CN112610781A - Thermoplastic reinforced plastic composite pipe end boss structure and preparation method thereof - Google Patents
Thermoplastic reinforced plastic composite pipe end boss structure and preparation method thereof Download PDFInfo
- Publication number
- CN112610781A CN112610781A CN202011350053.8A CN202011350053A CN112610781A CN 112610781 A CN112610781 A CN 112610781A CN 202011350053 A CN202011350053 A CN 202011350053A CN 112610781 A CN112610781 A CN 112610781A
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- pipe
- reinforced plastic
- plastic composite
- thermoplastic reinforced
- composite pipe
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- 239000002990 reinforced plastic Substances 0.000 title claims abstract description 62
- 239000002131 composite material Substances 0.000 title claims abstract description 59
- 229920001169 thermoplastic Polymers 0.000 title claims abstract description 59
- 239000004416 thermosoftening plastic Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims description 22
- 239000012815 thermoplastic material Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/02—Welded joints; Adhesive joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
- B29C66/022—Mechanical pre-treatments, e.g. reshaping
- B29C66/0224—Mechanical pre-treatments, e.g. reshaping with removal of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention provides a thermoplastic reinforced plastic composite pipe end boss which comprises an outer pipe, a reinforcing layer, an inner pipe, an outer sleeve and an inner lining, wherein a sawtooth structure is arranged on the inner surface of the outer sleeve to increase friction force, and a sealing groove is arranged to prevent a medium from leaking along a gap, so that the stability of the boss structure is ensured to the maximum extent, and the problem that the leakage is caused by easy disengagement due to unstable state in the traditional buckling and pressing mode is solved; meanwhile, in the preparation process, the lining or the substitute plays a supporting role on the thermoplastic reinforced plastic composite pipe, and the problems that the thermoplastic reinforced plastic composite pipe is easily damaged by a buckling and pressing process and the service life is influenced are solved.
Description
Technical Field
The invention belongs to the technical field of composite pipes, and particularly relates to a boss structure of a thermoplastic reinforced plastic composite pipe end and a preparation method thereof.
Background
With the ever-increasing total amount of industry nowadays, the demand for energy in industrial production is also increasing. Pipeline transportation is becoming more and more popular in the market as one of the most economical forms of energy transmission. Due to the particularity of energy sources, ordinary steel pipes cannot be used for long-term stable pipeline transportation because the ordinary steel pipes are easy to corrode. With the progress of technology, plastic pipes represented by thermoplastic reinforced plastic composite pipes (RTP) have been vigorously developed and applied to various fields.
The thermoplastic reinforced plastic composite pipe (RTP) has the outstanding advantage of withstanding high pressure by reinforcement, but is also susceptible to leakage problems when two thermoplastic reinforced plastic composite pipes (RTP) are connected. The connector of compound pipe (RTP) of present thermoplasticity reinforced plastics generally adopts simple withhold the form, promptly: the inner lining is inserted into the thermoplastic reinforced plastic composite pipe (RTP), and the outer sleeve of the thermoplastic reinforced plastic composite pipe (RTP) is directly buckled and pressed by a pipe reducing machine. In this connection: when the pipe reducing machine buckles the outer sleeve of the thermoplastic reinforced plastic composite pipe (RTP), the buckling pressure is too low, and the inner liner is easy to separate from the thermoplastic reinforced plastic composite pipe (RTP) to cause leakage; the buckling pressure is too high, so that the thermoplastic reinforced plastic composite pipe (RTP) is easily damaged, and the service life of the thermoplastic reinforced plastic composite pipe (RTP) is shortened. Meanwhile, the long-term vibration caused by the flowing of the fluid in the pipeline is easy to cause the detachment of the thermoplastic reinforced plastic composite pipe (RTP) from the lining.
Disclosure of Invention
In order to solve the defects of the prior art, the boss structure of the end of the thermoplastic reinforced plastic composite pipe is provided, so that the problems that the leakage is easy to occur due to the unstable state of the traditional buckling and pressing mode and the thermoplastic reinforced plastic composite pipe is easy to be damaged by the buckling and pressing process can be solved.
The invention provides a thermoplastic reinforced plastic composite pipe end boss structure for realizing the aim of the invention, which is characterized in that: including compound pipe of thermoplasticity reinforced plastic, overcoat and inside lining, the compound pipe of thermoplasticity reinforced plastic is including outer tube, enhancement layer and inner tube, the outer tube wraps up in the enhancement layer surface, and the end flushes, the enhancement layer wraps up in the surface of inner tube, the tip of inner tube surpasss outer tube, enhancement layer certain length, the internal surface of overcoat is provided with zigzag structure for the surface of embedding outer tube increases the friction, the internal surface rightmost end of overcoat is provided with a plurality of seal grooves, for avoid liquid to pass through the gap entering enhancement layer with the tip cooperation of inner tube, the surface of inside lining and the internal surface interference fit of inner tube.
As a further improvement of the scheme, the wall thickness of the outer sleeve is 5 mm-8 mm, and the wall thickness of the lining is 0mm or 4 mm-8 mm.
As a further improvement of the above scheme, the material of the outer sleeve is made of metal material or thermoplastic material which is the same as the material of the outer tube.
A method for preparing a boss structure at the end of a thermoplastic reinforced plastic composite pipe is characterized by comprising the following steps: the method comprises the following steps:
And 2, placing the outer sleeve in an outer mold of the mold or sleeving the outer pipe of the thermoplastic reinforced plastic composite pipe, and sleeving the inner liner on an inner mold of the preparation mold.
And 3, heating the inner part and the outer part of the pipe ends of the outer pipe and the inner pipe simultaneously.
And 4, fixing the thermoplastic reinforced plastic composite pipe through a clamping device, pushing the mold along the direction of the thermoplastic reinforced plastic composite pipe by using a hydraulic cylinder until the exposed and softened inner pipe fills the whole sealing groove or gap, and pulling out the mold.
And 5, buckling and pressing the outer sleeve by using a pipe reducing machine to ensure that the sawtooth structure of the outer sleeve is embedded into the outer surface of the outer pipe, wherein the embedding amount is 1.5 mm.
As a further improvement of the scheme, the heating mode in the step 2 is oven heating or heating by a heating ring and a heating rod, the temperature is 165-175 ℃, and the heating time is 5-15 min.
The invention has the beneficial effects that:
compared with the prior art, the lug boss structure of the thermoplastic reinforced plastic composite pipe end is characterized in that the sawtooth structure is arranged on the inner surface of the outer sleeve to increase friction force, and a buckling and pressing mode is adopted in the preparation process, so that the stability of the lug boss structure is ensured to the maximum extent, and the problem of leakage caused by easy disengagement due to unstable state in the traditional buckling and pressing mode is solved; meanwhile, in the preparation process, the lining or the substitute plays a supporting role on the thermoplastic reinforced plastic composite pipe, and the problems that the thermoplastic reinforced plastic composite pipe is easily damaged by a buckling and pressing process and the service life is influenced are solved.
Drawings
FIG. 1 is a schematic diagram of the general structure of the present invention;
FIG. 2 is a cross-sectional view of the general construction of the present invention;
FIG. 3 is a cross-sectional view of the overall construction of a liner of the present invention having a thickness of 0 mm;
FIG. 4 is a cross-sectional view of a thermoplastic reinforced plastic composite tube structure of the present invention;
FIG. 5 is a schematic view of the installation of the mold for a liner of the present invention having a wall thickness of 4mm to 8 mm;
FIG. 6 is a schematic view of the overall installation of the liner of the present invention having a wall thickness of 4mm to 8 mm;
FIG. 7 is a schematic view of the installation of a mold for a liner of 0mm thickness according to the present invention;
FIG. 8 is a schematic view of the overall installation of the liner of the present invention having a thickness of 0 mm;
FIG. 9 is a schematic view of the general construction of the outer jacket of the present invention when it is a thermoplastic material that is the same as the outer tube material;
figure 10 is a schematic view of the installation of the sheath of the present invention in the same thermoplastic material as the outer tube material.
Wherein: 1-thermoplastic reinforced plastic composite pipe, 2-outer sleeve, 3-inner liner, 4-outer pipe, 5-reinforcing layer, 6-inner pipe, 7-outer mold, 8-inner mold, 9-heating ring and heating rod.
Detailed Description
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
example 1
As shown in figures 1 and 2, the invention relates to a boss structure of a thermoplastic reinforced plastic composite pipe end, the boss structure comprises an outer sleeve (2), an inner liner (3), an outer pipe (4), a reinforcing layer (5) and an inner pipe (6), the outer layer (4) is wrapped on the outer surface of the reinforcing layer (5), the tail ends of the outer layer and the reinforcing layer are flush, the reinforcing layer (5) is wrapped on the outer surface of the inner pipe (6), the end part of the inner pipe (6) exceeds the outer pipe (4) and the reinforcing layer (5) by a certain length, the outer sleeve (2) is made of metal materials, the wall thickness of the outer sleeve is 5 mm-8 mm, the strength of the outer sleeve meets the requirement, meanwhile, the inner surface is provided with a sawtooth-shaped structure and is embedded into the outer surface of the outer pipe (4) to increase friction, in addition, the rightmost end of the inner surface is provided with a plurality of sealing grooves, the sealing, the wall thickness of inside lining (3) is 4mm ~ 8mm for guarantee intensity satisfies the requirement, and the internal surface interference fit of surface and inner tube (6) simultaneously guarantees to contact evenly with the internal surface of inner tube (6), thereby plays the supporting role in intraductal and avoids withholding technology in the preparation process and cause the damage to the thermoplasticity pipe.
Fig. 5-6 show a method for preparing a boss structure at the end of a thermoplastic reinforced plastic composite pipe, which is characterized in that: the method comprises the following steps:
And 2, placing the outer sleeve (2) in an outer mold (7) of the mold, and sleeving the lining (3) on an inner mold (8) for preparing the mold.
And 3, uniformly heating the inner part and the outer part of the pipe ends of the outer pipe (4) and the inner pipe (6) at 165 ℃ by using an oven for 15 minutes.
And 4, fixing the thermoplastic reinforced plastic composite pipe (1) through a clamping device, pushing the die in the direction of the thermoplastic reinforced plastic composite pipe (1) by using a hydraulic cylinder until the exposed and softened inner pipe (6) fills the whole sealing groove, and then pulling out the die.
And 5, buckling and pressing the outer sleeve (2) by using a pipe reducing machine to ensure that the sawtooth structure of the outer sleeve (2) is embedded into the outer surface of the outer pipe (4), wherein the embedding amount is 1.5 mm.
Example 2
Referring to fig. 1 and fig. 3, which are views of a composite pipe end boss structure of thermoplastic reinforced plastic, the invention provides a composite pipe end boss structure of thermoplastic reinforced plastic, the boss structure comprises an outer sleeve (2), an outer pipe (4), a reinforcing layer (5) and an inner pipe (6), wherein the outer layer (4) is wrapped on the outer surface of the reinforcing layer (5), the tail ends of the reinforcing layers are flush, the reinforcing layer (5) is wrapped on the outer surface of the inner pipe (6), the end part of the inner pipe (6) exceeds the outer pipe (4) and the reinforcing layer (5) for a certain length, the outer sleeve (2) is made of metal material and has a wall thickness of 5 mm-8 mm so as to ensure that the strength meets the requirement, meanwhile, the inner surface is provided with a sawtooth structure which is embedded into the outer surface of the outer pipe (4) to increase friction, in addition, the rightmost end of the inner surface is provided with a plurality of sealing grooves which are used for being matched with the end part of the inner pipe (6) to prevent liquid from entering the reinforcing layer (5) through gaps.
Fig. 7-8 show a method for preparing a boss structure at the end of a thermoplastic reinforced plastic composite pipe, which is characterized in that: the method comprises the following steps:
And 2, placing the outer sleeve (2) in an outer die (7) of the die.
And 3, uniformly heating the inner part and the outer part of the pipe ends of the outer pipe (4) and the inner pipe (6) at 175 ℃ by using an oven for 5 minutes.
And 4, fixing the thermoplastic reinforced plastic composite pipe (1) through a clamping device, pushing the die in the direction of the thermoplastic reinforced plastic composite pipe (1) by using a hydraulic cylinder until the exposed and softened inner pipe (6) fills the whole sealing groove, and then pulling out the die.
And 5, inserting a solid bar into the inner pipe (6) of the thermoplastic reinforced plastic composite pipe to avoid the damage of the thermoplastic reinforced plastic composite pipe caused by too large pressure during buckling, and buckling the outer sleeve (2) by using a pipe reducing machine to ensure that the sawtooth structure of the outer sleeve (2) is embedded into the outer surface of the outer pipe (4), wherein the embedding amount is 1.5 mm.
Example 3
As shown in fig. 9, the invention provides a thermoplastic reinforced plastic composite pipe end boss structure, which comprises an outer sleeve (2), an outer pipe (4), a reinforcing layer (5) and an inner pipe (6), wherein the outer layer (4) wraps the outer surface of the reinforcing layer (5), the tail end of the outer layer is flush with the tail end of the reinforcing layer, the reinforcing layer (5) wraps the outer surface of the inner pipe (6), the end part of the inner pipe (6) exceeds the outer pipe (4) and the reinforcing layer (5) by a certain length, the outer sleeve (2) is made of a thermoplastic material the same as that of the outer pipe, and the wall thickness of the outer sleeve is 5 mm-8 mm, so as to ensure that the strength meets the requirements.
FIG. 10 shows a method for preparing a boss structure at the end of a thermoplastic reinforced plastic composite pipe, which is characterized in that: the method comprises the following steps:
And 2, sleeving the outer sleeve (2) on the outer pipe of the thermoplastic reinforced plastic composite pipe (1).
And 3, uniformly heating the inner part and the outer part of the pipe ends of the outer pipe (4) and the inner pipe (6) at 170 ℃ by using a heating ring and a heating rod (9), wherein the heating time is 10 minutes.
And 4, fixing the thermoplastic reinforced plastic composite pipe (1) and the outer sleeve (2) through a clamping device, pushing the mold along the direction of the thermoplastic reinforced plastic composite pipe (1) by using a hydraulic cylinder until the inner pipe (6) which is exposed outside and softened fills the whole gap, and then drawing out the mold after cooling.
The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments may be combined with each other into a new embodiment. The above embodiments are only for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered within the technical solutions of the present invention.
Claims (5)
1. The utility model provides a compound pipe end boss structure of thermoplastic reinforced plastics which characterized in that: comprises a thermoplastic reinforced plastic composite pipe (1), an outer sleeve (2) and an inner lining (3), the thermoplastic reinforced plastic composite pipe (1) comprises an outer pipe (4), a reinforcing layer (5) and an inner pipe (6), wherein the outer pipe (4) is wrapped on the outer surface of the reinforcing layer (5), the tail ends of the reinforcing layers are flush, the reinforcing layer (5) is wrapped on the outer surface of the inner pipe (6), the end part of the inner pipe (6) exceeds the outer pipe (4) and the reinforcing layer (5) for a certain length, the inner surface of the outer sleeve (2) is provided with a sawtooth structure which is embedded into the outer surface of the outer pipe (4) to increase friction, the rightmost end of the inner surface of the outer sleeve (2) is provided with a plurality of sealing grooves which are used for being matched with the end part of the inner pipe (6) to prevent liquid from entering the enhancement layer (5) through gaps, the outer surface of the lining (3) is in interference fit with the inner surface of the inner pipe (6).
2. The thermoplastic reinforced plastic composite pipe end boss structure according to claim 1, wherein: the wall thickness of the outer sleeve (2) is 5 mm-8 mm, and the wall thickness of the inner liner (3) is 0mm or 4 mm-8 mm.
3. The thermoplastic reinforced plastic composite pipe end boss structure according to claim 1, wherein: the outer sleeve (2) is made of a metal material or a thermoplastic material which is the same as that of the outer pipe.
4. A method for preparing a boss structure at the end of a thermoplastic reinforced plastic composite pipe is characterized by comprising the following steps: the method comprises the following steps:
step 1, removing a certain length of an outer pipe (4) and a reinforcing layer (5) at the tail end of a thermoplastic reinforced plastic composite pipe (1) through a peeling machine, and exposing the outer surface of an inner pipe (6).
And 2, placing the outer sleeve (2) in an outer mold (7) of the mold or sleeving the outer pipe of the thermoplastic reinforced plastic composite pipe (1), and sleeving the inner liner (3) on an inner mold (8) for preparing the mold.
And 3, heating the inner part and the outer part of the pipe ends of the outer pipe (4) and the inner pipe (6) simultaneously.
And 4, fixing the thermoplastic reinforced plastic composite pipe (1) through a clamping device, pushing the die in the direction of the thermoplastic reinforced plastic composite pipe (1) by using a hydraulic cylinder until the exposed and softened inner pipe (6) fills the whole sealing groove or gap, and pulling out the die.
And 5, buckling and pressing the outer sleeve (2) by using a pipe reducing machine to ensure that the sawtooth structure of the outer sleeve (2) is embedded into the outer surface of the outer pipe (4), wherein the embedding amount is 1.5 mm.
5. The method for preparing the end boss structure of the thermoplastic reinforced plastic composite pipe according to claim 4, wherein the method comprises the following steps: the heating mode in the step 2 is oven heating or heating by a heating ring and a heating rod (9), the temperature is 165-175 ℃, and the heating time is 5-15 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011350053.8A CN112610781A (en) | 2020-11-26 | 2020-11-26 | Thermoplastic reinforced plastic composite pipe end boss structure and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011350053.8A CN112610781A (en) | 2020-11-26 | 2020-11-26 | Thermoplastic reinforced plastic composite pipe end boss structure and preparation method thereof |
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| Publication Number | Publication Date |
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| CN112610781A true CN112610781A (en) | 2021-04-06 |
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| CN202011350053.8A Pending CN112610781A (en) | 2020-11-26 | 2020-11-26 | Thermoplastic reinforced plastic composite pipe end boss structure and preparation method thereof |
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| 赵鸿佐、胡鹤, 中国建筑工业出版社 * |
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Application publication date: 20210406 |