Method and system for evaluating selection and matching of hydraulic system of fully mechanized coal mining face

Abstract

The application provides a hydraulic system selection matching evaluation method and system for a fully mechanized coal mining face, and particularly relates to the automatic technology field of the fully mechanized coal mining face. The method first acquires user input information, which covers support body system parameters and pipeline system parameters, and is respectively applied to the corresponding system. According to the input information, a selection matching evaluation strategy is matched. If the corresponding support body system is based on the support body system parameters, the support body moving speed is calculated by using a support body moving speed calculation model, and the selection matching is judged by comparing with the user preset support body moving speed demand value. If the corresponding pipeline system is based on the pipeline system parameters, the total pipeline resistance loss is calculated by using a pipeline resistance loss calculation model, and the selection matching is judged according to whether the preset expected range is exceeded. The method solves the problem that the system matching cannot be quantitatively evaluated when the hydraulic system selection design of the fully mechanized coal mining face is performed, and realizes the change from experience dependence to model driving.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fully mechanized working face automation, in particular to a selection and matching evaluation method and system for a hydraulic system of a fully mechanized working face. BACKGROUND

[0002] With the rapid development of domestic high-end hydraulic supports and the increasing reliability requirements of the hydraulic supports under complex coal mining conditions, dynamic characteristic testing and optimal selection of the hydraulic system of the fully mechanized working face have become the key to improving the reliability of the hydraulic supports and ensuring safety in production. The industry is evolving towards automation and intelligentization, and urgent support is needed for systematic design theory. However, in the selection and design process of the hydraulic supports, pump stations and pipeline systems, enterprises still generally rely on traditional experience-based analogy methods. This over-reliance on experience lacks a unified theoretical calculation model and quantitative analysis means, making it difficult to systematically reveal the working characteristics and essential laws of the hydraulic support system, resulting in the hydraulic system being difficult to achieve optimal performance configuration, causing not only resource waste but also failing to meet the strategic needs of sustainable development and high-end equipment manufacturing.

[0003] To solve the above problems, the traditional technical solution mainly adopts the path of "experience design - test verification - repeated correction". That is, the designer first selects the type according to historical project data, then tests the system performance through a large number of field or simulation tests, such as whether the support speed meets the standard, whether the pipeline resistance is too large, etc., and makes multiple adjustments on this basis. Although this method can achieve system function to some extent, it is essentially a "trial and error" method, which has obvious shortcomings: first, it cannot quantitatively evaluate the overall matching of the system (such as the dynamic coupling relationship between the support, the pump station and the pipeline) in the design stage, which may cause performance bottlenecks due to insufficient coordination between components; second, the repeated testing process is time-consuming and labor-intensive, greatly prolonging the design cycle and increasing the development cost, and the correction results often depend on the experience of individual experts, lacking objective and unified evaluation standards, making it difficult to ensure the accuracy and reliability of the design.

[0004] In summary, how to solve the technical problem of the inability to quantitatively evaluate the system matching caused by the lack of unified modeling and collaborative analysis of the support, the pump station and the pipeline system in the selection and design of the hydraulic system of the fully mechanized working face is a problem that needs to be solved. SUMMARY

[0005] The main purpose of the present application is to provide a selection and matching evaluation method and system of a hydraulic system of a fully mechanized coal mining face, so as to at least solve the technical problem that the system matching cannot be quantitatively evaluated due to the lack of unified modeling and collaborative analysis of the support body system, the pump station and the pipeline system in the selection and design of the hydraulic system of the fully mechanized coal mining face, and realize the transformation from experience dependence to model driving, and solve the core problem that the system matching cannot be quantitatively evaluated.

[0006] In order to achieve the above-mentioned purpose, the present application provides a selection and matching evaluation method and system of a hydraulic system of a fully mechanized coal mining face.

[0007] In the first aspect, the present application provides a selection and matching evaluation method of a hydraulic system of a fully mechanized coal mining face, which comprises:

[0008] Obtaining input information of a user, the input information comprising support body system parameters and pipeline system parameters, wherein the support body system parameters are applied to the support body system, and the pipeline system parameters are applied to the pipeline system;

[0009] Matching a corresponding selection and matching evaluation strategy according to the input information;

[0010] If the selection and matching evaluation strategy corresponds to the support body system, calculating the support body moving speed through a support body moving speed calculation model based on the support body system parameters, and judging whether the support body system selection is matched according to whether the support body moving speed meets the user's preset support body moving speed demand value;

[0011] If the selection and matching evaluation strategy corresponds to the pipeline system, calculating the total pipeline resistance loss through a pipeline resistance loss calculation model based on the pipeline system parameters, and judging whether the pipeline system selection is matched according to whether the total pipeline resistance loss exceeds the preset expected range.

[0012] Specifically, the support body system parameters at least comprise support body system type, column number, support type, column cylinder diameter, column rod diameter, column stroke, column lowering stroke, push rod diameter, push cylinder diameter, push stroke, support center distance and support weight; the support body moving speed is calculated through a support body moving speed calculation model based on the support body system parameters, which comprises:

[0013] The column cylinder diameter and the column rod diameter are used to calculate the column lowering liquid back pressure;

[0014] The column lowering liquid back pressure and the preset column lowering liquid resistance coefficient are used to calculate the column lowering liquid flow;

[0015] The column number, the column cylinder diameter, the column lowering liquid flow and the column stroke are used to calculate the column lowering time;

[0016] acquiring a pump station flow Q in pump station system parameters 泵 , calculating a column lifting time according to the column number, the column cylinder diameter and the pump station flow;

[0017] calculating an area ratio of a lower chamber and an upper chamber of a pusher jack according to the pusher cylinder diameter and the pusher rod diameter, calculating a pusher jack pushing time according to the obtained area ratio, a load of a support, the pusher stroke, a pusher jack liquid inlet pressure, a pusher jack liquid inlet flow, and a preset pusher jack liquid return pressure;

[0018] calculating a support frame moving speed according to the support center distance, the column lowering time, the column lifting time and the pusher jack pushing time.

[0019] Specifically:

[0020] The column lowering liquid return back pressure calculation formula is: 回 = (D1 2 -D2 2 ) / D1 2 ×P 额 ;

[0021] The column lowering liquid return flow calculation formula is: 回 = (P 回 / k) 0.5 ;

[0022] Wherein, D1 is the column cylinder diameter, D2 is the column rod diameter, k is the column lowering liquid return resistance coefficient, and P 额 is the pump station rated pressure.

[0023] Specifically:

[0024] The column lowering time calculation formula is: j = nL1 / (Q 回 ×10 6 / 60(3.14×D1 2 / 4));

[0025] The column lifting time calculation formula is: s = nL1 / (3.14×D1 2 / 4) / (Q 泵 ×10 6 / 60);

[0026] The pusher jack pushing time calculation formula is: y = F×L2 / (P T进 Q T进 -P T回 Q T进 / κ);

[0027] The formula for calculating the moving speed of the support frame is: V 常 =60 × center distance of the support / (T) j +T s +T y );

[0028] In the formula, n is the number of columns, L1 is the column lowering stroke, F is the load on the support; κ is the area ratio of the lower cavity and the upper cavity of the jack, and κ = D3 2 / (D3 2 -D4 2 D3 is the pusher cylinder diameter, D4 is the pusher rod diameter; L2 is the pusher stroke; P T进 To shift the hydraulic pressure of the jack, P T进 =P 额 ;P T回 To reduce the return pressure of the jack, P T回 =k 回 Q T回 2 Q T回 To increase the return flow rate of the jack, k 回 To shift the return fluid resistance coefficient, Q T回 = Q T进 / κ;Q T进 To increase the inlet flow rate of the jack, Q T进 = Q 泵 Q 泵 This refers to the flow rate of the pumping station.

[0029] Specifically:

[0030] When the frame system is a conventional system, the actuators in the intermediate liquid supply circuit from the column to the oil tank are the column hydraulic control check valve, the main valve, the return liquid shut-off valve, and the liquid outlet pipeline.

[0031] When the type of the frame system is a high-flow liquid supply system, the actuators in the intermediate liquid supply circuit from the column to the oil tank are the column hydraulic control check valve, the main valve, the high-flow liquid supply valve, the return liquid shut-off valve, and the liquid outlet pipeline.

[0032] When the frame system is a rapid return system, the actuators in the intermediate liquid supply circuit from the column to the oil tank are the column hydraulic control check valve, the rapid return valve, the return circuit breaker valve, and the outlet pipeline.

[0033] Specifically, the pipeline system parameters at least include a liquid supply mode, a working face length, an inlet pipeline specification, an outlet pipeline specification, a local resistance element, an inlet pipeline length and an outlet pipeline length; the pipeline total resistance loss is calculated through a pipeline resistance loss calculation model based on the pipeline system parameters, including: obtaining an emulsion pump station type, determining a liquid supply fluid density and a kinematic viscosity according to the emulsion pump station type, and obtaining a local resistance coefficient of the local resistance element; obtaining a pump station flow in the pump station system parameters, calling a corresponding resistance loss calculation formula according to the liquid supply mode, and calculating the along-path and local resistance losses of the inlet pipeline based on the pump station flow, the inlet pipeline length, the inlet pipeline specification, the liquid supply fluid density and the kinematic viscosity respectively; calculating the along-path and local resistance losses of the outlet pipeline based on the outlet flow, the outlet pipeline length, the outlet pipeline specification, the liquid supply fluid density and the kinematic viscosity respectively; obtaining the pipeline total resistance loss according to the along-path and local resistance losses of the inlet pipeline and the along-path and local resistance losses of the outlet pipeline.

[0034] In a second aspect, the present application provides a selection and matching evaluation system of a hydraulic system of a fully-mechanized coal mining face, the evaluation system applying the evaluation method of the first aspect, and the evaluation system comprising:

[0035] a strategy selection module configured to obtain input information of a user and match a corresponding selection and matching evaluation strategy according to the input information of the user;

[0036] a support and carrier moving speed calculation module connected with the strategy selection module and configured to calculate a support and carrier moving speed according to the support and carrier system parameters;

[0037] a pipeline resistance loss calculation module connected with the strategy selection module and configured to calculate a pipeline total resistance loss according to the pipeline system parameters;

[0038] a matching module connected with the support and carrier moving speed calculation module and / or the pipeline resistance loss calculation module, the matching module being configured to judge whether the selection of the support and carrier system is matched and / or whether the selection of the pipeline system is matched according to the support and carrier moving speed and / or the pipeline total resistance loss.

[0039] In a third aspect, the present application provides a computer device comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete the communication among each other through the communication bus;

[0040] the memory is configured to store a computer program;

[0041] the processor is configured to execute the program stored on the memory, so as to realize the steps of the evaluation method of the first aspect.

[0042] In a fourth aspect, the present application provides a computer readable storage medium, having stored thereon a computer program, which, when executed by a processor, implements the steps of the evaluation method of the first aspect.

[0043] In a fifth aspect, the present application provides a computer program product comprising a computer program which, when executed by a processor, implements the steps of the evaluation method of the first aspect.

[0044] The application provides a selection and matching evaluation method and system for a hydraulic system of a fully mechanized coal mining face. The method obtains user input support frame system parameters and pipeline system parameters, which are applied to corresponding systems. According to the input information, a selection and matching evaluation strategy is matched. For the support frame system, the support frame moving speed is calculated based on the parameters by using a support frame moving speed calculation model, and the support frame moving speed is compared with a user preset support frame moving speed requirement value to determine the selection and matching of the support frame system. For the pipeline system, the total pipeline resistance loss is calculated based on the parameters by using a pipeline resistance loss calculation model, and whether the pipeline system selection and matching is determined according to whether it exceeds a preset expected range. The method solves the technical problem that the system matching cannot be quantitatively evaluated due to the lack of unified modeling and collaborative analysis in the selection and design of the hydraulic system of the fully mechanized coal mining face, realizes the change from experience dependence to model driving, and effectively quantitatively evaluates the system matching. BRIEF DESCRIPTION OF DRAWINGS

[0045] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the application, and together with the description of the application, serve to explain the application. The present application is shown in the drawings as follows:

[0046] Figure 1 The flowchart of the selection and matching evaluation method for the hydraulic system of the fully mechanized coal mining face provided by the present application is shown in the figure;

[0047] Figure 2 The connection schematic diagram of the selection and matching evaluation system for the hydraulic system of the fully mechanized coal mining face provided by the present application is shown in the figure;

[0048] Figure 3 The computer device structure schematic diagram of the selection and matching evaluation system for the hydraulic system of the fully mechanized coal mining face provided by the present application is shown in the figure;

[0049] Figure 4 The liquid supply circuit of the conventional system provided by the present application is shown in the figure;

[0050] Figure 5 The liquid supply circuit of the large-flow liquid supply system provided by the present application is shown in the figure;

[0051] Figure 6 The liquid supply circuit of the fast liquid return system provided by the present application is shown in the figure.

[0052] The specific embodiments of the application have been shown by way of example in the above figures, and will be described in more detail below. These figures and this written description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate the inventive concept to one of ordinary skill in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0053] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by one of ordinary skill in the art without creative work should fall within the scope of protection of the present application.

[0054] The terms "first", "second", "third", "fourth" and the like in the description and claims of the present application, and the above drawings, if any, are used to distinguish similar objects, and are not necessarily used to describe a particular sequential or chronological order. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than that illustrated or described herein.

[0055] In the present application, the words "exemplary" or "for example" are used to mean example, illustration, or instance, and do not necessarily have to imply that something is preferred or advantageous. In the present application, any embodiment or design solution described as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or design solutions. Rather, the illustrative words are used to present certain embodiments in a concrete manner.

[0056] The present application provides a selection and matching evaluation method and system for a hydraulic system of a fully mechanized coal mining face. The present application proposes the evaluation method to solve the problem that the system matching cannot be quantitatively evaluated due to the fact that the support body system, the pump station and the pipeline system are not modeled and analyzed cooperatively during the selection and design of the hydraulic system of the fully mechanized coal mining face. The user input information containing the system parameters of the support body and the pipeline system parameters is obtained, and the selection and matching evaluation strategy is matched accordingly. For the support body system, the support speed is calculated by using a support speed calculation model, and the matching is judged by comparing the demand value. For the pipeline system, the total resistance loss is calculated by using a pipeline resistance loss calculation model, and the matching is judged by whether it is out of the expected range, so as to realize the change from experience dependence to model driving.

[0057] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes can not be described again in some examples. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0058] Figure 1 The flowchart of the selection and matching evaluation method of the hydraulic system of the fully mechanized coal mining face provided by the present application is shown in Figure 1 The selection and matching evaluation method of the hydraulic system of the fully mechanized coal mining face provided by the present embodiment, the method comprises:

[0059] S101: Obtain the input information of the user, the input information comprising support and support system parameters and pipeline system parameters;

[0060] The support and support system parameters are applied to the support and support system, and the pipeline system parameters are applied to the pipeline system.

[0061] S102: According to the input information, match the corresponding selection and matching evaluation strategy, wherein the selection and matching evaluation strategy corresponds to the support and support system, or the selection and matching evaluation strategy corresponds to the pipeline system.

[0062] The implementation specifically comprises:

[0063] In the present embodiment, the input information of the user is received through the graphical user interface of the hydraulic system selection and matching evaluation software running on the computer device. The graphical user interface comprises a form area dedicated to entering support and support system parameters and a form area dedicated to entering pipeline system parameters.

[0064] The user enters the following specific parameter values in the support and support system parameter form area through keyboard input or drop-down menu selection:

[0065] Support model: input character type data, for example, “ZY12000 / 28 / 60D”.

[0066] Support system type: select one from the drop-down menu “regular system”, “large flow liquid supply system” or “fast liquid return system”, for example, select “regular system”.

[0067] Column number: input integer type data, for example, “4”.

[0068] Column cylinder diameter D1: input numerical value type data, unit: millimeter (mm), for example, “400”.

[0069] Column rod diameter D2: input numerical value type data, unit: millimeter (mm), for example, “280”.

[0070] Column stroke: input numerical data in millimeters (mm), for example, "1800".

[0071] Lowering stroke L1: input numerical data in millimeters (mm), for example, "600". This parameter is a part of the column stroke, and specifically refers to the stroke in the lowering action stage.

[0072] Pushing cylinder diameter D3: input numerical data in millimeters (mm), for example, "160".

[0073] Pushing rod diameter D4: input numerical data in millimeters (mm), for example, "85".

[0074] Pushing stroke L2: input numerical data in millimeters (mm), for example, "900".

[0075] Support center distance: input numerical data in meters (m), for example, "1.75".

[0076] Support weight: input numerical data in tons (t), for example, "35".

[0077] Load F of the support: input numerical data in kilonewtons (kN), for example, "12000".

[0078] The user enters the following specific parameter values in the pipeline system parameter form area through keyboard input or drop-down menu selection:

[0079] Liquid supply mode: select one from the drop-down menu, such as "single-in single-out", "circular liquid supply", or "four-in three-out circular liquid supply".

[0080] Working face length: input numerical data in meters (m), for example, "300".

[0081] Inlet pipeline specification: input character data representing the nominal diameter, for example, "DN50".

[0082] Outlet pipeline specification: input character data representing the nominal diameter, for example, "DN50".

[0083] Inlet pipeline length: input numerical data in meters (m), for example, "300". This length is determined based on the working face length.

[0084] Outlet pipeline length: input numerical data in meters (m), for example, "300". This length is determined based on the working face length.

[0085] Local resistance elements: specified by checking the options in the table, such as checking "90° elbow (quantity: 20)", "tee (quantity: 10)", "gate valve (quantity: 4)", etc. The software has a built-in standard resistance coefficient lookup table for common local resistance elements.

[0086] In addition, the user also needs to enter the pump station flow Qpump (unit: liters / minute, for example "800") and pump station rated pressure Ppump (unit: megapascal MPa, for example "31.5") in the software associated pump station system parameter configuration interface. 额

[0087] The software performs basic format checking on all user input parameters, such as checking if the value is within a reasonable range, if the required items have been filled in, etc.

[0088] In S102, the corresponding selection matching evaluation strategy is matched according to the input information, specifically, after the user completes the parameter input and clicks the "start evaluation" button on the interface, the software program starts to execute the strategy matching logic. The program first reads the complete input information data set obtained in S101 step.

[0089] The evaluation strategy matching logic preset in the program is a conditional judgment statement, and its pseudo code is as follows:

[0090] If (the input "support and bracket system parameter" set is not empty) and (the user explicitly selects the "perform support and bracket system evaluation" option): mark the "selection matching evaluation strategy" as "corresponding to the support and bracket system";

[0091] Otherwise if (the input "pipeline system parameter" set is not empty) and (the user explicitly selects the "perform pipeline system evaluation" option): mark the "selection matching evaluation strategy" as "corresponding to the pipeline system";

[0092] In actual software implementation, two independent checkboxes or buttons are provided on the graphical interface, labeled "execute support and bracket matching evaluation" and "execute pipeline system matching evaluation", the user can choose to start one or both. The program activates the corresponding strategy branch according to the user's selection. The matching logic does not involve complex artificial intelligence models, but is based on explicit user input and selection for conditional routing.

[0093] After the strategy matching is completed, the program transfers the flow control right to the corresponding evaluation branch. If the strategy is marked as "corresponding to the support and bracket system", the program jumps to the bracket moving speed calculation module in S103 step; if the strategy is marked as "corresponding to the pipeline system", the program jumps to the pipeline resistance loss calculation module in S104 step.

[0094] ​The S101 to S102 steps complete the accurate collection and verification of all necessary parameters through a standardized graphical interface, and realize the automatic matching of the evaluation strategy based on clear condition judgment logic, lay an accurate and reliable data foundation and clear process guidance for subsequent special quantitative calculation and matching evaluation of the support and support system or pipeline system, and ensure the standardization and repeatability of the entire evaluation process.

[0095] S103: If the selection and matching evaluation strategy corresponds to the support and support system, calculate the support and support system moving speed based on the support and support system parameters through a moving speed calculation model, and determine whether the support and support system selection matches according to whether the support and support system moving speed meets the user's preset moving speed requirement value.

[0096] The support and support system parameters at least include support system type, column number, support model, column cylinder diameter, column rod diameter, column stroke, column descent stroke, push rod diameter, push cylinder diameter, push stroke, support center distance and support weight.

[0097] Specifically, the support and support system moving speed is calculated based on the support and support system parameters through a moving speed calculation model, including: calculating the column descent back pressure according to the column cylinder diameter and the column rod diameter; calculating the column descent back flow according to the column descent back pressure and a preset column descent back flow resistance coefficient; calculating the column descent time according to the column number, the column cylinder diameter, the column descent back flow and the column stroke; obtaining the pump station flow in the pump station system parameters, and calculating the column ascent time according to the column number, the column cylinder diameter and the pump station flow; calculating the area ratio of the push jack lower cavity and the upper cavity according to the push cylinder diameter and the push rod diameter, and calculating the push jack push time according to the obtained area ratio, the support load, the push stroke, the push jack liquid inlet pressure, the push jack liquid inlet flow, the preset push jack back pressure; calculating the support and support system moving speed according to the support center distance, the column descent time, the column ascent time and the push jack push time.

[0098] Preferably, the column descent back pressure calculation formula is: P 回 =(D1 2 -D2 2 ) / D1 2 ×P 额 ;

[0099] The column descent back flow calculation formula is: Q 回 =(P 回 / k) 0.5 ; wherein D1 is the column cylinder diameter, D2 is the column rod diameter, k is the column descent back flow resistance coefficient, and P 额 is the pump station rated pressure.

[0100] Preferably, the column lowering time calculation formula: T j =nL1 / (Q 回 ×10 6 / 60(3.14×D1 2 / 4));

[0101] The column raising time calculation formula: T s =nL1 / (3.14×D1 2 / 4) / (Q 泵 ×10 6 / 60);

[0102] The pushing jack pushing time calculation formula: T y =F×L2 / (P T进 Q T进 -P T回 Q T进 / κ);

[0103] The support frame moving frame speed calculation formula is: V 常 =60×support center distance / (T j +T s +T y );

[0104] In the formula, n is the number of columns, L1 is the column stroke, F is the load of the support; κ is the area ratio of the lower chamber and the upper chamber of the pushing jack, and κ =D3 2 / (D3 2 -D4 2 ), D3 is the pushing cylinder diameter, D4 is the pushing rod diameter; L2 is the pushing stroke; P T进 is the pushing jack liquid inlet pressure, P T进 =P 额 ; P T回 is the pushing jack liquid return pressure, P T回 =k 回 Q T回 2 , Q T回 is the pushing jack liquid return flow, k 回 is the pushing liquid return resistance coefficient, Q T回 = Q T进 / κ; Q T进 is the pushing jack liquid inlet flow, Q T进 = Q 泵 , Q 泵 is the pump station flow.

[0105] Optionally, when the type of the self-mounted system is a conventional system, the respective executing elements in the column-to-oil tank intermediate liquid supply circuit are a column hydraulic control non-return valve, a main valve, a liquid return circuit breaker, and a liquid outlet pipeline; when the type of the self-mounted system is a large-flow liquid supply system, the respective executing elements in the column-to-oil tank intermediate liquid supply circuit are a column hydraulic control non-return valve, a main valve, a large-flow liquid supply valve, a liquid return circuit breaker, and a liquid outlet pipeline; when the type of the self-mounted system is a rapid liquid return system, the respective executing elements in the column-to-oil tank intermediate liquid supply circuit are a column hydraulic control non-return valve, a rapid liquid return valve, a liquid return circuit breaker, and a liquid outlet pipeline.

[0106] In S104, if the type selection matching evaluation strategy corresponds to a pipeline system, a total pipeline resistance loss is calculated based on the pipeline system parameters by using a pipeline resistance loss calculation model, and whether the pipeline system type selection is matched is determined according to whether the total pipeline resistance loss exceeds a preset expected range.

[0107] The pipeline system parameters at least include a liquid supply mode, a working face length, an inlet pipeline specification, an outlet pipeline specification, a local resistance element, an inlet pipeline length, and an outlet pipeline length.

[0108] Specifically, the pipeline system parameters further include the inlet pipeline length and the outlet pipeline length. The total pipeline resistance loss is calculated based on the pipeline system parameters by using the pipeline resistance loss calculation model, including: obtaining a type of an emulsion pump station, determining a fluid density and a kinematic viscosity of the liquid supply according to the type of the emulsion pump station, and obtaining a local resistance coefficient of the local resistance element; obtaining a pump station flow rate in the pump station system parameters, calling a corresponding resistance loss calculation formula according to the liquid supply mode, and calculating an along-path and local resistance loss of the inlet pipeline based on the pump station flow rate, the inlet pipeline length, the inlet pipeline specification, the fluid density, and the kinematic viscosity; calculating an along-path and local resistance loss of the outlet pipeline based on the outlet flow rate, the outlet pipeline length, the outlet pipeline specification, the fluid density, and the kinematic viscosity; and obtaining the total pipeline resistance loss according to the along-path and local resistance loss of the inlet pipeline and the along-path and local resistance loss of the outlet pipeline.

[0109] The following are embodiments of the type selection matching evaluation method of the hydraulic system of the fully-mechanized coal mining face provided in the present application, which can be mutually supplemented and explained:

[0110] Embodiment 1

[0111] The present embodiment provides a type selection matching evaluation method of a hydraulic system of a fully-mechanized coal mining face, including the following steps:

[0112] Obtaining input information of a user, and matching a corresponding selection matching evaluation strategy according to the input information of the user; the input information includes support mainframe system parameters, pump station system parameters and pipeline system parameters.

[0113] Preferably, the support mainframe system parameters at least include mainframe system types, column numbers, support models, column diameters, column rod diameters, column strokes, push rod diameters, push diameters, push strokes, support center distances and support weights.

[0114] The pump station system parameters at least include pump station flow rates, pump station rated pressures, normal coal mining pump station numbers and emulsion pump station types.

[0115] The pipeline system parameters at least include liquid supply modes, working face lengths, liquid inlet pipeline specifications, liquid outlet pipeline specifications and local resistance elements.

[0116] The selection matching evaluation strategy is:

[0117] If the input information includes the support mainframe system parameters, support mainframe moving frame speeds are calculated according to the support mainframe system parameters, and whether the moving frame speeds meet user demands is judged.

[0118] If the input information includes the pipeline system parameters, pipeline resistance losses are calculated according to the pipeline system parameters, and whether the pipeline system selection meets user demands is judged according to whether the pipeline resistance losses exceed preset expected ranges.

[0119] Specifically, multiple parameters can be set through a downward sliding operation in a support system parameter setting interface.

[0120] It can be understood that the pump station system parameters are key factors for selection matching of support mainframe parameter settings and pipeline system parameter settings.

[0121] Generally, a pump station system includes an emulsion pump station group liquid supply system, a pure water pump station group system, a distributed accumulator liquid supply system and a rapid pump control liquid supplement system.

[0122] The emulsion pump station group liquid supply system is a commonly used hydraulic support liquid supply system in a working face at present, and is supplied with liquid and unloaded by multiple emulsion pumps. However, the emulsion pump station output flow rate is step controlled, and the emulsion pump station cannot realize continuous output of the flow rate, so that the liquid supply system frequently and violently fluctuates in a pressure range regulated by an unloading valve, and the system has large impact and low efficiency.

[0123] The pure water pump station group liquid supply system is a system in which a medium of a pump station system is pure water, and is supplied with liquid and unloaded by multiple water medium pump stations, and has the same performance as the emulsion pump station group liquid supply system.

[0124] The distributed accumulator liquid supply system is configured with an accumulator and a check valve on each hydraulic support, balances the contradiction between insufficient large flow supply and excessive average liquid supply capacity of the hydraulic system of the working face in an instant, improves the agility of the liquid supply system, and reduces the impact of the hydraulic system. However, the distributed accumulator liquid supply system increases the complexity of the system and has more uncertain factors.

[0125] The quick pump control liquid supply system is added with a quick response liquid supply loop on the basis of the liquid supply system of the emulsion pump station group in the quick machine following work of the hydraulic support, and the flow of the liquid supply pump is controlled through pressure feedback. However, the quick pump control liquid supply system is only suitable for small and medium power liquid supply systems, and the increase of the liquid supply pump control has little effect on the whole fully mechanized working face system.

[0126] It can be seen that the above different liquid supply systems have different advantages and disadvantages, and are suitable for different scenes, so the user selects according to the actual demand when using.

[0127] The selection and matching evaluation strategy is:

[0128] If the input information includes the support and support system parameters, the support and support moving speed is calculated according to the support and support system parameters, and whether the moving speed meets the user demand is judged.

[0129] If the input information includes the pipeline system parameters, the pipeline resistance loss is calculated according to the pipeline system parameters, and whether the pipeline system selection meets the user demand is judged according to whether the pipeline resistance loss exceeds the preset expected range.

[0130] Embodiment 2:

[0131] This embodiment gives a possible embodiment for calculating the support and support moving speed according to the pump station system parameters and the support and support system parameters.

[0132] In this embodiment, calculating the support and support moving speed according to the support and support system parameters includes:

[0133] According to the column diameter and the column rod diameter, the column descending back pressure is calculated. Specifically, the column descending back pressure calculation formula is: P 回 =(D1 2 -D2 2 ) / D1 2 ×P 额 , D1 is the column diameter, D2 is the column rod diameter, and P 额 is the rated pressure of the pump station.

[0134] According to the column descending back pressure and the preset column descending back pressure loss coefficient, the column descending back flow is calculated. Q 回 =(P 回 / k) 0.5, k is the resistance coefficient of the column descending liquid return.

[0135] In a specific implementation, the resistance coefficient k of the column descending liquid return is equal to the sum of the resistance coefficients of the column descending liquid return of each actuating element in the column-to-tank intermediate liquid supply circuit.

[0136] Generally, the frame system is divided into three categories: a conventional system, a fast liquid return system, and a large-flow liquid supply system.

[0137] Preferably, as shown in the table below, when the frame system type is the conventional system, the column-to-tank intermediate liquid supply circuit has the following actuating elements: a column hydraulic control check valve, a main valve, a liquid return circuit breaker, and a liquid outlet pipeline (which can also be referred to as a liquid return pipeline). Figure 4 , k i is the resistance coefficient of the column descending liquid return of the i-th actuating element.

[0138] As shown in the table below, when the frame system type is the large-flow liquid supply system, the column-to-tank intermediate liquid supply circuit has the following actuating elements: a column hydraulic control check valve, a main valve, a large-flow liquid supply valve, a liquid return circuit breaker, and a liquid outlet pipeline. Figure 5 , k i is the resistance coefficient of the column descending liquid return of the i-th actuating element.

[0139] As shown in the table below, when the frame system type is the fast liquid return system, the column-to-tank intermediate liquid supply circuit has the following actuating elements: a column hydraulic control check valve, a fast liquid return valve, a liquid return circuit breaker, and a liquid outlet pipeline. Figure 6 , k i is the resistance coefficient of the column descending liquid return of the i-th actuating element.

[0140] The column descending time is calculated according to the number of columns, the column diameter, the column descending liquid return flow, and the column descending stroke.

[0141] The column descending time calculation formula is: T j =nL1 / (Q 回 ×10 6 / 60(3.14×D1 2 / 4)), where n is the number of columns, and L1 is the column descending stroke.

[0142] The column ascending time is calculated according to the number of columns, the column diameter, and the pump station flow.

[0143] The column ascending time calculation formula is: T s =nL1 / (3.14×D1 2 / 4) / (Q 泵 ×10 6 ​​​ / 60), wherein Q 泵 is the pump station flow.

[0144] According to the push stroke, the push rod diameter, the area ratio of the lower chamber and the upper chamber of the push jack is calculated, and according to the obtained area ratio, the load of the support, the push stroke, the push liquid pressure of the push jack, the push liquid flow of the push jack, and the preset push liquid return pressure of the push jack, the push time of the push jack is calculated.

[0145] The push time calculation formula of the push jack is: T y =F×L2 / (P T进 Q T进 -P T回 Q T进 / κ);

[0146] wherein F is the load of the support; κ is the area ratio of the lower chamber and the upper chamber of the push jack, and κ =D3 2 / (D3 2 -D4 2 ), D3 is the push cylinder diameter, and D4 is the push rod diameter; L2 is the push stroke; P T进 is the push liquid pressure of the push jack, P T进 =P 额 ; P T回 is the push liquid return pressure of the push jack, P T回 =k 回 Q T回 2 , Q T回 is the push liquid return flow of the push jack, k 回 is the push liquid return resistance coefficient, Q T回 =Q T进 / κ; Q T进 is the push liquid flow of the push jack, Q T进 = Q 泵 , Q 泵 is the pump station flow.

[0147] According to the support center distance, the column lowering time, the column raising time, and the column push time, the support frame moving speed is calculated.

[0148] The support frame moving speed calculation formula is: V 常 =60×support center distance / (T j +T s +T y ).

[0149] The embodiment overcomes the calculation deviation caused by the excessive simplification of the traditional method by establishing a staged accurate calculation model, decomposing the support moving process system into three key action links of lowering column, raising column and pushing, and respectively constructing independent calculation paths. On this basis, the model fully incorporates actual working condition parameters such as lowering column back pressure, pipeline resistance coefficient, jack area ratio and support load, so that the calculation result can accurately reflect the real running state of the hydraulic system.

[0150] Further, the method realizes the quantitative characterization of the dynamic response between the power source and the actuator by closely associating the pump station output characteristics and the support structure parameters. This not only accurately reveals the coupling relationship within the system, but also provides a clear basis for identifying performance bottlenecks. Based on the accurate calculation of each link time, the finally integrated support moving speed result has both theoretical rigor and engineering practicality, which can directly support system matching evaluation and optimization decision.

[0151] This refined calculation method forms a complete technical chain from parameter input, step-by-step calculation to result integration, which not only ensures the accuracy and reliability of the support moving speed evaluation, but also provides scientific theoretical support and quantitative tools for the collaborative design, efficiency optimization and on-site debugging of the hydraulic system.

[0152] Embodiment 3:

[0153] The embodiment provides a possible implementation of calculating the pipeline resistance loss according to the pump station system parameters and the pipeline system parameters.

[0154] The working face liquid supply mode includes single-in single-out, ring liquid supply, and four-in three-out ring liquid supply. In practice, users arrange the working face liquid supply mode according to the actual working conditions in the coal mine.

[0155] After determining the working face liquid supply mode, the total resistance loss value of the inlet pipeline and the outlet pipeline under the current configuration is calculated according to the working face length, the inlet pipeline specification, the outlet pipeline specification and the local resistance element. If the total resistance loss value of any pipeline exceeds its preset range, it is judged that the selection is not matched.

[0156] Specifically, the applicant found through analysis that when the working face liquid supply mode is single-in single-out, the total resistance loss from the pump station system to the support tail bracket inlet pipeline is controlled within the range of 4-5 MPa, and the total resistance loss of the outlet is controlled within the range of 1-4 MPa.

[0157] When the working face liquid supply mode is ring liquid supply, the total resistance loss from the pump station system to the entire working face inlet pipeline is controlled within the range of 4-6 MPa, and the total resistance loss of the outlet is controlled within the range of 2-4 MPa.

[0158] When the working face liquid supply mode is four-in and three-return, and the ring liquid supply, the total resistance loss of the liquid inlet pipeline from the pump station system to the whole working face is controlled in the range of 4-6 MPa, and the total resistance loss of the liquid outlet is controlled in the range of 2-4 MPa.

[0159] In summary, no matter how the pipeline system is arranged, the total resistance loss of the liquid inlet pipeline from the pump station system to the whole working face should be controlled in the range of 4-6 MPa, and the total resistance loss of the liquid outlet should be controlled in the range of 2-4 MPa. The total resistance loss of the pipeline system includes local resistance loss and along-the-way resistance loss.

[0160] Therefore, in one embodiment, the preset expected range of the total resistance loss of the liquid inlet pipeline is set to 4-6 MPa, and the preset expected range of the total resistance loss of the liquid outlet pipeline is set to 2-4 MPa.

[0161] Specifically, the pipeline resistance loss is calculated according to the pipeline system parameters, including:

[0162] The density and kinematic viscosity of the liquid supply fluid are determined according to the type of the emulsion pump station, and the local resistance coefficient of the local resistance element is obtained; the along-the-way and local resistance losses of the liquid inlet pipeline are calculated based on the pump station flow, the liquid inlet pipeline length, the liquid inlet pipeline specification, the density and kinematic viscosity of the liquid supply fluid; the along-the-way and local resistance losses of the liquid outlet pipeline are calculated based on the liquid outlet flow, the liquid outlet pipeline length, the liquid outlet pipeline specification, the density and kinematic viscosity of the liquid supply fluid.

[0163] The total resistance loss of the pipeline is obtained according to the along-the-way and local resistance losses of the liquid inlet pipeline and the along-the-way and local resistance losses of the liquid outlet pipeline.

[0164] The total resistance loss of the liquid inlet pipeline is calculated according to the along-the-way and local resistance losses of the liquid inlet pipeline, and the total resistance loss of the liquid inlet pipeline = the along-the-way resistance loss of the liquid inlet pipeline + the local resistance loss of the liquid inlet pipeline; the total resistance loss of the liquid outlet pipeline is calculated according to the along-the-way and local resistance losses of the liquid outlet pipeline, and the total resistance loss of the liquid outlet pipeline = the along-the-way resistance loss of the liquid outlet pipeline + the local resistance loss of the liquid outlet pipeline.

[0165] In one possible embodiment, when the along-the-way resistance loss of the liquid inlet pipeline is calculated based on the pump station flow, the liquid inlet pipeline length, the liquid inlet pipeline specification, the density and kinematic viscosity of the liquid supply fluid, the Darcy-Weisbach formula is adopted: ΔP 沿程 = λ 进 ×(L 进 / d 进 ) × (ρ × v 进 ² / 2);

[0166] Wherein, L 进 is the liquid inlet pipeline length, d进 is the pipe diameter of the liquid inlet pipeline, and generally, the pipeline specification (nominal bore DN) corresponds to the pipe diameter, for example, DN25 represents a pipe diameter of 25 mm; 进 is the flow rate of the liquid inlet pipeline, v 进 = 4 × Q 泵 / (π × d 进 ²); ρ is the density of the liquid supply fluid, λ 进 is the resistance coefficient along the liquid inlet pipeline, which is related to the Reynolds number Re and the roughness of the pipe wall.

[0167] The local resistance loss formula in the liquid inlet pipeline is: ΔP 进局部 = k 进 ×(ρ×v 进 2 / 2), k 进 is the local resistance coefficient in the liquid inlet pipeline, which is determined according to the type and number of local resistance elements; or k 进 = ρ / (2 *C d ² * A 进 ²), C d is the flow coefficient, and A 进 is the area of the minimum flow passage cross section of the local resistance element.

[0168] It can be understood that the sum of the local resistance losses of the multiple local resistance elements in the liquid inlet pipeline is the local resistance loss of the liquid inlet pipeline.

[0169] In one possible embodiment, when the resistance loss along the liquid outlet pipeline is calculated based on the liquid outlet flow rate, the liquid outlet pipeline length, the liquid outlet pipeline specification, the density of the liquid supply fluid, and the kinematic viscosity, the Darcy-Weisbach formula is used: ΔP 沿程 = λ 出 ×(L 出 / d 出 ) × (ρ × v 出 ² / 2); v 出 is the flow rate of the liquid outlet pipeline, and v 出 = 4 × Q 出 / (π × d 出 ²), L 出 is the liquid outlet pipeline length, d 出 is the pipe diameter of the liquid outlet pipeline, Q 出 is the liquid outlet flow rate of the liquid outlet pipeline, and λ 出 is the resistance coefficient along the liquid outlet pipeline, which is related to the Reynolds number Re and the roughness of the pipe wall.

[0170] The local resistance loss formula in the liquid outlet pipeline is: ΔP 出局部 = k 出 ×(ρ×v 出2 / 2), k 出 is a local resistance coefficient in the liquid outlet pipeline, and the local resistance coefficient is mainly determined according to the type and number of the local resistance element; or k 出 = p / (2 * C d 2 * A 出 2), C d is a flow coefficient, and A 出 is the area of the minimum flow passage section of the local resistance element.

[0171] It can be understood that the sum of the local resistance losses of the plurality of local resistance elements in the liquid outlet pipeline is the local resistance loss of the liquid outlet pipeline.

[0172] In particular, the pipeline system parameters need to consider the type of the system and the column diameter. The specific configuration rules are as follows:

[0173] The conventional system configuration (that is, when the system type is a conventional system) is as follows:

[0174] (1) Column jack diameter ≤ 250 mm:

[0175] 1) Install an electric backwash filter (manual backwash filter) with a flow rate of 500 L / min in the liquid inlet pipe of each support;

[0176] 2) The flow rate of the electro-hydraulic reversing valve interface of each support is 200 L / min and 125 L / min, and the corresponding valve string of the column is one-to-two;

[0177] 3) Install a 500 L / min liquid return circuit valve in the liquid return pipe of each support;

[0178] 4) Install a 500 L / min safety valve on each column;

[0179] 5) Install a 200 L / min column hydraulic control check valve on each column;

[0180] 6) Install a 200 L / min pusher check valve and a 250 L / min safety valve in the pusher system of each support;

[0181] 7) Install a 125 L / min balance bidirectional lock and a 250 L / min safety valve in the balance jack of each support;

[0182] 8) The flow rate of the hydraulic auxiliary valve configured in the side push, bottom lifting, bottom adjustment, telescopic beam, support, plug plate, front beam, etc. system is not less than 125 L / min.

[0183] (2) Column jack diameter greater than 250 mm and less than or equal to 420 mm:

[0184] 1) Each support liquid inlet pipe installation electric backwash filter (manual backwash filter), flow 900L / min;

[0185] 2) Each support electro-hydraulic reversing valve interface flow has 500L / min and 200L / min, the corresponding column reversing valve valve string is one-to-one;

[0186] 3) Each support back liquid pipe installation 900L / min back liquid circuit breaker valve;

[0187] 4) Each column is installed 1000L / min and 250L / min combination safety valve;

[0188] 5) Each column is installed a 480L / min column hydraulic control check valve;

[0189] 6) Each support push system installation 480L / min push check valve and 250L / min safety valve;

[0190] 7) Each support balance jack installation 500L / min balance bidirectional lock and 250L / min safety valve;

[0191] 8) Side push, lift the bottom, bottom adjustment, telescopic beam, guard, plug, front beam and other systems configured hydraulic auxiliary valve flow is not less than 250L / min.

[0192] (3) Column jack diameter greater than 420mm less than or equal to 530mm:

[0193] 1) Each support liquid inlet pipe installation electric backwash filter (manual backwash filter), flow 900L / min;

[0194] 2) Each support electro-hydraulic reversing valve interface flow has 500L / min and 200L / min, the column uses double valve string;

[0195] 3) Each support back liquid pipe installation 900L / min back liquid circuit breaker valve;

[0196] 4) Each column is installed 1000L / min and 250L / min combination safety valve;

[0197] 5) Each column is installed less than 800L / min column hydraulic control check valve;

[0198] 6) Each support push system installation 480L / min push check valve and 250L / min safety valve;

[0199] 7) Each support balance jack installed 500L / min balance bidirectional lock and 250L / min safety valve;

[0200] 8) The flow of hydraulic auxiliary valves configured in side push, bottom lifting, bottom adjustment, telescopic beam, guard, plug-in plate, front beam and other systems is not less than 250L / min.

[0201] (4) The cylinder diameter of the column jack is greater than 530mm:

[0202] 1) Each support liquid inlet pipe is installed with an electric backwash filter (manual backwash filter), with a flow of 900L / min;

[0203] 2) Each support electro-hydraulic reversing valve interface flow has 1000L / min and 200L / min, and an additional 1600L / min quick return liquid one-way valve;

[0204] 3) Each support return liquid pipe is installed with a 900L / min return liquid circuit breaker valve;

[0205] 4) Each column is installed with a combination safety valve of 4000L / min and 1000L / min;

[0206] 5) Each column is installed with an 1600L / min column hydraulic control one-way valve;

[0207] 6) Each support push system is installed with a 480L / min push one-way lock and a 250L / min safety valve;

[0208] 7) Each support balance jack is installed with a 500L / min balance bidirectional lock and a 250L / min safety valve;

[0209] 8) The flow of hydraulic auxiliary valves configured in side push, bottom lifting, bottom adjustment, telescopic beam, guard, plug-in plate, front beam and other systems is not less than 250L / min.

[0210] Quick return liquid system (i.e. when the system type of the support is quick return liquid system) configuration selection:

[0211] For column jack cylinder diameter greater than or equal to 400mm and less than 450mm, in order to improve the support column lowering speed, the support support system will generally be configured with a quick return liquid valve, the specific configuration is as follows:

[0212] 1) Each support liquid inlet pipe is installed with an electric backwash filter (manual backwash filter), with a flow of 900L / min;

[0213] 2) Each support electro-hydraulic reversing valve interface flow has 500L / min and 200L / min, and the column adopts double valve series;

[0214] 3) Each support's return pipe is installed with a 900L / min return circuit valve;

[0215] 4) Each column is installed with a 1000L / min and 250L / min combined safety valve;

[0216] 5) Each column is installed with a 630L / min column hydraulic control one-way valve and a 500L / min fast return valve;

[0217] 6) Each support's push system is installed with a 480L / min push one-way lock and a 250L / min safety valve;

[0218] 7) Each support's balance jack is installed with a 500L / min balance two-way lock and a 250L / min safety valve;

[0219] 8) The flow of hydraulic auxiliary valves configured in the side push, bottom lifting, bottom adjustment, telescopic beam, guard, plug plate, front beam, etc. system is not less than 250L / min.

[0220] Large-flow liquid supply system configuration (i.e. when the system type of the support is large-flow liquid supply system):

[0221] For the column jack cylinder diameter greater than 450mm and less than or equal to 530mm, the support support system generally configures a large-flow liquid supply valve, the specific configuration is as follows:

[0222] 1) Each support's liquid inlet pipe is installed with an electric backwashing filter (manual backwashing filter), with a flow of 900L / min;

[0223] 2) Each support's electro-hydraulic reversing valve interface flow is 500L / min and 200L / min, the column uses double valve series, and a 1000L / min large-flow liquid supply valve is configured;

[0224] 3) Each support's return pipe is installed with a 900L / min return circuit valve;

[0225] 4) Each column is installed with a 1000L / min and 250L / min combined safety valve;

[0226] 5) Each column is installed with an 800L / min column hydraulic control one-way valve;

[0227] 6) Each support's push system is installed with a 480L / min push one-way lock and a 250L / min safety valve;

[0228] 7) Each support's balance jack is installed with a 500L / min balance two-way lock and a 250L / min safety valve;

[0229] 8) The flow of the auxiliary hydraulic valve configured in the side pushing, bottom lifting, bottom adjusting, telescopic beam, support, plug-in plate, front beam and other systems is not less than 250 L / min.

[0230] It should be understood that, although each step in the flowchart involved in the above embodiments is shown in sequence according to the arrow, these steps are not necessarily executed in the order indicated by the arrow. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least part of the steps in the flowchart involved in the above embodiments can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily sequential, but can be alternately executed with at least part of other steps or steps or stages in other steps.

[0231] Embodiment 4:

[0232] As Figure 2 shown, based on the same inventive concept, the present application also provides a selection and matching evaluation system of a hydraulic system of a fully mechanized coal mining face. The implementation scheme for solving the problem provided by the system is similar to the implementation scheme described in Embodiment 1 or 2 or 3, so the specific limitations in one or more selection and matching evaluation system embodiments provided below can refer to the related limitations in Embodiment 1, which will not be repeated here.

[0233] The selection and matching evaluation system of the hydraulic system of the fully mechanized coal mining face comprises:

[0234] A strategy selection module is configured to obtain input information of a user and match a corresponding selection and matching evaluation strategy according to the input information of the user.

[0235] A support and carrier moving speed calculation module is connected with the strategy selection module and is configured to calculate a support and carrier moving speed according to the support and carrier system parameters.

[0236] A pipeline resistance loss calculation module is connected with the strategy selection module and is configured to calculate a pipeline resistance loss according to the pipeline system parameters.

[0237] A matching module is connected with the support and carrier moving speed calculation module and / or the pipeline resistance loss calculation module, and is configured to determine whether the selection of the support and carrier system is matched and / or whether the selection of the pipeline system is matched according to the support and carrier moving speed and / or the total pipeline resistance loss.

[0238] The embodiment details the specific hardware and software implementation of the selection and matching evaluation system of the hydraulic system of the fully mechanized coal mining face, aiming to ensure that the skilled person in the art can construct and implement the system without creative labor.

[0239] 1. System architecture and hardware foundation

[0240] The selection and matching evaluation system is deployed in an industrial control computer or a high-performance server. The system includes a multi-core central processing unit, random access memory, solid state disk storage, a gigabit Ethernet communication interface, a display output interface (such as HDMI), and multiple user input interfaces (such as USB). These hardware components are electrically connected and exchange data through the system bus on the motherboard. The system runs the Windows Server or Linux operating system and is installed with the Java runtime environment or Python interpreter for executing the evaluation system software.

[0241] 2. Module implementation and direct connection relationship

[0242] The evaluation system software is developed using a layered architecture, and its core functional modules include a strategy selection module, a support moving speed calculation module, a pipeline resistance loss calculation module, and a matching module. These modules exist in the form of software code packages, and the connection between modules is realized through explicit function calls and parameter passing.

[0243] 2.1 Strategy selection module

[0244] Function: This module serves as the input dispatch center of the system, responsible for receiving and parsing user instructions and deciding the subsequent calculation process.

[0245] Implementation: The strategy selection module includes a graphical user interface submodule and a logical judgment submodule. The graphical user interface submodule uses HTML5 and JavaScript technology to draw a Web form, which includes two independent button controls labeled "Execute support and support matching evaluation" and "Execute pipeline system matching evaluation".

[0246] Connection method and data flow: When the user clicks the "Execute support and support matching evaluation" button, the graphical user interface submodule captures the click event through a JavaScript event listener function. Then, the logical judgment submodule calls an internal function named setEvaluationStrategy("strategyA") to set the strategy flag to "corresponding to the support and support system", and passes a JSON data object containing the support and support system parameters as a parameter to the entry function of the support moving speed calculation module. If the user clicks the other button, the strategy flag is set to "corresponding to the pipeline system", and the pipeline system parameters are passed to the pipeline resistance loss calculation module.

[0247] 2.2 Support moving speed calculation module

[0248] Function: This module calculates the support moving speed according to the parameters from the strategy selection module, providing key data for matching judgment.

[0249] Implementation: The support moving speed calculation module is an independent dynamic link library written in C++ to improve calculation efficiency. The module encapsulates all functions that implement the support moving speed calculation model, including the calculateP_back() function (for calculating the back pressure of the descending column), the calculateQ_back() function (for calculating the descending column backflow), the calculateT_j(), calculateT_s(), and calculateT_y() functions (for calculating the descending column, ascending column, and pushing time, respectively), and the final calculateV() function (for calculating the support moving speed).

[0250] Connection method and data flow: This module receives the support system parameter structure from the strategy selection module through a public application programming interface function, such as doublecalculateVelocity(StructSupportParameters params). The module internally calls the above functions in order, with the output of each function serving as the input parameter for the next function, forming an internal data flow. The final support moving speed value (a double-precision floating-point number) is returned as the return value and directly output to the matching module.

[0251] 2.3 Pipeline resistance loss calculation module

[0252] Function: This module is responsible for calculating the total resistance loss of the pipeline system and evaluating the rationality of pipeline selection.

[0253] Implementation: This module is also implemented as a software library, mainly using the Darcy-Weisbach formula to calculate the resistance loss along the inlet and outlet pipelines, and using the local resistance coefficient method to calculate the local resistance loss.

[0254] Connection method and data flow: This module receives the pipeline system parameters from the strategy selection module through an interface function named double calculatePressureLoss(StructPipelineParameters params). The module internally selects the corresponding calculation branch according to the supply mode (such as single inlet and single return), calculates the resistance loss of the inlet and outlet pipelines, and sums them up to obtain the total resistance loss value (unit: megapascal), which is directly output as the return value to the matching module.

[0255] 2.4 Matching Module

[0256] Function: This module is the system's decision-making unit. By comparing the calculation results with preset standards, it provides the final selection and matching conclusion.

[0257] Specific implementation: The matching module is a lightweight logic judgment module. The module internally stores the user's preset requirements for the moving speed (e.g., not less than 0.08 m / min) and the preset expected range of total pipeline resistance loss (e.g., 4~6 MPa for inlet pipeline and 2~4 MPa for outlet pipeline).

[0258] Connection Method and Data Flow: The matching module actively calls the output results of the mover speed calculation module or the pipeline resistance loss calculation module. Specifically, the matching module includes a judgment function that first reads the strategy flag set by the strategy selection module. If the strategy flag is "corresponding to the support system," the `calculateVelocity` function is called to obtain the mover speed, and this speed value is compared with the preset requirement value to determine whether the requirement is met (returning a Boolean value "true" or "false"). If the strategy flag is "corresponding to the pipeline system," the `calculatePressureLoss` function is called to obtain the total resistance loss and determine whether it is within the preset expected range (returning a Boolean value "true" or "false"). The final Boolean judgment result will be displayed to the user through a graphical user interface.

[0259] 3. System Integration and Operational Results

[0260] This system constructs a complete automated evaluation process through the collaborative work of the four modules mentioned above. The strategy selection module ensures precise guidance of the evaluation path; the two calculation modules, based on specific physical models and mathematical formulas, transform complex engineering calculations into executable code, guaranteeing the accuracy and repeatability of the calculation results; and the matching module provides objective quantitative judgment criteria. This modular design makes the system structure clear, with well-defined responsibilities for each module. Direct function calls and data transfer ensure the system's efficient operation, ultimately achieving rapid, accurate, and automated evaluation of the matching suitability of the hydraulic system selection for fully mechanized mining faces, completely changing the traditional outdated model that relies on manual experience.

[0261] Example 5:

[0262] This embodiment provides a computer device, which may be a terminal, and its internal structure diagram may be as follows. Figure 3 As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device.

[0263] The processor, the memory and the input / output interface are connected through the system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory.

[0264] The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run.

[0265] The input / output interface of the computer device is used to exchange information between the processor and external devices.

[0266] The communication interface of the computer device is used to communicate with external terminals in a wired or wireless manner. The wireless manner can be achieved through WIFI, mobile cellular network, NFC (Near Field Communication) or other technologies.

[0267] The computer program is executed by the processor to implement the method of embodiment 1.

[0268] The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer overlaid on the display screen, or a key, trackball or touchpad arranged on the shell of the computer device, or an external keyboard, touchpad or mouse, etc.

[0269] Those skilled in the art can understand that, Figure 3 The structure shown in the above embodiments is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. A specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0270] Embodiment 6:

[0271] On the basis of the above embodiments, the present embodiment provides a computer readable storage medium having a computer program stored thereon, and the computer program is executed by the processor to implement the steps of embodiment 1.

[0272] Embodiment 7:

[0273] On the basis of the above embodiments, the present embodiment provides a computer program product including a computer program, and the computer program is executed by the processor to implement the steps of embodiment 1.

[0274] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned embodiments can be included. Any reference to memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0275] Any combination of the technical features of the above embodiments can be made, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist, it should be considered as the scope of the present application.

[0276] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The application is intended to cover any variations, uses or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the application pertains. The specification and examples are to be construed as merely illustrative of the present application and not limitative of the true scope and spirit of the application, which is measured by the claims.

[0277] It is to be understood that the application is not limited to the precise construction already described above and shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application should only be limited by the claims appended hereto.

Claims

1. A method for selecting, matching, and evaluating the hydraulic system of a fully mechanized mining face, characterized in that, The method includes: Obtain user input information, which includes support frame system parameters and piping system parameters, wherein the support frame system parameters are applied to the support frame system and the piping system parameters are applied to the piping system; The corresponding selection and evaluation strategy is matched based on the input information; If the selection matching evaluation strategy corresponds to the support frame system, then based on the support frame system parameters, the support frame moving speed is calculated using a moving speed calculation model, and the support frame system selection matching is determined based on whether the support frame moving speed meets the user's preset moving speed requirement value; wherein, the support frame system parameters include at least the frame system type, number of columns, support model, column cylinder diameter, column rod diameter, column stroke, column lowering stroke, push rod diameter, push cylinder diameter, push stroke, support center distance, and support weight; the calculation of the support frame moving speed based on the support frame system parameters using the moving speed calculation model includes: calculating the column lowering return fluid back pressure based on the column cylinder diameter and the column rod diameter; calculating the column lowering return fluid flow rate based on the column lowering return fluid back pressure and the preset column lowering return fluid resistance coefficient; calculating the column lowering time based on the number of columns, column cylinder diameter, column lowering return fluid flow rate, and column lowering stroke; and obtaining the pump station flow rate Q from the pump station system parameters. 泵 The column lifting time is calculated based on the number of columns, the column cylinder diameter, and the pump station flow rate; the area ratio of the lower and upper chambers of the pushing jack is calculated based on the pushing cylinder diameter and the pushing rod diameter; the pushing time of the pushing jack is calculated based on the obtained area ratio, the load on the support, the pushing stroke, the pushing jack inlet pressure, the pushing jack inlet flow rate, and the preset pushing jack return pressure; the frame movement speed is calculated based on the center distance of the support, the column lowering time, the column lifting time, and the pushing time of the pushing jack. If the selection matching evaluation strategy corresponds to the pipeline system, then based on the pipeline system parameters, the total pipeline resistance loss is calculated using a pipeline resistance loss calculation model, and the matching of the pipeline system selection is determined based on whether the total pipeline resistance loss exceeds a preset expected range. The pipeline system parameters include at least the liquid supply method, working face length, inlet pipeline specifications, outlet pipeline specifications, local resistance elements, inlet pipe length, and outlet pipe length. The calculation of the total pipeline resistance loss based on the pipeline system parameters using the pipeline resistance loss calculation model includes: obtaining the emulsion pump station type, determining the supply fluid density and transport... The system calculates the kinematic viscosity and obtains the local resistance coefficient of the local resistance element; it obtains the pump station flow rate from the pump station system parameters, calls the corresponding resistance loss calculation formula according to the liquid supply method, and calculates the friction loss and local resistance loss of the inlet pipe based on the pump station flow rate, the length of the inlet pipe, the specifications of the inlet pipe, the density of the supply fluid, and the kinematic viscosity; it calculates the friction loss and local resistance loss of the outlet pipe based on the outlet flow rate, the length of the outlet pipe, the specifications of the outlet pipe, the density of the supply fluid, and the kinematic viscosity; and obtains the total pipeline resistance loss based on the friction loss and local resistance loss of the inlet pipe and the friction loss and local resistance loss of the outlet pipe.

2. The method for selecting, matching, and evaluating the hydraulic system of a fully mechanized mining face according to claim 1, characterized in that: The formula for calculating the back pressure of the column return fluid is: P 回 =(D1 2 -D2 2 ) / D1 2 ×P 额 ; The formula for calculating the return flow rate of the column is: Q 回 =(P 回 / k) 0.5 ; Where D1 is the cylinder diameter of the column, D2 is the rod diameter of the column, k is the resistance coefficient of the column return fluid, and P 额 This refers to the rated pressure of the pumping station.

3. The method for selecting, matching, and evaluating the hydraulic system of a fully mechanized mining face according to claim 2, characterized in that: The formula for calculating the column lowering time is: T j =nL1 / (Q 回 ×10 6 / 60(3.14×D1 2 / 4)); The formula for calculating the column raising time is: T s =nL1 / (3.14×D1 2 / 4) / (Q 泵 ×10 6 / 60); The formula for calculating the pushing time of the pushing jack is: T y =F×L2 / (P T进 Q T进 -P T回 Q T进 / κ); The formula for calculating the moving speed of the support frame is: V 常 =60 × center distance of the support / (T) j +T s +T y ); In the formula, n is the number of columns, L1 is the column lowering stroke, F is the load on the support; κ is the area ratio of the lower cavity and the upper cavity of the jack, and κ = D3 2 / (D3 2 -D4 2 D3 is the pusher cylinder diameter, D4 is the pusher rod diameter; L2 is the pusher stroke; P T进 To shift the hydraulic pressure of the jack, P T进 =P 额 ;P T回 To reduce the return pressure of the jack, P T回 =k 回 Q T回 2 Q T回 To increase the return flow rate of the jack, k 回 To shift the return fluid resistance coefficient, Q T回 = Q T进 / κ;Q T进 To increase the inlet flow rate of the jack, Q T进 = Q 泵 Q 泵 This refers to the flow rate of the pumping station.

4. The selection and matching evaluation method for the hydraulic system of a fully mechanized mining face according to claim 1, characterized in that: When the frame system is a conventional system, the actuators in the intermediate liquid supply circuit from the column to the oil tank are the column hydraulic control check valve, the main valve, the return liquid shut-off valve, and the liquid outlet pipeline. When the type of the frame system is a high-flow liquid supply system, the actuators in the intermediate liquid supply circuit from the column to the oil tank are the column hydraulic control check valve, the main valve, the high-flow liquid supply valve, the return liquid shut-off valve, and the liquid outlet pipeline. When the frame system is a rapid return system, the actuators in the intermediate liquid supply circuit from the column to the oil tank are the column hydraulic control check valve, the rapid return valve, the return circuit breaker valve, and the outlet pipeline.

5. A selection and matching evaluation system for the hydraulic system of a fully mechanized mining face, characterized in that, The evaluation system applies the evaluation method according to any one of claims 1-4, and the evaluation system comprises: The strategy selection module is used to obtain user input information and match the corresponding selection and evaluation strategy based on the user input information; A frame movement speed calculation module, which is connected to the strategy selection module, is used to calculate the frame movement speed of the support frame based on the frame system parameters. A pipeline resistance loss calculation module, which is connected to the strategy selection module, is used to calculate pipeline resistance loss based on the pipeline system parameters; A matching module is connected to the moving speed calculation module and / or the pipeline resistance loss calculation module. The matching module is used to determine whether the selection of the support system is suitable based on the moving speed of the support and / or the total pipeline resistance loss, and / or to determine whether the selection of the pipeline system is suitable.

6. A computer device, characterized in that: It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, when executing a program stored in memory, implements the steps of the evaluation method as described in any one of claims 1 to 4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the evaluation method according to any one of claims 1 to 4.

8. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the evaluation method according to any one of claims 1 to 4.

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