Total air quality monitoring device, system and method for railway vehicle

Abstract

The invention discloses a total air quality monitoring device, system and method for a rail vehicle, and relates to the technical field of rail traffic air supply monitoring. The main air quality monitoring device for the railway vehicle comprises a main air pipe, a main air inlet and a main air outlet, two ends of the temperature and humidity monitoring branch are respectively communicated with the main blast pipe, and the temperature and humidity monitoring branch is connected with the main blast pipe in parallel and is used for detecting the temperature and humidity of air online in real time; one end of the gas concentration monitoring branch is communicated with the gas inlet of the temperature and humidity monitoring branch, the other end of the gas concentration monitoring branch is provided with an exhaust port, and the gas concentration monitoring branch is used for monitoring oil and gas indexes according to a preset period and sending out corresponding early warning signals according to oil and gas index threshold values. The system solves the problems that in the current industry, main air monitoring is mainly pressure monitoring, the air cleanliness is guaranteed by means of a filtering component of an air compressor, if the filtering component of the air compressor loses efficacy or is damaged, substandard air enters precise equipment such as a brake control device, the equipment is damaged, and the service life of the equipment is prolonged. And the vehicle safety is influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit air supply monitoring, and particularly to a main air quality monitoring device, system and monitoring method for rail vehicles. Background Art

[0002] As an important prerequisite for the use of facilities such as train braking and suspension, the quality of the air source provided by the main air supply system is directly related to the safety of the vehicle and also has an important impact on the health and lifespan of the equipment.

[0003] Currently, the industry mainly monitors the main air pressure, and the air purity depends on the filtering components of the air compressor itself. If the filtering components of the air compressor itself fail or are damaged, unqualified air will enter precision equipment such as the brake control device, causing equipment damage and affecting vehicle safety. At present, no effective solution has been proposed. Summary of the Invention

[0004] Object of the Invention: To provide a main air quality monitoring device, system and monitoring method for rail vehicles to at least solve one of the problems existing in the above-mentioned prior art.

[0005] Technical Solution: A main air quality monitoring device for rail vehicles includes: A main air pipe; A temperature and humidity monitoring branch, with both ends respectively connected to the main air pipe and arranged in parallel with the main air pipe, for real-time online detection of the temperature and humidity of the air; A gas concentration monitoring branch, with one end connected to the air inlet of the temperature and humidity monitoring branch and the other end provided with an exhaust port, for monitoring the oil and gas index according to a preset period and sending out corresponding warning signals according to the oil and gas index threshold; and A particle monitoring branch, with one end connected to the air inlet of the gas concentration monitoring branch and the other end connected to the front end of the exhaust port, for monitoring the particles in the air according to a preset period and sending out corresponding warning signals according to the particle threshold; Wherein, by independently arranging a temperature and humidity monitoring branch on the main air pipe, independently arranging a gas concentration monitoring branch on a temperature and humidity monitoring branch, and independently arranging a particle monitoring branch on a gas concentration monitoring branch, the air quality in the main air pipe is monitored independently respectively.

[0006] Preferably, the temperature and humidity monitoring branch is connected to the main air pipe through a plurality of first interfaces; Wherein, the number of the plurality of first interfaces is two, and the two first interfaces are respectively an air inlet interface and an air outlet interface.

[0007] Preferably, the temperature and humidity monitoring branch includes: a first pipeline with two ends respectively communicating with the first interface, and a cut-off cock with side discharge, a temperature and humidity sensor, and a cut-off cock are sequentially arranged on the first pipeline along a preset direction.

[0008] Preferably, a check valve is further arranged between the temperature and humidity monitoring branch and the gas concentration monitoring branch. One end of the check valve is arranged between the cut-off cock with side discharge and the temperature and humidity sensor, and the other end is arranged at the air inlet of the gas concentration monitoring branch.

[0009] Preferably, the gas concentration monitoring branch includes: a second pipeline with two ends respectively communicating with the check valve and the exhaust port, and an oil and gas branch pressure regulating valve, an oil and gas branch constriction plug, a volatile gas concentration sensor, and an exhaust solenoid valve are sequentially arranged on the second pipeline along the preset direction.

[0010] Preferably, an oil and gas branch test interface is arranged between the oil and gas branch constriction plug and the volatile gas concentration sensor.

[0011] Preferably, the particle monitoring branch includes: a third pipeline with one end arranged between the check valve and the oil and gas branch pressure regulating valve, and the other end arranged between the exhaust solenoid valve and the exhaust port. A particle branch pressure regulating valve, a particle branch constriction plug, a flow valve, and a dust particle counter are sequentially arranged on the third pipeline along the preset direction.

[0012] Preferably, a particle branch test interface is arranged between the particle branch constriction plug and the flow valve.

[0013] Preferably, it further includes: a signal output port, and the signal output port is electrically connected to the temperature and humidity monitoring branch, the gas concentration monitoring branch, and the particle monitoring branch respectively.

[0014] To achieve the above object, according to another aspect of the present application, a main air quality monitoring system for rail vehicles is provided.

[0015] The main air quality monitoring system for rail vehicles according to the present application includes the main air quality monitoring device for rail vehicles as described above; The number of the main air quality monitoring devices for rail vehicles is two, and the two main air quality monitoring devices for rail vehicles are respectively connected in parallel to the main air pipe; The main air pipe is respectively communicated with two air compressors; The air compressor is connected to the train control system, and the train control system is connected to the signal output port through a hard wire or a wireless communication module.

[0016] To achieve the above object, according to another aspect of the present application, a method for monitoring the total air quality of rail vehicles is provided.

[0017] The method for monitoring the total air quality of rail vehicles according to the present application includes: The temperature and humidity sensor collects and detects the temperature and humidity values of the compressed air in the main air pipe in real time and online, and sends the collected temperature and humidity values to the control system. The control system compares the temperature and humidity values with the preset temperature and humidity thresholds, and when the temperature and humidity values continuously exceed the standard within a preset time, an alarm signal is output to the train control system; The volatile gas concentration sensor collects and detects the oil and gas values of the compressed air in the main air pipe in real time and online according to a preset cycle, and sends the collected oil and gas values to the control system. The control system compares the oil and gas values with the preset oil and gas thresholds, and when the oil and gas values continuously exceed the standard within several cycles, an alarm signal is output to the train control system; The dust particle counter collects and detects the number of particles of the compressed air in the main air pipe in real time and online according to a preset cycle, and sends the collected number of particles to the control system. The control system compares the number of particles with the preset number of particle thresholds, and when the number of particles exceeds the standard, an alarm signal is output to the train control system; Wherein, when the control system receives at least one alarm signal, the control system issues a control instruction to control the air compressor to stop running and marks it as a failure.

[0018] Preferably, when the single-end air compressor is working and the monitoring device receives an alarm, the monitoring device sends an air compressor switching request to the train control system. The train control system issues a control instruction to control the current air compressor to stop and marks it as a failure, and at the same time starts the standby air compressor; or, When two air compressors are working simultaneously, the train control system analyzes the faulty air compressor based on the data differences of the two monitoring devices, and marks the air compressor as a failure and deactivates it after the air pressure reaches the standard.

[0019] Beneficial effects: In the embodiments of the present application, a method of separately and independently detecting the total air quality using multiple monitoring devices is adopted. By independently arranging a temperature and humidity monitoring branch on the total air duct, and independently arranging a gas concentration monitoring branch on the temperature and humidity monitoring branch, and independently arranging a particle monitoring branch on the gas concentration monitoring branch, the air quality in the total air duct is separately and independently monitored, achieving the purpose of real-time monitoring of the temperature and humidity indicators of the total air and periodic monitoring of the oil-gas and dust particle indicators. Thus, the technical effects of good early warning, protection, and extension of the equipment service life are realized, and furthermore, the technical problem that in the current industry, the monitoring of the total air is mainly pressure monitoring, and the air purity depends on the filtering components of the air compressor itself is solved. If the filtering components of the air compressor itself fail or are damaged, unqualified air will enter precision equipment such as the brake control device, causing equipment damage and affecting vehicle safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a total air quality monitoring device for rail vehicles according to an embodiment of the present application; and Figure 2 is a schematic structural diagram of a total air quality monitoring system for rail vehicles according to an embodiment of the present application.

[0021] Reference numerals are as follows: 10, total air duct; 20, temperature and humidity monitoring branch; 201, first pipeline; 202, cut-off cock with side discharge; 203, temperature and humidity sensor; 204, cut-off cock; 30, gas concentration monitoring branch; 301, second pipeline; 302, pressure regulating valve for oil-gas branch; 303, choke for oil-gas branch; 304, volatile gas concentration sensor; 305, exhaust solenoid valve; 306, test interface for oil-gas branch; 40, particle monitoring branch; 401, third pipeline; 402, pressure regulating valve for particle branch; 403, choke for particle branch; 404, flow valve; 405, dust particle counter; 406, test interface for particle branch; 50, first interface; 60, check valve; 70, signal output port; 80, exhaust port; 90, air compressor; 100, train control system. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0023] It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances for the embodiments of this application described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0024] In addition, the terms "installation", "setting", "provided with", "connection", "connected", "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components or parts. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will detail this application with reference to the drawings and in conjunction with the embodiments.

[0026] As Figure 1-2 shown, this application relates to a total air mass monitoring device, system and monitoring method for rail vehicles. The total air mass monitoring device for rail vehicles includes: a main air pipe 10; the main air pipe 10 refers to the main air flow channel of the entire rail vehicle system, through which air is transmitted to achieve the effect of normal air supply. In this application, the main air pipe 10 is represented by MRP.

[0027] A temperature and humidity monitoring branch 20, with both ends respectively connected to the main air duct 10 and arranged in parallel with the main air duct 10, is used for real-time online detection of the temperature and humidity of the air; by independently arranging this branch on the main air duct 10, it is used for real-time monitoring of the temperature and humidity of the air; through this branch, the system can continuously track the changes in the temperature and humidity of the air; both ends of the temperature and humidity monitoring branch 20 are respectively connected to the main air duct 10 and arranged in parallel, ensuring that the air flow is not interfered by the monitoring equipment.

[0028] A gas concentration monitoring branch 30, with one end connected to the air inlet of the temperature and humidity monitoring branch 20 and the other end provided with an exhaust port 80, is used for monitoring oil and gas indicators according to a preset period and sending corresponding warning signals according to the oil and gas indicator thresholds; by connecting this branch to the air inlet of the temperature and humidity monitoring branch 20, it can be used for monitoring the oil and gas concentration in the air; for example: petroleum volatiles, chemical gases, etc. The gas concentration monitoring branch 30 regularly monitors the oil and gas concentration in the air and sends a warning signal when the concentration exceeds the set threshold. Preferably, the exhaust port 80 is a silencing exhaust port 80; in this application, the silencing exhaust port 80 is represented by EXP.

[0029] A particle monitoring branch 40, with one end connected to the air inlet of the gas concentration monitoring branch 30 and the other end connected to the front end of the exhaust port 80, is used for monitoring the particles in the air according to a preset period and sending corresponding warning signals according to the particle thresholds; by connecting this branch to the air inlet of the gas concentration monitoring branch 30 and the other end to the front end of the exhaust port 80, it can be used for monitoring the particulate matter in the air; for example: dust, smoke, PM2.5, etc., and sending corresponding warning signals when the particle concentration exceeds the set threshold.

[0030] Among them, by independently arranging one of the temperature and humidity monitoring branches 20 on the main air duct 10, and independently arranging one of the gas concentration monitoring branches 30 on one of the temperature and humidity monitoring branches 20, and independently arranging one of the particle monitoring branches 40 on one of the gas concentration monitoring branches 30, to separately and independently monitor the air quality in the main air duct 10. By separately and independently arranging the temperature and humidity monitoring branch 20, the gas concentration monitoring branch 30, and the particle monitoring branch 40 on the main air duct 10; each monitoring branch conducts air quality monitoring at its respective position without interfering with each other, ensuring comprehensive and detailed monitoring of the air quality.

[0031] Adopting a parallel structure: the temperature and humidity monitoring branch 20, the gas concentration monitoring branch 30, and the particle monitoring branch 40 are arranged in parallel, and can work simultaneously to independently monitor different air quality parameters.

[0032] Each monitoring branch conducts data collection according to a preset time period; for example: several hours or several days, which can be adjusted according to actual usage requirements.

[0033] Early warning function: When a certain monitoring parameter exceeds the set threshold, the corresponding monitoring branch will send out an early warning signal, ensuring that the system can respond in a timely manner to changes in air quality, thereby achieving the effect of ensuring air quality safety; at the same time, it can also achieve the effect of protecting equipment, thereby achieving the effect of extending service life.

[0034] The total air quality monitoring device for rail vehicles in this application consists of three core sensors, namely a temperature and humidity sensor 203, a volatile gas concentration sensor 304, and a dust particle counter 405, as well as supporting air circuit and electrical components; there are two sets of this device for each train, which are respectively connected to the main air ducts 10 downstream of the air compressor 90, and can monitor the temperature and humidity indicators of the main air in real time, and periodically monitor the oil-gas and dust particle indicators.

[0035] When one or more of the three indicators are monitored to exceed the standard, this device will alarm the vehicle through the network or hard wire or both at the same time.

[0036] When the single-end air compressor 90 is working and the device alarms, this monitoring device sends a request for switching the air compressor 90 to the train control system 100. The train control system will command the current air compressor 90 to stop and mark it as faulty, and at the same time start the standby air compressor 90; When two air compressors 90 are started simultaneously, based on the data differences of the two monitoring devices, the faulty air compressor 90 is analyzed, and after the air pressure reaches the standard, this air compressor 90 is marked as faulty and deactivated.

[0037] From the above description, it can be seen that this application has achieved the following technical effects: In the embodiment of this application, a method of using multiple monitoring devices to independently detect the total air quality is adopted. By independently setting a temperature and humidity monitoring branch 20 on the main air duct 10, and independently setting a gas concentration monitoring branch 30 on a temperature and humidity monitoring branch 20, and independently setting a particle monitoring branch 40 on a gas concentration monitoring branch 30 to independently monitor the air quality in the main air duct 10 respectively, the purpose of real-time monitoring of the temperature and humidity indicators of the main air and periodic monitoring of the oil-gas and dust particle indicators is achieved, thereby achieving good early warning, protection, and the technical effect of extending the service life of the equipment, and further solving the technical problem that in the current industry, the monitoring of the main air is mainly pressure monitoring, and the air purity depends on the filtering components of the air compressor 90 itself. If the filtering components of the air compressor 90 itself fail or are damaged, unqualified air will enter precision equipment such as the brake control device, causing equipment damage and affecting vehicle safety.

[0038] Further, the temperature and humidity monitoring branch 20 is connected to the main air duct 10 through a plurality of first interfaces 50; Among them, the number of the plurality of first interfaces 50 is two, and the two first interfaces 50 are an air inlet interface and an air outlet interface respectively. It can be understood that a good connection effect between pipelines can be achieved, thereby ensuring a good air transmission effect. In this application, the air inlet interface is P1, and the air outlet interface is P2.

[0039] Specifically, the plurality of first interfaces 50 are used to connect the temperature and humidity monitoring branch 20 and the main air duct 10, which can ensure smooth air flow and avoid interference with monitoring equipment.

[0040] The air inlet interface is used to flow air from the main air duct 10 into the temperature and humidity monitoring branch 20, which can achieve the effect of guiding air into the monitoring branch for temperature and humidity detection.

[0041] The air outlet interface is used to discharge the air after it passes through the temperature and humidity monitoring branch 20; the setting of the air outlet interface is to ensure that the air can smoothly pass through the monitoring branch and continue to flow to other parts of the main air duct 10 without affecting the ventilation efficiency of the system.

[0042] The working principle of the interface is as follows: When air flows through the main air duct 10, the temperature and humidity monitoring branch 20 inhales a part of the air through the air inlet interface for temperature and humidity measurement; after the measurement is completed, the air is discharged through the air outlet interface and returns to the main air duct 10 to ensure unobstructed air flow. It ensures that the temperature and humidity monitoring branch 20 can obtain air samples for detection in real time and continuously without affecting the air flow or ventilation effect of the entire air duct system.

[0043] Further, the temperature and humidity monitoring branch 20 includes: a first pipeline 201 with both ends respectively connected to the first interface 50, and a side-discharge cut-off valve 202, a temperature and humidity sensor 203, and a cut-off valve 204 are sequentially arranged on the first pipeline 201 along a preset direction. It can be understood that the effect of real-time collection and temperature and humidity detection of air can be achieved, thereby ensuring that the temperature and humidity values of the air meet the preset threshold standards. In this application, the temperature and humidity sensor 203 is represented by THS; the side-discharge cut-off valve 202 is represented by BCV, and the cut-off valve 204 is represented by BC.

[0044] Specifically, the first pipeline 201 is the main channel of the temperature and humidity monitoring branch 20, and air enters through this pipeline from the main air duct 10 and is guided to the temperature and humidity monitoring device. Both ends of this pipeline are connected to the main air duct 10 through the first interface 50. Among them, along the preset direction means that the direction of air flow in the pipeline is set according to the design requirements, flowing in from the air inlet and flowing out from the air outlet after passing through each component.

[0045] The cut-off cock 202 with side exhaust is usually used to control the air flow in the pipeline. It can be opened or closed to adjust the flow rate or cut off the circulation. By adopting the design with side exhaust, when it is closed, it will not completely cut off the air flow, but export part of the air through the side exhaust port, avoiding pressure changes or air stagnation caused by complete enclosure of the system; it can also better control the process of collecting air samples.

[0046] This component is arranged in the first pipeline 201 and is used to adjust and cut off the air flow, facilitating the maintenance, cleaning or adjustment of the system.

[0047] The temperature and humidity sensor 203 is located in the first pipeline 201 and is used to monitor the temperature and humidity of the air passing through the pipeline in real time. It is the core monitoring component of the system, and its data is used to evaluate the air quality; the sensor transmits the acquired temperature and humidity data to the system control unit for analyzing and judging whether the air quality meets the preset standards and may trigger an alarm.

[0048] After the temperature and humidity sensor 203, a cut-off cock 204 is further arranged on the pipeline. It is used in cooperation with the previous cut-off cock 204 to further control or cut off the air flow; this cut-off cock 204 can be closed when necessary to prevent the air from continuing to flow, facilitating system maintenance, calibrating the sensor or performing other operations.

[0049] The working principle of the temperature and humidity monitoring branch 20 is as follows: When the air passes through the first pipeline 201, it first passes through the cut-off cock 202 with side exhaust. If necessary, part of the air is exhausted from the side; then, the air enters the temperature and humidity sensor 203, and the sensor will monitor the temperature and humidity of the air in real time and record the data; after measurement, the air continues to flow and passes through the cut-off cock 204 to the air outlet; by setting the above-mentioned cocks, the entire system can flexibly adjust the flow rate and close the pipeline to ensure the smooth progress of the monitoring work.

[0050] Furthermore, a check valve 60 is also arranged between the temperature and humidity monitoring branch 20 and the gas concentration monitoring branch 30. One end of the check valve 60 is arranged between the cut-off cock 202 with side exhaust and the temperature and humidity sensor 203, and the other end is arranged at the air inlet of the gas concentration monitoring branch 30. It can be understood that by setting the check valve 60, its function is to allow air or gas to flow in only one direction, preventing the air flow from flowing back into the system, ensuring the measurement accuracy and safety of the gas concentration monitoring branch 30, and thus preventing the gas reflux caused by abnormal external pressure from damaging components such as sensors. Among them, in this application, the check valve 60 is represented by CV.

[0051] Further, the gas concentration monitoring branch 30 includes: a second pipeline 301 with two ends respectively connected to the check valve 60 and the exhaust port 80. Along the preset direction on the second pipeline 301, there are sequentially arranged an oil and gas branch pressure regulating valve 302, an oil and gas branch choke 303, a volatile gas concentration sensor 304, and an exhaust solenoid valve 305. It can be understood that the effect of real-time collection and monitoring of the oil and gas state of the air in the main air duct 10 can be achieved, so as to ensure that the oil and gas index is within the preset threshold range, and further ensure good air quality. At the same time, the effect of protecting the equipment can also be achieved. In this application, the volatile gas concentration sensor 304 is represented by VGS, the oil and gas branch pressure regulating valve 302 is represented by PRV1, the oil and gas branch choke 303 is represented by SC1, and the exhaust solenoid valve 305 is represented by MV.

[0052] Specifically, the second pipeline 301 is the main channel in the gas concentration monitoring branch 30, and its two ends are respectively connected to other parts of the system through the check valve 60 and the exhaust port 80; air flows through this pipeline for gas concentration monitoring.

[0053] The oil and gas branch pressure regulating valve 302 is used to regulate the gas flow rate and pressure entering the gas concentration monitoring branch 30; since gas concentration monitoring equipment usually has certain requirements for gas flow rate and pressure, a pressure regulating valve is needed to ensure that the gas flow rate is stable and meets the requirements of sensor measurement; this pressure regulating valve can keep the gas flow rate and pressure within the preset range to ensure the accuracy of subsequent measuring equipment.

[0054] The oil and gas branch choke 303 is a device for reducing gas flow rate. By restricting the cross-sectional area of the pipeline, the gas flow rate flowing through the pipeline is reduced to help control the flow rate and make it meet the working requirements of the sensor; the setting of this component can help the gas flow more smoothly and avoid unstable or inaccurate measurement data caused by too large or too small flow rate.

[0055] The volatile gas concentration sensor 304 is the core component of the gas concentration monitoring branch 30, responsible for monitoring the concentration of gases such as oil and gas and volatile organic compounds (VOCs) in the air. The sensor outputs corresponding signals according to the change of gas concentration for further analysis by the system.

[0056] The volatile gas sensor can real-time monitor the oil and gas concentration in the air, especially in the transportation environment, and can detect harmful gases that may pose hazards to health or the environment.

[0057] The exhaust solenoid valve 305 is arranged at the end of the gas concentration monitoring branch 30 and is responsible for controlling the gas discharge; when gas needs to be discharged or stopped from being discharged, the solenoid valve can be automatically opened or closed according to the system control signal to ensure the smoothness of gas discharge; the automatic control of this solenoid valve can effectively adjust the gas flow state of the system, avoid excessive or insufficient gas outflow, and ensure the stability of gas concentration monitoring.

[0058] The working principle of the gas concentration monitoring branch 30 is as follows: When air flows into the gas concentration monitoring branch 30, the gas first passes through the check valve 60 to ensure unidirectional air flow; after entering the second pipeline 301, the air flow passes through the oil and gas branch pressure regulating valve 302 to adjust the pressure and flow rate of the air flow, ensuring a stable flow rate supply to subsequent equipment; the air flow passes through the oil and gas branch choke 303 to further reduce the flow rate, ensuring that the air flow is appropriate and matches the measurement requirements of the sensor; subsequently, the air flow enters the volatile gas concentration sensor 304 for gas concentration detection, and the sensor will output a signal according to the change in gas concentration; finally, after passing through the exhaust solenoid valve 305, the gas is discharged or controlled to be closed to ensure normal air flow in the system.

[0059] Furthermore, an oil and gas branch test interface 306 is arranged between the oil and gas branch choke 303 and the volatile gas concentration sensor 304. It can be understood that good oil and gas calibration effects can be achieved, thereby ensuring the accuracy of oil and gas testing. In this application, the oil and gas branch test interface 306 is represented by TP1.

[0060] Furthermore, the particle monitoring branch 40 includes: a third pipeline 401 with one end arranged between the check valve 60 and the oil and gas branch pressure regulating valve 302 and the other end arranged between the exhaust solenoid valve 305 and the exhaust port 80. Along the preset direction, the third pipeline 401 is successively provided with a particle branch pressure regulating valve 402, a particle branch choke 403, a flow valve 404, and a dust particle counter 405. It can be understood that good collection and detection effects of particles in the main air duct 10 can be achieved, thereby ensuring that the particle index is within the preset threshold range, and further ensuring good air quality. At the same time, the effect of protecting equipment can also be achieved. In this application, the dust particle counter 405 is represented by DPC, the particle branch pressure regulating valve 402 is represented by PRV2, the particle branch choke 403 is represented by SC2, and the flow valve 404 is represented by FV.

[0061] Specifically, the third pipeline 401 is the main channel of the particle monitoring branch 40, which is used to direct the air flow from one end between the check valve 60 and the pressure regulating valve 302 of the oil-gas branch to the other end between the exhaust solenoid valve 305 and the exhaust port 80; the air flows in this pipeline and passes through a series of monitoring components; ensuring that the particulate matter detection device can receive an accurate air flow sample to measure the particulate concentration in the air.

[0062] The particle branch pressure regulating valve 402 is located in the third pipeline 401 and is used to regulate the pressure of the air flow; since the particulate matter detection instrument has certain requirements for the pressure and flow rate of the air flow, the pressure regulating valve can ensure that the air flow flows into the subsequent particulate matter monitoring equipment at an appropriate pressure. By adjusting the pressure, the pressure regulating valve helps to maintain a stable flow rate, thereby improving the accuracy of particle monitoring.

[0063] The particle branch choke 403 is located after the particle branch pressure regulating valve 402 and is used to limit the gas flow rate in the pipeline, helping to further regulate the air flow speed; by choking the pipeline and reducing the gas flow rate, it ensures that the particulate matter sampling process is not affected by an excessive flow rate, thereby improving the accuracy of particulate matter concentration measurement. It can help control the air flow speed so that the sensor can collect particulate samples that meet the requirements.

[0064] The flow valve 404 is another key regulating component in the particle monitoring branch 40 and is responsible for controlling the air flow rate through the pipeline; the precise control of the air flow rate is crucial for particulate matter monitoring because too high or too low an air flow rate may cause measurement errors. Through the adjustment of the flow valve 404, the system can ensure that the air flow maintains a constant flow rate in front of the sensor, thereby improving the detection accuracy of particulate matter.

[0065] The dust particle counter 405 is the core monitoring device of the particle monitoring branch 40 and is mainly used to detect and count the quantity and concentration of various particulate matters in the air. The dust particle counter 405 can measure dust, soot, dust and other particulate matters in the air in real time and give the concentration value of the particulate matter according to the set standard. Usually, the size and quantity of particulate matter are measured by the principle of laser scattering or other detection methods, and the data is transmitted to the system control unit for further analysis and processing.

[0066] The working principle of the particle monitoring branch 40 is as follows: After the air flows through the third pipeline 401, it first passes through the particle branch pressure regulating valve 402 to ensure that the pressure of the airflow meets the requirements; then, the airflow passes through the particle branch shrink plug 403 to limit the flow and further ensure the stability of the airflow; then, the airflow flows through the flow valve 404 to further accurately control the flow to ensure that the particle monitoring equipment obtains appropriate airflow; finally, the airflow enters the dust particle counter 405 to perform real-time detection of the particle concentration in the air through particle counting and concentration measurement; after detection, the airflow finally flows to the exhaust port 80 through the exhaust solenoid valve 305 to complete the monitoring process.

[0067] Further, a particle branch test interface 406 is provided between the particle branch plug 403 and the flow valve 404. It can be understood that a good particle calibration effect can be achieved, thereby ensuring the accuracy of the particle test. In the present application, the particle branch test interface 406 is represented by TP2.

[0068] Furthermore, it also includes: a signal output port 70, and the signal output port 70 is electrically connected to the temperature and humidity monitoring branch 20, the gas concentration monitoring branch 30 and the particle monitoring branch 40. It can be understood that a good electrical signal transmission effect can be achieved, thereby providing a guarantee for good electrical control. In this application, the signal output port 70 is represented by SP.

[0069] The present application also relates to a total wind quality monitoring system for a rail vehicle, comprising the total wind quality monitoring device for a rail vehicle as described above; The number of the rail vehicle total air quality monitoring devices is two, and the two rail vehicle total air quality monitoring devices are respectively connected in parallel to the main air duct 10; The main air duct 10 is connected to two air compressors 90 respectively; The air compressor 90 is connected to the train control system 100 , and the train control system 100 is connected to the signal output port 70 via a hard line or a wireless communication module.

[0070] Specifically, the system is equipped with two total air quality monitoring devices for rail vehicles, which can ensure continuous and stable monitoring of air quality during train operation.

[0071] Two monitoring devices are connected in parallel to the main air duct 10, and each works independently, but both are connected to the same main air duct 10; in this way, if one device fails, the other can continue to work, thereby improving the reliability of the system.

[0072] The main air duct 10 is a pipeline for transmitting gas, and the air compressor 90 is responsible for compressing the air and providing the required air flow power. Each air compressor 90 is connected to the monitoring device and other systems through the main air duct 10.

[0073] The air compressor 90 is connected to the main air duct 10 to ensure that a stable air flow pressure can be provided to the monitoring device during operation.

[0074] The train control system 100 is the central control unit of the train, responsible for controlling various devices and functions of the train, including the air compressor 90 and the monitoring device, etc.; the air compressor 90 is connected to the train control system 100, so the working state (such as starting, stopping, adjusting, etc.) of the air compressor 90 is managed by the train control system 100.

[0075] Through the train control system 100, the operation of the air compressor 90 can be coordinated with other systems of the train to ensure that the air supply and pressure control are consistent with the overall operation of the train.

[0076] The train control system 100 is connected to the signal output port 70 through a hard wire or a wireless communication module. A hard wire refers to a traditional wired connection method, while the wireless communication module realizes the connection with the signal output port 70 through a wireless network or signal transmission.

[0077] The signal output port 70 is used to output data or alarm signals from the monitoring device; when the main air quality monitoring device detects an abnormality (such as the air quality not meeting the standard), it will transmit the data to the train control system 100 through the signal output port 70, thereby triggering an alarm or performing other necessary operations.

[0078] The working process of the main air quality monitoring system for rail vehicles is as follows: When the train is running, the air compressor 90 compresses air, and the air flows through the main air duct 10 to each system to ensure the air flow demand for the train operation.

[0079] Two main air quality monitoring devices are arranged in parallel on the main air duct 10 to monitor the air quality passing through the pipeline in real time; parameters that can be monitored include but are not limited to: temperature and humidity in the air, gas concentration, particulate matter, etc., to ensure that the air quality meets the standards.

[0080] Through the connection with the air compressor 90, the train control system 100 can manage the operation of the air compressor 90 to ensure stable air flow supply; at the same time, the detection results of the monitoring device are fed back to the train control system 100 through the signal output port 70, and the system makes a judgment based on the data and issues an alarm or adjusts the device operation when necessary.

[0081] This application also relates to a method for monitoring the main air quality of a rail vehicle, including: The temperature and humidity sensor 203 collects and detects in real time the temperature and humidity values of the compressed air in the main air duct 10, and sends the collected temperature and humidity values to the control system. The control system compares the temperature and humidity values with the preset temperature and humidity thresholds, and when the temperature and humidity values continuously exceed the standard within a preset time, an alarm signal is output to the train control system 100; The volatile gas concentration sensor 304 collects in real time and detects the oil and gas value of the compressed air in the main air duct 10 according to a preset cycle, and sends the collected oil and gas value to the control system. The control system compares the oil and gas value with the preset oil and gas threshold, and when the oil and gas value continuously exceeds the standard within several cycles, an alarm signal is output to the train control system 100; The dust particle counter 405 collects in real time and detects the number of particles of the compressed air in the main air duct 10 according to a preset cycle, and sends the collected number of particles to the control system. The control system compares the number of particles with the preset particle number threshold, and when the number of particles exceeds the standard, an alarm signal is output to the train control system 100; Wherein, when the control system receives at least one alarm signal, the control system issues a control instruction to control the air compressor 90 to stop running and marks it as a failure.

[0082] The monitoring system realizes the real-time monitoring of the quality of the compressed air in the main air duct 10 through three sensors (temperature and humidity sensor 203, volatile gas concentration sensor 304 and dust particle counter 405); the system compares each air quality parameter with the preset threshold, and if it exceeds the standard, an alarm signal will be sent to the train control system 100; after receiving the alarm, the control system will issue a control instruction to stop the operation of the air compressor 90 and mark the air compressor 90 as a failure.

[0083] Further, when the single-end air compressor 90 is working and the monitoring device receives an alarm, the monitoring device sends a switching request for the air compressor 90 to the train control system 100. The train control system 100 issues a control instruction to control the current air compressor 90 to stop and marks it as a failure, and at the same time starts the standby air compressor 90; or, When two air compressors 90 are working simultaneously, the train control system 100 analyzes the faulty air compressor 90 based on the data differences of the two monitoring devices, and marks and deactivates the faulty air compressor 90 after the air pressure reaches the standard. It can be understood that good control effects can be achieved, and corresponding countermeasures can be implemented.

[0084] The following embodiments are used for further explanation: 1. As Figure 2As shown in the figure, two monitoring devices are respectively connected in parallel to the main air duct (MRP) downstream of two air compressors (ASU1 and ASU2) through two interfaces each (P1, P2 and P3, P4), and each device is connected to the train control system (TCMS) by hard wire or network through the signal output port (SP).

[0085] 2. During operation, the compressed air output by ASU1 (or ASU2) enters the device through P1 (or P3).

[0086] 3. As Figure 1 shown in the figure, the air entering the device through P1 generates three shunts after passing through the cut-off cock BCV with side discharge: The air passing through the temperature and humidity monitoring branch flows through the temperature and humidity sensor THS and then through the cut-off cock BC and finally returns to the MRP through P2. This branch is in a normally open state; if the remote air compressor is started, due to the air flow direction, the air flow direction of this branch is P2 - cut-off cock BC - temperature and humidity sensor THS - cut-off cock BCV with side discharge - P1.

[0087] The air shunted from the temperature and humidity monitoring branch is shunted into an oil and gas monitoring branch and a particle monitoring branch after passing through the check valve CV. The air in the oil and gas detection branch passes through the pressure regulating valve PRV1 in the oil and gas branch, the choke SC1 in the oil and gas branch, the test interface TP1 in the oil and gas branch, the volatile gas concentration sensor VGS and the exhaust solenoid valve MV and is finally discharged to the outside through the silencing exhaust port EXP; the air in the particle detection branch passes through the pressure regulating valve PRV2 in the particle branch, the choke SC2 in the particle branch, the test interface TP2 in the particle branch, the flow valve FV and the dust particle counter DPC and then converges with the oil and gas detection branch and is discharged to the outside through the silencing exhaust port EXP.

[0088] The check valve CV is set to prevent the damage of components such as sensors caused by the gas backflow due to abnormal external pressure; the pressure regulating valve PRV1 in the oil and gas branch and the pressure regulating valve PRV2 in the particle branch are respectively used to adjust the main air pressure to the allowable pressure of the volatile gas concentration sensor VGS and the dust particle counter DPC; the chokes SC1 in the oil and gas branch and SC2 in the particle branch are set to stabilize the air flow and reduce the pressure fluctuation; the test interfaces TP1 in the oil and gas branch and TP2 in the particle branch are respectively used for the calibration of the pressure regulating valve PRV1 in the oil and gas branch and the pressure regulating valve PRV2 in the particle branch; the flow valve FV is used to limit the air flow through the dust particle counter DPC; the cut-off cock BCV with side discharge and the cut-off cock BC are used for device isolation.

[0089] The temperature and humidity sensor THS detects the temperature and humidity of the air in real time and online. When the vehicle uses air, the flow of the main air will drive the air to pass through the detection surface of the temperature and humidity sensor THS at the same time. The device records the current data value and sends it to the TCMS. When it detects that the temperature and humidity indicators of the air exceed the limit and last for a certain period of time, the device outputs an alarm signal to the TCMS.

[0090] The volatile gas concentration sensor VGS detects at a certain period. At the beginning of each detection period, the exhaust solenoid valve MV is energized and conducts, and the depressurized air flows through the detection surface of the volatile gas concentration sensor VGS. The device records the current data value and sends it to the TCMS. When it detects that the oil and gas indicators exceed the limit for several periods, the device outputs an alarm signal to the TCMS.

[0091] The dust particle counter DPC detects at a certain period. At the beginning of each detection period, the flow valve FV is energized and conducts, and allows a fixed amount of depressurized air to flow through the dust particle counter DPC. The dust particle counter DPC counts the particles in the flowing air. After a single detection period is completed, the device records the data value of this period and sends it to the TCMS. If the indicator exceeds the limit (especially when large particle impurities are detected), the device outputs an alarm signal to the TCMS.

[0092] After one or several of the temperature and humidity sensor THS, the volatile gas concentration sensor VGS, and the dust particle counter DPC output an alarm signal to the vehicle, the vehicle determines whether to switch to the standby air compressor according to the received data indicators.

[0093] When the equipment needs to be repaired or isolated, operate the cut-off cock BC and the cut-off cock BCV with side exhaust successively to isolate the equipment from the main air pipeline and drain the residual compressed air in the equipment.

[0094] The present invention also has the following beneficial effects: 1. The temperature and humidity of the main air can be monitored online, and the passed gas can flow back to the main air pipeline to avoid air consumption; 2. The oil and gas and particle size of the main air can be detected periodically. By adjusting the working period and gas flow, the air consumption can be reduced; 3. It is provided with a silencing exhaust port to reduce the noise generated when the detected gas is discharged; 4. It is provided with a set of isolation cocks, which can quickly drain the residual compressed air in the equipment and isolate the equipment from the vehicle main air pipeline when the equipment fails or is repaired; 5. The three core sensors are arranged on three independent branches, with independent functions and can be replaced or selected separately; 6. The equipment is set near the air compressor, and can quickly detect the pollution caused by the air compressor failure.

[0095] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub - combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A total wind quality monitoring device for rail vehicles, characterized in that: include: a main air duct (10); a temperature and humidity monitoring branch (20), the two ends of which are respectively connected to the main air duct (10), and are arranged in parallel with the main air duct (10) for real-time online detection of air temperature and humidity; a gas concentration monitoring branch (30), one end of which is connected to the air inlet of the temperature and humidity monitoring branch (20), and the other end of which is provided with an exhaust port (80), for monitoring the oil and gas index according to a preset period and issuing a corresponding warning signal according to the oil and gas index threshold; and a particle monitoring branch (40), one end of which is connected to the air inlet of the gas concentration monitoring branch (30) and the other end of which is connected to the front end of the exhaust port (80), and is used to monitor particles in the air according to a preset period and issue a corresponding warning signal according to a particle threshold; Wherein, by independently arranging a temperature and humidity monitoring branch (20) on the main air duct (10), independently arranging a gas concentration monitoring branch (30) on the temperature and humidity monitoring branch (20), and independently arranging a particle monitoring branch (40) on the gas concentration monitoring branch (30), the air quality in the main air duct (10) can be monitored independently.

2. The total wind quality monitoring device for rail vehicles according to claim 1, characterized in that: The temperature and humidity monitoring branch (20) is connected to the main air duct (10) via a plurality of first interfaces (50); The number of the plurality of first interfaces (50) is two, and the two first interfaces (50) are respectively an air inlet interface and an air outlet interface.

3. The total wind quality monitoring device for rail vehicles according to claim 2, characterized in that: The temperature and humidity monitoring branch (20) comprises: a first pipeline (201) whose two ends are respectively connected to the first interface (50); a cut-off valve (202) with a side row, a temperature and humidity sensor (203) and a cut-off valve (204) are respectively arranged in sequence on the first pipeline (201) along a preset direction.

4. The total wind quality monitoring device for rail vehicles according to claim 3, characterized in that: A check valve (60) is also provided between the temperature and humidity monitoring branch (20) and the gas concentration monitoring branch (30); one end of the check valve (60) is provided between the shut-off valve with side discharge (202) and the temperature and humidity sensor (203), and the other end is provided at the air inlet of the gas concentration monitoring branch (30).

5. The total wind quality monitoring device for rail vehicles according to claim 4, characterized in that: The gas concentration monitoring branch (30) comprises: a second pipeline (301) having two ends respectively connected to the check valve (60) and the exhaust port (80); an oil and gas branch pressure regulating valve (302), an oil and gas branch shrink plug (303), a volatile gas concentration sensor (304) and an exhaust solenoid valve (305) are respectively arranged on the second pipeline (301) in sequence along the preset direction.

6. The total wind quality monitoring device for rail vehicles according to claim 5, characterized in that: An oil and gas branch circuit test interface (306) is provided between the oil and gas branch circuit plug (303) and the volatile gas concentration sensor (304).

7. The total wind quality monitoring device for rail vehicles according to claim 5, characterized in that: The particle monitoring branch (40) comprises: a third pipeline (401) having one end arranged between the check valve (60) and the oil and gas branch pressure regulating valve (302) and the other end arranged between the exhaust solenoid valve (305) and the exhaust port (80); the third pipeline (401) is provided with a particle branch pressure regulating valve (402), a particle branch shrink plug (403), a flow valve (404) and a dust particle counter (405) in sequence along the preset direction.

8. The total wind quality monitoring device for rail vehicles according to claim 7, characterized in that: A particle branch test interface (406) is provided between the particle branch shrink plug (403) and the flow valve (404).

9. The total wind quality monitoring device for rail vehicles according to claim 1, characterized in that: Also includes: A signal output port (70), wherein the signal output port (70) is electrically connected to the temperature and humidity monitoring branch (20), the gas concentration monitoring branch (30) and the particle monitoring branch (40) respectively.

10. A total wind quality monitoring system for rail vehicles, characterized in that: A total wind quality monitoring device for a rail vehicle comprising any one of claims 1 to 9; The number of the rail vehicle total air quality monitoring devices is two, and the two rail vehicle total air quality monitoring devices are respectively connected in parallel to the main air duct (10); The main air duct (10) is respectively connected to the two air compressors (90); The air compressor (90) is connected to a train control system (100), and the train control system (100) is connected to a signal output port (70) via a hard line or a wireless communication module.

11. A method for monitoring total air quality for rail vehicles, characterized in that: include: The temperature and humidity sensor (203) collects and detects the temperature and humidity values ​​of the compressed air in the main air duct (10) in real time online, and sends the collected temperature and humidity values ​​to the control system. The control system compares the temperature and humidity values ​​with preset temperature and humidity thresholds, and when the temperature and humidity values ​​continue to exceed the threshold within a preset time, an alarm signal is output to the train control system (100); The volatile gas concentration sensor (304) collects the oil and gas value of the compressed air in the main air duct (10) in real time online and detects it according to a preset period, and sends the collected oil and gas value to the control system. The control system compares the oil and gas value with a preset oil and gas threshold value, and when the oil and gas value exceeds the standard continuously for several periods, an alarm signal is output to the train control system (100); The dust particle counter (405) collects the number of particles in the compressed air in the main air duct (10) in real time online and detects the number of particles in accordance with a preset period, and sends the collected number of particles to the control system, the control system compares the number of particles with a preset particle number threshold, and when the number of particles exceeds the threshold, outputs an alarm signal to the train control system (100); When the control system receives at least one alarm signal, the control system issues a control instruction to control the air compressor (90) to stop running and mark it as a fault.

12. The method for monitoring total wind quality for rail vehicles according to claim 11, characterized in that: When a single-ended air compressor (90) is operating and the monitoring device receives an alarm, the monitoring device sends an air compressor (90) switching request to the train control system (100), and the train control system (100) issues a control instruction to stop the current air compressor (90) and mark it as a fault, and simultaneously starts the hot standby air compressor (90); or, When the two air compressors (90) are working at the same time, the train control system (100) analyzes the faulty air compressor (90) based on the data difference between the two monitoring devices, and marks the air compressor (90) as faulty and stops using it after the air pressure reaches the standard.

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