CN210234194U - Double-layer composite PE pipe - Google Patents
Double-layer composite PE pipe Download PDFInfo
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- CN210234194U CN210234194U CN201921118100.9U CN201921118100U CN210234194U CN 210234194 U CN210234194 U CN 210234194U CN 201921118100 U CN201921118100 U CN 201921118100U CN 210234194 U CN210234194 U CN 210234194U
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Abstract
The utility model provides a double-layer composite PE pipe, which comprises an inner layer pipe and an outer layer pipe, wherein the inner layer pipe and the outer layer pipe are both made of HDPE (high density polyethylene) materials; the inner layer pipe at least comprises a first pipe wall area and a second pipe wall area which are oppositely arranged, the thickness of the first pipe wall area is different from that of the second pipe wall area, the first pipe wall area and the second pipe wall area form a double-spiral structure along the length direction of the inner layer pipe, the outer wall of the inner layer pipe forms a spiral fluctuating surface along the length direction, and the spiral fluctuating surface is used for fixing the outer layer pipe. This application is through setting up first pipe wall district and the second pipe wall district that thickness is different on the inlayer pipe to form double helix structure with first pipe wall district and second pipe wall district along PE pipe length direction, increased the area of contact of inlayer pipe outer wall and outer inside pipe wall, helical structure all provides the fixing effect to the radial of outer pipe and axial, and through the deformation of relapse diversely, has realized better fixing effect.
Description
Technical Field
The utility model relates to a tubular product technical field, concretely relates to double-deck compound PE pipe.
Background
Polyethylene (PE) is a thermoplastic resin obtained by polymerizing ethylene. Is divided into Low Density Polyethylene (LDPE), Medium Density Polyethylene (MDPE) and High Density Polyethylene (HDPE), the density of LDPE is 0.91g/cm3-0.93g/cm3The polyethylene resin is the lightest variety of polyethylene resin, has good flexibility, extensibility, electrical insulation, transparency, easy processability and fixed air permeability, has good chemical stability, is alkali-resistant and resistant to common organic solvents, but has poor mechanical strength, transparency and aging resistance. MDPE density of 0.926/cm3-0．953/cm3Characterized by environmental stress cracking resistance and long-term strength retention. HDPE density 0.941/cm3-0.960/cm3The high-density polyethylene has good heat resistance and cold resistance, good chemical stability, higher rigidity and toughness and good mechanical strength.
The double-layer PE pipe is a widely used pipe, and the common process comprises the steps of firstly extruding a PE inner pipe through an extruder, then extruding a PE outer pipe, and then coating the outer pipe on the surface of the inner pipe. However, when the outer pipe is coated on the outer wall of the inner pipe, the existing double-layer PE pipe has poor holding effect of the outer wall of the inner pipe on the outer pipe.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model provides a double-deck compound PE pipe has solved current double-deck PE tubular product, and when cladding outer tube on the inner tube outer wall, the inner tube outer wall is to the relatively poor technical problem of the fixing effect of outer tube.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
a double-layer composite PE pipe comprises an inner layer pipe and an outer layer pipe, wherein the inner layer pipe and the outer layer pipe are both made of HDPE (high density polyethylene) materials; the inner-layer pipe at least comprises a first pipe wall area and a second pipe wall area which are oppositely arranged, the thickness of the first pipe wall area is different from that of the second pipe wall area, the first pipe wall area and the second pipe wall area form a double-spiral structure along the length direction of the inner-layer pipe, the outer wall of the inner-layer pipe forms a spiral fluctuating surface along the length direction, and the spiral fluctuating surface is used for fixing the outer-layer pipe.
Optionally, the first pipe wall area is a pipe wall position of the inner pipe with the minimum wall thickness, the second pipe wall area is a pipe wall position of the inner pipe with the maximum wall thickness, and the first pipe wall area gradually increases along the circumferential direction of the inner pipe wall to be smoothly connected with the second pipe wall area.
Optionally, a first protruding portion is arranged on the outer wall of the inner pipe, and the first protruding portion extends towards a direction away from the center of the inner pipe.
Optionally, the first protrusion is flush with the second tubular wall region maximum outer diameter.
Optionally, a second protrusion and a third protrusion are further disposed on the outer wall of the inner pipe, the second protrusion is located on one side of the first protrusion in the circumferential direction of the inner pipe, and the third protrusion is located on the other side of the first protrusion in the circumferential direction of the inner pipe.
Optionally, the second protruding portion is multiple, and multiple second protruding portions are arranged at intervals; the number of the third protruding parts is also plural, and the plural third protruding parts are arranged at intervals.
Optionally, the second and third protrusions are symmetrically distributed with respect to the first protrusion.
Optionally, a fourth protruding portion is further disposed on the outer wall of the inner tube, the fourth protruding portion extends towards a direction away from the center of the inner tube, and the fourth protruding portion is disposed opposite to the first protruding portion.
The utility model has the advantages that:
the utility model provides a double-layer composite PE pipe, which comprises an inner layer pipe and an outer layer pipe, wherein the inner layer pipe and the outer layer pipe are both made of HDPE (high density polyethylene) materials; the inner-layer pipe at least comprises a first pipe wall area and a second pipe wall area which are oppositely arranged, the thickness of the first pipe wall area is different from that of the second pipe wall area, the first pipe wall area and the second pipe wall area form a double-spiral structure along the length direction of the inner-layer pipe, the outer wall of the inner-layer pipe forms a spiral fluctuating surface along the length direction, and the spiral fluctuating surface is used for fixing the outer-layer pipe. This application is through setting up first pipe wall district and the second pipe wall district that thickness is different on the inlayer pipe to form double helix structure with first pipe wall district and second pipe wall district along PE pipe length direction, increased the area of contact of inlayer pipe outer wall and outer inside pipe wall, helical structure all provides the fixing effect to the radial of outer pipe and axial, and through the deformation of relapse diversely, has realized better fixing effect.
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 embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a cross-sectional view of a double-layered composite PE pipe in the length direction;
FIG. 2 is a cross-sectional view of a double-layer composite PE pipe;
FIG. 3 is a schematic structural diagram of another embodiment of a double-layer composite PE pipe;
FIG. 4 is a schematic structural diagram of another embodiment of a double-layer composite PE pipe;
FIG. 5 is a schematic diagram of the production of the inner layer pipe production equipment of the double-layer composite PE pipe;
reference numerals:
1-inner layer tube, 2-outer layer tube, 4-mandrel and 5-outer cylinder;
11-first tube wall section, 12-second tube wall section, 31-first projection, 32-second projection, 33-third projection, 34-fourth projection, 51-indentation.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
Referring to fig. 1-4, the present invention provides a double-layer composite PE pipe, which comprises an inner layer pipe 1 and an outer layer pipe 2, wherein the inner layer pipe 1 and the outer layer pipe 2 are both made of HDPE high density polyethylene material, so that the manufactured PE pipe has good heat resistance and cold resistance, good chemical stability, high rigidity and toughness, and good mechanical strength. The inner-layer pipe 1 at least comprises a first pipe wall area 11 and a second pipe wall area 12 which are oppositely arranged, the thickness of the first pipe wall area 11 is different from that of the second pipe wall area 12, the first pipe wall area 11 and the second pipe wall area 12 form a double-spiral structure along the length direction of the inner-layer pipe 1, the outer wall of the inner-layer pipe 1 forms a spiral fluctuating surface along the length direction, and the spiral fluctuating surface is used for fixing the outer-layer pipe 2. Through set up first pipe wall district 11 and the second pipe wall district 12 that thickness is different on inlayer pipe 1 to form double helix structure with first pipe wall district 11 and second pipe wall district 12 along PE pipe length direction, increased the area of contact of inlayer pipe 1 outer wall and outer pipe 2 inner wall, helical structure all provides the fixing effect to the radial of outer pipe 2 and axial, and through the deformation of relapse diversely, has realized better fixing effect.
As a further improvement to the above scheme, please refer to fig. 2, the first tube wall region 11 is a tube wall position of the inner tube 1 with the minimum wall thickness, the second tube wall region 12 is a tube wall position of the inner tube 1 with the maximum wall thickness, and the first tube wall region 11 gradually increases along the circumferential direction of the inner tube 1 to be smoothly connected with the second tube wall region 12. That is, the inner wall of the inner pipe 1 and the outer wall of the inner pipe 1 form an eccentric structure, so that the outer wall of the inner pipe 1 forms a spiral undulating surface along the length direction, and the contact area between the outer wall of the inner pipe 1 and the inner wall of the outer pipe 2 is increased.
As a further improvement to the above solution, please refer to fig. 3, a first protrusion 31 is disposed on an outer wall of the inner tube 1, and the first protrusion 31 extends in a direction away from the center of the inner tube 1. In particular, the first protrusion 31 is flush with the maximum outer diameter of the second tube wall section 12, i.e. the first protrusion 31 is a wall thickness compensation of the first tube wall section 11, so that the wall thickness of the first tube wall section 11 is equal to the wall thickness of the second tube wall section 12. The first protruding part 31 forms a structure reinforcing effect at the thinnest place of the wall thickness of the inner layer pipe 1, meanwhile, the first protruding part 31 further increases the contact area between the outer wall of the inner layer pipe 1 and the inner wall of the outer layer pipe 2, and the fixing effect is further enhanced through repeated multi-directional deformation of the protruding parts.
As a further improvement to the above solution, please refer to fig. 3, a second protrusion 32 and a third protrusion 33 are further disposed on the outer wall of the inner tube 1, the second protrusion 32 is located on one side of the first protrusion 31 in the circumferential direction of the inner tube 1, and the third protrusion 33 is located on the other side of the first protrusion 31 in the circumferential direction of the inner tube 1. Preferably, the second protruding portion 32 is plural, and the plural second protruding portions 32 are arranged at intervals; the third protruding portion 33 is also provided in plural, and the plural third protruding portions 33 are provided at intervals. In one embodiment, the second protrusion 32 and the third protrusion 33 are symmetrically distributed with respect to the first protrusion 31. The arrangement of the plurality of protruding parts forms a plurality of spiral bulges on the outer wall of the inner-layer pipe 1, and the helix angle and the rotation direction of the plurality of protruding parts are the same as those of the first pipe wall area, so that the fixing effect of the outer wall of the inner-layer pipe 1 on the outer-layer pipe 2 is improved.
As a further improvement to the above solution, please refer to fig. 4, a fourth protrusion 34 is further disposed on the outer wall of the inner tube 1, the fourth protrusion 34 extends in a direction away from the center of the inner tube 1, and the fourth protrusion 34 is disposed opposite to the first protrusion 31. In one embodiment, four protrusions are uniformly distributed on the circumference of the outer wall of the inner-layer pipe 1, so that four spiral protrusions with equal thread pitches are formed on the outer wall of the inner-layer pipe 1, and the holding effect of the outer wall of the inner-layer pipe 1 on the outer-layer pipe 2 is improved.
Based on the double-layer composite PE pipe provided in the above embodiment, the present application also provides a production apparatus for an inner-layer pipe of a double-layer composite PE pipe, which can produce any double-layer composite PE pipe including those in the above embodiments. Specifically, referring to fig. 5, the production equipment includes a mandrel 4 and an outer cylinder 5, the outer cylinder 5 and the mandrel 4 are eccentrically arranged, the outer cylinder 5 is in transmission connection with an external driving device, the external driving device is used for driving the outer cylinder 5 to rotate around the axis of the mandrel 4, and at least one notch 51 is formed in the inner wall of the outer cylinder 5. When using this production facility, dabber 4 does not rotate, and urceolus 5 rotates at the uniform velocity, then the inlayer pipe material that extrudes from the clearance department of 4 outer walls of dabber and 5 inner walls of urceolus extrudes the mouth shaping at equipment and obtains the inlayer pipe, and the outer wall of the inlayer pipe that obtains forms spiral undulation surface along length direction, and the inlayer pipe material that extrudes from breach 51 forms spiral protruding portion on the inlayer pipe surface promptly, moulds plastics after will outer pipe material melting again on the inlayer pipe outer wall, obtain this application double-deck compound PE pipe.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (8)
1. The utility model provides a double-deck compound PE pipe, includes inlayer pipe (1) and outer pipe (2), its characterized in that: the inner layer pipe (1) and the outer layer pipe (2) are both made of HDPE (high density polyethylene) materials; the inner-layer pipe (1) at least comprises a first pipe wall area (11) and a second pipe wall area (12) which are oppositely arranged, the thickness of the first pipe wall area (11) is different from that of the second pipe wall area (12), the first pipe wall area (11) and the second pipe wall area (12) form a double-spiral structure along the length direction of the inner-layer pipe (1), the outer wall of the inner-layer pipe (1) forms a spiral fluctuating surface along the length direction, and the spiral fluctuating surface is used for fixing the outer-layer pipe (2).
2. The double-layer composite PE pipe of claim 1, wherein: the first pipe wall area (11) is the pipe wall position of the minimum wall thickness of the inner layer pipe (1), the second pipe wall area (12) is the pipe wall position of the maximum wall thickness of the inner layer pipe (1), and the first pipe wall area (11) is gradually increased along the circumferential direction of the wall of the inner layer pipe (1) to be smoothly connected with the second pipe wall area (12).
3. The double-layer composite PE pipe of claim 2, wherein: be equipped with first protruding portion (31) on the outer wall of inlayer pipe (1), first protruding portion (31) orientation is kept away from the direction extension in inlayer pipe (1) center.
4. The double-layer composite PE pipe according to claim 3, wherein: the first protrusion (31) is flush with the second tube wall region (12) maximum outer diameter.
5. The double-layer composite PE pipe according to claim 4, wherein: the outer wall of the inner-layer pipe (1) is further provided with a second protruding portion (32) and a third protruding portion (33), the second protruding portion (32) is located on one side of the first protruding portion (31) in the circumferential direction of the inner-layer pipe (1), and the third protruding portion (33) is located on the other side of the first protruding portion (31) in the circumferential direction of the inner-layer pipe (1).
6. The double-layer composite PE pipe according to claim 5, wherein: the second protruding parts (32) are multiple, and the second protruding parts (32) are arranged at intervals; the number of the third protrusions (33) is also plural, and the plural third protrusions (33) are provided at intervals.
7. The double-layer composite PE pipe according to any one of claims 5 to 6, wherein: the second projection (32) and the third projection (33) are symmetrically distributed with respect to the first projection (31).
8. The double-layer composite PE pipe of claim 7, wherein: still be equipped with fourth protruding portion (34) on the outer wall of inlayer pipe (1), fourth protruding portion (34) orientation is kept away from the direction extension of inlayer pipe (1) center, just fourth protruding portion (34) with first protruding portion (31) set up relatively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921118100.9U CN210234194U (en) | 2019-07-17 | 2019-07-17 | Double-layer composite PE pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921118100.9U CN210234194U (en) | 2019-07-17 | 2019-07-17 | Double-layer composite PE pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210234194U true CN210234194U (en) | 2020-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921118100.9U Active CN210234194U (en) | 2019-07-17 | 2019-07-17 | Double-layer composite PE pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210234194U (en) |
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2019
- 2019-07-17 CN CN201921118100.9U patent/CN210234194U/en active Active
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