CN112856229A - Gas is jacket pipe and gas system for pipeline - Google Patents
Gas is jacket pipe and gas system for pipeline Download PDFInfo
- Publication number
- CN112856229A CN112856229A CN202011560823.1A CN202011560823A CN112856229A CN 112856229 A CN112856229 A CN 112856229A CN 202011560823 A CN202011560823 A CN 202011560823A CN 112856229 A CN112856229 A CN 112856229A
- Authority
- CN
- China
- Prior art keywords
- pipe
- sleeve
- inner pipe
- section
- jacket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 58
- 239000007789 gas Substances 0.000 claims abstract description 56
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 239000011229 interlayer Substances 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 26
- 239000010410 layer Substances 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 238000003466 welding Methods 0.000 claims description 7
- 230000003044 adaptive effect Effects 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- 239000001301 oxygen Substances 0.000 abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002737 fuel gas Substances 0.000 abstract description 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
- F16L25/14—Joints for pipes of different diameters or cross-section
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
- F16L39/005—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies for concentric pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/02—Branch units, e.g. made in one piece, welded, riveted
- F16L41/021—T- or cross-pieces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L43/00—Bends; Siphons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipeline Systems (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides a jacketed pipe for a gas pipeline and a gas system, relates to the technical field of gas conveying pipeline equipment, is suitable for occasions where the gas pipeline needs to be protected by a jacketed pipe, is not limited by length and pipe fittings, and is very convenient to maintain; the jacket sleeve comprises a first straight pipe section, a second straight pipe section, an elbow section, a three-way section, a different-diameter section and a sealing detection device, wherein the inner pipes of the first straight pipe section, the second straight pipe section, the elbow section, the three-way section and the different-diameter section are connected to form an inner jacket sleeve pipe; the jacketed pipe provided by the invention has the advantages that the inner pipe is protected by the outer pipe, the outer pipe is connected in a coating and sealing manner, a micro-positive pressure nitrogen is filled in the interlayer cavity to prevent the formation of a closed space with oxygen, the use length of the jacketed pipe is not limited, and the fuel gas can be safely transmitted.
Description
Technical Field
The invention relates to the technical field of gas conveying pipeline equipment, in particular to a jacketed pipe for a gas pipeline and a gas system.
Background
Protective measures are often required to be taken in the process of gas pipeline construction, and various problems exist in the existing protective measures. For example, the reinforced concrete casing pipe is used for protection, and the reinforced concrete pipe trench is inconvenient to construct due to large workload and heavy weight of field construction, needs to occupy larger space, is easy to damage a gas pipeline during construction, and has larger potential safety hazard; when the sleeve pipe protection is used, the requirement that the pipeline in the sleeve pipe cannot have a welding line limits the length of the pipe section of the jacketed pipe, namely, the length of the pipe section of the jacketed pipe cannot exceed that of one pipeline, when the gas pipeline with the length exceeding that of one pipeline needs to be protected, the overhead pipeline needs a professional pipe well, the buried pipeline needs a professional pipe ditch to be built, a large amount of manpower and material resources need to be consumed, the construction period is slowed down, and the later maintenance is very inconvenient.
The jacketed pipe is used as a pipeline sleeved on the outer side of the main pipe, so that the main pipe can be protected from the external environment, heat can be preserved for the main pipe, and the pipeline is prevented from being blocked or broken due to low temperature. In the prior art, the jacket pipe can be used in the petrochemical industry field in a mode of not limiting the length of a jacket pipe section, but the jacket pipe has high strength gas consumption on a pipeline because high-temperature and high-pressure steam needs to be operated in a cavity between an inner pipe and the jacket pipe, the welding process is complex, the installation is inconvenient, the construction period is long, and the jacket pipe cannot be directly applied to the gas industry to protect the gas pipeline. The invention provides a jacketed pipe suitable for the gas industry by referring to a jacketed pipe method in petrochemical engineering pipeline accompanying pipe and jacketed pipe design specification SH/T3040-2012 and improving and designing fittings, connection modes, operation modes and the like.
Disclosure of Invention
The invention aims to provide a jacketed pipe for a gas pipeline and a gas system, which are suitable for the use in the gas industry.
In order to achieve the above purpose, the invention provides the following technical scheme: a jacket sleeve for a gas pipeline comprises a first straight pipe section, a second straight pipe section, an elbow section for connecting the two first straight pipe sections, a tee section and a reducer section which are arranged on the first straight pipe section, and a sealing detection device;
the first straight pipe section comprises a first inner pipe, a first sleeve and a plurality of first positioning plates, wherein the first sleeve is sleeved outside the first inner pipe, and two axial ends of the first inner pipe respectively protrude out of two axial ends of the first sleeve; a plurality of first through holes are uniformly formed in the surface of the first positioning plate, the first positioning plate is sleeved on the outer wall of the first inner pipe at uniform intervals, the inner diameter of the first positioning plate is adaptive to the outer diameter of the first inner pipe, and the outer diameter of the first positioning plate is adaptive to the inner diameter of the first sleeve;
the second straight pipe section comprises a second inner pipe, a second sleeve and a plurality of second positioning plates, wherein the second sleeve is sleeved outside the second inner pipe, and two axial ends of the second inner pipe respectively protrude out of two axial ends of the second sleeve; a plurality of second through holes are uniformly formed in the surface of the second positioning plate, the second positioning plates are uniformly sleeved on the outer wall of the second inner pipe at intervals, the inner diameter of each second positioning plate is matched with the outer diameter of the second inner pipe, and the outer diameter of each second positioning plate is matched with the inner diameter of the second sleeve;
the elbow section comprises an elbow inner pipe and an elbow sleeve pipe sleeved outside the elbow inner pipe, two ends of the elbow inner pipe are respectively connected to the end parts of the first inner pipes of the two sections of first straight pipe sections, and the pipe diameter of the elbow inner pipe is equal to that of the first inner pipe; the end part of the elbow sleeve is sleeved outside the elbow inner pipe, the end parts of the two ends of the elbow sleeve respectively extend to the end part of one side of the first sleeve of the two sections of the first straight pipe sections, the end part of the elbow sleeve is partially coated on the outer wall of the first sleeve, and a first sealing layer is arranged between the end part of the elbow sleeve and the coating position of the outer wall of the first sleeve;
the three-way section comprises a three-way inner pipe and a three-way sleeve sleeved on the outer side of the three-way inner pipe, three-end openings of the three-way inner pipe are respectively connected to one side end part of a first inner pipe of the three first straight pipe sections, the three-way sleeve is sleeved on the outer side of the three-way inner pipe, the three-end openings of the three-way sleeve respectively extend to one side end part of the first sleeve of the three first straight pipe sections, the end part of the three-way sleeve is partially wrapped on the outer wall of the first sleeve, and a second sealing layer is arranged between the end part;
the reducing section is used for connecting the first straight pipe section and the second straight pipe section and comprises a reducing inner pipe and a reducing sleeve sleeved outside the reducing inner pipe; the reducing sleeve comprises a first section of sleeve matched with the pipe diameter of the first sleeve, a second section of sleeve matched with the pipe diameter of the second sleeve and a third section of sleeve used for connecting the first section of sleeve and the second section of sleeve, wherein the first section of sleeve extends to the end part of one side of the first sleeve, the end part of the first section of sleeve is partially coated on the outer wall of the first sleeve, and a third sealing layer is arranged between the end part of the first section of sleeve and the coating position of the outer wall of the first sleeve; the second section of sleeve extends to the end part of one side of the second sleeve, the end part of the second section of sleeve is partially coated on the outer wall of the second sleeve, and a fourth sealing layer is arranged between the end part of the second section of sleeve and the coating position of the outer wall of the second sleeve; the reducing inner pipe is adapted to the third section of sleeve, and two ends of the reducing inner pipe are respectively connected to the first inner pipe and the second inner pipe;
the first inner pipe, the second inner pipe, the elbow inner pipe, the tee joint inner pipe and the reducing inner pipe form a jacketed pipe inner pipe, the first sleeve, the second sleeve, the elbow sleeve, the tee joint sleeve and the reducing sleeve form a jacketed pipe outer pipe, an interlayer cavity is formed between the jacketed pipe inner pipe and the jacketed pipe outer pipe, and positive pressure inert gas is filled in the interlayer cavity;
the sealing detection device is arranged on the jacketed pipe and used for detecting the airtightness of the interlayer cavity.
Furthermore, the elbow casing pipe, the three-way casing pipe and the reducing casing pipe are all arranged into a cylindrical structure formed by splicing two semi-cylinders; the two sides of the opening of the semi-cylinders are respectively provided with a ribbed plate which extends outwards along the radial direction of the semi-cylinders, and the ribbed plates are used for being fixedly connected when the two semi-cylinders are spliced.
Furthermore, the length of the first inner pipe protruding from the end part of the first sleeve at any axial end of the first inner pipe is not less than the pipe diameter of the first inner pipe, and the length of the second inner pipe protruding from the end part of the second sleeve at any axial end of the second inner pipe is not less than the pipe diameter of the second inner pipe;
the pipe diameter of a first inner pipe in the first straight pipe section is defined as D1, the pipe diameter of a second inner pipe in the second straight pipe section is defined as D2, the distance between a first positioning plate adjacent to the end part of the first sleeve in the first straight pipe section and the end part of the first sleeve is defined as D3, the distance between a second positioning plate adjacent to the end part of the second sleeve in the second straight pipe section and the end part of the second sleeve is defined as D4, D3 is 0.5D1, and D4 is 0.5D 2.
Furthermore, two ends of the jacket pipe along the length direction are respectively provided with a plug, and the plugs are used for sealing the interlayer cavity; the plugging device is provided with a step structure which is coaxially arranged by two sections of reducing cylinders;
and defining the small-diameter cylinder in the step structure as a first cylinder and the large-diameter cylinder as a second cylinder, wherein the first cylinder is sleeved on the outer wall of the inner pipe of the jacket pipe in a sealing manner, and the second cylinder is sleeved on the outer wall of the outer pipe of the jacket pipe in a sealing manner.
Furthermore, the inner pipe and the outer pipe of the jacket pipe are both made of steel;
or the material of the inner pipe of the jacketed pipe is steel, and the material of the outer pipe of the jacketed pipe is PE or PVC;
or the material of the inner pipe of the jacketed pipe is PE, and the material of the outer pipe of the jacketed pipe is PE or PVC;
or the material of the inner pipe of the jacketed pipe is PE, and the material of the outer pipe of the jacketed pipe is steel.
Further, when the inner pipe of the jacketed pipe is made of steel, the first inner pipe, the elbow inner pipe, the tee inner pipe, the reducing inner pipe and the second inner pipe are welded;
and when the inner pipe of the jacket pipe is made of PE, the first inner pipe, the elbow inner pipe, the tee joint inner pipe, the reducing inner pipe and the second inner pipe are in hot melting connection or electric melting welding.
Further, the outer diameter of the inner pipe of the jacket pipe at the plugging and installing end on the jacket pipe is defined as D5, and the outer diameter of the outer pipe of the jacket pipe is defined as D6, so that the matching length of the first cylinder and the outer wall of the inner pipe of the jacket pipe along the axial direction is not more than D5-30mm, and the matching length of the second cylinder and the outer wall of the outer pipe of the jacket pipe along the axial direction is not less than D6.
Further, the sealing detection device comprises a sealing detection pipeline communicated with the interlayer cavity from the outer wall of the outer pipe of the self-clamping sleeve, a ball valve arranged on the sealing detection pipeline and a pressure gauge arranged on the side, far away from the jacket pipe, of the ball valve; the ball valve is in a normally closed state.
Furthermore, the matching length of the elbow sleeve, the three-way sleeve and the outer wall of the first sleeve along the axial direction is not less than the outer diameter of the first inner pipe.
The invention also discloses a gas system which comprises the jacket sleeve for the gas pipeline.
According to the technical scheme, the jacketed pipe for the gas pipeline and the gas system provided by the technical scheme of the invention have the following beneficial effects:
the jacketed pipe for the gas pipeline and the gas system are suitable for gas conveying, and the jacketed pipe is long in pipeline and convenient to maintain; the jacket sleeve comprises a first straight pipe section, a second straight pipe section, an elbow section, a three-way section, a different-diameter section and a sealing detection device, wherein the inner pipes of the first straight pipe section, the second straight pipe section, the elbow section, the three-way section and the different-diameter section are connected to form a jacket sleeve inner pipe, the jackets of the first straight pipe section, the second straight pipe section, the elbow section, the three-way section and the different-diameter section are coated and sealed to form a jacket sleeve outer pipe, an interlayer cavity for filling protective gas is formed between the jacket sleeve inner pipe and the jacket sleeve outer pipe, a closed space with oxygen is prevented from being formed, and the sealing detection device is used for detecting the tightness of the cavity. The jacketed pipe disclosed by the invention adopts the outer pipe to protect the inner pipe and prevent the outer environment from damaging the inner pipe, and can detect the tightness of the interlayer cavity in real time through the sealing detection device because the outer pipe adopts a coating and sealing connection mode so as to ensure the tightness and safety of the inner pipe.
In addition, the outer pipe of the jacketed pipe can not limit the connection mode of the inner pipe of the jacketed pipe and the installation length of the jacketed pipe, so that the jacketed pipe can be applied to different gas conveying structures, and is more convenient to install and maintain; meanwhile, the interlayer cavity of the jacketed pipe is filled with the protective gas, so that the jacket pipe can be prevented from forming an oxygen-containing closed space, and the safety of fuel gas transmission is influenced.
The invention not only provides a jacket pipe, but also provides an inner pipe/outer pipe of the jacket pipe, which can be made of steel or PE materials and is suitable for different arrangement positions and scenes, for example, the inner pipe/outer pipe is made of steel and can be suitable for the scenes of the safe space or insufficient buried depth of overhead and buried steel pipelines, the inner pipe is made of PE materials, the outer pipe is made of steel and is only suitable for the scenes of the safe space or insufficient buried depth of the buried PE pipelines, and the inner pipe is made of PE or PVC and is only suitable for the scenes of the safe space or insufficient buried depth of the buried PE pipelines and power pipelines.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of this disclosure unless such concepts are mutually inconsistent.
The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of specific embodiments in accordance with the teachings of the present invention.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a longitudinal schematic view of a jacketed pipe of the present invention;
FIG. 2 is a schematic longitudinal cut through a first straight section of the jacketed pipe;
FIG. 3 is a longitudinal cut view of the connection of the elbow section and the first straight section of the jacketed pipe;
FIG. 4 is a longitudinal cut view of the three-way section of the jacketed pipe and the first straight pipe section;
FIG. 5 is a longitudinal cut view of the jacket sleeve different diameter section connecting the first straight pipe section and the second straight pipe section;
FIG. 6 is a schematic view of a jacket sleeve seal detection apparatus;
fig. 7 is a schematic view of a first positioning plate.
In the figure, the specific meaning of each mark is:
1-a first straight pipe section, 1.1-a first inner pipe, 1.2-a first sleeve, 1.3-a first positioning plate, 2-a second straight pipe section, 2.1-a second inner pipe, 2.2-a second sleeve, 2.3-a second positioning plate, 3-an elbow section, 3.1-an elbow inner pipe, 3.2-an elbow sleeve, 3.3-an elbow rib plate, 4-a tee section, 4.1-a tee inner pipe, 4.2-a tee sleeve, 4.3-a tee rib plate, 5-a different diameter section, 5.1-a different diameter inner pipe, 5.2-a different diameter sleeve, 5.3-a different diameter rib plate, 6-a sealed detection device, 6.1-a sealed detection pipeline, 6.2-a ball valve, 6.3-a pressure gauge, 7-a plug and 8-gas equipment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Similarly, the singular forms "a," "an," or "the" do not denote a limitation of quantity, but rather denote the presence of at least one, unless the context clearly dictates otherwise. The terms "comprises," "comprising," or the like, mean that the elements or items listed before "comprises" or "comprising" encompass the features, integers, steps, operations, elements, and/or components listed after "comprising" or "comprising," and do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships may also be changed accordingly.
The protection device for the gas conveying pipeline based on the prior art comprises a pipeline well, a pipe trench and a jacket pipe which are dug professionally, wherein the pipeline well and the pipe trench need professional personnel for construction, manpower and material resources are consumed, the construction period is long, and the maintenance is inconvenient; the jacketed pipe is convenient to use, but the inner pipe cannot be provided with a welding seam, so that the length of the sleeved pipe section is limited, only the length of one pipeline can be protected, and the practical application of the jacketed pipe is narrow. The invention aims to provide a jacketed pipe for a gas pipeline and a gas system, which can be specially used for gas delivery, do not limit the application length of the jacketed pipe, and are convenient to use and maintain.
The present invention will be described in more detail with reference to the embodiments shown in the drawings.
Referring to fig. 1 and 7, the jacket sleeve for a gas pipeline disclosed by the invention comprises a first straight pipe section 1, a second straight pipe section 2, an elbow section 3 for connecting the two first straight pipe sections 1, a tee section 4 arranged on the first straight pipe section 1, a reducing section 5 and a sealing detection device 6; the first straight pipe section 1 comprises a first inner pipe 1.1, a first sleeve 1.2 and a plurality of first positioning plates 1.3, wherein the first sleeve 1.2 is sleeved outside the first inner pipe 1.1, and two axial ends of the first inner pipe 1.1 respectively protrude out of two axial ends of the first sleeve 1.2; evenly be provided with a plurality of first through-holes on the first locating plate 1.3 face, the cover that first locating plate 1.3 interval is even is established at first inner tube 1.1 outer wall, first locating plate 1.3 internal diameter adaptation in first inner tube 1.1 external diameter, first locating plate 1.3 external diameter adaptation in first sleeve 1.2 internal diameter. The second straight pipe section 2 comprises a second inner pipe 2.1, a second sleeve 2.2 sleeved outside the second inner pipe 2.1 and a plurality of second positioning plates 2.3, and two axial ends of the second inner pipe 2.1 respectively protrude out of two axial ends of the second sleeve 2.2; a plurality of second through holes are uniformly formed in the surface of the second positioning plate 2.3, the second positioning plate 2.3 is sleeved on the outer wall of the second inner tube 2.1 at uniform intervals, and the inner diameter of the second positioning plate 2.3 is adaptive to the outer diameter of the second inner tube 2.1 and the outer diameter of the second positioning plate 2.3 is adaptive to the inner diameter of the second sleeve 2.2.
With reference to the embodiment shown in fig. 2, the length of the first inner tube 1.1 protruding from the end of the first sleeve 1.2 at either axial end is not less than the tube diameter of the first inner tube 1.1, and the length of the second inner tube 2.1 protruding from the end of the second sleeve 2.2 at either axial end is not less than the tube diameter of the second inner tube 2.1; defining the tube diameter of the first inner tube 1.1 in the first straight tube section 1 to be D1, the tube diameter of the second inner tube 2.1 in the second straight tube section 2 to be D2, the distance between the first positioning plate 1.3 adjacent to the end of the first sleeve 1.2 in the first straight tube section 1 and the end of the first sleeve 1.2 to be D3, and the distance between the second positioning plate 2.3 adjacent to the end of the second sleeve 2.2 in the second straight tube section 2 and the end of the second sleeve 2.2 to be D4, in order to ensure the supporting effect of the first positioning plate 1.3 or the second positioning plate 2.3, D3 is 0.5D1, and D4 is 0.5D 2.
Referring to fig. 3, the elbow section 3 includes an elbow inner tube 3.1 and an elbow casing 3.2 sleeved outside the elbow inner tube 3.1, wherein two ends of the elbow inner tube 3.1 are respectively connected to the end portions of the first inner tubes 1.1 of the two first straight tube sections 1, and the tube diameter of the elbow inner tube 3.1 is equal to the tube diameter of the first inner tube 1.1; the end part of the elbow casing 3.2 is sleeved outside the elbow inner pipe 3.1, the end parts of the two ends of the elbow casing 3.2 respectively extend to the end part of one side of the first casing 1.2 of the two sections of the first straight pipe sections 2, the end part of the elbow casing 3.2 is wrapped on the outer wall of the first casing 1.2, and a first sealing layer is arranged between the end part of the elbow casing 3.2 and the wrapping position of the outer wall of the first casing 1.2.
As shown in fig. 4, the three-way section 4 includes a three-way inner tube 4.1 and a three-way sleeve 4.2 sleeved outside the three-way inner tube 4.1, three-end openings of the three-way inner tube 4.1 are respectively connected to one side end of the first inner tube 1.1 of the three-way first straight tube section 1, the three-way sleeve 4.2 is sleeved outside the three-way inner tube 4.1, three-end openings of the three-way sleeve 4.2 respectively extend to one side end of the first sleeve 1.2 of the three-way first straight tube section 1, an end portion of the three-way sleeve 4.2 is wrapped on an outer wall of the first sleeve 1.2, and a second sealing layer is disposed between an end of the three-way sleeve 4..
In the specific implementation process, the three-end opening of the three-way section 4 can customize different pipe diameters according to the requirements of the implementation scene, and is matched and connected with the straight pipe sections with different pipe diameters. In the embodiment shown in fig. 4, the two end openings in the uniform straight line have the same pipe diameter, and the third end opening perpendicular to the uniform straight line has a smaller pipe diameter.
As shown in fig. 5, the reducing section 5 is used for connecting the first straight pipe section 1 and the second straight pipe section 2, and includes a reducing inner pipe 5.1 and a reducing sleeve 5.2 sleeved outside the reducing inner pipe 5.1, wherein the reducing sleeve 5.2 includes a first sleeve adapted to the pipe diameter of the first sleeve 1.2, a second sleeve adapted to the pipe diameter of the second sleeve 2.2, and a third sleeve for connecting the first sleeve and the second sleeve, the first sleeve extends to an end of one side of the first sleeve 1.2, an end of the first sleeve is partially covered on an outer wall of the first sleeve 1.2, and a third sealing layer is disposed between an end of the first sleeve and a covered position of the outer wall of the first sleeve 1.2; the second section of sleeve extends to the end part of one side of the second sleeve 2.2, the end part of the second section of sleeve is partially coated on the outer wall of the second sleeve 2.2, and a fourth sealing layer is arranged between the end part of the second section of sleeve and the coating position of the outer wall of the second sleeve 2.2; the reducing inner pipe 5.1 is adapted to the third section of the sleeve, and two ends of the reducing inner pipe 5.1 are respectively connected to the first inner pipe 1.1 and the second inner pipe 1.2. As shown in fig. 5, the reducing inner tube 5.1 and the third section of casing are both truncated cones with openings at both ends.
The first inner pipe 1.1, the second inner pipe 2.1, the elbow inner pipe 3.1, the tee joint inner pipe 4.1 and the reducing inner pipe 5.1 form a jacketed pipe inner pipe, the first jacketed pipe 1.2, the second jacketed pipe 2.2, the elbow jacketed pipe 3.2, the tee joint jacketed pipe 4.2 and the reducing jacketed pipe 5.2 form a jacketed pipe outer pipe, an interlayer cavity is formed between the jacketed pipe inner pipe and the jacketed pipe outer pipe, and positive pressure inert gas is filled in the interlayer cavity; when the oxygen-containing closed space is used in a specific implementation mode, the interlayer cavity is filled with nitrogen until the interlayer cavity is in a micro-positive pressure state, so that the oxygen-containing closed space does not exist in the interlayer cavity.
In the above embodiment, in order to ensure the stability of the cladding connection between the outer pipes of the jacket pipe, the matching length of the elbow casing pipe 3.2, the three-way casing pipe 4.2 and the outer wall of the first casing pipe 1.2 along the axial direction is not less than the outer diameter of the first inner pipe 1.1. In a similar way, the matching length of the reducing sleeve 5.2 and the outer wall of the first sleeve 1.2 along the axial direction is not less than the outer diameter of the first inner pipe 1.1, and the matching length of the reducing sleeve and the outer wall of the second sleeve 2.2 along the axial direction is not less than the outer diameter of the second inner pipe 2.1.
In fig. 1, a seal detection device 6 is arranged on the jacketed pipe for detecting the tightness of the interlayer cavity. Fig. 6 shows a structure of the sealing detection device 6, which includes a sealing detection pipeline 6.1 communicated with the interlayer cavity from the outer wall of the outer pipe of the self-clamping sleeve, a ball valve 6.2 arranged on the sealing detection pipeline 6.1, and a pressure gauge 6.3 arranged on the side of the ball valve 6.2 far away from the clamping sleeve, wherein the ball valve 6.2 is in a normally closed state; when the sealing effect of the inner pipe of the jacketed pipe needs to be judged through pressure measurement, the ball valve 6.2 can be adjusted to be in a normally open state, and the current internal pressure of the interlayer cavity is displayed through the pressure gauge 6.3; for example, if the value of the pressure gauge 6.3 keeps the positive pressure value of the initially filled inert gas, the jacketed pipe is not leaked and is safe; if the value of the pressure gauge 6.3 is unchanged, the pressure is the same as the external atmospheric pressure, and the outer pipe of the jacketed pipe leaks; if the value of the pressure gauge 6.3 is equal to the gas pressure of the way, the leakage of the inner pipe of the jacketed pipe is indicated.
In the coating structures in the embodiments shown in fig. 2 to 5, the first sealing layer, the second sealing layer, the third sealing layer and the fourth sealing layer all directly adopt a tetrafluoro gasket as a sealing layer, and the thickness of the tetrafluoro gasket is 2.5 mm.
In order to ensure the stability of the interconnection between the outer pipes of the jacket pipe, in the embodiment shown in fig. 3 to 5, the elbow sleeve 3.2, the three-way sleeve 4.2 and the reducing sleeve 5.2 are all arranged into a cylindrical structure formed by splicing two semicylinders, and rib plates extending outwards along the radial direction of the opening of the semicylinders, such as an elbow rib plate 3.3, a three-way rib plate 4.3 and a reducing rib plate 5.3, are respectively arranged on two sides of the opening of the semicylinder, and are used for being fixedly connected when the two semicylinders are spliced to form a sealing and fixing structure similar to a hoop. In order to ensure the sealing effect between the two corresponding spliced semi-cylindrical ribbed plates, a sealing gasket is arranged between the matching joints. The first sleeve 1.2 and the second sleeve 2.2 are located on the straight pipe section, so that finished pipelines can be directly selected, and the diameters of the pipelines are larger than those of the internal pipelines.
The two ends of the jacketed pipe shown in figure 1 of the invention in the length direction are respectively provided with a plug 7, and the plugs 7 are used for sealing the interlayer cavity; as shown in fig. 6, the plug 7 is configured as a step structure formed by coaxially arranging two sections of reducing cylinders; defining a small-diameter cylinder in a step structure as a first cylinder and a large-diameter cylinder as a second cylinder, wherein the first cylinder is sleeved on the outer wall of the inner pipe of the jacket pipe in a sealing manner, and the second cylinder is sleeved on the outer wall of the outer pipe of the jacket pipe in a sealing manner; the sealing structure for realizing the sealing sleeve can be a tetrafluoro gasket. In addition, in order to ensure the stable effect of plugging installation, the outer diameter of the inner pipe of the jacket pipe at the installation end of the plug 7 on the jacket pipe is defined as D5, and the outer diameter of the outer pipe of the jacket pipe is defined as D6, so that the matching length of the first cylinder and the outer wall of the inner pipe of the jacket pipe along the axial direction is not more than D5-30mm, the matching length of the second cylinder and the outer wall of the outer pipe of the jacket pipe along the axial direction is not less than D6, and the 30mm unmatched length of the end part of the inner pipe of. It should be noted that the tetrafluoro gasket is only one sealing structure indicated by the present invention, and the sealing layer or the sealing structure provided by the present invention is not limited to sealing gaskets made of other materials or other methods for achieving sealing.
The jacketed pipe disclosed by the invention is a series of jacketed pipes with the structure, is not limited to the structure, and also comprises an inner pipe material and an outer pipe material, namely, the application scene of the jacketed pipe when the materials of the inner pipe and the outer pipe of the jacketed pipe are different is pointed out.
In some embodiments, the inner pipe and the outer pipe of the jacket pipe are made of steel, and at the moment, a first inner pipe 1.1, an elbow inner pipe 3.1, a tee inner pipe 4.1, a reducing inner pipe 5.1 and a second inner pipe 2.1 which form the inner pipe of the jacket pipe are welded; the all-steel jacketed pipe is suitable for overhead transportation during gas transportation, and is also suitable for application scenes with insufficient safe spacing or buried depth of buried steel pipelines; when the material of the inner pipe of the jacketed pipe is PE, and the material of the outer pipe of the jacketed pipe is PE or PVC and other insulating materials, the first inner pipe 1.1, the elbow inner pipe 3.1, the tee inner pipe 4.1, the reducing inner pipe 5.1 and the second inner pipe 2.1 which form the inner pipe of the jacketed pipe are in hot-melt connection or electric-melt welding; the full-insulation material jacketed pipe is only suitable for the application scene of the safe distance between the buried PE pipeline and the power pipeline during gas transmission; the material of double-layered sleeve pipe inner tube is the steel, and the material of double-layered sleeve pipe outer tube is insulating materials such as PE or PVC, welds between the intraductal intertube of double-layered sleeve, and this double-layered sleeve pipe is applicable to when not enough with power line safety interval. The sleeve pipe cannot be used for overhead when the sleeve pipe is made of materials which are not suitable for overhead, such as PE. The material of jacketed pipe inner tube is PE, and jacketed pipe outer tube is the steel, melts between the jacketed pipe inner tube and connects or the electric fusion welding, and this jacketed pipe only is applicable to buried PE pipeline safe interval or the not enough application scene of buried depth when the gas is carried.
The invention also provides a gas system, which adopts the jacket sleeve for the gas pipeline to carry out gas transmission, different types of jacket sleeves can be selected according to the requirements of application scenes when the pipeline is erected, the construction and later-stage overhaul and maintenance are convenient, the gas system can be used for a long distance, and the gas transmission is safe and reliable.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (10)
1. A jacket sleeve for a gas pipeline is characterized by comprising a first straight pipe section, a second straight pipe section, an elbow section for connecting the two first straight pipe sections, a three-way section, a different-diameter section and a sealing detection device, wherein the three-way section, the different-diameter section and the sealing detection device are arranged on the first straight pipe section;
the first straight pipe section comprises a first inner pipe, a first sleeve and a plurality of first positioning plates, wherein the first sleeve is sleeved outside the first inner pipe, and two axial ends of the first inner pipe respectively protrude out of two axial ends of the first sleeve; a plurality of first through holes are uniformly formed in the surface of the first positioning plate, the first positioning plate is sleeved on the outer wall of the first inner pipe at uniform intervals, the inner diameter of the first positioning plate is adaptive to the outer diameter of the first inner pipe, and the outer diameter of the first positioning plate is adaptive to the inner diameter of the first sleeve;
the second straight pipe section comprises a second inner pipe, a second sleeve and a plurality of second positioning plates, wherein the second sleeve is sleeved outside the second inner pipe, and two axial ends of the second inner pipe respectively protrude out of two axial ends of the second sleeve; a plurality of second through holes are uniformly formed in the surface of the second positioning plate, the second positioning plates are uniformly sleeved on the outer wall of the second inner pipe at intervals, the inner diameter of each second positioning plate is matched with the outer diameter of the second inner pipe, and the outer diameter of each second positioning plate is matched with the inner diameter of the second sleeve;
the elbow section comprises an elbow inner pipe and an elbow sleeve pipe sleeved outside the elbow inner pipe, two ends of the elbow inner pipe are respectively connected to the end parts of the first inner pipes of the two sections of first straight pipe sections, and the pipe diameter of the elbow inner pipe is equal to that of the first inner pipe; the end part of the elbow sleeve is sleeved outside the elbow inner pipe, the end parts of the two ends of the elbow sleeve respectively extend to the end part of one side of the first sleeve of the two sections of the first straight pipe sections, the end part of the elbow sleeve is partially coated on the outer wall of the first sleeve, and a first sealing layer is arranged between the end part of the elbow sleeve and the coating position of the outer wall of the first sleeve;
the three-way section comprises a three-way inner pipe and a three-way sleeve sleeved on the outer side of the three-way inner pipe, three-end openings of the three-way inner pipe are respectively connected to one side end part of a first inner pipe of the three first straight pipe sections, the three-way sleeve is sleeved on the outer side of the three-way inner pipe, the three-end openings of the three-way sleeve respectively extend to one side end part of the first sleeve of the three first straight pipe sections, the end part of the three-way sleeve is partially wrapped on the outer wall of the first sleeve, and a second sealing layer is arranged between the end part;
the reducing section is used for connecting the first straight pipe section and the second straight pipe section and comprises a reducing inner pipe and a reducing sleeve sleeved outside the reducing inner pipe; the reducing sleeve comprises a first section of sleeve matched with the pipe diameter of the first sleeve, a second section of sleeve matched with the pipe diameter of the second sleeve and a third section of sleeve used for connecting the first section of sleeve and the second section of sleeve, wherein the first section of sleeve extends to the end part of one side of the first sleeve, the end part of the first section of sleeve is partially coated on the outer wall of the first sleeve, and a third sealing layer is arranged between the end part of the first section of sleeve and the coating position of the outer wall of the first sleeve; the second section of sleeve extends to the end part of one side of the second sleeve, the end part of the second section of sleeve is partially coated on the outer wall of the second sleeve, and a fourth sealing layer is arranged between the end part of the second section of sleeve and the coating position of the outer wall of the second sleeve; the reducing inner pipe is adapted to the third section of sleeve, and two ends of the reducing inner pipe are respectively connected to the first inner pipe and the second inner pipe;
the first inner pipe, the second inner pipe, the elbow inner pipe, the tee joint inner pipe and the reducing inner pipe form a jacketed pipe inner pipe, the first sleeve, the second sleeve, the elbow sleeve, the tee joint sleeve and the reducing sleeve form a jacketed pipe outer pipe, an interlayer cavity is formed between the jacketed pipe inner pipe and the jacketed pipe outer pipe, and positive pressure inert gas is filled in the interlayer cavity;
the sealing detection device is arranged on the jacketed pipe and used for detecting the airtightness of the interlayer cavity.
2. The jacket sleeve for a gas pipeline as claimed in claim 1, wherein the elbow sleeve, the three-way sleeve and the reducing sleeve are all arranged into a cylindrical structure formed by splicing two semi-cylinders; the two sides of the opening of the semi-cylinders are respectively provided with a ribbed plate which extends outwards along the radial direction of the semi-cylinders, and the ribbed plates are used for being fixedly connected when the two semi-cylinders are spliced.
3. The jacket sleeve for a gas pipeline as claimed in claim 1, wherein the first inner pipe projects from the end of the first sleeve at either axial end thereof by a length not less than the diameter of the first inner pipe, and the second inner pipe projects from the end of the second sleeve at either axial end thereof by a length not less than the diameter of the second inner pipe;
the pipe diameter of a first inner pipe in the first straight pipe section is defined as D1, the pipe diameter of a second inner pipe in the second straight pipe section is defined as D2, the distance between a first positioning plate adjacent to the end part of the first sleeve in the first straight pipe section and the end part of the first sleeve is defined as D3, the distance between a second positioning plate adjacent to the end part of the second sleeve in the second straight pipe section and the end part of the second sleeve is defined as D4, D3 is 0.5D1, and D4 is 0.5D 2.
4. The jacket pipe for a gas pipeline according to claim 1, wherein plugs are respectively arranged at two ends of the jacket pipe in the length direction, and the plugs are used for sealing the interlayer cavity;
the plug is of a step structure which is coaxially arranged by two sections of reducing cylinders;
and defining the small-diameter cylinder in the step structure as a first cylinder and the large-diameter cylinder as a second cylinder, wherein the first cylinder is sleeved on the outer wall of the inner pipe of the jacket pipe in a sealing manner, and the second cylinder is sleeved on the outer wall of the outer pipe of the jacket pipe in a sealing manner.
5. The jacket sleeve for a gas pipeline as claimed in claim 4, wherein the inner jacket sleeve pipe and the outer jacket sleeve pipe are both made of steel;
or the material of the inner pipe of the jacketed pipe is steel, and the material of the outer pipe of the jacketed pipe is PE or PVC;
or the material of the inner pipe of the jacketed pipe is PE, and the material of the outer pipe of the jacketed pipe is steel;
or the material of the inner pipe of the jacketed pipe is PE, and the material of the outer pipe of the jacketed pipe is PE or PVC.
6. The jacket sleeve for a gas pipeline according to claim 5, wherein when the inner pipe of the jacket sleeve is made of steel, the first inner pipe, the elbow inner pipe, the tee inner pipe, the reducing inner pipe and the second inner pipe are welded;
and when the inner pipe of the jacket pipe is made of PE, the first inner pipe, the elbow inner pipe, the tee joint inner pipe, the reducing inner pipe and the second inner pipe are in hot melting connection or electric melting welding.
7. The jacket sleeve for a gas pipeline as claimed in claim 4, wherein the outer diameter of the inner pipe of the jacket sleeve at the plug mounting end of the jacket sleeve is defined as D5, and the outer diameter of the outer pipe of the jacket sleeve is defined as D6, so that the matching length of the first cylinder and the outer wall of the inner pipe of the jacket sleeve along the axial direction is not more than D5-30mm, and the matching length of the second cylinder and the outer wall of the outer pipe of the jacket sleeve along the axial direction is not less than D6.
8. The clamping sleeve for the gas pipeline as recited in claim 4, wherein the sealing detection device comprises a sealing detection pipeline communicated with the interlayer cavity from the outer wall of the outer pipe of the clamping sleeve, a ball valve arranged on the sealing detection pipeline and a pressure gauge arranged on the side of the ball valve far away from the clamping sleeve; the ball valve is in a normally closed state.
9. The jacket sleeve for a gas pipeline as claimed in claim 1, wherein the fitting length of the elbow sleeve, the tee sleeve and the outer wall of the first sleeve in the axial direction is not less than the outer diameter of the first inner pipe.
10. A gas system comprising a jacket sleeve for a gas pipeline according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011560823.1A CN112856229B (en) | 2020-12-25 | 2020-12-25 | Jacket pipe for gas pipeline and gas system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011560823.1A CN112856229B (en) | 2020-12-25 | 2020-12-25 | Jacket pipe for gas pipeline and gas system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112856229A true CN112856229A (en) | 2021-05-28 |
| CN112856229B CN112856229B (en) | 2024-04-09 |
Family
ID=75996939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011560823.1A Active CN112856229B (en) | 2020-12-25 | 2020-12-25 | Jacket pipe for gas pipeline and gas system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112856229B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116877933A (en) * | 2023-07-25 | 2023-10-13 | 武汉市燃气集团有限公司 | Gas pipe network fault information monitoring and early warning system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6032699A (en) * | 1997-05-19 | 2000-03-07 | Furon Company | Fluid delivery pipe with leak detection |
| CN102758973A (en) * | 2012-07-17 | 2012-10-31 | 东北石油大学 | Dual-layer pipe wall composite-type gas pipeline and leakage monitoring method |
| CN106195467A (en) * | 2016-08-12 | 2016-12-07 | 招商局重工（江苏）有限公司 | A kind of simple, monoblock type double-wall pipe |
| CN210716349U (en) * | 2019-07-15 | 2020-06-09 | 亚达管道***股份有限公司 | Inflatable positive pressure inerting gas double-wall pipe |
-
2020
- 2020-12-25 CN CN202011560823.1A patent/CN112856229B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6032699A (en) * | 1997-05-19 | 2000-03-07 | Furon Company | Fluid delivery pipe with leak detection |
| CN102758973A (en) * | 2012-07-17 | 2012-10-31 | 东北石油大学 | Dual-layer pipe wall composite-type gas pipeline and leakage monitoring method |
| CN106195467A (en) * | 2016-08-12 | 2016-12-07 | 招商局重工（江苏）有限公司 | A kind of simple, monoblock type double-wall pipe |
| CN210716349U (en) * | 2019-07-15 | 2020-06-09 | 亚达管道***股份有限公司 | Inflatable positive pressure inerting gas double-wall pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116877933A (en) * | 2023-07-25 | 2023-10-13 | 武汉市燃气集团有限公司 | Gas pipe network fault information monitoring and early warning system and method |
| CN116877933B (en) * | 2023-07-25 | 2024-01-19 | 武汉市燃气集团有限公司 | Gas pipe network fault information monitoring and early warning system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112856229B (en) | 2024-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5176025A (en) | Pipeline secondary containment system and method | |
| US7960978B2 (en) | Method for providing leak detection in pre-insulated piping | |
| US3801140A (en) | Pre-insulated pipe conduit with test passage | |
| US20190242518A1 (en) | System and method for protecting one or more pipes against corrosion and corrosion-protected pipe | |
| CN112134245A (en) | Underground cable leakage protection early warning device and using method | |
| CN112856229A (en) | Gas is jacket pipe and gas system for pipeline | |
| RU2712322C2 (en) | Method of connecting sections of lined pipeline, section of lined pipeline and method of laying pipeline on sea bottom | |
| US20090097910A1 (en) | Coupling construction for high-pressure pipe | |
| CN112165055B (en) | Cable cabin-penetrating protection device and manufacturing method | |
| KR20090003898A (en) | Gas leak pipe mounting structure for casing of underground laying gas pipe | |
| CN205877597U (en) | Tip sealing connecting piece and direct -burried type heat - supply pipeline of insulating tube | |
| CN112987210A (en) | Sensing optical fiber unit structure for pipeline risk monitoring and early warning and construction method | |
| JP2004085372A (en) | Double pipe system | |
| FR2712065A1 (en) | Method and device for transporting liquid hydrocarbons including the production of a double-walled pipeline with a remote sealing-detection device | |
| EP2096347B1 (en) | Method for joining together steel pipes for conveying fluids under pressure | |
| BR112019008651B1 (en) | METHOD OF ASSEMBLYING TWO DUCTS OF THERMOPLASTIC MATERIALS AND PROCESS FOR CONNECTING TWO UNIT ELEMENTS OF A FLUID TRANSPORT PIPE | |
| SE506523C2 (en) | Thermally insulated piping system, method for laying the pipes and device for connecting the pipes | |
| KR20170031876A (en) | Method for constru cting repair of connection in double insulation pipe using outer jacket | |
| RU218677U1 (en) | Node for connecting sections of a locally damaged cryogenic pipeline of a superconducting cable line | |
| CN212361077U (en) | High leakproofness direct-burried insulating tube | |
| CN210372350U (en) | Direct-buried heat-insulation reducer pipe fitting | |
| CN219493880U (en) | Buried hydrogen conveying pipeline detection device | |
| JP3151138B2 (en) | Corrosion protection method for anti-corrosion coated steel pipe joints | |
| RU218651U1 (en) | Unit for connecting sections of a flexible cryogenic pipeline | |
| CN218914223U (en) | Maintenance-free prefabricated heat preservation device for directly-buried sleeve compensator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |