Operation debugging method and device for pump set system

Abstract

The invention relates to an operation debugging method and device of a pump set system, and belongs to the field of pressure supply medium equipment. Calculating the pipeline impedance coefficient of the pipeline between the nodes under the rated flow; respectively determining a valve impedance coefficient and an equipment impedance coefficient; establishing a pump set performance equation according to the pump set performance curve; establishing a flow distribution mathematical model according to the principle that flow conservation and parallel branch pressure drop are the same; calculating the flow distribution coefficient of each pipeline according to the pipeline impedance coefficient, the valve impedance coefficient and the equipment impedance coefficient, and establishing a system main pipeline characteristic equation; the main pipeline characteristic equation and the pump set performance equation are combined, and a pump set operation condition point is calculated; calculating the pressure of each node according to the operating condition point of the pump set and the flow coefficient of each pipeline; and the valve opening is calculated according to the pressure and flow requirements of all the nodes, and debugging is conducted by controlling the valve opening. The method can effectively reduce the calculation duration and the calculation amount.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure supply medium equipment, and in particular relates to an operation debugging method and device for a pump group system. Background Art

[0002] A pump system is a mechanical system that is composed of one or more pumps (such as centrifugal pumps, axial flow pumps, etc.) and supporting pipelines, valves, control devices and other auxiliary equipment (such as pressure gauges, flow meters, etc.) for transporting liquids or gases. The operation and debugging method of a pump system refers to a series of technical means and steps for optimizing and adjusting the operating status of the system before the pump system is put into actual operation or during daily operation.

[0003] Debugging the pump system can ensure that the pump system can work in the best condition, including achieving the designed performance indicators such as flow rate and pressure, while ensuring the safety and economy of the system. Debugging can not only verify the correctness of the design and installation, but also discover potential problems and optimize the system operating parameters, thus laying the foundation for subsequent long-term operation. It can not only ensure the performance, safety and stability of the system, but also greatly improve the economic benefits and provide guarantees for long-term reliable operation.

[0004] However, the existing intelligent algorithms for pipeline hydraulic calculation are based on theoretical calculations. At the beginning of system construction, there is no actual operating data and the calculation cannot be corrected, resulting in certain errors. In addition, intelligent algorithms are used to calculate the pump system pipelines and pump output operating points. As the number of system branches and bypasses increases, the calculation variables also increase, and the calculation time increases significantly. During system debugging, a single device or multiple devices in a certain operating mode are usually adjusted multiple times at the same time. It is necessary to quickly obtain a reference data group through calculation to guide practical operations during debugging. As the number of variables increases, the intelligent algorithm takes a long time, which is not conducive to the timeliness requirements during system debugging. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the invention is to provide a method and device for operation and debugging of a pump system, which can improve the accuracy of pipeline hydraulic calculations, effectively reduce the calculation time and amount, thereby meeting the timeliness requirements during system debugging, improving economic benefits, and providing guarantees for long-term reliable operation.

[0006] In a first aspect of the present invention, a method for operating and debugging a pump system is provided, the method comprising:

[0007] S1, obtaining the pipeline information, valve information and equipment information of the pump system;

[0008] S2, based on pipeline information, calculate the pipeline impedance coefficient of the pipeline between each node at the rated flow rate;

[0009] S3, determining the valve impedance coefficient and the device impedance coefficient respectively according to the valve information and the device information;

[0010] S4, establishing the pump group performance equation according to the pump group performance curve;

[0011] S5, based on the principle of flow conservation and the same pressure drop of parallel branches, a flow distribution mathematical model is established;

[0012] S6, based on the opening of each regulating valve and the commissioning of equipment in the target loop, according to the pipeline impedance coefficient, valve impedance coefficient and equipment impedance coefficient, solve the flow coefficient of each pipeline and establish the system total pipeline characteristic equation;

[0013] S7, combine the total pipeline characteristic equation and the pump group performance equation to calculate the pump group operating condition point;

[0014] S8, calculating the pressure of each node according to the operating point of the pump group and the flow coefficient of each pipeline;

[0015] S9, calculates the valve opening according to the pressure and flow requirements of each node, and debugs by controlling the valve opening.

[0016] Furthermore, the pipeline impedance coefficient is specifically:

[0017]

[0018] Among them, S i represents the impedance coefficient of the i-th pipeline, DH i represents the head loss of the i-th pipeline, Q i,e Represents the rated flow rate of the i-th pipeline.

[0019] Furthermore, the pump performance equation is specifically:

[0020] H 泵组 =f(N,n,Q)

[0021] Among them, H 泵组 It represents the pump head in the pump performance equation, N represents the total number of pumps in the pump system, n represents the operating speed of the pump, and Q represents the total operating flow of the pump.

[0022] Furthermore, the mathematical model is specifically:

[0023] A(Q0,Q1,…,Q N ) T =B

[0024] Among them, A represents the mathematical model, Q0 represents the total flow coefficient of the pump group outlet, Q1,…,Q Nrepresents the flow coefficient of each pipeline, T represents the transposition, and B represents the constraint condition of the total flow in the pipeline.

[0025] Furthermore, the overall pipeline characteristic equation of the system is specifically:

[0026] S 系统 =S0+S 生产 +(S 用户1 +S1+S v1 )Q1 2

[0027] H 系统 =S 系统 Q 2

[0028] Among them, S 系统 represents the total impedance coefficient of the system, S0 represents the impedance coefficient of the main pipeline, S 生产 Represents the impedance coefficient of the production device, S 用户1 Indicates the equipment impedance coefficient of user 1, S v1 Indicates the impedance coefficient of user 1's regulating valve, H 系统 represents the total pipeline characteristic equation, Q1 represents the flow coefficient of branch 1, and Q represents the total flow of the pump group.

[0029] Furthermore, the calculation formula of the pump group operating point is as follows:

[0030]

[0031] Among them, H 系统 represents the overall pipeline characteristic equation, S 系统 Represents the total impedance coefficient of the system, H 泵组 Represents the performance equation of the pump group.

[0032] In a second aspect of the present invention, an operation debugging device is provided, which is used to implement the operation debugging method of the pump system according to any one of the first aspects, and the device comprises:

[0033] An acquisition module is used to acquire pipeline information, valve information and equipment information of the pump system;

[0034] The first calculation module is used to calculate the pipeline impedance coefficient of the pipeline between each node at the rated flow rate according to the pipeline information;

[0035] A determination module, used to determine the valve impedance coefficient and the device impedance coefficient respectively according to the valve information and the device information;

[0036] The first establishing module is used to establish a pump group performance equation according to the pump group performance curve;

[0037] The second building module is used to build a flow distribution mathematical model based on the principle of flow conservation and the same pressure drop of parallel branches;

[0038] A solution module, for solving the flow coefficient of each pipeline based on the opening of each regulating valve and the commissioning status of the equipment in the target loop, according to the pipeline impedance coefficient, the valve impedance coefficient and the equipment impedance coefficient, and establishing the system total pipeline characteristic equation;

[0039] The combined module calculates the operating point of the pump group by combining the total pipeline characteristic equation and the pump group performance equation;

[0040] The second calculation module is used to calculate the pressure of each node according to the operating point of the pump group and the flow coefficient of each pipeline;

[0041] The control module is used to calculate the valve opening according to the pressure and flow requirements of each node, and to debug by controlling the valve opening.

[0042] Furthermore, the pipeline impedance coefficient is specifically:

[0043]

[0044] Among them, S i represents the impedance coefficient of the i-th pipeline, DH i represents the head loss of the i-th pipeline, Q i,e Represents the rated flow rate of the i-th pipeline.

[0045] Furthermore, the pump performance equation is specifically:

[0046] H 泵组 =f(N,n,Q)

[0047] Among them, H 泵组 It represents the pump head in the pump performance equation, N represents the total number of pumps in the pump system, n represents the operating speed of the pump, and Q represents the total operating flow of the pump.

[0048] Furthermore, the mathematical model is specifically:

[0049] A(Q0,Q1,…,Q N ) T =B

[0050] Among them, A represents the mathematical model, Q0 represents the total flow coefficient of the pump group outlet, Q1,…,Q N represents the flow coefficient of each pipeline, T represents the transposition, and B represents the constraint condition of the total flow in the pipeline.

[0051] Furthermore, the overall pipeline characteristic equation of the system is specifically:

[0052]

[0053] H 系统 =S 系统 Q 2

[0054] Among them, S 系统 represents the total impedance coefficient of the system, S0 represents the impedance coefficient of the main pipeline, S 生产 Represents the impedance coefficient of the production device, S 用户1 Indicates the equipment impedance coefficient of user 1, S v1 Indicates the impedance coefficient of user 1's regulating valve, H 系统 represents the total pipeline characteristic equation, Q1 represents the flow coefficient of branch 1, and Q represents the total flow of the pump group.

[0055] Furthermore, the combined module is used to calculate the operating point of the pump group:

[0056]

[0057] Among them, H 系统 represents the overall pipeline characteristic equation, S 系统 Represents the total impedance coefficient of the system, H 泵组 Represents the performance equation of the pump group.

[0058] The beneficial effects of the present invention are as follows:

[0059] In an embodiment of the present invention, the pipeline information, valve information and equipment information of the pump system are first obtained, and then the pipeline impedance coefficient, valve impedance coefficient and equipment impedance coefficient are calculated respectively. Then, according to the pump performance curve, a pump performance equation is established. Further, based on the opening of each regulating valve in the target loop and the equipment commissioning status, the flow coefficient of each pipeline is solved according to the pipeline impedance coefficient, valve impedance coefficient and equipment impedance coefficient, and the system total pipeline characteristic equation is established. By combining the total pipeline characteristic equation and the pump performance equation, the pump operating point is calculated. Based on the pump operating point and the flow coefficient of each pipeline, the pressure of each node is calculated. Finally, according to the pressure and flow demand of each node, the valve opening is calculated, and debugging is performed by controlling the valve opening. This method meets the timeliness requirements during system debugging, improves the accuracy of pipeline hydraulic calculations, effectively reduces calculation time and amount, improves economic benefits, and provides guarantee for long-term reliable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The accompanying drawings are only used to illustrate specific embodiments and are not considered to limit the present invention. In the entire drawings, the same reference symbols represent the same components. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0061] Figure 1 It is a flow chart of an operation and debugging method of a pump system provided by an embodiment of the present invention;

[0062] Figure 2 It is a structural schematic diagram of an operation and debugging device of a pump group system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0063] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work should fall within the scope of protection of the present invention.

[0064] Furthermore, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts disclosed in the present invention.

[0065] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of methods and systems consistent with some aspects of the present invention as detailed in the appended claims.

[0067] The present invention proposes a method and device for operating and debugging a pump system, in order to solve the problem that the existing intelligent algorithm calculates the pump system pipelines and pump output operating points, the calculation variables and the calculation time increase significantly, which is not conducive to the timeliness requirements in the system debugging process, and the calculation errors are large.

[0068] Method Embodiment

[0069] Reference Figure 1 , showing a flow chart of an operation and debugging method of a pump group system provided in an embodiment of the present invention.

[0070] An embodiment of the present invention provides an operation debugging method for a pump system, the method comprising:

[0071] Specifically, the method includes steps S1 to S9.

[0072] S1, obtain the pipeline information, valve information and equipment information of the pump system.

[0073] Among them, the pump group system is an overall system including pumps, pipelines, valves and other equipment for conveying fluids. The pipeline information refers to the parameters of each pipeline in the system, such as length, diameter, material, layout, etc. The valve information refers to the type, position, and characteristics (such as resistance coefficient, switch status) of the valves in the system. The equipment information refers to the equipment parameters related to the pump group, such as the pump head, flow rate, motor power, etc.

[0074] It should be noted that by obtaining the pipeline, valve and equipment information of the pump system and establishing the basic data for debugging, this step ensures the accuracy of subsequent calculations and avoids debugging failures due to missing or incorrect data. At the same time, comprehensive information collection helps to fully understand the system operating environment and provide a basis for optimizing parameter adjustments.

[0075] S2, based on the pipeline information, calculate the pipeline impedance coefficient of the pipeline between each node at the rated flow rate.

[0076] Among them, the rated flow rate is the target flow rate of the pipeline during system design or operation, and is the key parameter for calculating the impedance coefficient. The pipeline impedance coefficient is a characteristic parameter that reflects the resistance of the pipeline to the fluid during the fluid transportation process, and is related to the pipeline length, diameter, roughness and fluid characteristics.

[0077] It should be noted that by calculating the impedance coefficient of the pipeline at the rated flow rate, the resistance of the pipeline to the fluid flow is quantified, which provides key input for the subsequent establishment of an accurate flow and pressure balance model.

[0078] In a possible implementation manner, the pipeline impedance coefficient is specifically:

[0079]

[0080] Among them, S i represents the impedance coefficient of the i-th pipeline, DH i represents the head loss of the i-th pipeline, Q i,e Represents the rated flow rate of the i-th pipeline.

[0081] S3, determining the valve impedance coefficient and the device impedance coefficient respectively according to the valve information and the device information.

[0082] Among them, the valve impedance coefficient is the resistance coefficient generated by the valve to the fluid flow, which depends on the valve type, opening and fluid characteristics. The equipment impedance coefficient refers to the resistance characteristic parameters of the equipment in the system (such as heat exchangers, filters) to the fluid flow, reflecting the impact of the equipment on the flow rate.

[0083] It should be noted that by calculating the impedance coefficients of valves and equipment separately, an important supplement is provided to the overall resistance characteristics of the system. This step ensures a comprehensive understanding of the resistance of each component of the system, which not only improves the accuracy of flow distribution calculations, but also optimizes the valve opening adjustment and the operating status of the equipment.

[0084] S4. Establish the pump group performance equation based on the pump group performance curve.

[0085] Among them, the pump group performance curve is a characteristic curve that describes the changes in the pump's head, power and efficiency at different flow rates. It is the core indicator of pump performance. The pump group performance equation represents the pump group performance curve through a mathematical formula, which is used to calculate the relationship between the pump's head and flow rate under specific operating conditions.

[0086] It should be noted that by establishing the performance equation of the pump group, the operating characteristics of the pump such as head and power demand under different flow conditions can be accurately quantified. This process converts the complex performance curve into a mathematical model, which is convenient for joint solution with the pipeline characteristics.

[0087] In a possible implementation manner, the pump group performance equation is specifically:

[0088] H 泵组 =f(N,n,Q)

[0089] Among them, H 泵组 It represents the pump head in the pump performance equation, N represents the total number of pumps in the pump system, n represents the operating speed of the pump, and Q represents the total operating flow of the pump.

[0090] S5. Based on the principle of flow conservation and the same pressure drop of parallel branches, a flow distribution mathematical model is established.

[0091] Among them, flow conservation refers to the principle that in the pump system, the sum of the inflow flow at any node is equal to the sum of the outflow flow, ensuring mass balance. The principle of equal pressure drop in parallel branches means that in the parallel pipelines of the pump group, the pressure drop of each branch must be equal to meet the fluid mechanics equilibrium conditions. The mathematical model describes the relationship between flow and pressure in the system through a formula to solve the flow distribution of each pipeline. The flow coefficient represents the flow ratio of the fluid in each pipeline and is used to describe the flow distribution.

[0092] It should be noted that the mathematical model of flow distribution is established through the principles of flow conservation and pressure drop balance, which provides a scientific basis for flow distribution in complex pump systems. This method comprehensively considers the fluid dynamics of multi-branch pipelines and accurately solves the flow coefficient of each pipeline. Its advantage is that it ensures the balance of flow and pressure in the operation of the entire system, avoids unreasonable flow distribution or local pressure is too low, thereby improving the operating stability and efficiency of the system, and at the same time lays a calculation foundation for subsequent debugging.

[0093] In a possible implementation, the mathematical model is specifically:

[0094] A(Q0,Q1,…,Q N ) T =B

[0095] Among them, A represents the mathematical model, Q0 represents the total flow coefficient of the pump group outlet, Q1,…,Q N represents the flow coefficient of each pipeline, T represents the transposition, and B represents the constraint condition of the total flow in the pipeline.

[0096] S6, based on the opening of each regulating valve and the equipment commissioning status in the target loop, according to the pipeline impedance coefficient, the valve impedance coefficient and the equipment impedance coefficient, solve the flow coefficient of each pipeline and establish the system total pipeline characteristic equation.

[0097] Among them, the target loop is a specific loop in the system that needs to be adjusted or optimized first, which is usually related to key equipment or major users. Adjusting the valve opening means controlling the flow and pressure by changing the degree of opening and closing of the valve to optimize the system operation. The system's total pipeline characteristic equation represents the equation representing the relationship between the impedance characteristics and flow of the entire pipeline system, which is used to calculate fluid dynamics balance.

[0098] It should be noted that by establishing the system's total pipeline characteristic equation based on the valve opening and equipment commissioning of the target loop, the impedance characteristics of the system can be quantified from a global perspective. The advantage of this step is that it can comprehensively integrate the influence of each subsystem and key components to achieve an accurate description of the overall system resistance.

[0099] In a possible implementation manner, the system total pipeline characteristic equation is specifically:

[0100]

[0101] H 系统 =S 系统 Q 2

[0102] Among them, S 系统 represents the total impedance coefficient of the system, S0 represents the impedance coefficient of the main pipeline, S 生产 Represents the impedance coefficient of the production device, S 用户1 Indicates the equipment impedance coefficient of user 1, S v1 Indicates the impedance coefficient of user 1's regulating valve, H 系统 represents the total pipeline characteristic equation, Q1 represents the flow coefficient of branch 1, and Q represents the total flow of the pump group.

[0103] S7, combine the total pipeline characteristic equation and the pump group performance equation to calculate the operating point of the pump group.

[0104] Among them, the pump group operating condition point refers to the specific flow and head point reached by the pump group in actual operation, which is the goal of system design and operation. The pump group operating condition point is calculated by combining the total pipeline characteristic equation and the pump group performance equation. The main advantage of this step is to ensure that the pump group operates at the optimal efficiency point or other preset conditions. The simultaneous equations not only help the system achieve the predetermined flow and head, but also optimize energy consumption and improve system operation efficiency.

[0105] In a possible implementation manner, the calculation formula for the operating point of the pump group is specifically:

[0106]

[0107] Among them, H 系统 represents the overall pipeline characteristic equation, S 系统 Represents the total system impedance coefficient, H 泵组 Represents the performance equation of the pump group.

[0108] S8, calculate the pressure of each node according to the operating point of the pump group and the flow coefficient of each pipeline.

[0109] Among them, the node pressure is the pressure value of each key point in the system, which determines the dynamic state of the fluid and the balance of the system.

[0110] It should be noted that the pressure of each node in the system is calculated based on the operating point of the pump group and the flow coefficient of each pipeline, and the pressure distribution in the system is accurately predicted and analyzed to ensure that the pressure of the key nodes meets the flow demand, thereby achieving the flow and pressure balance of the system. In addition, the accurate calculation of node pressure can also help discover potential problems in pipeline design or operation, such as local pressure that is too low or too high.

[0111] S9, calculates the valve opening according to the pressure and flow requirements of each node, and debugs by controlling the valve opening.

[0112] Among them, flow demand refers to the flow required by each part of the system, which is usually determined by factors such as production demand and equipment operation. Valve opening refers to the degree of opening and closing of the valve, which directly controls the flow and pressure. System optimization and regulation are achieved by adjusting the valve opening.

[0113] It should be noted that by calculating the node pressure and flow requirements and adjusting the valve opening, the system can be accurately debugged. The advantage of this process is that it can dynamically adjust the flow and pressure of each part of the system to ensure that the operating status of each node meets the design requirements and avoid unreasonable flow distribution or pressure abnormalities. By flexibly adjusting the valve opening, the overall operating efficiency of the pump system can be effectively optimized, the energy efficiency and stability of the system can be improved, and excessive or insufficient loads can be avoided to ensure long-term reliable operation of the equipment.

[0114] Specifically, the pump system includes at least one pump. The pump-valve system prepares the medium required by each flow demand device through a production device. The pump system is provided with necessary regulating valves for flow regulation. The pump system uses pipelines to connect various devices, valves and pumps, and forms a loop for the medium to return from the pump outlet to the pump inlet. The pipeline impedance coefficient of the pipeline between each node at its rated flow is calculated according to the pipeline information as the fixed pipeline impedance coefficient. The valve and equipment impedance coefficient model is established according to the valve information and the equipment information. The flow-head mathematical model of the pump at different speeds and different numbers is established according to the pump performance curve. The flow distribution mathematical model is established according to the principle of conservation of flow at each node and the same pressure drop of parallel branches. The flow coefficient of each pipeline is solved according to the opening of each regulating valve and the commissioning of the equipment, and the total pipeline characteristic equation is established. The operating condition point of the pump is obtained according to the total pipeline characteristic equation and the pump model. The pipeline impedance coefficient is corrected according to the operating data during the actual operation of the pump system.

[0115] The beneficial effects of the present invention are as follows:

[0116] In an embodiment of the present invention, the pipeline information, valve information and equipment information of the pump system are first obtained, and then the pipeline impedance coefficient, valve impedance coefficient and equipment impedance coefficient are calculated respectively. Then, according to the pump performance curve, a pump performance equation is established. Further, based on the opening of each regulating valve in the target loop and the equipment commissioning status, the flow coefficient of each pipeline is solved according to the pipeline impedance coefficient, valve impedance coefficient and equipment impedance coefficient, and the system total pipeline characteristic equation is established. By combining the total pipeline characteristic equation and the pump performance equation, the pump operating point is calculated. Based on the pump operating point and the flow coefficient of each pipeline, the pressure of each node is calculated. Finally, according to the pressure and flow demand of each node, the valve opening is calculated, and debugging is performed by controlling the valve opening. This method meets the timeliness requirements during system debugging, improves the accuracy of pipeline hydraulic calculations, effectively reduces calculation time and amount, improves economic benefits, and provides guarantee for long-term reliable operation.

[0117] Device Embodiment

[0118] Reference Manual Attached Figure 2 , showing a schematic structural diagram of an operation and debugging device for a pump group system provided in an embodiment of the present invention.

[0119] Another specific embodiment of the present invention discloses an operation and debugging device for a pump system, which is used to implement the operation and debugging method for a pump system in any one of the method embodiments. The operation and debugging device 20 for a pump system includes:

[0120] The acquisition module 201 is used to acquire the pipeline information, valve information and equipment information of the pump system.

[0121] The first calculation module 202 is used to calculate the pipeline impedance coefficient of the pipeline between each node at the rated flow rate according to the pipeline information.

[0122] The determination module 203 is used to determine the valve impedance coefficient and the device impedance coefficient respectively according to the valve information and the device information.

[0123] The first establishing module 204 is used to establish a pump group performance equation according to the pump group performance curve.

[0124] The solution module 205 is used to establish a flow distribution mathematical model based on the flow conservation principle and the same pressure drop of parallel branches.

[0125] The second establishing module 206 is used to solve each pipeline flow coefficient based on the opening of each regulating valve and the equipment commissioning status in the target loop according to the pipeline impedance coefficient, the valve impedance coefficient and the equipment impedance coefficient, and establish the system total pipeline characteristic equation.

[0126] The combined module 207 calculates the operating point of the pump group by combining the total pipeline characteristic equation and the pump group performance equation.

[0127] The second calculation module 208 is used to calculate the pressure of each node according to the operating point of the pump group and the flow coefficient of each pipeline.

[0128] The control module 209 is used to calculate the valve opening according to the pressure and flow requirements of each node, and to perform debugging by controlling the valve opening.

[0129] In a possible implementation manner, the pipeline impedance coefficient is specifically:

[0130]

[0131] Among them, S i represents the impedance coefficient of the i-th pipeline, DH i represents the head loss of the i-th pipeline, Q i,e Represents the rated flow rate of the i-th pipeline.

[0132] In a possible implementation manner, the pump group performance equation is specifically:

[0133] H 泵组 =f(N,n,Q)

[0134] Among them, H 泵组 It represents the pump head in the pump performance equation, N represents the total number of pumps in the pump system, n represents the operating speed of the pump, and Q represents the total operating flow of the pump.

[0135] In a possible implementation, the mathematical model is specifically:

[0136] A(Q0,Q1,…,Q N ) T =B

[0137] Among them, A represents the mathematical model, Q0 represents the total flow coefficient of the pump group outlet, Q1,…,Q N represents the flow coefficient of each pipeline, T represents the transposition, and B represents the constraint condition of the total flow in the pipeline.

[0138] In a possible implementation manner, the system total pipeline characteristic equation is specifically:

[0139]

[0140] H 系统 =S 系统 Q 2

[0141] Among them, S 系统represents the total impedance coefficient of the system, S0 represents the impedance coefficient of the main pipeline, S 生产 Represents the impedance coefficient of the production device, S 用户1 Indicates the equipment impedance coefficient of user 1, S v1 Indicates the impedance coefficient of user 1's regulating valve, H 系统 represents the total pipeline characteristic equation, Q1 represents the flow coefficient of branch 1, and Q represents the total flow of the pump group.

[0142] In a possible implementation, the combined modules are used to calculate the operating point of the pump group:

[0143]

[0144] Among them, H 系统 represents the overall pipeline characteristic equation, S 系统 Represents the total impedance coefficient of the system, H 泵组 Represents the performance equation of the pump group.

[0145] The device provided in the embodiment of the present invention can implement each process and step in the above method embodiment, and can obtain the same or similar technical effects. To avoid repetition, the present invention will not go into details.

[0146] The beneficial effects of the present invention are as follows:

[0147] In an embodiment of the present invention, the pipeline information, valve information and equipment information of the pump system are first obtained, and then the pipeline impedance coefficient, valve impedance coefficient and equipment impedance coefficient are calculated respectively. Then, according to the pump performance curve, a pump performance equation is established. Further, based on the opening of each regulating valve in the target loop and the equipment commissioning status, the flow coefficient of each pipeline is solved according to the pipeline impedance coefficient, valve impedance coefficient and equipment impedance coefficient, and the system total pipeline characteristic equation is established. By combining the total pipeline characteristic equation and the pump performance equation, the pump operating point is calculated. Based on the pump operating point and the flow coefficient of each pipeline, the pressure of each node is calculated. Finally, according to the pressure and flow demand of each node, the valve opening is calculated, and debugging is performed by controlling the valve opening. This method meets the timeliness requirements during system debugging, improves the accuracy of pipeline hydraulic calculations, effectively reduces calculation time and amount, improves economic benefits, and provides guarantee for long-term reliable operation.

[0148] Computer Readable Storage Medium Embodiments

[0149] The present invention provides a computer-readable storage medium on which a computer program is stored. The computer program can be loaded and executed by a processor to implement the operation debugging method of a pump group system according to the first aspect.

[0150] The applicant of the present invention has made a detailed explanation and description of the implementation examples of the present invention in conjunction with the drawings in the specification. However, those skilled in the art should understand that the above implementation examples are only preferred implementation schemes of the present invention, and the detailed description is only to help readers better understand the spirit of the present invention, but not to limit the scope of protection of the present invention. On the contrary, any improvements or modifications based on the inventive spirit of the present invention should fall within the scope of protection of the present invention.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Any changes or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for operating and debugging a pump system, characterized in that: The operation and debugging method of the pump group system comprises: S1, obtaining the pipeline information, valve information and equipment information of the pump system; S2, calculating the pipeline impedance coefficient of the pipeline between each node at the rated flow rate according to the pipeline information; S3, determining a valve impedance coefficient and a device impedance coefficient respectively according to the valve information and the device information; S4, establishing the pump group performance equation according to the pump group performance curve; S5, based on the principle of flow conservation and the same pressure drop of parallel branches, a flow distribution mathematical model is established; S6, based on the opening of each regulating valve and the equipment commissioning status in the target loop, according to the pipeline impedance coefficient, the valve impedance coefficient and the equipment impedance coefficient, solve the flow coefficient of each pipeline and establish the system total pipeline characteristic equation; S7, combining the total pipeline characteristic equation and the pump group performance equation to calculate the pump group operating condition point; S8, calculating the pressure of each node according to the operating point of the pump group and the flow coefficient of each pipeline; S9, calculates the valve opening according to the pressure and flow requirements of each node, and debugs by controlling the valve opening.

2. The operation and debugging method of the pump system according to claim 1, characterized in that: The pipeline impedance coefficient is specifically: Among them, S i represents the impedance coefficient of the i-th pipeline, DH i represents the head loss of the i-th pipeline, Q i,e Represents the rated flow rate of the i-th pipeline.

3. The operation and debugging method of the pump system according to claim 1, characterized in that: The pump group performance equation is specifically: H 泵组 =f(N,n,Q) Among them, H 泵组 It represents the pump head in the pump performance equation, N represents the total number of pumps in the pump system, n represents the operating speed of the pump, and Q represents the total operating flow of the pump.

4. The operation and debugging method of the pump system according to claim 1, characterized in that: The mathematical model is specifically: A(Q0,Q1,…,Q N ) T =B Among them, A represents the mathematical model, Q0 represents the total flow coefficient of the pump group outlet, Q1,…,Q N represents the flow coefficient of each pipeline, T represents transposition, and B represents the constraint on the total flow in the pipeline.

5. The operation and debugging method of the pump system according to claim 1, characterized in that: The system total pipeline characteristic equation is specifically: H 系统 =S 系统 Q 2 Among them, S 系统 represents the total impedance coefficient of the system, S0 represents the impedance coefficient of the main pipeline, S 生产 Represents the impedance coefficient of the production device, S 用户1 Indicates the equipment impedance coefficient of user 1, S v1 Indicates the impedance coefficient of user 1's regulating valve, H 系统 represents the total pipeline characteristic equation, Q1 represents the flow coefficient of branch 1, and Q represents the total flow of the pump group.

6. The operation and debugging method of the pump system according to claim 1, characterized in that: The specific calculation formula of the pump group operating condition point is: Among them, H 系统 represents the overall pipeline characteristic equation, S 系统 Represents the total impedance coefficient of the system, H 泵组 Represents the performance equation of the pump group.

7. An operation and debugging device for a pump system, characterized in that: The operation and debugging device of the pump group system comprises: An acquisition module is used to acquire pipeline information, valve information and equipment information of the pump system; A first calculation module, used to calculate the pipeline impedance coefficient of the pipeline between each node at a rated flow rate according to the pipeline information; A determination module, used to determine a valve impedance coefficient and a device impedance coefficient respectively according to the valve information and the device information; The first establishing module is used to establish a pump group performance equation according to the pump group performance curve; The second building module is used to build a flow distribution mathematical model based on the principle of flow conservation and the same pressure drop of parallel branches; A solution module, for solving the flow coefficient of each pipeline based on the opening of each regulating valve and the commissioning status of the equipment in the target loop, according to the pipeline impedance coefficient, the valve impedance coefficient and the equipment impedance coefficient, and establishing the system total pipeline characteristic equation; A combined module, which calculates the operating point of the pump group by combining the total pipeline characteristic equation and the pump group performance equation; A second calculation module is used to calculate the pressure of each node according to the operating point of the pump group and the flow coefficient of each pipeline; The control module is used to calculate the valve opening according to the pressure and flow requirements of each node, and to debug by controlling the valve opening.

8. The operation and debugging device of the pump system according to claim 7, characterized in that: The pipeline impedance coefficient is specifically: Among them, S i represents the impedance coefficient of the i-th pipeline, DH i represents the head loss of the i-th pipeline, Q i,e Represents the rated flow rate of the i-th pipeline.

9. The operation and debugging device of the pump system according to claim 7, characterized in that: The pump group performance equation is specifically: H 泵组 =f(N,n,Q) Among them, H 泵组 It represents the pump head in the pump performance equation, N represents the total number of pumps in the pump system, n represents the operating speed of the pump, and Q represents the total operating flow of the pump.

10. The operation and debugging device of the pump system according to claim 7, characterized in that: The mathematical model is specifically: A(Q0,Q 1, …,Q N ) T =B Among them, A represents the mathematical model, Q0 represents the total flow coefficient of the pump group outlet, Q 1, …,Q N represents the flow coefficient of each pipeline, T represents transposition, and B represents the constraint on the total flow in the pipeline.

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