Fault diagnosis method of two-stage compression diaphragm compressor and electronic equipment

Abstract

The invention relates to a fault diagnosis method for a two-stage compression diaphragm compressor and electronic equipment. The method comprises the steps that operation parameters of the two-stage compression diaphragm compressor are obtained; and on the basis of the operation parameters, the fault condition of a target air inlet valve in the two-stage compression diaphragm type compressor is determined. By adopting the method disclosed by the invention, online fault diagnosis can be performed on the air inlet valve in the two-stage compression diaphragm type compressor, so that the disassembly process of the cylinder body of the compressor is avoided, the operation process is simplified, and meanwhile, the labor cost is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of compressor technology, and more specifically, to a fault diagnosis method and electronic equipment for a two-stage diaphragm compressor. Background Technology

[0002] Diaphragm compressors are a type of reciprocating compressor with a special structure. They have a large compression ratio, good sealing performance, and the compressed gas is not contaminated by lubricating oil or other impurities. They are widely used for compressing and transporting various high-purity, rare and precious, flammable and explosive, toxic and harmful, corrosive and high-pressure gases.

[0003] A diaphragm compressor uses a reciprocating piston to drive hydraulic fluid, causing the diaphragm to vibrate reciprocally. With the help of the inlet and outlet valves, each vibration of the diaphragm completes one intake and exhaust cycle. Reliability and safety are crucial in the application of diaphragm compressors. If a component fails during operation, the entire process will inevitably be affected, potentially leading to a safety accident. The inlet valve of a diaphragm compressor, as a key component for air intake, has a significant impact on compressor performance. Furthermore, because the inlet valve is subjected to various destructive forces during operation, including tensile force, compressive force, impact force, torque, wear, and extreme high or low temperatures, it is prone to failure, thus affecting the normal operation of the diaphragm compressor. Therefore, fault diagnosis of the diaphragm compressor's inlet valve is necessary.

[0004] In related technologies, diagnosing faults in the intake valve requires disassembling the cylinder head and cylinder cover, a complex process that impacts production, especially for two-stage compression diaphragm compressors. Summary of the Invention

[0005] The purpose of this disclosure is to provide a fault diagnosis method, device, storage medium, and electronic equipment for a two-stage compression diaphragm compressor, which can identify intake valve faults online based on the operating parameters of the two-stage compression diaphragm compressor, thereby avoiding the compressor cylinder disassembly process, simplifying the operation process, and reducing labor costs.

[0006] The first part of this disclosure provides a fault diagnosis method for a two-stage compression diaphragm compressor, the method comprising: Obtain the operating parameters of the two-stage diaphragm compressor; Based on the operating parameters, the fault status of the target intake valve in the two-stage compression diaphragm compressor is determined.

[0007] Optionally, the operating parameters include first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure. Determining the fault status of the target intake valve in the two-stage compression diaphragm compressor based on these operating parameters includes: The fault status of the first-stage intake valve in the two-stage compression diaphragm compressor is determined based on one or more of the first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure.

[0008] Optionally, determining the fault status of the first-stage intake valve in the two-stage compression diaphragm compressor based on one or more of the first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure includes: If the temperature of the first-stage intake pipe increases, the first-stage exhaust flow rate decreases, the pulse peak value corresponding to the pressure of the first-stage intake pipe increases, and the pressure of the first-stage outlet buffer tank decreases, it is determined that the first-stage intake valve has a fault that prevents it from closing.

[0009] Optionally, determining the fault status of the first-stage intake valve in the two-stage compression diaphragm compressor based on one or more of the first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure includes: If the pressure in the first-stage outlet buffer tank decreases, the first-stage exhaust flow rate decreases, the second-stage exhaust flow rate decreases after the first-stage exhaust flow rate decreases, and the pressure on the gas side of the first-stage cylinder decreases when the diaphragm of the first-stage cylinder is at the bottom dead center, it is determined that the first-stage intake valve has a fault that prevents it from opening.

[0010] Optionally, determining the fault status of the first-stage intake valve in the two-stage compression diaphragm compressor based on one or more of the first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure includes: When the pressure in the primary outlet buffer tank decreases, it is determined that the primary intake valve has a fault of insufficient opening.

[0011] Optionally, the operating parameters include the first-stage outlet buffer tank pressure, the second-stage intake pipe temperature, the second-stage exhaust flow rate, and the second-stage cylinder block gas-side pressure. Determining the fault status of the target intake valve in the two-stage diaphragm compressor based on these operating parameters includes: The fault status of the second-stage intake valve in the two-stage compression diaphragm compressor is determined based on one or more of the pressure of the first-stage outlet buffer tank, the temperature of the second-stage intake pipe, the second-stage exhaust flow rate, and the air-side pressure of the second-stage cylinder.

[0012] Optionally, determining the fault status of the second-stage intake valve in the two-stage compression diaphragm compressor based on one or more of the first-stage outlet buffer tank pressure, the second-stage intake pipe temperature, the second-stage exhaust flow rate, and the second-stage cylinder block gas-side pressure includes: If the pulse peak value corresponding to the pressure of the primary outlet buffer tank increases, the temperature of the secondary intake pipe rises, the secondary exhaust flow rate decreases, and the pressure of the primary outlet buffer tank increases, it is determined that the secondary intake valve has a fault that prevents it from closing.

[0013] Optionally, determining the fault status of the second-stage intake valve in the two-stage compression diaphragm compressor based on one or more of the first-stage outlet buffer tank pressure, the second-stage intake pipe temperature, the second-stage exhaust flow rate, and the second-stage cylinder block gas-side pressure includes: If the secondary exhaust flow rate decreases, the pressure of the primary outlet buffer tank increases, and the air-side pressure of the secondary cylinder decreases when the diaphragm of the secondary cylinder is at the bottom dead center, it is determined that the secondary intake valve has a fault that prevents it from opening.

[0014] Optionally, determining the fault status of the second-stage intake valve in the two-stage compression diaphragm compressor based on one or more of the first-stage outlet buffer tank pressure, the second-stage intake pipe temperature, the second-stage exhaust flow rate, and the second-stage cylinder block gas-side pressure includes: When the pressure in the primary outlet buffer tank increases, it is determined that the secondary intake valve has a fault of insufficient opening.

[0015] The second part of this disclosure provides a fault diagnosis device for a two-stage compression diaphragm compressor, the device comprising: The acquisition module is used to acquire the operating parameters of the two-stage compression diaphragm compressor; The determination module is used to determine the fault status of the target intake valve in the two-stage compression diaphragm compressor based on the operating parameters.

[0016] Optionally, the operating parameters include first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure, and the determining module includes: The first determining submodule is used to determine the fault status of the first-stage intake valve in the two-stage compression diaphragm compressor based on one or more of the first-stage intake pipe temperature, first-stage intake pipe pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure.

[0017] Optionally, the first determining submodule is further configured to determine that the first-stage intake valve has a failure to close when the temperature of the first-stage intake pipe increases, the first-stage exhaust flow rate decreases, the pulse peak value corresponding to the pressure of the first-stage intake pipe increases, and the pressure of the first-stage outlet buffer tank decreases.

[0018] Optionally, the first determining submodule is further configured to determine that the first-stage intake valve has a failure to open when the pressure of the first-stage outlet buffer tank decreases, the first-stage exhaust flow rate decreases, the second-stage exhaust flow rate is delayed after the decrease in the first-stage exhaust flow rate, and the pressure on the gas side of the first-stage cylinder block decreases when the diaphragm of the first-stage cylinder block is at the bottom dead center position.

[0019] Optionally, the first determining submodule is also used to determine that the first-stage intake valve has a small opening when the pressure of the first-stage outlet buffer tank decreases.

[0020] Optionally, the operating parameters include the first-stage outlet buffer tank pressure, the second-stage intake manifold temperature, the second-stage exhaust flow rate, and the second-stage cylinder block gas-side pressure. The determining module further includes: The second determining submodule is used to determine the fault status of the secondary intake valve in the two-stage compression diaphragm compressor based on one or more of the primary outlet buffer tank pressure, the secondary intake pipe temperature, the secondary exhaust flow rate, and the secondary cylinder gas-side pressure.

[0021] Optionally, the second determining submodule is further configured to determine that the secondary intake valve has a failure to close when the pulse peak corresponding to the pressure of the primary outlet buffer tank increases, the temperature of the secondary intake pipe rises, the secondary exhaust flow rate decreases, and the pressure of the primary outlet buffer tank increases.

[0022] Optionally, the second determining submodule is further configured to determine that the secondary intake valve has a failure to open when the secondary exhaust flow rate decreases, the pressure of the primary outlet buffer tank increases, and the air-side pressure of the secondary cylinder decreases when the secondary cylinder diaphragm is at the bottom dead center position.

[0023] Optionally, the second determining submodule is also used to determine that the secondary intake valve has a small opening when the pressure of the primary outlet buffer tank increases.

[0024] In a third part of the embodiments of this disclosure, this disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the steps of the method described in any one of the first aspects.

[0025] In the fourth part of the embodiments of this disclosure, this disclosure provides an electronic device, including: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method of any one of the first aspects.

[0026] By adopting the above technical solution, at least the following beneficial technical effects can be achieved: After obtaining the operating parameters of the two-stage diaphragm compressor, the fault status of the target intake valve in the two-stage diaphragm compressor can be determined based on the operating parameters, so as to complete the online fault diagnosis of the intake valve in the two-stage diaphragm compressor, thereby avoiding the compressor cylinder disassembly process, simplifying the operation process, and reducing labor costs.

[0027] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a two-stage compression diaphragm compressor according to an exemplary embodiment of the present disclosure; Figure 2 This is a flowchart illustrating a fault diagnosis method for a two-stage compression diaphragm compressor according to an exemplary embodiment of the present disclosure; Figure 3 This is a block diagram illustrating a fault diagnosis device for a two-stage diaphragm compressor according to an exemplary embodiment of the present disclosure; Figure 4 This is a block diagram illustrating an electronic device according to an exemplary embodiment of the present disclosure.

[0029] Explanation of reference numerals in the attached figures: 1-First-stage intake valve, 2-First-stage cylinder block, 3-First-stage exhaust valve, 4-First-stage cylinder block cavity air side, 5-Second-stage cylinder block, 6-Second-stage exhaust valve, 7-Second-stage intake valve, 8-Second-stage cylinder block cavity air side. Detailed Implementation

[0030] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0031] Below, let's first combine Figure 1 The two-stage compression diaphragm compressor according to embodiments of this disclosure will be described. For example... Figure 1As shown, in some embodiments, the two-stage compression diaphragm compressor includes a first-stage intake valve 1, a first-stage cylinder 2, a first-stage exhaust valve 3, a first-stage cylinder cavity air side 4, a second-stage cylinder 5, a second-stage exhaust valve 6, a second-stage intake valve 7, and a second-stage cylinder cavity air side 8.

[0032] A remote thermometer and a remote pressure gauge can be installed on the first-stage cylinder block 2 at the inlet line of the first-stage intake valve 1 to monitor the first-stage intake pipe temperature T1 and pressure P11, respectively; a remote flow meter can be installed on the first-stage exhaust valve 3 line to monitor the first-stage exhaust flow rate Q2; a remote pressure gauge can be installed on the gas side 4 of the first-stage cylinder block cavity to monitor the first-stage cylinder block gas side pressure P9; a remote pressure gauge can be installed on the first-stage outlet buffer tank between the exhaust port of the first-stage cylinder block 2 and the intake port of the second-stage cylinder block 5 to monitor the first-stage outlet buffer tank pressure P3; a remote thermometer can be installed on the second-stage cylinder block 5 at the inlet line of the second-stage intake valve 7 to monitor the second-stage intake pipe temperature T5; a remote flow meter can be installed on the second-stage exhaust valve 6 line to monitor the second-stage exhaust flow rate Q6; and a remote pressure gauge can be installed on the gas side 8 of the second-stage cylinder block cavity to monitor the second-stage cylinder block gas side pressure P10.

[0033] By monitoring the operating parameters such as the first-stage intake manifold temperature T1, the first-stage exhaust flow rate Q2, the first-stage outlet buffer tank pressure P3, the second-stage intake manifold temperature T5, the second-stage exhaust flow rate Q6, the first-stage cylinder block air-side pressure P9, the second-stage cylinder block air-side pressure P10, and the first-stage intake manifold pressure P11, fault identification and diagnosis of the first-stage intake valve 1 and the second-stage intake valve 7 can be performed.

[0034] The following is for reference. Figure 1 as well as Figure 2 The fault diagnosis method for a two-stage compression diaphragm compressor according to embodiments of the present disclosure will be described.

[0035] Figure 2 This is a flowchart illustrating a fault diagnosis method for a two-stage diaphragm compressor according to an exemplary embodiment. This method can be applied to electronic devices, such as... Figure 2 As shown, the fault diagnosis method for this two-stage diaphragm compressor may include the following steps: S201, obtain the operating parameters of the two-stage compression diaphragm compressor.

[0036] S202, based on operating parameters, determine the fault status of the target intake valve in a two-stage compression diaphragm compressor.

[0037] Using the above method, after obtaining the operating parameters of the two-stage diaphragm compressor, the fault condition of the target intake valve in the two-stage diaphragm compressor can be determined based on the operating parameters, so as to complete the online fault diagnosis of the intake valve in the two-stage diaphragm compressor, thereby avoiding the compressor cylinder disassembly process, simplifying the operation process, and reducing labor costs.

[0038] Combination Figure 1 The schematic diagram of the two-stage compression diaphragm compressor shown is provided. The two-stage compression diaphragm compressor includes a first-stage intake valve and a second-stage intake valve. Therefore, the target intake valve can be either the first-stage intake valve or the second-stage intake valve. Thus, the method of this embodiment can diagnose faults in the first-stage and second-stage intake valves of the two-stage compression diaphragm compressor.

[0039] In some implementations, the first-stage intake valve can be fault-diagnosed using first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure. Therefore, in some implementations, the operating parameters may include first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure. In this case, step S202, based on the operating parameters, determining the fault condition of the target intake valve in the two-stage compression diaphragm compressor, may include the following steps: Based on one or more of the following parameters: first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure, determine the fault condition of the first-stage intake valve in a two-stage compression diaphragm compressor.

[0040] In this embodiment of the disclosure, different types of fault diagnosis can be performed on the first-stage intake valve according to different operating parameters.

[0041] In some implementations, when the temperature of the first-stage intake manifold increases, the first-stage exhaust flow rate decreases, the pulse peak value corresponding to the pressure of the first-stage intake manifold increases, and the pressure of the first-stage outlet buffer tank decreases, it is determined that the first-stage intake valve has a failure to close.

[0042] In this embodiment of the disclosure, if the following phenomena occur simultaneously: the temperature of the first-stage intake pipe increases, the flow rate of the first-stage exhaust pipe decreases, the pulse peak value corresponding to the pressure of the first-stage intake pipe increases, and the pressure of the first-stage outlet buffer tank decreases, then it can be determined that the first-stage intake valve has a fault that prevents it from closing.

[0043] In some implementations, if the pressure in the first-stage outlet buffer tank decreases, the first-stage exhaust flow rate decreases, the second-stage exhaust flow rate decreases after the first-stage exhaust flow rate decreases, and the pressure on the gas side of the first-stage cylinder decreases when the diaphragm of the first-stage cylinder is at the bottom dead center, it is determined that the first-stage intake valve has a fault that prevents it from opening.

[0044] In this embodiment of the disclosure, if the following phenomena occur simultaneously: the pressure of the first-stage outlet buffer tank decreases, the first-stage exhaust flow rate decreases, the second-stage exhaust flow rate is delayed compared to the decrease in the first-stage exhaust flow rate, and the pressure on the gas side of the first-stage cylinder decreases when the diaphragm of the first-stage cylinder is at the bottom dead center position, then it can be determined that the first-stage intake valve has a fault that prevents it from opening.

[0045] In some implementations, a fault is identified in the first-stage inlet valve that has a small opening when the pressure in the first-stage outlet buffer tank decreases.

[0046] In this embodiment of the disclosure, if only the pressure of the first-stage outlet buffer tank decreases, it can be determined that the first-stage intake valve has a fault of small opening.

[0047] In some embodiments, the secondary intake valve can be fault-diagnosed using the primary outlet buffer tank pressure, secondary intake pipe temperature, secondary exhaust flow rate, and secondary cylinder block gas-side pressure. Therefore, in some embodiments, the operating parameters may include the primary outlet buffer tank pressure, secondary intake pipe temperature, secondary exhaust flow rate, and secondary cylinder block gas-side pressure. In this case, step S202, based on the operating parameters, determining the fault condition of the target intake valve in the two-stage compression diaphragm compressor, may include the following steps: Based on one or more of the following factors: primary outlet buffer tank pressure, secondary intake pipe temperature, secondary exhaust flow rate, and secondary cylinder block gas-side pressure, determine the fault condition of the secondary intake valve in a two-stage compression diaphragm compressor.

[0048] In this embodiment of the disclosure, different types of fault diagnosis can be performed on the secondary intake valve according to different operating parameters.

[0049] In some implementations, if the pulse peak corresponding to the pressure of the primary outlet buffer tank increases, the temperature of the secondary intake pipe rises, the secondary exhaust flow rate decreases, and the pressure of the primary outlet buffer tank increases, it is determined that the secondary intake valve has a fault that prevents it from closing.

[0050] In this embodiment of the disclosure, if the pulse peak corresponding to the pressure of the primary outlet buffer tank increases, the temperature of the secondary intake pipe rises, the secondary exhaust flow rate decreases, and the pressure of the primary outlet buffer tank increases simultaneously, it can be determined that the secondary intake valve has a fault that prevents it from closing.

[0051] In some implementations, a failure to open the secondary intake valve is determined when the secondary exhaust flow rate decreases, the pressure in the primary outlet buffer tank increases, and the secondary cylinder diaphragm is at bottom dead center and the secondary cylinder air-side pressure decreases.

[0052] In this embodiment of the disclosure, if simultaneously the secondary exhaust flow rate decreases, the primary outlet buffer tank pressure increases, and the secondary cylinder diaphragm is at the bottom dead center position, the secondary cylinder air-side pressure decreases, then it can be determined that the secondary intake valve has a fault that prevents it from opening.

[0053] In some implementations, a fault is identified in the secondary intake valve that has a small opening when the pressure in the primary outlet buffer tank increases.

[0054] In this embodiment of the disclosure, if only the pressure of the primary outlet buffer tank increases, it can be determined that the secondary intake valve has a fault of small opening.

[0055] In some implementations, considering that the temperature of the primary intake manifold and the temperature of the secondary intake manifold do not change much with the compressor's working cycle under normal operating conditions, the temperature of the primary intake manifold can be compared with the standard temperature value of the primary intake manifold under normal operating conditions to determine whether the temperature of the primary intake manifold has increased or decreased. Similarly, the temperature of the secondary intake manifold can be compared with the standard temperature value of the secondary intake manifold under normal operating conditions to determine whether the temperature of the secondary intake manifold has increased or decreased.

[0056] In some implementations, parameter curves corresponding to the first-stage exhaust flow rate, first-stage intake manifold pressure, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, first-stage cylinder block air-side pressure, second-stage exhaust flow rate, and second-stage cylinder block air-side pressure can be plotted based on real-time operating parameters. Then, by comparing the real-time parameter curves with the standard parameter curves corresponding to each parameter under normal operating conditions, the changes in these operating parameters can be accurately determined.

[0057] In some implementations, an increase or decrease of a certain operating parameter relative to its standard value is required to reach a certain magnitude before the corresponding increase or decrease condition is determined to be met.

[0058] In some implementations, the two-stage compression diaphragm compressor can be a two-stage diaphragm hydrogen compressor, and the compressor outlet pressure range can be 1~250MPa.

[0059] Based on the same concept, this disclosure also provides a fault diagnosis device for a two-stage compression diaphragm compressor, which can be incorporated into or entirely of an electronic device through software, hardware, or a combination of both. (See also...) Figure 3 The fault diagnosis device 300 for the two-stage diaphragm compressor may include: The acquisition module 310 is used to acquire the operating parameters of the two-stage compression diaphragm compressor; The determination module 320 is used to determine the fault status of the target intake valve in the two-stage compression diaphragm compressor based on the operating parameters.

[0060] Optionally, the operating parameters include first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block air-side pressure. The determining module 320 includes: The first determining submodule is used to determine the fault status of the first-stage intake valve in the two-stage compression diaphragm compressor based on one or more of the first-stage intake pipe temperature, first-stage intake pipe pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure.

[0061] Optionally, the first determining submodule is further configured to determine that the first-stage intake valve has a failure to close when the temperature of the first-stage intake pipe increases, the first-stage exhaust flow rate decreases, the pulse peak value corresponding to the pressure of the first-stage intake pipe increases, and the pressure of the first-stage outlet buffer tank decreases.

[0062] Optionally, the first determining submodule is further configured to determine that the first-stage intake valve has a failure to open when the pressure of the first-stage outlet buffer tank decreases, the first-stage exhaust flow rate decreases, the second-stage exhaust flow rate is delayed after the decrease in the first-stage exhaust flow rate, and the pressure on the gas side of the first-stage cylinder block decreases when the diaphragm of the first-stage cylinder block is at the bottom dead center position.

[0063] Optionally, the first determining submodule is also used to determine that the first-stage intake valve has a small opening when the pressure of the first-stage outlet buffer tank decreases.

[0064] Optionally, the operating parameters include the primary outlet buffer tank pressure, the secondary intake manifold temperature, the secondary exhaust flow rate, and the secondary cylinder block gas-side pressure. The determining module 320 further includes: The second determining submodule is used to determine the fault status of the secondary intake valve in the two-stage compression diaphragm compressor based on one or more of the primary outlet buffer tank pressure, the secondary intake pipe temperature, the secondary exhaust flow rate, and the secondary cylinder gas-side pressure.

[0065] Optionally, the second determining submodule is further configured to determine that the secondary intake valve has a failure to close when the pulse peak corresponding to the pressure of the primary outlet buffer tank increases, the temperature of the secondary intake pipe rises, the secondary exhaust flow rate decreases, and the pressure of the primary outlet buffer tank increases.

[0066] Optionally, the second determining submodule is further configured to determine that the secondary intake valve has a failure to open when the secondary exhaust flow rate decreases, the pressure of the primary outlet buffer tank increases, and the air-side pressure of the secondary cylinder decreases when the secondary cylinder diaphragm is at the bottom dead center position.

[0067] Optionally, the second determining submodule is also used to determine that the secondary intake valve has a small opening when the pressure of the primary outlet buffer tank increases.

[0068] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0069] Based on the same inventive concept, this disclosure also provides an electronic device, including: A memory on which computer programs are stored; A processor is configured to execute the computer program in the memory to implement the steps of the fault diagnosis method for any of the two-stage diaphragm compressors described above.

[0070] In one possible manner, the block diagram of the electronic device can be as follows: Figure 4 As shown. (Refer to...) Figure 4 The electronic device 400 may include a processor 401 and a memory 402. The electronic device 400 may also include one or more of a multimedia component 403, an input / output (I / O) interface 404, and a communication component 405.

[0071] The processor 401 controls the overall operation of the electronic device 400 to complete all or part of the steps in the fault diagnosis method for the two-stage diaphragm compressor described above. The memory 402 stores various types of data to support the operation of the electronic device 400. This data may include, for example, instructions for any application or method operating on the electronic device 400, and application-related data. The memory 402 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The multimedia component 403 may include a screen and audio components. The screen may be, for example, a touchscreen, and the audio component is used for outputting and / or inputting audio signals. The input / output interface 404 provides an interface between the processor 401 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual or physical. The communication component 405 is used for wired or wireless communication between the electronic device 400 and other devices.

[0072] In an exemplary embodiment, the electronic device 400 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described fault diagnosis method for a two-stage compression diaphragm compressor.

[0073] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the fault diagnosis method for the two-stage diaphragm compressor described above. For example, the computer-readable storage medium may be the memory 402 including the program instructions described above, which may be executed by the processor 401 of the electronic device 400 to complete the fault diagnosis method for the two-stage diaphragm compressor described above.

[0074] In another exemplary embodiment, a computer program product is also provided, comprising a computer program executable by a programmable device, the computer program having a code portion for performing the above-described fault diagnosis method for a two-stage diaphragm compressor when executed by the programmable device.

[0075] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0076] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0077] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A fault diagnosis method for a two-stage compression diaphragm compressor, characterized in that, The method includes: Obtain the operating parameters of the two-stage diaphragm compressor; Based on the operating parameters, the fault status of the target intake valve in the two-stage compression diaphragm compressor is determined.

2. The method according to claim 1, characterized in that, The operating parameters include first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure. Based on these operating parameters, determining the fault status of the target intake valve in the two-stage diaphragm compressor includes: The fault status of the first-stage intake valve in the two-stage compression diaphragm compressor is determined based on one or more of the first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure.

3. The method according to claim 2, characterized in that, The determination of the fault status of the first-stage intake valve in the two-stage compression diaphragm compressor based on one or more of the following: first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure, includes: If the temperature of the first-stage intake pipe increases, the first-stage exhaust flow rate decreases, the pulse peak value corresponding to the pressure of the first-stage intake pipe increases, and the pressure of the first-stage outlet buffer tank decreases, it is determined that the first-stage intake valve has a fault that prevents it from closing.

4. The method according to claim 2, characterized in that, The determination of the fault status of the first-stage intake valve in the two-stage compression diaphragm compressor based on one or more of the following: first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure, includes: If the pressure in the first-stage outlet buffer tank decreases, the first-stage exhaust flow rate decreases, the second-stage exhaust flow rate decreases after the first-stage exhaust flow rate decreases, and the pressure on the gas side of the first-stage cylinder decreases when the diaphragm of the first-stage cylinder is at the bottom dead center, it is determined that the first-stage intake valve has a fault that prevents it from opening.

5. The method according to claim 2, characterized in that, The determination of the fault status of the first-stage intake valve in the two-stage compression diaphragm compressor based on one or more of the following: first-stage intake manifold temperature, first-stage intake manifold pressure, first-stage exhaust flow rate, first-stage outlet buffer tank pressure, second-stage exhaust flow rate, and first-stage cylinder block gas-side pressure, includes: When the pressure in the primary outlet buffer tank decreases, it is determined that the primary intake valve has a fault of insufficient opening.

6. The method according to claim 1, characterized in that, The operating parameters include the first-stage outlet buffer tank pressure, the second-stage intake pipe temperature, the second-stage exhaust flow rate, and the second-stage cylinder block gas-side pressure. Based on these operating parameters, determining the fault status of the target intake valve in the two-stage diaphragm compressor includes: The fault status of the second-stage intake valve in the two-stage compression diaphragm compressor is determined based on one or more of the pressure of the first-stage outlet buffer tank, the temperature of the second-stage intake pipe, the second-stage exhaust flow rate, and the air-side pressure of the second-stage cylinder.

7. The method according to claim 6, characterized in that, The determination of the fault status of the second-stage intake valve in the two-stage compression diaphragm compressor based on one or more of the following: the first-stage outlet buffer tank pressure, the second-stage intake pipe temperature, the second-stage exhaust flow rate, and the second-stage cylinder block gas-side pressure; includes: If the pulse peak value corresponding to the pressure of the primary outlet buffer tank increases, the temperature of the secondary intake pipe rises, the secondary exhaust flow rate decreases, and the pressure of the primary outlet buffer tank increases, it is determined that the secondary intake valve has a fault that prevents it from closing.

8. The method according to claim 6, characterized in that, The determination of the fault status of the second-stage intake valve in the two-stage compression diaphragm compressor based on one or more of the following: the first-stage outlet buffer tank pressure, the second-stage intake pipe temperature, the second-stage exhaust flow rate, and the second-stage cylinder block gas-side pressure; includes: If the secondary exhaust flow rate decreases, the pressure of the primary outlet buffer tank increases, and the air-side pressure of the secondary cylinder decreases when the diaphragm of the secondary cylinder is at the bottom dead center, it is determined that the secondary intake valve has a fault that prevents it from opening.

9. The method according to claim 6, characterized in that, The determination of the fault status of the second-stage intake valve in the two-stage compression diaphragm compressor based on one or more of the following: the first-stage outlet buffer tank pressure, the second-stage intake pipe temperature, the second-stage exhaust flow rate, and the second-stage cylinder block gas-side pressure; includes: When the pressure in the primary outlet buffer tank increases, it is determined that the secondary intake valve has a fault of insufficient opening.

10. An electronic device, characterized in that, include: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method according to any one of claims 1-9.

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