An instrument control pipeline arrangement selection method

Abstract

The application discloses a kind of instrument control pipeline arrangement selection methods, and the instrument control pipeline in the selection method includes at least one segment to be determined pipeline and at least two to be determined supports arranged on the pipeline to be determined, and the method comprises: obtaining the process pipeline parameter of the pipeline to be determined;According to the pipeline parameter, the initial span L v Is obtained;Determine whether the initial span L v Comply with the set constraint rule, if yes, then determine that the initial span L v It is set span, and the placement position of to-be-determined support is set according to set span;If not, adjust the position of to-be-determined support or increase to-be-determined support to adjust the initial span L v , until it complies with the set constraint rule.The instrument control pipeline arrangement selection method can quickly and conveniently determine the support and instrument control pipeline in the instrument control pipeline arrangement in the process of instrument control pipeline arrangement, and the arrangement period of instrument control pipeline is shortened by implementing the technical scheme of the application.

Description

Technical Field

[0001] This invention relates to the field of instrumentation and control piping, and more particularly to a method for selecting and arranging instrumentation and control piping. Background Technology

[0002] Instrumentation and control piping layout design is a post-design phase in engineering project construction and is influenced by upstream design and actual on-site installation conditions. Therefore, there are significant differences in instrumentation and control piping layouts among different power plants. When there are many design path limitations and a large number of potential instrumentation and control piping layouts, traditional instrumentation and control piping layout selection methods are labor-intensive, and this also leads to a significant workload when conducting safety analyses during the instrumentation and control piping selection process. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for selecting the layout of instrumentation and control pipelines in light of the prior art.

[0004] The technical solution adopted by this invention to solve its technical problem is: to provide a method for selecting the layout of instrumentation and control pipelines, wherein the instrumentation and control pipelines include at least one section of pipeline to be determined, and at least two supports to be determined installed on the pipeline to be determined, and the method includes the following steps:

[0005] S1: Obtain the process pipeline parameters of the pipeline to be determined;

[0006] S2: The initial span L is obtained based on the process pipeline parameters. v ;

[0007] S3: Determine the initial span L v Does it conform to the set constraint rules? If so, then determine the initial span L. v To set the span, the placement position of the bracket to be determined is set according to the set span; otherwise, the position of the bracket to be determined is adjusted or the bracket to be determined is added to adjust the initial span L. v This continues until the set constraint rules are met.

[0008] Preferably, the setting constraint rules include minimum span L min Maximum span L max The minimum span L min The maximum span L is 0.25 times the maximum span. max ;

[0009] Step S3 includes: determining the initial span L. v Does it meet the minimum span L? min <The initial span L v <The maximum span L maxIf yes, it is determined that the set constraint rules are met; otherwise, it is determined that the set constraint rules are not met.

[0010] Preferably, the process pipeline parameters include pipeline type and support type; the pipeline type includes horizontal straight pipe, vertical straight pipe, single bend pipe, Z-bend a, and Z-bend b; the support type includes guide support and three-way constraint fixing support.

[0011] Step S2 includes: determining the pipeline type based on the process pipeline parameters, and obtaining the corresponding initial span L. v .

[0012] Preferably, the maximum span L max Including horizontal straight pipe L max Vertical straight pipe L max The horizontal straight pipe L max Take the span l a , span l b and span l c The minimum value, wherein the span l a Take the maximum value in Formula 1, and the span l b Take the maximum value in Formula 2, and the span l c Take the maximum value in Formula 3; the vertical straight pipe L max Take the span l d , wherein the span l d Take the maximum value in Formula 4;

[0013] The span l a Determined through the calculation process of Formula 1:

[0014]

[0015] The span l b Determined through the calculation process of Formula 2:

[0016]

[0017] The span l c Determined through the calculation process of Formula 3:

[0018]

[0019] The span l d Determined through the calculation process of Formula 4:

[0020]

[0021] In the formula: S hLet w be the basic required stress of the pipe material at the design temperature, w be the pipe's section modulus, q be the sum of the pipe's linear weight and the medium's linear weight, and a be the basic required stress of the pipe material at the design temperature. xy For acceleration, a z Let x be the acceleration, and l be the distance from any point in the pipe to the left support point. b The maximum span L of the pipeline to be determined under its own weight with a stress of less than or equal to 10 MPa. max E is the elastic modulus, I is the moment of inertia of the pipe section, D is the pipe diameter, and g is the acceleration due to gravity.

[0022] Preferably, the pipeline to be determined includes a horizontal section, a vertical section, and an elbow connecting the horizontal section and the vertical section;

[0023] The set constraint rules include: minimum leg length, which is the distance from the nearest bracket to the bend to the bend; the minimum leg length is calculated using formula 5;

[0024] Formula 5 is:

[0025]

[0026] In the formula: ΔT is the temperature change, α is the linear thermal expansion coefficient, and S c Let L be the basic allowable stress of the material at room temperature (cold state), i be the stress enhancement factor, f be the stress reduction factor for the equivalent full-temperature cycle total number of cycles (N) under cyclic operating conditions during the equipment's service life, and L be the stress range reduction factor. m L is the distance from the bend to the nearest three-dimensional constraint fixing bracket on the vertical pipe. i This is the distance of the minimum leg length on the corresponding horizontal straight pipe.

[0027] Preferably, in step S2, based on the process pipeline parameters, the pipeline type is determined to be the horizontal straight pipe, and the initial span L is determined to be... v The distance between the two supports to be determined;

[0028] Step S3 includes: obtaining the horizontal straight pipe L max The horizontal straight pipe L max For the corresponding maximum span L max .

[0029] Preferably, in step S2, based on the process pipeline parameters, the pipeline type is determined to be the vertical straight pipe, and the initial span L is determined to be... v The distance between the two supports to be determined;

[0030] Step S3 includes: obtaining the vertical straight pipe L maxThe vertical straight pipe L max For the corresponding maximum span L max .

[0031] Preferably, when the pipeline type is the single-bend pipe, step S2 includes:

[0032] S21: Based on the process pipeline parameters, the pipeline type is determined to be the single bend pipe; the single bend pipe includes a horizontal section, a vertical section, and a bend; the support to be determined includes a first support closest to the bend on the horizontal section and a second support closest to the bend on the vertical section.

[0033] S22: Obtain the minimum leg length L4 and the minimum leg length L5; the minimum leg length L4 is the distance from the first bracket to the elbow; the minimum leg length L5 is the distance from the second bracket to the elbow;

[0034] S23: Obtain the initially set span L v The initial span L v It is the sum of the minimum leg length L4 and the minimum leg length L5.

[0035] Preferably, step S22 includes: determining whether the minimum leg length L4 and the minimum leg length L5 are both greater than or equal to 150mm, and whether the minimum leg length L4 or the minimum leg length L5 is less than 400mm; if so, determining the minimum leg length L4 and the minimum leg length L5; if not, readjusting the position of the bracket to be determined to adjust the minimum leg length L4 and the minimum leg length L5 until the constraints are met.

[0036] Preferably, when the pipeline type is a Z-bend a, step S2 includes:

[0037] S21: Based on the process pipeline parameters, the pipeline type is determined to be Z-type bend a; the Z-type bend a includes two horizontal sections, one vertical section, two elbows, and a support to be determined located at position I on the vertical section; the support to be determined includes a third support and a fourth support located on the two horizontal sections respectively closest to the elbow, and a fifth support located on the vertical section;

[0038] S22: Obtain minimum leg length L6, minimum leg length L 7-1 Minimum leg length L 7-2 and the minimum leg length L8; the minimum leg length L6 is the distance from the third bracket to the nearest bend; the minimum leg length L 7-1The distance from the fifth bracket to the bend corresponding to the third bracket; the minimum leg length L8 is the distance from the fourth bracket to the nearest bend; the minimum leg length L... 7-2 The distance from the fifth bracket to the bend corresponding to the fourth bracket;

[0039] S23: Obtain the initially set span L v The initial span L v The minimum leg length L6 and the minimum leg length L 7-1 The sum of the two, and the other initial span L. v The minimum leg length L 7-2 The sum of the minimum leg length L8.

[0040] Preferably, step S22 includes: determining the type of the support at position I; if the support type is the guide support, then it is necessary to determine whether the sum of the minimum leg length L6 and the minimum leg length L8 is greater than 1.5 times the minimum leg length L. 7-1 With the minimum leg length L 7-2 If the sum is true, then determine the minimum leg length L6 and the minimum leg length L8; otherwise, readjust the position of the bracket to be determined to adjust the minimum leg length L6 and the minimum leg length L8 until the constraint is satisfied.

[0041] Preferably, when the pipeline type is a Z-bend b, step S2 includes:

[0042] S21: Based on the process pipeline parameters, the pipeline type is determined to be Z-type bend b, which includes two horizontal sections, one vertical section, and two elbows; the supports to be determined include a sixth support and a seventh support respectively set on the two horizontal sections closest to the elbows.

[0043] S22: Obtain the minimum leg length L 11 Minimum leg length L 12 and the length L of the vertical section in the Z-shaped bend b. 13 The minimum leg length L 11 The distance from the sixth bracket to the nearest corresponding bend; the minimum leg length L 12 The distance from the seventh bracket to the nearest bend;

[0044] S23: Obtain the initially set span L v The initial span L v The minimum leg length L 11 With the minimum leg length L 12and the length L of the vertical segment 13 sum.

[0045] Preferably, step S22 includes: determining the minimum leg length L. 11 The minimum leg length L 12 and the length L of the vertical tube 13 Are all of them greater than or equal to 150mm, and is the minimum leg length L... 11 The minimum leg length L 12 and the length L of the vertical segment 13 Does it satisfy the constraint of Formula 7? If so, determine the minimum leg length L. 11 The minimum leg length L 12 and the length L of the vertical segment 13 If not, readjust the position of the bracket to be determined or the length L of the vertical section. 13 To adjust the minimum leg length L 11 The minimum leg length L 12 and the length L of the vertical segment 13 Continue until the constraints are satisfied;

[0046] The calculation process for Formula 7 is as follows:

[0047]

[0048] In the formula: L 13 The length of the vertical section in the Z-shaped bend b.

[0049] Preferably, in step S2, the pipeline type is obtained based on the process pipeline parameters. When the pipeline type is the single bend, Z-bend a, or Z-bend b, step S3 includes:

[0050] S31: Obtain the horizontal straight pipe L max The vertical straight pipe L max ;

[0051] S32: The horizontal straight pipe L max With the vertical straight pipe L max By comparison, the horizontal straight pipe L is obtained. max With the vertical straight pipe L max The minimum value in, wherein the minimum value is the maximum span L max .

[0052] Implementing the technical solution of the present invention has the following beneficial effects: by using the maximum span L max The initial span L is determined by the setting. vWhether the constraints are met depends on the calculation process used for different pipeline types to determine the initial span L of the corresponding pipeline. v This allows for the determination of the placement location of the supports to be determined, quickly and conveniently identifying the positions of the supports in the instrumentation and control piping layout. Furthermore, during the safety analysis, the overall layout cycle of the instrumentation and control piping is significantly shortened based on the constraint rules set in this scheme. Attached Figure Description

[0053] The following figures, in conjunction with the accompanying drawings and embodiments, will further illustrate the present invention.

[0054] Figure 1 This is a flowchart illustrating an embodiment of the present invention;

[0055] Figure 2 This is a schematic diagram of a horizontal straight pipe support in an embodiment of the present invention;

[0056] Figure 3 This is a schematic diagram of the vertical straight pipe support in an embodiment of the present invention;

[0057] Figure 4 This is a schematic diagram of a single-bend pipe support in an embodiment of the present invention;

[0058] Figure 5 This is a schematic diagram of the Z-shaped bend a support in an embodiment of the present invention;

[0059] Figure 6 This is a schematic diagram of the Z-shaped bend b support in an embodiment of the present invention;

[0060] Figure 7 This is a simplified schematic diagram of the flexibility deformation model in an embodiment of the present invention. Detailed Implementation

[0061] like Figure 1 The diagram shown is a flowchart illustrating a method for selecting and arranging instrumentation and control piping according to the present invention, specifically including:

[0062] Step S1: Obtain the process pipeline parameters of the pipeline to be determined.

[0063] In this step, by obtaining the process pipeline parameters, the parameter information of the instrumentation and control pipelines to be arranged and selected can be obtained. The parameter information includes pipeline type, pipeline diameter, pipeline wall thickness, pipeline material, and support type. Among them, pipeline types include horizontal straight pipe, vertical straight pipe, single bend pipe, Z-type bend a, and Z-type bend b, and support types include guide support and three-way constraint fixed support.

[0064] like Figure 4As shown, in this embodiment, the single bend includes a horizontal section, a vertical section, and an elbow, wherein the horizontal section and the vertical section are connected by the elbow; a three-way constraint fixing bracket is provided in both the horizontal section and the vertical section.

[0065] like Figure 5 As shown, in this embodiment, the Z-shaped bend a includes two horizontal sections, one vertical section, two bends, and a bracket to be determined set at position I. The horizontal sections are connected to both ends of the vertical section through the bends. The vertical section is provided with a guide bracket or a three-way constraint fixing bracket, and the horizontal sections are provided with three-way constraint fixing brackets.

[0066] like Figure 6 As shown, in this embodiment, the Z-shaped bend b includes two horizontal sections, one vertical section, and two elbows. The horizontal sections are connected to both ends of the vertical section through the elbows. A three-way constraint fixing bracket is provided in both the horizontal and vertical sections.

[0067] like Figure 1 As shown, step S2: Obtain the initial span L based on the process pipeline parameters. v .

[0068] In this step, based on the obtained pipeline type, the pipeline type is determined, and after determining the pipeline type, the corresponding initial span L is obtained. v Initial span L for different pipeline types v Determined through different calculation processes.

[0069] like Figure 1 As shown, step S3: Determine the initial span L v Does it conform to the set constraint rules? If so, then determine the initial span L. v To set the span, the placement position of the support to be determined is set according to the set span; otherwise, the position of the support to be determined is adjusted or an additional support is added to adjust the initial span L. v Until the set constraint rules are met.

[0070] In this step, the constraint rules are set, including the maximum span L. max Minimum span L min Among them, the minimum span L min 0.25 times the maximum span L max In step S2, the corresponding initial span L is obtained. v Then, the obtained initial span L needs to be adjusted according to the set constraint rules. v Make a judgment, that is, the minimum span L min <Initial span L v <Maximum span L max If the corresponding initial span L vIf the set constraint rules are met, then according to the corresponding initial span L v Determine the location of the support to be determined; if the corresponding initial span L v If the set constraint rules are not met, it is necessary to readjust the support frame to be determined or add more support frames to adjust the initial span L. v This continues until the set constraint rules are met.

[0071] In this embodiment, the maximum span L max Including horizontal straight pipe L max Vertical straight pipe L max Horizontal straight pipe L max Take the span l a , span l b and span l c The minimum value, where the span l a Take the maximum value in Formula 1, and the span l b Take the maximum value in Formula 2, and the span l c Take the maximum value in Formula 3; Vertical straight pipe L max Take the span l d , where the span l d Take the maximum value in Formula 4; span l a Subject to deflection constraints, i.e., according to the RCC-M specification, the allowable pipe sagging between two supports to be determined is no more than 2.5 mm; span l a Determined through the calculation process of Formula 1:

[0072]

[0073] span l b Subject to stress constraints, i.e., according to the RCC-M standard, the stress of the pipeline under its own weight must be less than or equal to 10 MPa; span l b Determined through the calculation process of Formula 2:

[0074]

[0075] span l c Constrained by the stress intensity of horizontal pipelines, that is, according to the requirements of RCC-MC3600 standard, under seismic conditions, the horizontal pipelines are subject to stress intensity constraints while meeting the stress constraints; span l c Determined through the calculation process of Formula 3:

[0076]

[0077] span l d Constrained by the stress intensity of the vertical pipeline, that is, according to the RCC-MC3600 standard, under seismic conditions, the vertical pipeline is constrained by the stress intensity; span l dDetermined through the calculation process of Formula 4:

[0078]

[0079] In the formula: S h The basic required stress of the pipe material at the design temperature, w is the pipe bending section modulus, q is the total linear weight, which is equal to the sum of the linear weight of the pipe and the linear weight of the medium, and a xy For acceleration, a z Let x be the acceleration, and l be the distance from any point in the pipe to the left support point. b The maximum span L of the pipeline to be determined under its own weight with a stress of less than or equal to 10 MPa. max E is the elastic modulus, I is the moment of inertia of the pipe section, D is the pipe diameter, and g is the acceleration due to gravity.

[0080] like Figure 2-6 As shown, in this embodiment, the pipeline to be determined includes a horizontal section, a vertical section, and an elbow connecting the horizontal and vertical sections. If the pipeline to be determined includes at least one horizontal section, one vertical section, and one elbow, the pipeline to be determined will undergo thermal expansion deformation at the elbow due to the influence of ambient temperature or pipe medium temperature, requiring a certain degree of flexibility. Therefore, the initial span L is set... v When setting the parameters, the effect of thermal expansion deformation must be considered. Thermal expansion deformation is determined by formula 6:

[0081] The calculation process of Formula 6:

[0082] ΔL1=αΔTL m Formula 6

[0083] In the formula: ΔT is the temperature change, α is the linear thermal expansion coefficient, and L m This refers to the distance from the nearest three-way constraint bracket to the bend on the corresponding horizontal straight pipe.

[0084] In this embodiment, a minimum leg length is set at the bend to meet the requirements of thermal expansion deformation. The constraint rules also include a minimum leg length constraint. The minimum leg length is the distance from the nearest bracket to the bend to the bend. The minimum leg length is constrained by Formula 5.

[0085] Formula 5 is:

[0086]

[0087] In the formula: ΔT is the temperature change, α is the linear thermal expansion coefficient, and S c Let L be the basic allowable stress of the material at room temperature (cold state), i be the stress enhancement factor, f be the stress reduction factor for the equivalent full-temperature cycle total number of cycles (N) under cyclic operating conditions during the equipment's service life, and L be the stress range reduction factor. mTo correspond to the distance from the nearest three-dimensional constraint fixing bracket to the bend on the vertical straight pipe, L i This is the distance of the minimum leg length on the corresponding horizontal straight pipe.

[0088] like Figure 2 As shown, in this embodiment, based on the process pipeline parameters, when the pipeline type is a horizontal straight pipe, the initial span L is set. v This represents the actual distance between the two supports to be determined.

[0089] like Figure 3 As shown, further, in another embodiment, based on the process pipeline parameters, when the pipeline type is determined to be a vertical straight pipe, the initial span L is set. v This represents the actual distance between the two supports to be determined.

[0090] like Figure 4 As shown, further, in another embodiment, based on the process pipeline parameters, the pipeline type is determined to be a single-bend pipe, with an initial span L. v It is the sum of the minimum leg length L4 and the minimum leg length L5;

[0091] Specifically, the following steps are included:

[0092] S21: Based on the process pipeline parameters, the pipeline type is determined to be a single bend; the single bend includes a horizontal section, a vertical section, and a bend; the supports to be determined include a first support closest to the bend on the horizontal section and a second support closest to the bend on the vertical section.

[0093] S22: Obtain the minimum leg length L4 and minimum leg length L5; minimum leg length L4 is the distance from the first support to the bend; minimum leg length L5 is the distance from the second support to the bend;

[0094] S23: Obtain the initial span L v Initially set span L v It is the sum of the minimum leg length L4 and the minimum leg length L5. The minimum leg length L4 is the distance L from the vertical section's three-way constraint fixing bracket to the bend. 16 The minimum leg length L5 is constrained by the three-dimensional constraint of the horizontal section, and the distance L3 from the fixed bracket to the bend is also constrained.

[0095] like Figure 4 As shown, further, in another embodiment, step S22 includes: determining whether the minimum leg length L4 and the minimum leg length L5 are both greater than or equal to 150mm, and whether the minimum leg length L4 or the minimum leg length L5 is less than 400mm; if so, determining the minimum leg length L4 and the minimum leg length L5; if not, readjusting the position of the bracket to be determined to adjust the minimum leg length L4 and the minimum leg length L5 until the constraints are met.

[0096] like Figure 5 As shown, further, in another embodiment, based on the process pipeline parameters, the pipeline type is determined to be a Z-type bend a, with an initial span L. v For the minimum leg length L6 and the minimum leg length L 7-1 The sum of the two initial spans, L v Minimum leg length L 7-2 The sum of the minimum leg length L8;

[0097] Specifically, the following steps are included:

[0098] S21: Based on the process pipeline parameters, the pipeline type is Z-type bend a; Z-type bend a includes two horizontal sections, one vertical section, and two elbows; the supports to be determined include the third and fourth supports closest to the elbows on the two horizontal sections, and the fifth support on the vertical section.

[0099] S22: Obtain minimum leg length L6, minimum leg length L 7-1 Minimum leg length L 7-2 And the minimum leg length L8; the minimum leg length L6 is the distance from the third support to the nearest bend; the minimum leg length L 7-1 The distance from the fifth support to the bend corresponding to the third support; the minimum leg length L8 is the distance from the fourth support to the nearest bend; the minimum leg length L... 7-2 This is the distance from the fifth support to the bend corresponding to the fourth support;

[0100] S23: Obtain the initial span L v Initially set span L v For the minimum leg length L6 and the minimum leg length L 7-1 The sum of the two initial spans, L v Minimum leg length L 7-2 The sum of the minimum leg length L8.

[0101] Among them, the minimum leg lengths L6 and L8 are constrained by the distance from the corresponding three-way constraint fixed bracket on the vertical section to the corresponding bend; the minimum leg length L 7-1 Constrained by the length L9 from the fixed bracket to the corresponding bend under three-dimensional constraints; minimum leg length L 7-2 The length L from the three-dimensionally constrained fixed bracket to the corresponding bend 10 constraint.

[0102] like Figure 5As shown, further, in another embodiment, when the pipeline type is determined to be Z-bend a based on the process pipeline parameters, the support type at position I needs to be determined. If the support type is a guide support, it is necessary to determine whether the sum of the minimum leg length L6 and the minimum leg length L8 is greater than 1.5 times the minimum leg length L. 7-1 With minimum leg length L 7-2 If the sum is true, then determine the minimum leg length L6 and the minimum leg length L8. If not, readjust the position of the bracket to be determined to adjust the minimum leg length L6 and the minimum leg length L8 until the constraints are met.

[0103] like Figure 6 As shown, further, in another embodiment, based on the process pipeline parameters, the pipeline type is determined to be a Z-type bend b; the initial span L is set. v Minimum leg length L 11 With minimum leg length L 12 and the length L of the vertical segment 13 sum;

[0104] Specifically, the following steps are included:

[0105] S21: Based on the process pipeline parameters, the pipeline type is Z-type bend b. Z-type bend b includes two horizontal sections, one vertical section, and two elbows. The supports to be determined include the sixth and seventh supports, which are closest to the corresponding elbows, respectively, set on the two horizontal sections.

[0106] S22: Obtain the minimum leg length L 11 Minimum leg length L 12 And the length L of the vertical section in the Z-shaped bend b. 13 Minimum leg length L 11 The distance from the sixth support to the nearest bend; minimum leg length L 12 This is the distance from the seventh support to the nearest bend.

[0107] S23: Obtain the initial span L v Initially set span L v Minimum leg length L 11 With minimum leg length L 12 and the length L of the vertical segment 13 sum.

[0108] Among them, the minimum leg length L 11 Minimum leg length L 12 The distance from the fixed bracket to the corresponding bend is constrained by the three-dimensional constraint on the vertical segment.

[0109] like Figure 6 As shown, further, in another embodiment, in step S22, it is necessary to determine the minimum leg length L.11 Minimum leg length L 12 and the length L of the vertical segment 13 Are all of them greater than or equal to 150mm, and is the minimum leg length L... 11 Minimum leg length L 12 and the length L of the vertical segment 13 Does it satisfy the constraint of Formula 7? If so, determine the minimum leg length L. 11 Minimum leg length L 12 and the length L of the vertical segment 13 If not, readjust the position of the bracket to be determined or the vertical length L. 13 To adjust the minimum leg length L 11 Minimum leg length L 12 and the length L of the vertical segment 13 Continue until the constraints are satisfied;

[0110]

[0111] The calculation process for Formula 7 is as follows:

[0112] In the formula: L 13 is the length of the vertical section in the Z-shaped bend b.

[0113] In this embodiment, the minimum leg length L4, minimum leg length L5, minimum leg length L6, and minimum leg length L... 7-1 Minimum leg length L 7-2 Minimum leg length L8, minimum leg length L 11 and minimum leg length L 12 All are constrained by Formula 5.

[0114] like Figure 2 As shown, in this embodiment, in step S3, based on the process pipeline parameters, the pipeline type is determined to be a horizontal straight pipe, and the horizontal straight pipe L is determined using formulas 1, 2, and 3. max Horizontal straight pipe L max The maximum span L of the horizontal straight pipe max .

[0115] like Figure 3 As shown, in another embodiment, in step S3, based on the process pipeline parameters, the pipeline type is determined to be a vertical straight pipe, and the vertical straight pipe L is determined using formula 4. max Vertical straight pipe L max The maximum span L of the vertical straight pipe max .

[0116] like Figure 4-6As shown, further, in another embodiment, if the pipeline type is a single bend, a Z-bend a, or a Z-bend b, the maximum span L is obtained. max Specifically, the following steps are included:

[0117] S31: Obtain the horizontal straight pipe L max Vertical straight pipe L max ;

[0118] S32: Horizontal straight pipe L max With vertical straight pipe L max By comparison, the horizontal straight pipe L was obtained. max With vertical straight pipe L max The minimum value in the range is the maximum span L. max .

[0119] Among them, horizontal straight pipe L max Determined by formulas 1, 2, and 3; Vertical straight pipe L max Determined by Formula 4.

[0120] In this embodiment, the entire pipeline to be determined can be arranged by two or more segments of the same pipeline type, or by two or more segments of different pipeline types. If the entire pipeline to be determined is arranged by the same pipeline type, the entire pipeline to be determined is divided into several individual pipelines, the initial span of each segment of the pipeline to be determined is determined, and the pipeline is arranged according to the determined initial span. If the entire pipeline to be determined is arranged by different pipeline types, the entire pipeline to be determined is divided into several individual pipelines, the corresponding initial span is determined according to the corresponding pipeline type, and the pipeline is arranged according to the determined corresponding initial span.

[0121] In this embodiment, if the pipeline type is a horizontal straight pipe or a vertical straight pipe, the maximum span L is determined. max and minimum span L min Then, based on the maximum span L max and minimum span L min The placement of the supports to be determined is carried out, provided that the placement positions of adjacent supports meet the minimum span L. min <Initial span L v <Maximum span L max By setting the constraint rules, the bracket to be determined can be placed.

[0122] In this embodiment, if the pipeline type is a single bend, a Z-bend a, or a Z-bend b, the maximum span L is determined. max and minimum span L min Then, based on the maximum span L max and minimum span L min The placement of the supports to be determined is carried out, and the placement positions of adjacent supports to be determined meet the minimum span L.min <Initial span L v <Maximum span L max While setting the constraint rules, the distance between the nearest bracket to the bend and the bend must meet the minimum leg length requirement.

[0123] In this embodiment, the maximum span L of the corresponding pipeline is obtained. max Based on the process pipeline parameters of the corresponding pipeline, a fixed maximum span L is formed. max Under the same conditions, the relationship can be directly called; obtain the minimum leg length of the corresponding pipeline, and form a fixed minimum leg length relationship based on the process parameters of the corresponding pipeline. Under the same conditions, it can be directly called.

[0124] In this embodiment, the envelope load of each support is determined according to the arrangement of the supports, and the maximum value of the envelope load under each condition is taken as the design load for the selection and design of the supporting steel structure.

[0125] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. For those skilled in the art, the above features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A method for selecting the layout of instrumentation and control piping, wherein the instrumentation and control piping includes at least one section of pipeline to be determined, and at least two supports to be determined installed on the pipeline to be determined, characterized in that, The method includes the following steps: S1: Obtain the process pipeline parameters of the pipeline to be determined; S2: The initial span L is obtained based on the process pipeline parameters. v ; S3: Determine the initial span L v Does it conform to the set constraint rules? If so, then determine the initial span L. v To set the span, the placement position of the bracket to be determined is set according to the set span; otherwise, the position of the bracket to be determined is adjusted or the bracket to be determined is added to adjust the initial span Lv until it meets the set constraint rules; the set constraint rules include a minimum span L. min Maximum span L max The minimum span L min The maximum span L is 0.25 times the maximum span L. max ; Step S3 includes: determining the initial span L. v Does it meet the minimum span L? min <The initial span L v <The maximum span L max If yes, it is determined to conform to the set constraint rules; if no, it is determined to not conform to the set constraint rules; the maximum span L max Including horizontal straight pipe L max Vertical straight pipe L max The horizontal straight pipe L max Take the span l a , span l b and span l c The minimum value, wherein the span l a Take the maximum value in Formula 1, and the span l b Take the maximum value in Formula 2, and the span l c Take the maximum value in Formula 3; the vertical straight pipe L max Take the span l d , wherein the span l d Take the maximum value in Formula 4; The span l a Determined through the calculation process of Formula 1: Official 1 The span l b Determined through the calculation process of Formula 2: Official 2 The span l c Determined through the calculation process of Formula 3: Official 3 The span l d Determined through the calculation process of Formula 4: Official 4 In the formula: S h Let w be the basic required stress of the pipe material at the design temperature, w be the pipe's section modulus, q be the sum of the pipe's linear weight and the medium's linear weight, and a be the basic required stress of the pipe material at the design temperature. xy For acceleration, a z Let x be the acceleration, and l be the distance from any point in the pipe to the left support point. b The maximum span L of the pipeline to be determined under its own weight with a stress of less than or equal to 10 MPa. max E is the elastic modulus, I is the moment of inertia of the pipe section, D is the pipe diameter, and g is the acceleration due to gravity. The pipeline to be determined includes a horizontal section, a vertical section, and an elbow connecting the horizontal section and the vertical section; The set constraint rules include: minimum leg length, which is the distance from the nearest bracket to the bend to the bend; the minimum leg length is calculated using formula 5; Formula 5 is: Official 5 In the formula: ΔT is the temperature change, α is the linear thermal expansion coefficient, and S c Let L be the basic allowable stress of the material at room temperature (cold state), i be the stress enhancement factor, f be the stress reduction factor for the equivalent full-temperature cycle total number of cycles (N) under cyclic operating conditions during the equipment's service life, and L be the stress range reduction factor. m To correspond to the distance from the bend to the nearest three-way constraint fixing bracket on the vertical pipe, L i This is the distance of the minimum leg length on the corresponding horizontal straight pipe.

2. The instrumentation and control piping layout selection method according to claim 1, characterized in that, The process pipeline parameters include pipeline type and support type; the pipeline type includes horizontal straight pipe, vertical straight pipe, single bend pipe, Z-bend a, and Z-bend b; the support type includes guide support and three-way constraint fixed support. Step S2 includes: determining the pipeline type based on the process pipeline parameters, and obtaining the corresponding initial span L. v .

3. The instrumentation and control piping layout selection method according to claim 1, characterized in that, In step S2, based on the process pipeline parameters, the pipeline type is determined to be the horizontal straight pipe, and the initial span L is determined. v The distance between the two supports to be determined; Step S3 includes: obtaining the horizontal straight pipe L max The horizontal straight pipe L max For the corresponding maximum span L max .

4. The instrumentation and control piping layout selection method according to claim 1, characterized in that, In step S2, based on the process pipeline parameters, the pipeline type is determined to be a vertical straight pipe, and the initial span L is determined to be... v The distance between the two supports to be determined; Step S3 includes: obtaining the vertical straight pipe L max The vertical straight pipe L max For the corresponding maximum span L max .

5. The instrumentation and control piping layout selection method according to claim 1, characterized in that, When the pipeline type is the single-bend pipe, step S2 includes: S21: Based on the process pipeline parameters, the pipeline type is determined to be the single bend pipe; the single bend pipe includes a horizontal section, a vertical section, and a bend; the support to be determined includes a first support closest to the bend on the horizontal section and a second support closest to the bend on the vertical section. S22: Obtain the minimum leg length L4 and the minimum leg length L5; the minimum leg length L4 is the distance from the first bracket to the elbow; the minimum leg length L5 is the distance from the second bracket to the elbow; S23: Obtain the initially set span L v The initial span L v It is the sum of the minimum leg length L4 and the minimum leg length L5.

6. The instrumentation and control piping layout selection method according to claim 5, characterized in that, Step S22 includes: determining whether the minimum leg length L4 and the minimum leg length L5 are both greater than or equal to 150mm, and whether the minimum leg length L4 or the minimum leg length L5 is less than 400mm; if so, determining the minimum leg length L4 and the minimum leg length L5; if not, readjusting the position of the bracket to be determined to adjust the minimum leg length L4 and the minimum leg length L5 until the constraints are met.

7. The instrumentation and control piping layout selection method according to claim 1, characterized in that, When the pipeline type is a Z-bend a, step S2 includes: S21: Based on the process pipeline parameters, the pipeline type is determined to be Z-type bend a; the Z-type bend a includes two horizontal sections, one vertical section, two elbows, and a support to be determined located at position I on the vertical section; the support to be determined includes a third support and a fourth support located on the two horizontal sections respectively closest to the elbow, and a fifth support located on the vertical section; S22: Obtain minimum leg length L6, minimum leg length L 7-1 Minimum leg length L 7-2 and the minimum leg length L8; the minimum leg length L6 is the distance from the third bracket to the nearest bend; the minimum leg length L 7-1 The distance from the fifth bracket to the bend corresponding to the third bracket; the minimum leg length L8 is the distance from the fourth bracket to the nearest bend; the minimum leg length L... 7-2 The distance from the fifth bracket to the bend corresponding to the fourth bracket; S23: Obtain the initially set span L v The initial span L v The minimum leg length L6 and the minimum leg length L 7-1 The sum of the two, and the other initial span L. v The minimum leg length L 7-2 The sum of the minimum leg length L8.

8. The instrumentation and control piping layout selection method according to claim 7, characterized in that, Step S22 includes: determining the type of support at position I; if the support type is the guide support, then it is necessary to determine whether the sum of the minimum leg length L6 and the minimum leg length L8 is greater than 1.5 times the minimum leg length L. 7-1 With the minimum leg length L 7-2 If the sum is true, then determine the minimum leg length L6 and the minimum leg length L8; otherwise, readjust the position of the bracket to be determined to adjust the minimum leg length L6 and the minimum leg length L8 until the constraint is satisfied.

9. The method for selecting and arranging instrumentation and control piping according to claim 1, characterized in that, When the pipeline type is a Z-bend b, step S2 includes: S21: Based on the process pipeline parameters, the pipeline type is determined to be Z-type bend b, which includes two horizontal sections, one vertical section, and two elbows; the supports to be determined include a sixth support and a seventh support respectively set on the two horizontal sections closest to the elbows. S22: Obtain the minimum leg length L 11 Minimum leg length L 12 and the length L of the vertical section in the Z-shaped bend b. 13 The minimum leg length L 11 The distance from the sixth bracket to the nearest corresponding bend; the minimum leg length L 12 The distance from the seventh bracket to the nearest bend; S23: Obtain the initially set span L v The initial span L v The minimum leg length L 11 With the minimum leg length L 12 and the length L of the vertical segment 13 sum.

10. The method for selecting and arranging instrumentation and control piping according to claim 9, characterized in that, Step S22 includes: determining the minimum leg length L. 11 The minimum leg length L 12 and the length L of the vertical segment 13 Are all of them greater than or equal to 150mm, and is the minimum leg length L... 11 The minimum leg length L 12 and the length L of the vertical segment 13 Does it satisfy the constraint of Formula 7? If so, determine the minimum leg length L. 11 The minimum leg length L 12 and the length L of the vertical segment 13 If not, readjust the position of the bracket to be determined or the length L of the vertical section. 13 To adjust the minimum leg length L 11 The minimum leg length L 12 and the length L of the vertical segment 13 Continue until the constraints are satisfied; The calculation process for Formula 7 is as follows: In the formula: L 13 The length of the vertical section in the Z-shaped bend b.

11. The instrumentation and control piping layout selection method according to claim 1, characterized in that, In step S2, the pipeline type is obtained based on the process pipeline parameters. When the pipeline type is the single bend, Z-bend a, or Z-bend b, step S3 includes: S31: Obtain the horizontal straight pipe L max The vertical straight pipe L max ; S32: The horizontal straight pipe L max With the vertical straight pipe L max By comparison, the horizontal straight pipe L is obtained. max With the vertical straight pipe L max The minimum value in, wherein the minimum value is the maximum span L max .

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