CN203099133U

CN203099133U - Double-wall composite corrugated pipe

Info

Publication number: CN203099133U
Application number: CN 201320040354
Authority: CN
Inventors: 周成立
Original assignee: GUANGDONG WLR TECHNOLOGY Co Ltd
Current assignee: GUANGDONG WLR TECHNOLOGY Co Ltd
Priority date: 2013-01-25
Filing date: 2013-01-25
Publication date: 2013-07-31
Anticipated expiration: 2023-01-25

Abstract

The utility model relates to an industrial pipe, in particular to a double-wall composite corrugated pipe. The double-wall composite corrugated pipe comprises an outer layer and an inner layer, the outer layer and the inner layer are welded together in a hot melting mode. The double-wall composite corrugated pipe is characterized in that both the inner layer and the outer layer are machined to be corrugation-shaped, the heights of inner layer corrugations are larger than the heights of outer layer corrugations, and the outer layer is of a smooth micro-corrugation shape structure. The double-wall composite corrugated pipe is high in longitudinal strength, ring stiffness and stretching resistance, easy to coil, good in constructability, and capable of meeting trenchless construction requirements.

Description

The composite corrugated tubing of double-walled

Technical field

The utility model relates to a kind of industrial tubing, relates in particular to the composite corrugated tubing of a kind of double-walled.

Background technique

The tubing in fields such as power cable, communication sheath, draining blowdown is generally polypropylene single-wall corrugated pipe and HDPE double-wall corrugated pipe at present, wherein there is following shortcoming in the polypropylene single-wall corrugated pipe: 1, because of being single layer structure, structural imperfection is arranged on strength, ring stiffness is relatively low, the longitudinal strength of tubing is not high yet, and is crooked easily; 2, because the crest of its outer wall ripple is too high, cause corresponding trough also too dark, tubing can appear when non-excavating construction, can snap in foreign matters such as stone in the outer wall trough, cause the frictional force of outer pipe wall and soil big, improve the resistance when tubing is dilatory, can easily break, can't satisfy the non-excavating construction requirement; 3, because it has only one deck wall, so the shock resistance destructiveness is compared with the compound enhancing tubing of multi-layer structure, and there is a big difference.

There is following shortcoming in the HDPE double-wall corrugated pipe: 1, the HDPE material is softer, and ring stiffness is low; 2, vicat temperature is lower, can not satisfy the electric power purposes; 3, because the crest of its outer wall ripple is too high, cause corresponding trough also too dark, tubing can appear when non-excavating construction, can snap in foreign matters such as stone in the outer wall trough, cause the frictional force of outer pipe wall and soil big, improve the resistance when tubing is dilatory, can easily break, can't satisfy the non-excavating construction requirement; 4, because of pipe material inner wall is a planomural, its flexural strength is excessive, and when coiling operation, wrinkle can appear in tubing, damage.

The model utility content

The technical problems to be solved in the utility model is to provide a kind of longitudinal strength height, the ring stiffness height, and stretching resistance is strong, and satisfies the composite corrugated tubing of double-walled of non-excavating construction requirement.

The utility model is achieved in that the composite corrugated tubing of a kind of double-walled, comprise skin and internal layer, be welded together by hot melt between described skin and the internal layer, it is characterized in that: described internal layer and skin all are processed as corrugated, the height of internal layer ripple is greater than the height of outer ripple, and skin is level and smooth microwave striated structure.

The thickness of described outer ripple struction layer is 1-8mm.

The thickness of described internal layer ripple struction layer is 1-12mm.

Described skin and internal layer are modified polypropene or modified poly ethylene construction layer, also can be the different materials of welding mutually of two kinds of difference in functionalitys.

The crest width of described corrugated internal layer is 5-35mm.

The trough arc radius of described corrugated internal layer is 3-25mm.

The production method of above-mentioned double-wall composite pipe material the steps include:

Step 1, extrude internal layer,, be undulatory single-wall corrugated pipe inside and outside being molded into by having the molding machine of ripple struction module with the A extruder;

Step 2, extrude skin, under action of high temperature, under the effect of composite dies skin is being coated on the single-wall corrugated pipe of being extruded by the A extruder, behind vacuum, cooling and shaping, form the double-wall composite pipe material that internal and external layer is ripple struction with the B extruder.

The composite corrugated tubing of the utility model double-walled has following advantage: because skin is the microwaviness construction layer, form stable triangle with internal layer, thereby can greatly promote the compressive strength of tubing, guarantee the buckling strength that tubing is suitable simultaneously and can be used for coiling, be smooth relatively microwaviness structure because of its skin simultaneously, thereby the frictional force of tubing and soil is less when being used for non-excavating construction, can satisfy the non-excavating construction requirement; In addition, the ring stiffness of the utility model tubing can reach 30～100Kn/m2, and good heat resistance.

Description of drawings

In conjunction with the embodiments the utility model is further described with reference to the accompanying drawings.

Fig. 1 is the overall structure schematic representation of the composite corrugated tubing of the utility model double-walled.

Embodiment

Come the utility model is described in detail below in conjunction with specific embodiment.

See also shown in Figure 1, be the composite corrugated tubing of a kind of double-walled described in the utility model, comprise outer 1 and internal layer 2, described outer 1 and internal layer 2 between be welded together by hot melt, described internal layer and skin all are processed as corrugated, and the height of internal layer ripple is greater than the height of outer ripple.

Outer 1 thickness is 1～8mm, employing is through polypropylene material or other material of the good-toughness of modification, can improve anti-external damage performance, its structure is level and smooth relatively microwaviness structure, play reinforcement with the effect that reduces resistance, skin 1 forms stable triangle with internal layer 2, thereby can greatly promote the compressive strength of tubing and guarantee suitable tubing buckling strength, be level and smooth relatively microwaviness structure because of skin simultaneously, thereby the frictional force of tubing and soil is less when being used for non-excavating construction, can satisfy non-excavating construction.

The thickness of internal layer 2 is 1-12mm, adopt modified polypropylene material or other material of good strength, its structure is hollow, continuous wave (ripple) shape, play humidification, when reaching certain intensity, can save material, gain in strength, can play the effect of sound insulation simultaneously, the crest width of described undulatory internal layer 2 is 5-35mm, and the arc radius of trough is 3-25mm.

The production method of the composite corrugated tubing of the utility model double-walled is: at first extrude internal layer with the A extruder, by having the molding machine of ripple struction module, be undulatory single-wall corrugated pipe inside and outside being molded into, extrude skin with the B extruder; Under action of high temperature, both are combined with each other then, behind vacuum, cooling and shaping, form the bellows of double-walled by composite dies; All can good bond under action of high temperature between two-layer, form whole.

Claims

1. composite corrugated tubing of double-walled, comprise skin and internal layer, be welded together by hot melt between described skin and the internal layer, it is characterized in that: described internal layer and skin all are processed as corrugated, the height of internal layer ripple is greater than the height of outer ripple, and skin is level and smooth microwave striated structure.

2. the composite corrugated tubing of double-walled according to claim 1 is characterized in that: the thickness of described outer ripple struction layer is 1-8mm.

3. the composite corrugated tubing of double-walled according to claim 1 is characterized in that: the thickness of described internal layer ripple struction layer is 1-12mm.

4. the composite corrugated tubing of double-walled according to claim 1 is characterized in that: described skin and internal layer are modified polypropene or modified poly ethylene construction layer.

5. the composite corrugated tubing of double-walled according to claim 1 is characterized in that: the crest width of described corrugated internal layer is 5-35mm.

6. the composite corrugated tubing of double-walled according to claim 1 is characterized in that: the trough arc radius of described corrugated internal layer is 3-25mm.