CN109783921B - Heat affected zone evaluation method and device for oil and gas conveying pipeline and computer equipment - Google Patents
Heat affected zone evaluation method and device for oil and gas conveying pipeline and computer equipment Download PDFInfo
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- CN109783921B CN109783921B CN201910012731.0A CN201910012731A CN109783921B CN 109783921 B CN109783921 B CN 109783921B CN 201910012731 A CN201910012731 A CN 201910012731A CN 109783921 B CN109783921 B CN 109783921B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a heat affected zone evaluation method and device for an oil and gas conveying pipeline and computer equipment, wherein the method comprises the following steps: obtaining the pipeline thickness t of the oil gas conveying pipeline, and the predicted weld seam cover surface width We and root welding width Wr of the oil gas conveying pipeline; inputting the thickness t of the pipeline, the cover width We of the welding seam and the root welding width Wr into a heat affected zone evaluation model to determine the constraint condition of the width h of the heat affected zone of the oil and gas conveying pipeline, wherein the constraint condition of the width h of the heat affected zone is obtained by the heat affected zone evaluation model according to h < t- (We-Wr)/2 and t- (We-Wr)/2>0; and outputting constraint conditions of the width h of the heat affected zone obtained by the heat affected zone evaluation model. By the method and the device, the requirement of the heat affected zone is rapidly evaluated according to the thickness of the pipeline and the characteristics of the weld joint section.
Description
Technical Field
The invention relates to the technical field of welding of oil and gas conveying pipelines, in particular to a heat affected zone evaluation method and device of an oil and gas conveying pipeline and computer equipment.
Background
In the related art, in the process of welding the circumferential weld of the pipeline, the softening phenomenon of the heat affected zone of the circumferential weld is often found, and particularly for large-deformation steel, the softening phenomenon is more obvious. Because of high risk of the oil gas long-distance pipeline, the safety requirement is particularly strict, and the softening of the heat affected zone of the girth weld is taken as a negative factor of the girth weld, and effective measures are needed to be adopted for avoiding. In order to prevent fracture at the girth weld during the pipe stretching process, it is necessary to control the softening of the girth weld heat affected zone.
Disclosure of Invention
The invention aims to provide a heat affected zone assessment method and device for an oil and gas transmission pipeline and computer equipment, which are used for solving the technical problem of how to simply assess a Heat Affected Zone (HAZ) of a girth weld in the related technology.
In one aspect of the present invention, there is provided a method of estimating a heat affected zone of an oil and gas transmission pipe, the method implementing constraints for estimating the width of the heat affected zone of the oil and gas transmission pipe based on pipe thickness, predicted weld cap width, and root weld width, the method comprising: obtaining the pipeline thickness t of an oil gas conveying pipeline, and the predicted weld seam cover surface width We and root welding width Wr of the oil gas conveying pipeline; inputting the thickness t of the pipeline, the width We of the weld bead cover surface and the width Wr of the root weld into a heat affected zone evaluation model to determine the constraint condition of the width h of the heat affected zone of the oil and gas conveying pipeline, wherein the heat affected zone evaluation model obtains the constraint condition of the width h of the heat affected zone according to h < t- (We-Wr)/2 and t- (We-Wr)/2>0; and outputting constraint conditions of the width h of the heat affected zone obtained by the heat affected zone evaluation model.
In another aspect of the present invention, there is provided a performance evaluation method of an oil and gas transmission pipe, the method enabling evaluation of whether the oil and gas transmission pipe meets performance requirements including weld heat affected zone softening performance based on pipe thickness, weld cap width, and root weld width, the method comprising: detecting the thickness t of the oil gas transmission pipeline, the width We of the weld seam cover surface, the width Wr of the root welding and the width h of the heat affected zone; inputting the thickness t of the pipeline, the width We of the weld joint cover surface, the width Wr of the root welding and the width h of the heat affected zone into a heat affected zone evaluation model to judge whether the width h of the heat affected zone of the oil and gas conveying pipeline meets constraint conditions, wherein the constraint conditions are h < t- (We-Wr)/2 and t- (We-Wr)/2>0; when the heat affected zone width h < t- (We-Wr)/2 and t- (We-Wr)/2>0, determining that the welding of the oil and gas transmission pipeline meets the performance requirements.
In another aspect of the present invention, there is provided a method of determining a welding process for an oil and gas delivery pipe, the method enabling the determination of the welding process for the oil and gas delivery pipe based on pipe thickness, predicted weld cap width and root weld width, the method comprising: obtaining the pipeline thickness t of the oil gas conveying pipeline, and the predicted weld seam cover surface width We and root welding width Wr of the oil gas conveying pipeline; inputting the thickness t of the pipeline, the cover width We of the welding seam and the root welding width Wr into a heat affected zone evaluation model to determine the constraint condition of the width h of the heat affected zone of the oil and gas conveying pipeline, wherein the constraint condition of the width h of the heat affected zone is obtained by the heat affected zone evaluation model according to h < t- (We-Wr)/2 and t- (We-Wr)/2>0; and determining welding process information when the oil and gas conveying pipeline meets the constraint condition of the width h of the heat affected zone based on the corresponding relation between the constraint condition of the width h of the heat affected zone and the welding process information, wherein the welding process information comprises a welding method and process parameters corresponding to the welding method.
In yet another aspect of the present invention, there is provided a heat affected zone evaluation apparatus for an oil and gas transmission pipe, comprising: the acquisition module is used for acquiring the pipeline thickness t of the oil gas conveying pipeline, and the predicted weld seam cover surface width We and root welding width Wr of the oil gas conveying pipeline; the determining module is used for inputting the thickness t of the pipeline, the width We of the weld seam cover surface and the width Wr of the root weld into the heat affected zone evaluation model to determine the constraint condition of the width h of the heat affected zone of the oil and gas conveying pipeline, wherein the heat affected zone evaluation model obtains the constraint condition of the width h of the heat affected zone according to h < t- (We-Wr)/2 and t- (We-Wr)/2>0; and the output module is used for outputting constraint conditions of the width h of the heat affected zone obtained by the heat affected zone evaluation model.
In yet another aspect of the present invention, there is provided a performance evaluation apparatus for an oil and gas delivery pipe, comprising: the detection module is used for detecting the pipeline thickness t, the weld seam cover surface width We, the root welding width Wr and the heat affected zone width h of the oil gas conveying pipeline; the judging module is used for inputting the thickness t of the pipeline, the width We of the weld seam cover surface, the width Wr of the root welding and the width h of the heat affected zone into the heat affected zone evaluation model so as to judge whether the width h of the heat affected zone of the oil and gas conveying pipeline meets constraint conditions, wherein the constraint conditions are h < t- (We-Wr)/2 and t- (We-Wr)/2>0; and the determining module is used for determining that the welding of the oil and gas transmission pipeline meets the performance requirement when the width h of the heat affected zone is less than t- (We-Wr)/2 and t- (We-Wr)/2>0.
In yet another aspect of the present invention, there is provided a welding process determining apparatus for an oil and gas delivery pipe, comprising: the acquisition module is used for acquiring the pipeline thickness t of the oil gas conveying pipeline, and the predicted weld seam cover surface width We and root welding width Wr of the oil gas conveying pipeline; the first determining module is used for inputting the thickness t of the pipeline, the width We of the weld seam cover surface and the width Wr of the root weld into the heat affected zone evaluation model to determine the constraint condition of the width h of the heat affected zone of the oil and gas conveying pipeline, wherein the constraint condition of the width h of the heat affected zone is obtained by the heat affected zone evaluation model according to h < t- (We-Wr)/2 and t- (We-Wr)/2>0; the second determining module is used for determining welding process information when the oil and gas conveying pipeline meets the constraint condition of the width h of the heat affected zone based on the corresponding relation between the constraint condition of the width h of the heat affected zone and the welding process information, wherein the welding process information comprises a welding method and process parameters corresponding to the welding method.
In a further aspect of the invention, a computer device is provided comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any of the methods or the steps of any of the means described above when the computer program is executed.
Without limitation, the above-described methods and apparatus may be applied to the pipe of X70 or X80 type pipe steel sheet, evaluating girth welds made by hand welding (SMAW) and semi-automatic welding (FCAW-S). The method is particularly suitable for evaluating the oil gas transmission pipeline with high steel grade, large pipe diameter and high pressure.
According to the theory of material mechanics, the weakest direction in which a ductile material deforms is the 45 shear stress direction, and the fracture and strain concentration of the material occurs in the 45 shear direction (also known as the shear band). The inventors found that the girth weld deformation followed the 45 ° shear band theory, and designed a heat affected zone evaluation module based on this theory. Specifically, the heat affected zone evaluation model of the present disclosure yields constraints for the heat affected zone width h according to h < t- (We-Wr)/2 and t- (We-Wr)/2>0. Under the constraint condition, when deformation occurs under the condition of externally applied axial load, the 45-degree shearing band for the deformation of the girth weld falls outside the range of the heat affected zone, so that the girth weld is prevented from being broken near the seam when the deformation of the girth weld is concentrated in the range of the heat affected zone. Meanwhile, for the pipe thickness t, the weld cap width We and the root weld width need to satisfy t- (We-Wr)/2>0.
By the technical scheme provided by the invention, whether the near-seam fracture behavior of the girth weld occurs or not can be judged rapidly according to the characteristics of the section of the weld (the width We of the weld cover surface and the width of the root weld), the section size of the weld and the welding process are optimized, and the service safety of the weld is effectively ensured.
Drawings
FIG. 1 is a schematic illustration of a constraint-compliant duct according to the present invention;
FIG. 2 is a schematic illustration of an unconditional pipeline according to the invention;
FIG. 3 is a flow chart of a method of evaluating a heat affected zone of an oil and gas delivery pipe according to an embodiment of the present invention;
FIG. 4 is a block diagram of a heat affected zone estimation device for an oil and gas delivery pipe according to an embodiment of the present invention;
FIG. 5 is a flow chart of a method of performance assessment of an oil and gas delivery pipe according to an embodiment of the present invention;
FIG. 6 is a block diagram of a performance evaluation device for an oil and gas delivery pipe according to an embodiment of the present invention;
FIG. 7 is a flow chart of a method of determining a welding process for an oil and gas delivery pipe according to an embodiment of the present invention;
FIG. 8 is a block diagram of a welding process determination apparatus for an oil and gas delivery pipe according to an embodiment of the present invention; and
fig. 9 is a schematic diagram of a computer device according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
According to the theory of material mechanics, the weakest direction in which a ductile material deforms is the 45 shear stress direction, and the fracture and strain concentration of the material occurs in the 45 shear direction (also known as the shear band). The inventors of the present disclosure found that the girth weld deformation followed the 45 ° shear band theory, and designed a heat affected zone evaluation module based on the theory.
Without limitation, the heat affected zone evaluation model of the present disclosure yields constraints for the heat affected zone width h in terms of h < t- (We-Wr)/2 and t- (We-Wr)/2>0. Referring to fig. 1, when the constraint condition is satisfied and deformation occurs under the condition of externally applied axial load, the 45-degree shearing band for the deformation of the girth weld falls outside the range of the heat affected zone, so that the girth weld is prevented from being broken near the seam when the deformation of the girth weld is concentrated in the range of the heat affected zone. Referring to fig. 2, when the constraint condition is not satisfied and deformation occurs under the condition of axial load, the 45 ° shear band of the circumferential weld deformation falls within the heat affected zone, the circumferential weld deformation is concentrated within the heat affected zone, and the circumferential weld is liable to crack near the seam.
The present disclosure provides a heat affected zone assessment method for an oil and gas transfer pipe that achieves constraints for assessing the width of the heat affected zone of the oil and gas transfer pipe based on pipe thickness, predicted weld cap width, and root weld width.
FIG. 3 is a flowchart of a method for evaluating a heat affected zone of an oil and gas transmission pipeline according to an embodiment of the present invention, as shown in FIG. 3, the method includes steps S302 to S306.
In step S302, the pipe thickness t of the oil and gas conveying pipe, and the predicted weld cap width We and root width Wr of the oil and gas conveying pipe are obtained.
And S304, inputting the thickness t of the pipeline, the cover width We of the welding seam and the root width Wr into a heat affected zone evaluation model to determine the constraint condition of the width h of the heat affected zone of the oil and gas conveying pipeline, wherein the heat affected zone evaluation model obtains the constraint condition of the width h of the heat affected zone according to h < t- (We-Wr)/2 and t- (We-Wr)/2>0.
And step S306, outputting constraint conditions of the width h of the heat affected zone obtained by the heat affected zone evaluation model.
By the method, the constraint condition of the width of the heat affected zone of the pipeline is evaluated according to the thickness of the pipeline and under the condition that the section characteristics of the welding seam meet certain conditions.
In the embodiment of the disclosure, the pipe thickness t, the predicted weld cap width We and the root weld width Wr of the oil gas transmission pipe may be input through a computer graphic user interface, and the constraint condition of the heat affected zone width h obtained by the heat affected zone evaluation model may be output through the computer graphic user interface, but is not limited thereto.
The disclosure also provides a heat affected zone evaluation device for an oil and gas transmission pipeline.
FIG. 4 is a block diagram of a heat affected zone estimation apparatus for an oil and gas transmission pipeline according to an embodiment of the present invention, as shown in FIG. 4, the apparatus includes: an obtaining module 402, configured to obtain a pipe thickness t of the oil and gas conveying pipe, and an estimated weld cap width We and a root welding width Wr of the oil and gas conveying pipe; a determining module 404, coupled to the obtaining module 402, for inputting the pipe thickness t, the weld cap width We, and the root weld width Wr into a heat affected zone evaluation model to determine a constraint condition of the heat affected zone width h of the oil and gas conveying pipe, where the heat affected zone evaluation model obtains the constraint condition of the heat affected zone width h according to h < t- (We-Wr)/2 and t- (We-Wr)/2>0; and the output module 406 is connected with the determination module 404 and is used for outputting the constraint condition of the heat affected zone width h obtained by the heat affected zone evaluation model.
In the embodiment of the disclosure, for a pipeline with a given pipeline thickness, multiple groups of weld joint section characteristics can be set, constraint conditions of the width h of a heat affected zone corresponding to each group of weld joint section characteristics are evaluated, and constraint conditions of the weld joint section characteristics and the width h of the heat affected zone used in welding are selected according to the difficulty, cost and the like of a welding process.
The present disclosure also provides a performance evaluation method for an oil and gas delivery pipe, which enables evaluation of whether the oil and gas delivery pipe meets performance requirements including weld heat affected zone softening performance according to pipe thickness, weld cap width, and root weld width.
FIG. 5 is a flowchart of a method for evaluating performance of an oil and gas pipeline according to an embodiment of the present invention, as shown in FIG. 5, the method includes steps S502 to S506.
Step S502, detecting the thickness t of the oil gas transmission pipeline, the width We of the weld cap surface, the width Wr of the root weld and the width h of the heat affected zone.
Step S504, inputting the thickness t of the pipeline, the width We of the weld seam cover surface, the width Wr of the root welding and the width h of the heat affected zone into a heat affected zone evaluation model to judge whether the width h of the heat affected zone of the oil and gas conveying pipeline meets constraint conditions, wherein the constraint conditions are h < t- (We-Wr)/2 and t- (We-Wr)/2>0.
In step S506, when the width h of the heat affected zone is less than t- (We-Wr)/2 and t- (We-Wr)/2>0, the welding of the oil and gas transmission pipeline is determined to meet the performance requirement.
By the method, the performance of the pipeline is evaluated according to the thickness of the pipeline, the section characteristics of the welding seam and the width of the heat affected zone, and the method has the advantages of simplicity and easiness in operation.
The disclosure also provides a performance evaluation device for the oil and gas conveying pipeline.
FIG. 6 is a block diagram of a performance evaluation apparatus for an oil and gas delivery pipe according to an embodiment of the present invention, as shown in FIG. 6, the apparatus comprising: the detection module 602 is used for detecting the pipeline thickness t, the weld seam cover surface width We, the root welding width Wr and the heat affected zone width h of the oil gas transmission pipeline; the judging module 604 is connected with the detecting module 602, and is configured to input the pipe thickness t, the weld cap width We, the root welding width Wr and the heat affected zone width h into a heat affected zone evaluation model to judge whether the heat affected zone width h of the oil and gas conveying pipe meets constraint conditions, where the constraint conditions are h < t- (We-Wr)/2 and t- (We-Wr)/2>0; the determining module 606 is connected to the judging module 604, and is configured to determine that the welding of the oil and gas transmission pipeline meets the performance requirement when the width h of the heat affected zone is less than t- (We-Wr)/2 and t- (We-Wr)/2>0.
The present disclosure also provides a method of determining a welding process for an oil and gas delivery pipeline, which enables the welding process for an oil and gas delivery pipeline to be determined based on the pipeline thickness, the predicted weld cap width, and the root weld width.
FIG. 7 is a flowchart of a method for determining a welding process of an oil and gas transmission pipeline according to an embodiment of the present invention, as shown in FIG. 7, the method includes steps S702 to S706.
In step S702, the pipe thickness t of the oil and gas conveying pipe, and the predicted weld cap width We and root width Wr of the oil and gas conveying pipe are obtained.
Step S704, inputting the thickness t of the pipeline, the width We of the weld bead cover and the width Wr of the root weld into a heat affected zone evaluation model to determine the constraint condition of the width h of the heat affected zone of the oil and gas conveying pipeline, wherein the heat affected zone evaluation model obtains the constraint condition of the width h of the heat affected zone according to h < t- (We-Wr)/2 and t- (We-Wr)/2>0.
Step S706, based on the corresponding relation between the constraint condition of the width h of the heat affected zone and the welding process information, determining the welding process information when the oil and gas conveying pipeline meets the constraint condition of the width h of the heat affected zone, wherein the welding process information comprises a welding method and process parameters corresponding to the welding method.
By the method, the welding process of the pipeline is determined according to the pipeline thickness and the weld joint section characteristics of the pipeline, and the method has the advantages of simplicity and easiness in operation.
In the embodiment of the disclosure, the pipe thickness t of the oil gas conveying pipe, the predicted weld cap width We and the root welding width Wr of the oil gas conveying pipe can be obtained through a computer graphical user interface, and welding process information is output through the computer graphical user interface. The correspondence relation between the constraint condition of the heat affected zone width h and the welding process information is stored in advance in a database, but is not limited thereto.
The disclosure also provides a welding process determining device for the oil and gas conveying pipeline.
FIG. 8 is a block diagram of a welding process determination apparatus for oil and gas delivery pipes according to an embodiment of the present invention, as shown in FIG. 8, the apparatus comprising: an obtaining module 802, configured to obtain a pipe thickness t of the oil and gas conveying pipe, and an estimated weld cap width We and a root welding width Wr of the oil and gas conveying pipe; a first determining module 804, coupled to the obtaining module 802, configured to input the pipe thickness t, the weld cap width We, and the root weld width Wr into a heat affected zone evaluation model to determine a constraint condition of a heat affected zone width h of the oil and gas conveying pipe, where the heat affected zone evaluation model obtains the constraint condition of the heat affected zone width h according to h < t- (We-Wr)/2 and t- (We-Wr)/2>0; the second determining module 806 is connected to the first determining module 804, and is configured to determine welding process information when the oil and gas conveying pipeline meets the constraint condition of the heat affected zone width h based on the corresponding relationship between the constraint condition of the heat affected zone width h and the welding process information, where the welding process information includes a welding method and process parameters corresponding to the welding method.
Without limitation, the above method may be applied to the pipe of X70 or X80 type pipe steel sheet, evaluating girth welds made by manual welding (SMAW) and semi-automatic welding (FCAW-S).
The present embodiment also provides a computer device, such as a smart phone, a tablet computer, a notebook computer, a desktop computer, a rack-mounted server, a blade server, a tower server, or a rack-mounted server (including an independent server or a server cluster formed by a plurality of servers) that can execute a program. The computer device 20 of the present embodiment includes at least, but is not limited to: a memory 21, a processor 22, which may be communicatively coupled to each other via a system bus, as shown in fig. 9. It should be noted that fig. 9 only shows a computer device 20 having components 21-22, but it should be understood that not all of the illustrated components are required to be implemented, and that more or fewer components may alternatively be implemented.
In the present embodiment, the memory 21 (i.e., readable storage medium) includes a flash memory, a hard disk, a multimedia card, a card memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, and the like. In some embodiments, the memory 21 may be an internal storage unit of the computer device 20, such as a hard disk or memory of the computer device 20. In other embodiments, the memory 21 may also be an external storage device of the computer device 20, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the computer device 20. Of course, the memory 21 may also include both internal storage units of the computer device 20 and external storage devices. In this embodiment, the memory 21 is generally used to store an operating system and various types of application software installed in the computer device 20, for example, program codes of the seat task management device 10 of the first embodiment. Further, the memory 21 may be used to temporarily store various types of data that have been output or are to be output.
The processor 22 may be a central processing unit (Central Processing Unit, CPU), controller, microcontroller, microprocessor, or other data processing chip in some embodiments. The processor 22 is generally used to control the overall operation of the computer device 20. In this embodiment, the processor 22 is configured to execute the program code stored in the memory 21 or process data, such as any of the above-mentioned devices, to implement the corresponding method.
The present embodiment also provides a computer-readable storage medium such as a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, a server, an App application store, etc., on which a computer program is stored, which when executed by a processor, performs the corresponding functions. The computer readable storage medium of the present embodiment is configured to store any of the above-described apparatuses, and when executed by a processor, implement a corresponding method.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. A method of evaluating a heat affected zone of an oil and gas transmission pipeline, comprising:
obtaining the pipeline thickness t of an oil gas conveying pipeline, and the predicted weld seam cover surface width We and root welding width Wr of the oil gas conveying pipeline;
inputting the thickness t of the pipeline, the width We of the weld bead cover and the width Wr of the root weld into a heat affected zone evaluation model to determine a constraint condition of the width h of the heat affected zone of the oil and gas conveying pipeline, wherein the constraint condition of the width h of the heat affected zone is obtained by the heat affected zone evaluation model according to h < t- (We-Wr)/2 and t- (We-Wr)/2>0;
and outputting the constraint condition of the heat affected zone width h obtained by the heat affected zone evaluation model.
2. The method of claim 1, wherein the oil and gas delivery conduit is a conduit of a X70 or X80 type conduit steel sheet.
3. A method of evaluating performance of an oil and gas delivery conduit, comprising:
detecting the thickness t of the oil gas transmission pipeline, the width We of the weld seam cover surface, the width Wr of the root welding and the width h of the heat affected zone;
inputting the thickness t of the pipeline, the width We of the weld bead cover surface, the width Wr of the root weld and the width h of the heat affected zone into a heat affected zone evaluation model to judge whether the width h of the heat affected zone of the oil and gas conveying pipeline meets constraint conditions, wherein the constraint conditions are h < t- (We-Wr)/2 and t- (We-Wr)/2>0;
and determining that the welding of the oil and gas transmission pipeline meets the performance requirement when the width h of the heat affected zone is less than t- (We-Wr)/2 and t- (We-Wr)/2>0.
4. A method according to claim 3, wherein the oil and gas transportation pipeline is a pipeline of a pipeline steel plate of the X70 or X80 type.
5. A method of determining a welding process for an oil and gas delivery conduit, comprising:
obtaining the pipeline thickness t of an oil gas conveying pipeline, and the predicted weld seam cover surface width We and root welding width Wr of the oil gas conveying pipeline;
inputting the thickness t of the pipeline, the width We of the weld bead cover and the width Wr of the root weld into a heat affected zone evaluation model to determine a constraint condition of the width h of the heat affected zone of the oil and gas conveying pipeline, wherein the constraint condition of the width h of the heat affected zone is obtained by the heat affected zone evaluation model according to h < t- (We-Wr)/2 and t- (We-Wr)/2>0;
and determining welding process information when the oil gas conveying pipeline meets the constraint condition of the width h of the heat affected zone based on the corresponding relation between the constraint condition of the width h of the heat affected zone and the welding process information, wherein the welding process information comprises a welding method and process parameters corresponding to the welding method.
6. The method of claim 5, wherein the oil and gas delivery conduit is a conduit of a X70 or X80 type conduit steel sheet.
7. A heat affected zone evaluation device for an oil and gas transmission pipeline, comprising:
the acquisition module is used for acquiring the pipeline thickness t of the oil gas conveying pipeline, and the predicted weld seam cover surface width We and root welding width Wr of the oil gas conveying pipeline;
the determining module is used for inputting the thickness t of the pipeline, the width We of the weld bead cover and the width Wr of the root weld into a heat affected zone evaluation model to determine constraint conditions of the width h of the heat affected zone of the oil and gas conveying pipeline, wherein the constraint conditions of the width h of the heat affected zone are obtained by the heat affected zone evaluation model according to h < t- (We-Wr)/2 and t- (We-Wr)/2>0;
and the output module is used for outputting the constraint condition of the heat affected zone width h obtained by the heat affected zone evaluation model.
8. A performance evaluation device for an oil and gas delivery pipe, comprising:
the detection module is used for detecting the pipeline thickness t, the weld seam cover surface width We, the root welding width Wr and the heat affected zone width h of the oil gas conveying pipeline;
the judging module is used for inputting the thickness t of the pipeline, the width We of the weld joint cover surface, the width Wr of the root welding and the width h of the heat affected zone into a heat affected zone evaluation model so as to judge whether the width h of the heat affected zone of the oil and gas conveying pipeline meets constraint conditions, wherein the constraint conditions are h < t- (We-Wr)/2 and t- (We-Wr)/2>0;
and the determining module is used for determining that the welding of the oil gas transmission pipeline meets the performance requirement when the width h of the heat affected zone is smaller than t- (We-Wr)/2 and t- (We-Wr)/2>0.
9. A welding process determining apparatus for an oil and gas delivery pipe, comprising:
the acquisition module is used for acquiring the pipeline thickness t of the oil gas conveying pipeline, and the predicted weld seam cover surface width We and root welding width Wr of the oil gas conveying pipeline;
the first determining module is used for inputting the thickness t of the pipeline, the width We of the weld bead cover and the width Wr of the root weld into a heat affected zone evaluation model to determine constraint conditions of the width h of the heat affected zone of the oil and gas conveying pipeline, wherein the constraint conditions of the width h of the heat affected zone are obtained by the heat affected zone evaluation model according to h < t- (We-Wr)/2 and t- (We-Wr)/2>0;
the second determining module is used for determining welding process information when the oil gas conveying pipeline meets the constraint condition of the width h of the heat affected zone based on the corresponding relation between the constraint condition of the width h of the heat affected zone and the welding process information, wherein the welding process information comprises a welding method and process parameters corresponding to the welding method.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method according to any one of claims 1 to 6 when the computer program is executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910012731.0A CN109783921B (en) | 2019-01-07 | 2019-01-07 | Heat affected zone evaluation method and device for oil and gas conveying pipeline and computer equipment |
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