CN217030280U

CN217030280U - Three-layer RFOBC pipe fitting

Info

Publication number: CN217030280U
Application number: CN202220984221.7U
Authority: CN
Inventors: 鲁清清
Original assignee: Anhui Yuanli Hi Tech Materials Co ltd
Current assignee: Anhui Yuanli Hi Tech Materials Co ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-07-22
Anticipated expiration: 2032-04-22

Abstract

The utility model relates to the field of pipe fittings, in particular to a three-layer RFOBC pipe fitting. It includes: an inner layer; the outer layer is provided with alternately distributed wave crests and wave troughs; and the adhesive layer is connected between the inner peripheral surface of the wave trough of the outer layer and the outer peripheral surface of the inner layer. The utility model effectively improves the impact resistance and the structural strength.

Description

Three-layer RFOBC pipe fitting

Technical Field

The utility model relates to the field of pipe fittings, in particular to a three-layer RFOBC pipe fitting.

Background

Early water grids used reinforced concrete pipes and metal pipes. The friction coefficient of the inner wall of the reinforced concrete pipe is larger, and the resistance is larger in the conveying process, so that the conveying efficiency is reduced. In addition, the weight is heavy, and the steel pipe is easy to damage during construction and installation. The metal water pipe is easy to corrode, the manufacturing cost is high, the later maintenance cost is high, and the service life is short. After the advent of plastics, the demand for market tubing has evolved due to their outstanding properties (good toughness, good fatigue resistance, flexibility, ease of processing, long service life). In view of the advantages of PE pipes, the PE pipes gradually replace the traditional reinforced concrete pipes and steel pipes; the PE water supply pipe integrates the advantages of environmental protection, energy conservation, sanitation, sealing property, corrosion resistance, shock resistance and the like, and has irreplaceability in the pipeline industry.

But the PE pipe has low strength and poor slow crack growth resistance, and a pit is easy to cause crack expansion until perforation and pipe explosion when the PE pipe is collided and extruded by hard stones and metals in the construction site or the transportation process.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a three-layer RFOBC pipe fitting which effectively improves the impact resistance and the structural strength aiming at the problems in the background technology.

According to the technical scheme, the three-layer RFOBC pipe fitting comprises:

an inner layer;

the outer layer is provided with alternately distributed wave crests and wave troughs;

and the adhesive layer is connected between the inner peripheral surface of the wave trough of the outer layer and the outer peripheral surface of the inner layer.

Preferably, the inner layer and the adhesive layer are both solid wall layers, and a plurality of adhesive layers are arranged at intervals.

Preferably, the inner layer, the adhesive layer and the outer layer are coaxially arranged in sequence from the inside to the outside.

Compared with the prior art, the utility model has the following beneficial technical effects:

the utility model effectively improves the impact resistance and the structural strength. The bonding layer firmly connects the inner layer and the outer layer, the medium plays a role of internal pressure bearing when circulating inside the pipeline, the corrugated structure of the outer layer mainly plays a role of external pressure bearing and strength enhancement, and the cost of the material is effectively reduced.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a structure of an embodiment of the present invention;

fig. 3 is an enlarged view of a structure at a in fig. 2.

Reference numerals: 1. an inner layer; 2. an outer layer; 3. and (6) bonding the layers.

Detailed Description

As shown in fig. 1-3, the present invention provides a three-layer RFOBC tube comprising an inner layer 1, an outer layer 2 and an adhesive layer 3, wherein the outer layer 2 has alternately distributed peaks and valleys; the adhesive layer 3 is connected between the inner circumferential surface of the valleys of the outer layer 2 and the outer circumferential surface of the inner layer 1. The inner layer 1 and the adhesive layer 3 are both solid wall layers, and a plurality of adhesive layers 3 are arranged at intervals. The inner layer 1, the adhesive layer 3 and the outer layer 2 are coaxially arranged from inside to outside in sequence.

The outer layer 2 is made of a polypropylene blending modified composite material, and the polypropylene blending modified composite material is composed of the following raw materials in parts by weight: 18-30 parts of PPR Yanshan 8101, 18-30 parts of PPB platform plastic 8001, 5-7 parts of LLDPE7042, 10-20 parts of metallocene MPE, 3-5 parts of polyolefin elastomer OBC, 0.2-0.4 part of molten fat regulator, 0.5-1 part of rigidity-increasing nucleating agent and 1-2 parts of barium sulfate; 20-30 parts of environment-friendly food-grade modified nano talcum powder, 2-3 parts of environment-friendly carbon black, 0.3-0.5 part of light heat stabilizer, 0.3-0.5 part of antioxidant 1010, 0.3-0.5 part of antioxidant 168 and 0.5-1 part of light diffusant.

The inner layer 1 is made of a polyethylene blending modified composite material, and the polyethylene blending modified composite material is composed of the following raw materials in parts by weight: 55-72 parts of HDPE 100-grade extension 049, 5-7 parts of LLDPE7042, 10-15 parts of metallocene MPE, 6-9 parts of polyolefin elastomer OBC, 1-2 parts of environment-friendly carbon black, 0.5-1 part of light-heat stabilizer, 1-2 parts of barium sulfate, 5-10 parts of environment-friendly food-grade modified nano talcum powder, 0.3-0.5 part of antioxidant 1010, 0.3-0.5 part of antioxidant 168 and 0.5-1 part of light diffusant.

The adhesive layer 3 is made of a polyethylene blending composite material, and the polyethylene blending composite material is composed of the following raw materials in parts by weight: 40-50 parts of LLDPE7042, 25-30 parts of polyolefin elastomer OBC and 25-30 parts of polyolefin elastomer EVA. The quality of the adhesive layer 3 is better than that of the outer layer 2, and the cost of the outer layer 2 is low, thereby reducing the cost.

The utility model effectively improves the impact resistance and the structural strength. The inner layer 1 and the outer layer 2 are firmly connected through the bonding layer 3, medium plays a role in internal pressure bearing when circulating inside a pipeline, the outer layer corrugated structure mainly plays a role in external pressure bearing and strength enhancement, and material cost is effectively reduced.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A three-layer RFOBC tubular article, comprising:

an inner layer (1);

an outer layer (2) having alternately distributed peaks and valleys;

and the adhesive layer (3) is connected between the inner circumferential surface of the wave trough of the outer layer (2) and the outer circumferential surface of the inner layer (1).

2. Three-layer RFOBC pipe according to claim 1, wherein the inner layer (1) and the adhesive layer (3) are solid wall layers, and the adhesive layer (3) is arranged in plurality at intervals.

3. Three-layer RFOBC tubular article according to claim 1, characterized in that the inner layer (1), the adhesive layer (3) and the outer layer (2) are coaxially arranged from inside to outside.