CN110630829B

CN110630829B - Structure and construction method of prefabricated oil and gas multiphase conveying flat cavity intelligent thermal insulation pipeline

Info

Publication number: CN110630829B
Application number: CN201910879117.4A
Authority: CN
Inventors: 马令勇; 计静; 张云峰; 齐晗兵; 王莉莉; 梁媛
Original assignee: Northeast Petroleum University
Current assignee: Northeast Petroleum University
Priority date: 2019-09-18
Filing date: 2019-09-18
Publication date: 2021-06-08
Anticipated expiration: 2039-09-18
Also published as: CN110630829A

Abstract

The utility model discloses an assembled oil and gas multiphase conveying flat cavity intelligent thermal insulation pipeline structure and construction method, and relates to the technical field of pipelines. It is formed by connecting two pipelines through GFRP anti-buckling energy dissipation dampers. The node, the single pipe includes the outer GFRP round pipe, the inner GFRP round pipe, the self-compacting fine stone concrete layer and the annular heat transfer plate; the outer wall of the outer GFRP round pipe is provided with reserved bolt holes and heat conduction for the outer GFRP round pipe The pipe installation hole and the heat pipe installation hole are connected with the temperature control device through the steel anchor frame; the two pipeline monomers are connected by an integral node. The outer wall of the integral node is provided with a concrete pouring hole and an exhaust hole. The prefabricated flat cavity intelligent thermal insulation pipeline structure and construction method for multiphase oil and gas transportation solves the problems of traditional pipelines with small diameter, poor stability, poor impermeability, low transportation efficiency, single transportation mode and poor thermal insulation performance of transportation medium in high and severe cold areas.

Description

Assembly type oil-gas multiphase conveying flat cavity intelligent heat insulation pipeline structure and construction method

The technical field is as follows:

the invention relates to the technical field of pipelines, in particular to an intelligent heat-insulating pipeline structure with an assembled oil-gas multiphase conveying flat cavity and a construction method.

Background art:

conventional long-distance pipelines are mostly round steel pipe pipelines and reinforced concrete round pipelines, the diameters of the pipelines are mostly within the range of 0.5-1.5 m, one ends of the pipelines adopt the form of enlarged heads, and the pipelines are connected through end sockets. Liquid is conveyed in the steel pipe all the year round, the steel pipe is easy to rust, the effective thickness of the pipe wall can be reduced due to long-term erosion, the rigidity of the pipe wall is reduced, and local buckling is easy to occur under the action of soil and external pressure. Meanwhile, as the inner wall of the pipeline is corroded by liquid, more and more impurities are generated, the quality inspection is difficult to reach the standard, and the pipeline cannot be replaced when the designed service life is reached. The reinforced concrete pipeline is easy to rust under the liquid erosion for a long time, the impermeability of the pipe wall is difficult to ensure, and the leakage phenomenon can be formed for a long time. After the pipeline area experiences slight vibration, the conventional connection of the reinforced concrete pipeline port is easy to loosen, and the tightness of the pipeline is difficult to ensure. Later to avoid pipe leakage, steel pipes were placed in the middle of concrete pipes to form built-in steel pipe concrete composite pipes, which, while increasing the rigidity and strength of the pipes, presented a greater challenge to reliable connections between the pipes. In addition, the heat insulation performance of the steel pipelines is poor, and the steel pipelines cannot insulate the transported gas or liquid in severe cold areas. Later, people began to wrap the thermal insulation material outside the pipeline, but as time goes on, the outer layer thermal insulation material gradually suffers from the erosion and damage of the environment, so that the maintenance and the replacement are needed irregularly, and the maintenance cost of the pipeline is increased unintentionally. And conventional pipeline structure is mostly the single tube, and the transportation mode is more single to conveying efficiency also can not satisfy the industrial demand gradually.

The invention content is as follows:

the invention aims to overcome the defects of the prior art, provides an assembled oil-gas multiphase conveying flat-cavity intelligent heat-insulating pipeline structure and a construction method, is used for solving the problems of small diameter, poor stability and impermeability, low conveying efficiency, single conveying mode and poor heat-insulating property of conveying media in severe cold regions of the traditional pipeline, and also provides the construction method of the assembled oil-gas multiphase conveying flat-cavity intelligent heat-insulating pipeline structure system.

The technical scheme adopted by the invention is as follows: an assembled oil-gas multiphase conveying flat cavity intelligent heat preservation pipeline structure and a construction method are formed by connecting two pipelines through GFRP anti-buckling energy dissipation dampers, the two pipelines are arranged in parallel side by side, each pipeline comprises a pipeline monomer and an integral node, the pipeline monomer comprises an outer GFRP circular pipe, an inner GFRP circular pipe, a self-compaction pea gravel concrete layer and an annular heat transfer plate, a plurality of shear connection keys are uniformly distributed on the inner wall of the outer GFRP circular pipe in the circumferential direction, the inner GFRP circular pipe surrounds the outer GFRP circular pipe, an interlayer is arranged between the outer GFRP circular pipe and the inner GFRP circular pipe, an annular heat transfer plate is arranged in the interlayer, the self-compaction pea gravel concrete layer is filled between the annular heat transfer plate and the pipe wall, a plurality of GFRP high-strength bolts are uniformly distributed on the outer wall of the inner GFRP circular pipe in the circumferential direction, the GFRP high-strength bolts fix the annular heat transfer plate and the inner, the bolt holes penetrate through the outer layer GFRP circular tube, the inner layer GFRP circular tube, the self-compacting fine stone concrete layer and the annular heat transfer plate; the outer wall of the outer layer GFRP circular pipe is provided with an outer layer GFRP circular pipe reserved bolt hole and a heat conduction pipe mounting hole, a steel anchor frame is mounted outside the heat conduction pipe mounting hole, a temperature control device is arranged on the steel anchor frame, and the temperature control device is connected with the annular heat transfer plate; through integral nodal connection between two pipeline monomers, integral node is through the bolt hole connection of high strength bolt and two pipeline monomer tip, is equipped with concrete placement hole and exhaust hole on the integral node outer wall, concrete placement hole and exhaust hole interval distribution.

The integral type node comprises an outer layer GFRP circular tube, an inner layer GFRP circular tube, a self-compaction pea gravel concrete layer and an annular heat transfer plate, wherein a plurality of shear connection keys are uniformly distributed on the inner wall of the outer layer GFRP circular tube in the circumferential direction, the inner layer GFRP circular tube surrounds the outer layer GFRP circular tube, an interlayer is arranged between the outer layer GFRP circular tube and the inner layer GFRP circular tube, the annular heat transfer plate is arranged in the interlayer, the self-compaction pea gravel concrete layer is filled between the annular heat transfer plate and the tube wall, a plurality of GFRP high-strength bolts are uniformly distributed on the outer wall of the inner layer GFRP circular tube in the circumferential direction, and the GFRP high-strength bolts fix the annular.

The outer diameter of the inner GFRP circular pipe of the integral node is equal to the inner diameter of the inner GFRP circular pipe of the pipeline monomer; the inner diameter of the outer layer GFRP circular pipe of the integral node is equal to the outer diameter of the outer layer GFRP circular pipe of the single pipeline.

Concrete pouring holes and exhaust holes are formed in the outer wall of the outer layer GFRP circular tube of the integral node and are distributed at intervals; the annular heat transfer plate of the integral joint is also provided with concrete pouring holes and exhaust holes, and the concrete pouring holes and the exhaust holes are in one-to-one correspondence in the upper and lower positions.

The temperature control device comprises a solar photovoltaic panel, an electric heating converter, a conducting wire and a heat conducting pipe, wherein the solar photovoltaic panel is connected with the electric heating converter through the conducting wire, the electric heating converter is connected with an annular heat transfer plate through the heat conducting pipe, an upper round steel pipe maintenance structure and a lower round steel pipe maintenance structure are sleeved outside the conducting wire and the heat conducting pipe respectively, and the lower round steel pipe maintenance structure is fixed on the outer wall of the pipeline monomer through a steel anchor frame; the upper part of the lower circular steel tube maintenance structure, the electric heating converter, the upper circular steel tube maintenance structure and the solar photovoltaic panel are located on the ground.

The single pipeline is a single pipe, and the section of the single pipeline is circular; the outer layer GFRP circular tube and the inner layer GFRP circular tube are seamless winding type GFRP circular tubes; the pipeline is a double pipe and the section of the pipeline is circular.

The pipeline monomer is one of a linear pipeline monomer, a curved pipeline monomer or a crossing pipeline monomer.

The lateral surface of the pipeline monomer is horizontally and symmetrically provided with GFRP anti-buckling energy dissipation dampers, one ends of the GFRP anti-buckling energy dissipation dampers are connected with the outer wall of the pipeline monomer through claw-type connecting pieces, and the other ends of the GFRP anti-buckling energy dissipation dampers are hinged with the foundation; one end of the claw type connecting piece is provided with a circular ring and is hinged with the GFRP buckling-restrained energy dissipation damper, the other end of the claw type connecting piece is provided with a reserved bolt hole, and the reserved bolt hole is connected with a reserved bolt hole of an outer-layer GFRP circular tube through a high-strength bolt.

The two ends of the GFRP anti-buckling energy dissipation damper between the two pipelines are respectively hinged with one end of a claw type connecting piece, and the other end of the claw type connecting piece is respectively connected with the reserved bolt holes of the outer layer GFRP circular tube on the outer wall of the corresponding pipeline monomer through high-strength bolts.

The method comprises the following steps:

1) firstly prefabricating a combined pipeline monomer in a factory, manufacturing an inner layer GFRP circular pipe, an outer layer GFRP circular pipe, a shearing resistant connecting key, a GFRP high-strength bolt, a double positioning nut matched with the GFRP high-strength bolt, an annular heat transfer plate, a claw type connecting piece, a steel anchor frame and a temperature control device according to the size requirement, arranging the GFRP high-strength bolt on the inner layer GFRP circular pipe, reserving bolt holes on the annular heat transfer plate to enable the bolt holes to correspond to the GFRP high-strength bolt on the inner layer GFRP circular pipe, then adopting the double positioning nut to connect and fix the annular heat transfer plate and the inner layer GFRP circular pipe, arranging the shearing resistant connecting key on the inner side of the outer layer GFRP circular pipe, reserving bolt holes at two end parts of the inner layer GFRP circular pipe and the outer layer GFRP circular pipe, reserving bolt holes and heat conduction pipe mounting holes on the outer layer GFRP circular pipe at designed positions, connecting and fixing the claw type connecting piece and the steel anchor frame with the outer layer GFRP circular pipe through the high-strength, connecting a heat conduction pipe with an annular heat transfer plate between an inner layer of GFRP circular pipe and an outer layer of GFRP circular pipe through a heat conduction pipe mounting hole, welding a lower circular steel pipe maintenance structure on a steel anchor frame, leading out the heat conduction pipe through the lower circular steel pipe maintenance structure, screwing high-strength bolts at two ends, then simultaneously pouring a self-compacting fine stone concrete layer among the annular heat transfer plate, the inner layer of GFRP circular pipe and the outer layer of GFRP circular pipe from top to bottom, loosening and repeatedly twisting the high-strength bolts after the concrete is initially set to form bolt holes, and forming a combined pipeline monomer after maintenance;

2) prefabricating an inner layer GFRP circular tube, an outer layer GFRP circular tube and an annular heat transfer plate for forming an integral node in a factory, arranging a GFRP high-strength bolt on the inner layer GFRP circular tube of the integral node, reserving bolt holes on the annular heat transfer plate of the integral node, enabling the bolt holes to correspond to the GFRP high-strength bolt on the inner layer GFRP circular tube, then connecting and fixing the annular heat transfer plate and the inner layer GFRP circular tube through double positioning nuts, arranging a shear-resistant connecting key on the inner side of the outer layer GFRP circular tube of the integral node, reserving bolt holes at two end parts of the inner layer GFRP circular tube and the outer layer GFRP circular tube, reserving a concrete pouring hole and an exhaust hole at the top of the outer layer GFRP circular tube of the integral node, and reserving a concrete pouring hole and an;

3) transporting the prefabricated single pipe and the inner GFRP circular pipe, the outer GFRP circular pipe and the annular heat transfer plate of the integral node to the site, arranging the single pipe on site soil, then placing the inner GFRP circular pipe and the annular heat transfer plate of the integral node which are connected and fixed into the outer GFRP circular pipe, concentrically inserting the single pipe and the integral node which is not cast with concrete into the single pipe, fixedly connecting the single pipe with the integral node which is not cast with concrete by using a high-strength bolt, then using a concrete pump to pour the stirred self-compacting fine stone concrete into the space between the annular heat transfer plate of the integral node and the inner GFRP circular pipe through a concrete pouring hole on the annular heat transfer plate, stopping pouring when the concrete at the exhaust hole on the annular heat transfer plate overflows, and then pouring the self-compacting fine stone concrete into the space between the annular heat transfer plate of the integral node and the outer GFRP circular pipe through the concrete pouring hole on the outer, stopping pouring when concrete at the exhaust hole on the outer layer GFRP circular pipe overflows, and sequentially connecting the pipeline monomers by adopting integral nodes;

4) the GFRP anti-buckling energy dissipation damper is prefabricated in a factory, one end of the GFRP anti-buckling energy dissipation damper is connected with a circular ring of a claw type connecting piece on site through a high-strength bolt, the other end of the GFRP anti-buckling energy dissipation damper is connected with a foundation, the connection modes of the two ends are hinged, the GFRP anti-buckling energy dissipation damper used for connecting two pipelines is connected with the circular ring of the claw type connecting piece on the inner side of the two pipelines through the high-strength bolt, the connection modes are hinged, and the GFRP anti-buckling energy dissipation damper is symmetrically arranged at intervals along the direction of the pipelines;

5) the assembled oil-gas multiphase conveying flat cavity intelligent heat preservation pipeline structure is constructed by connecting an installed lower round steel pipe maintenance structure and a heat conduction pipe with an electric heating converter on site, connecting the electric heating converter with a solar photovoltaic power generation board through an upper round steel pipe maintenance structure and a conductive wire, and arranging intelligent temperature control devices on a pipeline at intervals according to the above mode.

The invention has the beneficial effects that:

1) the assembly type connection of the pipelines is realized by using local cast-in-place self-compacting concrete, the connection mode of the traditional pipeline is changed, the pipeline can have good long-term tightness and is durable, and the requirement of the design service life is met;

2) the combined section form of GFRP and self-compacting concrete is adopted, the mechanical properties of two materials are fully utilized, the bearing capacity and the stability of the pipeline are greatly improved, and the self-compacting concrete is suitable for a conveying pipeline with a large pipe diameter;

3) two pipelines are adopted to simultaneously convey media, one medium can be conveyed, and two media can be conveyed simultaneously, so that the conveying mode is enriched, and the conveying efficiency is improved;

4) the GFRP buckling-restrained energy-dissipation damper is adopted, so that the fixing connection effect can be achieved, the energy-dissipation and shock-absorption effects can be achieved during an earthquake, and the anti-seismic performance of the pipeline is improved;

5) the adopted GFRP circular tube non-metal material has high tensile strength, light weight, good construction manufacturability, good corrosion resistance, insensitivity to temperature change and good heat insulation, is convenient to be applied in high-stringency cold regions and saline-alkali regions, can convey liquid and gas which cannot be conveyed by steel pipelines, and simultaneously ensures the stability of conveyed media;

6) the pipeline is provided with the temperature control device, and the device can store and convert absorbed solar energy into heat energy in daytime and transmit the heat energy to the whole pipeline through the heat conduction pipe and the annular heat transfer plate, so that intelligent temperature control is realized;

7) the pipeline has strong applicability, can be arranged in a straight line, a curve and a crossing way, solves the problem of limitation of the traditional pipeline, can be buried underground or arranged on the ground, can be flexibly arranged aiming at complex terrains, and can avoid mountains, rivers and the like;

8) the inner surface of the pipeline is smooth, the resistance to the conveying medium is small, the deposited medium is relatively less, and the conveying efficiency of the pipeline can be greatly improved;

9) the single pipeline and the integral node can be prefabricated in a factory and installed on site, so that the construction period is greatly shortened;

10) the pipeline has good waterproof performance and strong freeze-thaw resistance in the underground complex environment, and can obviously improve the fatigue resistance of the pipeline.

Description of the drawings:

FIG. 1 is a schematic view of a linear duct unit according to the present invention;

FIG. 2 is a schematic view of a single structure of the curved pipeline of the present invention;

FIG. 3 is a schematic structural diagram of a cross-over type pipeline monomer of the present invention;

FIG. 4 is a schematic cross-sectional view of a single pipe of the present invention

FIG. 5 is a schematic cross-sectional view of a dual-duct configuration of the present invention;

FIG. 6 is a schematic cross-sectional view of an integral joint connection of the single pipe body of the present invention with no concrete poured;

FIG. 7 is a schematic cross-sectional view of the connection of the pipe elements of the present invention to the cast concrete integral joint;

FIG. 8 is a schematic cross-sectional view of an outer GFRP tube of the integral node of the invention;

FIG. 9 is a schematic cross-sectional view of an outer GFRP tube of the integral node of the invention;

FIG. 10 is a schematic cross-sectional view of an inner GFRP tubular of the integral node of the invention;

FIG. 11 is a schematic cross-sectional view of an inner GFRP tubular of the integral node of the invention;

FIG. 12 is a schematic cross-sectional view of the connection of a single curved pipe and an integral joint according to the present invention;

FIG. 13 is a cross-sectional view of the cross-over type pipe monolith and integral node connection of the present invention;

FIG. 14 is a schematic view of the outer layer GFRP circular tube preformed bolt hole structure of the single pipe body of the invention;

FIG. 15 is a schematic view of the structure of the mounting hole of the outer GFRP circular tube reserved heat conducting pipe of the single pipe of the present invention;

FIG. 16 is a schematic view of the claw coupling of the present invention;

FIG. 17 is a cross-sectional schematic view of the jaw connection of the present invention;

FIG. 18 is a schematic view of a GFRP anti-buckling energy-consuming damper of the present invention;

FIG. 19 is a schematic view of a temperature control device according to the present invention.

The specific implementation mode is as follows:

referring to the figures, an assembled oil-gas multiphase conveying flat cavity intelligent heat preservation pipeline structure and a construction method are formed by connecting two pipelines through GFRP anti-buckling energy dissipation dampers 25, the two pipelines are arranged in parallel side by side, each pipeline comprises a pipeline single body 1 and an integral node 4, the pipeline single body 1 comprises an outer GFRP circular pipe 12, an inner GFRP circular pipe 13, a self-compacting fine stone concrete layer 23 and an annular heat transfer plate 14, a plurality of shear-resistant connecting keys 5 are uniformly distributed on the inner wall of the outer GFRP circular pipe 12 in the circumferential direction, the outer GFRP circular pipe 12 surrounds the inner GFRP circular pipe 13 in the circumferential direction, an interlayer is arranged between the outer GFRP circular pipe 12 and the inner GFRP circular pipe 13, the annular heat transfer plate 14 is arranged in the interlayer, the self-compacting fine stone concrete layer 23 is filled between the annular heat transfer plate 14 and the pipe wall, a plurality of GFRP high-strength bolts 7 are uniformly distributed on the outer wall of the inner GFRP circular pipe 13 in the circumferential direction, the two end parts of the pipeline single body 1 are respectively provided with bolt holes 6, and the bolt holes 6 penetrate through the outer layer GFRP circular tube 12, the inner layer GFRP circular tube 13, the self-compacting fine stone concrete layer 23 and the annular heat transfer plate 14; the outer wall of the outer layer GFRP circular tube 12 is provided with an outer layer GFRP circular tube reserved bolt hole 28 and a heat conduction pipe mounting hole 22, a steel anchor frame 21 is mounted outside the heat conduction pipe mounting hole 22, a temperature control device is arranged on the steel anchor frame 21, and the temperature control device is connected with the annular heat transfer plate 14; connect through integral node 4 between two pipeline monomers 1, integral node 4 is connected through the bolt hole 6 of high strength bolt 8 with two pipeline monomer 1 tip, is equipped with concrete placement hole 10 and exhaust hole 11 on the 4 outer walls of integral node, and concrete placement hole 10 and exhaust hole 11 interval distribution. The integral type node 4 comprises an outer layer GFRP circular tube 12, an inner layer GFRP circular tube 13, a self-compaction fine stone concrete layer 23 and an annular heat transfer plate 14, wherein a plurality of shear connection keys 5 are evenly distributed on the inner wall of the outer layer GFRP circular tube 12 in the circumferential direction, the inner layer GFRP circular tube 13 surrounds the outer layer GFRP circular tube 12, an interlayer is arranged between the outer layer GFRP circular tube 12 and the inner layer GFRP circular tube 13, the annular heat transfer plate 14 is arranged in the interlayer, the self-compaction fine stone concrete layer 23 is filled between the annular heat transfer plate 14 and the tube wall, a plurality of GFRP high-strength bolts 7 are evenly distributed on the outer wall of the inner layer GFRP circular tube 13 in the circumferential direction, and the annular heat transfer plate 14 and the inner layer GFRP. The outer diameter of the inner GFRP circular tube 13 of the integral node 4 is equal to the inner diameter of the inner GFRP circular tube 13 of the pipeline monomer 1; the inner diameter of the outer GFRP circular tube 12 of the integral node 4 is equal to the outer diameter of the outer GFRP circular tube 12 of the single pipeline 1. Concrete pouring holes 10 and exhaust holes 11 are formed in the outer wall of an outer GFRP circular tube 12 of the integral node 4, and the concrete pouring holes 10 and the exhaust holes 11 are distributed at intervals; the annular heat transfer plate 14 of the integral joint 4 is also provided with concrete pouring holes 10 and exhaust holes 11, and the concrete pouring holes 10 correspond to the exhaust holes 11 in the vertical position one by one. The temperature control device comprises a solar photovoltaic electric plate 15, an electric heating converter 16, a conducting wire 17 and a heat conduction pipe 18, wherein the solar photovoltaic electric plate 15 is connected with the electric heating converter 16 through the conducting wire 17, the electric heating converter 16 is connected with an annular heat transfer plate 14 through the heat conduction pipe 18, the conducting wire 17 and the heat conduction pipe 18 are respectively sleeved with an upper round steel pipe maintenance structure 19 and a lower round steel pipe maintenance structure 20, and the lower round steel pipe maintenance structure 20 is fixed on the outer wall of the pipeline monomer 1 through a steel anchor frame 21. The upper part of the lower round steel tube maintenance structure 20, the electrothermal converter 16, the upper round steel tube maintenance structure 19 and the solar photovoltaic panel 15 are positioned on the ground 27. The single pipeline 1 is a single pipe with a circular section; the outer layer GFRP circular tube 12 and the inner layer GFRP circular tube 13 are seamless winding type GFRP circular tubes; the pipeline is a double pipe and the section of the pipeline is circular. The pipeline monomer 1 is one of a linear pipeline monomer, a curved pipeline monomer 2 or a crossing pipeline monomer 3. The lateral surface of the pipeline single body 1 is horizontally and symmetrically provided with GFRP anti-buckling energy-dissipation dampers 25, one end of each GFRP anti-buckling energy-dissipation damper 25 is connected with the outer wall of the pipeline single body 1 through a claw-type connecting piece 24, and the other end of each GFRP anti-buckling energy-dissipation damper 25 is hinged with a foundation 26. One end of the claw type connecting piece 24 is provided with a circular ring and is hinged with the GFRP buckling-restrained energy dissipation damper 25, the other end of the claw type connecting piece 24 is provided with a reserved bolt hole, and the reserved bolt hole is connected with an outer layer GFRP circular pipe reserved bolt hole 28 through a high-strength bolt 8. Two ends of a GFRP anti-buckling energy-consumption damper 25 between the two pipelines are respectively hinged with one end of a claw type connecting piece 24, and the other end of the claw type connecting piece 24 is respectively connected with an outer layer GFRP circular tube reserved bolt hole 28 of the outer wall of the corresponding pipeline single body 1 through a high-strength bolt 8.

The method comprises the following steps:

1) firstly prefabricating a combined pipeline monomer 1 in a factory, manufacturing an inner layer GFRP circular pipe 13, an outer layer GFRP circular pipe 12, a shear connection key 5, a GFRP high-strength bolt 7, a double positioning nut 9 matched with the GFRP high-strength bolt 7, an annular heat transfer plate 14, a claw type connecting piece 24, a steel anchor frame 21 and a temperature control device according to the size requirement, arranging the GFRP high-strength bolt 7 on the inner layer GFRP circular pipe 13, reserving bolt holes on the annular heat transfer plate 14 to enable the bolt holes to correspond to the GFRP high-strength bolt 7 on the inner layer GFRP circular pipe 13, then adopting the double positioning nut 9 to connect and fix the annular heat transfer plate 14 and the inner layer GFRP circular pipe 13, arranging the shear connection key 5 on the inner side of the outer layer GFRP circular pipe 12, reserving bolt holes 6 at two end parts of the inner and outer layer GFRP circular pipes, reserving bolt holes 28 and a heat conduction pipe mounting hole 22 on the outer layer GFRP circular pipe 12, connecting the claw type connecting piece 24 and the steel anchor frame 21 with the outer layer, an inner layer GFRP circular tube 13 with an annular heat transfer plate 14 is concentrically and vertically placed in an outer layer GFRP circular tube 12, a heat conduction tube 18 is connected with the annular heat transfer plate 14 between the inner layer GFRP circular tube and the outer layer GFRP circular tube through a heat conduction tube mounting hole 22, a lower circular tube maintenance structure 20 is welded on a steel anchor frame 21, the heat conduction tube 18 is led out through the lower circular tube maintenance structure 20, high-strength bolts 8 at two ends are screwed, then a self-compaction fine stone concrete layer 23 is simultaneously filled among the annular heat transfer plate 14, the inner layer GFRP circular tube 13 and the outer layer GFRP circular tube 12 from top to bottom, after initial setting of concrete, the high-strength bolts are loosened and repeatedly twisted to form bolt holes, and after maintenance, a combined pipeline monomer 1 is formed;

2) prefabricating an inner layer GFRP circular tube 13, an outer layer GFRP circular tube 12 and an annular heat transfer plate 14 for forming the integral node 4 in a factory, arranging a GFRP high-strength bolt 7 on the inner layer GFRP circular tube 13 of the integral node 4, reserving bolt holes on the annular heat transfer plate 14 of the integral node 4, enabling the bolt holes to correspond to the GFRP high-strength bolt 7 on the inner layer GFRP circular tube 13, then connecting and fixing the annular heat transfer plate 14 and the inner layer GFRP circular tube 13 through a double-positioning nut 9, arranging a shear-resistant connecting key 5 on the inner side of the outer layer GFRP circular tube 12 of the integral node 4, reserving bolt holes 6 at two end parts of the inner layer GFRP circular tube and the outer layer GFRP circular tube, reserving a concrete pouring hole 10 and an exhaust hole 11 at the top part of the outer layer GFRP circular tube 12 of the integral node 4, and reserving a concrete pouring hole 10 and;

3) transporting a prefabricated pipeline single body 1 and an inner layer GFRP circular tube 13, an outer layer GFRP circular tube 12 and an annular heat transfer plate 14 of an integral node 4 to a site, arranging the pipeline single body 1 on site soil, then placing the inner layer GFRP circular tube 13 and the annular heat transfer plate 14 of the integral node 4 which are connected and fixed into the outer layer GFRP circular tube 12, concentrically inserting the three into the pipeline single body 1, fixedly connecting the pipeline single body 1 with the integral node 4 which is not cast with concrete by using a high-strength bolt 8, then utilizing a concrete pump to firstly pour the stirred self-compacting fine stone concrete between the annular heat transfer plate 14 and the inner layer GFRP circular tube 13 of the integral node 4 through a concrete pouring hole 10 on the annular heat transfer plate 14, stopping pouring the concrete when the concrete at an exhaust hole 11 on the annular heat transfer plate 14 overflows, and then pouring the self-compacting fine stone into the annular heat transfer plate 14 and the outer layer GFRP circular tube 12 of the integral node 4 through the concrete pouring hole 10 on the outer layer GFRP circular tube 12 Stopping pouring when concrete at the exhaust holes 11 on the outer layer GFRP circular tube 12 overflows, and sequentially connecting the pipeline monomers 1 by adopting the integral nodes 4;

4) the GFRP anti-buckling energy-dissipation dampers 25 are prefabricated in a factory, one end of each GFRP anti-buckling energy-dissipation damper is connected with the circular ring of the claw type connecting piece 24 through the high-strength bolt 8 on the spot, the other end of each GFRP anti-buckling energy-dissipation damper is connected with the foundation 26, the connection modes of the two ends are hinged, the GFRP anti-buckling energy-dissipation dampers 25 used for connecting the two pipelines are connected with the circular rings of the claw type connecting pieces 24 on the inner sides of the two pipelines through the high-strength bolt 8, the connection modes are hinged, and the GFRP anti-buckling energy-dissipation dampers 25 are symmetrically arranged;

5) the lower round steel tube maintenance structure 20 and the heat conduction tube 18 which are installed are connected with the electric heating converter 16 on site, the electric heating converter 16 is connected with the solar photovoltaic power generation plate 15 through the upper round steel tube maintenance structure 19 and the electric lead 17, and the intelligent temperature control devices are arranged on the pipeline at intervals according to the above mode, so that the construction of the assembled oil-gas multiphase conveying flat-cavity intelligent heat insulation pipeline structure is completed.

The pipe monomers are organically combined together through the formed integral node. The GFRP anti-buckling energy dissipation dampers are symmetrically arranged on the side faces of the pipeline monomers at certain intervals, when the pipeline monomers are disturbed by the outside to move, the GFRP anti-buckling energy dissipation dampers can stop the movement of the pipeline monomers in real time, the energy of the pipeline monomers is consumed, the pipeline monomers are guaranteed not to be damaged, and when the pipeline vibrates, the dampers can control the whole pipeline in real time.

The inner layer GFRP circular tube and the annular heat transfer plate are concentrically and vertically placed in the outer layer GFRP circular tube, and self-compacting fine stone concrete is poured from top to bottom to form a single pipeline body, so that the single pipeline body is conveniently connected with the integral node.

The pipeline monomer adopts integral nodal connection, fine assurance whole pipeline structure's leakproofness.

Protect conductor wire and heat pipe through upper and lower circular steel tube maintenance structure, the device can be with the solar energy storage of absorbing daytime and change into heat energy, transmits for whole pipeline through the annular heat transfer plate to realize pipeline intelligence accuse temperature, annular heat transfer plate can not take place easily to destroy between inside and outside two-layer GFRP pipe simultaneously.

The GFRP anti-buckling energy dissipation dampers are horizontally and symmetrically arranged on the side faces of the pipeline monomers, one ends of the GFRP anti-buckling energy dissipation dampers are connected with the pipeline monomers through claw type connecting pieces, the other ends of the GFRP anti-buckling energy dissipation dampers are connected with the foundation in a hinged mode, and therefore the GFRP anti-buckling energy dissipation dampers can only provide damping force and do not provide redundant restraint. The GFRP anti-buckling energy dissipation damper can play a role in connection and fixation and can play an energy dissipation and shock absorption role in the coming earthquake, two pipelines are adopted to convey media simultaneously, and conveying modes are enriched and conveying efficiency is improved.

The single pipe body can be one of a straight pipe body, a curved pipe body or a crossing pipe body. The pipeline monomer can arrange in multiple forms, changes the direction of pipeline as required, can avoid complex topography such as mountain range and river, shortens construction cycle greatly.

The pipeline can adopt one or a combination of a plurality of forms of a straight pipeline monomer, a curved pipeline monomer or a crossing pipeline monomer.

Example one

Referring to fig. 1, the assembled oil-gas multiphase conveying flat cavity intelligent heat preservation pipeline structure is formed by connecting two pipelines through GFRP anti-buckling energy dissipation dampers, wherein a single pipeline is formed by connecting straight pipeline monomers through integral type nodes, as shown in fig. 4 and 5, each straight pipeline monomer is formed by inner and outer layers of seamless winding type GFRP circular pipes, annular heat transfer plates and interlayer self-compacting fine stone concrete, as shown in fig. 8, 9, 10 and 11, GFRP anti-shearing connecting keys are arranged on the inner sides of the outer layer GFRP circular pipes according to a certain rule, GFRP high-strength bolts are arranged on the outer sides of the inner layer GFRP circular pipes according to a certain rule, the annular heat transfer plates are fixed with the inner layer GFRP circular pipes through double positioning nuts, the straight pipeline monomers are connected in situ through integral type nodes, as shown in fig. 6 and 7, the integral type nodes are formed by the inner and outer layers of GFRP circular pipes and the annular heat transfer plates, and the nodes without concrete are integrally connected with the two pipeline, The annular heat transfer plate in the pipeline monomer and the annular heat transfer plate at the joint are connected and fixed, and self-compacting fine stone concrete is poured into the fixed joint. Referring to fig. 1, GFRP buckling-restrained energy-dissipation dampers are horizontally arranged at intervals between the outer sides of two pipelines and between the pipelines, and intelligent temperature control devices (the temperature control devices are solar energy-electricity-heat conversion temperature control devices) are arranged at intervals on the pipelines, and each intelligent temperature control device is composed of a solar photovoltaic power generation plate, an electric heat converter, a conductive wire, a heat conduction pipe and upper and lower round steel pipe maintenance structures, wherein the lower part of the heat conduction pipe is reliably connected with an annular heat transfer plate, the upper part of the heat conduction pipe is connected with the electric heat converter, and the electric heat converter is connected with the solar. The conductor wire and the heat conduction pipe are protected by the upper round steel pipe maintenance structure and the lower round steel pipe maintenance structure. The device can be with the solar energy storage of daytime absorbing and change into heat energy, transmits whole pipeline for through annular heat transfer plate to realize pipeline intelligence accuse temperature. The displacement deformation of the pipeline is controlled within an allowable range, and the structural safety and smooth conveying of the pipeline are ensured. This kind of heterogeneous flat chamber intelligence heat preservation pipeline structure of carrying of assembled oil gas sets up two pipelines and carries the medium simultaneously, can improve conveying efficiency, also can enrich the transport mode, the GFRP pipe material tensile strength that this kind of heterogeneous flat chamber intelligence heat preservation pipeline structure of carrying of assembled oil gas adopted is high, the quality is light, good construction manufacturability has, corrosion resisting property is good, it is insensitive to temperature variation, the heat-proof quality is good, be convenient for in high and strict cold district and saline and alkaline region application, can carry the liquid and the gas that steel pipeline can not carry simultaneously, can ensure the stability of carrying the medium simultaneously.

As shown in fig. 4, bolt holes are reserved at two ends of the inner and outer layers of GFRP round pipes and the annular heat transfer plate, as shown in fig. 14 and 15, bolt holes are reserved at two ends of the inner and outer layers of GFRP round pipes and the annular heat transfer plate, bolt holes and heat pipe mounting holes are reserved on the side surface and the upper surface of the outer layer of GFRP round pipe, a shear-resistant connecting key is arranged at the inner side of the outer layer of GFRP round pipe, GFRP high-strength bolts are arranged in advance at the outer side of the inner layer of GFRP round pipe, bolt holes are reserved at corresponding positions on the annular heat transfer plate, so that the bolt holes correspond to the positions of the GFRP high-strength bolts on the inner layer of GFRP round pipe, then the annular heat transfer plate is connected and fixed with the inner layer of GFRP round. An inner layer GFRP circular pipe with an annular heat transfer plate is concentrically and vertically placed in an outer layer GFRP circular pipe, and bolt holes reserved in the inner layer GFRP circular pipe and the outer layer GFRP circular pipe are guaranteed to be in one-to-one correspondence. And the lower round steel tube maintenance structure is fixed on the outer layer GFRP circular tube through the steel anchor frame, one end of the heat conduction tube is connected with the annular heat transfer plate through the heat conduction tube mounting hole, and the other end of the heat conduction tube is led out through the lower round steel tube maintenance structure. Self-compacting fine stone concrete is poured from top to bottom to form a pipeline monomer, so that the pipeline monomer is conveniently connected with the integral node. The inner surface of the assembled oil-gas multiphase conveying flat cavity intelligent heat-insulating pipeline structure is smooth, the resistance to conveying media is small, deposited media are relatively few, and the conveying efficiency of the pipeline can be greatly improved.

As shown in fig. 6 and 7, the integral node is composed of inner and outer layers of GFRP round pipes, an annular heat transfer plate and self-compacting fine stone concrete, GFRP shear-resistant connecting keys are arranged on the inner side of the outer layer of the GFRP round pipe according to a certain rule, GFRP high-strength bolts are arranged on the outer side of the inner layer of the GFRP round pipe according to a certain rule, bolt holes are reserved on the annular heat transfer plate to enable the bolt holes to correspond to the positions of the GFRP high-strength bolts, the annular heat transfer plate and the inner layer of the GFRP round pipe are fixed through double positioning nuts, bolt holes are reserved at two ends of the inner and outer layers of the GFRP round pipe, the high-strength bolts are connected with an assembled oil-gas multiphase conveying flat cavity intelligent heat-insulating pipeline monomer, and the. The pipeline adopts integral nodal connection, fine assurance whole pipeline structure's leakproofness. The assembly type connection of pipelines is realized by local cast-in-place concrete, and the connection mode of the traditional pipelines is changed. The pipeline is durable and meets the requirement of the design service life.

As shown in fig. 14, 16, 17 and 18, GFRP buckling-restrained energy-dissipation dampers are arranged between two pipelines and on the outer side of the assembled oil-gas multiphase conveying flat-cavity intelligent heat-insulating pipeline structure, two ends of the GFRP buckling-restrained energy-dissipation damper between the pipelines are connected with claw-type connectors pre-installed on outer GFRP round pipes of the two pipelines, and the connection modes are hinged; one end of a GFRP buckling-restrained energy-dissipation damper horizontally arranged on the outer side of the pipeline is connected with the pipeline through a claw-type connecting piece, the other end of the GFRP buckling-restrained energy-dissipation damper is connected with the foundation, and the two ends of the GFRP buckling-restrained energy-dissipation damper are hinged. The GFRP buckling-restrained energy dissipation damper can play a role in lateral fixation in an assembled oil-gas multiphase conveying flat-cavity intelligent heat-insulation pipeline structure, can play a role in energy dissipation and shock absorption in an earthquake, and effectively improves the anti-seismic performance of the pipeline.

As shown in fig. 19, the solar-electric heat converter is arranged on the assembled oil-gas multiphase conveying flat-cavity intelligent heat preservation pipeline, the device is composed of a solar photovoltaic power generation plate, an electric heat converter, a conducting wire, a heat conduction pipe and an upper round steel pipe and a lower round steel pipe maintenance structure, the lower portion of the heat conduction pipe is reliably connected with an annular heat conduction plate, the upper portion of the heat conduction pipe is connected with the electric heat converter, and the electric heat converter is connected with the solar photovoltaic power generation plate through the conducting wire. The conductor wire and the heat conduction pipe are protected by the upper round steel pipe maintenance structure and the lower round steel pipe maintenance structure. The device can be with the solar energy storage of daytime absorbing and change into heat energy, transmits whole pipeline for through annular heat transfer plate to realize pipeline intelligence accuse temperature.

The construction method comprises the following steps: the construction steps are as described above.

Example two

Referring to fig. 2, the assembled oil-gas multiphase conveying flat cavity intelligent heat preservation pipeline structure is formed by connecting two pipelines through GFRP buckling-restrained energy dissipation dampers, wherein a single pipeline is formed by connecting straight pipeline monomers and curved pipeline monomers through integral type nodes, as shown in fig. 12, the curved pipeline monomers are formed by inner and outer layers of seamless winding type GFRP circular pipes, annular heat transfer plates and interlayer self-compacting fine stone concrete, as shown in fig. 9 and 11, GFRP shearing-resistant connecting keys are arranged on the inner side of the outer layer GFRP circular pipe according to a certain rule, GFRP high-strength bolts are arranged on the outer side of the inner layer GFRP circular pipe according to a certain rule, the annular heat transfer plates are fixed with the inner layer GFRP circular pipe through double positioning nuts, the straight pipeline monomers and the curved pipeline monomers are connected in site through the integral type nodes, as shown in fig. 6 and 7, the integral type nodes are formed by the inner and outer layers of GFRP circular pipes, the annular heat transfer, GFRP high-strength bolts are arranged on the outer side of a GFRP circular tube on the inner layer of the node according to a certain rule, bolt holes are reserved on an annular heat transfer plate, the bolt holes correspond to the positions of the GFRP high-strength bolts, the annular heat transfer plate is fixed with the inner layer of the GFRP circular tube through double positioning nuts, the bolt holes are reserved at two end parts of the GFRP circular tube on the inner layer and the outer layer of the GFRP circular tube, the annular heat transfer plate is connected with an intelligent heat-insulating pipeline monomer of an assembled oil-gas multiphase conveying flat cavity through the high-strength bolts, self-compacting fine stone concrete is poured into a fixed integral node without pouring concrete, GFRP buckling-resistant energy-consuming dampers are symmetrically arranged between the outer sides of the two pipelines and the pipelines at certain intervals as shown in a combined figure 2, solar-electric heat converters are arranged on the pipelines at intervals, the device consists of a photovoltaic power generation board, the upper part of the solar photovoltaic power generation panel is connected with an electric heating converter, the electric heating converter is connected with the solar photovoltaic power generation panel through a conducting wire, and the conducting wire and the heat conducting pipe are protected through an upper round steel pipe maintenance structure and a lower round steel pipe maintenance structure. The device can be with the solar energy storage of daytime absorbing and change into heat energy, transmits whole pipeline for through annular heat transfer plate to realize pipeline intelligence accuse temperature. The intelligent heat-insulating pipeline of the multiphase conveying flat cavity of the assembled oil gas has strong applicability, the pipeline can be linearly and curvilinearly arranged and combined, the problem of the limitation of the traditional pipeline is solved, the pipeline can be buried underground and can also be arranged on the ground, the pipeline is flexibly arranged aiming at complex terrains, mountains, rivers and the like can be avoided, and the construction period is greatly shortened.

The construction method comprises the following steps: firstly, prefabricating a single curved pipeline in a factory, and manufacturing an inner layer GFRP circular pipe, an outer layer GFRP circular pipe, a GFRP shearing-resistant connecting key, a GFRP high-strength bolt, a matched nut, an annular heat transfer plate, a claw type connecting piece, a steel anchor frame and a temperature control device according to the size requirement. And arranging a GFRP high-strength bolt on the inner-layer GFRP circular pipe, reserving bolt holes on the annular heat transfer plate, enabling the bolt holes to correspond to the GFRP high-strength bolt on the inner-layer GFRP circular pipe, and then connecting and fixing the annular heat transfer plate by adopting double positioning nuts. The inner side of the outer layer GFRP circular pipe is provided with a GFRP shearing-resistant connecting key, bolt holes are reserved at two end parts of the inner layer GFRP circular pipe and the outer layer GFRP circular pipe, bolt holes and heat conduction pipe mounting holes are reserved at designed positions on the outer layer GFRP circular pipe, and the claw type connecting piece, the steel anchor frame and the outer layer GFRP circular pipe are fixedly connected through the high-strength bolt. The inner GFRP circular tube with the annular heat transfer plate is concentrically placed in the outer GFRP circular tube, the heat transfer pipe is connected with the annular heat transfer plate between the inner GFRP circular tube and the outer GFRP circular tube through the heat transfer pipe mounting hole, the lower circular steel tube maintenance structure is welded on the steel anchor frame, and the heat transfer pipe is led out through the lower circular steel tube maintenance structure. The method comprises the steps of arranging the assembled non-cast concrete curved pipeline in a vertical mode, reliably fixing, screwing high-strength bolts at two ends, pouring self-compacting fine stone concrete among the annular heat transfer plate, the inner layer GFRP circular pipe and the outer layer GFRP circular pipe from the higher end, loosening and repeatedly twisting the high-strength bolts after initial setting of the concrete to form bolt holes, and forming a curved pipeline monomer after maintenance. The other construction methods are the same as the first embodiment.

EXAMPLE III

Referring to fig. 3, the assembled oil-gas multiphase conveying flat cavity intelligent heat preservation pipeline structure is formed by connecting two pipelines through GFRP buckling-restrained energy dissipation dampers, wherein a single pipeline is formed by connecting a straight pipeline monomer and a crossing pipeline monomer through an integral node, as shown in fig. 13, the crossing pipeline monomer is formed by inner and outer seamless winding type GFRP circular pipes and self-compacting fine stone concrete clamped in an annular heat transfer plate, as shown in fig. 9 and 11, GFRP shearing-resistant connecting keys are arranged on the inner side of the outer GFRP circular pipe according to a certain rule, GFRP high-strength bolts are arranged on the outer side of the inner GFRP circular pipe according to a certain rule, the annular heat transfer plate is fixed with the inner GFRP circular pipe through double positioning nuts, the straight pipeline monomer and the crossing pipeline monomer are connected in situ through the integral node, as shown in fig. 6 and 7, the integral node is formed by the inner and outer GFRP circular pipes, the annular heat transfer plate and the self-compacting fine, GFRP high-strength bolts are arranged on the outer side of the inner-layer GFRP circular tube according to a certain rule, bolt holes are reserved in the annular heat transfer plate, the bolt holes correspond to the positions of the GFRP high-strength bolts, the annular heat transfer plate and the inner-layer GFRP circular tube are fixed through double positioning nuts, bolt holes are reserved in two end portions of the inner-layer GFRP circular tube and the outer-layer GFRP circular tube, the high-strength bolts are connected with an assembly type oil-gas multiphase conveying flat cavity intelligent heat-insulation pipeline monomer, and self-compacting fine stone concrete is poured into the fixed integral node without pouring concrete. Referring to fig. 3, GFRP buckling-restrained energy-dissipation dampers are horizontally arranged at intervals between the outer sides of two pipes and the pipes, and solar-electric heat converters are arranged at intervals on the pipes, the device is composed of a photovoltaic power generation plate, an electric heat converter, a conducting wire, a heat conducting pipe and an upper round steel pipe maintenance structure and a lower round steel pipe maintenance structure, the lower portion of the heat conducting pipe is reliably connected with an annular heat transfer plate, the upper portion of the heat conducting pipe is connected with the electric heat converter, and the electric heat converter is connected with the solar photovoltaic power generation. The conductor wire and the heat conduction pipe are protected by the upper round steel pipe maintenance structure and the lower round steel pipe maintenance structure. The device can be with the solar energy storage of daytime absorbing and change into heat energy, transmits whole pipeline for through annular heat transfer plate to realize pipeline intelligence accuse temperature. The intelligent heat-insulating pipeline of the horizontal cavity is conveyed by the assembled oil gas in a multiphase mode, has strong applicability, can be linearly and curvedly arranged and combined in a crossing mode, solves the problem of single limitation of the traditional pipeline, can be buried underground, can also be arranged on the ground, is flexibly arranged aiming at complex terrains, can avoid mountains, rivers and the like, and greatly shortens the construction period.

The construction method comprises the following steps: prefabricating a crossing type pipeline monomer in a factory, and manufacturing an inner layer GFRP circular pipe, an outer layer GFRP circular pipe, a GFRP shearing-resistant connecting key, a GFRP high-strength bolt, a matched nut, an annular heat transfer plate, a claw type connecting piece, a steel anchor frame and a temperature control device according to the size requirement. And arranging a GFRP high-strength bolt on the inner-layer GFRP circular pipe, reserving bolt holes on the annular heat transfer plate, enabling the bolt holes to correspond to the GFRP high-strength bolt on the inner-layer GFRP circular pipe, and then connecting and fixing the annular heat transfer plate by adopting double positioning nuts. The inner side of the outer layer GFRP circular pipe is provided with a GFRP shearing-resistant connecting key, bolt holes are reserved at two end parts of the inner layer GFRP circular pipe and the outer layer GFRP circular pipe, bolt holes and heat conduction pipe mounting holes are reserved at designed positions on the outer layer GFRP circular pipe, and the claw type connecting piece, the steel anchor frame and the outer layer GFRP circular pipe are fixedly connected through the high-strength bolt. Then an inner GFRP circular tube with an annular heat transfer plate is concentrically placed in an outer GFRP circular tube, the heat transfer tube is connected with the annular heat transfer plate between the inner GFRP circular tube and the outer GFRP circular tube through a heat transfer tube mounting hole, a lower circular steel tube maintenance structure is welded on the steel anchor frame, and the heat transfer tube is led out through the lower circular steel tube maintenance structure. The crossing type pipeline which is assembled with the un-cast concrete is arranged in a concave shape and is reliably fixed, the arrangement is opposite to that in practical engineering application, high-strength bolts at two ends are screwed, self-compaction fine stone concrete is filled among the annular heat transfer plate, the inner layer GFRP circular pipe and the outer layer GFRP circular pipe from the other end, after the concrete is initially set, the high-strength bolts are loosened and repeatedly twisted to form bolt holes, and a crossing type pipeline monomer is formed after maintenance. The other construction methods are the same as the first embodiment.

In conclusion, the assembly type connection of the pipelines is realized by local cast-in-place self-compacting concrete, the connection mode of the traditional pipeline is changed, the pipeline can be well sealed for a long time and is durable, and the requirement of design service life is met; the combined section form of GFRP and self-compacting concrete is adopted, the mechanical properties of two materials are fully utilized, the bearing capacity and the stability of the pipeline are greatly improved, and the self-compacting concrete is suitable for a conveying pipeline with a large pipe diameter; two pipelines are adopted to simultaneously convey media, one medium can be conveyed, and two media can be conveyed simultaneously, so that the conveying mode is enriched, and the conveying efficiency is improved; the GFRP buckling-restrained energy-dissipation damper is adopted, so that the fixing connection effect can be achieved, the energy-dissipation and shock-absorption effects can be achieved during an earthquake, and the anti-seismic performance of the pipeline is improved; the adopted GFRP circular tube non-metal material has high tensile strength, light weight, good construction manufacturability, good corrosion resistance, insensitivity to temperature change and good heat insulation, is convenient to be applied in high-stringency cold regions and saline-alkali regions, can convey liquid and gas which cannot be conveyed by steel pipelines, and simultaneously ensures the stability of conveyed media; the pipeline is provided with the temperature control device, and the device can store and convert absorbed solar energy into heat energy in daytime and transmit the heat energy to the whole pipeline through the heat conduction pipe and the annular heat transfer plate, so that intelligent temperature control is realized; the pipeline has strong applicability, can be arranged in a straight line, a curve and a crossing way, solves the problem of limitation of the traditional pipeline, can be buried underground or arranged on the ground, can be flexibly arranged aiming at complex terrains, and can avoid mountains, rivers and the like; the inner surface of the pipeline is smooth, the resistance to the conveying medium is small, the deposited medium is relatively less, and the conveying efficiency of the pipeline can be greatly improved; the single pipeline and the integral node can be prefabricated in a factory and installed on site, so that the construction period is greatly shortened; the pipeline has good waterproof performance and strong freeze-thaw resistance in the underground complex environment, and can obviously improve the fatigue resistance of the pipeline.

Claims

1. An assembled oil and gas multiphase conveying flat cavity intelligent thermal insulation pipeline structure is characterized in that: two pipelines are connected by a GFRP anti-buckling energy dissipation damper (25), and the two pipelines are arranged side by side in parallel, and each pipeline Including a pipeline unit (1) and an integral node (4), the pipeline unit (1) includes an outer layer GFRP round pipe (12), an inner layer GFRP round pipe (13), a self-compacting fine stone concrete layer (23) and The annular heat transfer plate (14), the inner wall of the outer GFRP circular tube (12) is evenly distributed with several shear connecting keys (5) in the circumferential direction, and the outer GFRP circular tube (12) is surrounded by the inner GFRP circular tube (13) , an interlayer is arranged between the outer layer GFRP round tube (12) and the inner layer GFRP round tube (13), and an annular heat transfer plate (14) is arranged in the interlayer, and the space between the annular heat transfer plate (14) and the tube wall is filled with The dense fine stone concrete layer (23), a plurality of GFRP high-strength bolts (7) are evenly distributed on the outer wall of the inner layer of the GFRP round pipe (13), and the GFRP high-strength bolts (7) pass the annular transmission through the double positioning nuts (9). The hot plate (14) is fixed to the inner layer GFRP round pipe (13), the two ends of the single pipe (1) are respectively provided with bolt holes (6), and the bolt holes (6) penetrate through the outer layer GFRP round pipe (12). ), inner layer GFRP round pipe (13), self-compacting fine stone concrete layer (23) and annular heat transfer plate (14); the outer wall of the outer layer GFRP round pipe (12) is provided with an outer layer GFRP round pipe preheater. The bolt holes (28) and the heat pipe installation holes (22) are reserved, and the steel anchor frame (21) is installed outside the heat pipe installation hole (22). The steel anchor frame (21) is provided with a temperature control device. The hot plate (14) is connected; the two pipeline monomers (1) are connected by an integral joint (4), and the integrated joint (4) is connected to the end of the two pipeline monomers (1) through high-strength bolts (8). The bolt holes (6) are connected, and the outer wall of the integral joint (4) is provided with concrete pouring holes (10) and exhaust holes (11), and the concrete pouring holes (10) and the exhaust holes (11) are distributed at intervals; The integral joint (4) includes an outer layer of GFRP round pipes (12), an inner layer of GFRP round pipes (13), a self-compacting fine stone concrete layer (23) and an annular heat transfer plate (14), and an outer layer of GFRP round pipes (12) ) There are several shear connecting keys (5) evenly distributed on the inner wall, the outer GFRP circular tube (12) is surrounded by the inner GFRP circular tube (13), the outer GFRP circular tube (12) and the inner GFRP circular tube There is an interlayer between (13), an annular heat transfer plate (14) is arranged in the interlayer, and a self-compacting fine stone concrete layer (23) is filled between the annular heat transfer plate (14) and the tube wall. The inner layer of GFRP Several GFRP high-strength bolts (7) are evenly distributed on the outer wall of the circular tube (13) in the circumferential direction, and the GFRP high-strength bolts (7) fix the annular heat transfer plate (14) to the inner GFRP circular tube (13) by means of double positioning nuts (9). .

2. The prefabricated oil and gas multiphase transportation flat cavity intelligent thermal insulation pipeline structure according to claim 1, characterized in that: the outer diameter size of the inner layer GFRP round pipe (13) of the integral node (4) is the same as the pipeline single size. The inner diameter of the inner GFRP circular tube (13) of the body (1) is equal; the inner diameter of the outer GFRP circular tube (12) of the integral node (4) is the same as the outer GFRP circular tube (12) of the pipeline unit (1). Outer diameters are equal in size.

3. The prefabricated oil and gas multiphase conveying flat cavity intelligent thermal insulation pipeline structure according to claim 1, characterized in that: the outer wall of the outer layer GFRP round pipe (12) of the integral node (4) is provided with concrete pouring The holes (10) and the exhaust holes (11), the concrete pouring holes (10) and the exhaust holes (11) are distributed at intervals; the annular heat transfer plate (14) of the integral node (4) is also provided with concrete pouring holes ( 10) and the vent hole (11), the concrete pouring hole (10) and the vent hole (11) are in one-to-one correspondence with the upper and lower positions.

4. The prefabricated oil and gas multiphase conveying flat cavity intelligent thermal insulation pipeline structure according to claim 1, characterized in that: the temperature control device comprises a solar photovoltaic panel (15), an electrothermal converter (16), a conductive wire (17) and a heat transfer pipe (18), the solar photovoltaic panel (15) is connected to the electrothermal converter (16) through a conductive wire (17), and the electrothermal converter (16) is connected to the annular heat transfer plate (16) through the heat transfer pipe (18). 14) Connection, the conductive wire (17) and the heat transfer pipe (18) are respectively covered with an upper round steel pipe maintenance structure (19) and a lower round steel pipe maintenance structure (20), and the lower round steel pipe maintenance structure (20) passes through the steel pipe. The anchor frame (21) is fixed on the outer wall of the pipeline unit (1); the upper part of the lower circular steel pipe maintenance structure (20), the electric heating converter (16), the upper circular steel pipe maintenance structure (19) and the solar photovoltaic panel ( 15) on the ground (27).

5. The prefabricated oil and gas multiphase conveying flat cavity intelligent thermal insulation pipeline structure according to claim 1, characterized in that: the pipeline monomer (1) is a single pipe and the cross-section is annular; the outer layer The GFRP round pipe (12) and the inner layer GFRP round pipe (13) are seamless wound GFRP round pipes; the pipes are double pipes and have a circular cross section.

6. The prefabricated oil and gas multiphase transportation flat cavity intelligent thermal insulation pipeline structure according to claim 1, characterized in that: the pipeline monomer (1) is a linear pipeline monomer, a curved pipeline monomer (2) or One of the spanning pipeline monomers (3).

7. The prefabricated oil and gas multiphase conveying flat cavity intelligent thermal insulation pipeline structure according to claim 1, characterized in that GFRP anti-buckling energy dissipation dampers (25) are arranged horizontally symmetrically on the side of the pipeline unit (1), One end of the GFRP anti-buckling energy-dissipating damper (25) is connected to the outer wall of the pipeline unit (1) through a claw-type connecting piece (24), and the other end of the GFRP anti-buckling energy-dissipating damper (25) is hinged with the foundation (26); the claw type One end of the connecting piece (24) is provided with a circular ring and is hinged with the GFRP anti-buckling energy dissipation damper (25), and the other end of the claw connecting piece (24) is provided with reserved bolt holes, and the reserved bolt holes pass through the high-strength bolts (8) Connect with the reserved bolt holes (28) of the outer GFRP round pipe.

8. The assembled oil and gas multiphase conveying flat cavity intelligent thermal insulation pipeline structure according to claim 1, characterized in that: the two ends of the GFRP anti-buckling energy dissipation damper (25) between the two pipelines are respectively connected to the One end of a claw-type connector (24) is hinged, and the other end of the claw-type connector (24) is respectively connected with the outer GFRP round pipe of the outer wall of the corresponding pipeline unit (1) through high-strength bolts (8) to reserve bolt holes for bolt holes. (28) CONNECTIONS.

9. A construction method of an assembled oil and gas multiphase conveying flat cavity intelligent thermal insulation pipeline structure according to claim 1, is characterized in that: the method steps are as follows:

1) First, prefabricate the combined pipe unit (1) in the factory, and make the inner GFRP round pipe (13), the outer GFRP round pipe (12), the shear connecting key (5), and the GFRP high-strength bolt (7) according to the size requirements. , Double positioning nut (9), annular heat transfer plate (14), claw connector (24), steel anchor frame (21) and temperature control device matched with GFRP high-strength bolts (7), the inner GFRP round pipe (13) Arrange GFRP high-strength bolts (7) on the annular heat transfer plate (14), and reserve bolt holes on the annular heat transfer plate (14) so that the bolt holes correspond to the GFRP high-strength bolts (7) on the inner GFRP round pipe (13), and then The annular heat transfer plate (14) is connected and fixed with the inner GFRP round tube (13) by means of double positioning nuts (9), and a shear connecting key (5) is arranged on the inner side of the outer GFRP round tube (12). Bolt holes (6) are reserved at the two ends of the layer GFRP round pipe, and bolt holes (28) and heat pipe mounting holes ( 22), connect the claw connector (24) and the steel anchor frame (21) to the outer GFRP round tube (12) through high-strength bolts (8), and connect the inner GFRP with the annular heat transfer plate (14). The round tube (13) is placed concentrically and vertically in the outer GFRP round tube (12), and the heat transfer tube (18) is connected to the annular heat transfer plate (14) between the inner and outer GFRP round tubes through the heat transfer tube mounting hole (22). The lower round steel pipe maintenance structure (20) is welded to the steel anchor frame (21), the heat transfer pipe (18) is led out through the lower round steel pipe maintenance structure (20), the high-strength bolts (8) at both ends are tightened, and then from the upper The self-compacting fine stone concrete layer (23) is poured downward simultaneously between the annular heat transfer plate (14), the inner GFRP circular tube (13) and the outer GFRP circular tube (12), and after the concrete is initially set, loosen it. And repeatedly twist the high-strength bolts to form bolt holes, and form a combined pipeline unit (1) after curing;

2) The inner layer GFRP round tube (13), the outer layer GFRP round tube (12) and the annular heat transfer plate (14) for forming the monolithic node (4) are prefabricated in the factory, and the inner layer of the monolithic node (4) GFRP high-strength bolts (7) are arranged on the GFRP round pipe (13), and bolt holes are reserved on the annular heat transfer plate (14) of the integral node (4), so that the bolt holes are The GFRP high-strength bolts (7) correspond to each other, and then the annular heat transfer plate (14) is connected and fixed with the inner GFRP round tube (13) through the double positioning nuts (9). The inner side of (12) is provided with a shear connecting key (5), bolt holes (6) are reserved at the two ends of the inner and outer GFRP round pipes, and the outer GFRP round pipe (12) of the integral joint (4) Concrete pouring holes (10) and exhaust holes (11) are reserved at the top of ), and concrete pouring holes (10) and exhaust holes (10) are reserved at the corresponding positions on the annular heat transfer plate (14) at the integral node (4). Air hole (11);

3) Transport the prefabricated pipe unit (1) and the inner layer GFRP round pipe (13), outer layer GFRP round pipe (12) and annular heat transfer plate (14) of the integral node (4) to the site, and then The single pipe (1) is arranged on the site soil, and then the inner GFRP round pipe (13) and the annular heat transfer plate (14) that have been connected and fixed to the integral joint (4) are placed on the outer GFRP round pipe (14). 12), the three are concentrically inserted into the pipeline unit (1), the pipeline unit (1) and the unconcrete integral joint (4) are fixedly connected with high-strength bolts (8), and then the concrete pump is used to pass the The concrete pouring hole (10) on the annular heat transfer plate (14) pours the mixed self-compacting fine stone concrete into the annular heat transfer plate (14) and the inner GFRP round pipe (13) of the integral joint (4) In between, stop pouring when the concrete overflows at the vent hole (11) on the annular heat transfer plate (14), and then pour the self-compacting fine stone through the concrete pouring hole (10) on the outer GFRP round pipe (12). Concrete is poured between the annular heat transfer plate (14) of the integral joint (4) and the outer GFRP circular pipe (12), when the concrete overflows from the exhaust hole (11) on the outer GFRP circular pipe (12) Stop the perfusion, and connect the pipeline monomers (1) in turn by using the integral node (4);

4) The GFRP anti-buckling energy dissipation damper (25) is prefabricated in the factory, and one end of the GFRP anti-buckling energy dissipation damper (25) is connected to the ring of the claw connector (24) at the site through high-strength bolts (8), and the other end is connected to the foundation (26), The connections at both ends are hinged, and the GFRP anti-buckling energy dissipation damper (25) used to connect the two pipes is connected to the ring of the claw-type connector (24) inside the two pipes through high-strength bolts (8). The connection methods are all hinged, and GFRP anti-buckling energy dissipation dampers (25) are symmetrically arranged at intervals along the pipeline direction;

5) Connect the installed lower round steel pipe maintenance structure (20) and heat transfer pipe (18) to the electric-heat converter (16) on site, and then convert the electric heat through the upper round steel pipe maintenance structure (19) and the conductive wire (17). The device (16) is connected to the solar photovoltaic power generation panel (15), and intelligent temperature control devices are arranged on the pipeline in the above manner at intervals, that is, the construction of the prefabricated oil and gas multiphase conveying flat cavity intelligent thermal insulation pipeline structure is completed.