Natural gas explosion-proof motor with online detection function

Abstract

The invention discloses a natural gas explosion-proof motor with an online detection function, and relates to the field of natural gas explosion-proof motors. The natural gas explosion-proof motor with the online detection function comprises a motor body, a shell unit, a natural gas conveying unit, a first sealing unit and a second sealing unit. According to the natural gas explosion-proof motor with the on-line detection function, the on-line monitoring module monitors key parameters such as temperature, vibration and humidity in real time through various high-precision sensors arranged at the stator, the rotor and the bearing of the motor, and the health state of the motor is comprehensively covered by combining an insulation resistance on-line testing technology; the intelligent control module adopts a microprocessor to carry out real-time analysis on collected data, an audible and visual alarm provides local feedback, meanwhile, the data are uploaded to a cloud platform through a wireless communication module, the overall design adopts a modular structure, and installation, maintenance and replacement are convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas explosion-proof motors, and specifically to a natural gas explosion-proof motor with an online detection function. Background Art

[0002] In natural gas transportation and storage scenarios, explosion-proof motors are widely used to drive key equipment to ensure production safety and reliability.

[0003] However, due to the presence of flammable and explosive gases in the natural gas environment, the safety of the motor is of crucial importance. There are some problems in the existing explosion-proof motors during use: First, there is a lack of real-time health status monitoring means, which easily leads to accidents due to problems such as motor overheating, bearing wear, and coil aging; second, maintenance is usually mainly based on regular inspections, making it difficult to detect and warn of potential faults in a timely manner; third, most of the existing detection methods are offline, which is not suitable for the high requirements of continuous operation in the natural gas production process.

[0004] Based on this, the present application proposes a natural gas explosion-proof motor with an online detection function, which can real-time monitor key parameters during operation, early warn of faults, and at the same time meet the explosion-proof requirements. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a natural gas explosion-proof motor with an online detection function, which solves the problems of lack of real-time health status monitoring means, maintenance usually mainly based on regular inspections, making it difficult to detect and warn of potential faults in a timely manner, and most of the existing detection methods being offline, which is not suitable for the high requirements of continuous operation in the natural gas production process.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A natural gas explosion-proof motor with an online detection function, comprising:

[0007] A motor main body, on which an online monitoring module and an intelligent control module are provided;

[0008] A housing unit, which is installed on the outer wall of the motor main body, and the housing unit is used to isolate natural gas from the outside air;

[0009] A natural gas conveying unit, which is fixedly connected to the housing unit, and the natural gas conveying unit is used to install and limit the motor main body and the housing unit;

[0010] A first sealing unit, which is arranged in the housing unit, and the first sealing unit is used to isolate or communicate the housing unit with the natural gas conveying unit;

[0011] A second sealing unit, which is arranged in the natural gas conveying unit and cooperates with the first sealing unit for secondary sealing.

[0012] Preferably, the output end of the motor body is inserted into the housing unit. A blower impeller is installed at the output end of the motor body. The blower impeller is located in the housing unit, and the rotation of the blower impeller is adapted to the transportation of natural gas in the natural gas transportation unit.

[0013] Preferably, the housing unit includes:

[0014] A first housing, which is installed on the outer wall of the motor body, and a gasket is provided between the first housing and the motor body;

[0015] A second housing, which is connected to the first housing by bolts, and a gasket is provided between the first housing and the second housing.

[0016] Preferably, the natural gas transportation unit includes:

[0017] A base, which is fixedly connected to the outer wall of the first housing, and cooperates with the first housing to mount the motor body on the base;

[0018] An intake pipe, which is installed on the outer wall of the base, and the intake pipe communicates with the enclosed space between the first housing and the second housing;

[0019] An exhaust pipe, which is installed on the outer wall of the base and is symmetrically arranged with the intake pipe, and the exhaust pipe communicates with the enclosed space between the first housing and the second housing.

[0020] Preferably, a sealed tank body and a servo electric cylinder are installed on the base. A delivery pipe is connected to the sealed tank body, and the sealed tank body communicates with the inside of the housing unit and the exhaust pipe through the delivery pipe. The output end of the servo electric cylinder penetrates the first housing, and the output end of the servo electric cylinder is connected to the first sealing unit.

[0021] Preferably, the first sealing unit includes:

[0022] A first sealing seat, which is located in the first housing;

[0023] A second sealing seat, which is located in the first housing;

[0024] A connecting rod, one end of which is fixedly connected to the outer wall of the first sealing seat, and the other end of the connecting rod is connected to the output end of the servo electric cylinder;

[0025] A connecting component, which is located between the first sealing seat and the second sealing seat, and the connecting component cooperates with the first sealing seat to drive the second sealing seat to move.

[0026] Preferably, the connecting component includes:

[0027] A first connecting sleeve, which is fixedly connected to the outer wall of the first sealing seat;

[0028] A first spring, with its two ends fixedly connected to a first connecting sleeve and a second sealing seat respectively;

[0029] A second connecting sleeve, fixedly connected to the outer wall of the second sealing seat, and the second connecting sleeve is slidably connected to the outer peripheral wall of the first connecting sleeve;

[0030] A guide rod, fixedly connected to the outer wall of the second sealing seat, and the second sealing seat is slidably connected to the inner walls of the first sealing seat and the connecting rod.

[0031] Preferably, the second sealing unit includes:

[0032] A fixing ring, fixedly connected to the inner wall of the intake pipe;

[0033] A sealing assembly, arranged on the side of the fixing ring.

[0034] Preferably, the sealing assembly includes:

[0035] A sealing block, arranged corresponding to the intake pipe;

[0036] A connecting seat, rotatably connected to the sealing block;

[0037] A sliding sleeve, fixedly connected to the connecting seat, and the sliding sleeve is slidably connected to the fixing ring;

[0038] A moving rod, fixedly connected to the connecting seat, and the moving rod is slidably connected to the inner wall of the fixing ring;

[0039] A second spring, sleeved on the outer peripheral wall of the moving rod, and the two ends of the second spring are fixedly connected to the connecting seat and the fixing ring respectively.

[0040] The present invention discloses a natural gas explosion-proof motor with an online detection function, and the beneficial effects thereof are as follows:

[0041] 1. The integration of the online monitoring module and the intelligent control module enables real-time data collection and intelligent diagnosis of the motor operating status (such as winding temperature, vibration spectrum, gas concentration, etc.), allowing potential faults to be pre-warned in advance and effectively avoiding explosion and combustion accidents caused by overheating or mechanical failures. The dual-seal system constructs a hierarchical anti-leakage barrier through the dynamic opening and closing control of the first seal unit (response speed ≤ 50 ms) and the redundant seal structure of the second seal unit (IP68 protection level). After testing, it can reduce the methane permeability. The outer shell unit adopts an increased safety type structure design, and its internal pressure maintenance system can ensure a slightly positive pressure state inside the shell. Combined with the inert gas purging function, it completely isolates the external explosive environment. The modular connection design between the natural gas transmission unit and the main body improves the maintenance efficiency. At the same time, the metal seal layer (thickness ≥ 200 μm) formed by the flange surface laser cladding process still maintains excellent airtightness under high-temperature working conditions. This technical solution overall realizes a three-level safety system from state perception, intelligent decision-making to physical protection, and can improve the MTBF (Mean Time Between Failures) of the motor in Class IIA explosive environments.

[0042] 2. This natural gas explosion-proof motor with an online detection function integrates an online monitoring module and an intelligent control module to achieve real-time monitoring of the key parameters of the motor main body and the outer shell unit, and combines with a cloud analysis platform to achieve remote fault warning. Through the online detection and remote warning functions, it reduces the accidental downtime of equipment and improves production efficiency.

[0043] 3. This natural gas explosion-proof motor with an online detection function integrates multiple sensors in the online monitoring module, including temperature sensors, vibration sensors, humidity sensors, and insulation resistance detection devices, which are used to collect the motor operating parameters in real time, monitor problems such as motor overheating, bearing wear, and coil aging, and avoid accidents. Through a variety of high-precision sensors arranged at the stator, rotor, and bearing parts of the motor, the temperature sensors, vibration sensors, and humidity sensors monitor key parameters such as temperature, vibration, and humidity in real time. Combined with the online insulation resistance testing technology, it comprehensively covers the health status of the motor.

[0044] 4. This natural gas explosion-proof motor with an online detection function processes and analyzes the monitoring data in the intelligent control module, provides functions such as fault diagnosis, health assessment, and alarm, and at the same time realizes the remote transmission of data through the wireless communication module, timely discovers and warns potential faults, and monitors and analyzes the motor operating status in real time, effectively reducing the fault risk.

[0045] 5. The natural gas explosion-proof motor with online detection function has an intelligent control module that uses a microprocessor to analyze the collected data in real time, realizes fault type prediction and health status scoring based on machine learning algorithms, and provides local feedback through an LED display or an audible and visual alarm. At the same time, the data is uploaded to the cloud analysis platform through a wireless communication module. The overall design adopts a modular structure, which is convenient for installation, maintenance and replacement. At the same time, it can avoid the need for offline monitoring during regular maintenance, stopping the natural gas production process, and being unable to meet the high requirements for continuous operation in the natural gas production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0047] Figure 1 Schematic diagram of the overall structure of the embodiment of the present invention;

[0048] Figure 2 Schematic diagram of the natural gas explosion-proof motor of the embodiment of the present invention;

[0049] Figure 3 Schematic diagram of the structure of the natural gas transportation unit of the embodiment of the present invention;

[0050] Figure 4 Schematic diagram of the structure of the first sealing unit of the embodiment of the present invention;

[0051] Figure 5 Schematic diagram of the structure of the connecting component of the embodiment of the present invention;

[0052] Figure 6 Schematic diagram of the structure of the second sealing unit of the embodiment of the present invention;

[0053] Figure 7 Schematic diagram of the structure of the sealing component of the embodiment of the present invention.

[0054] Description of the reference numerals in the drawings:

[0055] 1. Motor main body; 11. Fan impeller;

[0056] 2. Housing unit; 21. First housing; 22. Second housing;

[0057] 3. Natural gas transportation unit; 31. Base; 32. Inlet pipe; 33. Exhaust pipe;

[0058] 4. First sealing unit; 41. First sealing seat; 42. Second sealing seat; 43. Connecting rod; 44. Connecting component; 441. First connecting sleeve; 442. First spring; 443. Second connecting sleeve; 444. Guide rod;

[0059] 5. Second sealing unit; 51. Fixed ring; 52. Sealing component; 521. Sealing block; 522. Connecting seat; 523. Sliding sleeve; 524. Moving rod; 525. Second spring;

[0060] 6. Sealed tank body; 7. Servo electric cylinder. Detailed implementation manners

[0061] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0062] By providing a natural gas explosion-proof motor with an online detection function in the embodiments of the present application, the problems of lack of real-time health status monitoring means, maintenance mainly based on regular inspections, difficulty in timely discovering and warning potential faults, and most existing detection methods being offline and not suitable for the high requirements of continuous operation in the natural gas production process are solved. By integrating a sensor module, a data acquisition module and an intelligent control module, real-time monitoring of key parameters of the motor main body 1 and the housing unit 2 is realized, and combined with a cloud analysis platform, remote fault warning is realized. Through the online detection and remote warning functions, the accidental shutdown time of the equipment is reduced and the production efficiency is improved.

[0063] The online monitoring module integrates multiple sensors, including a temperature sensor, a vibration sensor, a humidity sensor and an insulation resistance detection device, for real-time collecting motor operation parameters, monitoring problems such as motor overheating, bearing wear, and coil aging, and avoiding accidents;

[0064] The intelligent control module processes and analyzes the monitoring data, provides functions of fault diagnosis, health assessment and alarm, and at the same time realizes remote transmission of data through a wireless communication module, timely discovers and warns potential faults, and real-time monitors and analyzes the operation state of the motor, effectively reducing the fault risk.

[0065] An online monitoring module is arranged in the motor main body 1. Through a variety of high-precision sensors arranged at the motor stator, rotor and bearing parts, the temperature sensor, the vibration sensor and the humidity sensor real-time monitor key parameters such as temperature, vibration and humidity, and combined with the insulation resistance online testing technology, the health state of the motor is comprehensively covered;

[0066] The overall design is modular, which can improve the maintainability and service life of the equipment;

[0067] The intelligent control module uses a microprocessor to analyze the collected data in real time, predicts the fault type and scores the health status based on machine learning algorithms, and provides local feedback through an LED display or an audible and visual alarm. At the same time, the data is uploaded to the cloud analysis platform through the wireless communication module. The overall design adopts a modular structure, which is convenient for installation, maintenance and replacement.

[0068] At the same time, it avoids the problem of offline monitoring during regular maintenance and overhaul, which leads to the shutdown of the natural gas production process, thus better meeting the high requirements of natural gas production for continuous operation.

[0069] To better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation manners.

[0070] An embodiment of the present invention discloses a natural gas explosion-proof motor with an online detection function.

[0071] Embodiment 1:

[0072] According to the attached Figures 1-7 As shown, a natural gas explosion-proof motor with an online detection function includes:

[0073] A motor main body 1, on which an online monitoring module and an intelligent control module are provided;

[0074] Specifically, an explosion-proof junction box is provided on the motor main body 1, and an insulation monitor is connected to the explosion-proof junction box. It is connected to the power input terminal of the insulation monitor, and the grounding circuit is connected to the motor housing ground wire to monitor the winding-to-ground insulation state in real time; the insulation resistance between the motor winding and the housing is detected in real time to prevent short circuits or leakage caused by insulation aging, moisture or pollution. The early warning insulation deterioration threshold can be set to alarm below 50 MΩ to avoid explosion caused by electric sparks; the insulation monitor is a mature existing structure, and the model can be Bender IR155-4354, which will not be elaborated in this application.

[0075] By integrating a sensor module, a data acquisition module and an intelligent control module, the real-time monitoring of key parameters of the motor main body 1 and the housing unit 2 is realized, and remote fault warning is realized in combination with the cloud analysis platform. Through the online detection and remote warning functions, the accidental downtime of the equipment is reduced and the production efficiency is improved.

[0076] Furthermore, the online monitoring module integrates multiple sensors, including a temperature sensor, a vibration sensor, a humidity sensor, and an insulation resistance detection device, which are used to collect the motor operation parameters in real time. This is a mature existing structure and will not be elaborated in this application. It monitors problems such as motor overheating, bearing wear, and coil aging to avoid accidents.

[0077] Furthermore, the intelligent control module processes and analyzes the monitoring data, provides functions of fault diagnosis, health assessment, and alarm, and realizes remote transmission of the data through the wireless communication module to the cloud analysis platform, so as to be able to detect and warn of potential faults in time, monitor and analyze the motor operation status in real time, and effectively reduce the fault risk.

[0078] An online monitoring module is provided in the motor main body 1. Through a variety of high-precision sensors arranged at the motor stator, rotor, and bearing parts, such as a temperature sensor, a vibration sensor, and a humidity sensor, key parameters such as temperature, vibration, and humidity are monitored in real time. Combining with the online insulation resistance testing technology, the health status of the motor is comprehensively covered; modular design is adopted to improve the maintainability and service life of the equipment.

[0079] Furthermore, the intelligent control module uses a microprocessor to analyze the collected data in real time, realizes fault type prediction and health status scoring based on machine learning algorithms, and provides local feedback through an LED display or an audible and visual alarm. At the same time, the data is uploaded to the cloud analysis platform through the wireless communication module. The overall design adopts a modular structure, which is convenient for installation, maintenance, and replacement.

[0080] The housing unit 2 is installed on the outer wall of the motor main body 1. The housing unit 2 is used to isolate natural gas from the outside air; the explosion-proof housing of the housing unit 2 adopts high-strength materials and optimized structure design to meet the explosion-proof requirements of the natural gas environment. A wireless vibration sensor is installed on the outside of the housing unit 2 near the rotor support point to monitor the overall mechanical vibration, collect vibration acceleration and frequency spectrum, identify bearing wear, rotor imbalance, or coupling misalignment, and realize early warning of mechanical faults through vibration intensity and characteristic frequency analysis; in this way, combined with the explosion-proof design to meet the special requirements of the natural gas scenario and ensure safe operation.

[0081] The natural gas transmission unit 3 is fixedly connected to the housing unit 2. The natural gas transmission unit 3 is used to install and limit the motor main body 1 and the housing unit 2; the first sealing unit 4 is arranged in the housing unit 2. The first sealing unit 4 is used to isolate or connect the housing unit 2 and the natural gas transmission unit 3; the second sealing unit 5 is arranged in the natural gas transmission unit 3 and cooperates with the first sealing unit 4 for secondary sealing.

[0082] The output end of the motor main body 1 is inserted into the housing unit 2. A fan impeller 11 is installed at the output end of the motor main body 1. The fan impeller 11 is located in the housing unit 2. The rotation of the fan impeller 11 cooperates with the transportation of natural gas in the natural gas transportation unit 3. When the fan impeller 11 rotates in the housing unit 2, the air flow in the housing unit 2 is controlled, and then the natural gas is transported.

[0083] Wireless vibration sensors are installed directly above the outer rings of the bearings at the motor drive end and non-drive end to collect vibration acceleration and frequency spectrum, identify bearing wear, rotor imbalance or coupling misalignment, and at the same time monitor the rotational balance of the fan impeller 11. The wireless vibration sensor is a mature existing structure, and the model can be Emerson CSI 9420. This application will not elaborate on it here.

[0084] Furthermore, after the monitoring data is collected, it is processed and analyzed by the intelligent control module. If the parameters exceed the set threshold, an alarm is issued through the local alarm, and at the same time, the data is uploaded to the remote monitoring platform. Potential faults are predicted through historical data analysis and machine learning models, so as to achieve online fault warning and intelligent operation and maintenance.

[0085] As Figure 3 shown, the housing unit 2 may specifically include: a first housing 21, which is installed on the outer wall of the motor main body 1, and a gasket is provided between the first housing 21 and the motor main body 1; a second housing 22, which is connected to the first housing 21 by bolts, and a gasket is provided between the first housing 21 and the second housing 22. A closed space is formed by the first housing 21 and the second housing 22, which is convenient for the transportation of natural gas. At the same time, as Figure 1 shown, the fan impeller 11 is protected in the first housing 21 and the second housing 22, and the flow of natural gas is coordinated with the fan impeller 11 to transport the natural gas.

[0086] An explosion-proof infrared thermal imager is installed on the side of the housing unit 2. The explosion-proof infrared thermal imager is a mature existing structure, and the model can be FLIR E8-XT. This application will not elaborate on it here. It non-contact scans the surface temperature distribution of the motor, locates overheating points, such as the winding end, bearing or terminal, etc., and receives the infrared energy emitted by the object through a microbolometer to generate a thermal image.

[0087] As Figure 3As shown in the figure, the natural gas transportation unit 3 includes: a base 31, fixedly connected to the outer wall of the first housing 21, and cooperating with the first housing 21 to mount the motor main body 1 on the base 31; an intake pipe 32, mounted on the outer wall of the base 31, and the intake pipe 32 is communicated with the enclosed space of the first housing 21 and the second housing 22; an exhaust pipe 33, mounted on the outer wall of the base 31, symmetrically arranged with the intake pipe 32, and the exhaust pipe 33 is communicated with the enclosed space of the first housing 21 and the second housing 22. The intake pipe 32 and the exhaust pipe 33 cooperate in the housing unit 2 to transport natural gas.

[0088] A sealed tank body 6 and a servo electric cylinder 7 are mounted on the base 31. The servo electric cylinder 7 is a mature existing structure with a model number of CY134-R, which will not be elaborated in this application. A delivery pipe is connected to the sealed tank body 6, and the sealed tank body 6 is communicated with the interior of the housing unit 2 and the exhaust pipe 33 through the delivery pipe. The output end of the servo electric cylinder 7 penetrates the first housing 21, and the output end of the servo electric cylinder 7 is connected to the first sealing unit 4. When the air pressure in the housing unit 2 and the exhaust pipe 33 is too high, the gas is transported into the sealed tank body 6 for storage. An exhaust port is provided on the outer wall of the sealed tank body 6 to facilitate the recovery of the collected natural gas.

[0089] As Figure 4 shown in the figure, the first sealing unit 4 includes: a first sealing seat 41, located in the first housing 21; a second sealing seat 42, located in the first housing 21; a connecting rod 43, one end of which is fixedly connected to the outer wall of the first sealing seat 41, and the other end of the connecting rod 43 is connected to the output end of the servo electric cylinder 7; a connecting component 44, located between the first sealing seat 41 and the second sealing seat 42, and the connecting component 44 cooperates with the first sealing seat 41 to drive the second sealing seat 42 to move.

[0090] Specifically, a temperature sensor is embedded in the stator coil of the motor main body 1 to monitor the temperature rise. The temperature sensor is a mature existing structure, and the model can be Opsens OTG-M240, which will not be elaborated in this application, to prevent the temperature from exceeding the standard caused by poor heat dissipation or increased contact resistance.

[0091] Furthermore, when the temperature in the housing unit 2 reaches the set critical value, the servo electric cylinder 7 is linked, and the connecting rod 43 is controlled to move, driving the first sealing seat 41, the connecting component 44, and the second sealing seat 42 to move.

[0092] Furthermore, the first sealing seat 41 moves to seal the air inlet pipe 32 and the base 31, and at the same time, the first sealing seat 41 moves to cooperate with the connecting assembly 44 to drive the second sealing seat 42 to move, and an exchange valve is provided at the second outer shell 22 corresponding to the second sealing seat 42. The air flow is forced by an external explosion-proof fan to accelerate the heat loss from the surface of the outer shell unit 2. A labyrinth seal or an explosion-proof breathing valve is used to allow trace gas exchange without affecting the explosion-proof performance. The second sealing seat 42 is controlled not to seal the second outer shell 22, and the fan is cooperated to quickly cool down the inside of the outer shell unit 2.

[0093] When the temperature continues to rise, the shutdown system is linked to control the motor body 1 to stop, and an alarm is sounded, and manual maintenance is performed.

[0094] like Figure 5 As shown, the connecting assembly 44 includes: a first connecting sleeve 441, which is fixedly connected to the outer wall of the first sealing seat 41; a first spring 442, whose two ends are respectively fixedly connected to the first connecting sleeve 441 and the second sealing seat 42; a second connecting sleeve 443, which is fixedly connected to the outer wall of the second sealing seat 42, and the second connecting sleeve 443 is slidably connected to the outer peripheral wall of the first connecting sleeve 441; a guide rod 444, which is fixedly connected to the outer wall of the second sealing seat 42, and the second sealing seat 42 is slidably connected to the inner walls of the first sealing seat 41 and the connecting rod 43.

[0095] Specifically, by installing a combustible gas detector near the explosion-proof joint surface of the motor body 1, the combustible gas detector is an existing mature structure, and the model may be Honeywell MBS01, which is not elaborated in this application. It monitors the natural gas concentration in real time, warns of failure of the explosion-proof housing seal or infiltration of external gas, and triggers an alarm when the gas concentration reaches 10% of the lower explosion limit, links the shutdown system, and controls the motor body 1 to stop.

[0096] When the connecting rod 43 drives the first sealing seat 41 to move, the first sealing seat 41 drives the first connecting sleeve 441 to move. At this time, the first connecting sleeve 441 slides along the second connecting sleeve 443. At the same time, the reaction force of the first spring 442 restricts the second sealing seat 42 from moving.

[0097] Furthermore, when the first sealing seat 41 seals the intake pipe 32 and the exhaust pipe 33, the first spring 442 returns to its initial state. When cooling is performed toward the second outer shell 22, the air pressure pushes the second sealing seat 42 to move, compresses the first spring 442, and cools the interior of the outer shell unit 2. When cooling is completed, the first spring 442 rebounds, pushing the second sealing seat 42 to continue sealing the second outer shell 22, thereby preventing leakage of natural gas in the outer shell unit 2.

[0098] like Figure 6As shown, the second sealing unit 5 includes: a fixing ring 51 fixedly connected to the inner wall of the intake pipe 32; a sealing assembly 52 disposed on the side of the fixing ring 51.

[0099] As Figure 7 shown, the sealing assembly 52 includes:

[0100] a sealing block 521 disposed corresponding to the intake pipe 32; a connecting seat 522 rotatably connected to the sealing block 521. When natural gas enters the intake pipe 32, the natural gas pushes the sealing block 521 to rotate on the outer wall of the connecting seat 522.

[0101] Furthermore, when natural gas is not being transported, under the gravity of the sealing block 521, the sealing block 521 seals the intake pipe 32. When the intake pipe 32 moves, the intake pipe 32 contacts and presses the sealing block 521, and the sealing block 521 seals the intake pipe 32, cooperating with the intake pipe 32 for secondary sealing. The multi-layer sealing structure ensures airtightness and anti-corrosion performance.

[0102] a sliding sleeve 523 fixedly connected to the connecting seat 522 and slidably connected to the fixing ring 51.

[0103] a moving rod 524 fixedly connected to the connecting seat 522 and slidably connected to the inner wall of the fixing ring 51, used to limit the stable sliding of the connecting seat 522 and the fixing ring 51.

[0104] a second spring 525 sleeved on the outer peripheral wall of the moving rod 524, with both ends of the second spring 525 fixedly connected to the connecting seat 522 and the fixing ring 51 respectively.

[0105] Specifically, when the first sealing seat 41 moves towards the intake pipe 32 and the base 31 to seal the intake pipe 32 and the base 31 and separate the intake pipe 32 and the base 31 from the housing unit 2, the first sealing seat 41 moves to contact and press the sealing block 521, causing the sealing block 521 to push the connecting seat 522 and the sliding sleeve 523 to move.

[0106] Furthermore, the connecting seat 522 drives the moving rod 524 to slide on the inner wall of the fixing ring 51. At the same time, the moving rod 524 compresses the second spring 525. Under the rebound of the second spring 525, a reverse thrust is generated on the sealing block 521, and then the sealing block 521 fits with the first sealing seat 41 for secondary sealing.

[0107] Embodiment 2:

[0108] The housing unit 2 can be made of cast aluminum alloy material, reaching the Ex d IIB T4 rating. The surface of the housing is treated with an anti-corrosion coating to ensure reliability in high-humidity and highly corrosive environments;

[0109] Furthermore, the temperature sensor in the online monitoring module uses a PT100 platinum resistance and is arranged at the motor winding and bearing parts;

[0110] Furthermore, the vibration sensor selects a MEMS accelerometer, and the humidity sensor is placed inside the explosion-proof housing;

[0111] Furthermore, the insulation resistance detection module realizes real-time detection through the built-in voltage injection and current measurement circuits.

[0112] Furthermore, the intelligent control module runs machine learning algorithms through a microprocessor, conducts fault diagnosis based on the collected multi-parameter data, and uploads the data to the cloud monitoring platform through Wi-Fi or LoRa communication.

[0113] Specifically, the working process of the intelligent control module is as follows:

[0114] Step 1: Multi-source data acquisition and transmission.

[0115] The intelligent control module receives the heterogeneous sensor data streams from the motor main body and the housing unit in real time through a high-speed CAN bus, and the transmission rate is not less than 1 Mbps. The temperature sensor group uses PT1000 platinum resistors (accuracy ±0.1 °C) to continuously collect the temperatures of the stator winding, bearing housing, and housing surface; the three-axis MEMS vibration sensor monitors the rotor dynamic balance state with a ±50 g range and a 0.5 - 10 kHz frequency response range; the capacitive humidity sensor detects the internal environment humidity with an accuracy of ±1.5%; the insulation resistance test unit periodically measures the winding-to-ground insulation value through a DC 1000V megohmmeter. All data is transmitted with timestamp alignment through the RS-485 protocol, and the sampling period synchronization accuracy is controlled within 1 ms to ensure the spatio-temporal consistency of multi-source data.

[0116] Step 2: Data preprocessing and feature extraction.

[0117] The embedded preprocessing unit performs three-level cleaning on the original data: First, it eliminates high-frequency electromagnetic interference through a Butterworth low-pass filter with a cut-off frequency of 5 kHz; then it eliminates outliers based on the 3σ criterion using a 30-second sliding time window; finally, it normalizes each sensor signal to the [0, 1] interval using the min-max algorithm. The feature engineering module synchronously extracts 12-dimensional time-frequency domain features, including the temperature gradient (Δt / Δθ), the RMS value, kurtosis factor, and envelope spectrum energy of the vibration signal, the humidity change rate (dH / dt), and the second derivative of the insulation resistance decay curve, and finally generates a 128×12-dimensional feature matrix for subsequent analysis.

[0118] Step 3: Online Fault Diagnosis and Health Assessment.

[0119] A microprocessor with an ARM Cortex-M7 core (main frequency 600 MHz) performs multi-dimensional analysis: The improved random forest algorithm (500 decision trees) is used for fault mode recognition, and a fault probability vector such as bearing wear and insulation deterioration is output. The confidence threshold is set at 85%; the health status score constructs a weighted model based on the ISO 20816 standard, integrating the temperature deviation (40%), vibration intensity (30%), insulation level (20%), and environmental parameters (10%). The continuous score from 0 to 100 is updated every 10 minutes; the remaining life prediction analyzes 2000 groups of historical fault cases through a 128-node LSTM neural network, outputs the MTTF estimate and the 95% confidence interval, and realizes accurate degradation trend prediction.

[0120] Step 4: Multi-level Alarm and Local Response.

[0121] The system starts hierarchical response according to the health score: The first-level warning (70 - 60 points) triggers a slow flash of the yellow LED (1 Hz) and starts logging; the second-level alarm (60 - 40 points) activates an 85 dB audible and visual alarm (red light flashes quickly at 4 Hz), and at the same time sends a warning code to the DCS system through ModbusTCP; the third-level emergency shutdown (<40 points) immediately cuts off the main power supply and starts the standby braking unit, and sends a text message to the maintenance personnel synchronously. The local HMI interface displays the three-dimensional temperature field distribution map (Kriging interpolation), the vibration spectrum waterfall diagram (4096-point FFT), and the health score curve with an adjustable time span in real time, providing visual support for on-site decision-making.

[0122] Step 5: Cloud Data Fusion and Remote Analysis Executed by the Cloud Analysis Platform.

[0123] The NB-IoT wireless module (Band5 frequency band) establishes an AES-256 encrypted tunnel, uploads the original data packet compressed by the LZ77 algorithm (compression rate > 60%) every 5 minutes, and pushes the diagnosis conclusion in real time. The cloud analysis platform performs cross-device correlation analysis, compares the parameter distributions of the same model motor group; uses the density-based clustering algorithm DBSCAN to cluster abnormal degradation trajectories; automatically generates a PDF health report containing key parameter statistics and maintenance suggestions every week. The verified new fault mode is fed back to the edge model built into the intelligent control module. When a major risk warning occurs, a work order is automatically created and assigned to the nearest service station to form a closed-loop management. The edge model refers to the local machine learning model deployed in the intelligent control module.

[0124] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A natural gas explosion-proof motor with online detection function, characterized in that: include: A motor body (1) is provided with an online monitoring module and an intelligent control module; A housing unit (2) mounted on the outer wall of the motor body (1), the housing unit (2) being used to isolate the natural gas from the outside air; A natural gas delivery unit (3) fixedly connected to the housing unit (2), the natural gas delivery unit (3) being used to install and restrict the motor body (1) and the housing unit (2); A first sealing unit (4) is arranged in the housing unit (2), the first sealing unit (4) being used to isolate or connect the housing unit (2) and the natural gas transmission unit (3); The second sealing unit (5) is arranged in the natural gas transmission unit (3) and cooperates with the first sealing unit (4) to perform secondary sealing.

2. A natural gas explosion-proof motor with online detection function according to claim 1, characterized in that: The output end of the motor body (1) is plugged into the housing unit (2), and a fan impeller (11) is installed at the output end of the motor body (1). The fan impeller (11) is located in the housing unit (2), and the fan impeller (11) rotates to cooperate with the natural gas delivery in the natural gas delivery unit (3).

3. The natural gas explosion-proof motor with online detection function according to claim 1 is characterized in that: The housing unit (2) comprises: A first housing (21) is mounted on the outer wall of the motor body (1), and a sealing gasket is provided between the first housing (21) and the motor body (1); The second housing (22) is connected to the first housing (21) via bolts, and a sealing gasket is provided between the first housing (21) and the second housing (22).

4. The natural gas explosion-proof motor with online detection function according to claim 1 is characterized in that: The natural gas transmission unit (3) comprises: A base (31) is fixedly connected to the outer wall of the first housing (21), and the motor body (1) is mounted on the base (31) in cooperation with the first housing (21); An air intake pipe (32) is installed on the outer wall of the base (31), and the air intake pipe (32) is connected to the closed space of the first shell (21) and the second shell (22); An exhaust pipe (33) is mounted on the outer wall of the base (31) and is symmetrically arranged with the air inlet pipe (32). The exhaust pipe (33) is in communication with the enclosed space of the first shell (21) and the second shell (22).

5. The natural gas explosion-proof motor with online detection function according to claim 4 is characterized in that: A sealed tank body (6) and a servo electric cylinder (7) are mounted on the base (31); a delivery pipe is connected to the sealed tank body (6); the sealed tank body (6) is connected to the interior of the housing unit (2) and the exhaust pipe (33) through the delivery pipe; an output end of the servo electric cylinder (7) passes through the first housing (21); and the output end of the servo electric cylinder (7) is connected to the first sealed unit (4).

6. The natural gas explosion-proof motor with online detection function according to claim 5, characterized in that: The first sealing unit (4) comprises: A first sealing seat (41) located in the first housing (21); A second sealing seat (42) located in the first housing (21); A connecting rod (43), one end of which is fixedly connected to the outer wall of the first sealing seat (41), and the other end of the connecting rod (43) is connected to the output end of the servo electric cylinder (7); The connecting component (44) is located between the first sealing seat (41) and the second sealing seat (42), and the connecting component (44) cooperates with the first sealing seat (41) to drive the second sealing seat (42) to move.

7. The natural gas explosion-proof motor with online detection function according to claim 6, characterized in that: The connection assembly (44) comprises: A first connecting sleeve (441) fixedly connected to the outer wall of the first sealing seat (41); A first spring (442), two ends of which are respectively fixedly connected to the first connecting sleeve (441) and the second sealing seat (42); A second connecting sleeve (443) is fixedly connected to the outer wall of the second sealing seat (42), and the second connecting sleeve (443) is slidably connected to the outer peripheral wall of the first connecting sleeve (441); The guide rod (444) is fixedly connected to the outer wall of the second sealing seat (42), and the second sealing seat (42) is slidably connected to the inner wall of the first sealing seat (41) and the connecting rod (43).

8. The natural gas explosion-proof motor with online detection function according to claim 4 is characterized in that: The second sealing unit (5) comprises: A fixing ring (51) fixedly connected to the inner wall of the air inlet pipe (32); A sealing assembly (52) is arranged on the side of the fixing ring (51).

9. The natural gas explosion-proof motor with online detection function according to claim 8, characterized in that: The sealing assembly (52) comprises: A sealing block (521) is arranged corresponding to the air inlet pipe (32); A connecting seat (522) rotatably connected to the sealing block (521); A sliding sleeve (523) fixedly connected to the connecting seat (522), wherein the sliding sleeve (523) is slidably connected to the fixing ring (51); A moving rod (524) fixedly connected to the connecting seat (522), wherein the moving rod (524) is slidably connected to the inner wall of the fixing ring (51); The second spring (525) is sleeved on the outer peripheral wall of the moving rod (524), and the two ends of the second spring (525) are respectively fixedly connected to the connecting seat (522) and the fixing ring (51).

10. The natural gas explosion-proof motor with online detection function according to claim 1, characterized in that: The online monitoring module integrates multiple sensors, including a temperature sensor, a vibration sensor, a humidity sensor and an insulation resistance detection device, for real-time acquisition of motor operating parameters.

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