CN117212565A - Pipe based on special-shaped strip winding reinforcement - Google Patents
Pipe based on special-shaped strip winding reinforcement Download PDFInfo
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- CN117212565A CN117212565A CN202311341882.3A CN202311341882A CN117212565A CN 117212565 A CN117212565 A CN 117212565A CN 202311341882 A CN202311341882 A CN 202311341882A CN 117212565 A CN117212565 A CN 117212565A
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- 238000004804 winding Methods 0.000 title claims abstract description 43
- 230000002787 reinforcement Effects 0.000 title abstract description 7
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 29
- 230000001154 acute effect Effects 0.000 claims abstract description 13
- 239000004033 plastic Substances 0.000 claims description 52
- 229920003023 plastic Polymers 0.000 claims description 52
- 239000012943 hotmelt Substances 0.000 claims description 43
- 238000001816 cooling Methods 0.000 claims description 17
- 238000005452 bending Methods 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000009432 framing Methods 0.000 claims 1
- 229920001169 thermoplastic Polymers 0.000 claims 1
- 239000004416 thermosoftening plastic Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
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- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a pipe based on special-shaped strip winding reinforcement, wherein the outer wall of a pipe body is provided with a hollow reinforcing rib formed by winding a special-shaped strip; the special-shaped strips used as the outer walls of the pipes to form the hollow reinforcing ribs are formed into two hollow frame strips connected through the bottom strip, so that the special-shaped strips are easy to cool and form and are beneficial to production and manufacture, and especially, any side wall of each hollow frame strip is formed into a non-vertical inward-inclined acute angle structure, and the other side wall of each hollow frame strip is formed into an inward-inclined acute angle structure or a vertical structure.
Description
Technical Field
The invention relates to a plastic pipeline technology, in particular to a plastic structure wall pipe, and specifically relates to a corrugated pipe based on special-shaped strip winding reinforcement.
Background
The plastic winding structure wall pipe is a pipeline formed by spirally winding extruded hot-melt plastic strips on winding equipment, and is widely applied to engineering projects such as buried drainage, pollution discharge and the like. Because such pipes need to be buried in deep underground, the compression ring stiffness (external compression strength) of the pipes is very important for the pipes, and the most economical way to increase the ring stiffness of plastic pipes is to form protruding reinforcing ribs such as corrugated pipes, internally ribbed pipes, etc. on the outer walls of the pipes, which is very widely used due to the increased ring stiffness at economical material cost.
In summary, how to form the reinforcing ribs on the outer wall of the pipe is an innovation hot spot in the technical field, and many mature technologies exist in the prior art, but most of the technologies mainly have the following technical problems: 1. the internal structure of the reinforcing rib is mainly single cavity or double cavity, and there are few stable three cavities or triangle internal supporting ribs, which is mainly limited by the cooling problem in the plastic forming technology, because the reinforcing rib is formed by sintering a strip or a strip, and the strip is formed by cooling and shaping after hot melting extrusion of plastic, and the cooling and shaping is generally completed by taking high temperature heat away from the strip in a molten state under the condition that the strip is adsorbed and shaped on the outer wall of the strip by a vacuum adsorption die in a water tank. Therefore, the strip cannot have an inner wall surface dividing two cavities, that is, so-called inner ribs, which cannot be cooled rapidly due to the inability to contact the vacuum suction die and the flowing cooling water, and therefore have an insurmountable obstacle in manufacturing. 2. The supporting structure inside the most reinforcing ribs in the prior art is basically a single-wall supporting inner rib, the supporting inner rib is generally formed by fusing two outer walls of the strip material when the two outer walls are wound, the supporting inner rib of the single-wall structure is easy to fall down when being pressed too much, the stability is not as good as that of a triangular supporting structure, but the triangular supporting structure is formed inside the reinforcing ribs, and the problem that the strip material in the step 1 is difficult to cool occurs. The invention aims to solve the problems in the prior art by designing a novel special-shaped strip structure, being easy to cool and form, and simultaneously being capable of forming a triangular inner support by skillfully utilizing the physical and mechanical principle during use.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a pipe having a structure which is easy to cool and form and which can naturally incline to form a stable triangular support hollow reinforcing rib when being wound cold-bent.
In order to achieve the technical purpose, the scheme of the invention is as follows: a tube based on special-shaped strip winding reinforcement comprises a tube body with smooth inner and outer walls, wherein the tube body is formed by winding and lapping hot-melt plastic flat strips through winding equipment, and the outer wall of the tube body is provided with hollow reinforcing ribs formed by winding special-shaped strips; the special-shaped strip is provided with a longitudinally extending bottom strip, and longitudinally extending hollow frame strips are respectively arranged on the left side and the right side of the bottom strip in the transverse direction and are mutually isolated; each hollow frame strip has an inner side wall, an outer side wall and a top wall; the sum of the heights of the inner side walls of the two hollow frame belts is larger than the maximum distance between the two inner side walls; wherein each of the inner and outer side walls of the hollow frame strip intersect the base strip at an acute angle with a direction toward the other hollow frame strip, or one of the inner and outer side walls of each of the hollow frame strip intersects the base strip perpendicularly and the other side wall intersects the base strip at an acute angle with a direction toward the other hollow frame strip.
Preferably, the special-shaped strip is wrapped with a layer of hot melt plastic integrally and then wound on the pipe body; when the special-shaped strip is wound, the hollow frame belts on two sides are mutually inclined under the action of winding bending stress so that the two inner side walls are close, the hot-melt plastic fuses the special-shaped strip and the outer wall of the pipe body and fuses the tops of the two inner side walls which are close to each other, and after cooling, a hollow reinforcing rib with a cross section provided with three closed cavities is formed, wherein the cross section of the middle cavity is of a stable triangular structure.
Preferably, after hot melt plastics are injected into the middle parts of the two hollow frame belts of the special-shaped strip, the special-shaped strip is wrapped with a layer of hot melt plastics integrally and then wound on the pipe body; when the special-shaped strip is wound, the hollow frame belts on the two sides are mutually inclined under the action of winding bending stress so that the two inner side walls are close, the hot-melt plastic fuses the special-shaped strip and the outer wall of the pipe body and fuses the two inner side walls which are close to each other, and after cooling, a hollow reinforcing rib with a left closed cavity and a right closed cavity and a stable triangular support rib in the middle is formed.
Preferably, the special-shaped strip is formed by cooling and shaping through a vacuum adsorption water tank after hot melt plastic is extruded through an extrusion die.
In order to further enhance the strength, steel wires are embedded in the bottom belt of the special-shaped strip, and the steel wires are placed in the bottom belt of the special-shaped strip from an extrusion die.
As a further improvement, after the special-shaped strip wraps the hot-melt plastic layer and is wound on the pipe body, the steel wire is wound into the hot-melt plastic corresponding to the top wall of the special-shaped strip before the hot-melt plastic is cooled.
As a further improvement, the height of the inner side wall of the hollow frame belt of the special-shaped belt material is higher than that of the outer side wall, and the top wall and the bottom belt are in non-parallel construction.
The beneficial effect of this scheme is: the special-shaped strips used as the outer walls of the pipes to form the hollow reinforcing ribs are constructed into two hollow frame strips connected through the bottom strip, so that the hollow frame strips are easy to cool and form and are beneficial to production and manufacture, in particular, any side wall of each hollow frame strip is constructed into a non-vertical inward-inclined acute angle structure, the other side wall is of the same inward-inclined acute angle structure or a vertical structure, the left and right hollow frame strips are mutually inclined due to the internal stress formed by cold bending when the outer walls of the pipes are wound, the inner walls of the two hollow frame strips are close to each other, and further stable triangular supports are ingeniously formed, so that the structural strength of the reinforcing ribs is greatly enhanced, and meanwhile, certain internal stress is correspondingly counteracted.
Drawings
FIG. 1 is a schematic perspective view of a profiled strip in accordance with the present invention;
FIG. 2 is a schematic cross-sectional view of a profiled strip in accordance with the invention;
FIG. 3 is a schematic perspective view of a plastic wrap pipe according to a first embodiment of the present invention;
FIG. 4 is an axial cross-sectional schematic view of FIG. 3;
FIG. 5 is an enlarged view of the portion A of FIG. 4;
FIG. 6 is a schematic perspective view of a plastic wrap pipe according to a second embodiment of the present invention;
FIG. 7 is an axial cross-sectional schematic view of FIG. 6;
FIG. 8 is an enlarged view of the portion B of FIG. 7;
fig. 9 is a schematic view of an added steel wire in a preferred embodiment of the present invention.
Wherein: the special-shaped strip 1, the pipe body 2, the hot melt plastic 3, the steel wire 4, the bottom belt 11, the outer side wall 12, the inner side wall 13, the top wall 14, the acute angle 15, the left cavity 16, the right cavity 17, the middle cavity 18 and the triangular support rib 19.
Detailed Description
The invention is further illustrated in the following, in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. It is needless to say that the person skilled in the art realizes that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive in scope.
The plastic winding pipe, the pipe body, the special-shaped strip, the hot-melt plastic and the like related in the invention are mainly made of plastics, such as PE, PP, composite plastic and the like, the fusion adopts materials with hot-melt mutual adhesion performance, and the specific plastic materials are selected by the person skilled in the art according to the prior art and performance requirements, which are all known techniques in the pipeline field and are not further described herein.
The innovation core of the invention is to provide a special-shaped strip for reinforcing pipes, as shown in fig. 1, 2 and 3, wherein the strip is used for winding on the outer wall of the pipe to form hollow reinforcing ribs for reinforcing the ring rigidity of the pipe, the special-shaped strip is not used for directly forming the pipe, unlike the strip in the inner rib reinforced outer corrugation type of the patent of 201110121186.2, the strip of the 201110121186.2 patent is similar to the patent in shape, but the strip is directly formed by winding on a winding device and bonding in parallel side directions to manufacture a pipe body with the hollow reinforcing ribs, the hollow reinforcing ribs are formed by fusing the outer side walls of cavities of adjacent strips after the strip is spirally wound, moreover, the inner wall of the pipe formed by bonding in parallel side directions after the strip is cooled and shaped is very unsmooth, obvious bonding marks are formed, and the pipe supported by bonding in parallel side directions always has hidden danger in the axial tensile property.
As shown in fig. 1 and 2, the special-shaped strip of the invention is provided with a bottom strip 11 extending longitudinally, a left hollow frame strip and a right hollow frame strip extending longitudinally are respectively arranged on the left side and the right side of the bottom strip 11 in the transverse direction, and the hollow frame strips on the left side and the right side are mutually isolated; each hollow frame strip has an inner side wall 13 and an outer side wall 12 and a top wall 14; wherein, the inner side wall refers to the side wall positioned at the middle position of the bottom belt 11, and the outer side wall refers to the side wall positioned at the side position of the bottom belt 11.
Of great importance in the solution of the invention is: either of the inner and outer side walls of each hollow frame strip is inclined in a direction toward the other hollow frame strip, while the other side wall is perpendicular to the base strip and cannot be inclined in a direction away from the other hollow frame strip (which would otherwise result in uncertainty in the direction in which the hollow frame strip would fall upon winding bending); it is also possible that the inner side wall and the outer side wall of each hollow frame strip are inclined in a direction towards the other hollow frame strip. The inclination is structurally embodied in that the side walls and the bottom belt are intersected at an acute angle, and the specific angle is correspondingly selected and adjusted by a person skilled in the art according to the condition that the special-shaped belt needs to be bent, but the special-shaped belt is in an acute angle category, and the main effect of the structural characteristics is that the two hollow frame belts can be guided to incline to be close to each other by using stress generated by bending, namely, when the special-shaped belt with the structure is wound, the hollow frame belts on two sides incline to each other under the action of winding bending stress so as to enable the two inner side walls to be close to each other, the special-shaped belt naturally forms a high-strength stable triangular structure in cold bending, so that the structural strength of the reinforcing rib formed by the special-shaped belt is difficult to collapse or be damaged by collision, and a stable foundation is created for further heightening the reinforcing rib by overlapping the winding top rib on the top of the special-shaped belt.
In order to ensure that the cross section of the intermediate chamber formed by the oblique abutment of the two inner side walls 13 is a stable triangular structure, the principle that the sum of the lengths of the two sides of the triangle is greater than that of the third side must be satisfied, and therefore, the sum of the heights of the inner side walls 13 of the two hollow frame belts must be greater than the maximum distance between the two inner side walls.
The special-shaped strip 1 is formed by cooling and shaping through a vacuum adsorption water tank after being extruded by hot melt plastic through an extrusion die. To further enhance the increase in rigidity of the tube ring after the profiled strip is wound, a reinforcing steel wire 4 may be embedded in the bottom strip 11 of the profiled strip as shown in fig. 9; the steel wire 4 is placed into the bottom band of the profiled strip from the extrusion die. As a further optimization, after the special-shaped strip wraps the hot-melt plastic layer and is wound on the pipe body, the steel wire 4 is wound into the hot-melt plastic corresponding to the top wall of the special-shaped strip before the hot-melt plastic is cooled.
As a specific embodiment of the invention, as shown in fig. 3, 4 and 5, the tube based on special-shaped strip winding reinforcement in the drawing comprises a tube body 2 with smooth inner and outer walls, which is formed by winding hot-melt plastic flat strips through winding equipment, wherein the outer wall of the tube body 2 is provided with hollow reinforcing ribs formed by winding the special-shaped strips 1; the special-shaped strip 1 is wrapped with a layer of hot melt plastic 3 and then wound on the pipe body 2, and is generally wound when the pipe body 2 is also in a hot melt state, so that the pipe body 2 and the special-shaped strip 1 can be fused (i.e. bonded together) well; based on the aforementioned acute angle structural feature of the side walls of the profiled strip 1, when the profiled strip 1 is wound, the hollow frame strips on two sides naturally incline to each other under the action of winding bending stress, the inclination can make two adjacent inner side walls in the profiled strip approach each other (two top walls can also approach each other naturally), the hot-melt plastic 3 fuses the profiled strip and the outer wall of the pipe body and fuses the tops of the two inner side walls approaching each other (i.e. the contact parts of the two top walls), the hot-melt plastic 3 forms hollow reinforcing ribs with three closed cavities in cross section after cooling, namely, left cavities 16 and right cavities 17 on the left side and the right side, and middle cavities 18 formed by the inclination of cold bending in the middle, wherein the cross section of the middle cavities 18 is in a stable triangle structure as shown in fig. 5. In the background technology, emphasis is placed on that if the strip with the three closed cavities is directly extruded by a die, because the cooling problem is difficult to achieve, even if the cooling problem is achieved, the production efficiency is low due to the cooling problem, and the production cost is very high.
As a second embodiment of the present invention, as shown in fig. 6, 7 and 8, the tube material based on profiled strip winding reinforcement in the drawings comprises a tube material body 2 with smooth inner and outer walls formed by winding and lap-jointing hot-melt plastic flat strips through winding equipment, wherein the outer wall of the tube material body 2 is provided with hollow reinforcing ribs formed by winding the profiled strips 1; injecting hot melt plastic 3 into the middle part of the two hollow frame belts of the special-shaped strip 1, wrapping the special-shaped strip 1 with a layer of hot melt plastic 3, and winding the special-shaped strip on the pipe body 2; the pipe body 2 is wound in a hot melt state, so that the pipe body 2 and the special-shaped strip 1 can be fused (i.e. bonded together) well; based on the aforementioned acute angle structural characteristics of the side walls of the profiled strip 1, when the profiled strip 1 is wound, the hollow frame strips on two sides naturally incline to each other under the action of winding bending stress, the inclination can enable two adjacent inner side walls in the profiled strip to be close to each other (two top walls can be close to each other naturally), the hot-melt plastic fuses the profiled strip and the outer wall of the pipe body and fuses the two inner side walls close to each other (based on the filling of the hot-melt plastic), the hot-melt plastic after cooling is wound on the profiled strip 1 to form hollow reinforcing ribs with left and right closed cavities and middle stable triangular support ribs on the cross section, namely, left and right cavities 16 and 17 on the left and right sides, and inner side walls and hot-melt plastic fusion on the middle inclined to each other due to cold bending form stable triangular support ribs 19, wherein the cross section of the stable triangular support ribs 19 is in a stable triangular structure as shown in fig. 8. In the background technology, emphasis is placed on that if the strip with the internal structure is directly extruded by a die, because of the cooling problem, the production efficiency is low due to the cooling problem, and the production cost is very high.
The foregoing has shown and described the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a tubular product based on abnormal shape strip winding reinforcing, includes the smooth tubular product body of inside and outside wall that adopts hot melt plastics flat strip to twine overlap joint shaping via winding equipment, its characterized in that: the outer wall of the pipe body is provided with a hollow reinforcing rib formed by winding a special-shaped strip; the special-shaped strip is provided with a longitudinally extending bottom strip, and longitudinally extending hollow frame strips are respectively arranged on the left side and the right side of the bottom strip in the transverse direction and are mutually isolated; each hollow frame strip has an inner side wall, an outer side wall and a top wall; the sum of the heights of the inner side walls of the two hollow frame belts is larger than the maximum distance between the two inner side walls; wherein each of the inner and outer side walls of the hollow frame strip intersect the base strip at an acute angle with a direction toward the other hollow frame strip, or one of the inner and outer side walls of each of the hollow frame strip intersects the base strip perpendicularly and the other side wall intersects the base strip at an acute angle with a direction toward the other hollow frame strip.
2. The profiled strip winding reinforced pipe as claimed in claim 1 wherein the profiled strip is integrally wrapped with a layer of hot melt plastic and then wound onto the pipe body; when the special-shaped strip is wound, the hollow frame belts on two sides are mutually inclined under the action of winding bending stress so that the two inner side walls are close, the hot-melt plastic fuses the special-shaped strip and the outer wall of the pipe body and fuses the tops of the two inner side walls which are close to each other, and after cooling, a hollow reinforcing rib with a cross section provided with three closed cavities is formed, wherein the cross section of the middle cavity is of a stable triangular structure.
3. The reinforced pipe based on the winding of the special-shaped strip according to claim 1, wherein after hot melt plastic is injected into the middle part of the two hollow frame strips of the special-shaped strip, the special-shaped strip is wrapped with a layer of hot melt plastic integrally and then wound on the pipe body; when the special-shaped strip is wound, the hollow frame belts on the two sides are mutually inclined under the action of winding bending stress so that the two inner side walls are close, the hot-melt plastic fuses the special-shaped strip and the outer wall of the pipe body and fuses the two inner side walls which are close to each other, and after cooling, a hollow reinforcing rib with a left closed cavity and a right closed cavity and a stable triangular support rib in the middle is formed.
4. A reinforced pipe based on profiled strip winding as claimed in any one of claims 1 to 3, wherein the profiled strip is shaped by cooling in a vacuum absorption tank after extrusion of the hot melt plastic through an extrusion die.
5. The tube of claim 4, wherein the bottom band of the profiled strip is embedded with steel wires, which are placed into the bottom band of the profiled strip from an extrusion die.
6. A profiled strip winding reinforced pipe as claimed in claim 2 or claim 3 wherein after the profiled strip is wrapped around the pipe body with a layer of hot melt plastic, the steel wire is wound into the corresponding hot melt plastic of the profiled strip top wall before the hot melt plastic cools.
7. The profiled strip winding reinforced pipe of claim 5, wherein after the profiled strip wrapped thermoplastic layer is wound around the pipe body, the steel wire is wound into the corresponding hot melt plastic of the profiled strip top wall before the hot melt plastic cools.
8. A profiled strip winding reinforced pipe as claimed in any one of claims 1 to 3 wherein the hollow framing strip of the profiled strip has an inner side wall height which is higher than an outer side wall height, the top and bottom strips being of non-parallel configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311341882.3A CN117212565A (en) | 2023-10-17 | 2023-10-17 | Pipe based on special-shaped strip winding reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311341882.3A CN117212565A (en) | 2023-10-17 | 2023-10-17 | Pipe based on special-shaped strip winding reinforcement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117212565A true CN117212565A (en) | 2023-12-12 |
Family
ID=89048188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311341882.3A Pending CN117212565A (en) | 2023-10-17 | 2023-10-17 | Pipe based on special-shaped strip winding reinforcement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117212565A (en) |
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2023
- 2023-10-17 CN CN202311341882.3A patent/CN117212565A/en active Pending
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