CN208011094U - A kind of Double-flat wall steel-plastic composite pipe - Google Patents

Abstract

The utility model discloses a kind of Double-flat wall steel-plastic composite pipes.Include internal layer, outer layer is equipped on the outside of internal layer, reinforcing rib layer is equipped between internal layer and outer layer, is equipped with one group of reinforcing rib in reinforcing rib layer, reinforcing rib includes plastic outer layer, first binder layer, steel belt layer, the second adhesive layer, inner plastic successively from outside to inside.The utility model has the corrosion resistance for improving tubing, and forced area bigger, anti-pressure ability is strong, pipe ring stiffness higher, and longitudinal strength is high, reduces tubing weight, reduces the cost of pipeline, can be applied to non-excavating construction, the advantageous effect of the good toughness of pipeline.

Description

A double-flat-wall steel-plastic composite pipe

technical field

The utility model relates to a pipe material, in particular to a steel-plastic composite pipe with double flat walls.

Background technique

At present, the commonly used buried drainage pipes include HDPE structural wall thermal winding pipe (carat pipe) and steel belt reinforced polyethylene (PE) spiral corrugated pipe, but the existing HDPE structural wall thermal winding pipe has the following disadvantages; first High cost of pipe material: because it is made of all-plastic material, when a certain ring stiffness is reached, the amount of material used will increase significantly, and the price of the plastic material itself is relatively expensive, so the cost of comprehensive materials is relatively high, about 30% higher than that of ordinary steel-plastic composite pipes % or more; secondly, it is impossible to produce super-large-diameter pipes: due to the all-plastic material, when producing large-diameter pipes, its compressive performance decreases by 3 squares. Therefore, it is impossible to produce pipes with a diameter of more than 3 meters. Limitation: The third pipe ring stiffness is low: because it is made of all-plastic material, affected by the small bending modulus of the plastic itself, its compressive performance is low, and the ring stiffness is generally about 8kN/㎡. However, the existing steel strip reinforced polyethylene (PE) spiral corrugated pipe has the following disadvantages: the first ring has low rigidity: although the pipe adopts the steel-plastic composite method, due to structural defects, its waveform is hollow in an inverted "U" shape , the compressive strength is still insufficient; second, the steel-plastic interaction is poor, the contact area between the steel belt layer and the inner layer is small, and the force per unit area of the inner layer is large, which is easy to form stress concentration and cause damage to the inner layer; Three, the longitudinal strength is poor, and the outer layer is corrugated. After the pipe is subjected to external force, it is prone to severe bending, and then fracture and damage. Its four, can't be applied to non-excavation construction, and the outer wall of pipe material is corrugated, and when dragging, resistance is big, can't apply this field.

To sum up, the existing technology has poor corrosion resistance of pipes, smaller stress area, weak compression resistance, lower pipe ring stiffness, low longitudinal strength, heavy pipe weight, and high cost of pipes, which cannot be applied to non-opening pipes. Digging construction, poor toughness of the pipeline technical problems.

Utility model content

The purpose of the utility model is to provide a steel-plastic composite pipe with double flat walls. The utility model has the advantages of improved corrosion resistance of the pipe material, larger force bearing area, strong compression resistance, higher pipe ring stiffness, high longitudinal strength, reduced pipe weight, and reduced pipeline cost, and can be applied to non-excavation construction. The toughness of the pipeline is good.

The technical scheme of the utility model: a steel-plastic composite pipe with double flat walls, including an inner layer, an outer layer is arranged outside the inner layer, a reinforcing rib layer is arranged between the inner layer and the outer layer, and a group of The reinforcing rib, the reinforcing rib comprises a plastic outer layer, a first adhesive layer, a steel belt layer, a second adhesive layer, and a plastic inner layer sequentially from outside to inside.

In the aforementioned double flat-wall steel-plastic composite pipe, the shape of the inner layer and the outer layer is circular, the inner surface of the inner layer and the outer surface of the outer layer are flat-walled structures, and the inner layer and the outer layer are respectively composed of cross-sectional They are all formed by winding and lapping diamond-shaped inner and outer belts.

In the aforementioned double flat-walled steel-plastic composite pipe, the outer layer and the inner layer are both made of polyethylene or polypropylene.

In the aforementioned double-flat-wall steel-plastic composite pipe, the reinforcing rib layer is formed by winding a steel-plastic composite solid-wall reinforcing rib with a square cross-section in a threaded shape, and a distance is set between two adjacent reinforcing ribs.

In the aforementioned double flat-walled steel-plastic composite pipe, the outer layer, rib layer and inner layer are all compounded together by high-temperature melting and continuous winding, and the rib layer is made of steel-plastic composite material.

In the aforementioned double-flat-wall steel-plastic composite pipe, the outer plastic layer and the inner plastic layer in the reinforcing rib are made of polyethylene or polypropylene.

Compared with the prior art, the utility model includes a plastic outer layer, a first adhesive layer, a steel belt layer, a second adhesive layer, and a plastic inner layer through the reinforcing rib from the outside to the inside, and the reinforcing rib is formed It is threaded around the outer side of the inner layer, and then protected by the inner layer and the outer layer to improve the corrosion resistance of the pipe; through the reinforcement layer, a steel-plastic composite solid wall reinforcement with a square cross-section is threaded Shaped winding, and the outer layer, rib layer, and inner layer are all combined by high-temperature melting and continuous winding, so that the square rib and the inner and outer layers of the tube are closely bonded to achieve a larger force-bearing area , strong compressive capacity, higher rigidity of the pipe ring, and high longitudinal strength; through the spacing between two adjacent ribs in the rib layer, the weight of the pipe can be reduced, and the cost of the pipe can be reduced; through the inner surface of the inner layer and the The outer surface of the outer layer is a flat wall structure, which reduces the friction coefficient between the liquid transported in the pipeline and the pipeline, and is convenient for transportation in the pipeline. At the same time, the outer wall of the pipeline is flat-walled, thereby reducing the friction between the pipe and the soil, and can be applied In non-excavation construction, the application field has been expanded; the outer layer and inner layer of the utility model are made of polyethylene or polypropylene material, and the plastic outer layer and plastic inner layer in the reinforcing rib are made of polyethylene or polypropylene material, and the polyethylene or polypropylene material is used. Or the characteristics of good toughness of polypropylene material, so as to realize the good toughness of the pipeline.

In summary, the utility model has improved the corrosion resistance of the pipe, has larger stress area, strong compressive capacity, higher pipe ring stiffness, high longitudinal strength, reduced pipe weight, and reduced pipe cost. It can be applied to Non-excavation construction, the beneficial effect of good toughness of the pipeline.

Description of drawings

Fig. 1 is the schematic cross-sectional structure diagram of the stiffener of the present utility model;

Fig. 2 is the schematic diagram of the cross-sectional structure of the outer layer of the utility model;

Fig. 3 is the schematic diagram of the cross-sectional structure of the inner layer belt of the present utility model;

Fig. 4 is a schematic cross-sectional structure diagram of the utility model.

The marks in the drawings are: 1-plastic outer layer, 2-first adhesive layer, 3-steel belt layer, 4-second adhesive layer, 5-plastic inner layer, 6-outer layer, 7- Rib layer, 8-inner layer, 9-outer belt, 10-inner belt, 11-reinforcing rib.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and embodiments, but it is not used as a basis for limiting the utility model.

Example. A double-flat-wall steel-plastic composite pipe, as shown in Figure 1-4, includes an inner layer 8, an outer layer 6 is arranged outside the inner layer 8, and a reinforcement layer 7 is arranged between the inner layer 8 and the outer layer 6 A set of ribs 11 are arranged in the rib layer 7, and the ribs 11 include a plastic outer layer 1, a first adhesive layer 2, a steel belt layer 3, a second adhesive layer 4, a plastic Inner layer 5.

The inner layer 8 and the outer layer 6 are annular in shape, and the inner surface of the inner layer 8 and the outer surface of the outer layer 6 are flat wall structures. The layer belt 10 and the outer layer belt 9 are wound and overlapped.

Both the outer layer 6 and the inner layer 8 are made of polyethylene or polypropylene.

The reinforcing rib layer 7 is made of a steel-plastic composite solid wall reinforcing rib 11 with a square cross-section wound in a thread shape, and a distance is set between two adjacent reinforcing ribs 11 .

The outer layer 6, the rib layer 7, and the inner layer 8 are all compounded together by high-temperature melting and continuous winding, and the rib layer 7 is made of steel-plastic composite material.

The plastic outer layer 1 and the plastic inner layer 5 in the reinforcing rib 11 are made of polyethylene or polypropylene.

The utility model includes a plastic outer layer 1, a first adhesive layer 2, a steel belt layer 3, a second adhesive layer 4, and a plastic inner layer 5 through the reinforcing rib 11 from the outside to the inside, and the reinforcing rib 11 is formed. It is threaded around the outside of the inner layer 8, and then protected by the inner layer 8 and the outer layer 6 to improve the corrosion resistance of the pipe; through the reinforcement layer 7, a steel-plastic composite solid wall with a square cross section The reinforcing rib 11 is wound in a helical shape, and the outer layer 6, the reinforcing rib layer 7, and the inner layer 8 are combined through high-temperature melting and continuous winding, so that the square reinforcing rib 11 and the inner layer 8 and outer layer of the pipe 6 Closely fit to achieve larger force bearing area, strong compression resistance, higher pipe ring rigidity, and high longitudinal strength; through the spacing between two adjacent ribs 11 in the rib layer 7, the weight of the pipe can be reduced , to reduce the cost of the pipeline; the inner surface of the inner layer 8 and the outer surface of the outer layer 6 are both flat-walled structures, reducing the friction coefficient between the liquid transported in the pipeline and the pipeline, facilitating pipeline transportation, and the outer wall of the pipeline is flat-walled , thereby reducing the friction between the pipe and the soil, which can be applied to non-excavation construction and expands the application field; the outer layer 6 and the inner layer 8 of the utility model are made of polyethylene or polypropylene, and the reinforcing rib 11 The plastic outer layer 1 and the plastic inner layer 5 are made of polyethylene or polypropylene, and the toughness of the pipe is realized by utilizing the characteristics of good toughness of polyethylene or polypropylene.

Claims (6)

1. A double-flat-wall steel-plastic composite pipe, characterized in that: it includes an inner layer (8), an outer layer (6) is provided outside the inner layer (8), and the inner layer (8) and the outer layer (6) ribs Layer (7), a set of reinforcing ribs (11) is arranged in the reinforcing rib layer (7), and the reinforcing ribs (11) include a plastic outer layer (1), a first adhesive layer (2), A steel belt layer (3), a second adhesive layer (4), and a plastic inner layer (5). 2. The double-flat-wall steel-plastic composite pipe according to claim 1, characterized in that: the inner layer (8) and the outer layer (6) are circular in shape, and the inner surface of the inner layer (8) and The outer surface of the outer layer (6) is a flat wall structure, and the inner layer (8) and the outer layer (6) are respectively formed by winding and lapping the inner layer belt (10) and the outer layer belt (9) with diamond-shaped cross-sections . 3. The double-flat-wall steel-plastic composite pipe according to claim 2, characterized in that: the outer layer (6) and the inner layer (8) are both made of polyethylene or polypropylene. 4. The double-flat-wall steel-plastic composite pipe according to claim 1, characterized in that: the reinforcing rib layer (7) is made of a steel-plastic composite solid-wall reinforcing rib (11) with a square cross-section through threaded It is formed by winding, and there is a space between two adjacent reinforcing ribs (11). 5. The double flat-wall steel-plastic composite pipe according to claim 4, characterized in that: the outer layer (6), the rib layer (7), and the inner layer (8) are all melted at high temperature and continuously Winding and compounding together, the reinforcing rib layer (7) is made of steel-plastic composite material. 6. The double-flat-wall steel-plastic composite pipe according to claim 4, characterized in that: the plastic outer layer (1) and plastic inner layer (5) in the reinforcing rib (11) are made of polyethylene or polypropylene .