CN205350594U - Multilayer reinforcing RTP pipe - Google Patents

Abstract

The utility model relates to a multi-layer reinforced RTP pipe, which comprises an inner pipe and an outer pipe. At least two reinforcement layers are arranged between the inner pipe and the outer pipe, and at least four reinforcement layers are wound on the outer wall of the inner pipe at a predetermined winding angle. Composed of fiberglass bands, the fiberglass bands are impregnated or peritoneal fiberglass bands. The beneficial effect of the utility model is that the structure is simple and the design is reasonable, not only can bear the working load of fluid transportation, but also can withstand the internal pressure generated in the working process, and can increase the delivery diameter and improve the working efficiency.

Description

A kind of multi-layer reinforced RTP pipe

technical field

The utility model relates to an RTP pipe, in particular to a pressure-resistant multilayer reinforced RTP pipe, which belongs to the technical field of non-metallic fluid delivery pipelines.

Background technique

In today's society, energy is an important life, production and strategic material, and energy such as oil and natural gas plays a pivotal role. Among them, the development of oil and gas resources is inseparable from oil and gas transportation technology, and pipeline transportation is currently the most important means of oil and gas transportation. Pipelines mainly include metal pipes and non-metallic pipes. Metal pipes are currently the most used pipes because of their mature technology, but they cause more accidents and losses due to corrosion. Non-metallic pipes are pipes made of non-metallic materials. Compared with metal pipes, non-metallic pipes have the advantages of corrosion resistance, convenient installation, low cost, and light weight. RTP pipe is a relatively commonly used non-metallic pipe in current production technology. RTP pipes on the market are mainly used in low internal pressure and low tension occasions, and the scope of use is relatively limited. However, during the transportation of submarine oil and gas pipelines, the pipelines will bear a large internal pressure. The internal pressure resistance of ordinary RTP pipes is far from meeting the above-mentioned requirements, and the RTP pipes are small in diameter and poor in transportation capacity.

Utility model content

The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a multi-layer reinforced RTP pipe, which can not only bear the working load of fluid transportation, but also withstand the internal pressure generated during the working process, and increase the transportation capacity. Caliber, improve work efficiency.

In order to solve the above technical problems, the utility model provides a multi-layer reinforced RTP pipe, which includes an inner pipe and an outer pipe. It is composed of glass fiber tapes wound on the outer wall of the inner pipe at a predetermined winding angle, and the glass fiber tapes are impregnated or coated glass fiber tapes.

Further, the winding angle of the glass fiber tape is 54.7±2°.

Further, the number of enhancement layers is 2-40 layers, and the value of the number of layers is generally a multiple of 2.

Further, the inner tube is made of high-density polyethylene, polyamide or polyvinylidene fluoride and extruded.

Further, the outer tube is extruded from high-density polyethylene.

Further, the reinforcement layer is bonded to the outer wall of the extruded inner tube by hot melt, and the outer tube is directly extruded on the surface of the reinforcement layer.

Further, the nominal diameter of the reinforced RTP pipe is DN50~DN300mm.

The beneficial effects of the utility model are: the provided multi-layer reinforced RTP pipe has simple structure and reasonable design, can not only bear the working load of fluid transportation, but also can withstand the internal pressure generated in the working process, and increase the delivery diameter, improve work efficiency.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the utility model.

detailed description

Example 1

The multi-layer reinforced RTP pipe provided by this embodiment has a structure as shown in Figure 1. The pipe body is bonded by hot-melt, and it is a three-layer composite structure, including the inner pipe 3, which is wound on the outer wall of the inner pipe The reinforcement layer 2 and the outer tube 1.

The inner tube 3 is made of high-density polyethylene (above PE80), polyamide or polyvinylidene fluoride, which is mainly used for transmission medium, and the reinforcement layer 2 is mainly used to withstand internal pressure. At least 4 tubes are formed with a winding angle of 54.7° The winding method consists of a glass fiber tape uniformly wound on the outer wall of the inner tube by a winding device, wherein the reinforcement layer 2 is bonded to the outer wall of the extruded inner tube 3 by microwave heating or infrared. The glass fiber tape is completely covered by a layer of resin for impregnation. The reinforcement layer is impregnated or coated glass fiber tape. The winding equipment is evenly wound on the outer wall of the inner tube. It can be wound in 2 layers, 4 layers, 6 layers, and 8 layers. , up to 40 layers can be wound. In order to ensure the balance of hoop stress and axial stress, it is necessary to reversely wind the glass fiber tape. The reinforced layer 2 wraps the outer tube 1, and the outer tube 1 is made of high-density polyethylene (above PE80), and is directly extruded on the surface of the reinforced layer 2 by extrusion equipment. The three-layer composite structure is tightly combined.

Glass fiber (original name in English: glassfiber or fiberglass) is an inorganic non-metallic material with excellent performance. , poor wear resistance. It is made of glass balls or waste glass through high-temperature melting, wire drawing, winding, weaving and other processes. The diameter of its single filament is several microns to more than 20 microns, which is equivalent to a hair. 1/20-1/5 of that, each bundle of fiber precursors consists of hundreds or even thousands of monofilaments. The glass fiber is often used as reinforcing material of composite material, electrical insulation and heat insulation materials, substrate and other national economy fields.

In this embodiment, the inner tube 3 made of different materials can be selected according to different transmission media, and different layers can be selected to be wound on the reinforcing layer 2 according to different operating pressures, so as to overcome the disadvantages of high cost and meet the needs of large diameter, Corrosion resistance, high pressure resistance, wear resistance, strong conveying ability, good flexibility, convenient construction, long service life and other working requirements.

In addition to the above embodiments, the utility model can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model.

Claims (7)

1. a multilamellar strengthens RTP, including inner and outer tubes, it is characterized in that: between said inner tube and outer tube, be provided with multilamellar enhancement layer, the glass fiber tape that described enhancement layer is wrapped on outer wall of inner tube with predetermined winding angle by least 4 forms, and described glass fiber tape adopts dipping or film covered glass fiber band.

2. multilamellar according to claim 1 strengthens RTP, it is characterized in that: the winding angle of described glass fiber tape is 54.7 ± 2 °.

3. multilamellar according to claim 1 and 2 strengthens RTP, it is characterized in that: the Filament-wound Machine number of plies of described enhancement layer is 2～40 layers, and number of plies value is the multiple of 2.

4. multilamellar according to claim 3 strengthens RTP, it is characterized in that: said inner tube adopts high density polyethylene (HDPE), polyamide or polyvinylidene fluoride material, extrusion moulding.

5. multilamellar according to claim 4 strengthens RTP, it is characterized in that: described outer tube adopts high-density polyethylene material extrusion moulding.

6. multilamellar according to claim 5 strengthens RTP, it is characterized in that: described enhancement layer is bonded on the outer wall of inner tube of extrusion moulding by hot melting way, and described outer tube is directly at enhancement layer surface extrusion moulding.

7. multilamellar according to claim 6 strengthens RTP, it is characterized in that: the inside nominal diameter of described enhancing RTP is DN50～DN300mm.