Device and method for measuring the pressure difference between inlet and outlet of two-phase flow in vertical pipeline

Abstract

The present invention relates to the technical field of two-phase flow pressure difference measurement, and in particular to a device and method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline, wherein the device mainly comprises: a first pressure gauge, connected to the pipeline inlet end and the high-pressure gas cylinder, respectively, to measure the pressure value of nitrogen gas at different pressures and the initial inlet pressure value of the liquid to be measured; a second pressure gauge, arranged between the high-pressure gas cylinder and the first pressure gauge, to measure the pressure value to correct the initial inlet pressure value, and obtain the actual inlet pressure value; a third pressure gauge, connected to the pipeline and the high-pressure gas cylinder, respectively, to measure the pressure value of nitrogen gas at different pressures and the initial value of the outlet pressure of the liquid to be measured; a fourth pressure gauge, arranged between the high-pressure gas cylinder and the third pressure gauge, to measure the pressure value to correct the initial value of the outlet pressure, and obtain the actual outlet pressure value. Thus, the problem that the existing measurement method will introduce the interference of heating of the pressure pipe, causing the cavitation rate of the two-phase flow in the vertical pipeline to change, resulting in the introduction of uncertain system errors is solved.

Description

Technical Field

[0001] The invention relates to the technical field of two-phase flow pressure difference measurement, and in particular to a device and method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline. Background Art

[0002] like Figure 1 As shown, at present, the inlet and outlet pressures of vertical pipelines are generally measured by differential pressure transmitters. Differential pressure transmitters are a measuring instrument specially used to measure pressure differences. They have the advantage of high precision and are generally used to measure the pressure loss of two-phase flow in horizontal pipelines.

[0003] Compared with horizontal pipelines, the flow pressure difference of vertical pipelines is more complicated, generally consisting of three parts, namely: the pressure loss DP caused by friction resistance f , the pressure difference DP generated by the liquid gravity g and accelerated pressure drop DP a Generally, for two-phase flow, especially two-phase flow with low dryness (cavitation rate), the pressure difference DP generated by gravity g It accounts for a very important part, or even the main part, of the total pressure difference DP. Figure 1 The method requires ensuring that there is no liquid column in the upper and lower pressure pipes, otherwise the liquid column will produce additional pressure difference due to gravity, resulting in huge errors in the measurement results.

[0004] In order to avoid this problem, researchers usually heat the upper and lower pressure pipes. Under heating conditions, once the liquid column exists, it will quickly absorb heat and vaporize, thereby ensuring that the pressure pipes are filled with gas. However, this solution introduces other problems, as follows:

[0005] First, the pressure-inducing pipe itself has a certain diameter. If the pipe to be measured is of the same diameter as the pressure-inducing pipe, the presence of the pressure-inducing pipe will cause the flow field to change compared to the case without the pressure-inducing pipe. That is, the measuring device itself interferes with the internal flow characteristics of the object being measured. The closer the diameter of the pressure-inducing pipe is to the diameter of the measuring pipe, the greater the interference. This error is a systematic error and is difficult to correct and eliminate theoretically.

[0006] Second, the method of heating the lead-in pipe by wrapping a heating wire around it to ensure the evaporation of the liquid will bring additional heat flow. Once the system is in a stable operating state, the heating wire needs to continue to heat the lead-in pipe, and this part of the heat will eventually be transferred to the flowing fluid. As a result, the measurement method will affect the operating state of the object being measured.

[0007] Third, the pressure-inducing tube is not a transparent tube, so it is difficult to observe the liquid state inside the pressure-inducing tube, and the heat of the heating wire outside the pressure-inducing tube is not easy to control. Too little heating will cause the liquid to affect the pressure difference measurement accuracy, and too much heating will cause excessive additional heat input. According to the analysis of the second item, it will eventually affect the measurement of heat flux density and affect the flow and heat transfer characteristics in the vertical tube. Summary of the invention

[0008] The present invention provides a device and method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline, so as to solve the problem that the existing measurement method introduces unnecessary interference of heating of the pressure-inducing pipe, causes the cavitation rate of the two-phase flow in the vertical pipeline to change, causes system error and reduces the measurement accuracy.

[0009] A first aspect of the present invention provides a device for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline, comprising:

[0010] A first pressure gauge, one end of which is connected to the inlet end of the target vertical pipeline, and the other end of which is connected to a preset high-pressure gas cylinder, so as to respectively measure the first pressure value of nitrogen at different pressures and the initial inlet pressure value of the liquid to be measured;

[0011] a second pressure gauge, the second pressure gauge being arranged between the preset high-pressure gas cylinder and the first pressure gauge to determine an inlet horizontal installation error of the first pressure gauge by measuring a second pressure value of nitrogen with different pressures, and to correct the initial inlet pressure value by using the inlet horizontal installation error to obtain an actual inlet pressure value;

[0012] a third pressure gauge, one end of which is connected to the outlet end of the target vertical pipeline, and the other end of which is connected to the preset high-pressure gas cylinder, so as to measure the third pressure value of nitrogen gas at different pressures and the initial value of the outlet pressure of the liquid to be measured;

[0013] A fourth pressure gauge is arranged between the preset high-pressure gas cylinder and the third pressure gauge to measure a fourth pressure value of nitrogen at different pressures to determine an outlet horizontal installation error of the third pressure gauge, and the outlet horizontal installation error is used to correct the initial value of the outlet pressure to obtain an actual outlet pressure value.

[0014] Optionally, the first pressure gauge is fixed between the inlet end of the target vertical pipeline and the preset high-pressure gas cylinder through a first pressure-inducing pipe, and is perpendicular to the target vertical pipeline and the preset high-pressure gas cylinder;

[0015] The third pressure gauge is fixed between the outlet end of the target vertical pipeline and the preset high-pressure gas cylinder through a second pressure-leading pipe, and is perpendicular to the target vertical pipeline and the preset high-pressure gas cylinder.

[0016] Optionally, the first pressure-inducing tube and the second pressure-inducing tube are made of the same material and have the same size.

[0017] Optionally, the second pressure gauge is disposed on the first pressure-leading pipe, and the second pressure gauge is installed vertically.

[0018] Optionally, the fourth pressure gauge is disposed on the second pressure-inducing pipe, and the fourth pressure gauge is installed vertically.

[0019] Optionally, the distance between the second pressure gauge and the preset high-pressure gas cylinder is the same as the distance between the fourth pressure gauge and the preset high-pressure gas cylinder.

[0020] The second aspect of the present invention provides a method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline, comprising the following steps: using a preset high-pressure gas cylinder to pass nitrogen of multiple different pressures into a first pressure gauge, a second pressure gauge, a third pressure gauge and a fourth pressure gauge; obtaining a first pressure value of the first pressure gauge, a second pressure value of the second pressure gauge, a third pressure value of the third pressure gauge, and a fourth pressure value of the fourth pressure gauge under different pressures of nitrogen; determining an inlet horizontal installation error of the first pressure gauge according to the first pressure value and the second pressure value, and determining an outlet horizontal installation error of the third pressure gauge according to the third pressure value and the fourth pressure value; passing a liquid to be measured into a target vertical pipeline, and obtaining an initial inlet pressure value of the first pressure gauge and an initial outlet pressure value of the third pressure gauge; correcting the initial inlet pressure value according to the inlet horizontal installation error to generate an actual inlet pressure value, and correcting the initial outlet pressure value according to the outlet horizontal installation error to generate an actual outlet pressure value; determining the inlet and outlet pressure difference of the liquid to be measured according to the actual outlet pressure value and the actual inlet pressure value.

[0021] An embodiment of the third aspect of the present invention provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline as described in the above embodiment.

[0022] A fourth aspect of the present invention provides a computer program product, which, when executed by a processor, implements the above-mentioned method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline.

[0023] A fifth aspect of the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-mentioned method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline.

[0024] The device and method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline proposed in the embodiment of the present invention have the advantages that the pressure pipe of the horizontally installed pressure gauge is completely horizontal with the ground, there is no height difference between the position of the pressure gauge and the position of the measuring point, even if there is liquid, its gravity pressure difference is 0, there is no systematic error, and the accuracy of the measurement result is improved; with the introduction of the measuring device, the volume of the pressure pipe is shortened by more than 98%, which is almost negligible and has basically no effect on the flow field; there is no need to use an electric heating wire, no additional energy input, and does not affect the dryness and cavitation rate of the liquid to be measured; the measuring device is simple and does not affect the flow field itself, which is of great significance for improving the measurement accuracy of the inlet and outlet pressure difference of two-phase flow flowing in a vertical pipe.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0027] Figure 1 It is a structural schematic diagram of an existing vertical pipeline two-phase flow pressure difference measuring device;

[0028] Figure 2 A schematic diagram of the structure of a device for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline provided according to an embodiment of the present invention;

[0029] Figure 3 A flow chart of a method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline provided according to an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 201-preset high-pressure gas cylinder, 202-first pressure gauge, 203-second pressure gauge, 204-third pressure gauge, 205-fourth pressure gauge, 206-first valve, 207-second valve, 208-third valve, 209-fourth valve, 40-electronic equipment, 401-memory and 402-processor. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] The following describes the device and method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline according to an embodiment of the present invention with reference to the accompanying drawings. With respect to the existing device for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline mentioned in the background technology center, the volume of the pressure pipe cannot be ignored, which will interfere with the flow field. The electric heating wire generates gas when heated, which affects the state of the measured object such as the dryness and cavitation rate. There is a liquid column in the pressure pipe, which brings about system errors and affects the measurement accuracy. The present invention provides a new device for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline. In the device, the volume of the pressure pipe is shortened, the liquid column can be ignored, and no electric heating wire is required. Thus, the problem that the existing measurement method introduces unnecessary heating interference of the pressure pipe, which causes the cavitation rate of the two-phase flow in the vertical pipeline to change, causing system errors and reducing the measurement accuracy is solved.

[0035] Specifically, Figure 2 A schematic diagram of the structure of a device for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline provided by an embodiment of the present invention.

[0036] like Figure 2 As shown, the device for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline includes: a preset high-pressure gas cylinder 201, a first pressure gauge 202, a second pressure gauge 203, a third pressure gauge 204 and a fourth pressure gauge 205.

[0037] It should be noted that since different pressure gauges may have zero point differences and measurement inconsistencies (for example, for a standard pressure of 1 MPa, different pressure gauges may have errors and the pressure gauge readings need to be corrected), a high-precision piston pressure calibration instrument must be used before installation to calibrate the first pressure gauge 202, the second pressure gauge 203, the third pressure gauge 204 and the fourth pressure gauge 205 respectively, to obtain correction curves of the four pressure gauges relative to the standard pressure, thereby ensuring the measurement accuracy of the pressure gauges themselves.

[0038] Among them, the preset high-pressure gas cylinder 201 is connected to the first pressure gauge 202 and the third pressure gauge 204 through a static pressure box to provide nitrogen of multiple different pressures. One end of the first pressure gauge 202 is connected to the inlet end of the target vertical pipeline, and the other end of the first pressure gauge 202 is connected to the static pressure box to respectively measure the first pressure value of nitrogen of different pressures and the initial inlet pressure value of the liquid to be tested. The second pressure gauge 203 is arranged between the static pressure box and the first pressure gauge 202 to measure the second pressure value of nitrogen of different pressures to determine the inlet horizontal installation error of the first pressure gauge 202, and the initial inlet pressure value is corrected by the inlet horizontal installation error to obtain the actual inlet pressure value. One end of the third pressure gauge 204 is connected to the outlet end of the target vertical pipeline, and the other end of the third pressure gauge 204 is connected to the static pressure box to measure the third pressure value of nitrogen of different pressures and the initial value of the outlet pressure of the liquid to be tested. The fourth pressure gauge 205 is arranged between the static pressure box and the third pressure gauge 204 to measure the fourth pressure value of nitrogen at different pressures to determine the outlet horizontal installation error of the third pressure gauge 204, and use the outlet horizontal installation error to correct the initial value of the outlet pressure to obtain the actual outlet pressure value.

[0039] In the actual implementation process, the preset high-pressure gas cylinder 201 is connected to the static pressure box, and a pressure reducing valve is provided between the preset high-pressure gas cylinder 201 and the static pressure box. The pressure of the static pressure box is controlled by the pressure reducing valve, so that the preset high-pressure gas cylinder 201 can provide nitrogen at multiple different pressures.

[0040] It should be noted that the first pressure gauge 202, the second pressure gauge 203, the third pressure gauge 204 and the fourth pressure gauge 205 can be made of electronic diffused silicon pressure sensors, mechanical pointer pressure gauges, etc. Among them, the error caused by the installation direction of the electronic diffused silicon pressure sensor is small and can be ignored. Therefore, in actual operation, it is recommended to use electronic diffused silicon pressure sensors, and mechanical pointer pressure gauges are not recommended, because horizontal installation will cause large installation errors to the measurement results of the mechanical pointer pressure gauge due to the gravity of the pointer. However, those skilled in the art can make targeted choices based on actual conditions, and no specific limitations are made here.

[0041] In some embodiments, the first pressure gauge 202 is fixed between the inlet end of the target vertical pipeline and the preset high-pressure gas cylinder 201 through a first pressure-conducting pipe, and is perpendicular to the target vertical pipeline and the preset high-pressure gas cylinder 201; the third pressure gauge 204 is fixed between the outlet end of the target vertical pipeline and the preset high-pressure gas cylinder 201 through a second pressure-conducting pipe, and is perpendicular to the target vertical pipeline and the preset high-pressure gas cylinder 201.

[0042] In the actual implementation process, the inlet end of the target vertical pipeline is connected with the preset high-pressure gas cylinder 201 and the static pressure box through the first pressure-leading pipe, the first pressure gauge 202 is arranged on the first pressure-leading pipe, and the first valve 206 and the second valve 207 are respectively provided on both sides of the first pressure gauge 202, so as to ensure that the process of correcting the first pressure gauge 202 is independent of measuring the initial inlet pressure value of the liquid to be tested, and the first pressure value and the initial inlet pressure value of nitrogen under different pressures are measured respectively; the outlet end of the target vertical pipeline is also connected with the preset high-pressure gas cylinder 201 and the static pressure box through the second pressure-leading pipe, the third pressure gauge 204 is arranged on the second pressure-leading pipe, and the third valve 208 and the fourth valve 209 are respectively provided on both sides of the third pressure gauge 204, so as to ensure that the process of correcting the third pressure gauge 204 is independent of measuring the initial outlet pressure value of the liquid to be tested, and the third pressure value and the initial outlet pressure value of nitrogen under different pressures are measured respectively.

[0043] It should be noted that the materials and dimensions of the first pressure-inducing tube and the second pressure-inducing tube must be the same to ensure that the measured pressure value is not affected.

[0044] In some embodiments, the second pressure gauge 203 is arranged on the first pressure pipe, and the second pressure gauge 203 is installed vertically, that is, parallel to the flow pipe, and the fourth pressure gauge 205 is arranged on the second pressure pipe, and the fourth pressure gauge 205 is installed vertically, that is, parallel to the flow pipe.

[0045] In the actual implementation process, the standard use and calibration method of the pressure gauge is vertical installation, so the horizontal installation of the first pressure gauge 202 and the third pressure gauge 204 will inevitably cause certain errors. Therefore, in the embodiment of the present invention, the second pressure gauge 203 is vertically arranged on the first pressure-conducting pipe, and the second pressure gauge 203 is located between the second valve 207 and the preset high-pressure gas cylinder 201, so as to measure the true inlet pressure value of nitrogen at different pressures, that is, the second pressure value, and use the second pressure value to judge the inlet horizontal installation error value carried by the first pressure value measured by the first pressure gauge 202; in the embodiment of the present invention, the fourth pressure gauge 205 is vertically arranged on the second pressure-conducting pipe, and the fourth pressure gauge 205 is located between the fourth valve 209 and the preset high-pressure gas cylinder 201, so as to measure the true outlet pressure value of nitrogen at different pressures, that is, the fourth pressure value, and use the fourth pressure value to judge the outlet horizontal installation error value carried by the third pressure value measured by the third pressure gauge 204.

[0046] Further, after determining the error values ​​of the first pressure gauge 202 and the third pressure gauge 204, the first valve 206 and the third valve 208 that were closed during the correction of the first pressure gauge 202 and the third pressure gauge 204 are opened, and the opened second valve 207 and the fourth valve 209 are closed, and the two-phase flow inlet and outlet pressure difference measurement process is started, the liquid to be measured is introduced into the target vertical pipeline, the first pressure gauge 202 measures the initial inlet pressure value, the third pressure gauge 204 measures the initial outlet pressure value, the initial inlet pressure value is corrected by the inlet horizontal installation error to obtain the actual inlet pressure value, the initial outlet pressure value is corrected according to the outlet horizontal installation error to obtain the actual outlet pressure value, and finally the inlet and outlet pressure difference of the liquid to be measured can be obtained according to the actual outlet pressure value and the actual inlet pressure value.

[0047] In some embodiments, the distance between the second pressure gauge 203 and the preset high pressure gas cylinder 201 is the same as the distance between the fourth pressure gauge 205 and the preset high pressure gas cylinder 201 .

[0048] It can be understood that the distance between the second pressure gauge 203 and the preset high-pressure gas cylinder 201 is the same as the distance between the fourth pressure gauge 205 and the preset high-pressure gas cylinder 201, which can ensure that the measured gas capacity is the same and the measurement time is equal, thereby achieving a higher accuracy of the measured pressure value.

[0049] The working principle of the device for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline proposed in an embodiment of the present invention is described in detail below.

[0050] Close the first valve 206 and the third valve 208, open the second valve 207 and the fourth valve 209, and introduce nitrogen of multiple different pressures from the preset high-pressure gas cylinder 201 to the first pressure gauge 202, the second pressure gauge 203, the third pressure gauge 204 and the fourth pressure gauge 205, and the four pressure gauges respectively obtain the first pressure value, the second pressure value, the third pressure value and the fourth pressure value under the nitrogen of different pressures, and determine the inlet horizontal installation error of the first pressure gauge 202 according to the first pressure value and the second pressure value, and determine the outlet horizontal installation error of the third pressure gauge 204 according to the third pressure value and the fourth pressure value;

[0051] Open the first valve 206 and the third valve 208, close the second valve 207 and the fourth valve 209, and introduce the liquid to be tested into the target vertical pipeline. The first pressure gauge 202 measures the initial inlet pressure value, and the third pressure gauge 204 measures the initial outlet pressure value. The initial inlet pressure value is corrected using the inlet horizontal installation error to generate an actual inlet pressure value. The initial outlet pressure value is corrected using the outlet horizontal installation error to generate an actual outlet pressure value. The actual outlet pressure value is subtracted from the actual inlet pressure value to obtain the inlet and outlet pressure difference of the liquid to be tested.

[0052] The device for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline according to an embodiment of the present invention has the following beneficial effects:

[0053] (1) Since the pressure pipe of the horizontally installed pressure gauge is completely horizontal with the ground, there is no height difference between the pressure gauge and the measuring point. Even if there is liquid, the gravity pressure difference is 0, and there is no systematic error, which improves the accuracy of the measurement results.

[0054] (2) With the introduction of this measuring device, the volume of the pressure lead pipe is shortened by more than 98%, which is almost negligible and has little effect on the flow field;

[0055] (3) No need to use electric heating wire, no additional energy input, and no impact on the dryness and cavitation rate of the liquid to be tested;

[0056] (4) The measuring device is simple and does not affect the flow field itself, which is of great significance for improving the measurement accuracy of the inlet and outlet pressure difference of two-phase flow in a vertical pipe.

[0057] Next, a method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0058] Figure 3 It is a flow chart of a method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline according to an embodiment of the present invention.

[0059] like Figure 3 As shown, the method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline includes the following steps:.

[0060] In step S301, nitrogen of multiple different pressures is introduced into the first pressure gauge, the second pressure gauge, the third pressure gauge and the fourth pressure gauge using a preset high-pressure gas cylinder.

[0061] In step S302, a first pressure value of the first pressure gauge, a second pressure value of the second pressure gauge, a third pressure value of the third pressure gauge, and a fourth pressure value of the fourth pressure gauge under different pressures of nitrogen are obtained.

[0062] In step S303, an inlet horizontal installation error of the first pressure gauge is determined according to the first pressure value and the second pressure value, and an outlet horizontal installation error of the third pressure gauge is determined according to the third pressure value and the fourth pressure value.

[0063] In step S304, the liquid to be tested is introduced into the target vertical pipeline, and an initial inlet pressure value of the first pressure gauge and an initial outlet pressure value of the third pressure gauge are obtained.

[0064] In step S305, the initial inlet pressure value is corrected according to the inlet horizontal installation error to generate an actual inlet pressure value, and the initial outlet pressure value is corrected according to the outlet horizontal installation error to generate an actual outlet pressure value.

[0065] In step S306, the inlet and outlet pressure difference of the liquid to be tested is determined according to the actual outlet pressure value and the actual inlet pressure value.

[0066] It should be noted that the above explanation of the embodiment of the measuring device for the inlet and outlet pressure difference of two-phase flow in a vertical pipeline is also applicable to the measuring method for the inlet and outlet pressure difference of two-phase flow in a vertical pipeline of this embodiment, which will not be repeated here.

[0067] The method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline proposed in an embodiment of the present invention has the following beneficial effects:

[0068] (1) Since the pressure pipe of the horizontally installed pressure gauge is completely horizontal with the ground, there is no height difference between the pressure gauge and the measuring point. Even if there is liquid, the gravity pressure difference is 0, and there is no systematic error, which improves the accuracy of the measurement results.

[0069] (2) With the introduction of this measuring device, the volume of the pressure lead pipe is shortened by more than 98%, which is almost negligible and has little effect on the flow field;

[0070] (3) No need to use electric heating wire, no additional energy input, and no impact on the dryness and cavitation rate of the liquid to be tested;

[0071] (4) The measuring device is simple and does not affect the flow field itself, which is of great significance for improving the measurement accuracy of the inlet and outlet pressure difference of two-phase flow in a vertical pipe.

[0072] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. The electronic device 40 may include:

[0073] Memory 401 , processor 402 , and a computer program stored in the memory 401 and executable on the processor 402 .

[0074] When the processor 402 executes the program, the method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline provided in the above embodiment is implemented.

[0075] Furthermore, the electronic device further comprises:

[0076] The communication interface 403 is used for communication between the memory 401 and the processor 402 .

[0077] The memory 401 is used to store computer programs that can be executed on the processor 402 .

[0078] The memory 401 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0079] If the memory 401, the processor 402 and the communication interface 403 are implemented independently, the communication interface 403, the memory 401 and the processor 402 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0080] Optionally, in a specific implementation, if the memory 401, the processor 402 and the communication interface 403 are integrated on a chip, the memory 401, the processor 402 and the communication interface 403 can communicate with each other through an internal interface.

[0081] The processor 402 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.

[0082] An embodiment of the present invention further provides a computer program product, which implements the above-mentioned method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline when the computer program / instructions are executed by a processor.

[0083] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0085] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "N" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0086] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0087] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary and then storing it in a computer memory.

[0088] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0089] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0090] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0091] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A device for measuring the pressure difference between the inlet and outlet of a two-phase flow in a vertical pipeline, characterized in that: include: A first pressure gauge, one end of which is connected to the inlet end of the target vertical pipeline, and the other end of which is connected to a preset high-pressure gas cylinder, so as to respectively measure the first pressure value of nitrogen gas at different pressures and the initial inlet pressure value of the liquid to be measured; a second pressure gauge, the second pressure gauge being arranged between the preset high-pressure gas cylinder and the first pressure gauge to determine an inlet horizontal installation error of the first pressure gauge by measuring a second pressure value of nitrogen with different pressures, and to correct the initial inlet pressure value by using the inlet horizontal installation error to obtain an actual inlet pressure value; a third pressure gauge, one end of which is connected to the outlet end of the target vertical pipeline, and the other end of which is connected to the preset high-pressure gas cylinder, so as to measure the third pressure value of nitrogen gas at different pressures and the initial value of the outlet pressure of the liquid to be measured; a fourth pressure gauge, the fourth pressure gauge being arranged between the preset high-pressure gas cylinder and the third pressure gauge, to measure a fourth pressure value of nitrogen gas at different pressures to determine an outlet horizontal installation error of the third pressure gauge, and to use the outlet horizontal installation error to correct the outlet pressure initial value to obtain an actual outlet pressure value, The first pressure gauge is fixed between the inlet end of the target vertical pipeline and the preset high-pressure gas cylinder through a first pressure-inducing pipe, and is perpendicular to the target vertical pipeline and the preset high-pressure gas cylinder; The third pressure gauge is fixed between the outlet end of the target vertical pipeline and the preset high-pressure gas cylinder through a second pressure-inducing pipe, and is perpendicular to the target vertical pipeline and the preset high-pressure gas cylinder; The second pressure gauge is arranged on the first pressure-inducing pipe, and the second pressure gauge is installed vertically; The fourth pressure gauge is disposed on the second pressure-inducing pipe, and the fourth pressure gauge is installed vertically.

2. The device for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline according to claim 1, characterized in that: The first pressure-inducing tube and the second pressure-inducing tube are made of the same material and have the same size.

3. The device for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline according to claim 1, characterized in that: The distance between the second pressure gauge and the preset high-pressure gas cylinder is the same as the distance between the fourth pressure gauge and the preset high-pressure gas cylinder.

4. A method for measuring the pressure difference between the inlet and outlet of a two-phase flow in a vertical pipeline, characterized in that: The device for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline according to any one of claims 1 to 3 comprises the following steps: Using a preset high-pressure gas cylinder to introduce nitrogen of multiple different pressures into the first pressure gauge, the second pressure gauge, the third pressure gauge and the fourth pressure gauge; Obtaining a first pressure value of the first pressure gauge, a second pressure value of the second pressure gauge, a third pressure value of the third pressure gauge, and a fourth pressure value of the fourth pressure gauge under different pressures of nitrogen; Determine an inlet horizontal installation error of the first pressure gauge according to the first pressure value and the second pressure value, and determine an outlet horizontal installation error of the third pressure gauge according to the third pressure value and the fourth pressure value; Introducing the liquid to be tested into the target vertical pipeline, and obtaining the initial inlet pressure value of the first pressure gauge and the initial outlet pressure value of the third pressure gauge; Correcting the initial inlet pressure value according to the inlet horizontal installation error to generate an actual inlet pressure value, and correcting the initial outlet pressure value according to the outlet horizontal installation error to generate an actual outlet pressure value; The inlet and outlet pressure difference of the liquid to be tested is determined according to the actual outlet pressure value and the actual inlet pressure value.

5. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline as claimed in claim 4.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the method for measuring the inlet and outlet pressure difference of two-phase flow in a vertical pipeline as claimed in claim 4.

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