Method and system for inner interface height recognition for mechanical interface regulator
Patent Information
- Application Number
- CN202510560429.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-10-30
AI Technical Summary
或者，需要在容器上额外安装射频导纳界面仪或磁质伸缩界面仪进行界面查看，部分容器由于工艺的特殊性，需要安装多套界面仪，大幅增加了三相分离器的建造成本
[0028]本发明提出了一种用于机械式界面调节器的内界面高度识别方法及系统。该方法及系统通过在三相分离器中的机械式界面调节器的调节螺杆外部配置带有刻度的标尺，并根据表示三相分离器对应的溢油板上沿与机械调节器所带动的调节筒上沿间的高度差的标准差距离、以及油水密度，建立表示刻度零点与实际初始内界面高度间对应关系的第一关系式，再根据油水密度来建立表示调节筒移动距离与内界面浮动距离间对应关系的第二关系式，进而在通过机械调节器来对该三相分离器的油水界面进行调节控制时，根据螺杆顶面对应的实际刻度，利用第一关系式和第二关系式，确定当前内界面的实际高度。本发明实现了针对三相分离器内当前内界面的实际高度的间接表示，减少建造成本的增加，进一步提高三相分离器调试的精确性。另外，标尺作为机械式界面调节器的附件，在不使用其他自动化装置和仪表的情况下，使得该机械式界面调节器具有内界面间接可视化的功能，且该标尺具有结构精简巧妙，运行稳定等特点，可以以简单直接的方式配置在大多机械式界面调节器的调节螺杆外，硬件成本低、运行期间无需维护。
Smart Images
Figure CN123007940A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of separator instrument technology, and in particular to a method and system for identifying the internal interface height of a mechanical interface regulator. Background Technology
[0002] The internal interface refers to the interface between two liquids in a three-phase separator (one of which is a gas phase). Taking an oil-gas-water three-phase separator as an example, its internal interface is the interface between the oil phase and the water phase within the separator. The oil-water interface control device is one of the core components of the separator, and the stability and controllability of the oil-water interface are key factors in ensuring its water separation effect.
[0003] Currently, the mainstream control methods for the oil-water interface include: 1. Interlocking control via an automatic interface controller and electric valve (automatic control); 2. Control via a mechanical interface regulator and float linkage (mechanical control).
[0004] Three-phase separators using mechanical control methods often present challenges during commissioning and setup. Because the interface is not directly visible, adjustments are difficult and often lack precision, requiring repeated level checks via sampling ports on the side of the container. This necessitates operators with extensive experience in adjustment, requiring iterative adjustments based on their expertise. Alternatively, additional radio frequency admittance interface meters or magnetic extensibility interface meters may need to be installed on the container for interface monitoring. Due to the specific nature of some processes, multiple interface meters may be required, significantly increasing the construction cost of the three-phase separator.
[0005] Therefore, there is an urgent need for a method to accurately identify the internal interface height of mechanical interface regulators. Summary of the Invention
[0006] The purpose of this invention is to provide a solution that determines the actual height of the inner interface corresponding to the oil-water interface in a three-phase separator by determining the moving distance of a mechanical interface regulator, thereby achieving an indirect visualization effect of the inner interface.
[0007] To address the aforementioned technical problems, this invention provides a method for identifying the inner interface height of a mechanical interface regulator, comprising: configuring a graduated scale on the outside of the adjusting screw of the mechanical interface regulator in a three-phase separator; establishing a first relational expression representing the correspondence between the zero point of the scale and the actual initial inner interface height based on the standard deviation distance representing the height difference between the upper edge of the overflow plate corresponding to the three-phase separator and the upper edge of the adjusting cylinder driven by the mechanical regulator, and the oil-water density; establishing a second relational expression representing the correspondence between the moving distance of the adjusting cylinder and the floating distance of the inner interface based on the oil-water density; and determining the actual height of the current inner interface based on the actual scale corresponding to the top surface of the screw, using the first and second relational expressions, when adjusting and controlling the oil-water interface of the three-phase separator through the mechanical regulator.
[0008] Preferably, the first relation is represented by the following expression:
[0009]
[0010] Where, ρ o ρ represents the density of oil. w H1 represents the water density, H1 represents the initial oil layer thickness used to characterize the actual initial internal interface height, and ΔH represents the standard deviation distance.
[0011] Preferably, the second relation is represented by the following expression:
[0012]
[0013] Where N represents the ratio of the moving distance of the regulating cylinder to the floating distance of the inner interface, ΔH2 represents the moving distance of the regulating cylinder, and ΔH1 represents the floating distance of the inner interface.
[0014] Preferably, the step of determining the actual height of the current inner interface based on the actual scale corresponding to the top surface of the screw, using the first and second relational formulas, includes: determining the actual initial inner interface height based on the zero point of the scale using the first relational formula; calculating the changed height of the inner interface based on the number of scale steps between the actual scale and the zero point using the second relational formula; and obtaining the actual height of the current inner interface based on the initial inner interface height and the changed height of the inner interface.
[0015] Preferably, the first relation is constructed through the following steps: when the mechanical regulator is in the initial position, the following first expression and second expression exist respectively:
[0016] ρ o gH1+ρ w gH2=ρ w gH
[0017] H1 + H2 - H = ΔH
[0018] In this expression, the first expression indicates that the water column pressure inside the regulating cylinder of the mechanical regulator is the sum of the oil layer pressure and the water layer pressure. The second expression indicates that the standard deviation distance is equal to the difference between the sum of the initial oil layer thickness and the initial water layer thickness and the initial height of the water column inside the regulating cylinder of the mechanical regulator. g represents the acceleration due to gravity, H2 represents the initial water layer thickness, and H represents the initial height of the water column inside the regulating cylinder. The first relationship is obtained by substituting the second expression into the first expression and rearranging it.
[0019] Preferably, the second relation is constructed through the following steps: After the mechanical regulator performs interface adjustment control, the following third expression exists:
[0020] ρog(H1+ΔH1)+ρ w g(H2-ΔH1)=ρ w g(H-ΔH2)
[0021] The third expression indicates that the pressure change of the water column inside the regulating cylinder of the mechanical regulator is the sum of the pressure increase of the oil layer and the pressure decrease of the water layer. Subtracting the first expression from the third expression yields the fourth expression, which, after simplification, leads to the second relational expression:
[0022] (ρ o -ρ w )gΔH1=-ρ w gΔH2.
[0023] Preferably, the scale is mounted on a sleeve outside the adjusting screw of the mechanical interface regulator in the three-phase separator.
[0024] On the other hand, embodiments of the present invention also provide an internal interface height identification system for a mechanical interface regulator. This internal interface height identification system is used to implement the above-mentioned internal interface height identification method. The internal interface height identification system includes: a scale installed outside the adjusting screw of the mechanical interface regulator in the three-phase separator; and an internal interface height identification module configured to determine the actual height of the current internal interface based on the actual scale corresponding to the top surface of the screw, using a preset first and second relational expression, when the oil-water interface of the three-phase separator is adjusted and controlled by the mechanical regulator. The first relational expression representing the correspondence between the scale zero point and the actual initial internal interface height is established based on the standard deviation distance representing the height difference between the upper edge of the overflow plate corresponding to the three-phase separator and the upper edge of the adjusting cylinder driven by the mechanical regulator, and the oil-water density. The second relational expression representing the correspondence between the moving distance of the adjusting cylinder and the floating distance of the internal interface is established based on the oil-water density.
[0025] Preferably, the inner interface height recognition module is further configured to determine the actual initial inner interface height based on the zero point of the scale using a first relational expression, then calculate the inner interface change height based on the number of scale steps between the actual scale and the zero point using a second relational expression, and finally obtain the current actual height of the inner interface based on the initial inner interface height and the inner interface change height.
[0026] Preferably, the scale is mounted on a sleeve outside the adjusting screw of the mechanical interface regulator in the three-phase separator.
[0027] Compared with the prior art, one or more embodiments of the above solutions may have the following advantages or beneficial effects:
[0028] This invention proposes a method and system for identifying the internal interface height of a mechanical interface regulator. The method and system utilize a graduated scale externally mounted on the adjusting screw of the mechanical interface regulator in a three-phase separator. Based on the standard deviation of the height difference between the upper edge of the overflow plate corresponding to the three-phase separator and the upper edge of the adjusting cylinder driven by the mechanical regulator, as well as the oil-water density, a first relationship is established representing the correspondence between the zero point of the scale and the actual initial internal interface height. Then, based on the oil-water density, a second relationship is established representing the correspondence between the moving distance of the adjusting cylinder and the floating distance of the internal interface. When adjusting the oil-water interface of the three-phase separator using the mechanical regulator, the actual height of the current internal interface is determined based on the actual scale corresponding to the top surface of the screw, using the first and second relationships. This invention achieves an indirect representation of the actual height of the current internal interface within a three-phase separator, reducing construction costs and further improving the accuracy of three-phase separator commissioning. In addition, as an accessory to the mechanical interface controller, the scale enables the mechanical interface controller to have the function of indirect visualization of the internal interface without the use of other automation devices and instruments. The scale is characterized by its simple and ingenious structure and stable operation. It can be configured in a simple and direct way outside the adjustment screw of most mechanical interface controllers, with low hardware cost and no maintenance required during operation.
[0029] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description
[0030] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:
[0031] Figure 1This is a schematic diagram of the structure of the three-phase separator used in the internal interface height identification method for a mechanical interface regulator according to an embodiment of this application.
[0032] Figure 2 This is a schematic diagram showing the positional relationship between the scale sleeve in the three-phase separator and the mechanical interface regulator used in the internal interface height identification method for a mechanical interface regulator according to an embodiment of this application.
[0033] Figure 3 This is a schematic diagram illustrating the steps of an internal interface height recognition method for a mechanical interface adjuster according to an embodiment of this application.
[0034] Figure 4 This is a schematic diagram of the scale sleeve in the three-phase separator used in the internal interface height identification method for a mechanical interface regulator according to an embodiment of this application.
[0035] Figure 5 This is a schematic diagram of the internal interface height recognition system for a mechanical interface adjuster according to an embodiment of this application. Detailed Implementation
[0036] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples, so that the process of how the present invention uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. It should be noted that, as long as there is no conflict, the various embodiments and features in the various embodiments of the present invention can be combined with each other, and the resulting technical solutions are all within the protection scope of the present invention.
[0037] Furthermore, the steps illustrated in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than that shown here.
[0038] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms “a” and “an” as used herein are also intended to include the plural. It should also be understood that the terms “comprising” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, without excluding the presence or addition of one or more other features, integers, steps, operations, units, components, and / or combinations thereof.
[0039] To address one or more of the technical problems described in the background section, embodiments of the present invention provide a method and system for identifying the internal interface height of a mechanical interface regulator. This method and system utilize a graduated scale externally mounted on the adjusting screw of the mechanical interface regulator in a three-phase separator. The actual height of the current internal interface in the three-phase separator is indirectly characterized based on the actual graduations on the scale, thus solving problems such as the inability to visually inspect the internal interface and the increased construction cost of the three-phase separator.
[0040] Therefore, in order to reduce the increase in construction costs and further improve the accuracy of three-phase separator commissioning, this invention determines the actual height of the inner interface corresponding to the oil-water interface in the three-phase separator by determining the moving distance of the mechanical interface regulator, thereby achieving the effect of indirect visualization of the inner interface.
[0041] Figure 1 This is a schematic diagram of the structure of the three-phase separator used in the internal interface height identification method for a mechanical interface regulator according to an embodiment of this application. Figure 2 This is a schematic diagram showing the positional relationship between the scale sleeve in the three-phase separator and the mechanical interface regulator used in the internal interface height identification method for a mechanical interface regulator according to an embodiment of this application. The following is in conjunction with... Figure 1 and Figure 2 The specific details of the three-phase separator and scale sleeve used in the implementation of the internal interface height identification method in the embodiments of the present invention will be described.
[0042] like Figure 1 As shown, a graduated scale is installed on the outside of the adjusting screw in the mechanical regulator of the three-phase separator, with the scale markings indicating the interface height value. The top surface of the adjusting screw of the mechanical interface regulator serves as a pointer, and the scale corresponding to the top surface of the screw displays the current interface of the regulating cylinder driven by the mechanical regulator.
[0043] During operation, the three-phase separator receives a mixture of oil, water, and gas from the left side, and then sequentially separates the oil and water to the right side. The separated oil and water flow out from the bottom of the separator through the corresponding oil chamber float connecting rod control valve, while the separated gas is discharged from the top outlet.
[0044] Figure 4 This is a schematic diagram of the scale sleeve in the three-phase separator used in the internal interface height identification method for a mechanical interface regulator according to an embodiment of this application.
[0045] In one embodiment, the scale is disposed on a sleeve outside the adjusting screw of the mechanical interface conditioner in the three-phase separator, so that a sleeve with a scale, i.e., a scale sleeve, is formed outside the adjusting screw. Furthermore, the height of the scale sleeve is not less than the thread length of the adjusting screw of the mechanical interface conditioner.
[0046] Figure 3 This is a schematic diagram illustrating the steps of the internal interface height recognition method for a mechanical interface adjuster according to an embodiment of this application, which specifically includes the following steps:
[0047] In step S310, a graduated scale is configured on the outside of the adjusting screw of the mechanical interface regulator in the three-phase separator.
[0048] In this embodiment of the invention, the graduated ruler can be of any form, such as a straight ruler, a sleeve, a sticker, or other structure that can be engraved with graduations, and the invention does not impose any specific limitations on it.
[0049] After the graduated scale is placed outside the adjusting screw of the mechanical interface adjuster, the current actual scale can be determined based on the top surface of the adjusting screw, thereby associating the scale scale with the actual interface height, and then analyzing the relationship between the scale zero point and the scale step and the movement of the inner interface in the subsequent step S320.
[0050] Step S320 establishes a first relational expression representing the correspondence between the zero point of the scale and the actual initial inner interface height based on the standard deviation distance and the oil-water density. In this embodiment of the invention, the standard deviation distance is used to represent the height difference between the upper edge of the overflow plate corresponding to the three-phase separator and the upper edge of the regulating cylinder driven by the mechanical regulator.
[0051] Specifically, the height difference between the upper edge of the overflow plate corresponding to the three-phase separator and the upper edge of the regulating cylinder driven by the mechanical regulator is obtained as the standard deviation distance. The oil density and water density are also obtained. Then, based on the standard deviation distance, oil and water density and Bernoulli's equation, a first relational expression is established to represent the correspondence between the zero point of the scale and the actual initial inner interface height.
[0052] In one embodiment, the first relation is represented by the following expression:
[0053]
[0054] Where, ρ o ρ represents the density of oil. w H1 represents the water density, H1 represents the initial oil layer thickness used to characterize the actual initial internal interface height, and ΔH represents the standard deviation distance.
[0055] In one embodiment, determining the first relation may include the following:
[0056] When the mechanical regulator is in its initial position, the following first and second expressions exist respectively:
[0057] ρ o gH1+ρ W gH2=ρ W gH -----First Expression
[0058] H1 + H2 - H = ΔH ----- Second expression
[0059] In this expression, the first expression indicates that the water column pressure inside the regulating cylinder of the mechanical regulator is the sum of the oil layer pressure and the water layer pressure. The second expression indicates that the standard deviation distance is equal to the difference between the sum of the initial oil layer thickness and the initial water layer thickness and the initial height of the water column inside the regulating cylinder of the mechanical regulator. g represents the acceleration due to gravity, H2 represents the initial water layer thickness, and H represents the initial height of the water column inside the regulating cylinder.
[0060] Then, by substituting the second expression into the first expression and rearranging it, we can obtain the first expression.
[0061] Step S330 establishes a second relational expression based on the oil-water density to represent the correspondence between the moving distance of the regulating cylinder and the floating distance of the inner interface.
[0062] Specifically, after the mechanical regulator performs interface adjustment control, there exists a third expression representing that the pressure change of the water column inside the regulating cylinder of the mechanical regulator is the sum of the pressure increase of the oil layer and the pressure decrease of the water layer. Then, based on the third expression and the aforementioned first expression, a fourth expression is obtained. After rearranging the fourth expression, a second relational expression is obtained. Based on the second expression, it is determined that the ratio of the moving distance of the regulating cylinder to the floating distance of the oil-water interface is only related to the density information of the oil and water. Subsequently, the actual height of the current inner interface can be determined based on the second relational expression.
[0063] In one embodiment, after the mechanical regulator performs interface adjustment control, the following third expression exists:
[0064] ρ o g(H1+ΔH1)+ρ w g(H2-ΔH1)=ρ w g(H-ΔH2) ----- Third expression
[0065] The third expression represents the change in water column pressure within the regulating cylinder of the mechanical regulator as the sum of the pressure increase due to the increase in oil layer thickness and the pressure decrease due to the decrease in water layer thickness. Subtracting the first expression from the third expression yields the following fourth expression:
[0066] (ρ0-ρ w )gΔH1=-ρ w gΔH2-----Fourth expression
[0067] After rearranging the fourth expression, we obtain the second relational expression representing the correspondence between the moving distance of the regulating cylinder (i.e., ΔH2) and the floating distance of the inner interface (i.e., ΔH1).
[0068] In one embodiment, the second relation can be represented by the following expression:
[0069]
[0070] Where N represents the ratio of the moving distance of the regulating cylinder to the floating distance of the inner interface, ΔH2 represents the moving distance of the regulating cylinder, and ΔH1 represents the floating distance of the inner interface.
[0071] After obtaining the first relational expression in step S320 and the second relational expression in step S330, the actual height of the current inner interface can be determined in subsequent step S340 after obtaining the corresponding actual scale through the ruler, based on the first relational expression and the second relational expression.
[0072] In step S340, when adjusting and controlling the oil-water interface of the three-phase separator through the mechanical regulator, the actual height of the current inner interface is determined based on the actual scale corresponding to the top surface of the screw, using the first and second relational formulas.
[0073] Specifically, when adjusting and controlling the oil-water interface of the three-phase separator through the mechanical regulator, the actual scale corresponding to the current position is determined according to the scale and the top surface of the screw, and the initial scale is determined according to the first relational formula, thereby determining the corresponding moving distance of the regulating cylinder. Finally, the actual height of the current inner interface is identified according to the correspondence between the moving distance of the regulating cylinder and the floating distance of the inner interface determined by the second relational formula.
[0074] In one embodiment, in the step of determining the actual height of the current inner interface based on the actual scale corresponding to the top surface of the screw and using the first and second relational formulas, the actual height of the current inner interface can be determined according to the following steps to achieve indirect visualization of the current inner interface. The specific implementation method is as follows:
[0075] The step of determining the actual height of the current inner interface based on the actual scale corresponding to the top surface of the screw, using the first and second relational formulas, includes:
[0076] Based on the zero point of the scale, the actual initial inner interface height is determined using the first relationship.
[0077] Based on the number of scale steps between the actual scale and the zero point, the change height of the inner interface is calculated using the second relationship.
[0078] Based on the initial height of the inner interface and the changed height of the inner interface, the actual height of the current inner interface is obtained.
[0079] For example, continuing with the oil-water-gas three-phase separator, the inner diameter of the three-phase separator is 4000mm, and the oil density at the oil outlet is 0.9g / cm³. 3 The water density at the water outlet is 1 g / cm³. 3 The vertical distance from the top edge of the overflow plate of the three-phase separator to the bottom of the container is 3500mm. When the float of the mechanical interface adjuster is adjusted to the lowest position, the vertical distance from the top edge of the float to the bottom of the container is 3300mm. Substituting the data into the first relational formula, we get: H1=1*(3500-3300) / (1-0.9)=2000, that is, the initial oil layer thickness is 2000mm. Based on this initial oil layer thickness, the vertical distance from the oil-water interface to the bottom of the three-phase separator is 3500-2000=1500mm, that is, the initial point of the scale is 1500mm. Substituting the data into the second relational formula, we get: N=(1-0.9) / 1=0.1, that is, the ratio of the scale step size to the interface movement distance is 0.1. In other words, when the scale changes by 1mm, the oil-water interface changes by 10mm. The physical step size of the scale is 1 mm, and the numerical step size of the scale is 10 mm.
[0080] Furthermore, when adjusting the mechanical interface regulator, the current scale reading of 1600mm is obtained, which is 100mm different from the initial point of 1500mm. Based on the ratio of 0.1, the change height of the inner interface is determined to be 1000mm. Then, based on the change height of the inner interface and the initial oil layer thickness, the actual height of the current inner interface is determined to be 3000mm.
[0081] Based on the above-described method for identifying the internal interface height of a mechanical interface regulator, this invention also provides a system for identifying the internal interface height of a mechanical interface regulator. This system implements the aforementioned method for identifying the internal interface height of a mechanical interface regulator.
[0082] Figure 5 This is a schematic diagram of the internal interface height recognition system for a mechanical interface adjuster according to an embodiment of this application. Figure 5 As shown, the internal interface height recognition system for a mechanical interface adjuster according to an embodiment of the present invention includes: a scale 501 and an internal interface height recognition module 502.
[0083] Scale 501 is installed outside the adjusting screw of the mechanical interface regulator in the three-phase separator;
[0084] The inner interface height recognition module 502 is configured to determine the actual height of the inner interface based on the actual scale corresponding to the top surface of the screw, using a preset first and second relational formula, when adjusting the oil-water interface of the three-phase separator via a mechanical regulator. Specifically, a first relational formula is established based on the standard deviation of the height difference between the upper edge of the overflow plate corresponding to the three-phase separator and the upper edge of the regulating cylinder driven by the mechanical regulator, along with the oil-water density. A second relational formula is established based on the oil-water density to represent the relationship between the moving distance of the regulating cylinder and the floating distance of the inner interface.
[0085] Furthermore, the inner interface height recognition module 502 is also configured to determine the actual initial inner interface height based on the zero point of the scale using the first relationship, then calculate the inner interface change height based on the number of scale steps between the actual scale and the zero point using the second relationship, and finally obtain the current actual height of the inner interface based on the initial inner interface height and the inner interface change height.
[0086] Furthermore, the scale 501 is mounted on a sleeve outside the adjusting screw of the mechanical interface regulator in the three-phase separator.
[0087] This invention discloses a method and system for identifying the internal interface height of a mechanical interface regulator. The method and system utilize a graduated scale externally mounted on the adjusting screw of the mechanical interface regulator in a three-phase separator. Based on the standard deviation of the height difference between the upper edge of the overflow plate corresponding to the three-phase separator and the upper edge of the adjusting cylinder driven by the mechanical regulator, as well as the oil-water density, a first relationship is established representing the correspondence between the zero point of the scale and the actual initial internal interface height. Then, based on the oil-water density, a second relationship is established representing the correspondence between the moving distance of the adjusting cylinder and the floating distance of the internal interface. When adjusting and controlling the oil-water interface of the three-phase separator using the mechanical regulator, the actual height of the current internal interface is determined based on the actual scale corresponding to the top surface of the screw, using the first and second relationships. This invention achieves an indirect representation of the actual height of the current internal interface within a three-phase separator, reducing construction costs and further improving the accuracy of three-phase separator commissioning. In addition, as an accessory to the mechanical interface controller, the scale enables the mechanical interface controller to have the function of indirect visualization of the internal interface without the use of other automation devices and instruments. The scale is characterized by its simple and ingenious structure and stable operation. It can be configured in a simple and direct way outside the adjustment screw of most mechanical interface controllers, with low hardware cost and no maintenance required during operation.
[0088] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.
[0089] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0090] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0091] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.
[0092] The phrase "an embodiment" or "an embodiment" used in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" or "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.
[0093] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.
[0094] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection of this invention shall still be determined by the scope defined in the appended claims.
Claims
1. A method for identifying the internal interface height of a mechanical interface regulator, characterized in that, include: A graduated scale is configured on the outside of the adjusting screw of the mechanical interface regulator in the three-phase separator; Based on the standard deviation of the height difference between the upper edge of the overflow plate corresponding to the three-phase separator and the upper edge of the regulating cylinder driven by the mechanical regulator, and the oil-water density, a first relational formula is established to represent the correspondence between the zero point of the scale and the actual initial inner interface height. A second relationship is established based on the oil-water density to represent the correspondence between the moving distance of the regulating cylinder and the floating distance of the inner interface; When adjusting and controlling the oil-water interface of the three-phase separator using a mechanical regulator, the actual height of the current inner interface is determined based on the actual scale corresponding to the top surface of the screw, using the first and second relational formulas.
2. The method for identifying the height of the inner interface according to claim 1, characterized in that, The first relation is represented by the following expression: Where, ρ o ρ represents the density of oil. w H1 represents the water density, H1 represents the initial oil layer thickness used to characterize the actual initial internal interface height, and ΔH represents the standard deviation distance.
3. The method for identifying the height of the inner interface according to claim 2, characterized in that, The second relation is expressed by the following expression: Where N represents the ratio of the moving distance of the regulating cylinder to the floating distance of the inner interface, ΔH2 represents the moving distance of the regulating cylinder, and ΔH1 represents the floating distance of the inner interface.
4. The method for identifying the height of the inner interface according to any one of claims 1 to 3, characterized in that, The step of determining the actual height of the current inner interface based on the actual scale corresponding to the top surface of the screw, using the first and second relational formulas, includes: Based on the zero point of the scale, the actual initial inner interface height is determined using the first relationship. Based on the number of scale steps between the actual scale and the zero point, the change height of the inner interface is calculated using the second relationship. Based on the initial height of the inner interface and the changed height of the inner interface, the actual height of the current inner interface is obtained.
5. The method for identifying the height of the inner interface according to claim 3, characterized in that, The first relation is constructed through the following steps: When the mechanical regulator is in its initial position, the following first and second expressions exist respectively: r o gH2+p w gH2=ρ w gH H1 + H2 - H = ΔH In this expression, the first expression indicates that the water column pressure inside the regulating cylinder of the mechanical regulator is the sum of the oil layer pressure and the water layer pressure; the second expression indicates that the standard deviation distance is equal to the difference between the sum of the initial oil layer thickness and the initial water layer thickness and the initial height of the water column inside the regulating cylinder of the mechanical regulator; g represents the acceleration due to gravity; H2 represents the initial water layer thickness; and H represents the initial height of the water column inside the regulating cylinder. The first relation is obtained by substituting the second expression into the first expression and rearranging it.
6. The method for identifying the height of the inner interface according to claim 5, characterized in that, The second relation is constructed through the following steps: After the mechanical regulator performs interface adjustment control, the following third expression exists: r o g(H1+ΔH2)+ρ w g(H2-ΔH1)=ρ w g(H-ΔH2) The third expression indicates that the pressure change of the water column inside the regulating cylinder of the mechanical regulator is the sum of the pressure increase due to the increase in oil layer thickness and the pressure decrease due to the decrease in water layer thickness. Subtracting the first expression from the third expression yields the fourth expression, which, after simplification, leads to the second relational expression: (r o -r w )gΔH1=-ρ w gΔH2.
7. The method for identifying the height of the inner interface according to any one of claims 1 to 6, characterized in that, The scale is mounted on a sleeve outside the adjusting screw of the mechanical interface regulator in the three-phase separator.
8. A system for recognizing the internal interface height of a mechanical interface adjuster, characterized in that, The internal interface height recognition system is used to implement the internal interface height recognition method as described in any one of claims 1 to 7, wherein the internal interface height recognition system comprises: A scale, which is installed on the outside of the adjusting screw of the mechanical interface regulator in the three-phase separator; The inner interface height recognition module is configured to determine the actual height of the current inner interface based on the actual scale corresponding to the top surface of the screw, using a preset first and second relational formula, when the oil-water interface of the three-phase separator is adjusted and controlled by the mechanical regulator. The first relational formula is established based on the standard deviation distance of the height difference between the upper edge of the overflow plate corresponding to the three-phase separator and the upper edge of the regulating cylinder driven by the mechanical regulator, as well as the oil-water density, to represent the correspondence between the zero point of the scale and the actual initial inner interface height. The second relational formula is established based on the oil-water density to represent the correspondence between the moving distance of the regulating cylinder and the floating distance of the inner interface.
9. The internal interface height recognition system according to claim 8, characterized in that, The inner interface height recognition module is further configured to determine the actual initial inner interface height based on the zero point of the scale using the first relationship, then calculate the inner interface change height based on the number of scale steps between the actual scale and the zero point using the second relationship, and finally obtain the current actual height of the inner interface based on the initial inner interface height and the inner interface change height.
10. The internal interface height recognition system according to claim 8 or 9, characterized in that, The scale is mounted on a sleeve outside the adjusting screw of the mechanical interface regulator in the three-phase separator.