CN115859535A - Design method and device of U-shaped adjusting ball valve - Google Patents
Design method and device of U-shaped adjusting ball valve Download PDFInfo
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Abstract
The application discloses a design method and a device of a U-shaped adjusting ball valve, and relates to the technical field of adjusting valve design. The method comprises the following steps: determining the flow coefficient, the caliber and the adjustable ratio of the U-shaped adjusting ball valve according to the model selection requirement, and calculating the ideal flow area and the ideal flow coefficient required by each opening degree in an ideal state; establishing a valve core rotation model, and deducing an overflow area calculation formula of the overflow area corresponding to each opening; establishing an overflow area calculation model of the U-shaped adjusting ball valve according to an overflow area calculation formula; obtaining the input design parameters of the U-shaped adjusting ball valve through an overflow area calculation model, and calculating the design overflow area and the design flow coefficient corresponding to each opening; and iteratively adjusting the design parameters until the comparison result meets a preset threshold value according to the ideal flow area and the design flow area and the comparison result of the ideal flow coefficient and the design flow coefficient.
Description
Technical Field
The application relates to the technical field of regulating valve design, in particular to a design method and a device of a U-shaped regulating ball valve.
Background
The ball valve is a valve in which a valve rod drives a ball valve core to rotate around the axis of the ball valve, and the valve core is usually a sphere which is designed to have a special hollow structure. The ball valve is originally used as a switch and a stop valve, and can be closed tightly only by rotating 90 degrees and using a small rotating torque. As the process has evolved, ball valves have been designed with ball regulating valves for throttling and controlling flow. When fluid flows through the ball-shaped regulating valve, the flow area formed by the valve core and the valve seat is locally reduced, so that local resistance (similar to an orifice plate) is generated, the pressure and the speed of the fluid are changed, and further energy loss of the fluid is caused. The working principle of the spherical regulating valve is that according to the size of the model, the flow area (the cross section area through which the fluid flows) of the fluid is changed by changing the stroke (opening degree) of the valve core, so that the resistance coefficient is changed to achieve the purpose of regulating the flow and the pressure. It is widely used in petroleum refining, long-distance pipeline, chemical industry, paper making, pharmacy, water conservancy, electric power, municipal administration, steel industry and other industries.
The selection of proper valves for different industry working conditions is crucial to fluid control. The valve core of the existing valve mostly depends on the past design experience in the design process, and the design flow is as follows: designing a product, trial-manufacturing a prototype, testing and verifying, adjusting parameters, changing a valve core opening, and testing and verifying, wherein multiple times of adjustment and repeated tests are needed, so that the trial-manufacturing period is long. In addition, the flow characteristic is an important technical index and parameter of the spherical regulating valve, and has very important significance for the application and the type selection of the spherical regulating valve. However, in the current valve design process, a wrong region exists in the selection of a checking formula (checking calculation of a valve flow coefficient and a valve opening degree) during the model selection of the regulating valve, and the control precision or speed of the selected valve is difficult to guarantee.
Disclosure of Invention
The embodiment of the application provides a design method and a device of a U-shaped adjusting ball valve, so that the problem that in the prior art, the design process of a valve core of a valve mostly depends on the past design experience, and the trial-manufacture period is long due to the fact that the valve core needs to be adjusted and tested repeatedly for many times is solved, and the design method of the valve core, which is convenient to debug and short in trial-manufacture period, is realized; checking formula has some error zones when selecting the type to the governing valve among the prior art, leads to the control accuracy or the speed of valve selection to be difficult to guarantee, and this application realizes a checking formula to U-shaped governing ball valve opening and flow area, can help reducing the error of valve selection.
In a first aspect, an embodiment of the present application provides a method for designing a U-shaped adjusting ball valve, including: determining the flow coefficient, the caliber and the adjustable ratio of the U-shaped adjusting ball valve according to the model selection requirement, and calculating the ideal flow area and the ideal flow coefficient required by each opening under an ideal state; establishing a valve core rotation model, and deducing an overflow area calculation formula of the overflow area corresponding to each opening; establishing an overflow area calculation model of the U-shaped adjusting ball valve according to the overflow area calculation formula; obtaining the input design parameters of the U-shaped regulating ball valve through the overflow area calculation model, and calculating the design overflow area and the design flow coefficient corresponding to each opening; and iteratively adjusting the design parameters until the comparison result meets a preset threshold value according to the ideal flow area, the design flow area and the comparison result of the ideal flow coefficient and the design flow coefficient.
With reference to the first aspect, in a first possible implementation manner, the valve core of the U-shaped adjusting ball valve is a U-shaped large opening, and a protrusion is arranged at the bottom end of the U-shaped adjusting ball valve.
With reference to the first aspect, in a second possible implementation manner, the formula for calculating the flow area includes: when it is at homeWhen the valve core opening of the U-shaped adjusting ball valve does not turn to the flow channel, the overflowing area A 1 The calculation formula is as follows: a. The 1 =0; in the formula, A 1 The flow area is the flow area when the valve core is opened and does not turn to the flow channel; when the top arc of the valve core opening of the U-shaped adjusting ball valve turns to the flow channel, the overflowing area A 2 The calculation formula is as follows:
With reference to the first aspect, in a third possible implementation manner, the design parameters include: the flow channel diameter, the spherical crown chord length, the spherical crown radius, the arc radius of the U-shaped opening, the width of the U-shaped opening and the included angle of the U-shaped opening. Maximum flow coefficient, regulation ratio.
In a second aspect, an embodiment of the present application provides a design apparatus for a U-shaped adjusting ball valve, including: the model selection module is used for determining the flow coefficient, the caliber and the adjustable ratio of the U-shaped adjusting ball valve according to the model selection requirement and calculating the ideal flow area and the ideal flow coefficient required by each opening in an ideal state; the derivation module is used for establishing a valve core rotation model and deriving an overflow area calculation formula of the overflow area corresponding to each opening; the overflow area calculation model module is used for establishing an overflow area calculation model of the U-shaped adjusting ball valve according to the overflow area calculation formula; the design module is used for obtaining the input design parameters of the U-shaped adjusting ball valve through the flow area calculation model and calculating the design flow area and the design flow coefficient corresponding to each opening; and the optimization module is used for iteratively adjusting the design parameters until the comparison result meets a preset threshold value according to the ideal flow area, the design flow area and the comparison result of the ideal flow coefficient and the design flow coefficient.
With reference to the second aspect, in a first possible implementation manner, the valve core of the U-shaped adjusting ball valve is a U-shaped large opening, and a protrusion is arranged at the bottom end of the U-shaped adjusting ball valve.
With reference to the second aspect, in a second possible implementation manner, the formula for calculating the overflow area includes: when the valve core opening of the U-shaped adjusting ball valve does not turn to the flow passage, the flow area A is 1 The calculation formula is as follows: a. The 1 =0; in the formula, A 1 The flow area when the valve core is opened and does not turn to the flow channel; when the top point of the valve core opening of the U-shaped adjusting ball valveWhen the circular arc turns to the flow passage, the flow area A 2 The calculation formula is as follows:
in the formula, A 2 The flow area, X, when the valve core is opened and the top arc is turned to the flow passage 1 Is the common chord length of circle C and circle O, R 2 Radius of flow passage circle O, R 1 Is the radius of a convex circle C of the U-shaped valve core, the circle C is the circle where the convex of the U-shaped valve core is positioned, the circle O is the circle where the flow passage of the spherical regulating valve is positioned, A 1 The flow area when the valve core is opened and does not turn to the flow channel; when the triangular area of the valve core opening of the U-shaped adjusting ball valve turns to the flow channel, the flow area A 3 The calculation formula is as follows:
(ii) a In the formula, A 3 The flow area when the triangular area of the valve core opening turns to the flow passage, A 1 The flow area when the valve core is opened and not turned to the flow passage, A 2 The flow area S when the valve core opening vertex arc turns to the flow passage 1 A sector area formed by the vertex of the triangular area and the rotating part>
Is the sector area formed by the valve core bulge and the triangular area transition section>
The increment of the flow area after the triangular area enters the flow passage, L 1 The distance between the vertex of the valve core triangle area and the flow passage, L 2 The idle stroke moving distance, L, of the valve core opening not entering the flow passage 3 The distance from the circular arc of the opening of the valve core to the flow channel is h, and the distance from the top of the triangular area of the valve core to the farthest point of the arch when the valve core turns to the flow channel is h; when the circular arc area of the valve core opening of the U-shaped adjusting ball valve turns to the flow channel, the overflowing area A 4 The calculation formula is as follows:
(ii) a In the formula，A 4 The flow area when the valve core is opened in the arc area and turns to the flow passage, A 3 The overflow area when the triangular area which is opened by the valve core is turned to the flow channel is changed>
The flow passage circle and the radius are R 3 The increment of the intersection area of two circles formed by the common chord length of the circle; wherein the radius is R 3 The circle of (a) coincides with the arc region; when the rectangular area of the valve core opening of the U-shaped adjusting ball valve turns to the flow channel, the flow area A 5 The calculation formula is as follows:
(ii) a In the formula, A 5 The flow area when the rectangular area of the valve core opening is turned to the flow channel, A 4 The flow area, T, when turning to the flow path is an arc area of the valve core opening 4 The moving distance of the rectangular area after entering the flow channel and parallel to the opening direction is B, the height of the rectangular area is B, and the position is selected>
The area increment of the rectangular area entering the flow channel is obtained; when the rectangular area of the valve core opening of the U-shaped adjusting ball valve does not pass through the flow channel, the flow area A 6 The calculation formula is as follows:
(ii) a In the formula, A 6 The flow area when the rectangular area of the valve core opening does not pass through the flow channel, A 5 The overflow area when the rectangular area which is opened by the valve core is turned to the flow channel>
After the rectangular area passes through the runner circle, the moving distance corresponds to the increment of the arch area; when the valve core opening of the U-shaped adjusting ball valve passes through the open flow channel, the flow area A 7 The calculation formula is as follows:
(ii) a In the formula, A 7 The flow area when the valve core opens the flow passage is A 6 Is a valve core openingWithout passing through the flow channel, S 7 Is the area of the overopening.
With reference to the second aspect, in a third possible implementation manner, the design parameters include: the flow channel diameter, the spherical crown chord length, the spherical crown radius, the arc radius of the U-shaped opening, the width of the U-shaped opening and the included angle of the U-shaped opening. Maximum flow coefficient, regulation ratio.
In a third aspect, an embodiment of the present application provides an apparatus, where the apparatus includes: a processor; a memory for storing processor-executable instructions; the processor, when executing the executable instructions, performs the method as described in the first aspect or any possible implementation manner of the first aspect.
In a fourth aspect, embodiments of the present application provide a non-transitory computer-readable storage medium, which includes a program or instructions for storing a computer program or instructions, which, when executed, cause a method according to the first aspect or any one of the possible implementations of the first aspect to be implemented.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
according to the valve element design method, the design method of the U-shaped adjusting ball valve is adopted, the overflowing area calculation model is utilized, the problems that in the prior art, the design process of the valve element of the valve depends on past design experience, adjustment is needed for many times, and repeated tests are needed, so that the trial-production period is long are solved, the valve element design method which is convenient to debug and short in trial-production period is realized, a large amount of manpower and funds can be saved, and the design efficiency and the accuracy of products are improved. The check formula of area of overflowing has solved among the prior art when selecting the type to the regulating valve and has had some error zones, leads to the problem that the control accuracy or the speed of valve selection are difficult to guarantee, has realized one kind and has adjusted the check formula of ball valve opening and area of overflowing to the U-shaped, can reduce the error of valve selection type in-process.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method for designing a U-shaped adjusting ball valve according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a design device of a U-shaped adjusting ball valve provided by an embodiment of the application;
FIG. 3 is a schematic structural diagram of a U-shaped adjusting ball valve provided in the embodiment of the present application;
FIG. 4 is a schematic diagram illustrating a change of an area of flow during rotation of a valve core of the U-shaped adjusting ball valve provided by the embodiment of the present application;
fig. 5A and 5B are exploded schematic views illustrating an area of flow passing during rotation of a spool of a U-shaped ball valve according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart of a method for designing a U-shaped adjusting ball valve according to an embodiment of the present application, and includes steps 101 to 105. Fig. 1 is only an execution sequence shown in the embodiment of the present application, and does not represent the only execution sequence of the design method of the U-shaped adjusting ball valve, and the steps shown in fig. 1 may be executed in parallel in the case that the final result can be achieved.
Step 101: and determining the flow coefficient, the caliber and the adjustable ratio of the U-shaped adjusting ball valve according to the model selection requirement, and calculating the ideal flow area and the ideal flow coefficient required by each opening under an ideal state. Step 101 specifically includes that a valve core of the U-shaped adjusting ball valve is a U-shaped large opening, and a protrusion is arranged at the bottom end of the U-shaped large opening, as shown in fig. 3, the U-shaped large opening adjusting ball valve described in the present application has a U-shaped opening towards the right, and a small protrusion is arranged at the bottom end of the left side. The U-shaped adjusting ball valve is closer to equal percentage characteristics due to the protrusion at the bottom end of the valve core, and the shearing effect of the valve core is enhanced. The ideal state, i.e. the constant pressure difference across the regulating valve, is also called the ideal flow characteristic of the regulating valve. The relationship between the flow and the valve stem displacement (opening) is completely dependent on the structural parameters of the valve, with a constant differential pressure across the regulating valve. In practical applications, the change in the flow rate of the regulating valve causes a change in the resistance of the piping system, so that the pressure inside the valve changes, resulting in a constant change in the pressure difference across the valve. Therefore, in practical applications, no valve can fully satisfy the ideal flow characteristics, and the closer the flow characteristics of the valve are to the ideal flow characteristics, the better the valve performance is. The calculation method of the ideal flow area and the ideal flow coefficient required for each opening degree calculated here is well known in the art, and is not specifically described and limited here.
Step 102: and establishing a valve core rotation model, and deducing an overflow area calculation formula of the overflow area corresponding to each opening. Step 102 is specifically, for example, establishing a valve core rotation model as shown in fig. 4, decomposing an overflow area formed by intersection of the valve core and the flow channel in the rotation process, and deriving an overflow area calculation formula in stages. When the valve core opening of the U-shaped adjusting ball valve does not turn to the flow channel, and the valve is in a closed state, the overflowing area A is formed 1 The calculation formula is as follows: a. The 1 =0; in the formula, A 1 The flow area is the flow area when the valve core is opened and does not turn to the flow channel; when the circular arc of the top point of the valve core opening of the U-shaped adjusting ball valve turns to the flow channel, namely the convex turning flow channel in the valve core, as shown in fig. 5A, the current flowing area is decomposed into two circles which are intersected, in the embodiment of the application, the current flowing area A 2 The calculation formula is as follows:
in the formula, A 2 The flow area, X, when the valve core is opened and the top arc is turned to the flow passage 1 Of circle C and circle OCommon chord length, R 2 Radius of flow passage circle O, R 1 Is the radius of a convex circle C of the U-shaped valve core, the circle C is the circle where the convex of the U-shaped valve core is positioned, the circle O is the circle where the flow passage of the spherical regulating valve is positioned, A 1 The flow area is the flow area when the valve core is opened and does not turn to the flow channel; when the triangular area of the valve core opening of the U-shaped adjusting ball valve turns to the flow passage, the flow area at this time is shown as an area filled by a left lower sparse oblique line in fig. 4, and as shown in fig. 5B, the flow area is decomposed into A 2 Added to the area of the sector, and the sector can be decomposed into a triangle and a bow, so the overflow area A 3 The calculation formula is as follows:
(ii) a In the formula, A 3 The flow area when the triangular area of the valve core opening turns to the flow passage, A 1 The flow area S when the valve core is opened and does not turn to the flow passage 1 A sector area formed by the apex of the triangular area and the rotating part>
Is the sector area formed by the valve core bulge and the triangular area transition section,
Step 103: and establishing an overflow area calculation model of the U-shaped adjusting ball valve according to an overflow area calculation formula. Step 103 is specifically to establish an overflow area calculation model by using computer programming according to the overflow area calculation formula derived in step 102. In the embodiment of the application, a windows window application program compiled by adopting Visual Basic language is used for solving the flow characteristic parameters of the U-shaped large-opening regulating ball valve under different opening degrees, the method can be suitable for the derivation of models with complicated opening structures, more geometric parameters of shapes and complicated model solution, only needs one derivation, and can quickly and accurately solve the valve flow coefficients under different opening designs by carrying out computer programming on a solving formula, so that the method is convenient and fast, and can save a large amount of trial-production time.
Step 104: and obtaining the input design parameters of the U-shaped adjusting ball valve through an overflow area calculation model, and calculating the design overflow area and the design flow coefficient corresponding to each opening. Step 104 specifically includes inputting design parameters of the U-shaped adjusting ball valve in the flow area calculation model established in step 103, where the design parameters include: the flow channel diameter, the spherical crown chord length, the spherical crown radius, the arc radius of the U-shaped opening, the width of the U-shaped opening and the included angle of the U-shaped opening. The maximum flow coefficient, the regulation ratio and the like, and the design flow area and the design flow coefficient corresponding to each opening degree are calculated.
Step 105: and iteratively adjusting the design parameters until the comparison result meets a preset threshold value according to the ideal overflowing area and the design overflowing area and the comparison result of the ideal flow coefficient and the design flow coefficient. Step 105 is to compare the designed flow area and the designed flow coefficient in step 104 with the ideal flow area and the ideal flow coefficient in step 101, and continuously adjust the design parameters until the comparison result meets a preset threshold, i.e. the designed valve is close to the rational flow characteristic.
Although the present application provides method steps as described in an embodiment or flowchart, additional or fewer steps may be included based on routine or non-inventive labor. The sequence of steps recited in this embodiment is only one of many steps performed and does not represent a unique order of execution. When an actual apparatus or client product executes, it can execute sequentially or in parallel (e.g., in the context of parallel processors or multi-threaded processing) according to the methods shown in this embodiment or the figures.
As shown in fig. 2, the embodiment of the present application further provides a design device 200 of the U-shaped adjusting ball valve. The device includes: the system comprises a model selection module 201, a derivation module 202, a flow area calculation model module 203, a design module 204 and an optimization module 205. The method comprises the following specific steps:
the model selection module 201 is configured to determine a flow coefficient, a caliber, and an adjustable ratio of the U-shaped adjusting ball valve according to model selection requirements, and calculate an ideal flow area and an ideal flow coefficient required by each opening in an ideal state. The model selection module 201 is specifically configured for an ideal state, i.e., a constant differential pressure across the regulator valve, also referred to as an ideal flow characteristic of the regulator valve. Under the condition of constant differential pressure at two ends of the regulating valve, the relationship between the flow and the displacement (opening degree) of the valve rod completely depends on the structural parameters of the valve. The case of U-shaped regulation ball valve is the big opening of U-shaped, and the U-shaped bottom is equipped with the arch, as shown in figure 3 be this application the big opening of U-shaped regulation ball valve, case U-shaped opening is right, and the left side bottom is equipped with little arch. The U-shaped adjusting ball valve is closer to the equal percentage characteristic due to the bulge at the bottom end of the valve core, and the shearing effect of the valve core is enhanced.
The derivation module 202 is configured to establish a valve core rotation model and derive an area calculation formula of the area corresponding to each opening. The derivation module 202 is specifically configured to establish a valve core rotation model as shown in fig. 4, decompose an area of flow formed by intersection of the valve core and the flow channel during rotation, and derive a calculation formula of the area of flow in stages.
The overflow area calculation model module 203 is configured to establish an overflow area calculation model of the U-shaped ball valve according to the overflow area calculation formula. The flow area calculation model module 203 is specifically used for establishing a flow area calculation model by using computer programming, solving the flow characteristic parameters of the U-shaped large-opening regulating ball valve under different opening degrees, and can be applied to derivation of models with complicated opening structures, more geometric parameters of shapes and complicated model solution, only one derivation is needed, and the flow coefficients of valves under different opening designs can be rapidly and accurately solved by performing computer programming on a solving formula, so that the flow area calculation model module is convenient and fast, and can save a large amount of trial-production time.
The design module 204 is configured to obtain the input design parameters of the U-shaped adjusting ball valve through the flow area calculation model, and calculate a design flow area and a design flow coefficient corresponding to each opening. The design module 204 is specifically configured to input design parameters of the U-shaped adjusting ball valve into the flow area calculation model module 203, where the design parameters include: the flow channel diameter, the spherical crown chord length, the spherical crown radius, the arc radius of the U-shaped opening, the width of the U-shaped opening and the included angle of the U-shaped opening. The maximum flow coefficient, the regulation ratio and the like, and the design flow area and the design flow coefficient corresponding to each opening degree are calculated.
The optimization module 205 is configured to iteratively adjust the design parameter until the comparison result meets a preset threshold according to the ideal flow area and the design flow area, and the comparison result between the ideal flow coefficient and the design flow coefficient. The optimization module 205 is specifically configured to compare the design flow area and the design flow coefficient in the design module 204 with the ideal flow area and the ideal flow coefficient in the model selection module 201, and continuously adjust the design parameters until the comparison result meets a preset threshold, even if the designed valve is close to the rational flow characteristic.
Some of the modules in the apparatus described herein may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, classes, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
The apparatus or module described in the embodiments of the application may be implemented by a computer chip or an entity, or by a product with certain functions. For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. The functions of the modules can be implemented in the same or multiple software and/or hardware when implementing the embodiments of the present application. Of course, a module that implements a certain function may be implemented by a plurality of sub-modules or sub-units in combination.
The methods, apparatus or modules described herein may be implemented in a computer readable program code means for a controller in any suitable manner, for example, the controller may take the form of, for example, a microprocessor or processor and a computer readable medium storing computer readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, application Specific Integrated Circuits (ASICs), programmable logic controllers and embedded microcontrollers, examples of which include, but are not limited to, the following microcontrollers: ARC 625D, atmel AT91SAM, microchipPIC18F26K20, and Silicone Labs C8051F320, the memory controller may also be implemented as part of the control logic for the memory. Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may therefore be considered as a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.
An embodiment of the present application further provides an apparatus, including: a processor; a memory for storing processor-executable instructions; when the processor executes the executable instructions, the method according to the embodiment of the application is realized.
Embodiments of the present application also provide a non-transitory computer-readable storage medium having stored thereon a computer program or instructions, which when executed, cause a method as described in embodiments of the present application to be implemented.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing module, or each of the modules may exist alone, or two or more modules may be integrated into one module.
The storage medium includes, but is not limited to, a Random Access Memory (RAM), a Read-Only Memory (ROM), a Cache, a Hard disk (Hard disk), or a Memory card (HDD). The memory may be used to store computer program instructions.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus necessary hardware. Based on such understanding, the technical solutions of the present application may be embodied in the form of software products or in the implementation process of data migration, which essentially or partially contributes to the prior art. The computer software product may be stored in a storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, mobile terminal, server, or network device, etc.) to perform the methods described in the various embodiments or portions of the embodiments of the present application.
The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. All or portions of the present application are operational with numerous general purpose or special purpose computing system environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet-type devices, mobile communication terminals, multiprocessor systems, microprocessor-based systems, programmable electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure.
Claims (7)
1. A design method of a U-shaped adjusting ball valve is characterized by comprising the following steps:
determining the flow coefficient, the caliber and the adjustable ratio of the U-shaped adjusting ball valve according to the model selection requirement, and calculating the ideal flow area and the ideal flow coefficient required by each opening under an ideal state;
establishing a valve core rotation model, and deducing an overflow area calculation formula of the overflow area corresponding to each opening;
establishing an overflow area calculation model of the U-shaped adjusting ball valve according to the overflow area calculation formula;
obtaining the input design parameters of the U-shaped regulating ball valve through the overflow area calculation model, and calculating the design overflow area and the design flow coefficient corresponding to each opening;
and iteratively adjusting the design parameters until the comparison result meets a preset threshold value according to the ideal flow area, the design flow area and the comparison result of the ideal flow coefficient and the design flow coefficient.
2. The method according to claim 1, wherein the valve core of the U-shaped regulating ball valve is a U-shaped large opening, and the bottom end of the U-shape is provided with a bulge.
3. The method of claim 1, wherein the flow area calculation formula comprises:
when the valve core opening of the U-shaped adjusting ball valve does not turn to the flow passage, the flow area A is 1 The calculation formula is as follows: a. The 1 =0; in the formula, A 1 The flow area is the flow area when the valve core is opened and does not turn to the flow channel;
when the top arc of the valve core opening of the U-shaped adjusting ball valve turns to the flow channel, the overflowing area A 2 The calculation formula is as follows:
in the formula, A 2 The flow area, X, when the valve core is opened and the top arc is turned to the flow passage 1 Is the common chord length of circle C and circle O, R 2 Radius of flow passage circle O, R 1 Is the radius of a convex circle C of the U-shaped valve core, the circle C is the circle where the convex of the U-shaped valve core is positioned, the circle O is the circle where the flow passage of the spherical regulating valve is positioned, A 1 The flow area is the flow area when the valve core is opened and does not turn to the flow channel;
when the triangular area of the valve core opening of the U-shaped adjusting ball valve turns to the flow channel, the flow area A 3 The calculation formula is as follows:
(ii) a In the formula, A 3 The flow area when the triangular area of the valve core opening turns to the flow passage, A 1 The flow area when the valve core is opened and not turned to the flow passage, A 2 The flow area S when the valve core is opened and the top arc turns to the flow passage 1 A sector area formed by the vertex of the triangular area and the rotating part>
Is the sector area formed by the valve core bulge and the triangular area transition section>
Is the increment of the flow area after the triangular area enters the flow passage, L 1 The distance between the vertex of the valve core triangle area and the flow passage, L 2 The idle stroke moving distance, L, of the valve core opening not entering the flow passage 3 The distance from the circular arc of the opening of the valve core to the flow channel is h, and the distance from the top of the triangular area of the valve core to the farthest point of the arch when the valve core turns to the flow channel is h;
when the circular arc area of the valve core opening of the U-shaped adjusting ball valve turns to the flow channel, the overflowing area A 4 The calculation formula is as follows:
(ii) a In the formula, A 4 The flow area when the valve core is opened in the arc area and turns to the flow passage, A 3 The overflow area when the triangular area which is opened by the valve core is turned to the flow channel is changed>
The flow passage circle and the radius are R 3 The increment of the intersection area of the two circles formed by the common chord length of the circle; wherein the radius is R 3 The circle of (a) coincides with the arc region;
when the rectangular area of the valve core opening of the U-shaped adjusting ball valve turns to the flow channel, the flow area A 5 The calculation formula is as follows:
(ii) a In the formula, A 5 The flow area when the rectangular area of the valve core opening is turned to the flow channel, A 4 The flow area, T, when turning to the flow path is an arc area of the valve core opening 4 The moving distance of the rectangular area after entering the flow channel and parallel to the opening direction is B, the height of the rectangular area is B, and the position is selected>
The area increment of the rectangular area entering the flow channel is obtained; />
When the rectangular area of the valve core opening of the U-shaped adjusting ball valve does not pass through the flow channel, the flow area A 6 The calculation formula is as follows:
(ii) a In the formula, A 6 The rectangular area of the valve core opening does not pass through the flow passage 5 The overflow area when the rectangular area which is opened by the valve core is turned to the flow channel>
After the rectangular area passes through the runner circle, the moving distance corresponds to the increment of the arch area;
when the valve core opening of the U-shaped adjusting ball valve passes through the open flow channel, the flow area A 7 The calculation formula is as follows:
(ii) a In the formula, A 7 The flow area when the valve core opens the flow passage is A 6 The overflow area of the valve core opening when the flow channel is not overflowed>
Is the area of the overopening.
4. The method of claim 1, wherein the design parameters comprise: the flow channel diameter, the spherical crown chord length, the spherical crown radius, the arc radius of the U-shaped opening, the width of the U-shaped opening, the included angle of the U-shaped opening, the maximum flow coefficient and the regulation ratio.
5. A design device of a U-shaped adjusting ball valve is characterized by comprising:
the model selection module is used for determining the flow coefficient, the caliber and the adjustable ratio of the U-shaped adjusting ball valve according to the model selection requirement and calculating the ideal flow area and the ideal flow coefficient required by each opening in an ideal state;
the derivation module is used for establishing a valve core rotation model and deriving an overflow area calculation formula of the overflow area corresponding to each opening;
the overflow area calculation model module is used for establishing an overflow area calculation model of the U-shaped adjusting ball valve according to the overflow area calculation formula;
the design module is used for obtaining the input design parameters of the U-shaped adjusting ball valve through the flow area calculation model and calculating the design flow area and the design flow coefficient corresponding to each opening;
and the optimization module is used for iteratively adjusting the design parameters until the comparison result meets a preset threshold value according to the ideal flow area, the design flow area and the comparison result of the ideal flow coefficient and the design flow coefficient.
6. An apparatus, comprising:
a processor;
a memory for storing processor-executable instructions;
the processor, when executing the executable instructions, implements the method of any of claims 1 to 4.
7. A non-transitory computer-readable storage medium comprising instructions for storing a computer program or instructions that, when executed, cause the method of any one of claims 1 to 4 to be implemented.
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