Optimization method for hydrodynamic load coefficient of water delivery valve

Abstract

The invention relates to the technical field of water conservancy projects, in particular to a water delivery valve hydrodynamic load coefficient optimization method, which comprises the following steps: acquiring hydrodynamic information in a water delivery system under different valve opening degrees; wherein the hydrodynamic information comprises valve well water level information and valve rear pressure information; constructing a hydrodynamic model according to the hydrodynamic information; wherein the hydrodynamic model is used for representing hydrodynamic loads of the valve under different working conditions; randomly generating a plurality of hydrodynamic load coefficient optimization alternative schemes through the hydrodynamic model; based on a preset hydrodynamic load coefficient model, simulating each hydrodynamic load coefficient optimization alternative scheme to obtain an evaluation result corresponding to each hydrodynamic load coefficient optimization alternative scheme; and selecting an optimal scheme according to the evaluation result corresponding to each hydrodynamic load coefficient optimization alternative scheme, and determining the hydrodynamic load coefficient.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering, and in particular to a method for optimizing the hydrodynamic load coefficient of a water delivery valve. Background Art

[0002] In the operation of modern water supply systems, the stability and safety of valves are particularly important. Especially in large water supply pipelines or ship locks, valves often need to cope with various complex working conditions, which bring many challenges to the operation of valves. The change of hydrodynamic load is particularly significant during the opening and closing process of valves, especially under dynamic closing conditions. The impact of hydrodynamic load often brings huge pressure to the safe operation of valves.

[0003] In actual operation, the dynamic closing conditions of ship lock valves can be divided into two categories: the first type occurs at the end of water delivery, and the valve needs to be closed in advance in order to control the increase or decrease of the inertia of the lock chamber. Under this condition, the inertia of the water flow is small, the hydrodynamic load on the valve is relatively low, and no harmful hydraulic phenomena will occur. However, the second type of condition occurs during the opening of the valve. When the valve needs to be closed urgently due to special reasons, the complexity of valve operation increases significantly.

[0004] Under the second type of working condition, the inertia of the water flow will suddenly change dramatically, and the water flow in the corridor may produce negative water shock waves. This phenomenon will cause the pressure before the valve to rise rapidly, while the pressure after the valve will drop sharply, forming a large pressure difference, which will cause the hydrodynamic load on the valve to increase sharply. This drastic pressure change will cause the working conditions of the valve to deteriorate rapidly, increasing the risk of valve structure failure. If the hydrodynamic load on the valve exceeds its design load-bearing capacity, it may cause valve damage and even affect the safe operation of the entire water supply system. Summary of the invention

[0005] The purpose of the present invention is to provide a method for optimizing the hydrodynamic load coefficient of a water delivery valve in view of the problem that in the prior art, the hydrodynamic load of a water delivery valve changes sharply during the opening and closing process, causing the hydrodynamic load borne by the valve to exceed its designed bearing capacity.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A method for optimizing the hydrodynamic load coefficient of a water delivery valve, the method comprising:

[0008] Obtaining the hydrodynamic information in the water delivery system under different valve openings; wherein the hydrodynamic information includes the valve well water level information and the pressure information after the valve;

[0009] Constructing a hydrodynamic model according to the hydrodynamic information; wherein the hydrodynamic model is used to characterize the hydrodynamic load of the valve under different working conditions;

[0010] Through the hydrodynamic model, several optimization alternatives of hydrodynamic load coefficients are randomly generated;

[0011] Based on the preset hydrodynamic load coefficient model, each hydrodynamic load coefficient optimization alternative is simulated to obtain the evaluation result corresponding to each hydrodynamic load coefficient optimization alternative;

[0012] According to the evaluation results corresponding to each hydrodynamic load coefficient optimization alternative scheme, the optimal scheme is selected to determine the hydrodynamic load coefficient.

[0013] The present invention is a method for optimizing the hydrodynamic load coefficient of a water delivery valve. The method first obtains hydrodynamic information under different valve openings and constructs a hydrodynamic model through the hydrodynamic information. The hydrodynamic model can intuitively show the change of water flow in the water delivery system, so as to improve the accuracy of subsequent confirmation of the hydrodynamic load coefficient. The hydrodynamic model generates a plurality of alternative schemes for optimizing the hydrodynamic load coefficient. By simulating a plurality of alternative schemes, the designer can clearly and intuitively find the optimal scheme for optimizing the hydrodynamic load coefficient, and optimize the valve through the hydrodynamic load coefficient in the scheme to ensure that the valve can work under high load conditions, thereby ensuring the safety and stability of the valve and reducing the risk of valve failure. At the same time, by bringing a plurality of alternative schemes for optimizing the hydrodynamic load coefficient into a preset hydrodynamic load coefficient model for evaluation, the results obtained from the alternative schemes for optimizing the hydrodynamic load coefficient are clearly compared, and the optimal scheme is finally obtained. The hydrodynamic load coefficient is determined through the most optimal scheme, so that the designer can optimize the valve according to the environmental factors of the water delivery system where the valve is located, thereby improving the service life of the valve and avoiding damage to the valve.

[0014] As a preferred embodiment of the present invention, the method further comprises:

[0015] Obtaining energy loss information in the water delivery system, wherein the energy loss information includes flow rate loss information and acceleration loss information;

[0016] A mathematical model of valve well water head is constructed based on energy loss information.

[0017] As a preferred embodiment of the present invention, the valve well water head mathematical model is:

[0018]

[0019] Where: H ω is the valve well water level; 1is the resistance coefficient of water flow before the valve; V is the average flow velocity of the corridor section at the valve; L′ is the inertia conversion length of the corridor before the valve; g is the acceleration of gravity; H 1 It is the water level in the corridor section before the valve.

[0020] As a preferred embodiment of the present invention, the method further comprises:

[0021] Construct a mathematical model of the pressure after the valve;

[0022] Based on the mathematical model of the pressure behind the valve, the mathematical model of the water head acting on the valve is obtained;

[0023] According to the mathematical model of the water head acting on the valve, the hydrodynamic load coefficient model is obtained.

[0024] As a preferred embodiment of the present invention, the mathematical model of the pressure after the valve is:

[0025]

[0026] In the formula: In the formula: is the pressure head after the valve; H′ T is the initial hydrostatic pressure head at the top of the valve gallery; is the head loss related to the reaction rate; ξ 2 is the local resistance loss coefficient; ξ v ' n is the correction coefficient of the local velocity in the flow; α is the additional correction factor; It is the additional head loss caused by the change of fluid momentum.

[0027] As a preferred embodiment of the present invention, the mathematical model of the water head acting on the valve is:

[0028]

[0029] Where: ΔH is the water head that the valve bears; H ω is the valve well water level; is the pressure behind the valve.

[0030] As a preferred embodiment of the present invention, the hydrodynamic load coefficient model is:

[0031]

[0032] Where: ΔH is the water head that the valve bears; H 0 It is the initial working head of the valve.

[0033] As a preferred embodiment of the present invention, the valve opening n is 0.1 to 1.0.

[0034] As a preferred embodiment of the present invention, the method includes optimizing the hydrodynamic load coefficient model under water-filled conditions by setting the valve opening n to a value between 0.1 and 1.0 to determine the hydrodynamic load coefficient suitable for water-filled conditions.

[0035] As a preferred embodiment of the present invention, the method includes optimizing the hydrodynamic load coefficient model under the water discharge condition by setting the valve opening n to a value between 0.1 and 1.0 to determine the hydrodynamic load coefficient suitable for the water discharge condition.

[0036] As a preferred solution of the present invention, the valve divides the water delivery system into a corridor section in front of the valve and a corridor section behind the valve. A plurality of first pressure sensors are provided in the corridor section in front of the valve, and the pressure value of the corridor section in front of the valve under different valve openings n can be monitored in real time through the first pressure sensors;

[0037] A plurality of second pressure sensors are arranged in the corridor section behind the valve, and the pressure value of the corridor section behind the valve under different valve openings n can be monitored in real time through the second pressure sensors.

[0038] As a preferred solution of the present invention, a flow sensor is further provided in the corridor section in front of the valve, through which the water flow rate of the corridor section in front of the valve can be monitored in real time, and the hydrodynamic load of the corridor section in front of the valve can be accurately determined by combining the pressure value and the change trend of the flow rate;

[0039] A flow rate sensor is also provided in the corridor section behind the valve. The water flow rate in the corridor section behind the valve is monitored in real time by the flow rate sensor and combined with the flow rate information in the corridor section in front of the valve to further optimize the hydrodynamic load coefficient model of the valve and ensure the stable operation of the valve under different working conditions.

[0040] An electronic device comprises at least one processor and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute any of the methods described above.

[0041] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0042] 1. The present invention is a method for optimizing the hydrodynamic load coefficient of a water delivery valve. The method first obtains hydrodynamic information under different valve openings and constructs a hydrodynamic model through the hydrodynamic information. The hydrodynamic model can intuitively show the change of water flow in the water delivery system, so as to improve the accuracy of the subsequent confirmation of the hydrodynamic load coefficient. The hydrodynamic model generates several alternative schemes for optimizing the hydrodynamic load coefficient. By simulating multiple alternative schemes, the designer can clearly and intuitively find the optimal scheme for optimizing the hydrodynamic load coefficient, and optimize the valve through the hydrodynamic load coefficient in the scheme to ensure that the valve can work under high load conditions, ensure the safety and stability of the valve, and reduce the risk of valve failure. At the same time, by bringing multiple alternative schemes for optimizing the hydrodynamic load coefficient into a preset hydrodynamic load coefficient model for evaluation, the results obtained from the alternative schemes for optimizing the hydrodynamic load coefficient are clearly compared, and the optimal scheme is finally obtained. The hydrodynamic load coefficient is determined through the most appropriate scheme, so that the designer can optimize the valve according to the environmental factors of the water delivery system where the valve is located, thereby improving the service life of the valve and avoiding damage to the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a flow chart of a method for determining a hydrodynamic load coefficient of a water delivery valve of the present invention;

[0044] Figure 2 It is a table of pressure changes of the corridor section in front of the valve at various valve openings under the water-filled working condition of the present invention;

[0045] Figure 3 It is a table of pressure changes of the corridor section behind the valve at various valve openings under the water-filled working condition of the present invention;

[0046] Figure 4 It is a table of changes in hydrodynamic load coefficients corresponding to the openings of various valves under water-filled working conditions of the present invention;

[0047] Figure 5 It is a relationship table between valve opening and hydrodynamic load coefficient under water filling condition of the present invention;

[0048] Figure 6 It is a table of pressure changes of the corridor section in front of the valve at various valve openings under the water discharge working condition of the present invention;

[0049] Figure 7 It is a table of pressure changes in the corridor section behind the valve at various valve openings under the water discharge working condition of the present invention;

[0050] Figure 8 It is a table of changes in the hydrodynamic load coefficients corresponding to the openings of various valves under the water discharge working condition of the present invention;

[0051] Fig. 9 It is a relationship table between valve opening and hydrodynamic load coefficient under the water discharge working condition of the present invention;

[0052] Fig.10 It is an electronic device described in Example 5 of the present invention that utilizes the method for optimizing the hydrodynamic load coefficient of a water delivery valve described in Example 1. DETAILED DESCRIPTION

[0053] The present invention is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0054] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all based on the expression of the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0055] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0056] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0057] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0058] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0059] Example 1

[0060] like Figure 1 A method for optimizing the hydrodynamic load coefficient of a water delivery valve is shown, the method comprising:

[0061] Obtaining the hydrodynamic information in the water delivery system under different valve openings; wherein the hydrodynamic information includes the valve well water level information and the pressure information after the valve;

[0062] Constructing a hydrodynamic model according to the hydrodynamic information; wherein the hydrodynamic model is used to characterize the hydrodynamic load of the valve under different working conditions;

[0063] Through the hydrodynamic model, several optimization alternatives of hydrodynamic load coefficients are randomly generated;

[0064] Based on the preset hydrodynamic load coefficient model, each hydrodynamic load coefficient optimization alternative is simulated to obtain the evaluation result corresponding to each hydrodynamic load coefficient optimization alternative;

[0065] According to the evaluation results corresponding to each hydrodynamic load coefficient optimization alternative scheme, the optimal scheme is selected to determine the hydrodynamic load coefficient.

[0066] The present invention provides a method for optimizing the hydrodynamic load coefficient of a water delivery valve. First, the hydrodynamic information under different valve openings is obtained, including valve well water level information and valve rear pressure information. Based on the hydrodynamic information, a hydrodynamic model is constructed, which can intuitively present the change of water flow in the water delivery system, thereby improving the accuracy of subsequent determination of the hydrodynamic load coefficient. Through the hydrodynamic model, multiple alternative schemes for optimizing the hydrodynamic load coefficient are randomly generated, and these schemes are simulated. Through the simulation, the designer can intuitively find the optimal hydrodynamic load coefficient optimization scheme, thereby ensuring that the valve can still work safely and stably under high load conditions, reducing the risk of valve failure. In addition, each optimization scheme is substituted into a preset hydrodynamic load coefficient model for evaluation, and the advantages and disadvantages of each scheme can be clearly compared, and the optimal scheme is finally determined, and the hydrodynamic load coefficient is determined by the scheme. The method enables the designer to optimize the design of the valve in a targeted manner according to the environmental conditions of the water delivery system where the valve is located, significantly improve the service life of the valve, and reduce the risk of valve damage caused by overload or instability.

[0067] Example 2

[0068] like Figure 1 The embodiment 2 shown is a detailed description of a method for optimizing the hydrodynamic load coefficient of a water delivery valve in the embodiment 1, specifically:

[0069] By collecting the valve well water level information and the pressure information after the valve, the water dynamic information under different valve opening conditions is constructed;

[0070] A hydrodynamic model is constructed based on the above hydrodynamic information, and a number of alternative optimization schemes for hydrodynamic load coefficients are generated based on the hydrodynamic model, wherein the alternative optimization schemes for hydrodynamic load coefficients include alternative optimization schemes for hydrodynamic load coefficients under water filling conditions and alternative optimization schemes for hydrodynamic load coefficients under water discharge conditions;

[0071] Obtaining alternative optimization schemes for the hydrodynamic load coefficient (alternative optimization schemes for the hydrodynamic load coefficient under water filling conditions and alternative optimization schemes for the hydrodynamic load coefficient under water discharge conditions), and simulating various alternative optimization schemes for the hydrodynamic load coefficient based on a preset hydrodynamic load coefficient model;

[0072] This step mainly includes: simulating the changes in hydrodynamic force at different valve openings, as well as the water flow rate, pressure changes and valve force at different valve openings. By simulating, the hydrodynamic load coefficients determined by the optimization alternatives of each hydrodynamic load coefficient are compared to select the best alternative.

[0073] In one or more embodiments, the method further comprises:

[0074] Obtaining energy loss information in the water delivery system, wherein the energy loss information includes flow rate loss information and acceleration loss information;

[0075] Construct a mathematical model of valve well water head based on energy loss information;

[0076] Furthermore, velocity loss information refers to the decrease in velocity caused by friction between the water flow and the pipe wall and local pressure in the water supply system; and acceleration loss information refers to the energy consumed when the water flow is accelerated in the water supply system; the above method is used to improve the dynamic simulation accuracy of the entire water supply system, ensuring that the changes in the valve well water head can be accurately predicted under actual working conditions.

[0077] Furthermore, the mathematical model of valve well water head is as follows:

[0078]

[0079] Where: H ω is the valve well water level; 1 is the resistance coefficient of water flow before the valve; V is the average flow velocity of the corridor section at the valve; L′ is the inertia conversion length of the corridor before the valve; g is the acceleration of gravity; H 1 It is the water level in the corridor section before the valve.

[0080] In one or more embodiments, the method further comprises:

[0081] Construct a mathematical model of the pressure after the valve;

[0082] Based on the mathematical model of the pressure behind the valve, the mathematical model of the water head acting on the valve is obtained;

[0083] According to the mathematical model of the water head acting on the valve, the hydrodynamic load coefficient model is obtained;

[0084] Furthermore, the mathematical model of the pressure after the valve is:

[0085]

[0086] The mathematical model of the water head acting on the valve is:

[0087]

[0088] Where: ΔH is the water head that the valve bears; H ω is the valve well water level; is the pressure after the valve;

[0089] The hydrodynamic load coefficient model is:

[0090]

[0091] Where: ΔH is the water head that the valve bears; H 0 It is the initial working head of the valve.

[0092] In one or more embodiments, the valve opening n is in a range of 0.1 to 1.0.

[0093] Example 3

[0094] This embodiment 3 is a process of optimizing the hydrodynamic load coefficient under water-filled conditions:

[0095] When the valve opening n is 0.2, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 10 seconds, an upward trend in the interval from 10 seconds to 30 seconds, and a flattening trend in the interval from 30 seconds to 100 seconds. It can be seen that when the valve opening n is 0.2, the maximum pressure in the corridor section before the valve is 45.5m, and the minimum pressure in the corridor section before the valve is 44m;

[0096] When the valve opening n When the value is 0.3, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 20 seconds, an upward trend in the interval from 20 seconds to 38 seconds, and a flat trend in the interval from 38 seconds to 100 seconds. It can be seen that when the valve opening is n When the pressure is 0.3, the maximum pressure in the gallery section before the valve is 45.5m, and the minimum pressure in the gallery section before the valve is 43.8m;

[0097] When the valve opening n When the value is 0.4, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 25 seconds, an upward trend in the interval from 25 seconds to 48 seconds, and a flat trend in the interval from 55 seconds to 100 seconds. It can be seen that when the valve opening is n When the pressure is 0.4, the maximum pressure in the corridor section before the valve is 45.5m, and the minimum pressure in the corridor section before the valve is 43.5m

[0098] When the valve opening n is 0.5, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 35 seconds, and an upward trend in the interval from 35 seconds to 55 seconds. The pressure in the corridor section before the valve shows a downward trend in the interval from 48 seconds to 60 seconds, and tends to be flat in the interval from 60 seconds to 100 seconds. It can be seen that when the valve opening n is 0.5, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 35 seconds, and an upward trend in the interval from 35 seconds to 55 seconds. n When the pressure is 0.5, the maximum pressure in the gallery section before the valve is 45.5m, and the minimum pressure in the gallery section before the valve is 42.8m;

[0099] When the valve opening n is 0.6, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 40 seconds, an upward trend in the interval from 40 seconds to 60 seconds, and a flattening trend in the interval from 60 seconds to 100 seconds. It can be seen that when the valve opening n is 0.6, the maximum value of the pressure in the corridor section before the valve is 45.3m, and the minimum value of the pressure in the corridor section before the valve is 42m;

[0100] When the valve opening n When the value is 0.7, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 40 seconds, an upward trend in the interval from 40 seconds to 60 seconds, and a flat trend in the interval from 60 seconds to 100 seconds. It can be seen that when the valve opening is n When the pressure is 0.7, the maximum pressure in the gallery section before the valve is 45.3m, and the minimum pressure in the gallery section before the valve is 42m;

[0101] When the valve opening n is 0.8, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 50 seconds, an upward trend in the interval from 50 seconds to 75 seconds, and a flattening trend in the interval from 75 seconds to 100 seconds. It can be seen that when the valve opening n is 0.8, the maximum pressure in the corridor section before the valve is 44.8m, and the minimum pressure in the corridor section before the valve is 40.4m;

[0102] When the valve opening n When the pressure is taken as 0.2, the pressure in the corridor behind the valve increases from 0 seconds to 10 seconds, decreases from 10 seconds to 30 seconds, increases from 30 seconds to 36 seconds, and tends to be flat from 36 seconds to 100 seconds. It can be seen that the valve opening n When the pressure is 0.2, the maximum pressure in the corridor behind the valve is 35.8m, and the minimum pressure in the corridor behind the valve is 29.6m;

[0103] When the valve opening n When the pressure is 0.3, the pressure in the corridor behind the valve increases from 0 to 10 seconds, decreases from 10 to 38 seconds, increases from 38 to 44 seconds, and tends to be flat from 44 to 100 seconds. It can be seen that the valve opening n When the pressure is 0.3, the maximum pressure in the corridor behind the valve is 35.8m, and the minimum pressure in the corridor behind the valve is 28.3m;

[0104] When the valve opening n is 0.4, the pressure in the corridor behind the valve increases from 0 seconds to 10 seconds, decreases from 10 seconds to 48 seconds, increases from 48 seconds to 52 seconds, and tends to be flat from 52 seconds to 100 seconds. It can be seen that the valve opening n is 0.4, the pressure in the corridor behind the valve increases from 0 seconds to 10 seconds, and the pressure in the corridor behind the valve decreases from 10 seconds to 48 seconds. n When the pressure is 0.4, the maximum pressure in the corridor behind the valve is 35.7m, and the minimum pressure in the corridor behind the valve is 27.9m;

[0105] When the valve opening n is 0.5, the pressure in the corridor behind the valve increases from 0 seconds to 10 seconds, decreases from 10 seconds to 55 seconds, increases from 55 seconds to 62 seconds, and tends to be flat from 62 seconds to 100 seconds. It can be seen that the valve opening n is 0.5. n When the pressure is 0.5, the maximum pressure in the corridor behind the valve is 35.8m, and the minimum pressure in the corridor behind the valve is 27.8m;

[0106] When the valve opening n is 0.6, the pressure in the corridor behind the valve increases from 0 seconds to 8 seconds, tends to be flat from 8 seconds to 30 seconds, and decreases from 30 seconds to 62 seconds. The pressure in the corridor behind the valve increases from 62 seconds to 68 seconds, and tends to be flat from 68 seconds to 100 seconds. It can be seen that the valve opening n is 0.6. n When the pressure is 0.6, the maximum pressure in the corridor behind the valve is 36m, and the minimum pressure in the corridor behind the valve is 27.8m;

[0107] When the valve opening n When the pressure is taken as 0.7, the pressure in the corridor section behind the valve increases from 0 seconds to 8 seconds, tends to be flat from 8 seconds to 30 seconds, and decreases from 30 seconds to 62 seconds. The pressure in the corridor section behind the valve increases from 62 seconds to 68 seconds, and tends to be flat from 68 seconds to 100 seconds. It can be seen that the valve opening n When the pressure is 0.7, the maximum pressure in the corridor behind the valve is 36m, and the minimum pressure in the corridor behind the valve is 27.8m;

[0108] When the valve opening n When the pressure is 0.8, the pressure in the corridor behind the valve increases from 0 seconds to 7 seconds, tends to be stable from 7 seconds to 42 seconds, and decreases from 42 seconds to 76 seconds. The pressure in the corridor behind the valve increases from 76 seconds to 81 seconds, and tends to be stable from 81 seconds to 100 seconds. It can be seen that the valve opening nWhen the pressure is 0.8, the maximum pressure in the corridor behind the valve is 36.4m, and the minimum pressure in the corridor behind the valve is 28.2m;

[0109] Through the above analysis, we know that the inertia length of the corridor section before the valve is short. During the process of dynamic water closing, the positive water hammer effect of the corridor section before the valve is small; the inertia length of the corridor section after the valve is long. During the process of dynamic water closing, the negative water hammer effect of the corridor section after the valve is strong. It is inferred that when the valve opening n is 0.5, the pressure in the corridor section after the valve drops. Figures 2 to 3 shown.

[0110] This section is for the opening of each valve under water filling conditions n Analysis of hydrodynamic load factors:

[0111] When the valve opening n When the value is 0.2, the hydrodynamic load coefficient shows a downward trend in the interval from 0 seconds to 10 seconds, an upward trend in the interval from 10 seconds to 30 seconds, a downward trend in the interval from 30 seconds to 34 seconds, and a flat trend in the interval from 34 seconds to 100 seconds. It can be seen that when the valve opening is n When the value is 0.2, the maximum value of the hydrodynamic load coefficient is 1.5K f , the minimum value is 0.9K f ;

[0112] When the valve opening n is 0.3, the hydrodynamic load coefficient shows a downward trend in the interval from 0 seconds to 10 seconds, an upward trend in the interval from 10 seconds to 38 seconds, a downward trend in the interval from 38 seconds to 44 seconds, and a flat trend in the interval from 44 seconds to 100 seconds. It can be seen that when the valve opening n is 0.3, the maximum value of the hydrodynamic load coefficient is 1.6K f , the minimum value is 0.9K f ;

[0113] When the valve opening n is 0.4, the hydrodynamic load coefficient decreases in the interval from 0 seconds to 10 seconds, increases in the interval from 10 seconds to 46 seconds, decreases in the interval from 46 seconds to 53 seconds, and tends to be flat in the interval from 53 seconds to 100 seconds. It can be seen that when the valve opening is n When the value is 0.4, the maximum value of the hydrodynamic load coefficient is 1.62K f , the minimum value is 0.9K f ;

[0114] When the valve opening n When the value is 0.5, the hydrodynamic load coefficient shows a downward trend in the interval from 0 seconds to 10 seconds, an upward trend in the interval from 10 seconds to 56 seconds, a downward trend in the interval from 56 seconds to 61 seconds, and a flat trend in the interval from 61 seconds to 100 seconds. It can be seen that when the valve opening n When the value is 0.5, the maximum value of the hydrodynamic load coefficient is 1.7K f, the minimum value is 0.9K f ;

[0115] When the valve opening n When the value is 0.6, the hydrodynamic load coefficient decreases in the interval from 0 seconds to 33 seconds, increases in the interval from 33 seconds to 62 seconds, decreases in the interval from 62 seconds to 66 seconds, and tends to be flat in the interval from 66 seconds to 100 seconds. It can be seen that when the valve opening is n When the value is 0.6, the maximum value of the hydrodynamic load coefficient is 1.61K f , the minimum value is 0.6K f ;

[0116] When the valve opening n is 0.8, the hydrodynamic load coefficient shows a downward trend in the interval from 0 seconds to 43 seconds, an upward trend in the interval from 43 seconds to 76 seconds, a downward trend in the interval from 76 seconds to 82 seconds, and a flat trend in the interval from 82 seconds to 100 seconds. It can be seen that when the valve opening n is 0.8, the maximum value of the hydrodynamic load coefficient is 1.58K f , the minimum value is 0.38K f ;

[0117] Through the above analysis, it is known that under water filling conditions, the influence of valve opening on the hydrodynamic load coefficient is n It shows an upward trend in the range of 0.2 to 0.5, and a downward trend in the range of 0.5 to 0.8. The influence of valve opening on the hydrodynamic load coefficient is the highest when the valve opening n is 0.5. n When the value is 0.5, immediately start water and close the valve. n When the opening is greater than 0.5, the dynamic water closes the door and the hydrodynamic load coefficient is determined to be 1.7K f ,like Figures 4 to 5 shown.

[0118] Example 4

[0119] This embodiment 4 is a process of optimizing the hydrodynamic load coefficient under the condition of water discharge:

[0120] When the valve opening n is 0.2, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 15 seconds, an upward trend in the interval from 15 seconds to 33 seconds, a downward trend in the interval from 33 seconds to 42 seconds, and a flat trend in the interval from 42 seconds to 100 seconds. It can be known that the valve opening n When the pressure is 0.2, the maximum pressure in the corridor section before the valve is 54.8m, and the minimum pressure is 48.4m;

[0121] When the valve opening nWhen the value is 0.3, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 20 seconds, an upward trend in the interval from 20 seconds to 40 seconds, a downward trend in the interval from 40 seconds to 48 seconds, and a flattening trend in the interval from 48 seconds to 100 seconds. It can be known that the valve opening n When the pressure is 0.3, the maximum pressure in the corridor section before the valve is 55.2m, and the minimum pressure is 47.9m;

[0122] When the valve opening n When the value is 0.4, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 22 seconds, an upward trend in the interval from 22 seconds to 48 seconds, a downward trend in the interval from 48 seconds to 58 seconds, and a flattening trend in the interval from 58 seconds to 100 seconds. It can be known that the valve opening n When the pressure is 0.4, the maximum pressure in the corridor section before the valve is 56m, and the minimum pressure is 47.9m;

[0123] When the valve opening n is 0.5, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 30 seconds, an upward trend in the interval from 30 seconds to 55 seconds, a downward trend in the interval from 55 seconds to 62 seconds, and a flattening trend in the interval from 62 seconds to 100 seconds. It can be seen that when the valve opening n is 0.5, the maximum pressure in the corridor section before the valve is 56.2m and the minimum pressure is 47m;

[0124] When the valve opening n When the value is 0.6, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 35 seconds, an upward trend in the interval from 35 seconds to 64 seconds, a downward trend in the interval from 64 seconds to 72 seconds, and a flattening trend in the interval from 72 seconds to 100 seconds. It can be known that the valve opening n When the pressure is 0.6, the maximum pressure in the corridor section before the valve is 56m, and the minimum pressure is 46m;

[0125] When the valve opening n is 0.7, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 40 seconds, an upward trend in the interval from 40 seconds to 70 seconds, a downward trend in the interval from 70 seconds to 78 seconds, and a flattening trend in the interval from 78 seconds to 100 seconds. It can be seen that when the valve opening n is 0.7, the maximum pressure in the corridor section before the valve is 55.7m and the minimum pressure is 45.8m;

[0126] When the valve opening n When the value is 0.8, the pressure in the corridor section before the valve shows a downward trend in the interval from 0 seconds to 50 seconds, an upward trend in the interval from 50 seconds to 78 seconds, a downward trend in the interval from 78 seconds to 88 seconds, and a flattening trend in the interval from 88 seconds to 100 seconds. It can be known that the valve opening n When the pressure is 0.8, the maximum pressure in the corridor before the valve is 55.1m, and the minimum pressure is 44m;

[0127] When the valve opening n When the value is 0.2, the pressure in the corridor section behind the valve decreases in the interval from 0 seconds to 13 seconds, increases in the interval from 13 seconds to 18 seconds, decreases in the interval from 18 seconds to 23 seconds, increases in the interval from 23 seconds to 28 seconds, and tends to be flat in the interval from 28 seconds to 100 seconds. It can be known that the valve opening n When the pressure is 0.2, the maximum pressure in the corridor section behind the valve is 40.3, and the minimum pressure is 39.1;

[0128] When the valve opening n When the value is 0.3, the pressure in the corridor section behind the valve decreases in the interval from 0 to 12 seconds, increases in the interval from 12 to 25 seconds, and tends to be flat in the interval from 25 to 100 seconds. It can be seen that when the valve opening n is 0.3, the maximum pressure in the corridor section behind the valve is 41, and the minimum pressure is 39;

[0129] When the valve opening n is 0.4, the pressure in the corridor section behind the valve shows a downward trend in the interval from 0 seconds to 14 seconds, an upward trend in the interval from 14 seconds to 26 seconds, and a flattening trend in the interval from 26 seconds to 100 seconds. It can be seen that when the valve opening n is 0.4, the maximum pressure in the corridor section behind the valve is 40.9 and the minimum pressure is 39.5;

[0130] When the valve opening n is 0.5, the pressure in the corridor section behind the valve shows a downward trend in the interval from 0 seconds to 20 seconds, an upward trend in the interval from 20 seconds to 26 seconds, and a flattening trend in the interval from 26 seconds to 100 seconds. It can be seen that when the valve opening n is 0.5, the maximum pressure in the corridor section behind the valve is 41.1, and the minimum pressure is 38.8;

[0131] When the valve opening n is 0.6, the pressure in the corridor section behind the valve shows a downward trend in the interval from 0 seconds to 24 seconds, an upward trend in the interval from 24 seconds to 27 seconds, and a flattening trend in the interval from 27 seconds to 100 seconds. It can be seen that when the valve opening n is 0.6, the maximum pressure in the corridor section behind the valve is 41.6 and the minimum pressure is 39.5;

[0132] When the valve opening n is 0.7, the pressure in the corridor section behind the valve shows a downward trend in the interval from 0 seconds to 13 seconds, an upward trend in the interval from 13 seconds to 26 seconds, a downward trend in the interval from 26 seconds to 56 seconds, an upward trend in the interval from 56 seconds to 72 seconds, and a flat trend in the interval from 72 seconds to 100 seconds. It can be seen that when the valve opening n is 0.7, the pressure in the corridor section behind the valve shows a downward trend in the interval from 0 seconds to 13 seconds, an upward trend in the interval from 13 seconds to 26 seconds, a downward trend in the interval from 26 seconds to 56 seconds, an upward trend in the interval from 56 seconds to 72 seconds, and a flat trend in the interval from 72 seconds to 100 seconds. n When the pressure is 0.7, the maximum pressure in the corridor section behind the valve is 41.8, and the minimum pressure is 38.8;

[0133] Through the above analysis, it is known that under the water discharge condition, the inertia length of the gallery section before the valve is longer and the inertia length of the gallery section after the valve is shorter. During the dynamic water closing process, the positive water hammer effect of the gallery section before the valve is large. When the valve opening is n and the dynamic water closing valve is closed, the pressure of the gallery section before the valve increases by more than 8m, and the negative water hammer effect of the gallery section after the valve is small. Figure 6 to Figure 7 shown.

[0134] The opening of each valve under the water discharge condition n Analysis of hydrodynamic load factors:

[0135] When the valve opening n When the value is 0.1, the hydrodynamic load coefficient decreases in the range of 0 to 10 seconds, increases in the range of 10 to 26 seconds, decreases in the range of 26 to 29 seconds, and tends to be flat in the range of 29 to 100 seconds. It can be seen that when the valve opening is n When the value is 0.1, the maximum value of the hydrodynamic load coefficient is 1.3K f , the minimum value is 0.82K f ;

[0136] When the valve opening n When the value is 0.2, the hydrodynamic load coefficient decreases in the range of 0 seconds to 15 seconds, increases in the range of 15 seconds to 34 seconds, decreases in the range of 34 seconds to 43 seconds, and tends to be flat in the range of 43 seconds to 100 seconds. It can be seen that when the valve opening is n When the value is 0.2, the maximum value of the hydrodynamic load coefficient is 1.36K f , the minimum value is 0.76K f ;

[0137] When the valve opening n is 0.3, the hydrodynamic load coefficient shows a downward trend in the range of 0 seconds to 18 seconds, an upward trend in the range of 18 seconds to 40 seconds, a downward trend in the range of 40 seconds to 49 seconds, and a flat trend in the range of 49 seconds to 100 seconds. It can be seen that when the valve opening n is 0.3, the maximum value of the hydrodynamic load coefficient is 1.51K f , the minimum value is 0.77K f ;

[0138] When the valve opening n is 0.4, the hydrodynamic load coefficient shows a downward trend in the range of 0 seconds to 25 seconds, an upward trend in the range of 25 seconds to 48 seconds, a downward trend in the range of 48 seconds to 54 seconds, and a gentle trend in the range of 54 seconds to 100 seconds. It can be seen that when the valve opening n is 0.4, the maximum value of the hydrodynamic load coefficient is 1.52K f , the minimum value is 0.7K f ;

[0139] When the valve opening nWhen the value is 0.5, the hydrodynamic load coefficient decreases in the range of 0 to 30 seconds, increases in the range of 30 to 55 seconds, decreases in the range of 55 to 70 seconds, and becomes flat in the range of 70 to 100 seconds. It can be seen that when the valve opening is n When the value is 0.5, the maximum value of the hydrodynamic load coefficient is 1.60K f , the minimum value is 0.6K f ;

[0140] When the valve opening n When the value is 0.6, the hydrodynamic load coefficient decreases in the range of 0 seconds to 33 seconds, increases in the range of 33 seconds to 64 seconds, decreases in the range of 64 seconds to 74 seconds, and tends to be flat in the range of 74 seconds to 100 seconds. It can be seen that when the valve opening is n When the value is 0.6, the maximum value of the hydrodynamic load coefficient is 1.56K f , the minimum value is 0.58K f ;

[0141] When the valve opening n When the value is 0.7, the hydrodynamic load coefficient decreases in the range of 0 seconds to 42 seconds, increases in the range of 42 seconds to 70 seconds, and tends to be flat in the range of 70 seconds to 100 seconds. It can be seen that when the valve opening n is 0.7, the maximum value of the hydrodynamic load coefficient is 1.54K f , the minimum value is 0.43K f ;

[0142] When the valve opening n When the value is 0.8, the hydrodynamic load coefficient decreases in the range of 0 to 48 seconds, increases in the range of 48 to 78 seconds, decreases in the range of 78 to 90 seconds, and tends to be flat in the range of 90 to 100 seconds. It can be seen that when the valve opening is n When the value is 0.8, the maximum value of the hydrodynamic load coefficient is 1.2K f , the minimum value is 0.32K f ;

[0143] When the valve opening n is 0.9, the hydrodynamic load coefficient shows a downward trend in the range of 0 seconds to 56 seconds, a downward trend in the range of 56 seconds to 86 seconds, a downward trend in the range of 86 seconds to 95 seconds, and a flat trend in the range of 95 seconds to 100 seconds. It can be seen that when the valve opening n is 0.9, the maximum value of the hydrodynamic load coefficient is 1.3K f , the minimum value is 0.18K f ;

[0144] Through the above analysis, it is known that under the condition of water discharge, the influence of valve opening on the hydrodynamic load coefficient is nIt shows an upward trend in the range of 0.1 to 0.5, and a downward trend in the range of 0.5 to 0.9. The influence of valve opening on the hydrodynamic load coefficient is the highest when the valve opening n is 0.5. n When the value is 0.5, immediately start water and close the valve. n When the opening is greater than 0.5, the dynamic water closes the door and the hydrodynamic load coefficient is determined to be 1.6K f .

[0145] Through Example 3 and Example 4, it can be known that the water delivery system determines that the hydrodynamic load coefficient is 1.7K under the water filling condition. f , the hydrodynamic load factor under discharge conditions is 1.6K f ,like Figures 8 to 9 shown.

[0146] Example 5

[0147] like Fig.10 As shown, an electronic device includes at least one processor and a memory connected to the at least one processor in communication; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method for optimizing the hydrodynamic load coefficient of a water transfer valve described in the above embodiment. The input and output interface may include a display, a keyboard, a mouse, and a USB interface for inputting and outputting data; the power supply is used to provide power to the electronic device;

[0148] Those skilled in the art can understand that: all or part of the steps of implementing the above-mentioned method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM), disks or optical disks, etc. Various media that can store program codes.

[0149] When the above-mentioned integrated unit of the present invention is implemented in the form of a software functional unit and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention can be essentially or partly reflected in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks, or optical disks.

[0150] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for optimizing the hydrodynamic load coefficient of a water delivery valve, characterized in that the method include: Obtaining the hydrodynamic information in the water delivery system under different valve openings; wherein the hydrodynamic information includes the valve well water level information and the pressure information after the valve; Constructing a hydrodynamic model according to the hydrodynamic information; wherein the hydrodynamic model is used to characterize the hydrodynamic load of the valve under different working conditions; Through the hydrodynamic model, several optimization alternatives of hydrodynamic load coefficients are randomly generated; Based on the preset hydrodynamic load coefficient model, each hydrodynamic load coefficient optimization alternative is simulated to obtain the evaluation result corresponding to each hydrodynamic load coefficient optimization alternative; According to the evaluation results corresponding to each hydrodynamic load coefficient optimization alternative scheme, the optimal scheme is selected to determine the hydrodynamic load coefficient.

2. The method for optimizing the hydrodynamic load coefficient of a water delivery valve according to claim 1, characterized in that: The method also includes: Obtaining energy loss information in the water delivery system, wherein the energy loss information includes flow rate loss information and acceleration loss information; A mathematical model of valve well water head is constructed based on energy loss information.

3. The method for optimizing the hydrodynamic load coefficient of a water delivery valve according to claim 2, characterized in that: The mathematical model of the valve well water head is: Where: H ω is the water level in the valve well; ξ1 is the water flow resistance coefficient before the valve; V is the average flow velocity of the corridor section at the valve; L′ is the inertia conversion length of the corridor before the valve; g is the acceleration of gravity; H1 is the water level of the corridor section before the valve.

4. The method for optimizing the hydrodynamic load coefficient of a water delivery valve according to claim 1, characterized in that: The method also includes: Construct a mathematical model of the pressure after the valve; Based on the mathematical model of the pressure behind the valve, the mathematical model of the water head acting on the valve is obtained; According to the mathematical model of the water head acting on the valve, the hydrodynamic load coefficient model is obtained.

5. The method for optimizing the hydrodynamic load coefficient of a water delivery valve according to claim 4, characterized in that: The mathematical model of the pressure after the valve is: Where: is the pressure head after the valve; H′ T is the initial hydrostatic pressure head at the top of the valve gallery; is the head loss related to the reaction speed; ξ2 is the local resistance loss coefficient; ξ v ' n is the correction coefficient of the local velocity in the flow; α is the additional correction factor; It is the additional head loss caused by the change of fluid momentum.

6. The method for optimizing the hydrodynamic load coefficient of a water delivery valve according to claim 4, characterized in that: The mathematical model of the water head acting on the valve is: Where: ΔH is the water head that the valve bears; H ω is the valve well water level; It is the pressure head after the valve.

7. The method for optimizing the hydrodynamic load coefficient of a water delivery valve according to claim 4, characterized in that: The hydrodynamic load coefficient model is: In the formula: ΔH is the water head that the valve is subjected to; H0 is the initial water head that the valve is subjected to.

8. The method for optimizing the hydrodynamic load coefficient of a water delivery valve according to claim 1, characterized in that: The method comprises optimizing a hydrodynamic load coefficient model under a water-filled working condition by setting a valve opening n value between 0.1 and 1.0, and determining a hydrodynamic load coefficient suitable for the water-filled working condition.

9. The method for optimizing the hydrodynamic load coefficient of a water delivery valve according to claim 1, characterized in that: The method comprises optimizing the hydrodynamic load coefficient model under the water discharge condition by setting the valve opening n to a value between 0.1 and 1.0, and determining the hydrodynamic load coefficient suitable for the water discharge condition.

10. An electronic device, characterized in that: It includes at least one processor and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method described in any one of claims 1 to 9.

Images