures comprises two anchoring rods symmetrically arranged on the sides of the reinforcing rib, an anchor net is fixedly arranged between the two anchoring rods; a polyurethane thermal insulation layer is sprayed on the outside of the inner steel pipe, and a polyethylene winding layer is arranged on the outside of the polyurethane thermal insulation layer.

2. The polyurethane sprayed polyethylene wound insulation pipe according to claim 1, characterized in that: A fire retardant layer is arranged outside the polyethylene winding layer.

3. The polyurethane sprayed polyethylene wound insulation pipe according to claim 2, characterized in that: The material of the fireproof and flame-retardant layer is chloroprene rubber.

4. The polyurethane sprayed polyethylene wound insulation pipe according to claim 2, characterized in that: An adhesive layer is arranged between the fire retardant layer and the polyethylene winding layer.

5. The polyurethane sprayed polyethylene wound insulation pipe according to claim 4, characterized in that: The material of the bonding layer is epoxy resin adhesive.

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