CN115256954A - Composite material pipeline and pipe fitting construction method - Google Patents
Composite material pipeline and pipe fitting construction method Download PDFInfo
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- CN115256954A CN115256954A CN202210739346.8A CN202210739346A CN115256954A CN 115256954 A CN115256954 A CN 115256954A CN 202210739346 A CN202210739346 A CN 202210739346A CN 115256954 A CN115256954 A CN 115256954A
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- pipe
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- butt welding
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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
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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
- 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)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of pipeline construction, in particular to a composite material pipeline and a pipe fitting construction method, which realizes the same material as a pipe, prolongs the service life and improves the safety and reliability; the method comprises the following steps of firstly, edge sealing treatment, removing a reinforcing layer, only remaining inner layer and outer layer materials of a composite pipe, and then carrying out hot melting butt welding on the end face of the composite pipe and thermoplastic resin; secondly, performing hot melting butt welding on the pipe, removing an oxide layer on the end face of the composite pipe, then installing an electric melting pipe to expose the end face of the electric melting pipe in a butt welding mode, then performing butt welding on the composite pipe, and then removing an outer flanging; and thirdly, performing electric fusion welding, namely marking lines on one side of the pipe, then shifting the electric fusion pipe fitting to a specified position, and then completing the electric fusion welding.
Description
Technical Field
The invention relates to the technical field of pipeline construction, in particular to a composite material pipeline and a pipe fitting construction method.
Background
As is well known, a construction method of a composite material pipeline and a pipe fitting is a process method for welding and connecting pipelines, and is widely used in the field of pipeline construction; the market demand of large-caliber (DN 150 and above) composite material pipelines and pipe fittings with the diameter of 2.5 MPa-4 MPa is more vigorous at present, and two forms exist at present: one is metal connection joint, the other is non-metal reinforcing connection joint, and metal connection price is more expensive, and has the corrosion problem, and the probability of being qualified for next round of competitions connects the inefficacy is great, can't guarantee with tubular product the same life-span. The nonmetal reinforced connecting joint can realize the same material of the pipeline, the same service life and higher safety and reliability. Through long-term process groping and test verification, the process of the composite material pipeline and pipe fittings with the pressure of 2.5MPa to 4MPa is determined at present.
Disclosure of Invention
In order to solve the technical problems, the invention provides a composite material pipeline and a pipe fitting construction method which realize the same material as a pipe, prolong the service life and improve the safety and reliability.
The invention relates to a construction method of a composite material pipeline and a pipe fitting, which comprises the following steps of firstly, carrying out edge sealing treatment, removing a reinforcing layer, only reserving inner layer and outer layer materials of the composite pipeline, and then carrying out hot melt butt welding on the end surface of a composite pipe and thermoplastic resin;
secondly, performing hot melting butt welding on the pipe, removing an oxide layer on the end face of the composite pipe, then installing an electric melting pipe to expose the end face of the electric melting pipe in butt welding, then performing butt welding on the composite pipe, and then removing an outward flanging;
and thirdly, performing electric fusion welding, namely marking lines on one side of the pipe, then shifting the electric fusion pipe fitting to a specified position, and then completing the electric fusion welding.
In the edge sealing treatment process, the reinforcing layer is removed by using a turning tool, the turning depth has special requirements, generally 3-5 mm, and only inner layer and outer layer materials of the composite pipeline are reserved on the end surface of the turned composite pipe.
The invention relates to a composite material pipeline and pipe fitting construction method, wherein in an edge sealing treatment process, the turned end face of a composite pipe and a prepared thermoplastic resin (the resin and a base material of the composite pipe are made of the same material) ring are subjected to hot-melt butt welding, a double-welding-plate welding machine is adopted during welding, the welding temperature of two sides is different, the temperature of a contact surface of the ring is 180-220 ℃, the temperature of the contact surface of the composite pipe is 130-180 ℃, and the heating duration is 10min.
According to the construction method of the composite material pipeline and the pipe fitting, disclosed by the invention, in the edge sealing treatment process, after welding is finished, the inner and outer flanges are removed by using a special tool to finish edge sealing treatment.
According to the composite material pipeline and the pipe fitting construction method, in the pipe hot melting butt welding process, the oxide layer which is not less than 1/2 of the length range of the pipe fitting from the end face of the composite pipe is removed.
The invention relates to a construction method of a composite material pipeline and a pipe fitting, which adopts the butt welding process the same as that of a PE gas pipeline to carry out butt welding on a composite pipe in a pipe hot melting butt welding process.
According to the composite material pipeline and the pipe fitting construction method, in the electric fusion welding process, a mark line is made on one side of a pipe, and the distance between the position of the mark line and a hot-melt butt welding port is 1/2 of the length of the pipe fitting.
According to the composite material pipeline and the pipe fitting construction method, in the electric melting welding process, the electric melting pipe fitting is pushed to the designated position, namely the edge of the pipe fitting is flush with the mark line.
Compared with the prior art, the invention has the beneficial effects that: through banding processing, tubular product hot melt butt welding, three process of electrofusion welding, realize nonmetal reinforcing attach fitting, realize that the pipeline is with the material, with the life-span, fail safe nature is higher.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention;
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
As shown in fig. 1 to fig. 1, in the method for constructing a composite pipe and a pipe fitting according to the present invention, a first step is to perform edge sealing treatment, remove a reinforcing layer, leave only inner and outer layer materials of the composite pipe, and then perform hot melt welding on the end surface of the composite pipe and a thermoplastic resin;
secondly, performing hot melting butt welding on the pipe, removing an oxide layer on the end face of the composite pipe, then installing an electric melting pipe to expose the end face of the electric melting pipe in butt welding, then performing butt welding on the composite pipe, and then removing an outward flanging;
and thirdly, performing electric fusion welding, namely marking lines on one side of the pipe, then shifting the electric fusion pipe fitting to a specified position, and then completing the electric fusion welding.
In the edge sealing treatment process, the reinforcing layer is removed by using a turning tool, the turning depth has special requirements, generally 3-5 mm, and only inner layer and outer layer materials of the composite pipeline are reserved on the end surface of a turned composite pipe.
The invention relates to a composite material pipeline and pipe fitting construction method, wherein in an edge sealing treatment process, the turned end face of a composite pipe and a prepared thermoplastic resin (the resin and a base material of the composite pipe are made of the same material) ring are subjected to hot-melt butt welding, a double-welding-plate welding machine is adopted during welding, the welding temperature of two sides is different, the temperature of a contact surface of the ring is 180-220 ℃, the temperature of the contact surface of the composite pipe is 130-180 ℃, and the heating duration is 10min.
According to the construction method of the composite material pipeline and the pipe fitting, disclosed by the invention, in the edge sealing treatment process, after welding is finished, the inner and outer flanges are removed by using a special tool to finish edge sealing treatment.
The invention relates to a construction method of a composite material pipeline and a pipe fitting, which is used for removing an oxide layer within a length range which is not less than 1/2 of the length of the pipe fitting from the end surface of a composite pipe in a pipe hot melting butt welding process.
The invention relates to a construction method of a composite material pipeline and a pipe fitting, which adopts the same butt welding process as a PE gas pipeline to carry out butt welding of a composite pipe in a pipe hot melting butt welding process.
According to the composite material pipeline and the pipe fitting construction method, in the electric fusion welding process, a mark line is made on one side of a pipe, and the distance between the position of the mark line and a hot-melt butt welding port is 1/2 of the length of the pipe fitting.
According to the composite material pipeline and the pipe fitting construction method, in the electric melting welding process, the electric melting pipe fitting is pushed to the designated position, namely the edge of the pipe fitting is flush with the mark line.
According to the composite material pipeline and the construction method of the pipe fitting, in the electric fusion welding process, the special fixture is installed to fix the pipe, electric fusion welding is completed according to the specified electric fusion welding parameters, and therefore the construction operation of connecting the electric fusion pipe fitting of the composite pipe is completed.
According to the construction method of the composite material pipeline and the pipe fitting, when the composite material pipeline and the pipe fitting work, the nonmetal reinforced connecting joint is achieved through three procedures of edge sealing treatment, pipe hot-melt butt welding and electric-melt welding, the same material and service life of the pipeline are achieved, and the safety and the reliability are high.
According to the construction method of the composite material pipeline and the pipe fitting, the installation mode, the connection mode or the arrangement mode are all common mechanical modes, and the construction method can be implemented as long as the beneficial effects of the construction method can be achieved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A construction method for composite material pipeline and pipe fittings is characterized by comprising
The method comprises the following steps of firstly, performing edge sealing treatment, removing a reinforcing layer, only reserving inner layer and outer layer materials of a composite pipeline, and then performing hot melting butt welding on the end face of the composite pipeline and thermoplastic resin;
secondly, performing hot melting butt welding on the pipe, removing an oxide layer on the end face of the composite pipe, then installing an electric melting pipe to expose the end face of the electric melting pipe in a butt welding mode, then performing butt welding on the composite pipe, and then removing an outer flanging;
and thirdly, performing electric fusion welding, namely making a marking line on one side of the pipe, then shifting the electric fusion pipe fitting to a specified position, and then finishing the electric fusion welding.
2. The method as claimed in claim 1, wherein the edge sealing process is performed by removing the reinforcement layer by turning with a turning tool, wherein the turning depth is 3-5 mm, and only the inner and outer layer materials of the composite pipe are remained on the end surface of the composite pipe.
3. The method for constructing the composite material pipeline and pipe fittings according to claim 1, wherein in the edge sealing treatment process, the turned end face of the composite pipe and a prepared thermoplastic resin (the resin should be the same as the base material of the composite pipe) ring are subjected to hot-melt butt welding, a double-welding-plate welding machine is adopted during welding, the welding temperature of two sides is different, the temperature of the contact surface of the ring is 180-220 ℃, the temperature of the contact surface of the composite pipe is 130-180 ℃, and the heating duration is 10min.
4. The method of claim 1, wherein the sealing process is performed by removing the flanges with a special tool after welding.
5. The method of claim 1, wherein the oxide layer is removed from the end face of the composite pipe by a distance of not less than 1/2 of the length of the pipe.
6. The method as claimed in claim 1, wherein the butt welding of the composite pipe is performed by the same butt welding process as that of the PE gas pipe in the pipe hot-melt butt welding process.
7. The method as claimed in claim 1, wherein the marking line is formed on one side of the pipe in the electrofusion welding process, and the marking line is located at a distance of 1/2 of the length of the pipe from the thermofusion butt weld.
8. A method of constructing a composite pipe and tube as claimed in claim 1, wherein in the electrofusion welding process, the electrofusion tube is set to a predetermined position where the edge of the tube is flush with the mark line.
9. The method as claimed in claim 1, wherein the electrofusion welding process comprises installing a special fixture to fix the pipe, and performing electrofusion welding according to the specified parameters, thereby completing the connecting operation of the electrofusion pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210739346.8A CN115256954A (en) | 2022-06-28 | 2022-06-28 | Composite material pipeline and pipe fitting construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210739346.8A CN115256954A (en) | 2022-06-28 | 2022-06-28 | Composite material pipeline and pipe fitting construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115256954A true CN115256954A (en) | 2022-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210739346.8A Pending CN115256954A (en) | 2022-06-28 | 2022-06-28 | Composite material pipeline and pipe fitting construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115256954A (en) |
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2022
- 2022-06-28 CN CN202210739346.8A patent/CN115256954A/en active Pending
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