CN111017653A

CN111017653A - Composite pipe

Info

Publication number: CN111017653A
Application number: CN201911235230.5A
Authority: CN
Inventors: 段霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-04-17

Abstract

The invention discloses a composite pipe, which comprises a hard inner pipe, a foaming outer pipe and a bonding layer; the foaming outer pipe is sleeved on the periphery of the hard inner pipe, a bonding layer is arranged between the foaming outer pipe and the hard inner pipe, the hard inner pipe is of a hard tubular structure, and the foaming outer pipe is of a seamless tubular structure. The invention belongs to the technical field of pipes, and aims to solve the problem that the larger the diameter of a foaming pipe is, the smaller the wall thickness is, the more serious the collapse and deformation of the foaming pipe is in the prior art. The technical effects achieved are as follows: the foaming outer pipe of the seamless tubular structure which is sleeved on the outer periphery of the hard inner pipe and has uniform wall thickness reduces the collapse and deformation of the foaming outer pipe, obviously improves the quality and the service performance of the composite pipe, obviously prolongs the service life of the composite pipe, and reduces the processing cost of the composite pipe.

Description

Composite pipe

Technical Field

The embodiment of the invention relates to the technical field of pipes, in particular to a composite pipe.

Background

With the rapid pace of industry upgrading, new materials with denser technology are continuously emerging, and the new materials have special new properties, so that the packaging materials of the new materials also need to meet special new requirements, and in the packaging of some new coiled materials, a reel formed by compounding a foaming outer pipe and a hard inner pipe is required to have the characteristics of large size, seamless performance, thin wall performance, certain contractibility and the like; at present, the method for producing the composite product of the large-diameter foamed outer pipe and the hard inner pipe mainly comprises the steps of coating a layer of foamed sheet on the inner pipe, wherein the foamed outer pipe of the process is provided with a seam; in the technical field of seamless compounding of the foaming outer pipe and the hard inner pipe, the maximum diameter which can be manufactured by the traditional process is not more than 150 mm; in the microwave vulcanization process of products, the larger the diameter of the foaming pipe is, the smaller the wall thickness is, the more serious the collapse and deformation of the foaming pipe is, and when the diameter is larger than 150mm and the wall thickness is smaller than 10mm, unacceptable quality defects such as remarkable uneven pipe wall thickness, serious wrinkles and the like can occur, so that the quality of the products is unqualified.

Disclosure of Invention

Therefore, the embodiment of the invention provides a composite pipe, which aims to solve the problem that the larger the diameter of the foaming pipe is, the smaller the wall thickness is, the more serious the collapse and deformation of the foaming pipe are.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

according to a first aspect of embodiments of the present invention, a composite pipe includes a rigid inner pipe, a foamed outer pipe, and a tie layer; the foaming outer pipe is sleeved on the periphery of the hard inner pipe, a bonding layer is arranged between the foaming outer pipe and the hard inner pipe, the hard inner pipe is of a hard tubular structure, and the foaming outer pipe is of a seamless tubular structure.

Further, the foaming outer pipe is a seamless whole pipe with the diameter larger than 150 mm.

Further, the wall thickness of the foamed outer tube is less than 10 mm.

Furthermore, a wrinkle-free composite integral structure is arranged between the foaming outer pipe and the hard inner pipe.

Furthermore, the material of the foaming outer tube is any one of EVA, NBR, ethylene propylene diene monomer, PVC, PU or PE.

Further, the bonding layer is uniformly distributed and bonded or partially bonded.

Further, the bonding layer is of a spiral strip-shaped structure wound on the outer periphery side of the hard inner tube.

Further, the bonding layer has a plurality of circular ring structures which are arranged at equal intervals on the outer periphery of the hard inner tube

Further, the adhesive layer has a lattice-like structure wound around the outer peripheral side of the hard inner tube.

Further, the bonding layer comprises a plurality of bonding belts which are arranged on the outer periphery side of the hard inner tube at equal intervals, the bonding belts are of a strip-shaped structure, and the bonding belts are all parallel to the axis of the hard inner tube.

Further, the adhesive layer includes a plurality of adhesive tapes disposed at equal intervals on the outer peripheral side of the hard inner tube, and the adhesive tapes have a sinusoidal wave-shaped structure.

The invention has the following advantages: the foaming outer pipe of the seamless tubular structure which is sleeved on the outer periphery of the hard inner pipe and has uniform wall thickness reduces the collapse and deformation of the foaming outer pipe, obviously improves the quality and the service performance of the composite pipe, obviously prolongs the service life of the composite pipe, and reduces the processing cost of the composite pipe.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

Fig. 1 is a structural diagram of an external shape of a composite pipe according to some embodiments of the present invention.

Fig. 2 is a partial structural view of a composite pipe according to some embodiments of the present invention.

Fig. 3 is a structural diagram of a hard inner tube of a composite pipe according to some embodiments of the present invention.

Fig. 4 is a structural diagram of a hard inner tube of a composite pipe according to other embodiments of the present invention.

Fig. 5 is a schematic diagram of a rigid inner tube of a composite pipe according to still other embodiments of the present invention.

Fig. 6 is a structural diagram of a rigid inner tube of a composite pipe according to still other embodiments of the present invention.

In the figure: 1. hard inner tube, 2, foaming outer tube, 3, tie coat.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 and fig. 2, the composite pipe material of the present embodiment includes a rigid inner pipe 1, a foamed outer pipe 2, and a bonding layer 3; the periphery side at stereoplasm inner tube 1 is established to foaming outer tube 2 cover, be provided with tie coat 3 between foaming outer tube 2 and the stereoplasm inner tube 1, stereoplasm inner tube 1 is stereoplasm tubular structure, foaming outer tube 2 is seamless tubular structure, the wall thickness of foaming outer tube 2 is even unanimous, tie coat 3 will foam outer tube 2 and the two complex of stereoplasm inner tube together of 1, in the complex process, the diameter of control foaming outer tube 2, after making the two complex, foaming outer tube 2 remains certain stress, thereby it is firm inseparable to maintain the two composite interface, and foam outer tube 2 self structure under the effect of prestressing force becomes more closely knit, the usability is better.

In the implementation process, a special die with the diameter larger than 150mm is developed, an external pressure internal support mode is adopted, and a special material formula is prepared, so that the large-diameter thin-wall product is not collapsed, does not wrinkle and is uniform in thickness in the vulcanization process, the outer surface of the hard inner tube 1 is coated with a binder in advance, then a newly formed foaming outer tube 2 is sleeved on the hard inner tube 1, the outer tube is cooled and shrunk, and the newly formed foaming outer tube and the hard inner tube 1 form a wrinkle-free composite whole which is bonded together.

The technical effect that this embodiment reaches does: the foaming outer pipe 2 which is arranged in the embodiment and is sleeved on the outer peripheral side of the hard inner pipe 1 and has a seamless tubular structure with uniform wall thickness reduces the collapse and deformation of the foaming outer pipe 2, obviously improves the quality and the service performance of the composite pipe, obviously prolongs the service life of the composite pipe, and reduces the processing cost of the composite pipe.

Example 2

As shown in fig. 1 and fig. 2, the composite pipe material of the present embodiment includes all the technical features of embodiment 1, in addition, the foamed outer tube 2 is a seamless whole tube with a diameter greater than 150mm, the wall thickness of the foamed outer tube 2 is less than 10mm, and a wrinkle-free composite integral structure is formed between the foamed outer tube and the rigid inner tube 1; the material of the outer foaming tube 2 is any one of EVA, NBR, ethylene propylene diene monomer, PVC, PU or PE, wherein the EVA refers to ethylene-vinyl acetate copolymer, the NBR refers to nitrile butadiene rubber, the PVC refers to polyvinyl chloride, the PU refers to polyurethane, the PE refers to polyethylene, besides the category, the outer foaming tube 2 can be other materials or a mixture of the materials in the category, for example, the mixing proportion is that the EVA accounts for 18%, the NBR accounts for 12%, the ethylene propylene diene monomer accounts for 24%, the PVC accounts for 16%, the PU accounts for 22%, and the PE accounts for 8%, the outer foaming tube 2 adopting the proportion has better hardness, the occurrence of collapse is obviously reduced, and in addition, the proportion can be any proportion; the bonding layer 3 is uniformly or partially coated with a bonding agent, wherein the bonding agent is uniformly coated on the outer peripheral side of the hard inner tube 1 when the bonding agent is uniformly coated, and when the bonding agent is partially coated, the bonding agent is directly coated on the outer side wall of the hard inner tube 1, and in addition, a shallow groove with an open upper end can be formed on the outer side wall of the hard inner tube 1, and the bonding agent is fully coated in the shallow groove.

The beneficial effects in this embodiment are: the diameter of the foaming outer pipe 2 is set to be larger than 150mm, the wall thickness of the foaming outer pipe is set to be smaller than 10mm, processing and manufacturing of products which cannot be achieved by the traditional process are achieved, the wall thickness of the foaming outer pipe 2 is uniform and consistent, quality defects such as wrinkles are obviously reduced, and the quality is obviously improved; the foaming outer pipe 2 and the hard inner pipe 1 are adhered by uniformly distributing the adhesive, so that the adhesion tightness of the foaming outer pipe 2 and the hard inner pipe 1 is improved, the consumption of the adhesive is reduced by partially adhering the adhesive, and the processing cost is saved.

Example 3

As shown in fig. 3, the composite pipe in this embodiment includes all the technical features of embodiment 1, in addition, the adhesive layer 3 is a spiral strip structure wound on the outer circumferential side of the rigid inner pipe 1, and in an alternative embodiment, for example, a spiral groove is formed on the outer sidewall of the outer pipe of the housing, and the spiral groove is filled with the adhesive layer 3, so as to reduce the gap generated between the foamed outer pipe 2 and the rigid inner pipe 1.

The beneficial effects in this embodiment are: through setting up tie coat 3 into spiral strip structure, showing the joint strength who has improved between stereoplasm inner tube 1 and the foaming outer tube 2, avoided quality defects such as fold that foaming outer tube 2 produced, avoided droing between foaming outer tube 2 and the stereoplasm inner tube 1.

Example 3

As shown in fig. 6, a composite pipe material according to the present embodiment includes all the technical features of embodiment 1, and in addition, the adhesive layer 3 has a plurality of annular structures that are disposed at equal intervals on the outer peripheral side of the hard inner pipe 1, the plurality of annular structures are disposed in parallel with the end surface of the hard inner pipe 1, and the plurality of annular structures are each a horizontal bar structure perpendicular to the axis of the hard inner pipe 1.

The beneficial effects in this embodiment are: through setting up tie coat 3 into a plurality of equidistant horizontal bar structures, have comparatively simple processing degree of difficulty, maneuverability is strong.

Example 5

In an alternative embodiment, for example, a grid-shaped groove, such as a cross-shaped grid structure, is formed in the outer side wall of the outer tube of the housing, and the grid-shaped groove is filled with the bonding layer 3, so that a gap generated between the outer foamed tube 2 and the inner rigid tube 1 is reduced.

The beneficial effects in this embodiment are: through setting up tie coat 3 into latticed structure, showing the joint strength who has improved between stereoplasm inner tube 1 and the foaming outer tube 2, avoided quality defects such as fold that foaming outer tube 2 produced, avoided droing between foaming outer tube 2 and the stereoplasm inner tube 1.

Example 6

As shown in fig. 4, the composite tube in this embodiment includes all the technical features of embodiment 1, in addition, the bonding layer 3 includes a plurality of bonding tapes, the bonding tapes are disposed on the outer peripheral side of the hard inner tube 1 at equal intervals, the bonding tapes are in a strip-shaped structure, and the bonding tapes are all parallel to the axis of the hard inner tube 1.

The beneficial effects in this embodiment are: through setting up tie coat 3 into the elongated structure of a plurality of adhesive tapes, showing the joint strength who has improved between stereoplasm inner tube 1 and the foaming outer tube 2, avoided quality defects such as fold that foaming outer tube 2 produced, avoided droing between foaming outer tube 2 and the stereoplasm inner tube 1.

Example 7

As shown in fig. 5, the composite tube of the present embodiment includes all the technical features of embodiment 1, in addition to that, the adhesive layer 3 includes a plurality of adhesive tapes, the plurality of adhesive tapes are disposed on the outer peripheral side of the rigid inner tube 1 at equal intervals, the adhesive tapes are in a sine wave-shaped structure, in an alternative embodiment, for example, a plurality of wave-shaped grooves are disposed on the outer side wall of the outer tube of the housing, and the adhesive layer 3 fills the wave-shaped grooves, so as to reduce the gap generated between the foamed outer tube 2 and the rigid inner tube 1.

The beneficial effects in this embodiment are: through setting up tie coat 3 into the wave structure of a plurality of adhesive tapes, showing the joint strength who has improved between stereoplasm inner tube 1 and the foaming outer tube 2, avoided quality defects such as fold that foaming outer tube 2 produced, avoided droing between foaming outer tube 2 and the stereoplasm inner tube 1.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.

Claims

1. The composite pipe is characterized by comprising a hard inner pipe (1), a foaming outer pipe (2) and a bonding layer (3); the foaming outer pipe (2) is sleeved on the periphery of the hard inner pipe (1), the bonding layer (3) is arranged between the foaming outer pipe (2) and the hard inner pipe (1), the hard inner pipe (1) is of a hard tubular structure, and the foaming outer pipe (2) is of a seamless tubular structure.

2. A composite pipe according to claim 1, characterized in that the foamed outer tube (2) is a seamless whole tube with a diameter of more than 150 mm.

3. A composite pipe according to claim 2, characterised in that the foamed outer tube (2) has a wall thickness of less than 10 mm.

4. A composite pipe according to claim 1, characterized in that the foamed outer pipe (2) and the rigid inner pipe (1) are of a wrinkle-free composite integrally formed integral structure.

5. The composite pipe material according to claim 1, wherein the material of the outer foamed pipe (2) is any one of EVA, NBR, ethylene propylene diene monomer, PVC, PU or PE.

6. A composite pipe according to claim 1, wherein the bonding layer (3) is a uniform full or partial bond.

7. The composite pipe according to claim 1, wherein the bonding layer (3) is a spiral strip-like structure wound around the outer circumference of the hard inner pipe (1); or the bonding layers (3) are in a plurality of circular ring structures which are arranged on the outer periphery side of the hard inner pipe (1) at equal intervals.

8. A composite pipe according to claim 1, wherein the bonding layer (3) is a grid-like structure wound around the outer circumference of the inner rigid pipe (1).

9. The composite pipe material as claimed in claim 1, wherein the adhesive layer (3) comprises a plurality of adhesive tapes disposed at equal intervals on the outer peripheral side of the rigid inner pipe (1), the adhesive tapes are in a strip-shaped configuration, and the plurality of adhesive tapes are parallel to the axis of the rigid inner pipe (1).

10. The composite pipe material as claimed in claim 1, wherein the adhesive layer (3) comprises a plurality of adhesive tapes disposed at equal intervals on the outer peripheral side of the hard inner tube (1), the adhesive tapes having a sinusoidal wave-like structure.