Parameter design method and device for multistage restriction orifice based on pipeline transportation

Abstract

The invention provides a parameter design method and device for a multistage restriction orifice based on pipeline transportation, and relates to the technical field of pipeline transportation, the method comprises the following steps: firstly, constructing a parameter generation model of the multistage restriction orifice based on a pre-generated restriction orifice basic parameter relation model and an orifice aperture calculation model; the method comprises the steps that firstly, a multi-stage flow limiting orifice plate parameter generation model is utilized, design parameters of all stages of flow limiting orifice plates are determined, and finally all stages of flow limiting orifice plates of a throttling element in a pipeline are set according to the design parameters, so that medium flow limiting in the pipeline transportation process is achieved, and the technical problems that existing orifice plate parameter design errors are large and calculation efficiency is low are solved. The technical effect of improving the calculation precision and the calculation efficiency is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline transportation, and in particular to a parameter design method and device of a multi-stage flow-limiting orifice plate based on pipeline transportation. Background Art

[0002] The petrochemical industry and the nuclear industry basically use pipeline transportation. Pipeline transportation often uses flow-limiting orifice plates to limit the flow of the medium, thereby reducing the erosion of the fluid on valves and other pipe fittings. As a throttling element, the flow-limiting orifice plate has the advantages of simple structure, easy processing, low manufacturing cost, and convenient installation. On the premise of meeting the process requirements, the use of flow-limiting orifice plates instead of regulating valves to limit the flow or reduce the pressure can greatly reduce investment and operating maintenance costs. According to the process requirements, the flow-limiting orifice plate can be used to: limit the flow, reduce the pressure, and limit the flow and reduce the pressure at the same time. The flow-limiting orifice plate can be divided into single-hole orifice plates and multi-hole orifice plates according to the number of openings; it can be divided into single-stage orifice plates and multi-stage orifice plates according to the number of plates on the pipeline.

[0003] At present, most industries use the steps introduced in the national standard "HG / T 20570.15-95 Pipeline Flow Limiting Orifice Setting" (hereinafter referred to as the standard) to design and calculate the flow limiting orifice. However, since the calculation method in the above steps requires consulting the curve chart provided in the standard to roughly determine the aperture, automatic calculation cannot be achieved, resulting in large calculation errors and low calculation efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a parameter design method and device 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 existing in the prior art.

[0005] In the first aspect, an embodiment of the present invention provides 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 flow limiting orifice plate basic parameter relationship model and an orifice plate aperture calculation model; the above-mentioned flow limiting orifice plate basic parameters include: Reynolds number, orifice plate flow coefficient, and aperture ratio; using the above-mentioned multi-stage flow limiting orifice plate parameter generation model, determining the design parameters of each stage of the flow limiting orifice plate; according to the design parameters of the above-mentioned flow limiting orifice plates at each stage, setting the flow limiting orifice plates of each stage of the throttling element in the pipeline, thereby realizing medium flow limitation during pipeline transportation.

[0006] In some optional implementations, a multi-stage flow limiting orifice parameter generation model is constructed based on a pre-generated flow limiting orifice basic parameter relationship model and an orifice aperture calculation model, including: determining a quadratic function representing the flow limiting orifice basic parameter relationship model; determining an aperture calculation function representing the orifice aperture calculation model; and determining a set of equations for representing the multi-stage flow limiting orifice parameter generation model based on the above quadratic function and the above aperture calculation function.

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

[0008] In some optional implementations, the multi-stage flow limiting orifice plate parameter generation model is constructed based on the pre-generated flow limiting orifice plate basic parameter relationship model and the orifice plate aperture calculation model, and further includes: determining the deformation coefficient according to the pre-acquired orifice plate aperture calculation formula; the orifice plate aperture calculation formula is:

[0009]

[0010] Wherein, W is the mass flow rate of the fluid; C is the orifice flow coefficient; d0 is the orifice diameter; P1 is the pressure before the orifice; P2 is the pressure after the orifice; M is the relative molecular mass of the fluid; Z is the compression coefficient; T is the temperature of the fluid before the orifice; k is the adiabatic index; based on the orifice flow coefficient, the aperture ratio and the above deformation coefficient, the aperture calculation function is determined; based on the above aperture calculation function, the orifice aperture calculation model is determined; the above orifice aperture calculation model includes: aperture calculation function, orifice number calculation function, and pressure calculation functions before and after each level of orifice.

[0011] In some optional implementations, the multi-stage flow limiting orifice plate parameter generation model is used to determine the design parameters of each stage of the flow limiting orifice plate, including: inputting conditional data into the multi-stage flow limiting orifice plate parameter generation model, and outputting the design parameters of each stage of the flow limiting orifice plate; the conditional data include: 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: the number of orifices, the pressure values ​​before and after pressure reduction of each stage of the orifice plate, the Reynolds number, the deformation coefficient of each stage of the orifice plate, the flow coefficient of each stage of the orifice plate, and the aperture of each stage of the orifice plate.

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

[0013] In the second aspect, an embodiment of the present invention provides a parameter design device for a multi-stage flow limiting orifice plate based on pipeline transportation, including: a model construction module, which is used to construct a multi-stage flow limiting orifice plate parameter generation model based on a pre-generated flow limiting orifice plate basic parameter relationship model and an orifice plate aperture calculation model; the above-mentioned flow limiting orifice plate basic parameters include: Reynolds number, orifice plate flow coefficient, aperture ratio; a module for determining the design parameters of each stage of the orifice plate, which is used to use the above-mentioned multi-stage flow limiting orifice plate parameter generation model to determine the design parameters of each stage of the flow limiting orifice plate; an application module, which is used to set the flow limiting orifice plates of each stage of the throttling element in the pipeline according to the design parameters of the above-mentioned flow limiting orifice plates at each stage, so as to realize the medium flow limitation during pipeline transportation.

[0014] In some optional implementations, the above-mentioned model construction module also includes: a first determination module, used to determine a quadratic function representing a basic parameter relationship model of a flow-limiting orifice; a second determination module, used to determine an aperture calculation function representing an orifice aperture calculation model; and a third determination module, used to determine a set of equations representing a multi-stage flow-limiting orifice parameter generation model based on the above-mentioned quadratic function and the above-mentioned aperture calculation function.

[0015] In a third aspect, an embodiment of the present invention provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, and when the processor executes the computer program, the steps of any one of the methods described in the first aspect are implemented.

[0016] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores machine-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions cause the processor to execute any method described in the first aspect above.

[0017] The present invention provides a parameter design method and device for a multi-stage flow-limiting orifice plate based on pipeline transportation. The method comprises: firstly, based on a pre-generated flow-limiting orifice plate basic parameter relationship model and an orifice plate aperture calculation model, a multi-stage flow-limiting orifice plate parameter generation model is constructed; then, the multi-stage flow-limiting orifice plate parameter generation model is used to determine the design parameters of each stage of the flow-limiting orifice plate; 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 medium flow limitation in the process of pipeline transportation, solving the technical problems of large error in existing orifice plate parameter design and low calculation efficiency, and achieving the technical effect of improving calculation accuracy and calculation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0020] Figure 2 A basic parameter curve relationship diagram of a flow limiting orifice plate ("C-Re-d0 / D" relationship diagram) provided in an embodiment of the present invention;

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

[0022] Figure 4 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. Some embodiments of the present invention are described in detail below in conjunction with the drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0026] As a throttling element, the flow limiting orifice plate has the advantages of simple structure, easy processing, low manufacturing cost, and convenient installation. Under the premise of meeting the process requirements, the flow limiting orifice plate is used instead of the regulating valve to limit the flow or reduce the pressure, which can greatly reduce the investment and operation and maintenance costs. At present, most industries use the steps introduced in the national standard to design and calculate the flow limiting orifice plate, including: (the first step) calculate the number of plates according to the requirements of the inlet and outlet pressure drop; (the second step) calculate the front and rear pressures of each level of orifice plate; (the third step) calculate the aperture of each level of orifice plate.

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

[0028]

[0029] Where W is the mass flow rate of the fluid; C is the orifice flow coefficient; d0 is the orifice diameter; P1 is the pressure before the orifice; P2 is the pressure after the orifice; M is the relative molecular mass of the fluid; Z is the compressibility coefficient; T is the temperature of the fluid before the orifice; k is the adiabatic index. It can be seen from (Formula 1) that in order to find the orifice diameter d0 of the flow-limiting orifice, it is necessary to first determine the orifice flow coefficient C, and C is determined by the Reynolds number Re and the aperture ratio (d0 / D). The usual practice is to first set a value for C, and then obtain the aperture d0 through iterative calculation, and then find the value of C from the "C-Re-d0 / D" relationship diagram based on the aperture ratio (d0 / D) and Re value, and observe the deviation between the calculated value and the searched value to decide 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 aperture d0 and the flow coefficient C. The number of unknowns is greater than the number of equations and cannot be solved directly. The aperture must be roughly determined by referring to the curve graph provided in the standard. Therefore, this method has large calculation errors and low efficiency.

[0030] Based on this, an embodiment of the present invention provides a parameter design method and device for a multi-stage flow limiting orifice plate based on pipeline transportation to solve the technical problems of large error and low calculation efficiency in existing orifice plate parameter design.

[0031] To facilitate understanding of this embodiment, firstly, a parameter design method of a multi-stage flow limiting orifice plate based on pipeline transportation disclosed in an embodiment of the present invention is described in detail, see Figure 1 The flowchart of a parameter design method of a multi-stage flow-limiting orifice plate based on pipeline transportation is shown. The method can be executed by an electronic device and mainly includes the following steps S110 to S130:

[0032] S110: constructing a multi-stage flow limiting orifice plate parameter generation model based on a pre-generated flow limiting orifice plate basic parameter relationship model and an orifice plate aperture calculation model; the flow limiting orifice plate basic parameters include: Reynolds number, orifice plate flow coefficient, and aperture ratio;

[0033] Among them, constructing a multi-stage flow-limiting orifice plate parameter generation model can be specifically achieved through the following steps, namely: first determine a quadratic function representing the basic parameter relationship model of the flow-limiting orifice plate; then determine the aperture calculation function representing the orifice plate aperture calculation model; and then determine a group of equations used to represent the multi-stage flow-limiting orifice plate parameter generation model based on the quadratic function and the aperture calculation function.

[0034] In one embodiment, the pre-generated flow limiting orifice basic parameter relationship model can be obtained by pre-acquired flow limiting orifice basic parameter curve relationship diagram. The flow limiting orifice basic parameter curve relationship diagram is used to represent the corresponding relationship between the Reynolds number, the orifice flow coefficient value and the aperture ratio value. Generally, the flow limiting orifice basic parameter curve relationship diagram can be (such as Figure 2 The "C-Re-d0 / D" relationship diagram (shown in the figure) involves the basic parameters of the flow limiting orifice plate: orifice plate flow coefficient C, Reynolds number Re, and aperture ratio d0 / D. This diagram can be obtained by referring to the standard appendix.

[0035] In this embodiment, the flow limiting orifice basic parameter relationship model can be generated by converting the above-mentioned flow limiting orifice basic parameter relationship curve diagram into a flow limiting orifice basic parameter relationship table, and then fitting the data in the flow limiting orifice basic parameter relationship table using the least squares method.

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

[0037] In order to facilitate the calculation program call, you can first Figure 2The representative points on the curve are extracted and converted into a data table. The first row of the table is the value of d0 / D, the first column is the value of the Reynolds number Re, and the data in the center of the table is the value of the flow coefficient C, that is, the data table contains three dimensions: Re, C, and d0 / D. Under the specified Reynolds number, a functional relationship of C~d0 / D can be fitted using the data table, that is, a quadratic function corresponding to the basic parameter relationship model of the flow limiting orifice.

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

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

[0040]

[0041] In a specific example, the Reynolds number is a certain value, Re = 10 6 For example, the following data in Table 2 can be sorted out from Table 1:

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

[0043] <![CDATA[d0 / D]]> 0.2 0.3 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 0.8 C 0.58 0.6 0.61 0.615 0.625 0.635 0.65 0.67 0.69 0.72 0.765

[0044] Plot the data in Table 2 in a rectangular coordinate system to obtain a scatter plot that approximates a parabola. Next, use data fitting technology 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 of the flow limiting orifice. As a mathematical optimization method, the goal of the least squares method is to minimize the sum of squares of the residuals between the fitted value and the true value, and its objective function is expressed as:

[0046]

[0047] Among them, x i is the horizontal coordinate of each discrete point, y i is the ordinate of each discrete point, and f is the fitted function.

[0048] After fitting, according to the data in Table 2, a quadratic function with aperture ratio as the independent variable and orifice 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 aperture ratio d0 / D, and the dependent variable y is the orifice flow coefficient C.

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

[0052] First, the deformation coefficient is determined according to the pre-acquired orifice plate aperture calculation formula; the orifice plate aperture calculation formula is:

[0053]

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

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

[0056]

[0057] Among them, d0 / D is treated as a whole (aperture ratio), D is the inner diameter of the pipe, d0 is the aperture of the orifice plate; C is the orifice plate flow coefficient; K is the deformation coefficient.

[0058] Then, based on the orifice plate flow coefficient, aperture ratio and deformation coefficient, the aperture calculation function is determined, that is, the orifice plate flow coefficient and aperture ratio are unknown quantities, and the deformation coefficient is a known quantity.

[0059] In this embodiment, a graph is drawn with d0 / D as the horizontal axis and C as the vertical axis to obtain the constraint relationship between the two quantities, see Figure 3 The task of aperture calculation is to find a point on this curve to obtain a suitable combination of flow coefficient and aperture. Figure 2 In order to determine the flow coefficient and the aperture value, in this embodiment, Formula 2 is combined with Formula 3 and the aperture value d0 is obtained by solving them jointly.

[0060] The function graphs in Formula 2 and Formula 3 can be plotted in the same coordinate system, and the intersection of the two curves is the most appropriate value of d0 / D and C. Figure 3As shown in part (B) of . That is to say, taking d0 / D in Formula 3 as variable x and C as variable y, Formula 3 can be rewritten as: y*x2=0.0637637; solving this formula together with Formula 2, we can get x=0.328, y=0.593, that is, d0 / D=0.328, C=0.593. Thus, we get d0=xD=0.328*0.0381=0.0125m. Experiments show that the true solution of 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 aperture calculation model is determined based on the aperture calculation function; the orifice plate aperture calculation model includes: an aperture calculation function, an orifice plate number calculation function, and a pressure calculation function before and after each level of orifice plates.

[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 plates; the orifice plate pressure calculation function at each level is used to calculate the orifice plate pressure at each level based on the pressure values ​​before and after the orifice plates.

[0063] S120: using a multi-stage flow limiting orifice plate parameter generation model to determine design parameters of each stage of the flow limiting orifice plate;

[0064] S130: Setting 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, thereby achieving flow limiting of the medium during pipeline transportation.

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

[0066] Among them, the conditional data include: medium data, pipeline data and target pressure data before and after pressure reduction; the design parameters of each level of flow limiting orifice plates include: the number of orifice plates, the pressure value before and after the pressure reduction of each level of orifice plates, the Reynolds number, the deformation coefficient of each level of orifice plates, the flow coefficient of each level of orifice plates, and the aperture of each level of orifice plates.

[0067] In one embodiment, the above-mentioned inputting condition data into the multi-stage flow limiting orifice plate parameter generation model and outputting the design parameters of the flow limiting orifice plates at each stage include:

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

[0069] The medium data may be the relevant data of the medium (such as gas, steam) for flow limiting in the pipeline transportation process implemented in this embodiment, such as the mass flow rate W of the fluid, the relative molecular mass M of the fluid, etc. The pipeline data may include the compression coefficient Z, the fluid temperature T before the orifice plate, the adiabatic index k, the pipeline size, etc. The target pressure data before and after the pressure reduction may include the pressure data of the inlet and outlet, etc.

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

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

[0072] (4) Calculate and output the deformation coefficients of the orifice plates at each level according to the orifice plate aperture calculation formula obtained in advance;

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

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

[0075] (7) According to the first constraint relationship curve and the second constraint relationship curve, the flow coefficient of each level of orifice plate and the corresponding aperture of each level of orifice plate are determined. The function graphs in Formula 2 and Formula 3 are plotted in the same coordinate system, and the intersection of the two curves is the most suitable value of d0 / D and C.

[0076] The above calculation process is fully described below in conjunction with a specific embodiment.

[0077] Example: A tail gas is depressurized by a perforated plate and then goes to the fuel gas network. The gas flow rate is 3466 kg / h, the absolute pressure of the gas is 10.3 MPa, the temperature is 57 ° C, and the gas viscosity before depressurization is 1.305 × 10 -5 MPa·s, the absolute pressure of the gas after decompression is 2.0MPa, the inner diameter of the pipe before decompression D=38.1mm, calculate the size of the flow limiting orifice.

[0078] The calculation steps are as follows:

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

[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 four-stage pressures are calculated to be 10.3MPa, 5.96MPa, 3.45MPa, and 2.0MPa.

[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 it to obtain: d0 2 C = 9.256 × 10 -5 According to the above method, combined with formula 2 and formula 3, the aperture d0 is calculated to be 0.0125m. The calculation results of the three-stage orifice plate are shown in Table 3.

[0084] Table 3 - Calculation results of three-stage orifice plate

[0085]

[0086]

[0087] The embodiment of the present application provides a parameter design method for a multi-stage flow limiting orifice plate based on pipeline transportation. First, based on a pre-generated flow limiting orifice basic parameter relationship model and an orifice aperture calculation model, a multi-stage flow limiting orifice plate parameter generation model is constructed; then, the multi-stage flow limiting orifice plate parameter generation model is used to determine the design parameters of each stage of the flow limiting orifice plate; 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 medium flow limitation during pipeline transportation, solving the technical problems of large errors and low calculation efficiency in existing orifice plate parameter design, and achieving the technical effect of improving calculation accuracy and calculation efficiency.

[0088] The method of the embodiment of the present application is applied to the field of engineering construction and design, which has the following advantages compared with traditional practices: designers do not need to consult charts; the method does not involve trial and error and iterative calculations, all of which are simple one-way calculations, and each link of the processing flow can be implemented through computer programming; the calculation accuracy is high, and the calculation results obtained using this method can meet the design requirements of the engineering project.

[0089] In addition, an embodiment of the present invention further provides a parameter design device for a multi-stage flow-limiting orifice plate based on pipeline transportation, the device comprising:

[0090] A model building module is used to build a multi-stage flow-limiting orifice plate parameter generation model based on a pre-generated flow-limiting orifice plate basic parameter relationship model and an orifice plate aperture calculation model; the flow-limiting orifice plate basic parameters include: Reynolds number, orifice plate flow coefficient, and aperture ratio;

[0091] A module for determining design parameters of orifice plates at each level, used to determine design parameters of orifice plates at each level by using a multi-level flow limiting orifice plate parameter generation model;

[0092] The application module is used to set the flow limiting orifice plates at various levels of the throttling element in the pipeline according to the design parameters of the flow limiting orifice plates at various levels, so as to realize the flow limiting of the medium during the pipeline transportation process.

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

[0094] A first determination module is used to determine a quadratic function representing a basic parameter relationship model of a flow limiting orifice plate;

[0095] A second determination module is used to determine an aperture calculation function representing an aperture calculation model of an orifice plate;

[0096] The third determination module is used to determine a set of equations for representing a parameter generation model of a multi-stage flow limiting orifice plate according to a quadratic function and an aperture calculation function.

[0097] The present invention provides a parameter design method and device for a multi-stage flow-limiting orifice plate based on pipeline transportation. The method comprises: firstly, based on a pre-generated flow-limiting orifice plate basic parameter relationship model and an orifice plate aperture calculation model, a multi-stage flow-limiting orifice plate parameter generation model is constructed; then, the multi-stage flow-limiting orifice plate parameter generation model is used to determine the design parameters of each stage of the flow-limiting orifice plate; 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 medium flow limitation in the process of pipeline transportation, solving the technical problems of large error in existing orifice plate parameter design and low calculation efficiency, and achieving the technical effect of improving calculation accuracy and calculation efficiency.

[0098] The parameter design device for the multi-stage flow-limiting orifice plate based on pipeline transportation provided in the embodiment of the present application can be specific hardware on the equipment or software or firmware installed on the equipment, etc. The implementation principle and technical effect of the device provided in the embodiment of the present application are the same as those of the aforementioned method embodiment. For the sake of brief description, the parts not mentioned in the device embodiment can refer to the corresponding contents in the aforementioned method embodiment. Technical personnel in the relevant field can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems, devices and units described above can all refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. The parameter design device for the multi-stage flow-limiting orifice plate based on pipeline transportation provided in the embodiment of the present application has the same technical features as the parameter design method for the multi-stage flow-limiting orifice plate based on pipeline transportation provided in the above embodiment, so it can also solve the same technical problems and achieve the same technical effects.

[0099] An embodiment of the present application further provides an electronic device. Specifically, the electronic device includes a processor and a storage device. The storage device stores a computer program, and when the computer program is executed by the processor, it executes the method described in any one of the above-mentioned embodiments.

[0100] Figure 4 A structural schematic diagram of an electronic device provided in an embodiment of the present application, the electronic device 400 includes: a processor 40, a memory 41, a bus 42 and a communication interface 43, wherein the processor 40, the communication interface 43 and the memory 41 are connected via the bus 42; the processor 40 is used to execute an executable module stored in the memory 41, such as a computer program.

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

[0102] The bus 42 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0103] Among them, the memory 41 is used to store programs, and the processor 40 executes the program after receiving the execution instruction. The method executed by the process definition device disclosed in any embodiment of the above-mentioned embodiment of the present invention can be applied to the processor 40 or implemented by the processor 40.

[0104] The processor 40 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 40. The above 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 gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiments of the present invention can be directly embodied as a hardware decoding processor to execute, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 41, and the processor 40 reads the information in the memory 41 and completes the steps of the above method in combination with its hardware.

[0105] Corresponding to the above method, an embodiment of the present application also provides a computer-readable storage medium, which stores machine-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to execute the steps of the above method.

[0106] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

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

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

[0109] If the functions are implemented in the form of 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 the present invention, in essence, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, electronic device, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0110] It should be noted that similar numbers and letters represent similar items in the accompanying drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood 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, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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 aperture calculation model, a multi-stage 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 aperture ratio; Determine the design parameters of the flow limiting orifice plates at each level by using the multi-level flow limiting orifice plate parameter generation model; According to the design parameters of the flow limiting orifice plates at each level, the flow limiting orifice plates at each level of the throttling element in the pipeline are set, so as to achieve medium flow limiting during pipeline transportation.

2. The parameter design method of the multi-stage flow limiting orifice plate based on pipeline transportation according to claim 1 is characterized in that: Based on the pre-generated limiting orifice basic parameter relationship model and orifice aperture calculation model, a multi-stage limiting orifice parameter generation model is constructed, including: Determine a quadratic function representing a basic parameter relationship model of a flow limiting orifice; Determine an aperture calculation function representing an aperture calculation model of an orifice plate; According to the one-variable quadratic function and the aperture calculation function, a set of equations for representing a parameter generation model of a multi-stage flow limiting orifice is determined.

3. The parameter design method of the multi-stage flow limiting orifice plate based on pipeline transportation according to claim 2 is characterized in that: Determine a quadratic function representing the basic parameter relationship model of the flow limiting orifice plate, including: Converting the previously acquired flow limiting orifice plate basic parameter curve relationship diagram into a flow limiting orifice plate basic parameter relationship table; the flow limiting orifice plate basic parameter curve relationship diagram is used to represent the corresponding relationship between the Reynolds number, the orifice plate flow coefficient value and the aperture ratio; each of the Reynolds number, the orifice plate flow coefficient value and the aperture ratio is in one-to-one correspondence in the flow limiting orifice plate basic parameter relationship table; The data in the limiting orifice basic parameter relationship table are fitted using the least squares method to generate a limiting orifice basic parameter relationship model; the limiting orifice basic parameter relationship model is a quadratic function with the aperture ratio as the independent variable and the orifice flow coefficient as the dependent variable.

4. The parameter design method of the multi-stage flow limiting orifice plate based on pipeline transportation according to claim 2 is characterized in that: Based on the pre-generated limiting orifice basic parameter relationship model and orifice aperture calculation model, a multi-stage limiting orifice parameter generation model is constructed, which also includes: The deformation coefficient is determined according to the pre-acquired orifice plate aperture calculation formula; the orifice plate aperture calculation formula is: Where W is the mass flow rate of the fluid; C is the orifice flow coefficient; d0 is the orifice diameter; P1 is the pressure before the orifice; P2 is the pressure after the orifice; M is the relative molecular mass of the fluid; Z is the compressibility coefficient; T is the temperature of the fluid before the orifice; k is the adiabatic index; Determining an aperture calculation function based on the orifice plate flow coefficient, the aperture ratio and the deformation coefficient; The orifice plate aperture calculation model is determined based on the aperture calculation function; the orifice plate aperture calculation model includes: an aperture calculation function, an orifice plate number calculation function, and a pressure calculation function before and after each level of orifice plates.

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

6. The parameter design method of the multi-stage flow limiting orifice plate based on pipeline transportation according to claim 5 is characterized in that: Inputting conditional data into the multi-stage flow limiting orifice parameter generation model and outputting design parameters of each stage of flow limiting orifice, including: Inputting the medium data, the pipeline data, and the target pressure data before and after the pressure reduction into the multi-stage flow limiting orifice plate parameter generation model; Calculate and output the number of orifice plates by using the orifice plate number calculation function in the orifice plate aperture calculation model; Calculate and output the pressure values ​​before and after the pressure reduction of each level of orifice plate through the pressure calculation function before and after the orifice plate of each level in the orifice plate aperture calculation model; According to the pre-acquired orifice plate aperture calculation formula, the deformation coefficients of orifice plates at each level are calculated and output; Based on the deformation coefficients of the orifice plates at each level, determining a first constraint relationship curve of an aperture calculation function in the orifice plate aperture calculation model; Based on a predetermined Reynolds number, determining a second constraint relationship curve of a quadratic function in the basic parameter relationship model of the flow limiting orifice plate; The flow coefficients of the orifice plates at each level and the corresponding apertures of the orifice plates at each level are determined according to the first constraint relationship curve and the second constraint relationship curve.

7. A parameter design device for a multi-stage flow-limiting orifice plate based on pipeline transportation, characterized in that: include: A model building module, used to build a multi-stage flow limiting orifice plate parameter generation model based on a pre-generated flow limiting orifice plate basic parameter relationship model and an orifice plate aperture calculation model; The basic parameters of the flow limiting orifice plate include: Reynolds number, orifice plate flow coefficient, and aperture ratio; A module for determining design parameters of orifice plates at each stage, used to determine design parameters of the orifice plates at each stage by using the multi-stage flow limiting orifice plate parameter generation model; The application module is used to set the flow limiting orifice plates at various levels of the throttling element in the pipeline according to the design parameters of the flow limiting orifice plates at various levels, so as to achieve medium flow limiting during pipeline transportation.

8. The parameter design device for multi-stage flow limiting orifice plates based on pipeline transportation according to claim 7 is characterized in that: The model building module further includes: A first determination module is used to determine a quadratic function representing a basic parameter relationship model of a flow limiting orifice plate; A second determination module is used to determine an aperture calculation function representing an aperture calculation model of an orifice plate; The third determination module is used to determine a set of equations for representing a multi-stage flow limiting orifice plate parameter generation model according to the one-variable quadratic function and the aperture calculation function.

9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to execute the method according to any one of claims 1 to 6.

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