Parameter design method and device for multi-stage orifice plate based on pipeline transportation

Abstract

The application provides a parameter design method and device for a multi-stage flow-restricting orifice plate based on pipeline transportation, and relates to the technical field of pipeline transportation. The method comprises the following steps: firstly, a multi-stage flow-restricting orifice plate parameter generation model is constructed based on a pre-generated flow-restricting orifice plate basic parameter relationship model and an orifice plate aperture calculation model; then, the design parameters of each stage of flow-restricting orifice plates are determined by using the multi-stage flow-restricting orifice plate parameter generation model; and finally, each stage of flow-restricting orifice plates of a throttling element in a pipeline are set according to the design parameters, so that medium flow restriction in the pipeline transportation process is realized. The technical problems of large parameter design error and low calculation efficiency of an existing orifice plate are solved, and the technical effects of improving calculation precision and calculation efficiency are achieved.

Description

Technical Field

[0001] This invention relates to the field of pipeline transportation technology, and in particular to a parameter design method and apparatus for a multi-stage flow-limiting orifice plate based on pipeline transportation. Background Technology

[0002] The petrochemical and nuclear industries primarily utilize pipeline transportation. Pipeline transportation often employs orifice plates to limit the flow of the medium, thereby reducing the erosion of valves and other pipe fittings by the fluid. As a throttling element, orifice plates offer advantages such as simple structure, ease of processing, low manufacturing cost, and convenient installation. Under the premise of meeting process requirements, using orifice plates instead of regulating valves to limit flow or reduce pressure can significantly reduce investment and operation and maintenance costs. Depending on process requirements, orifice plates can be used to: limit flow, reduce pressure, and simultaneously limit flow and reduce pressure. Orifice plates can be classified according to the number of orifices (single-hole orifice plates and multi-hole orifice plates) and according to the number of plates on the pipeline (single-stage orifice plates and multi-stage orifice plates).

[0003] Currently, most industries use the steps outlined in the national standard "HG / T 20570.15-95 Installation of Orifice Plates for Pipelines" (hereinafter referred to as the standard) for designing and calculating orifice plates. However, the calculation methods described above require consulting the curves provided in the standard to roughly determine the orifice diameter, which prevents automatic calculation and results in large calculation errors and low efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a parameter design method and apparatus for a multi-stage flow-limiting orifice plate based on pipeline transportation, so as to alleviate the technical problems of large calculation error and low calculation efficiency in the prior art.

[0005] In a first aspect, embodiments of the present invention provide a parameter design method for a multi-stage flow-limiting orifice plate based on pipeline transportation, comprising: constructing a multi-stage flow-limiting orifice plate parameter generation model based on a pre-generated basic parameter relationship model of the flow-limiting orifice plate and an orifice plate diameter calculation model; the basic parameters of the flow-limiting orifice plate include: Reynolds number, orifice plate flow coefficient, and orifice diameter ratio; using the multi-stage flow-limiting orifice plate parameter generation model, determining the design parameters of each stage of the flow-limiting orifice plate; and setting the flow-limiting orifice plates of each stage of the throttling element in the pipeline according to the design parameters of each stage of the flow-limiting orifice plate, thereby realizing the flow restriction of the medium during pipeline transportation.

[0006] In some optional implementations, a multi-stage flow-limiting orifice plate parameter generation model is constructed based on a pre-generated basic parameter relationship model and orifice plate diameter calculation model. This includes: determining a univariate quadratic function representing the basic parameter relationship model of the flow-limiting orifice plate; determining an orifice diameter calculation function representing the orifice plate diameter calculation model; and determining a set of equations to represent the multi-stage flow-limiting orifice plate parameter generation model based on the aforementioned univariate quadratic function and the aforementioned orifice diameter calculation function.

[0007] In some optional implementations, the aforementioned determination of the basic parameter relationship model of the flow-limiting orifice plate includes: converting the pre-acquired basic parameter curve relationship diagram of the flow-limiting orifice plate into a basic parameter relationship table of the flow-limiting orifice plate; the basic parameter curve relationship diagram of the flow-limiting orifice plate is used to represent the correspondence between Reynolds value, orifice plate flow coefficient value, and orifice diameter ratio value; each of the aforementioned Reynolds value, orifice plate flow coefficient value, and orifice diameter ratio corresponds one-to-one in the aforementioned basic parameter relationship table of the flow-limiting orifice plate; fitting the data in the aforementioned basic parameter relationship table of the flow-limiting orifice plate using the least squares method to generate the basic parameter relationship model of the flow-limiting orifice plate; the aforementioned basic parameter relationship model of the flow-limiting orifice plate is a basic quadratic function with orifice diameter ratio as independent variable and orifice plate flow coefficient as dependent variable.

[0008] In some optional implementations, the above-mentioned construction of a multi-level flow-limiting orifice plate parameter generation model based on a pre-generated orifice plate basic parameter relationship model and orifice plate diameter calculation model further includes: determining the deformation coefficient according to a pre-obtained orifice plate diameter calculation formula; the orifice plate diameter calculation formula is as follows:

[0009]

[0010] Where W is the mass flow rate of the fluid; C is the orifice plate flow coefficient; d0 is the orifice plate diameter; P1 is the pressure before the orifice plate; P2 is the pressure after the orifice plate; M is the relative molecular mass of the fluid; Z is the compressibility coefficient; T is the fluid temperature before the orifice plate; and k is the adiabatic index. Based on the orifice plate flow coefficient, the orifice diameter ratio, and the above deformation coefficients, the orifice diameter calculation function is determined. Based on the above orifice diameter calculation function, the orifice plate diameter calculation model is determined. The above orifice plate diameter calculation model includes: the orifice diameter calculation function, the orifice plate number calculation function, and the pressure calculation function before and after each orifice plate stage.

[0011] In some optional implementations, the design parameters of each level of the flow-limiting orifice plate are determined using the aforementioned multi-level flow-limiting orifice plate parameter generation model. This includes: inputting conditional data into the aforementioned multi-level flow-limiting orifice plate parameter generation model and outputting the design parameters of each level of the flow-limiting orifice plate; the aforementioned conditional data includes: medium data, pipeline data, and target pressure data before and after pressure reduction; the aforementioned design parameters of each level of the flow-limiting orifice plate include: the number of orifice plates, the pressure values ​​of each level of orifice plate before and after pressure reduction, the Reynolds number, the deformation coefficient of each level of orifice plate, the flow coefficient of each level of orifice plate, and the orifice diameter of each level of orifice plate.

[0012] In some optional implementations, conditional data is input into the multi-stage flow-limiting orifice plate parameter generation model, and design parameters for each stage of the flow-limiting orifice plate are output. This includes: inputting the aforementioned medium data, pipeline data, and target pressure data before and after pressure reduction into the multi-stage flow-limiting orifice plate parameter generation model; calculating and outputting the number of orifices using the orifice plate number calculation function in the orifice plate diameter calculation model; calculating and outputting the pressure values ​​before and after pressure reduction for each stage of the orifice plate using the pressure calculation function before and after each stage of the orifice plate in the orifice plate diameter calculation model; calculating and outputting the deformation coefficient of each stage of the orifice plate according to the pre-acquired orifice plate diameter calculation formula; determining the first constraint relationship curve of the orifice diameter calculation function in the orifice plate diameter calculation model based on the deformation coefficient of each stage of the orifice plate; determining the second constraint relationship curve of the quadratic function in the basic parameter relationship model of the flow-limiting orifice plate based on the pre-determined Reynolds number; and determining the flow coefficient of each stage of the orifice plate and the corresponding orifice diameter of each stage of the orifice plate according to the first constraint relationship curve and the second constraint relationship curve.

[0013] Secondly, embodiments of the present invention provide a parameter design device for a multi-stage flow-limiting orifice plate based on pipeline transportation, comprising: a model building module, used to construct a multi-stage flow-limiting orifice plate parameter generation model based on a pre-generated basic parameter relationship model of the flow-limiting orifice plate and an orifice plate diameter calculation model; the basic parameters of the flow-limiting orifice plate include: Reynolds number, orifice plate flow coefficient, and orifice diameter ratio; a design parameter determination module for each stage of the orifice plate, used to determine the design parameters of each stage of the flow-limiting orifice plate using the multi-stage flow-limiting orifice plate parameter generation model; and an application module, used to set the flow-limiting orifice plates of each stage of the throttling element in the pipeline according to the design parameters of each stage of the flow-limiting orifice plate, thereby realizing the flow restriction of the medium during pipeline transportation.

[0014] In some optional implementations, the above model building module further includes: a first determining module for determining a univariate quadratic function representing the relationship model of the basic parameters of the flow-limiting orifice plate; a second determining module for determining an orifice diameter calculation function representing the orifice diameter calculation model; and a third determining module for determining a set of equations representing the parameter generation model of the multi-stage flow-limiting orifice plate based on the above univariate quadratic function and the above orifice diameter calculation function.

[0015] Thirdly, embodiments of the present invention provide an electronic device, including a memory and a processor, wherein the memory stores a computer program that can run on the processor, and the processor executes the computer program to implement the steps of the method described in any of the first aspects above.

[0016] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing machine-executable instructions, which, when invoked and executed by a processor, cause the processor to perform the method described in any of the first aspects above.

[0017] This invention provides a parameter design method and apparatus for multi-stage flow-limiting orifice plates based on pipeline transportation. The method includes: firstly, constructing a multi-stage flow-limiting orifice plate parameter generation model based on a pre-generated basic parameter relationship model and orifice plate diameter calculation model; then, using the multi-stage flow-limiting orifice plate parameter generation model, determining the design parameters of each stage of the flow-limiting orifice plate; and finally, setting the flow-limiting orifice plates of each stage of the throttling element in the pipeline according to the design parameters, thereby realizing medium flow restriction during pipeline transportation. This solves the technical problems of large design errors and low calculation efficiency of existing orifice plate parameters, and achieves the technical effect of improving calculation accuracy and calculation efficiency. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A flowchart illustrating a parameter design method for a multi-stage flow-limiting orifice plate based on pipeline transportation, provided in an embodiment of the present invention;

[0020] Figure 2 A curve diagram of basic parameters of a flow-limiting orifice plate (“C-Re-d0 / D” relationship diagram) is provided for embodiments of the present invention;

[0021] Figure 3 The constraint curve diagram is provided in the parameter design method of a multi-stage flow-limiting orifice plate based on pipeline transportation in an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0025] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Some embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] As a throttling element, the flow-limiting orifice plate has advantages such as simple structure, easy processing, low manufacturing cost, and convenient installation. Under the premise of meeting process requirements, using a flow-limiting orifice plate instead of a regulating valve to limit flow or reduce pressure can significantly reduce investment and operation and maintenance costs. Currently, the industry mostly adopts the steps outlined in the national standard for the design calculation of flow-limiting orifice plates, including: (Step 1) Calculating the number of plates based on the required inlet and outlet pressure drop; (Step 2) Calculating the pressures before and after each stage of the orifice plate; (Step 3) Calculating the orifice diameter of each stage of the orifice plate.

[0027] The following formula is used in the calculation of the third step:

[0028]

[0029] In the formula, W is the mass flow rate of the fluid; C is the orifice plate flow coefficient; d0 is the orifice plate diameter; P1 is the pressure before the orifice plate; P2 is the pressure after the orifice plate; M is the relative molecular mass of the fluid; Z is the compressibility coefficient; T is the fluid temperature before the orifice plate; and k is the adiabatic index. As shown in Formula 1, to determine the orifice plate diameter d0, the orifice plate flow coefficient C needs to be determined first. C is determined by the Reynolds number Re and the orifice diameter ratio (d0 / D). The usual practice is to initially set a value for C, iteratively calculate the orifice diameter d0, and then look up the value of C from the "C-Re-d0 / D" relationship diagram based on the orifice diameter ratio (d0 / D) and the Re value. The deviation between the calculated value and the looked-up value is observed to determine whether to repeat the calculation. The fundamental reason why this method cannot achieve automatic calculation is that it generates an equation containing two unknowns: the orifice diameter d0 and the flow coefficient C. Since the number of unknowns exceeds the number of equations, it cannot be solved directly. The orifice diameter can only be roughly determined by referring to the curves provided in the standard. Therefore, this method has large calculation errors and low efficiency.

[0030] Based on this, embodiments of the present invention provide a parameter design method and apparatus for a multi-stage flow-limiting orifice plate based on pipeline transportation, in order to solve the technical problems of large parameter design errors and low calculation efficiency of existing orifice plates.

[0031] To facilitate understanding of this embodiment, a parameter design method for a multi-stage flow-limiting orifice plate based on pipeline transportation, as disclosed in this embodiment of the invention, will first be described in detail. (See [link to relevant documentation]). Figure 1 The diagram shows a parameter design method for a multi-stage flow-limiting orifice plate based on pipeline transportation. This method can be executed by electronic equipment and mainly includes the following steps S110 to S130:

[0032] S110: Based on the pre-generated basic parameter relationship model of the flow-limiting orifice plate and the orifice plate diameter calculation model, a multi-level flow-limiting orifice plate parameter generation model is constructed; the basic parameters of the flow-limiting orifice plate include: Reynolds number, orifice plate flow coefficient, and orifice diameter ratio.

[0033] The construction of the multi-stage flow-limiting orifice plate parameter generation model can be achieved through the following steps: First, determine the univariate quadratic function representing the basic parameter relationship model of the flow-limiting orifice plate; then, determine the orifice diameter calculation function representing the orifice diameter calculation model; and finally, based on the univariate quadratic function and the orifice diameter calculation function, determine the set of equations used to represent the multi-stage flow-limiting orifice plate parameter generation model.

[0034] In one embodiment, the pre-generated model of the basic parameters of the flow-limiting orifice plate can be obtained from a pre-acquired curve diagram of the basic parameters of the flow-limiting orifice plate. This curve diagram represents the correspondence between the Reynolds number, the orifice plate flow coefficient, and the orifice diameter ratio. Typically, the curve diagram of the basic parameters of the flow-limiting orifice plate can be (e.g.,...) Figure 2 The “C-Re-d0 / D” relationship diagram shown below relates to the following basic parameters of the flow-limiting orifice plate: orifice plate flow coefficient C, Reynolds number Re, and orifice ratio d0 / D. This diagram can be obtained by referring to the standard appendix.

[0035] In this embodiment, the basic parameter curve relationship diagram of the flow-limiting orifice plate can be transformed into a basic parameter relationship table of the flow-limiting orifice plate. Then, the data in the basic parameter relationship table of the flow-limiting orifice plate can be fitted using the least squares method to generate a basic parameter relationship model of the flow-limiting orifice plate.

[0036] Among them, each Reynolds value, orifice plate flow coefficient value, and orifice diameter ratio value corresponds one-to-one in the basic parameter relationship table of the flow-limiting orifice plate; the basic parameter relationship model of the flow-limiting orifice plate is a quadratic function with orifice diameter ratio as independent variable and orifice plate flow coefficient as dependent variable.

[0037] To facilitate program calls, you can first... Figure 2Representative points on the curve are extracted and converted into a data table. The first row of the table contains the d0 / D value, the first column contains the Reynolds number Re, and the data in the center of the table contains the flow coefficient C. In other words, this data table contains three dimensions: Re, C, and d0 / D. At a specified Reynolds number, a functional relationship between C and d0 / D can be fitted using the data table, which is a quadratic function corresponding to the basic parameter relationship model of the flow-limiting orifice plate.

[0038] As a specific example, a detailed example of the basic parameter relationship table for a flow-limiting orifice plate is shown in Table 1.

[0039] Table 1 - Re, C, d0 / D Relationship Table

[0040]

[0041] In the specific example, the Reynolds number is a constant value, such as Re = 10. 6 For example, the following data can be extracted from Table 1 to form Table 2:

[0042] Table 2 - Re is 10 6 Data at time

[0043] C 0.58 0.6 0.61 0.615 0.625 0.635 0.65 0.67 0.69 0.72 0.765

[0044] Plotting the data from Table 2 on a Cartesian coordinate system yields a scatter plot approximating a parabola. Next, data fitting techniques are used to fit the discrete data points into a continuous curve, making it a continuous equation.

[0045] In this embodiment, the least squares method can be used to fit the data in Table 2 to generate a basic parameter relationship model for the flow-limiting orifice plate. As a mathematical optimization method, the goal of the least squares method is to minimize the sum of squared residuals between the fitted values ​​and the true values. Its objective function is expressed as:

[0046]

[0047] Where, x i The x-coordinate of each discrete point is y. i is the ordinate of each discrete point, and f is the fitted function.

[0048] After fitting, based on the data in Table 2, a quadratic function with orifice ratio as the independent variable and orifice plate flow coefficient as the dependent variable can be obtained:

[0049] y=0.620857-0.259317x+0.528565x 2 ;(Formula 2)

[0050] The independent variable x is the orifice ratio d0 / D, and the dependent variable y is the orifice plate flow coefficient C.

[0051] In another embodiment, the orifice plate aperture calculation model can be determined by an aperture calculation function, and determining the aperture calculation function may include the following steps:

[0052] First, the deformation coefficient is determined based on the pre-obtained orifice diameter calculation formula; the orifice diameter calculation formula is as follows:

[0053]

[0054] Where W is the mass flow rate of the fluid; C is the orifice plate flow coefficient; d0 is the orifice plate diameter; P1 is the pressure before the orifice plate; P2 is the pressure after the orifice plate; M is the relative molecular mass of the fluid; Z is the compressibility coefficient; T is the fluid temperature before the orifice plate; and k is the adiabatic index.

[0055] For a specific instance, the values ​​of all letters in (Equation 1) except for C and d0 are known, so (Equation 1) can be rewritten as:

[0056]

[0057] Here, d0 / D is treated as a whole (orifice ratio), where D is the pipe inner diameter, d0 is the orifice diameter, C is the orifice flow coefficient, and K is the deformation coefficient.

[0058] Then, based on the orifice plate flow coefficient, orifice ratio, and deformation coefficient, the orifice diameter calculation function is determined. That is, the orifice diameter calculation function uses the orifice plate flow coefficient and orifice ratio as unknowns and the deformation coefficient as knowns.

[0059] In this embodiment, a plot is drawn with d0 / D as the horizontal axis and C as the vertical axis to obtain the constraint relationship between these two quantities, see [link to plot]. Figure 3 As shown in part (A). The task of orifice calculation is to find a point on this curve to obtain a suitable combination of flow coefficient and orifice size. Currently, one equation contains two unknowns, and it is also necessary to combine... Figure 2 Only then can the values ​​of the flow coefficient and the orifice diameter be determined. In this embodiment, formulas 2 and 3 are combined and solved simultaneously to obtain the value of the orifice diameter d0.

[0060] Specifically, the graphs of the functions in Formula 2 and Formula 3 can be plotted on the same coordinate system, and the intersection of the two curves represents the most suitable values ​​for d0 / D and C. (See also...) Figure 3As shown in section (B), that is, taking d0 / D as the variable x and C as the variable y in formula 3, formula 3 can be rewritten as: y*x² = 0.0637637; solving this equation simultaneously with formula 2, we get x = 0.328, y = 0.593, that is, d0 / D = 0.328, C = 0.593. Therefore, we get d0 = xD = 0.328 * 0.0381 = 0.0125m. Experiments show that the true solution for this example is d0 = 12.4mm, and the relative deviation between the aperture result calculated using the method in this embodiment and the actual value is only 0.8%.

[0061] The orifice plate orifice diameter calculation model is determined based on the orifice diameter calculation function; the orifice plate orifice diameter calculation model includes: orifice diameter calculation function, orifice number calculation function, and pressure calculation function before and after each orifice plate.

[0062] Among them, the orifice plate number calculation function is used to determine the total number of plates based on the pressure values ​​before and after the orifice plate; the pressure calculation function before and after each orifice plate is used to calculate the orifice plate pressure of each stage based on the pressure values ​​before and after the orifice plate.

[0063] S120: Use the parameters of the multi-stage flow-limiting orifice plate to generate a model and determine the design parameters of each stage of the flow-limiting orifice plate;

[0064] S130: Based on the design parameters of each level of flow-limiting orifice plate, set the flow-limiting orifice plates of each level of the throttling element in the pipeline to achieve medium flow restriction during pipeline transportation.

[0065] In one embodiment, the step of determining the design parameters of each level of the flow-limiting orifice plate using the multi-level flow-limiting orifice plate parameter generation model in S120 includes: inputting conditional data into the multi-level flow-limiting orifice plate parameter generation model and outputting the design parameters of each level of the flow-limiting orifice plate.

[0066] The conditional data includes: medium data, pipeline data, and target pressure data before and after pressure reduction; the design parameters of each level of flow-limiting orifice plate include: number of orifice plates, pressure values ​​before and after pressure reduction of each level of orifice plate, Reynolds number, deformation coefficient of each level of orifice plate, flow coefficient of each level of orifice plate, and orifice diameter of each level of orifice plate.

[0067] In one embodiment, the above-mentioned input of conditional data to the multi-stage flow-limiting orifice plate parameter generation model and output of design parameters for each stage of the flow-limiting orifice plate includes:

[0068] (1) Input medium data, pipeline data and target pressure data before and after pressure reduction into the multi-stage flow-limiting orifice plate parameter generation model;

[0069] The medium data can be relevant data of the medium (such as gas or steam) that is subject to flow restriction during pipeline transportation in this embodiment, such as the fluid's mass flow rate W, relative molecular mass M, etc. Pipeline data can include: compressibility coefficient Z, fluid temperature T before the orifice plate, adiabatic index k, pipe dimensions, etc. The target pressure data before and after pressure reduction can include inlet and outlet pressure data, etc.

[0070] (2) Calculate and output the number of orifices using the orifice number calculation function in the orifice diameter calculation model;

[0071] (3) Calculate and output the pressure values ​​before and after pressure reduction of each orifice plate using the pressure calculation function before and after each orifice plate in the orifice plate diameter calculation model;

[0072] (4) Calculate and output the deformation coefficient of each orifice plate according to the pre-obtained orifice plate diameter calculation formula;

[0073] (5) Based on the deformation coefficient of each orifice plate, determine the first constraint relationship curve of the orifice plate orifice diameter calculation function in the orifice plate orifice diameter calculation model; that is, the function relationship curve corresponding to Formula 3.

[0074] (6) Based on the predetermined Reynolds number, determine the second constraint relationship curve of the quadratic function in the basic parameter relationship model of the flow-limiting orifice plate; that is, the function relationship curve corresponding to Formula 2.

[0075] (7) Determine the flow coefficient of each orifice plate and the corresponding orifice diameter based on the first constraint curve and the second constraint curve. Plot the function graphs in Formula 2 and Formula 3 on the same coordinate system. The intersection of the two curves is the most suitable value of d0 / D and C.

[0076] The above calculation process will be fully described below with reference to a specific embodiment.

[0077] Example: A stream of exhaust gas is depressurized by an orifice plate and then sent to the fuel gas pipeline. The gas flow rate is 3466 kg / h, the absolute gas pressure is 10.3 MPa, the temperature is 57°C, and the gas viscosity before depressurization is 1.305 × 10⁻⁶. -5 Given that the absolute pressure of the gas after pressure reduction is 2.0 MPa·s and the inner diameter of the pipe before pressure reduction is D = 38.1 mm, calculate the size of the flow-limiting orifice plate.

[0078] The calculation steps are as follows:

[0079] (1) Calculate the total number of boards;

[0080] n=-3.85lg(P2 / P1)=-3.85lg(2.0 / 10.3)≈3.

[0081] (2) Calculate the pressure at each level;

[0082] According to P m =(P2 / P1) 1 / n P m-1 The calculated pressure levels for the four levels are 10.3 MPa, 5.96 MPa, 3.45 MPa, and 2.0 MPa.

[0083] (3) Calculate the aperture of the first plate; the inlet and outlet pressures of the first plate are 10.3 MPa and 5.96 MPa, respectively. Substitute the known data into Formula 1 and simplify to obtain: d0 2 C = 9.256 × 10 -5 Based on the above method, combined with Formulas 2 and 3, the orifice diameter d0 = 0.0125 m was calculated. The calculation results for the three-stage orifice plate are shown in Table 3.

[0084] Table 3 - Calculation Results of Three-Stage Orifice Plates

[0085]

[0086]

[0087] This application provides a parameter design method for multi-stage flow-limiting orifice plates based on pipeline transportation. First, a multi-stage flow-limiting orifice plate parameter generation model is constructed based on a pre-generated basic parameter relationship model and orifice plate diameter calculation model. Then, the design parameters of each stage of the flow-limiting orifice plate are determined using the multi-stage flow-limiting orifice plate parameter generation model. Finally, the flow-limiting orifice plates of each stage of the throttling element in the pipeline are set according to the design parameters, thereby realizing the flow restriction of the medium during pipeline transportation. This solves the technical problems of large design errors and low calculation efficiency of existing orifice plate parameters, and achieves the technical effect of improving calculation accuracy and calculation efficiency.

[0088] Applying the method of this application embodiment to the field of engineering construction and design has the following advantages compared with traditional practices: designers do not need to consult charts; this method does not involve trial and error or iterative calculations, but is all simple unidirectional calculations, and each step of the processing flow can be implemented by computer programming; the calculation accuracy is high, and the calculation results obtained by using this method can meet the design requirements of engineering projects.

[0089] Furthermore, embodiments of the present invention also provide a parameter design device for a multi-stage flow-limiting orifice plate based on pipeline transportation, the device comprising:

[0090] The model building module is used to construct a multi-level flow-limiting orifice plate parameter generation model based on a pre-generated basic parameter relationship model of the flow-limiting orifice plate and an orifice plate diameter calculation model. The basic parameters of the flow-limiting orifice plate include: Reynolds number, orifice plate flow coefficient, and orifice diameter ratio.

[0091] The module for determining the design parameters of each orifice plate is used to generate a model using the parameters of the multi-stage flow-limiting orifice plates to determine the design parameters of each stage of the flow-limiting orifice plate.

[0092] The application module is used to set the flow-limiting orifice plates of each level of the throttling element in the pipeline according to the design parameters of each level of flow-limiting orifice plates, thereby realizing the flow restriction of the medium during pipeline transportation.

[0093] In one embodiment, the model building module further includes:

[0094] The first determining module is used to determine the univariate quadratic function representing the relationship model of the basic parameters of the flow-limiting orifice plate;

[0095] The second determining module is used to determine the aperture calculation function representing the orifice plate aperture calculation model;

[0096] The third determining module is used to determine the set of equations representing the parameter generation model of the multi-stage flow-limiting orifice plate based on the quadratic function and the orifice calculation function.

[0097] This invention provides a parameter design method and apparatus for multi-stage flow-limiting orifice plates based on pipeline transportation. The method includes: firstly, constructing a multi-stage flow-limiting orifice plate parameter generation model based on a pre-generated basic parameter relationship model and orifice plate diameter calculation model; then, using the multi-stage flow-limiting orifice plate parameter generation model, determining the design parameters of each stage of the flow-limiting orifice plate; and finally, setting the flow-limiting orifice plates of each stage of the throttling element in the pipeline according to the design parameters, thereby realizing medium flow restriction during pipeline transportation. This solves the technical problems of large design errors and low calculation efficiency of existing orifice plate parameters, and achieves the technical effect of improving calculation accuracy and calculation efficiency.

[0098] The parameter design device for a multi-stage flow-limiting orifice plate based on pipeline transportation provided in this application embodiment can be specific hardware on the device or software or firmware installed on the device. The implementation principle and technical effects of the device provided in this application embodiment are the same as those in the foregoing method embodiments. For the sake of brevity, any parts not mentioned in the device embodiment can be referred to the corresponding content in the foregoing method embodiments. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can all be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. The parameter design device for a multi-stage flow-limiting orifice plate based on pipeline transportation provided in this application embodiment has the same technical features as the parameter design method for a multi-stage flow-limiting orifice plate based on pipeline transportation provided in the foregoing embodiments, and therefore can solve the same technical problems and achieve the same technical effects.

[0099] This application also provides an electronic device, specifically, the electronic device includes a processor and a storage device; the storage device stores a computer program, and the computer program, when run by the processor, executes the method described in any of the above embodiments.

[0100] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device 400 includes: a processor 40, a memory 41, a bus 42, and a communication interface 43. The processor 40, the communication interface 43, and the memory 41 are connected through the bus 42. The processor 40 is used to execute executable modules, such as computer programs, stored in the memory 41.

[0101] The memory 41 may include high-speed random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 43 (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc.

[0102] Bus 42 can be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 4 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.

[0103] The memory 41 is used to store programs. After receiving an execution instruction, the processor 40 executes the program. The method executed by the apparatus of the process definition disclosed in any of the foregoing embodiments of the present invention can be applied to the processor 40 or implemented by the processor 40.

[0104] Processor 40 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of processor 40 or by instructions in software form. Processor 40 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this invention can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 41. The processor 40 reads the information in memory 41 and, in conjunction with its hardware, completes the steps of the above method.

[0105] Corresponding to the above method, this application embodiment also provides a computer-readable storage medium storing machine-executable instructions. When the machine-executable instructions are called and run by a processor, the machine-executable instructions cause the processor to perform the steps of the above method.

[0106] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0107] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0108] In addition, the functional units in the embodiments provided in this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0109] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, electronic device, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0110] It should be noted that similar reference numerals and letters in the accompanying drawings indicate similar items. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings. In addition, the terms "first," "second," "third," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A parameter design method for a multi-stage flow-limiting orifice plate based on pipeline transportation, characterized in that, include: Based on the pre-generated basic parameter relationship model of the flow-limiting orifice plate and the orifice plate diameter calculation model, a multi-level flow-limiting orifice plate parameter generation model is constructed. The basic parameters of the flow-limiting orifice plate include: Reynolds number, orifice plate flow coefficient, and orifice ratio; The design parameters of each stage of the flow-limiting orifice plate are determined using the multi-stage flow-limiting orifice plate parameter generation model. Based on the design parameters of the various levels of flow-limiting orifice plates, the various levels of flow-limiting orifice plates of the throttling element in the pipeline are set to achieve medium flow restriction during pipeline transportation. Specifically, based on the pre-generated basic parameter relationship model of the flow-limiting orifice plate and the orifice plate diameter calculation model, a multi-level flow-limiting orifice plate parameter generation model is constructed, including: determining a univariate quadratic function representing the basic parameter relationship model of the flow-limiting orifice plate; determining a diameter calculation function representing the orifice plate diameter calculation model; and determining a set of equations representing the multi-level flow-limiting orifice plate parameter generation model based on the univariate quadratic function and the diameter calculation function. Determining a univariate quadratic function representing the relationship model of the basic parameters of a flow-limiting orifice plate includes: converting a pre-acquired curve relationship diagram of the basic parameters of the flow-limiting orifice plate into a table of basic parameters of the flow-limiting orifice plate; the curve relationship diagram of the basic parameters of the flow-limiting orifice plate is used to represent the correspondence between Reynolds number values, orifice plate flow coefficient values, and orifice diameter ratio values; each of the Reynolds number values, orifice plate flow coefficient values, and orifice diameter ratio values ​​corresponds one-to-one with the data in the table of basic parameters of the flow-limiting orifice plate; fitting the data in the table of basic parameters of the flow-limiting orifice plate using the least squares method to generate a model of the basic parameters of the flow-limiting orifice plate; the model of the basic parameters of the flow-limiting orifice plate is a univariate quadratic function with orifice diameter ratio as the independent variable and orifice plate flow coefficient as the dependent variable. Based on the pre-generated basic parameter relationship model of the flow-limiting orifice plate and the orifice plate diameter calculation model, a multi-level flow-limiting orifice plate parameter generation model is constructed, which also includes: The deformation coefficient is determined based on the pre-obtained orifice diameter calculation formula; the orifice diameter calculation formula is as follows: ； Where W is the mass flow rate of the fluid; C is the orifice plate flow coefficient; d0 is the orifice plate diameter; P1 is the pressure before the orifice plate; P2 is the pressure after the orifice plate; M is the relative molecular mass of the fluid; Z is the compressibility coefficient; T is the fluid temperature before the orifice plate; and k is the adiabatic index. The orifice diameter calculation function is determined based on the orifice plate flow coefficient, orifice ratio, and deformation coefficient. The orifice plate orifice diameter calculation model is determined based on the orifice diameter calculation function; the orifice plate orifice diameter calculation model includes: orifice diameter calculation function, orifice plate number calculation function, and pressure calculation function before and after each orifice plate.

2. The parameter design method for a multi-stage flow-limiting orifice plate based on pipeline transportation according to claim 1, characterized in that, Using the multi-stage flow-limiting orifice plate parameter generation model, the design parameters of each stage of the flow-limiting orifice plate are determined, including: Input conditional data into the multi-stage flow-limiting orifice plate parameter generation model and output the design parameters of each stage of the flow-limiting orifice plate; the conditional data includes: medium data, pipeline data, and target pressure data before and after pressure reduction; the design parameters of each stage of the flow-limiting orifice plate include: number of orifice plates, pressure values ​​of each stage of the orifice plate before and after pressure reduction, Reynolds number, deformation coefficient of each stage of the orifice plate, flow coefficient of each stage of the orifice plate, and orifice diameter of each stage of the orifice plate.

3. The parameter design method for a multi-stage flow-limiting orifice plate based on pipeline transportation according to claim 2, characterized in that, Input conditional data into the multi-stage flow-limiting orifice plate parameter generation model, and output the design parameters of each stage of the flow-limiting orifice plate, including: Input the medium data, the pipeline data, and the target pressure data before and after pressure reduction into the multi-stage flow-limiting orifice plate parameter generation model; The number of orifices is calculated and output using the orifice number calculation function in the orifice diameter calculation model. The pressure values ​​before and after pressure reduction of each orifice plate are calculated and output using the pressure calculation function before and after each orifice plate stage in the orifice plate diameter calculation model. Based on the pre-obtained orifice plate diameter calculation formula, calculate and output the deformation coefficient of each orifice plate; Based on the deformation coefficients of the orifice plates at each level, the first constraint relationship curve of the orifice plate orifice diameter calculation function in the orifice plate orifice diameter calculation model is determined; Based on a predetermined Reynolds number, the second constraint relationship curve of the univariate quadratic function in the basic parameter relationship model of the flow-limiting orifice plate is determined; Based on the first constraint curve and the second constraint curve, the flow coefficient of each orifice plate and the corresponding orifice diameter of each orifice plate are determined.

4. A parameter design device for a multi-stage flow-limiting orifice plate based on pipeline transportation, characterized in that, include: The model building module is used to construct a multi-level flow-limiting orifice plate parameter generation model based on a pre-generated basic parameter relationship model of the flow-limiting orifice plate and the orifice plate diameter calculation model. The basic parameters of the flow-limiting orifice plate include: Reynolds number, orifice plate flow coefficient, and orifice ratio; The orifice plate design parameter determination module is used to determine the design parameters of each level of the orifice plate by using the multi-level flow-limiting orifice plate parameter generation model. The application module is used to set the flow limiting orifice plates of each level of the throttling element in the pipeline according to the design parameters of the flow limiting orifice plates of each level, so as to realize the flow limiting of the medium during the pipeline transportation process; Also includes: The first determining module is used to determine the univariate quadratic function representing the relationship model of the basic parameters of the flow-limiting orifice plate; The second determining module is used to determine the aperture calculation function representing the orifice plate aperture calculation model; The third determining module is used to determine the set of equations representing the multi-stage flow-limiting orifice plate parameter generation model based on the quadratic function and the aperture calculation function. The determination of the univariate quadratic function representing the relationship model of the basic parameters of the flow-limiting orifice plate includes: converting the pre-acquired curve relationship diagram of the basic parameters of the flow-limiting orifice plate into a table of basic parameters of the flow-limiting orifice plate; the curve relationship diagram of the basic parameters of the flow-limiting orifice plate is used to represent the correspondence between Reynolds number, orifice plate flow coefficient value, and orifice diameter ratio; each of the Reynolds number, orifice plate flow coefficient value, and orifice diameter ratio corresponds one-to-one in the table of basic parameters of the flow-limiting orifice plate; fitting the data in the table of basic parameters of the flow-limiting orifice plate using the least squares method to generate the relationship model of the basic parameters of the flow-limiting orifice plate; the relationship model of the basic parameters of the flow-limiting orifice plate is a univariate quadratic function with orifice diameter ratio as independent variable and orifice plate flow coefficient as dependent variable; Based on the pre-generated basic parameter relationship model of the flow-limiting orifice plate and the orifice plate diameter calculation model, a multi-level flow-limiting orifice plate parameter generation model is constructed, which also includes: The deformation coefficient is determined based on the pre-obtained orifice diameter calculation formula; the orifice diameter calculation formula is as follows: ； Where W is the mass flow rate of the fluid; C is the orifice plate flow coefficient; d0 is the orifice plate diameter; P1 is the pressure before the orifice plate; P2 is the pressure after the orifice plate; M is the relative molecular mass of the fluid; Z is the compressibility coefficient; T is the fluid temperature before the orifice plate; and k is the adiabatic index. The orifice diameter calculation function is determined based on the orifice plate flow coefficient, orifice ratio, and deformation coefficient. The orifice plate orifice diameter calculation model is determined based on the orifice diameter calculation function; the orifice plate orifice diameter calculation model includes: orifice diameter calculation function, orifice plate number calculation function, and pressure calculation function before and after each orifice plate.

5. An electronic device, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method described in any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions that, when invoked and executed by a processor, cause the processor to perform the method according to any one of claims 1 to 3.

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