Method and device for monitoring state of pull rod nut of fracturing pump and computer equipment

Abstract

The invention relates to the technical field of fracturing pumps, and discloses a fracturing pump pull rod nut state monitoring method, a fracturing pump comprises a power end, a fluid end, a pull rod, a pull rod nut, a gasket and a pressure sensor, the pressure sensor is arranged on the outer ring face of the gasket, and the gasket is located between the pull rod nut and the fluid end. The method comprises the following steps: acquiring pre-tightening force data of a pull rod nut and a fluid end through a pressure sensor; according to the pre-tightening force data, the state of the pull rod nut is determined and used for overhauling the pull rod nut and the pull rod. According to the technical scheme, the problem that accurate monitoring and timely maintenance of the states of the pull rod nut and the pull rod are difficult to achieve is solved, and accurate monitoring and timely maintenance of the states of the pull rod nut and the pull rod are achieved.

Description

Technical Field

[0001] This application relates to the field of fracturing pump technology, specifically to a method, device, and computer equipment for monitoring the condition of fracturing pump tie rod nuts. Background Technology

[0002] Fracturing technology is widely used for enhancing oil and gas well production and increasing water injection in wells, and is currently one of the effective measures for improving oil and gas well recovery rates in oilfields. As the core equipment in fracturing operations, the reliability of the fracturing pump is of paramount importance.

[0003] In practical applications, the power and hydraulic ends of fracturing pumps are connected by tie rods. During pump operation, these tie rods are subjected to severe alternating pressures, making them prone to cracking and even breakage. Under high-pressure conditions, the lifespan of tie rods is typically less than 1000 hours, while in lower-pressure areas, it can be 1000 to 2000 hours. If a tie rod breakage is not detected in time, it can lead to increased stress on other tie rods, eventually creating a chain reaction that results in the complete breakage of all tie rods and the detachment of the hydraulic end of the fracturing pump – a catastrophic accident that severely disrupts normal operations and causes significant losses.

[0004] Currently, tie rod condition monitoring primarily relies on construction personnel periodically checking the tightness of the tie rod nuts to determine the tie rod's condition. If the nuts are loose, the tie rod's condition needs to be inspected. If the tie rod has no cracks, the nuts should be tightened promptly (loose nuts can easily lead to tie rod breakage). If the tie rod has cracks, it needs to be replaced, and the nuts retightened. In short, if the nuts are loose, the tie rod is in an abnormal condition and requires maintenance of both the tie rod and the nuts.

[0005] Therefore, in related technologies, accurate monitoring and timely maintenance of the condition of tie rod nuts have become urgent technical problems to be solved. Summary of the Invention

[0006] In view of this, embodiments of this application provide a method, apparatus, and computer equipment for monitoring the condition of a fracturing pump tie rod nut, in order to solve the above-mentioned technical problems.

[0007] In a first aspect, embodiments of this application provide a method for monitoring the state of a fracturing pump tie rod nut. The fracturing pump includes a power end, a hydraulic end, a tie rod, a tie rod nut, a gasket, and a pressure sensor. The pressure sensor is disposed on the outer annular surface of the gasket, which is located between the tie rod nut and the hydraulic end. The method includes:

[0008] The preload data between the tie rod nut and the hydraulic end is obtained through a pressure sensor;

[0009] Based on the preload data, determine the condition of the tie rod nut. This condition is used for maintenance of the tie rod nut and tie rod.

[0010] In one possible implementation, determining the state of the tie rod nut based on preload data includes:

[0011] Determine whether the preload data is within a reasonable range;

[0012] If so, the initial preload data corresponding to the preload data is found in the lookup table of preload data and initial preload data. Otherwise, an alarm is triggered on the status of the tie rod nut based on the preload data. The preload data stored in the lookup table of preload data and initial preload data corresponds one-to-one with the initial preload data. The initial preload data indicates that the tie rod nut and the hydraulic end are normally connected.

[0013] Determine the state of the tie rod nut based on the initial preload data.

[0014] In one possible implementation, an alarm is issued regarding the state of the tie rod nut based on preload data, including:

[0015] If the preload data is less than or equal to the first preset threshold, the alarm indicates that the tie rod nut is loose.

[0016] If the rate of change of the preload data is greater than or equal to the second preset threshold, the alarm tie rod nut is in an overload state.

[0017] In one possible implementation, determining the state of the tie rod nut based on initial preload data includes:

[0018] The target preload fluctuation range corresponding to the initial preload data is determined from the lookup table of initial preload data and preload fluctuation range. The preload fluctuation range indicates the pressure range that the tie rod nut can withstand. The lookup table of initial preload data and preload fluctuation range indicates the one-to-one correspondence between multiple initial preload data and multiple preload fluctuation ranges.

[0019] Determine whether the preload data is within the target preload fluctuation range;

[0020] If so, the tie rod nut is in normal condition; otherwise, the condition of the tie rod nut is determined based on the rate of change of the preload data.

[0021] In one possible implementation, determining the state of the tie rod nut based on the rate of change of the preload data includes:

[0022] If the rate of change of the preload data is less than the third preset threshold, the alarm tie rod nut is in a first-level abnormal state.

[0023] If the rate of change of the preload data is greater than or equal to the fourth preset threshold, the alarm tie rod nut is in a level two abnormal state, and the severity of level two abnormality is higher than that of level one abnormality.

[0024] In one possible implementation, before determining the target preload fluctuation range corresponding to the initial preload data from a lookup table of initial preload data and preload fluctuation range, the method further includes:

[0025] The preload data of the tie rod nut under normal working conditions is collected as a function of time.

[0026] Determine the range of preload fluctuation based on the variation curve.

[0027] In one possible implementation, after determining that the state of the tie rod nut is any one of the following: overload state, loose state, first-level abnormal state, and second-level abnormal state, the method further includes:

[0028] Stop the fracturing pump and check for malfunctions.

[0029] Secondly, embodiments of this application provide a condition monitoring device for a fracturing pump tie rod nut. The fracturing pump includes a power end, a hydraulic end, a tie rod, a tie rod nut, a gasket, and a pressure sensor. The pressure sensor is disposed on the outer annular surface of the gasket, which is located between the tie rod nut and the hydraulic end. The device includes:

[0030] The acquisition module is used to acquire the preload data between the tie rod nut and the hydraulic end through a pressure sensor;

[0031] The determination module is used to determine the status of the tie rod nut based on the preload data. The status is used for maintenance of the tie rod nut and tie rod.

[0032] Thirdly, embodiments of this application provide a computer device, including: a memory and a processor, which are interconnected. The memory stores computer instructions, and the processor executes the computer instructions to perform the fracturing pump tie rod nut status monitoring method described in the first aspect or any corresponding embodiment.

[0033] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer instructions, which are used to cause a computer to execute the fracturing pump tie rod nut status monitoring method of the first aspect or any corresponding embodiment described above.

[0034] Fifthly, embodiments of this application provide a computer program product, including computer instructions, which are used to cause a computer to execute the fracturing pump tie rod nut status monitoring method described in the first aspect or any corresponding embodiment.

[0035] This application provides a method for monitoring the condition of a fracturing pump tie rod nut, which achieves the following technical advantages compared to existing technologies: A pressure sensor is installed on the outer ring surface of a gasket, which is located between the tie rod nut and the hydraulic end. This allows for accurate acquisition of the pressure of the tie rod nut, reflecting the fixation status of the tie rod and the tie rod nut. The pressure sensor obtains preload data between the tie rod nut and the hydraulic end, providing preload data for tie rod nut condition monitoring. Based on the preload data, the condition of the tie rod nut is determined, and this condition is used for maintenance of the tie rod nut and tie rod. This achieves accurate monitoring and timely maintenance of the tie rod nut and tie rod condition. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a schematic flowchart of a fracturing pump tie rod nut condition monitoring method according to an embodiment of this application;

[0038] Figure 2 This is a schematic diagram of a fracturing pump according to an embodiment of this application;

[0039] Figure 3 This is a schematic diagram of the installation of a pressure sensor for a tie rod nut according to an embodiment of this application;

[0040] Figure 4 This is a flowchart illustrating another method for monitoring the condition of a fracturing pump tie rod nut according to an embodiment of this application.

[0041] Figure 5 This is a schematic flowchart of a method for controlling a fracturing pump based on the status monitoring data of the fracturing pump tie rod nut according to an embodiment of this application;

[0042] Figure 6 This is a schematic diagram illustrating the configuration of a condition monitoring system for a fracturing pump tie rod nut according to an embodiment of this application;

[0043] Figure 7 This is a structural block diagram of the condition monitoring device for the fracturing pump tie rod nut according to an embodiment of this application;

[0044] Figure 8 This is a schematic diagram of the hardware structure of a computer device according to an embodiment of this application;

[0045] Figure label:

[0046] 21: Power end, 22: Tie rod, 23: Hydraulic end, 24: Tie rod nut, 25: Pressure sensor, 31: Gasket. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] To address the adverse effects of sudden breakage of fracturing pump tie rods, such as additional costs and safety issues, this application provides a method for monitoring the status of fracturing pump tie rod nuts. This method monitors the operating status of the tie rod nuts in real time and performs timely repairs on the tie rods and nuts based on the monitoring results, thereby reducing the frequency of maintenance, improving safe operation efficiency, and ensuring the safety of equipment and personnel.

[0049] According to an embodiment of this application, a method for monitoring the condition of a fracturing pump tie rod nut is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0050] This application provides a method for monitoring the condition of a fracturing pump tie rod nut. The fracturing pump includes a power end, a hydraulic end, a tie rod, a tie rod nut, a gasket, and a pressure sensor. The pressure sensor is disposed on the outer annular surface of the gasket, which is located between the tie rod nut and the hydraulic end. This method is applied to the controller of the fracturing pump. Figure 1 This is a flowchart of a fracturing pump tie rod nut condition monitoring method according to an embodiment of this application, such as... Figure 1 As shown, the process includes the following steps:

[0051] Step S101: Obtain the preload data of the tie rod nut and the hydraulic end through the pressure sensor.

[0052] A fracturing pump is a mechanical engineering device that provides a high-pressure fluid power source for oil well fracturing operations. Its core function is to pump high-pressure fluid to induce fractures in oil and gas reservoirs, thereby improving oil and gas extraction efficiency. The power end is the core component that converts the rotational motion of an engine or drive motor into the reciprocating motion of a plunger, mainly including mechanical transmission components such as crankshafts and connecting rods. The hydraulic end is the core component in the fracturing pump that converts the mechanical energy generated by the power end into the pressure energy of the fracturing fluid. A pressure sensor is a device that converts the pressure generated by an object under force into a measurable electrical signal, used to measure the pressure of the tie rod nut on the gasket. The tie rod nut is the nut that fixes the hydraulic end to the power end via a tie rod. The preload force is the compressive force generated after the tie rod nut and hydraulic end are tightened, as collected by the pressure sensor. The pressure sensor can be used to collect the preload force data of the tie rod nut and hydraulic end.

[0053] In one possible implementation, the preload data of the tie rod nut and the hydraulic end is measured by an annular strain gauge pressure sensor deployed on the outer ring of the gasket.

[0054] In one example of an embodiment of this application,

[0055] Figure 2 This is a schematic diagram of a fracturing pump according to an embodiment of this application. Figure 2 As shown, the fracturing pump includes a power end 21, a tie rod 22, a hydraulic end 23, a tie rod nut 24, and a pressure sensor 25. The power end 21 and the hydraulic end 23 are connected by the tie rod 22, and the hydraulic end 23 is fixed to the side of the tie rod 22 that is offset from the power end 21. The hydraulic end 23 is fastened to the tie rod 22 by the tie rod nut 24, and a pressure sensor 25 is installed between the hydraulic end 22 and the tie rod nut 24.

[0056] In one example of an embodiment of this application,

[0057] Figure 3 This is a schematic diagram illustrating the installation of a pressure sensor for a tie rod nut according to an embodiment of this application. Figure 3 A pressure sensor 25 is fitted around the periphery of the gasket 31. The gasket has a ring-shaped structure, and the pull rod passes through the center of the gasket. The pressure sensor 25 can measure the pressure values ​​of the pull rod nut and the hydraulic end. (This figure is combined with...) Figure 2 This allows for the convenient placement of pressure sensors around the gasket without taking up additional space, and accurately measures the pressure data applied to the tie rod nut.

[0058] Step S102: Determine the state of the tie rod nut based on the preload data. The state is used for maintenance of the tie rod nut and tie rod.

[0059] Based on the preload data, the pressure data between the tie rod nut and the hydraulic end can be obtained. This pressure data originates from the force between the tie rod and the tie rod nut. The power end drives the plunger movement of the hydraulic end, which is connected to the tie rod through the tie rod nut. The state of the tie rod nut can be determined from the preload data. For example, if the preload data is close to 0, it indicates that the tie rod nut is loose and may detach from the tie rod, or the tie rod may break. If the preload data exceeds a threshold, it indicates that the tie rod nut is overloaded, or the tie rod is overloaded. Based on the state of the tie rod nut, both the tie rod nut and the tie rod can be inspected, thus achieving accurate monitoring and timely maintenance of their condition.

[0060] The fracturing pump tie rod nut condition monitoring method provided in this embodiment uses a pressure sensor mounted on the outer annular surface of a gasket positioned between the tie rod nut and the hydraulic end. This gasket accurately collects the pressure of the tie rod nut, reflecting the fixation status of the tie rod and nut. The pressure sensor acquires preload data between the tie rod nut and the hydraulic end, providing preload data for tie rod nut condition monitoring. Based on this preload data, the condition of the tie rod nut is determined, and this condition is used for maintenance of the tie rod nut and tie rod. This method achieves accurate monitoring and timely maintenance of the tie rod nut and tie rod condition.

[0061] This application provides a method for monitoring the condition of a fracturing pump tie rod nut, which can be used in the controller of the aforementioned fracturing pump. Figure 4 This is a flowchart of another fracturing pump tie rod nut condition monitoring method according to an embodiment of this application, such as... Figure 4 As shown, the process includes the following steps:

[0062] Step S401: Obtain the preload data of the tie rod nut and the hydraulic end through the pressure sensor.

[0063] Please see details Figure 1 Step S101 of the illustrated embodiment will not be described again here.

[0064] Step S402: Determine the state of the tie rod nut based on the preload data.

[0065] Specifically, step S402 includes:

[0066] Step S4021: Determine whether the preload data is within a reasonable range.

[0067] The reasonable value range refers to the range of maximum and minimum values ​​among the preload data recorded by the fracturing pump during normal operation. This reasonable value range is used as a reference to determine whether the preload data falls within it.

[0068] Step S4022: If yes, then look up the initial preload data corresponding to the preload data in the lookup table of preload data and initial preload data; otherwise, issue an alarm for the status of the tie rod nut based on the preload data. The lookup table of preload data and initial preload data stores a one-to-one correspondence between the preload data and the initial preload data. The initial preload data indicates that the tie rod nut and the hydraulic end are properly connected.

[0069] Initial preload data refers to the pressure data collected by the pressure sensor when the tie rod nut and hydraulic end are properly connected and the fracturing pump is operating normally. A lookup table storing preload data and initial preload data provides a one-to-one correspondence between the preload data and the initial preload data. Since different tie rods and tie rod nuts correspond to different pressures under normal connection conditions, this lookup table records the initial preload data corresponding to the current connection state. If the preload data is within a reasonable range, the corresponding initial preload data is retrieved from the lookup table; otherwise, an alarm is triggered based on the magnitude or rate of change of the preload, indicating the status of the tie rod nut.

[0070] Step S4023: Determine the state of the tie rod nut based on the initial preload data.

[0071] After determining the initial preload data, the state of the tie rod nut can be determined by using the numerical fluctuation range of the initial preload data.

[0072] In this embodiment, a pressure sensor monitors the pressure data between the tie rod nut and the hydraulic end as preload data. The preload data is verified within a reasonable range, and an initial preload data corresponding to a preload within this range is determined. Based on this initial preload data, the state of the tie rod nut is more accurately detected. Simultaneously, an alarm is triggered for preload data that does not conform to the reasonable range, thereby promptly detecting and addressing any abnormalities in the tie rod nut's preload.

[0073] In one possible implementation, step S4022 above includes:

[0074] Step a1: If the preload data is less than or equal to the first preset threshold, then the alarm rod nut is in a loose state.

[0075] Step a2: If the rate of change of the preload data is greater than or equal to the second preset threshold, then the alarm rod nut is in an overload state.

[0076] In this embodiment, the first preset threshold is a value used to measure excessively low preload data. The second preset threshold is a value used to measure excessively large changes in preload data. If the preload data is less than the first preset threshold, it indicates that the preload data is very small, meaning there is a very weak or non-existent force interaction between the tie rod and the tie rod nut, in which case the tie rod nut is in a loose state. Furthermore, the tie rod is in a broken state. If the rate of change of the preload data is greater than or equal to the second preset threshold, it indicates that the preload data has increased rapidly within a unit of time, in which case the tie rod nut is in an overload state. Furthermore, the tie rod is in an overload state. Thus, based on the analysis of the preload data, the loose or overloaded state of the tie rod nut, and the broken or overloaded state of the tie rod are determined.

[0077] In one possible implementation, step S4023 above includes:

[0078] Step b1: Determine the target preload fluctuation range corresponding to the initial preload data from the lookup table of initial preload data and preload fluctuation range. The preload fluctuation range indicates the pressure range that the tie rod nut can withstand, and the lookup table of initial preload data and preload fluctuation range indicates the one-to-one correspondence between multiple initial preload data and multiple preload fluctuation ranges.

[0079] Step b2: Determine whether the preload data is within the target preload fluctuation range.

[0080] Step b3: If yes, the tie rod nut is in normal condition; otherwise, determine the condition of the tie rod nut based on the rate of change of the preload data.

[0081] In this embodiment, the lookup table for initial preload data and preload fluctuation range indicates a one-to-one correspondence between multiple initial preload data and multiple preload fluctuation ranges. The preload fluctuation range characterizes the pressure range that the tie rod nut can withstand. The target preload fluctuation range corresponding to the initial preload data is determined from the lookup table for initial preload data and preload fluctuation range.

[0082] The system determines whether the current preload data falls within the target preload fluctuation range. If so, the preload is within the allowable fluctuation range, and the tie rod nut is in a normal state. Otherwise, the state of the tie rod nut is further determined by analyzing the change in preload data. This further assessment of the preload data improves the accuracy of using preload analysis to determine the state of the tie rod nut.

[0083] In one possible implementation, step b3 above includes:

[0084] Step c1: If the rate of change of the preload data is less than the third preset threshold, the alarm tie rod nut is in a first-level abnormal state.

[0085] Step c2: If the rate of change of the preload data is greater than or equal to the fourth preset threshold, the alarm tie rod nut is in a level two abnormal state. The severity of level two abnormality is higher than that of level one abnormality.

[0086] In this embodiment, both the third preset threshold and the fourth preset threshold are values ​​used to measure the rate of change of preload data, with the third preset threshold being less than the fourth preset threshold. If the rate of change of preload data is less than the third preset threshold, it indicates that the preload data is fluctuating abnormally, and the rate of change is small; in this case, the alarm tie rod nut is in a first-level abnormal state. If the rate of change of preload data is greater than or equal to the fourth preset threshold, it indicates that the preload data is fluctuating abnormally, and the rate of change is large; in this case, the alarm tie rod nut is in a second-level abnormal state, where the severity of the second-level abnormality is higher than that of the first-level abnormality.

[0087] In one possible implementation, the following steps are included before step b1:

[0088] Step d1: Collect the preload data of the tie rod nut under normal working conditions and its change curve over time.

[0089] Step d2: Determine the range of preload fluctuation based on the change curve.

[0090] In this embodiment, before determining the target preload fluctuation range corresponding to the initial preload data from the lookup table of initial preload data and preload fluctuation range, it is necessary to collect the change curve of the preload data over time for the tie rod nut under normal working conditions. Based on this change curve, the preload fluctuation range is determined. For example, the maximum and minimum values ​​of this change curve are used as the upper and lower limits of the preload fluctuation range. This provides the preload fluctuation range for constructing the lookup table of initial preload data and preload fluctuation range.

[0091] In one possible implementation, after determining that the tie rod nut is in any of the following states: overload, loose, first-level abnormal, or second-level abnormal, the method further includes: controlling the fracturing pump to stop working and checking for faults. This ensures that when the tie rod nut is found to be in an abnormal working state, the fracturing pump is stopped promptly to prevent further damage, the cause of the fault is investigated, and repair methods are provided.

[0092] Figure 5 This is a schematic flowchart illustrating a method for controlling a fracturing pump based on the condition monitoring data of the fracturing pump tie rod nut, according to an embodiment of this application. Figure 5As shown, the preload data between the tie rod nut and the hydraulic end, collected by the pressure sensor, is used as input to determine if the preload is normal. If it is abnormal, for example, if the data is significantly too high or too low, falling outside the normal range, then the initial preload is considered abnormal. When the initial preload is 0, it indicates that there is no longer any interaction between the tie rod nut and the tie rod, i.e., they have separated, so the tie rod is considered broken, and the fracturing pump is immediately shut down. When the preload suddenly increases, it indicates that the tie rod nut is under pressure overload, possibly indicating a plunger cylinder malfunction, so the fracturing pump is immediately shut down. If the preload is normal, this preload is used as the initial preload, and it is determined whether the initial preload is within a preset threshold. If it is, the tie rod is normal. Otherwise, if there is abnormal fluctuation in the preload, the fracturing pump is shut down and the cause of the fault is investigated. This overcomes the shortcomings in tie rod fault detection, monitors the status of the fracturing pump tie rod in real time, and promptly detects tie rod faults. Furthermore, tie rod malfunctions can be diagnosed more accurately by observing changes in preload leading to pressure changes, which in turn cause changes in electrical signals, thus determining the tie rod's health status.

[0093] Figure 6 This is a schematic diagram illustrating the configuration of a condition monitoring system for a fracturing pump tie rod nut according to an embodiment of this application. Figure 6 As shown, the condition monitoring system for the fracturing pump tie rod nut includes a data detection module and a data processing module. The data detection module includes a stress sensor and a data acquisition unit, while the data processing module includes a host computer for data analysis. In the data detection module, the stress sensor collects pressure data between the tie rod nut and the hydraulic end, which is then transmitted to the host computer in the data processing module for analysis of the tie rod nut's condition as reflected by the pressure data. This condition monitoring system acquires the tie rod nut preload data through the pressure sensor and transmits the collected information to the host computer for analysis and processing. Data display and alarms are then displayed on the platform, providing timely and accurate feedback to operators to prevent accidents and ensure the safe and reliable operation of the fracturing pump.

[0094] This application also provides a condition monitoring device for the tie rod nut of a fracturing pump. This device is used to implement the above embodiments and preferred embodiments, and details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0095] This application provides a condition monitoring device for the tie rod nut of a fracturing pump. The fracturing pump includes a power end, a hydraulic end, a tie rod, a tie rod nut, a gasket, and a pressure sensor. The pressure sensor is disposed on the outer annular surface of the gasket, which is located between the tie rod nut and the hydraulic end. Figure 7 As shown, it includes:

[0096] The acquisition module 701 is used to acquire the preload data between the tie rod nut and the hydraulic end through a pressure sensor;

[0097] The determination module 702 is used to determine the state of the tie rod nut based on the preload data. The state is used for maintenance of the tie rod nut and tie rod.

[0098] In one possible implementation, the determining module 702 includes:

[0099] The first determining unit is used to determine whether the preload data is within a reasonable range.

[0100] The judgment unit is used to, if the condition is met, search for the corresponding initial preload data in a lookup table of preload data and initial preload data; otherwise, it issues an alarm based on the preload data regarding the status of the tie rod nut. The lookup table stores preload data that corresponds one-to-one with the initial preload data. The initial preload data indicates that the tie rod nut and the hydraulic end are properly connected.

[0101] The second determining unit is used to determine the state of the tie rod nut based on the initial preload data.

[0102] In one possible implementation, the decision unit includes:

[0103] The loosening alarm subunit is used to alarm that the tie rod nut is loose if the preload data is less than or equal to a first preset threshold.

[0104] The overload alarm subunit is used to alarm the tie rod nut if the rate of change of the preload data is greater than or equal to a second preset threshold.

[0105] The second determining unit includes:

[0106] The third determining subunit is used to determine the target preload fluctuation range corresponding to the initial preload data from the lookup table of initial preload data and preload fluctuation range. The preload fluctuation range indicates the pressure range that the tie rod nut can withstand, and the lookup table of initial preload data and preload fluctuation range indicates the one-to-one correspondence between multiple initial preload data and multiple preload fluctuation ranges.

[0107] The first judgment subunit is used to determine whether the preload data is within the target preload fluctuation range;

[0108] The fourth determination subunit is used to determine the state of the tie rod nut if the condition is met, otherwise, the state of the tie rod nut is determined based on the rate of change of the preload data.

[0109] In one possible implementation, the fourth determining subunit is used for:

[0110] If the rate of change of the preload data is less than the third preset threshold, the alarm tie rod nut is in a first-level abnormal state.

[0111] If the rate of change of the preload data is greater than or equal to the fourth preset threshold, the alarm tie rod nut is in a level two abnormal state, and the severity of level two abnormality is higher than that of level one abnormality.

[0112] In one possible implementation, before determining the target preload fluctuation range corresponding to the initial preload data from a lookup table of initial preload data and preload fluctuation range, the third determining subunit is further configured to:

[0113] The preload data of the tie rod nut under normal working conditions is collected as a function of time.

[0114] Determine the range of preload fluctuation based on the variation curve.

[0115] In one possible implementation, after determining that the state of the tie rod nut is any one of the following: overload state, loose state, first-level abnormal state, or second-level abnormal state, the fourth determining subunit is further used for:

[0116] Stop the fracturing pump and check for malfunctions.

[0117] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0118] The fracturing pump tie rod nut status monitoring device in this application embodiment is presented in the form of a functional unit. Here, a unit refers to an application-specific integrated circuit (ASIC), a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0119] This application also provides a computer device having the above-described features. Figure 8 The device shown is a condition monitoring device for the tie rod nut of the fracturing pump.

[0120] Please see Figure 8 , Figure 8 This is a schematic diagram of the structure of a computer device provided in an optional embodiment of this application, such as... Figure 8As shown, the computer device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 8 Take a processor 10 as an example.

[0121] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GPA), or any combination thereof.

[0122] The memory 20 stores instructions executable by at least one processor 10 to cause at least one processor 10 to perform the method shown in the above embodiments.

[0123] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0124] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0125] The computer device also includes an input device 30 and an output device 40. The processor 10, memory 20, input device 30, and output device 40 can be connected via a bus or other means. Figure 8 Taking the example of a connection between China and Israel via a bus.

[0126] Input device 30 can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the computer device, such as a touchscreen, keypad, mouse, trackpad, touchpad, joystick, one or more mouse buttons, trackball, joystick, etc. Output device 40 may include display devices, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors). The aforementioned display devices include, but are not limited to, liquid crystal displays, light-emitting diodes, displays, and plasma displays. In some alternative embodiments, the display device may be a touchscreen.

[0127] This application also provides a computer-readable storage medium. The methods described in this application can be implemented in hardware or firmware, or implemented as recordable on a storage medium, or implemented as computer code downloaded over a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and subsequently stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code. When the software or computer code is accessed and executed by the computer, processor, or hardware, the methods shown in the above embodiments are implemented.

[0128] A portion of this application can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to this application through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions, or the computer compiling the instructions and then executing the corresponding compiled program, or the computer reading and executing the instructions, or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0129] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A method for monitoring the condition of a fracturing pump tie rod nut, characterized in that, The fracturing pump includes a power end, a hydraulic end, a tie rod, a tie rod nut, a gasket, and a pressure sensor. The pressure sensor is disposed on the outer annular surface of the gasket, and the gasket is located between the tie rod nut and the hydraulic end. The method includes: The pressure sensor is used to obtain the preload force data between the tie rod nut and the hydraulic end; Based on the preload data, the state of the tie rod nut is determined, and this state is used for maintenance of the tie rod nut and the tie rod.

2. The method according to claim 1, characterized in that, Determining the state of the tie rod nut based on the preload data includes: Determine whether the preload data is within a reasonable range; If so, the initial preload data corresponding to the preload data is found in the lookup table of preload data and initial preload data; otherwise, an alarm is issued for the status of the tie rod nut based on the preload data. The preload data stored in the lookup table of preload data and initial preload data corresponds one-to-one with the initial preload data, and the initial preload data indicates that the tie rod nut and the hydraulic end are normally connected. The state of the tie rod nut is determined based on the initial preload data.

3. The method according to claim 2, characterized in that, The step of issuing an alarm based on the preload data regarding the status of the tie rod nut includes: If the preload data is less than or equal to the first preset threshold, an alarm will be issued indicating that the tie rod nut is loose. If the rate of change of the preload data is greater than or equal to the second preset threshold, an alarm will be issued indicating that the tie rod nut is in an overload state.

4. The method according to claim 3, characterized in that, Determining the state of the tie rod nut based on the initial preload data includes: The target preload fluctuation range corresponding to the initial preload data is determined from the lookup table of initial preload data and preload fluctuation range, wherein the preload fluctuation range indicates the pressure range that the tie rod nut can withstand, and the lookup table of initial preload data and preload fluctuation range indicates a one-to-one correspondence between multiple initial preload data and multiple preload fluctuation ranges; Determine whether the preload data is within the target preload fluctuation range; If so, the tie rod nut is in a normal state; otherwise, the state of the tie rod nut is determined based on the rate of change of the preload data.

5. The method according to claim 4, characterized in that, Determining the state of the tie rod nut based on the rate of change of the preload data includes: If the rate of change of the preload data is less than the third preset threshold, an alarm will be issued that the tie rod nut is in a first-level abnormal state. If the rate of change of the preload data is greater than or equal to the fourth preset threshold, an alarm is triggered that the tie rod nut is in a level two abnormal state, and the severity of the level two abnormality is higher than that of the level one abnormality.

6. The method according to claim 2, characterized in that, Before determining the target preload fluctuation range corresponding to the initial preload data from the lookup table of initial preload data and preload fluctuation range, the process also includes: The curve of the change of the initial preload force data over time was collected when the tie rod nut was in normal working condition. The range of preload fluctuation is determined based on the change curve.

7. The method according to claim 5, characterized in that, After determining that the state of the tie rod nut is any one of the following states: overload state, loose state, first-level abnormal state, and second-level abnormal state, the process further includes: Control the fracturing pump to stop working and check for faults.

8. A condition monitoring device for a fracturing pump tie rod nut, characterized in that, The fracturing pump includes a power end, a hydraulic end, a tie rod, a tie rod nut, a gasket, and a pressure sensor. The pressure sensor is disposed on the outer annular surface of the gasket, and the gasket is located between the tie rod nut and the hydraulic end. The device includes: The acquisition module is used to acquire the preload data between the tie rod nut and the hydraulic end through the pressure sensor; The determination module is used to determine the state of the tie rod nut based on the preload data, and the state is used for maintenance of the tie rod nut and the tie rod.

9. A computer device, characterized in that, include: A memory and a processor are interconnected, the memory stores computer instructions, and the processor executes the computer instructions to perform the fracturing pump tie rod nut condition monitoring method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to execute the condition monitoring method for the fracturing pump tie rod nut as described in any one of claims 1 to 7.

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