A method, system, apparatus, and medium for sizing a wedge gate valve device

Abstract

This invention belongs to the technical field of flexible wedge gate valve mechanical structure, specifically relating to a selection method, system, equipment, and medium for wedge gate valve components. The selection method for the wedge gate valve component includes: obtaining fixed parameter values ​​of the wedge gate valve; calculating the maximum axial force Q of the wedge gate valve stem based on the fixed parameter values, and obtaining the theoretical closing torque C of the electric actuator based on the maximum axial force Q; selecting the electric actuator based on the theoretical closing torque C; calculating the minimum cross-sectional area FT of the valve stem using the maximum axial force Q; determining whether the valve stem meets specifications based on the minimum cross-sectional area FT, and if not, re-selecting the valve stem. This invention improves the valve stem by optimizing the electric actuator's set torque and evaluating the valve stem's strength, avoiding problems such as electric actuator jamming, insufficient opening or closing force margin, and valve stem bending and breakage caused by unreasonable electric actuator set torque.

Description

Technical Field

[0001] This invention belongs to the technical field of flexible wedge gate valve mechanical structure, specifically relating to a selection method, system, equipment, and medium for wedge gate valve devices. Background Technology

[0002] The most common faults in flexible wedge gate valves are: improper setting of the electric actuator leading to jamming of the electric actuator, improper selection of the electric actuator resulting in insufficient opening or closing force margin, and bending or even breakage of the valve stem. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a method for selecting wedge gate valve devices, thereby optimizing the setting torque of the electric actuator and further evaluating the strength of the valve stem, and improving the valve stem through this method.

[0004] To achieve the above and other related objectives, the present invention provides a method for selecting a wedge gate valve device, comprising: obtaining fixed parameter values ​​of the wedge gate valve device; calculating the maximum axial force Q of the wedge gate valve stem based on the fixed parameter values, and calculating the theoretical closing torque C of the electric actuator of the wedge gate valve based on the maximum axial force Q; selecting the electric actuator based on the theoretical closing torque C; calculating the minimum cross-sectional area FT of the valve stem using the maximum axial force Q; determining whether the valve stem meets the specifications based on the minimum cross-sectional area FT, and if not, re-selecting the valve stem.

[0005] According to a specific embodiment of the present invention, the step of calculating the maximum axial force Q of the wedge gate valve stem based on the fixed parameter value, and obtaining the theoretical closing torque C of the wedge gate valve electric actuator based on the maximum axial force Q includes: calculating the valve sealing surface friction force Q1 of the wedge gate valve based on the fixed parameter value; calculating the valve stem unbalance force Q2 of the wedge gate valve based on the fixed parameter value; calculating the packing friction force Q3 of the wedge gate valve based on the fixed parameter value; summing the valve sealing surface friction force Q1, the valve stem unbalance force Q2, and the packing friction force Q3 to obtain the maximum axial force Q; and calculating the theoretical closing torque C based on the maximum axial force Q.

[0006] According to a specific embodiment of the present invention, the formula for calculating the frictional force Q1 of the valve sealing surface is as follows:

[0007]

[0008] Where θ is the semi-cone angle of the valve disc sealing surface, μ1 is the friction coefficient between the valve disc and the valve seat, Dt is the valve stem diameter, and ΔP is the pressure difference between the upstream and downstream of the valve.

[0009] According to a specific embodiment of the present invention, the formula for calculating the valve stem unbalanced force Q2 is as follows:

[0010]

[0011] Where Dt is the valve stem diameter and Pfonc is the valve system operating pressure.

[0012] According to a specific embodiment of the present invention, the step of calculating the packing friction force Q3 of the wedge gate valve based on the parameter value includes: determining the maximum working pressure value of the wedge gate valve stem: if 1.5 PMS is less than 100 bar, then Q3 = 10 × S; if 1.5 PMS is greater than 100 bar, then... Where S = π × Dt × h, S is the packing friction area, PMS is the maximum operating pressure of the valve system, Dt is the valve stem diameter, and h is the packing height.

[0013] According to a specific embodiment of the present invention, the formula for calculating the theoretical closing torque C is as follows:

[0014] C = 1.2 × TF × Q

[0015]

[0016]

[0017] Where TF is the valve stem factor, α is the valve stem thread helix angle, β is the valve stem trapezoidal thread half-cone angle, μ2 is the valve stem thread friction coefficient, μ3 is the bearing friction coefficient, Rm is the valve stem thread average radius, RMB is the bearing average radius, D is the valve stem thread nominal size, and Pp is the pitch.

[0018] According to a specific embodiment of the present invention, the formula for calculating the minimum cross-sectional area FT is as follows:

[0019]

[0020] Where, σ a This represents the allowable stress on the valve stem.

[0021] A selection system for a wedge gate valve includes: a parameter acquisition module for acquiring fixed parameter values ​​of the wedge gate valve; a first parameter calculation module for calculating the maximum axial force Q of the wedge gate valve stem based on the fixed parameter values, and calculating the theoretical closing torque C of the electric actuator of the wedge gate valve based on the maximum axial force Q; an electric actuator selection module for selecting the electric actuator based on the theoretical closing torque C; a second parameter calculation module for calculating the minimum cross-sectional area FT of the valve stem using the maximum axial force Q; and a valve stem evaluation module for determining whether the valve stem meets the specifications based on the minimum cross-sectional area FT, and if not, re-selecting the valve stem.

[0022] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of any of the methods described above.

[0023] A computer-readable medium having instructions stored thereon, the instructions being loaded by a processor and executed as described in any of the preceding claims.

[0024] The technical advantage of this invention lies in its ability to calculate the maximum axial force on the wedge gate valve stem and obtain the theoretical closing torque of the electric actuator, thereby enabling the selection of the appropriate electric actuator. Simultaneously, it calculates the minimum cross-sectional area of ​​the valve stem based on the maximum axial force, and performs a reverse evaluation to assess whether the valve stem meets specifications, allowing for a correct replacement. This ensures the normal operation of the wedge gate valve and avoids problems such as electric actuator jamming, insufficient opening or closing force margin, and valve stem bending and breakage caused by unreasonable electric actuator torque settings. This invention optimizes the electric actuator torque setting and further evaluates the strength of the valve stem, achieving an improvement in valve stem performance. Attached Figure Description

[0025] Figure 1 This is a flowchart illustrating a specific embodiment of the selection method for the wedge gate valve device provided by the present invention.

[0026] Figure 2 This is a structural diagram of a specific embodiment of the wedge gate valve provided by the present invention;

[0027] Figure 3 A flowchart illustrating a specific embodiment of the selection system for the wedge gate valve device provided by the present invention;

[0028] Figure 4 This is a structural block diagram of a specific embodiment of the electronic device provided by the present invention. Detailed Implementation

[0029] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0030] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0031] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.

[0032] First, it should be noted that, in order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described.

[0033] like Figure 2 As shown, the valve face friction of a wedge gate valve is the frictional resistance formed at the contact point between the valve stem end and the gate valve. The valve stem opens or closes the valve body passage of the gate valve through the movement of the upper and lower pistons. The frictional force between the valve face at the valve stem end and the valve body passage hinders the movement of the valve stem. The packing friction is the frictional resistance generated at the contact point between the middle section of the valve stem and the valve body of the gate valve. When the upper and lower pistons move, they will generate resistance on the valve stem. The valve stem unbalanced force is the axial resultant force of the fluid on the valve stem when the fluid pressure inside the valve is high, the pressure difference is large, and the flow velocity is fast. This unbalanced force directly affects the relationship between the valve stem and the closing torque of the electric actuator. Due to the influence of fluid dynamic pressure when the valve stem is in the middle position, the unbalanced force is difficult to express with a formula. Therefore, the static unbalanced force on the valve stem when the gate valve is fully closed is generally used as the basis. By integrating the valve surface friction, packing friction, and valve stem imbalance force as the maximum axial force of the valve stem, the closing torque of the electric actuator can be further calculated and optimized to avoid problems such as actuator jamming, insufficient opening or closing force margin of the electric actuator, valve stem bending, or even breakage.

[0034] Example 1

[0035] Please see Figure 1 As shown, a method for selecting a wedge gate valve device includes:

[0036] Step S10: Obtain the fixed parameter values ​​of the wedge gate valve device.

[0037] By collecting the calibration parameters and actual operating parameters of the wedge gate valve device, calculations are performed, and the electric actuator is selected based on the calculation results, ensuring the normal operation of the wedge gate valve. Furthermore, the valve stem can be evaluated in reverse to determine if it meets the actual specifications, allowing for timely replacement.

[0038] Step S20: Calculate the maximum axial force Q of the wedge gate valve stem based on the fixed parameter value, and calculate the theoretical closing torque C of the electric actuator of the wedge gate valve based on the maximum axial force Q.

[0039] The specific steps of the calculation are as follows:

[0040] The frictional force Q1 of the valve sealing surface of the wedge gate valve is calculated based on the fixed parameter values, and the calculation formula for the frictional force Q1 of the valve sealing surface is as follows:

[0041]

[0042] Where θ is the semi-cone angle of the valve disc sealing surface, μ1 is the friction coefficient between the valve disc and the valve seat, Dt is the valve stem diameter, and ΔP is the pressure difference between the upstream and downstream of the valve.

[0043] The unbalanced force Q2 of the wedge gate valve stem is calculated based on the fixed parameter values, and the formula for calculating the unbalanced force Q2 of the valve stem is as follows:

[0044]

[0045] Where Pfonc is the operating pressure of the valve system.

[0046] The packing friction force Q3 of the wedge gate valve is calculated based on the fixed parameter values, and the calculation formula for the packing friction force Q3 is as follows:

[0047] If the maximum working pressure of the valve stem is 1.5 PMS less than 100 bar, then the packing friction force Q3 = 10 × S;

[0048] If the maximum working pressure of the valve stem (1.5 PMS) is greater than 100 bar, then the packing friction force...

[0049] Further, the packing friction area S = π × Dt × h.

[0050] Where PMS is the maximum operating pressure of the valve system, and h is the packing height.

[0051] By calculating the frictional force of the valve sealing surface, the unbalanced force of the valve stem, and the frictional force of the packing, the maximum axial force Q on the valve stem is obtained. Then, the driving torque of the electric actuator of the wedge gate valve is calculated based on the maximum axial force Q of the valve stem, thus completing the selection of the electric actuator.

[0052] Where Q = Q1 + Q2 + Q3.

[0053] The theoretical closing torque C of the electric actuator is calculated based on the maximum axial force Q of the valve stem, and the formula for calculating the theoretical closing torque C is as follows:

[0054] C = 1.2 × TF × Q

[0055]

[0056]

[0057] Where TF is the valve stem factor, α is the valve stem thread helix angle, β is the valve stem trapezoidal thread half-cone angle, μ2 is the valve stem thread friction coefficient, μ3 is the bearing friction coefficient, Rm is the valve stem thread average radius, RMB is the bearing average radius, D is the valve stem thread nominal size, and Pp is the pitch.

[0058] Step S30: Select the electric actuator based on the theoretical closing torque C.

[0059] In this embodiment, the theoretical closing torque C of the electric actuator is used as the judgment value for selecting the electric actuator. According to the valve design manual, the selection torque of the electric actuator is 1.1-1.3 times the theoretical closing torque C. The theoretical closing torque C also fully considers the margin, so that the final selection result of the electric actuator meets the normal working standard of the wedge gate valve.

[0060] Step S40: Calculate the minimum cross-sectional area FT of the valve stem using the maximum axial force Q.

[0061] Specifically, in application, the maximum axial force of the valve stem is calculated using the parameter values ​​of the valve stem and the gate valve. The selection torque for the electric actuator is then calculated based on this maximum axial force. Simultaneously, the minimum cross-sectional area of ​​the valve stem can be calculated from the maximum axial force, allowing for reverse verification of whether the valve stem meets specifications and preventing damage during operation due to insufficient stem strength.

[0062] The minimum cross-sectional area FT of the valve stem is calculated based on the maximum axial force Q of the valve stem, and the formula for calculating the minimum cross-sectional area FT is as follows:

[0063]

[0064] Where, σ aThis represents the allowable stress on the valve stem.

[0065] Step S50: Determine whether the valve stem meets the specifications based on the minimum cross-sectional area FT; otherwise, reselect the valve stem.

[0066] The strength of the actual valve stem is evaluated based on the calculated minimum cross-sectional area of ​​the valve stem. If the actual valve stem does not meet the specifications, a new valve stem is selected to ensure the normal operation of the wedge gate valve and avoid malfunctions.

[0067] It should be noted that the steps of the various methods described above are only for clarity. In practice, they can be combined into one step or some steps can be split into multiple steps. As long as they contain the same logical relationship, they are all within the scope of protection of this patent. Adding insignificant modifications or introducing insignificant designs to the algorithm or process, but without changing the core design of the algorithm and process, are also within the scope of protection of this patent.

[0068] Example 2

[0069] Please see Figure 3 As shown in the embodiments of this application, a selection system for wedge gate valve devices is also provided, including:

[0070] The parameter acquisition module 10 is used to acquire the fixed parameter values ​​of the wedge gate valve device.

[0071] The first parameter calculation module 20 is used to calculate the maximum axial force Q of the wedge gate valve stem based on the fixed parameter value, and to calculate the theoretical closing torque C of the electric actuator of the wedge gate valve based on the maximum axial force Q.

[0072] The electric head selection module 30 is used to select the electric head based on the theoretical closing torque C.

[0073] The second parameter calculation module 40 is used to calculate the minimum cross-sectional area FT of the valve stem using the maximum axial force Q.

[0074] The valve stem evaluation module 50 determines whether the valve stem meets the specifications based on the minimum cross-sectional area FT; otherwise, it re-selects the valve stem.

[0075] It should be noted that the selection method for the wedge gate valve device provided in the above embodiments is based on the same concept as the wedge gate valve device selection method provided in Embodiment 1 above. The specific operation methods of each module and unit have been described in detail in the method embodiments and will not be repeated here. In practical applications, the wedge gate valve device selection method provided in Embodiment 1 above can be used to allocate the above functions to different functional modules as needed, that is, to divide the internal structure of the device into different functional modules to complete all or part of the functions described above. This is not a limitation here.

[0076] Example 3

[0077] Please see Figure 4 As shown, embodiments of this application also provide an electronic device, including a memory 2, a processor 1, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of any of the methods described above.

[0078] The memory includes at least one type of readable storage medium, such as flash memory, portable hard drive, multimedia card, card-type memory (e.g., SD or DX memory), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory can be an internal storage unit of an electronic device, such as a portable hard drive. In other embodiments, the memory can be an external storage device of the electronic device, such as a plug-in portable hard drive, Smart Media Card (SMC), Secure Digital (SD) card, FlashCard, etc. Furthermore, the memory can include both internal and external storage units of the electronic device. The memory can be used not only to store application software and various types of data installed on the electronic device, but also to temporarily store data that has been output or will be output.

[0079] In some embodiments, a processor may be composed of integrated circuits, such as a single packaged integrated circuit or multiple integrated circuits packaged with the same or different functions. This includes combinations of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor is the control unit of the electronic device, connecting various components of the device via various interfaces and lines. It executes programs or modules stored in the memory and calls data stored in the memory to perform various functions and process data within the electronic device.

[0080] The processor executes the operating system of the electronic device and various installed applications. The processor executes the applications to implement the steps in the above method embodiments.

[0081] For example, the computer program may be divided into one or more modules, which are stored in the memory and executed by the processor to complete the present invention. The one or more modules may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in the electronic device.

[0082] The integrated unit, implemented as a software functional module, can be stored in a computer-readable storage medium. This software functional module, stored in a storage medium, includes several instructions to cause a computer device (which may be a personal computer, computer equipment, or network device, etc.) or processor to execute some functions of the lithium battery cold solder joint detection method of the various embodiments of the present invention.

[0083] In summary, the technical advantage of this invention lies in calculating the maximum axial force on the wedge gate valve stem and obtaining the theoretical closing torque of the electric actuator, thereby completing the selection of the electric actuator. Simultaneously, based on the maximum axial force of the stem, the minimum cross-sectional area of ​​the stem is calculated, and the stem is evaluated in reverse to ensure it meets specifications. If a replacement is necessary, the correct selection is made, ensuring the normal operation of the wedge gate valve and avoiding problems such as electric actuator jamming, insufficient opening or closing force margin, and stem bending or breakage caused by unreasonable electric actuator torque settings. This invention optimizes the electric actuator torque setting and further evaluates the stem strength, achieving an improvement in the stem design.

[0084] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for selecting a wedge gate valve device, characterized in that, include: Obtain the fixed parameter values ​​of the wedge gate valve device; The maximum axial force Q of the wedge gate valve stem is calculated based on the fixed parameter values, and the theoretical closing torque C of the wedge gate valve electric actuator is calculated based on the maximum axial force Q. The steps include: calculating the valve sealing surface friction force Q1 of the wedge gate valve based on the fixed parameter values; calculating the valve stem unbalance force Q2 of the wedge gate valve based on the fixed parameter values; calculating the packing friction force Q3 of the wedge gate valve based on the fixed parameter values; summing the valve sealing surface friction force Q1, the valve stem unbalance force Q2, and the packing friction force Q3 to obtain the maximum axial force Q; and calculating the theoretical closing torque C based on the maximum axial force Q. The electric actuator is selected based on the theoretical closing torque C. The minimum cross-sectional area FT of the valve stem is calculated using the maximum axial force Q; Based on the minimum cross-sectional area FT, determine whether the valve stem meets the specifications; otherwise, reselect the valve stem. The formula for calculating the theoretical closing torque C is as follows: TF is the valve stem factor, α is the valve stem thread helix angle, and β is the valve stem trapezoidal thread half-cone angle. The coefficient of friction of the valve stem thread. Rm is the bearing friction coefficient, RMB is the average radius of the valve stem thread, D is the nominal size of the valve stem thread, and Pp is the pitch. The formula for calculating the minimum cross-sectional area FT is as follows: This represents the allowable stress on the valve stem.

2. The selection method for the wedge gate valve device according to claim 1, characterized in that, The formula for calculating the frictional force Q1 of the valve sealing surface is as follows: in, The semi-cone angle of the valve disc sealing surface. Δp is the coefficient of friction between the valve disc and the valve seat, Dt is the valve stem diameter, and ΔP is the pressure difference between the upstream and downstream sides of the valve.

3. The selection method for the wedge gate valve device according to claim 1, characterized in that, The formula for calculating the unbalanced force Q2 on the valve stem is as follows: Where Dt is the valve stem diameter and Pfonc is the valve system operating pressure.

4. The selection method for the wedge gate valve device according to claim 1, characterized in that, The step of calculating the packing friction force Q3 of the wedge gate valve based on the parameter value includes: Determine the maximum working pressure value of the wedge gate valve stem: If 1.5 PMS is less than 100 bar, then ; If 1.5 PMS is greater than 100 bar, then ; in, S is the packing friction area, PMS is the maximum operating pressure of the valve system, Dt is the valve stem diameter, and h is the packing height.

5. A selection system for wedge gate valve devices, characterized in that, include: The parameter acquisition module is used to obtain the fixed parameter values ​​of the wedge gate valve; The first parameter calculation module is used to calculate the maximum axial force Q of the wedge gate valve stem based on the fixed parameter values, and to obtain the theoretical closing torque C of the wedge gate valve electric actuator based on the maximum axial force Q. The steps include: calculating the valve sealing surface friction force Q1 of the wedge gate valve based on the fixed parameter values; calculating the valve stem unbalance force Q2 of the wedge gate valve based on the fixed parameter values; calculating the packing friction force Q3 of the wedge gate valve based on the fixed parameter values; summing the valve sealing surface friction force Q1, the valve stem unbalance force Q2, and the packing friction force Q3 to obtain the maximum axial force Q; and calculating the theoretical closing torque C based on the maximum axial force Q. The electric actuator selection module is used to select the electric actuator based on the theoretical closing torque C; The second parameter calculation module is used to calculate the minimum cross-sectional area FT of the valve stem using the maximum axial force Q; The valve stem evaluation module determines whether the valve stem meets the specifications based on the minimum cross-sectional area FT; otherwise, the valve stem is reselected. The formula for calculating the theoretical closing torque C is as follows: TF is the valve stem factor, α is the valve stem thread helix angle, and β is the valve stem trapezoidal thread half-cone angle. The coefficient of friction of the valve stem thread. Rm is the bearing friction coefficient, RMB is the average radius of the valve stem thread, D is the nominal size of the valve stem thread, and Pp is the pitch. The formula for calculating the minimum cross-sectional area FT is as follows: This represents the allowable stress on the valve stem.

6. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of the method according to any one of claims 1 to 4.

7. A computer-readable medium, characterized in that, It stores instructions that are loaded by a processor and executed as described in any one of claims 1 to 4.

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