CN211289149U - PE composite electric melting pipe fitting for high-pressure oil and gas pipeline - Google Patents
PE composite electric melting pipe fitting for high-pressure oil and gas pipeline Download PDFInfo
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- CN211289149U CN211289149U CN201921838249.4U CN201921838249U CN211289149U CN 211289149 U CN211289149 U CN 211289149U CN 201921838249 U CN201921838249 U CN 201921838249U CN 211289149 U CN211289149 U CN 211289149U
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Abstract
The utility model discloses a compound electric smelting pipe fitting of PE, a simple structure is provided, construction convenience, compressive strength is high, safe and reliable's compound electric smelting pipe fitting of PE for high pressure oil gas pipeline, it adopts metal accessories to carry out mechanical type connection usually to have solved the pipeline that exists among the prior art, long-term use back pipeline leakproofness often difficult guarantee, very easily lead to the pipeline to leak, cause the technical problem of incident etc. even when serious, it includes that the suit is responsible for at the outer joint of connecting pipe fitting port each other, with inlay the dress on the joint of connecting pipe fitting correspondence is responsible for the inner ring face and be fixed inside lining pipe, inlay the dress again and be equipped with electric heating wire near the inside lining pipe of connecting the outer anchor ring of pipe fitting, electric heating wire extends to and connects outside the main pipe and the electricity on external power supply, electric heating wire connects the electricity and makes inside lining pipe and connecting pipe fitting butt.
Description
Technical Field
The utility model relates to a compound electric smelting pipe fitting of PE especially relates to a simple structure, construction convenience, and compressive strength is high, the compound electric smelting pipe fitting of PE for high pressure oil gas pipeline of good reliability.
Background
In recent years, high-pressure pipelines of about 3-10MPa are rapidly developed in the fields of oil and gas exploitation and transportation, so that various plastic composite pipelines grow and mature day by day. However, the pipelines need to be connected by connecting pipe fittings such as straight-through pipes, elbows or tee joints, the connecting pipe fittings for the high-pressure composite pipelines mostly adopt clamping and pressing type metal fittings at present, the metal fittings and the plastic composite pipelines are usually connected in a mechanical mode, but the sealing performance of the connecting pipe fittings is often difficult to guarantee in the long-term use process, for example, when the metal fittings are loosened or corroded, the pipeline leakage is very easy to cause, and even safety accidents are caused in serious cases.
Disclosure of Invention
The utility model mainly provides a simple structure, construction convenience, compressive strength is high, safe and reliable's compound electric smelting pipe fitting of PE for high pressure oil gas pipeline has solved the pipeline that exists among the prior art and has adopted metal accessories to carry out mechanical type usually and connect, and pipeline sealing nature often is difficult to guarantee after long-term the use, very easily leads to the pipeline to leak, causes the technical problem of incident etc. even when serious.
The above technical problem of the present invention can be solved by the following technical solutions: a PE composite electric melting pipe fitting for a high-pressure oil and gas pipeline comprises a joint main pipe which is mutually matched and sleeved outside a port of a connecting pipe fitting, an inner lining pipe is fixedly embedded on the inner ring surface of the joint main pipe corresponding to the connecting pipe fitting, an electric heating wire is embedded in the inner lining pipe close to the outer ring surface of the connecting pipe fitting, the electric heating wire extends out of the joint main pipe and is electrically connected to an external power supply, and the inner lining pipe and the connecting pipe fitting are welded into a whole after the electric heating wire is connected with electricity. The fixed lining pipe is embedded on the inner ring surface of the joint main pipe for butting the connecting pipe fitting, the electric heating wire is embedded on the lining pipe close to the outer ring surface of the connecting pipe fitting, when the connecting pipe fitting is installed in place and connection construction is implemented, the electric heating wire can be connected with an external power supply, the heating of the electric heating wire is realized, the inner surface of the lining pipe and the raw material of the outer surface of the connecting pipe fitting are melted, fusion pressure is formed, the lining pipe and the connecting pipe fitting are fused into a whole, the effect of the connecting pipeline is realized, the structure is simple, the construction process of pipeline connection is convenient and fast, the lining pipe improves the strength of the joint main pipe, the lining pipe and the connecting pipe fitting are fused into a whole, the pipeline leakage phenomenon cannot occur, the pipeline sealing performance is good.
Preferably, a reinforcing pipe is further interposed between the lining pipe and the joint main pipe, and inner and outer circumferential surfaces of the reinforcing pipe are fused and fixed to the lining pipe and the joint main pipe by a hot melt adhesive layer, respectively. Through pressing from both sides again between lining pipe and joint main pipe and establishing the reinforcing pipe, through setting up the reinforcing pipe, make it become one of the main carriers that bears highly compressed, further improve the tensile strength who connects the pipe fitting, the reinforcing pipe adopts thermosol and PE substrate to carry out fusion after the presoaking and make as an organic whole again to the reinforcing pipe can effectively fuse with the inside and outside two-layer PE main part of product when producing high-pressure pipe fitting, thereby has guaranteed the bulk strength of pipe fitting.
More preferably, the reinforcing pipe is a fiber tape such as a glass fiber tape or an aramid fiber tape. The glass fiber belt or the aramid fiber and other fiber belts are continuous long glass inorganic fibers or aramid fiber and other organic fibers and have ultrahigh tensile strength.
Preferably, a metal terminal is arranged on the outer side end of the lining pipe corresponding to the joint main pipe, and the electric heating wire is electrically connected to an external power supply through the metal terminal. The port section of the joint main pipe is used for being matched and led in with each other of the connecting pipe fittings, the metal wiring terminal is arranged on the joint main pipe corresponding to the leading-in section of the connecting pipe fitting, and the electric heating wire is connected with an external power supply through the metal wiring terminal.
Preferably, the joint main pipe corresponding to the lining pipe is inserted with an observation column in a sliding mode along the radial direction, the inner side end of the observation column is connected to the outer ring surface of the lining pipe in a propping mode, the outer side end of the observation column extends out of the joint main pipe, and the outer side end of the observation column is covered with an observation column cover cap. When in connection welding, the raw materials of the lining pipe and the connecting pipe fitting are melted, and the observation column slides outwards to push out the joint main pipe under the action of melt pressure, so that whether the pipe fitting is effectively welded or not can be judged by observing the outward movement of the column; the observation post sliding hole is externally sleeved with the observation post cap through the observation post cap screw thread, the observation post can be protected in one direction, and on the other hand, the phenomenon that the observation post is too high after the observation post protrudes out of the joint main pipe can be avoided, so that spray materials are formed, and the welding quality and the appearance are influenced.
More preferably, the observation post is close to the outer side end of the lining pipe, the lining pipe corresponding to the observation post extends inwards to form a groove, the bottom of the groove is close to the electric heating wire, and the inner side end of the observation post abuts against the bottom surface of the groove. The lining pipe corresponding to the observation column forms an inward extending groove, so that the inner side end of the observation column is closer to the electric heating wire, the reaction time of the observation column can be shortened, and the effective welding condition of the pipe fitting can be judged quickly.
Therefore, the utility model discloses a compound electric smelting pipe fitting of PE for high pressure oil gas pipeline has following advantage: the reinforced pipe is formed by taking a Polyethylene (PE) material as a main material and additionally arranging a high-strength composite material in the middle, has the advantages of high compressive strength, convenience in construction and the like, overcomes the defects of metal clamping and pressing type pipe fittings and traditional pure plastic pipe fittings, can be widely applied to the field of high-pressure plastic composite oil and gas pipelines, and fills the gap that the pipelines lack reliable connecting fittings.
Description of the drawings:
fig. 1 is the utility model discloses a cross-sectional view of compound electric smelting pipe fitting of PE for high pressure oil gas pipeline.
The specific implementation mode is as follows:
the technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
Example (b):
as shown in figure 1, the utility model discloses a PE composite electric melting pipe fitting for high pressure oil gas pipeline, including the joint main pipe 2 of mutually supporting suit outside the port of connecting pipe fitting 1, inlay on the joint main pipe 2 inner ring face corresponding with connecting pipe fitting 1 and fix inside lining pipe 3, inside lining pipe 3 and joint main pipe 2 adopt injection moulding to be as an organic whole, inside lining pipe 3 and joint main pipe 2 are coaxial to be pressed from both sides and are equipped with reinforcing pipe 4, reinforcing pipe 4 is formed by fiber band such as glass fiber band or aramid fiber, the inside and outside ring face of reinforcing pipe 4 fuses respectively through hot melt adhesive layer 6 and fixes on corresponding inside lining pipe 3 and joint main pipe 2, make reinforcing pipe 4 and inside lining pipe 3 and joint main pipe 2 become an organic whole, inlay in inside lining pipe 3 near connecting pipe fitting 1 outer ring face and be equipped with electric heating wire 5, electric heating wire 5 is spiral shape evenly distributed, radially peg graft a metal terminal 7 on the corresponding joint main pipe 2 at the outside end of inside lining pipe 3, the electric heating wire 5 is electrically connected with an external power supply through a metal binding post 7, and the lining pipe 3 and the connecting pipe fitting 1 are welded into a whole after the electric heating wire 5 is connected with electricity. An observation column 8 is inserted on the joint main pipe 2 corresponding to the inner lining pipe 3 in a sliding mode along the radial direction, the observation column 8 is close to the outer side end of the inner lining pipe 3, the observation column 8 is made of PE materials, the inner lining pipe 3 corresponding to the observation column 8 extends inwards to form an annular groove 10, the bottom of the groove 10 is close to the electric heating wire 5, the inner side end of the observation column 8 is abutted to the bottom surface of the groove 10, the outer side end of the observation column 8 extends out of the joint main pipe 2, an observation column cover cap 9 is mounted at the outer side end of the observation column 8 in a covering mode, and the observation column cover cap 9 is screwed on the joint main pipe.
A manufacturing method of PE composite electric melting pipe fittings for high-pressure oil and gas pipelines comprises the following sequential steps:
1) injection molding the lining pipe 3 by using an injection molding machine; in the injection molding process, a short-period and less-cooling mode is adopted to ensure that the surface temperature of the lining pipe 3 is maintained at a high temperature state of 80-150 ℃ when the lining pipe is demoulded;
2) taking the lining pipe 3 and the mold core out of the injection molding machine, and then installing the mold core and the lining pipe 3 on a winding machine; after the lining pipe 3 which is rapidly molded in a short period and is provided with a mold core, the lining pipe is immediately assembled on a winding machine after being demoulded;
3) uniformly winding fibers such as glass fibers or aramid fibers on the outer ring surface of the lining pipe 3, heating the fibers such as the glass fibers or the aramid fibers and coating hot melt adhesive on the fibers so as to enable the fibers such as the glass fibers or the aramid fibers and the lining pipe 3 to be fused into a whole; uniformly winding the pre-impregnated reinforced fiber belt (glass fiber or aramid fiber and other fibers) on the outer surface of the lining pipe 3 by a winding machine, heating the surface of the reinforced fiber belt of the lining pipe 3 while winding, wherein the heating temperature is 200 +/-10 ℃, the heating time is 2-3 minutes, and coating hot melt adhesive to enable the hot melt adhesive to be integrated into a whole;
4) taking out the mold core with the lining pipe 3 from the winding machine, remounting the mold core on an injection molding machine, injection molding the joint main pipe 2 outside the lining pipe 3, synchronously forming an observation column mounting hole and a metal binding post mounting hole on the joint main pipe 2 to form a blank pipe fitting, and taking out the blank pipe fitting from the injection molding machine after cooling; after finishing winding the reinforcing fiber belt, rapidly taking the semi-finished product with the mold core out of the winding machine under the condition of keeping the high temperature of 120-180 ℃ inside and outside the semi-finished product, putting the semi-finished product into another set of mold, forming an outer layer PE material into a joint main pipe 2 by adopting an injection molding machine to form an integral blank, taking down the product after fully cooling, and then carrying out standing treatment for more than or equal to 3 days to fully eliminate the internal stress of the product;
5) carrying out back wire distribution processing on the blank pipe fitting by adopting a numerical control wiring machine: finely processing the inner ring surface of the blank pipe fitting by a turning tool, slotting the inner ring surface of the blank pipe fitting by a wiring tool bit, wiring and backfilling the slot, and embedding an electric heating wire 5 into the inner ring surface of the blank pipe fitting;
6) turning the inner ring surface of the blank pipe fitting by using a turning tool; after the wiring operation of the electric heating wire 5 is finished, the turning tool is adopted again to turn the inner surface of the product, so that the size of the inner surface meets the standard precision requirement, and the appearance is smooth and attractive;
7) the electric heating wire 5 is led out from the metal wiring terminal mounting hole, the electric heating wire 5 is connected to the metal wiring terminal 7, the metal wiring terminal 7 is pressed into the metal wiring terminal mounting hole by a manual hydraulic press, the observation column 8 is placed into the observation column mounting hole, the observation column cover cap 9 is connected to the main pipe 2 of the joint outside the observation column 8, and the finished product processing is completed.
The product is made of Polyethylene (PE) materials through secondary injection molding (the lining pipe 3 and the joint main pipe 2), the two are main structures, and the main function is to coat and combine the middle reinforcing layer (the reinforcing pipe 4), the observation column 8, the metal binding post 7 and other accessories together, thereby forming a complete and attractive whole.
The specific embodiments described herein are merely illustrative of the principles of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (6)
1. The utility model provides a compound electric smelting pipe fitting of PE for high pressure oil gas pipeline, includes that the suit is responsible for (2) at the outer joint of connecting pipe fitting (1) port each other, its characterized in that: the inner ring surface of the joint main pipe (2) corresponding to the connecting pipe fitting (1) is fixedly embedded with the inner lining pipe (3), the inner lining pipe (3) close to the outer ring surface of the connecting pipe fitting (1) is also embedded with the electric heating wire (5), the electric heating wire (5) extends to the outside of the joint main pipe (2) and is electrically connected to an external power supply, and the inner lining pipe (3) and the connecting pipe fitting (1) are welded into a whole after the electric heating wire (5) is connected with electricity.
2. The PE composite electric melting pipe fitting for the high-pressure oil and gas pipeline according to claim 1, characterized in that: and a reinforcing pipe (4) is clamped between the lining pipe (3) and the joint main pipe (2), and the inner ring surface and the outer ring surface of the reinforcing pipe (4) are respectively fused and fixed on the lining pipe (3) and the joint main pipe (2) through hot melt adhesive layers (6).
3. The PE composite electric melting pipe fitting for the high-pressure oil and gas pipeline according to claim 2, characterized in that: the reinforced pipe (4) is a glass fiber belt or an aramid fiber belt.
4. The PE composite electric melting pipe fitting for the high-pressure oil and gas pipeline according to claim 1, characterized in that: and a metal binding post (7) is arranged on the outer side end of the lining pipe (3) corresponding to the joint main pipe (2), and the electric heating wire (5) is electrically connected to an external power supply through the metal binding post (7).
5. The PE composite electric melting pipe fitting for the high-pressure oil and gas pipeline according to claim 1, characterized in that: an observation column (8) is inserted on the joint main pipe (2) corresponding to the lining pipe (3) in a sliding mode along the radial direction, the inner side end of the observation column (8) is abutted to the outer ring surface of the lining pipe (3), the outer side end of the observation column extends out of the joint main pipe (2), and an observation column cover cap (9) is mounted at the outer side end of the observation column (8) in a covering mode.
6. The PE composite electric melting pipe fitting for the high-pressure oil and gas pipeline according to claim 5, characterized in that: the observation column (8) is close to the outer side end of the lining pipe (3), the lining pipe (3) corresponding to the observation column (8) extends inwards to form a groove (10), the bottom of the groove (10) is close to the electric heating wire (5), and the inner side end of the observation column (8) is abutted to the bottom surface of the groove (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921838249.4U CN211289149U (en) | 2019-10-29 | 2019-10-29 | PE composite electric melting pipe fitting for high-pressure oil and gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921838249.4U CN211289149U (en) | 2019-10-29 | 2019-10-29 | PE composite electric melting pipe fitting for high-pressure oil and gas pipeline |
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| CN211289149U true CN211289149U (en) | 2020-08-18 |
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| CN201921838249.4U Active CN211289149U (en) | 2019-10-29 | 2019-10-29 | PE composite electric melting pipe fitting for high-pressure oil and gas pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219559A (en) * | 2019-10-29 | 2020-06-02 | 浙江庆发管业科技有限公司 | PE composite electric melting pipe fitting for high-pressure oil and gas pipeline and manufacturing method thereof |
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2019
- 2019-10-29 CN CN201921838249.4U patent/CN211289149U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219559A (en) * | 2019-10-29 | 2020-06-02 | 浙江庆发管业科技有限公司 | PE composite electric melting pipe fitting for high-pressure oil and gas pipeline and manufacturing method thereof |
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