CN219327854U - High-pressure-resistant HDPE double-wall corrugated pipe and forming module thereof - Google Patents
High-pressure-resistant HDPE double-wall corrugated pipe and forming module thereof Download PDFInfo
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- CN219327854U CN219327854U CN202320051124.7U CN202320051124U CN219327854U CN 219327854 U CN219327854 U CN 219327854U CN 202320051124 U CN202320051124 U CN 202320051124U CN 219327854 U CN219327854 U CN 219327854U
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Abstract
The utility model provides a high-pressure-resistant HDPE double-wall corrugated pipe and a forming module thereof, and relates to the technical field of pipelines, wherein the double-wall corrugated pipe comprises an outer layer and an inner layer; the inner layer is in a straight cylinder shape, and is provided with a through hole; the outer layer is corrugated; the outer layer is provided with alternately distributed wave crest parts and wave trough parts; the inside of the wave crest part is provided with a cavity for sealing high-pressure gas; an arc angle for sealing the cavity is arranged between the crest part and the trough part; a laminated wall thickness is arranged between the outer layer and the inner layer; the double-wall corrugated pipe has strong compression resistance through the corrugated design of the wave crest part and the wave trough part and the cavity with high-pressure gas, and is suitable for the environment of uneven settlement of soil.
Description
Technical Field
The utility model relates to the technical field of pipelines, in particular to a high-pressure-resistant HDPE double-wall corrugated pipe and a forming module thereof.
Background
The double-wall corrugated pipe is mainly used for urban drainage, pollution discharge, water supply, buried protection of wires and cables, farmland irrigation and the like. According to the different materials, the PVC double-wall corrugated pipe (polyvinyl chloride double-wall corrugated pipe), the HDPE double-wall corrugated pipe (high-density polyethylene double-wall corrugated pipe), the PE double-wall corrugated pipe (polyethylene double-wall corrugated pipe), the PP double-wall corrugated pipe (polypropylene double-wall corrugated pipe) and the like can be classified.
The high-density polyethylene (HDPE) double-wall corrugated pipe is a novel pipe with an annular structure outer wall and a smooth inner wall, has a simple structure, is widely applied to municipal pipeline liquid conveying pipelines, is first developed successfully in Germany in the beginning of the last century 80, and is greatly popularized and applied in many developed countries due to the excellent performance and the relatively economical manufacturing cost. In China, popularization and application of HDPE double-wall corrugated pipes are in an ascending state, and various technical indexes reach the use standard. In the field of liquid delivery, the cement faucet tube has more economic and social benefits compared with cement faucet tubes; compared with cement spigot and socket pipe, the HDPE double-wall corrugated pipe has the following advantages: firstly, the construction period and the construction difficulty are greatly shortened; secondly, the requirements on the trench bottom are not high, and the trench bottom is not required to be flat because the trench bottom is a flexible pipe, so that the requirements on constructors are also low; thirdly, the ground subsidence or crust change is not broken; fourthly, the permeability is far lower than that of the cement spigot and socket pipe, and secondary pollution to groundwater is avoided; fifthly, the inner surface of the pipe is smooth, no positive and negative nuclei are carried out, and no scaling is caused. Besides the field of municipal pipeline drainage, pollution discharge and liquid delivery, the HDPE double-wall corrugated pipe can be widely applied to various fields, such as a protection pipe for communication cables and optical cables, a ventilation pipe for a mine, a calandria for agricultural gardens, a seepage pipe and a drainage pipe for saline-alkali soil expressways and the like.
The prior art discloses a double-wall corrugated pipe comprising an outer wall and an inner wall; the outer wall is the tube-shape, forms annular first convex part and first concave part along the length direction of outer wall in turn, and the inner wall is straight tube-shape, and the cover is located in the outer wall, is connected with first concave part, forms first cavity with between the first convex part, and the inner wall material is LDPE. According to the technical scheme, different materials are used for the inner layer and the outer layer, so that the ring rigidity of the outer wall is ensured, the bending rigidity is reduced, and the outer wall can be bent at will. However, the prior art is insufficient in compression resistance and is not suitable for an environment where soil is unevenly settled.
Disclosure of Invention
The utility model provides the high-pressure-resistant HDPE double-wall corrugated pipe and the forming module thereof, which are used for solving the problem that the prior art is not suitable for the uneven settlement of soil, and the high-pressure-resistant HDPE double-wall corrugated pipe is high in pressure bearing strength and high in compression resistance and is suitable for the uneven settlement environment of soil.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a high pressure resistant HDPE double-wall corrugated pipe comprises an outer layer and an inner layer; the inner layer is in a straight cylinder shape; the outer layer is of a corrugated structure; the corrugated structure comprises alternately distributed wave crest parts and wave trough parts; the inside of the wave crest part is provided with a cavity for sealing high-pressure gas; an arc angle for sealing the cavity is arranged between the crest part and the trough part; and a laminated wall thickness is arranged between the outer layer and the inner layer.
The working principle of the utility model is as follows:
according to the utility model, the pressure of the pipeline is relieved through the quick drainage of the straight cylindrical inner layer, the bearing capacity is enhanced through the wave crest and the wave trough, the bearing strength is enhanced through the cavity used for sealing high-pressure gas in the wave crest part, the corrugated pipe is not easy to deform due to the high-pressure gas in the wave crest part when the corrugated pipe is subjected to external pressure, and the pipeline is suitable for the condition of uneven stress of the pipeline caused by uneven settlement of soil.
Preferably, the top end of the crest part is of an arc-shaped structure, and rounded corner structures are arranged at two ends of the arc-shaped structure, so that the crest part is arched.
Preferably, the distance from any one crest portion to the other crest portion is smaller than the distance from any one trough portion to the other trough portion.
Preferably, the bottom of the cavity has a length greater than the length of the top.
The high-pressure-resistant HDPE double-wall corrugated pipe forming module is applied to the high-pressure-resistant HDPE double-wall corrugated pipe, and comprises an outer layer extrusion nozzle and an outer layer forming die; the discharge hole of the outer layer extrusion nozzle is connected with the feed hole of the outer layer forming die.
Further, the outer layer extrusion nozzle is provided with an gradual-open curvature flow channel; the two ends of the involute curvature flow channel are respectively connected with the feed inlet and the discharge outlet of the outer layer extrusion nozzle, and the involute curvature flow channel is a channel provided with a plurality of arc curves.
Further, the outer layer forming die comprises a plurality of uniform annular arc-shaped continuous blowing cooling flow passages and outer layer forming passages corresponding to the outer layers; the inner part of the outer layer forming die is hollow, the outer layer forming channel is arranged on the inner wall of the outer layer forming die, the uniform circular arc-shaped continuous blowing cooling flow channel is arranged on the outer wall of the outer layer forming die, and the uniform circular arc-shaped continuous blowing cooling flow channel is an arc-shaped channel.
Further, the outer layer forming die further comprises a transition layer, wherein the transition layer is arranged in the outer layer forming die and is arranged between the uniform circular arc-shaped continuous blowing cooling flow passage and the outer layer forming passage; the transition layer is annular.
Further, the outer layer forming die further comprises an air hole and an air channel, wherein the air hole is formed in the top of the outer layer forming die, the air hole is vertically connected with the air channel, and the air channel penetrates through the transition layer and is connected with the transition layer.
Further, the outer layer forming die also comprises a runner channel, wherein the runner channel is positioned on the outer wall of the outer layer forming die and positioned at the bottom of the homogenizing ring arc-shaped continuous blowing cooling runner; the runner channels are connected with a plurality of homogenizing ring arc-shaped continuous blowing cooling runners.
Compared with the prior art, the utility model has the beneficial effects that:
1. the pressure bearing strength is increased through the wave crest part and the wave trough part, the shape of the wave crest part is round due to the arc at the top of the wave crest part, and when the pressure is borne, the pressure is rapidly dispersed, so that the pressure resistance of the pipeline is improved.
2. The rigidity of the ring is enhanced and the production cost is reduced by adjusting the thickness of the laminated wall; the wave crest part is used for sealing the cavity of the high-pressure gas, so that the wave crest part is prevented from deformation when bearing pressure, the ring stiffness is improved, the compressive strength is improved, and the device is suitable for the environment of uneven settlement of soil.
3. Through the involute curvature runner of the outer extrusion nozzle, the sufficient feeding during extrusion molding is ensured, the wave crest is prevented from deforming or cracking, and the ring rigidity of the pipe is improved.
4. The crest and the trough are rapidly cooled and shaped through the uniform circular arc-shaped continuous blowing cooling flow passage, so that the compressive strength and the ring rigidity are enhanced.
Drawings
Fig. 1 is a cross-sectional view of a high pressure resistant HDPE double wall bellows as described.
Fig. 2 is an enlarged view of a portion of the high pressure resistant HDPE double wall bellows.
FIG. 3 is a cross-sectional view of the outer layer extrusion nozzle.
Fig. 4 is a cross-sectional view of the outer layer forming mold.
Fig. 5 is a right side view of the outer layer forming mold in cross section.
Fig. 6 is a left side view of the outer layer forming mold in cross section.
Wherein: 1. an outer layer; 11. a peak portion; 12. trough parts; 13. a cavity; 14. arc angle; 2. an inner layer; 3. laminating the wall thickness; 4. an outer layer extrusion nozzle; 41. an progressive curvature flow path; 5. an outer layer forming mold; 51. a uniform circular arc-shaped continuous blowing cooling runner; 52. an outer layer forming channel; 53. an air hole; 54. an air passage; 55. a transition layer; 56. a flow channel.
Detailed Description
The utility model is described in detail below with reference to the drawings and the detailed description.
Example 1
A high pressure resistant HDPE double-wall corrugated pipe, as shown in figures 1 and 2, comprises an outer layer 1 and an inner layer 2; the inner layer 2 is in a straight cylinder shape, and the inner layer 2 is provided with a through hole; the outer layer 1 is corrugated; the outer layer 1 is provided with alternately distributed wave crest parts 11 and wave trough parts 12; the inside of the crest 11 is provided with a cavity 13 for sealing high-pressure gas; an arc angle 14 for sealing the cavity 13 is arranged between the crest 11 and the trough 12; a laminated wall thickness 3 is arranged between the outer layer 1 and the inner layer 2.
The working principle of the utility model is as follows:
according to the utility model, the pressure of the pipeline is relieved through the quick drainage of the straight cylindrical inner layer, the bearing capacity is enhanced through the wave crest and the wave trough, the bearing strength is enhanced through the cavity used for sealing high-pressure gas in the wave crest part, the corrugated pipe is not easy to deform due to the high-pressure gas in the wave crest part when the corrugated pipe is subjected to external pressure, and the pipeline is suitable for the condition of uneven stress of the pipeline caused by uneven settlement of soil.
In this embodiment, the top end of the crest 11 is provided with an arc, and the two ends of the arc are rounded to form the crest 11 in an arch shape.
In this embodiment, the distance from any crest 11 to another crest 11 is smaller than the distance from any trough 12 to another trough 12, i.e. the outer surface area of the crest 11 is larger than the outer surface area of the trough 12, increasing the bearing capacity.
In this embodiment, the bottom of the cavity 13 has a length greater than that of the top, so that the pressure applied to the top of the peak 11 is dispersed to two sides, and the bearing capacity is increased.
In this embodiment, the inner wall of the inner layer is smooth, the friction resistance is small, the liquid in the pipeline can be conveniently and rapidly discharged, and the pressure born by the pipeline is reduced.
Example 2
The high-pressure-resistant HDPE double-wall corrugated pipe forming module is applied to the high-pressure-resistant HDPE double-wall corrugated pipe in the embodiment 1, and as shown in figures 3 and 4, the forming module comprises an outer layer extrusion nozzle 4 and an outer layer forming die 5; the discharge port of the outer layer extrusion nozzle 4 is connected with the feed port of the outer layer forming die 5; the outer layer forming mold 5 is composed of two structures as shown in fig. 4 combined.
In this embodiment, the outer extrusion nozzle 4 is provided with an involute curvature flow channel 41; the two ends of the involute curvature flow channel 41 are respectively connected with a feed inlet and a discharge outlet of the outer layer extrusion nozzle 4, and the involute curvature flow channel 41 is a channel provided with a plurality of arc-shaped curves; the continuous arc bending prevents accumulation of molten materials and prevents cracks during molding due to insufficient feeding.
More specifically, the outer layer forming mold 5 includes a plurality of uniform annular arc-shaped continuous blowing cooling channels 51 and outer layer forming channels 52 corresponding to the outer layer 1; the outer layer forming mold 5 is hollow, the outer layer forming channel 52 is arranged on the inner wall of the outer layer forming mold 5, the uniform circular arc-shaped continuous blowing cooling channel 51 is arranged on the outer wall of the outer layer forming mold 5, and the uniform circular arc-shaped continuous blowing cooling channel 51 is an arc-shaped channel.
More specifically, as shown in fig. 5 and 6, the outer layer forming mold 5 further includes a transition layer 55, where the transition layer 55 is disposed inside the outer layer forming mold 5 and between the uniform annular arc-shaped continuous blowing cooling channel 51 and the outer layer forming channel 52; the transition layer 55 is annular.
More specifically, the outer layer forming mold 5 further includes an air hole 53 and an air channel 54, the air hole 53 is disposed at the top of the outer layer forming mold 5, the air hole 53 is vertically connected with the air channel 54, and the air channel 54 passes through the transition layer 55 and is connected with the transition layer 55; external air enters the air channel 54 through the air holes 53, the air channel 54 transmits external air to the transition layer 55 to cool the outer layer forming die 5, and the air is discharged through the air channel and the air holes of the other half structure which are communicated.
More specifically, the outer layer forming mold 5 further includes a runner channel 56, and the runner channel 56 is located on the outer wall of the outer layer forming mold 5 and is located at the bottom of the homogenizing ring arc-shaped continuous blowing cooling runner 51; the runner channel 56 is connected with a plurality of uniform circular arc-shaped continuous blowing cooling runners 51; the runner channel 56 is provided with an air inlet and an air outlet, and is externally connected with compressed air, and the compressed air is injected into each homogenizing ring arc-shaped continuous blowing cooling runner 51 through the runner channel 56 to cool the molding machine module, so that the crest part 11 and the trough part 12 are rapidly cooled and molded.
Example 3
A high pressure resistant HDPE double-wall corrugated pipe comprises an outer layer 1 and an inner layer 2; the inner layer 2 is in a straight cylinder shape; the outer layer 1 is corrugated; the outer layer 1 is provided with alternately distributed wave crest parts 11 and wave trough parts 12; the corrugated design of the wave crest part 11 and the wave trough part 12 can enhance the bearing strength when the double-wall corrugated pipe is buried underground; the inside of the crest 11 is provided with a cavity 13 for sealing high-pressure gas; an arc angle 14 for sealing the cavity 13 is arranged between the crest 11 and the trough 12; a laminated wall thickness 3 is arranged between the outer layer 1 and the inner layer 2.
In this embodiment, the top of crest 11 be equipped with the circular arc, the both ends of circular arc carry out the chamfer and handle, make crest 11 take the form of arch, arched crest 11 makes the double-walled bellows pipeline when receiving pressure, can disperse local pressure rapidly, disperses pressure to trough 12, arched design has reduced pressure, avoids crest 11 to receive strong pressure and takes place deformation.
In this embodiment, the distance from any crest 11 to another crest 11 is smaller than the distance from any trough 12 to another trough 12, i.e. the surface area of the crest 11 is larger than the surface area of the trough 12, and increasing the surface area of the crest 11 is beneficial to reducing the pressure when receiving pressure, thereby improving the pressure resistance and the compression strength.
In this embodiment, the length of the bottom of the cavity 13 is greater than that of the top, when the inner layer 2 and the outer layer 1 are welded, high-pressure gas is blown in the middle, and after the inner wall is rotationally pressed in a molten state, a double-wall corrugated pipe with smooth outer surface and corrugated inner wall is manufactured, the inner layer and the outer layer are welded in a lamination way at the trough part, two sides of the crest part are sealed, the inner part of the crest part is sealed by non-flowing high-pressure gas, the welding part of the inner layer and the outer layer is changed into a circular arc angle 14 from a sharp corner under the action of air pressure, the high-pressure gas prevents the crest part 11 from deforming and sinking, the ring stiffness is improved, and the compression strength is improved.
In this embodiment, the inner wall of the inner layer is smooth, the friction resistance is small, the liquid in the pipeline can be conveniently and rapidly discharged, and the pressure born by the pipeline is reduced.
The high-pressure-resistant HDPE double-wall corrugated pipe forming module is applied to the high-pressure-resistant HDPE double-wall corrugated pipe, and comprises an outer layer extrusion nozzle 4 and an outer layer forming die 5; the discharge port of the outer layer extrusion nozzle 4 is connected with the feed port of the outer layer forming die 5.
In this embodiment, the outer extrusion nozzle 4 is provided with an involute curvature flow channel 41; the two ends of the involute curvature flow channel 41 are respectively connected with the feed inlet and the discharge outlet of the outer layer extrusion nozzle 4, the involute curvature flow channel 41 ensures sufficient feed in extrusion molding, and the crest 11 of the outer layer 1 is prevented from deforming or cracking due to insufficient feed or excessive partial feed.
More specifically, the involute curvature flow channel 41 is a channel with a plurality of arc curves.
More specifically, the outer layer forming mold 5 includes a plurality of uniform annular arc-shaped continuous blowing cooling channels 51 and outer layer forming channels 52 corresponding to the outer layer 1; the outer layer forming mold 5 is hollow, the outer layer forming channel 52 is arranged on the inner wall of the outer layer forming mold 5, the uniform circular arc-shaped continuous blowing cooling channel 51 is arranged on the outer wall of the outer layer forming mold 5, and the uniform circular arc-shaped continuous blowing cooling channel 51 is an arc-shaped channel.
More specifically, the outer layer forming mold 5 further includes a transition layer 55, where the transition layer 55 is disposed inside the outer layer forming mold 5 and between the uniform annular arc-shaped continuous blowing cooling channel 51 and the outer layer forming channel 52; the transition layer 55 is annular.
More specifically, the outer layer forming mold 5 further includes an air hole 53 and an air channel 54, the air hole 53 is disposed at the top of the outer layer forming mold 5, the air hole 53 is vertically connected with the air channel 54, and the air channel 54 passes through the transition layer 55 and is connected with the transition layer 55.
The circular arc-shaped continuous blowing cooling flow passage 20 is externally connected with compressed air through the air hole 53 and the air channel 54, so that the wave crest part 11 and the wave trough part 12 are rapidly formed, are firmer and less prone to deformation, and improve the compressive strength.
More specifically, the outer layer forming mold 5 further includes a runner channel 56, and the runner channel 56 is located on the outer wall of the outer layer forming mold 5 and is located at the bottom of the homogenizing ring arc-shaped continuous blowing cooling runner 51; the runner channel 56 is connected with a plurality of uniform circular arc-shaped continuous blowing cooling runners 51; the runner channel 56 is provided with an air inlet and an air outlet, and is externally connected with compressed air, and the compressed air is injected into each homogenizing ring arc-shaped continuous blowing cooling runner 51 through the runner channel 56 to cool the molding machine module, so that the crest part 11 and the trough part 12 are rapidly cooled and molded.
The molten material is extruded through the outer layer extrusion nozzle 4, and is gradually molded through the outer layer molding channel 52 under the rotary pressing action of the mold core and the outer layer molding mold 5, and air in the transition layer 55 and the homogenizing ring arc-shaped continuous blowing cooling flow channel 51 cools down the outer layer molding mold 5, so that the crest part 11 and the trough part 10 are rapidly molded, the ring stiffness of the pipeline is enhanced, and the compression resistance of the pipeline is increased.
It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (10)
1. The high-pressure-resistant HDPE double-wall corrugated pipe is characterized by comprising an outer layer (1) and an inner layer (2); the inner layer (2) is in a straight cylinder shape; the outer layer (1) is of a corrugated structure; the corrugated structure comprises wave crest portions (11) and wave trough portions (12) which are alternately distributed; a cavity (13) for sealing high-pressure gas is arranged in the crest part (11); an arc angle (14) for sealing the cavity (13) is arranged between the crest part (11) and the trough part (12); a laminated wall thickness (3) is arranged between the outer layer (1) and the inner layer (2).
2. The high pressure resistant HDPE double-wall corrugated pipe according to claim 1, wherein the peak (11) has a rounded structure at both ends, so that the peak (11) is arched.
3. A high pressure resistant HDPE double wall corrugated pipe according to claim 1, wherein the distance from any one crest (11) to the other crest (11) is smaller than the distance from any one trough (12) to the other trough (12).
4. A high pressure resistant HDPE double wall bellows according to claim 1, wherein the bottom of the cavity (13) has a length greater than the length of the top.
5. A forming module of the high-pressure-resistant HDPE double-wall corrugated pipe, which is applied to the high-pressure-resistant HDPE double-wall corrugated pipe as claimed in any one of claims 1 to 4, and is characterized in that the forming module comprises an outer layer extrusion nozzle (4) and an outer layer forming die (5); the discharge port of the outer layer extrusion nozzle (4) is connected with the feed port of the outer layer forming die (5).
6. The forming module of the high-pressure resistant HDPE double-wall corrugated pipe according to claim 5, wherein the outer layer extrusion nozzle (4) is provided with an gradually-opened curvature flow passage (41); two ends of the involute curvature flow channel (41) are respectively connected with a feed inlet and a discharge outlet of the outer layer extrusion nozzle (4); the involute curvature flow channel (41) is provided with a plurality of arc-shaped curved channels.
7. The forming module of the high-pressure resistant HDPE double-wall corrugated pipe according to claim 6, wherein the outer layer forming die (5) comprises a plurality of uniform annular arc-shaped continuous blowing cooling channels (51) and outer layer forming channels (52) corresponding to the outer layer (1); the inner part of the outer layer forming die (5) is hollow, the outer layer forming channel (52) is arranged on the inner wall of the outer layer forming die (5), the uniform circular arc-shaped continuous blowing cooling flow channel (51) is arranged on the outer wall of the outer layer forming die (5), and the uniform circular arc-shaped continuous blowing cooling flow channel (51) is an arc-shaped channel.
8. The forming module of the high-pressure-resistant HDPE double-wall corrugated pipe according to claim 5, wherein the outer layer forming die (5) further comprises a transition layer (55), the transition layer (55) is arranged in the outer layer forming die (5) and is arranged between the uniform circular arc-shaped continuous blowing cooling flow passage (51) and the outer layer forming passage (52); the transition layer (55) is annular.
9. The high-pressure-resistant HDPE double-wall corrugated pipe forming module according to claim 8, wherein the outer layer forming die (5) further comprises an air hole (53) and an air channel (54), the air hole (53) is arranged at the top of the outer layer forming die (5), the air hole (53) is vertically connected with the air channel (54), and the air channel (54) penetrates through the transition layer (55) and is connected with the transition layer (55).
10. The forming module of the high-pressure-resistant HDPE double-wall corrugated pipe according to claim 9, wherein the outer layer forming die (5) further comprises a runner channel (56), the runner channel (56) is positioned on the outer wall of the outer layer forming die (5) and positioned at the bottom of the uniform circular arc-shaped continuous blowing cooling runner (51); the runner channels (56) are connected with a plurality of uniform circular arc-shaped continuous blowing cooling runners (51).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320051124.7U CN219327854U (en) | 2023-01-05 | 2023-01-05 | High-pressure-resistant HDPE double-wall corrugated pipe and forming module thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320051124.7U CN219327854U (en) | 2023-01-05 | 2023-01-05 | High-pressure-resistant HDPE double-wall corrugated pipe and forming module thereof |
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| CN219327854U true CN219327854U (en) | 2023-07-11 |
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| CN202320051124.7U Active CN219327854U (en) | 2023-01-05 | 2023-01-05 | High-pressure-resistant HDPE double-wall corrugated pipe and forming module thereof |
Country Status (1)
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| CN (1) | CN219327854U (en) |
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2023
- 2023-01-05 CN CN202320051124.7U patent/CN219327854U/en active Active
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