CN110726036A - Novel gas pipeline joint coating corrosion degree detection device and method - Google Patents
Novel gas pipeline joint coating corrosion degree detection device and method Download PDFInfo
- Publication number
- CN110726036A CN110726036A CN201911097996.1A CN201911097996A CN110726036A CN 110726036 A CN110726036 A CN 110726036A CN 201911097996 A CN201911097996 A CN 201911097996A CN 110726036 A CN110726036 A CN 110726036A
- Authority
- CN
- China
- Prior art keywords
- main body
- connecting flange
- pipeline
- inner pipe
- outer side
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe
- F16L58/1027—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe the coating being a sprayed layer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
Abstract
The invention discloses novel equipment and a method for detecting the corrosion degree of a joint coating of a gas pipeline, and the equipment comprises a pipeline main body, a first connecting flange, an inner pipe main body and a second connecting flange, wherein the first connecting flange and the second connecting flange are respectively and fixedly arranged at two ends of the pipeline main body, the inner pipe main body is fixedly arranged in the pipeline main body through an annular supporting seat, a connecting raised head is fixedly connected to the outer side of one end of the inner pipe main body, which extends out of the second connecting flange, and a connecting groove is arranged in the central position of the first connecting flange at the position of the inner pipe main body. This novel gas pipeline joint coating degree of corrosion's check out test set and method make the gas pipeline more comprehensive at the testing process of supersound guided wave through the probe lantern ring that sets up and the matrix installation of transducer, and the detection length of supersound guided wave wound mode is more outstanding simultaneously, has avoided because the unreasonable condition that leads to neglecting pipeline or pipeline joint coating emergence corruption of testing and analysis.
Description
Technical Field
The invention relates to the technical field of gas pipelines, in particular to novel equipment and a method for detecting corrosion degree of a repaired mouth of a gas pipeline.
Background
The gas pipeline refers to a pipeline for conveying natural gas (including associated gas produced in oil fields) from a mining place or a processing plant to an urban gas distribution center or an industrial enterprise user, which is also called a gas pipeline, the natural gas is conveyed by using the gas pipeline, which is a way of conveying a large amount of natural gas on land, the gas pipeline occupies about half of the total length of the pipeline in the world, the long-distance gas pipeline is generally conveyed by pressurizing a gas compressor, the gas pipeline is rapidly developed in the aspects of selecting and selecting pipes, improving the conveying efficiency, realizing the full-line automation and the like, the pipes are widely made of X-60 low alloy steel (with the degree limit of 41,160 Pa), the pipes are made of materials with higher strength such as X-65, X-70 and the like, in order to reduce the friction resistance in the pipeline, new steel pipes with the thickness of more than 426 mm have generally adopted an inner coating, in addition, gases with different physical properties are conveyed, and a gaseous and liquid fuel gas pipeline conveying test at a low temperature of-70 ℃ and a high pressure of 75,460 Pa, although the fuel gas pipeline conveying has the advantages of low conveying cost, small occupied area, high safety performance and the like, compared with the integral structure of the pipeline, the repaired mouth of the fuel gas pipeline is more easily corroded, and in order to avoid the occurrence of the corresponding corrosion condition of the pipeline and ensure the safety of the fuel gas conveying, a novel device and a method for detecting the corrosion degree of the repaired mouth of the fuel gas pipeline are provided.
Disclosure of Invention
The invention aims to provide novel equipment and a method for detecting the corrosion degree of a repaired mouth of a gas pipeline, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a novel gas pipeline repaired mouth corrosion degree detection device and a method thereof comprise a pipeline main body, a first connecting flange, an inner pipe main body and a second connecting flange, wherein the first connecting flange and the second connecting flange are respectively and fixedly arranged at two ends of the pipeline main body, the inner pipe main body is fixedly arranged in the pipeline main body through an annular supporting seat, a protective inner layer is uniformly sprayed on the inner wall of the inner pipe main body, a probe lantern ring is fixedly arranged on the inner side of the pipeline main body at equal intervals, transducers are uniformly arranged on the outer side of the probe lantern ring, one end of the inner pipe main body extends out of the outer side of the second connecting flange and is fixedly connected with a connecting raised head, the transducers are fixedly arranged on the outer side of the inner pipe main body of the connecting raised head, one end of the inner pipe main body, far away from the second connecting flange, extends into the inner side of the first connecting flange, a connecting groove is arranged at the central position of, the connecting groove and the connecting raised head are matched with each other for use, the outer side of the pipeline main body is provided with a protective outer layer, the first connecting flange and the second connecting flange are fixedly connected with each other through a fixing nut and a fixing bolt which are matched with each other for use, connectors are fixedly mounted at the opposite sides of the first connecting flange and the second connecting flange and at the positions between the fixing nut and the fixing bolt, and the connectors and the energy converter are matched with each other for use.
Preferably, a rubber sealing gasket is fixedly installed at the joint between the first connecting flange and the second connecting flange.
Preferably, the inner wall of the connecting groove is uniformly adhered with a sealing gasket.
Preferably, a sealing rubber ring is fixedly arranged between the fixing nut and the fixing bolt and between the first connecting flange and the second connecting flange.
Preferably, the pipeline main body, the first connecting flange, the inner pipe main body and the second connecting flange are internally provided with conducting wires which extend to the outer side of the pipeline main body.
Preferably, the protective inner layer is a protective layer formed by electrostatic spraying of epoxy resin powder.
Preferably, the outer side of the pipeline body is cleaned, epoxy powder is sprayed on the outer side of the pipeline body by static electricity to form a uniformly distributed coating, the thickness of the epoxy resin coating is controlled to be 150-200 mu m, an adhesive is uniformly coated on the outer side of the epoxy resin coating, polyethylene in a viscous state is wound on the outer side of the adhesive in a side direction, and the polyethylene is rolled to be tightly adhered to the adhesive layer.
Preferably, the method for drying the interior of the gas pipeline comprises a pipeline main body, an inner pipe main body and liquid nitrogen, wherein the liquid nitrogen is vaporized through a vaporizer, heated through a heater and then enters the interior of the inner pipe main body for low-pressure intermittent purging, so that water molecules in the interior of the inner pipe main body are mixed with the dry nitrogen and then are taken out of the pipeline main body.
Preferably, the temperature of the nitrogen gas heated by the heater is not lower than 50 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1. the array installation of the probe lantern ring and the transducer enables the detection process of the gas pipeline in the ultrasonic guided wave to be more comprehensive, meanwhile, the detection length of the ultrasonic guided wave damage detection mode is more excellent, the damage detection analysis effect is better, and the condition that the pipeline is ignored or the pipeline repaired mouth is corroded due to unreasonable detection analysis is avoided;
2. the double-layer pipeline design of pipeline main part and inner tube main part has effectively avoided the gas pipeline to take place the condition of leaking in long distance transportation gas in-process, even the gas takes place to leak in the inside of inner tube main part and pipeline main part carries out sealed protection to the gas in addition, has reduced the risk that the incident takes place, has effectively utilized the gas resource simultaneously, has avoided the extravagant phenomenon of the energy.
Drawings
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a schematic view of a partial structure of the present invention;
FIG. 3 is an overall cross-sectional structural view of the present invention;
fig. 4 is a schematic structural view of the connecting flange of the present invention.
In the figure: 1. a pipe body; 2. a first connecting flange; 3. fixing a nut; 4. an inner tube body; 5. a transducer; 6. an annular supporting seat; 7. fixing the bolt; 8. a second connecting flange; 9. a probe collar; 10. sealing gaskets; 11. a rubber sealing gasket; 12. a connecting groove; 13. connecting the raised head; 14. a conductive wire; 15. sealing the rubber ring; 16. an outer protective layer; 17. a protective inner layer; 18. a connector is provided.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a novel gas pipeline repaired mouth corrosion degree detection device and method comprises a pipeline main body 1, a first connecting flange 2, an inner pipe main body 4 and a second connecting flange 8, wherein the first connecting flange 2 and the second connecting flange 8 are respectively and fixedly installed at two ends of the pipeline main body 1, the first connecting flange 2, the second connecting flange 8 and the pipeline main body 1 are installed through welding, the welding surface roughness of the first connecting flange 2, the second connecting flange 8 and the pipeline main body 1 meets the standard requirement, the inner pipe main body 4 is fixedly installed inside the pipeline main body 1 through an annular supporting seat 6, the annular supporting seat 6 enables a certain vacant part to be arranged between the inner pipe main body 4 and the inner wall of the pipeline main body 1, a probe lantern ring 9 is convenient to install, a protective inner layer 17 is uniformly sprayed on the inner wall of the inner pipe main body 4, the spraying mode adopts an electrostatic spraying mode, the protective inner layer 17 is an epoxy resin inner layer, and the friction force between gas and the, the transportation cost in the gas transportation process is reduced, the inner side of the pipeline main body 1 is fixedly provided with probe lantern rings 9 at equal intervals, the outer sides of the probe lantern rings 9 are uniformly provided with transducers 5, the transducers 5 are arranged on the outer sides of the probe lantern rings 9 in a matrix manner, the specific installation number of the transducers 5 is selected according to the outer diameter size of the pipeline main body 1, comprehensive scanning analysis can be carried out on the pipeline main body 1 and the inner pipe main body 4, one end of the inner pipe main body 4 extends out of the outer side of the second connecting flange 8 and is fixedly connected with a connecting raised head 13, the connecting raised head 13 and the second connecting flange 8 are integrally formed, the inner part of the connecting raised head 13 is communicated with the inner pipe main body 4, the transducer 5 is fixedly arranged on the outer side of the inner pipe main body 4 in the inner pipe main body 13, one end of the inner pipe main body 4 far away from the second connecting flange 8 extends to the inner side of the first connecting flange 2, a connecting groove, and the connecting groove 12 and the connecting raised head 13 are matched with each other for use, the outer side of the pipeline main body 1 is provided with a protective outer layer 16, the first connecting flange 2 and the second connecting flange 8 are fixedly connected with the fixing bolt 7 through the fixing nut 3 which is matched with each other for use, the connector 18 is fixedly arranged at the opposite side of the first connecting flange 2 and the second connecting flange 8 and the position between the fixing nut 3 and the fixing bolt 7, the connector 18 enables the integral function of the probe lantern ring 9 to be connected with an external computer, the detection and analysis of the pipeline repaired mouth and the pipeline main body 1 and the inner pipe main body 4 are ensured, and the connector 18 and the transducer 5 are matched with each other for use.
In the invention: a rubber sealing gasket 11 is fixedly arranged at the joint between the first connecting flange 2 and the second connecting flange 8. In the embodiment, the rubber sealing washer 11 makes the friction between the first connecting flange 2 and the second connecting flange 8 larger, and ensures the tightness of the connection between the pipe bodies 1.
In the invention: the inner wall of the connecting groove 12 is uniformly adhered with a sealing gasket 10. In the embodiment, the sealing gasket 10 adhesively mounted on the inner wall of the coupling recess 12 ensures the coupling stability and tightness of the coupling protrusion 13 inside the coupling recess 12, and prevents relative rotation between the pipe bodies 1.
In the invention: and sealing rubber rings 15 are fixedly arranged between the fixing nuts 3 and the fixing bolts 7 and between the first connecting flange 2 and the second connecting flange 8. In the embodiment, the fixing of the rubber packing 15 ensures the connection stability between the fixing nut 3 and the fixing bolt 7 and the first connecting flange 2 and the second connecting flange 8, so that the connection between the pipe main bodies 1 is more excellent.
In the invention: the pipeline main body 1, the first connecting flange 2, the inner pipe main body 4 and the second connecting flange 8 are internally provided with conducting wires 14 which extend to the outside of the pipeline main body 1. In the embodiment, the arrangement of the conducting wire 14 can effectively lead out the micro static electricity generated by the inner tube main body 4 in the gas transportation process, and the safety of the gas in the transportation process is effectively ensured.
In the invention: the protective inner layer 17 is a protective layer formed by electrostatic spraying of epoxy resin powder.
In the invention: a method for manufacturing the outer protective layer 16 includes cleaning the outer side of a pipeline body 1, spraying epoxy powder by static electricity to form a uniformly distributed coating on the outer side of the pipeline body 1, controlling the thickness of the epoxy resin coating to be 150-200 mu m, uniformly coating an adhesive on the outer side of the epoxy resin coating, winding polyethylene in a viscous state on the outer side of the adhesive, and rolling the polyethylene to enable the polyethylene to be tightly adhered to the adhesive layer.
In the invention: a method for drying the interior of a gas pipeline comprises a pipeline main body 1, an inner pipe main body 4 and liquid nitrogen, wherein the liquid nitrogen is vaporized through a vaporizer, heated through a heater and then enters the interior of the inner pipe main body 4 to be subjected to low-pressure intermittent purging, and water molecules in the interior of the inner pipe main body 4 are mixed with the dry nitrogen and then are taken out of the pipeline main body 1.
In the invention: the temperature of the nitrogen heated by the heater is not lower than 50 ℃.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a novel gas pipeline joint coating degree of corrosion's check out test set and method, includes pipeline main part (1), first flange (2), inner tube main part (4) and second flange (8), the both ends of pipeline main part (1) are fixed mounting respectively has first flange (2) and second flange (8), its characterized in that: the inner pipe comprises a pipe body (1), an inner pipe body (4) is fixedly arranged in the pipe body (1) through an annular supporting seat (6), a protective inner layer (17) is uniformly sprayed on the inner wall of the inner pipe body (4), a probe sleeve ring (9) is fixedly arranged on the inner side of the pipe body (1) at equal intervals, a transducer (5) is uniformly arranged on the outer side of the probe sleeve ring (9), one end of the inner pipe body (4) extends out of the outer side of a second connecting flange (8) and is fixedly connected with a connecting raised head (13), the transducer (5) is fixedly arranged on the outer side of the inner pipe body (4) of the connecting raised head (13), one end, far away from the second connecting flange (8), of the inner pipe body (4) extends to the inner side of a first connecting flange (2), a connecting groove (12) is formed in the position of the inner pipe body (4) at the center of, and the connecting groove (12) and the connecting raised head (13) are matched with each other for use, a protective outer layer (16) is arranged on the outer side of the pipeline main body (1), the first connecting flange (2) and the second connecting flange (8) are fixedly connected with the fixing bolt (7) through the fixing nut (3) matched with each other for use, the connector (18) is fixedly installed at the opposite side of the first connecting flange (2) and the second connecting flange (8) and at the position between the fixing nut (3) and the fixing bolt (7), and the connector (18) and the transducer (5) are matched with each other for use.
2. The novel gas pipeline repaired mouth corrosion degree detection device and method according to claim 1 are characterized in that: and a rubber sealing gasket (11) is fixedly arranged at the joint between the first connecting flange (2) and the second connecting flange (8).
3. The novel gas pipeline repaired mouth corrosion degree detection device and method according to claim 1 are characterized in that: and a sealing gasket (10) is uniformly adhered to the inner wall of the connecting groove (12).
4. The novel gas pipeline repaired mouth corrosion degree detection device and method according to claim 1 are characterized in that: and a sealing rubber ring (15) is fixedly arranged between the fixing nut (3) and the fixing bolt (7) and between the first connecting flange (2) and the second connecting flange (8).
5. The novel gas pipeline repaired mouth corrosion degree detection device and method according to claim 1 are characterized in that: the pipeline comprises a pipeline main body (1), a first connecting flange (2), an inner pipe main body (4) and a second connecting flange (8), wherein a conducting wire (14) is arranged inside the pipeline main body (1) and extends to the outer side of the pipeline main body (1).
6. The novel gas pipeline repaired mouth corrosion degree detection device and method according to claim 1 are characterized in that: the protective inner layer (17) is a protective layer formed by electrostatic spraying of epoxy resin powder.
7. A method of making a protective outer layer (16) according to claim 1, wherein: cleaning the outer side of the pipeline main body (1), spraying epoxy powder by static electricity to form a uniformly distributed coating on the outer side of the pipeline main body (1), controlling the thickness of the epoxy resin coating to be between 150 and 200 mu m, uniformly coating an adhesive on the outer side of the epoxy resin coating, winding polyethylene in a viscous state on the outer side of the adhesive, and rolling the polyethylene to enable the polyethylene to be tightly adhered with the adhesive layer.
8. A method for drying the inside of a gas pipeline, comprising a pipeline body (1), an inner pipe body (4) and liquid nitrogen, characterized in that: the liquid nitrogen is vaporized through the vaporizer, heated through the heater and then enters the inner pipe main body (4) to be subjected to low-pressure intermittent blowing, so that water molecules in the inner pipe main body (4) are mixed with dry nitrogen and then are taken out of the pipeline main body (1).
9. A method according to claim 8, characterized by: the temperature of the nitrogen heated by the heater is not lower than 50 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911097996.1A CN110726036A (en) | 2019-11-12 | 2019-11-12 | Novel gas pipeline joint coating corrosion degree detection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911097996.1A CN110726036A (en) | 2019-11-12 | 2019-11-12 | Novel gas pipeline joint coating corrosion degree detection device and method |
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| Publication Number | Publication Date |
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| CN110726036A true CN110726036A (en) | 2020-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911097996.1A Withdrawn CN110726036A (en) | 2019-11-12 | 2019-11-12 | Novel gas pipeline joint coating corrosion degree detection device and method |
Country Status (1)
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| CN (1) | CN110726036A (en) |
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|---|---|---|---|---|
| EP0095818A1 (en) * | 1982-06-02 | 1983-12-07 | Wavin B.V. | A pipe connection comprising two metal outer pipes |
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2019
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|---|---|---|---|---|
| EP0095818A1 (en) * | 1982-06-02 | 1983-12-07 | Wavin B.V. | A pipe connection comprising two metal outer pipes |
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| CN211179652U (en) * | 2019-11-12 | 2020-08-04 | 江苏科盾检测技术有限公司 | Novel gas pipeline joint coating degree of corrosion's check out test set |
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| 邓晓峰等: "天然气管道氮气干燥置换工艺及实际应用", 《石油与天然气化工》 * |
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Application publication date: 20200124 |