Air supply control and total air pipeline monitoring integrated device and monitoring control method

Abstract

The application is a kind of air supply control and total air pipe monitoring integrated equipment and monitoring control method, which is installed in the equipment cabin of motor train unit, comprising an air supply control part, including a filter, the filter is connected with air spring air supply gas path and brake control module air supply gas path; a total air pipe monitoring part, including a total air pressure sensor and a double-channel pressure switch, the double-channel pressure switch is connected in series on the air compressor starting hard-wired loop, a switch control loop is connected on the double-channel pressure switch, a loop pressure sensor is arranged between the double-channel pressure switch and the switch control loop; the switch control loop eliminates the equipment failure caused by pressure switch setting value drift by adjusting pressure. The application integrates the air supply control part and the total air pipe monitoring part, and the equipment is integrated and miniaturized; the switch control loop is connected on the double-channel pressure switch, the equipment failure caused by pressure switch setting value drift is eliminated by adjusting the pressure of the switch control loop, and the driving safety is improved.

Description

Technical Field

[0001] This invention relates to the field of rail transit equipment technology, and in particular to an integrated device and method for air supply control and main air duct monitoring. Background Technology

[0002] The air supply control equipment and main air duct monitoring equipment for the braking and air spring systems of rail transit vehicles are generally installed inside the braking control device in the form of pneumatic modules. While existing air supply equipment and main air duct monitoring equipment may have some variations in pneumatic circuit principles due to differences in vehicle configuration and control units, their overall functions are basically the same. However, based on the current on-site commissioning and operation of the EMU, this equipment design and installation method, as well as its control logic, still have some drawbacks: 1. The two sets of modules contain adjustable and manually controlled pneumatic valves such as overflow valves, pressure reducing valves, plug valves, and pressure switches. These are installed inside the brake control device housing, which is quite deep, making it difficult for on-site personnel to operate; 2. The two sets of modules are installed inside the brake control device housing via a pneumatic circuit board, occupying a large amount of housing space, resulting in a large projected area and mass; 3. The control logic and pneumatic circuit principle for pipeline pressure do not take into account the error characteristics of the pressure switch. Since the pressure switch is installed in a hard-wired loop, once the pressure switch set value drifts beyond the specified limit of ±15%, it is very easy to trigger faults such as continuous air supply from the air compressor, insufficient air supply, or failure to restore traction lockout (depending on the different hard-wired loops connected in series with the pressure switch, it can control the start and stop of the air compressor and the start and stop of traction lockout).

[0003] Therefore, based on years of experience and practice in related industries, the inventor proposes an integrated device and monitoring and control method for air supply control and main air duct monitoring to overcome the shortcomings of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated device and method for air supply control and main air duct monitoring. It integrates an air supply control unit and a main air duct monitoring unit, making the device integrated and miniaturized. The entire device is compact, saving equipment compartment space and reducing vehicle weight. The dual-channel pressure switch is connected to the switch control circuit. By adjusting the pressure of the switch control circuit, the device malfunction caused by pressure switch setpoint drift can be eliminated, thereby improving driving safety.

[0005] The objective of this invention is achieved by providing an integrated device for air supply control and main air duct monitoring, installed in the equipment compartment of a high-speed train, comprising:

[0006] An air supply control unit includes a filter, on which a spring-loaded air supply circuit and a brake control module air supply circuit are connected in parallel.

[0007] The main air duct monitoring unit includes a main air pressure sensor and a dual-channel pressure switch. The main air pressure sensor is used for monitoring the pressure of the main air duct. The dual-channel pressure switch is connected in series in the air compressor start-up hard-wire loop and is a main air pressure switch. A switch control circuit is connected to the dual-channel pressure switch, and a loop pressure sensor is installed between the dual-channel pressure switch and the switch control circuit. The switch control circuit eliminates equipment failures caused by pressure switch setpoint drift by adjusting the pressure.

[0008] In a preferred embodiment of the present invention, the switch control circuit includes a first branch and a second branch connected in parallel from the switch air inlet. The first branch is provided with a first air-charging solenoid valve and a first relief solenoid valve, and the second branch is provided with a second air-charging solenoid valve, a second relief solenoid valve, and a pressure boosting valve. The first air-charging solenoid valve and the first relief solenoid valve control the pressure of the switch control circuit based on the pressure values ​​collected by the total air pressure sensor and the loop pressure sensor. The pressure boosting valve includes a set of large pistons and small pistons. The large pistons squeeze towards the small pistons to increase the loop pressure. The second air-charging solenoid valve and the second relief solenoid valve are used for pressure control at the large piston end of the pressure boosting valve.

[0009] In a preferred embodiment of the present invention, a first stop valve, an overflow valve, and a pressure reducing valve are provided on the air supply line of the air spring, and a second stop valve and a check valve are provided on the air supply line of the brake control module.

[0010] In a preferred embodiment of the present invention, a first pressure measuring point and a second pressure measuring point are provided on the air supply line of the air spring, the first pressure measuring point is located upstream of the overflow valve, and the second pressure measuring point is located downstream of the pressure reducing valve.

[0011] The main air duct monitoring unit is equipped with a third pressure measuring point, a fourth pressure measuring point and a fifth pressure measuring point. The third pressure measuring point is located at the main air pressure sensor, the fourth pressure measuring point is located at the loop pressure sensor, and the fifth pressure measuring point is located at the switch air inlet.

[0012] In a preferred embodiment of the present invention, the device includes a housing with a detachable cover on one side; a brazed valve body is connected to the other side of the housing, and the brazed valve body integrates the overflow valve, the pressure reducing valve, the total air pressure sensor, the dual-channel pressure switch, the loop pressure sensor, the first air-filling solenoid valve, the first relief solenoid valve, the booster valve, the second air-filling solenoid valve, and the second relief solenoid valve; a first pressure measuring point, a second pressure measuring point, a third pressure measuring point, a fourth pressure measuring point, and a fifth pressure measuring point are provided on the outer side of the side wall of the housing, and the first plug and the second plug pass through the side wall of the housing; a multi-pin connector socket is provided on the side wall of the housing.

[0013] In a preferred embodiment of the present invention, a first handle is provided at the end of the first plug, and a second handle is provided at the end of the second plug, with the first handle and the second handle located on the outside of the housing.

[0014] In a preferred embodiment of the present invention, a rubber pad is provided inside the box.

[0015] The objective of this invention can also be achieved as follows: a method for controlling air supply and monitoring the main air duct includes supplying air to the air spring and the brake control module respectively through the air supply air path of the aforementioned air supply control unit and the air supply air path of the brake control module; the aforementioned dual-channel pressure switch is connected in series in the air compressor start-up hard-wire loop, and a switch control circuit is connected to the dual-channel pressure switch; the switch control circuit performs pressure control based on the pressure values ​​collected by the main air pressure sensor and the loop pressure sensor, thereby eliminating equipment failures caused by pressure switch setpoint drift.

[0016] In a preferred embodiment of the present invention, when the upper limit of the dual-channel pressure switch drifts downward, a fault of insufficient air supply to the air compressor is triggered; the first charging solenoid valve is cut off, the first relief solenoid valve exhausts air, and the pressure of the switch control circuit is controlled below 750 kPa through the pressure feedback of the loop pressure sensor, so that the air compressor can supply air; when the total air pressure sensor detects that the total air pressure reaches above 950 kPa, the first charging solenoid valve is connected, and when the pressure of the switch control circuit reaches above 950 kPa, the air supply to the air compressor stops.

[0017] In a preferred embodiment of the present invention, when the upper limit value of the dual-channel pressure switch drifts upward, a fault of continuous air supply to the air compressor is triggered; the first air supply solenoid valve is controlled to cut off, and at the same time the second air supply solenoid valve upstream of the booster valve is controlled to supply air, so that the booster valve increases the pressure of the switch control circuit. When the pressure of the switch control circuit exceeds the upper limit drift value of the dual-channel pressure switch, the air supply to the air compressor stops.

[0018] As described above, the integrated equipment and monitoring and control method for air supply control and main air duct monitoring of the present invention have the following beneficial effects:

[0019] The air supply control and main air duct monitoring integrated device of the present invention integrates the air supply control unit and the main air duct monitoring unit. The device is integrated and miniaturized, with a small overall size, saving equipment compartment space and reducing vehicle weight. The dual-channel pressure switch is connected to the switch control circuit. The pressure of the switch control circuit is controlled and adjusted through valve components such as the air charging solenoid valve, the relief solenoid valve, the pressure boosting valve, and the loop pressure sensor, eliminating equipment failure caused by pressure switch setpoint drift and improving driving safety.

[0020] This invention is installed in the equipment compartment of the EMU. The valve handle and pressure measuring point are exposed for easy operation. The box body and the box cover are two-piece. The box cover is easy to disassemble. The inside contains various valves. The overflow valve, pressure reducing valve and dual-channel pressure switch are adjustable valves, which are easy to operate when adjusting the value. The whole device is small in size, saves equipment compartment space and reduces the undercarriage weight.

[0021] The monitoring and control method of the present invention is easy to operate, and the pressure adjustment is rapid and accurate, which helps to improve the level of intelligence and enhance driving safety. Attached Figure Description

[0022] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the invention.

[0023] in:

[0024] Figure 1 : This is a schematic diagram of the integrated air supply control and main air duct monitoring device of the present invention.

[0025] Figure 2 : This is an internal structural diagram of the integrated air supply control and main air duct monitoring device of the present invention.

[0026] Figure 3 : This is an external view of the integrated air supply control and main air duct monitoring device of the present invention.

[0027] In the picture:

[0028] 101. Air supply circuit for air springs; 102. Air supply circuit for brake control module;

[0029] 1. Cover; 2. Body; 3. Brazed valve body; 4. Multi-pin connector socket; 5. Overflow valve; 6. Pressure reducing valve; 7. Loop pressure sensor; 8. Dual-channel pressure switch; 9. First air-filling solenoid valve; 10. First release solenoid valve; 11. Second air-filling solenoid valve; 12. Second release solenoid valve; 13. Total air pressure sensor; 14. Pressure boosting valve; 15. Second pressure measuring point; 16. First stop valve; 17. Second stop valve; 18. First pressure measuring point; 19. Fourth pressure measuring point; 20. Third pressure measuring point; 21. Fifth pressure measuring point. Detailed Implementation

[0030] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0031] The specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on the invention, all of which should be considered within the scope of the invention. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "linked" should be interpreted broadly; for example, they can refer to mechanical or electrical connections, or internal communication between two elements, and can be direct or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] like Figure 1 , Figure 2 , Figure 3 As shown, this invention provides an integrated device for air supply control and main air duct monitoring, installed in the equipment compartment of a high-speed train, comprising:

[0034] The air supply control unit includes a filter, and the air supply circuit of the air spring and the air supply circuit of the brake control module are connected in parallel on the filter.

[0035] The main air duct monitoring unit includes a main air pressure sensor 13 and a dual-channel pressure switch 8. The main air pressure sensor 13 is used for monitoring the pressure of the main air duct. The dual-channel pressure switch 8 is connected in series to the air compressor start-up hard-wired loop (in the prior art, the start-up and shutdown of the air compressor are controlled by the on / off signal fed back by the dual-channel pressure switch, which is an electrical signal). The dual-channel pressure switch 8 is a main air pressure switch (a regulating valve). A switch control circuit is connected to the dual-channel pressure switch 8 (controlling the air circuit pressure of the dual-channel pressure switch through air circuit signal control). A loop pressure sensor 7 is installed between the dual-channel pressure switch 8 and the switch control circuit. The loop pressure sensor 7 is used to monitor the pressure of the switch control circuit. The switch control circuit is located upstream of the dual-channel pressure switch 8. The switch control circuit eliminates equipment failures caused by pressure switch setpoint drift by adjusting the pressure.

[0036] The air supply control and main air duct monitoring integrated device of the present invention integrates the air supply control unit and the main air duct monitoring unit. The device is integrated and miniaturized, with a small overall size, saving equipment compartment space and reducing vehicle weight. The dual-channel pressure switch is connected to the switch control circuit. By adjusting the pressure of the switch control circuit, the device malfunction caused by pressure switch setpoint drift is eliminated, thereby improving driving safety.

[0037] Furthermore, such as Figure 1 As shown, the switch control circuit includes a first branch and a second branch connected in parallel from the switch air inlet, forming a closed loop. The first branch is equipped with a first charging solenoid valve 9 and a first releasing solenoid valve 10, while the second branch is equipped with a second charging solenoid valve 11, a second releasing solenoid valve 12, and a pressure boosting valve 14. The first charging solenoid valve 9 and the first releasing solenoid valve 10 control the pressure of the switch control circuit based on pressure values ​​collected by the total air pressure sensor and the loop pressure sensor. The pressure boosting valve 14 includes a large piston and a small piston; the large piston pushes towards the small piston to increase the loop pressure. The second charging solenoid valve 11 and the second releasing solenoid valve 12 control the pressure at the large piston end of the pressure boosting valve 14. The first charging solenoid valve 9, the first releasing solenoid valve 10, the second charging solenoid valve 11, and the second releasing solenoid valve 12 are controlled in a closed loop via the EBCU based on the values ​​collected by the loop pressure sensor and the total air pressure sensor.

[0038] In this embodiment, the first air-filling solenoid valve 9 and the second air-filling solenoid valve 11 are two-position two-way solenoid valves, and the first release solenoid valve 10 and the second release solenoid valve 12 are two-position three-way solenoid valves.

[0039] Existing technology does not take into account the drift of the pressure switch in the air circuit design. Since the pressure switch is connected in series in the air compressor start-up hard-wire loop, once the upper limit value of the pressure switch drifts, it will trigger non-resettable "dead" faults such as the air compressor not making air supply, not making air supply in place, or not restoring traction blockage. In severe cases, it will endanger driving safety.

[0040] In this invention, the control circuit of the dual-channel pressure switch is equipped with valve components such as a first air-charging solenoid valve 9, a first relief solenoid valve 10 (exhaust valve), a second air-charging solenoid valve 11, a second relief solenoid valve 12 (exhaust valve), a booster valve 14, and a loop pressure sensor to control the air pressure and eliminate equipment failures caused by pressure switch setpoint drift.

[0041] Furthermore, such as Figure 1 As shown, a first stop valve 16, an overflow valve 5 (which is an adjustment valve), and a pressure reducing valve 6 (which is an adjustment valve) are installed on the air supply line of the air spring, and a second stop valve 17 and a check valve are installed on the air supply line of the brake control module.

[0042] The relief valve 5 provides a spring pressure greater than 670 kPa downstream. If the pressure is less than 670 kPa, the relief valve 5 is closed to ensure air supply for braking. The pressure reducing valve 6 provides a spring pressure less than 700 kPa downstream, protecting the spring.

[0043] The first stop valve 16 is a manual stop valve used for controlling the cutoff of the air supply path via the air spring. The second stop valve 17 is an electrically powered stop valve used for controlling the cutoff of the air supply path via the brake control module.

[0044] Furthermore, such as Figure 1 As shown, a first pressure measuring point 18 and a second pressure measuring point 15 are set on the air supply line of the air spring. The first pressure measuring point 18 is set upstream of the overflow valve 5 and is a manual pressure measuring point upstream of the overflow valve 5; the second pressure measuring point 15 is set downstream of the pressure reducing valve 6 and is a manual pressure measuring point downstream of the pressure reducing valve 6.

[0045] The main air duct monitoring unit is equipped with a third pressure measuring point 20, a fourth pressure measuring point 19, and a fifth pressure measuring point 21. The third pressure measuring point 20 is located at the main air pressure sensor 13 and is a manual measuring point for the main air duct pressure. The fourth pressure measuring point 19 is located at the loop pressure sensor 7 and is a manual measuring point for the loop pressure. The fifth pressure measuring point 21 is located at the air inlet of the dual-channel pressure switch, that is, upstream of the first air charging solenoid valve 9, and is a manual measuring point for the air inlet pressure of the dual-channel pressure switch 8.

[0046] Furthermore, such as Figure 2 , Figure 3As shown, the integrated equipment for air supply control and main air duct monitoring includes a housing 2, with a detachable cover 1 on one side of the housing 2. The housing 2 serves to protect the components, and the cover 1 also serves to protect them. It can be removed for valve adjustment during debugging or maintenance. The other side of the housing 2 is connected to a brazed valve body 3, which integrates an overflow valve 5, a pressure reducing valve 6, a main air pressure sensor 13, a dual-channel pressure switch 8, a loop pressure sensor 7, a first air-charging solenoid valve 9, a first relief solenoid valve 10, a booster valve 14, a second air-charging solenoid valve 11, and a second relief solenoid valve 12. The outer side wall of the housing 2 is provided with a first pressure measuring point 18, a second pressure measuring point 15, a third pressure measuring point 20, a fourth pressure measuring point 19, and a fifth pressure measuring point 21. A first plug 16 and a second plug 17 pass through the side wall of the housing. A multi-pin connector socket 4 passes through the side wall of the housing, which connects all electrical cables and serves as an external interface.

[0047] In this embodiment, the cover 1 and the body 2 are connected to the brazed valve body 3 by screws, and a rubber gasket is installed inside the body for protection.

[0048] Furthermore, a first handle is provided at the end of the first plug 16, and a second handle is provided at the end of the second plug 17. The first handle and the second handle are located on the outside of the housing.

[0049] Turning the first handle on the outside of the housing adjusts the on / off state of the first plug 16, which is used for the air spring supply air path cut-off control; turning the second handle on the outside of the housing generates an electrical signal for the second plug 17, which is used for the brake control module supply air path cut-off control.

[0050] In the existing technology, the two sets of modules include adjustable and manually controlled pneumatic valves such as relief valves, pressure reducing valves, plug valves and pressure switches. The brake control device housing is also relatively deep, which is not conducive to the operation of on-site personnel. The two sets of modules are installed inside the brake control device housing through the air circuit board, which has a large projected area and occupies a lot of housing space and vehicle weight.

[0051] The integrated air supply control and main air duct monitoring equipment provided by this invention is installed in the equipment compartment of the EMU. The valve handles (first handle and second handle) and pressure measuring points (first pressure measuring point 18, second pressure measuring point 15, third pressure measuring point 20, fourth pressure measuring point 19 and fifth pressure measuring point 21) are all exposed for easy operation. The box body and box cover are two-piece, and the box cover is easy to disassemble. The interior contains various valves, and the overflow valve, pressure reducing valve and dual-channel pressure switch are adjustable valves, which are easy to operate when adjusting the value. The whole equipment is small in size, saves equipment compartment space, and reduces the weight under the car.

[0052] The present invention also provides a method for air supply control and main air duct monitoring and control, comprising supplying air to the air spring and the brake control module respectively through the air supply air path of the aforementioned air supply control unit and the air supply air path of the brake control module; the aforementioned dual-channel pressure switch 8 is connected in series in the air compressor start hard-wire loop, and the dual-channel pressure switch 8 is connected to a switch control circuit, which performs pressure control based on the pressure values ​​collected by the main air pressure sensor and the loop pressure sensor to eliminate equipment failure caused by pressure switch set value drift.

[0053] When the upper limit of the dual-channel pressure switch 8 drifts downward, it triggers a fault of insufficient air supply to the air compressor; the first charging solenoid valve 9 is cut off, the first relief solenoid valve 10 exhausts air, and the pressure feedback of the loop pressure sensor controls the pressure of the switch control circuit below 750 kPa, so that the air compressor can supply air; when the total air pressure sensor detects that the total air pressure reaches above 950 kPa, it connects the first charging solenoid valve 9, and when the pressure of the switch control circuit reaches above 950 kPa, the air supply to the air compressor stops.

[0054] When the upper limit of the dual-channel pressure switch 8 drifts upward, it triggers the air compressor's continuous air supply fault; it controls the first air supply solenoid valve 9 to cut off, and at the same time controls the second air supply solenoid valve 11 upstream of the booster valve to supply air, so that the booster valve increases the pressure of the switch control circuit. When the pressure of the switch control circuit exceeds the upper limit drift value of the dual-channel pressure switch, the air compressor's air supply stops.

[0055] When the limit value of the dual-channel pressure switch 8 drifts upward, it will cause the air compressor to supply air prematurely (which has no serious impact on the system), so it is not considered.

[0056] When the lower limit of the dual-channel pressure switch 8 drifts downward, the air compressor can be started via signal control through pressure feedback from the main air pressure sensor 13, so this is not considered. The traction blocking pressure switch is essentially the same as the main air pressure switch, except for its set value. The traction blocking pressure switch has a set value of 600 / 700, and its control function also involves starting and stopping the air compressor by detecting the main air duct pressure through the dual-channel pressure switch. To achieve the traction blocking function, the monitoring and control logic of the dual-channel pressure switches is essentially the same, except for the set value.

[0057] As described above, the integrated equipment and monitoring and control method for air supply control and main air duct monitoring of the present invention have the following beneficial effects:

[0058] The air supply control and main air duct monitoring integrated device of the present invention integrates the air supply control unit and the main air duct monitoring unit. The device is integrated and miniaturized, with a small overall size, saving equipment compartment space and reducing vehicle weight. The dual-channel pressure switch is connected to the switch control circuit. The pressure of the switch control circuit is controlled and adjusted through valve components such as the air charging solenoid valve, the relief solenoid valve, the pressure boosting valve, and the loop pressure sensor, eliminating equipment failure caused by pressure switch setpoint drift and improving driving safety.

[0059] This invention is installed in the equipment compartment of the EMU. The valve handle and pressure measuring point are exposed for easy operation. The box body and the box cover are two-piece. The box cover is easy to disassemble. The inside contains various valves. The overflow valve, pressure reducing valve and dual-channel pressure switch are adjustable valves, which are easy to operate when adjusting the value. The whole device is small in size, saves equipment compartment space and reduces the undercarriage weight.

[0060] The monitoring and control method of the present invention is easy to operate, and the pressure adjustment is rapid and accurate, which helps to improve the level of intelligence and enhance driving safety.

[0061] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. An integrated device for air supply control and main air duct monitoring, installed in the equipment compartment of a high-speed train, characterized in that, include, An air supply control unit includes a filter, on which a spring-loaded air supply circuit and a brake control module air supply circuit are connected in parallel. The main air duct monitoring unit includes a main air pressure sensor and a dual-channel pressure switch. The main air pressure sensor is used for monitoring the pressure of the main air duct. The dual-channel pressure switch is connected in series in the air compressor start-up hard-wired loop and serves as the main air pressure switch. A switch control circuit is connected to the dual-channel pressure switch, and a loop pressure sensor is installed between the dual-channel pressure switch and the switch control circuit. The switch control circuit eliminates equipment malfunctions caused by pressure switch setpoint drift by adjusting the pressure. The switch control circuit includes a first branch and a second branch connected in parallel from the switch air inlet, forming a closed loop. A first charging solenoid valve and a first releasing solenoid valve are installed on the first branch, while a second charging solenoid valve, a second releasing solenoid valve, and a booster valve are installed on the second branch. The first charging solenoid valve and the first releasing solenoid valve control the pressure of the switch control circuit based on pressure values ​​collected by the total air pressure sensor and the loop pressure sensor. The booster valve includes a large piston and a small piston, with the large piston pressing against the small piston to increase the loop pressure. The second charging solenoid valve and the second releasing solenoid valve control the pressure at the large piston end of the booster valve. The first charging solenoid valve, the first releasing solenoid valve, the second charging solenoid valve, and the second releasing solenoid valve are controlled in a closed loop via the EBCU based on values ​​collected by the loop pressure sensor and the total air pressure sensor. The air supply line for the air spring is equipped with a first stop valve, an overflow valve, and a pressure reducing valve. The air supply line for the brake control module is equipped with a second stop valve and a check valve. The overflow valve provides the downstream air spring with a pressure greater than 670 kPa. If the pressure is less than 670 kPa, the overflow valve is closed to ensure air supply for braking. The pressure reducing valve provides the downstream air spring with a pressure less than 700 kPa, which protects the air spring. The first stop valve is a manual stop valve used for cutting off the air supply line for the air spring. The second stop valve is an energized stop valve used for cutting off the air supply line for the brake control module.

2. The integrated equipment for air supply control and main air duct monitoring as described in claim 1, characterized in that, A first pressure measuring point and a second pressure measuring point are provided on the air supply line of the air spring. The first pressure measuring point is located upstream of the overflow valve, and the second pressure measuring point is located downstream of the pressure reducing valve. The main air duct monitoring unit is equipped with a third pressure measuring point, a fourth pressure measuring point and a fifth pressure measuring point. The third pressure measuring point is located at the main air pressure sensor, the fourth pressure measuring point is located at the loop pressure sensor, and the fifth pressure measuring point is located at the switch air inlet.

3. The integrated equipment for air supply control and main air duct monitoring as described in claim 2, characterized in that, The device includes a housing with a detachable cover on one side; a brazed valve body is connected to the other side of the housing, and the brazed valve body integrates the overflow valve, the pressure reducing valve, the total air pressure sensor, the dual-channel pressure switch, the loop pressure sensor, the first air-filling solenoid valve, the first relief solenoid valve, the booster valve, the second air-filling solenoid valve, and the second relief solenoid valve; the outer side wall of the housing is provided with the first pressure measuring point, the second pressure measuring point, the third pressure measuring point, the fourth pressure measuring point, and the fifth pressure measuring point, and the first and second plugs pass through the side wall of the housing; a multi-pin connector socket is provided on the side wall of the housing.

4. The integrated equipment for air supply control and main air duct monitoring as described in claim 3, characterized in that, A first handle is provided at the end of the first plug, and a second handle is provided at the end of the second plug, with the first handle and the second handle located on the outside of the housing.

5. The integrated equipment for air supply control and main air duct monitoring as described in claim 3, characterized in that, A rubber pad is installed inside the box.

6. A method for controlling air supply and monitoring and controlling the main air duct, characterized in that, The method is implemented using the integrated equipment for air supply control and main air duct monitoring as described in any one of claims 1 to 5; the air supply control and main air duct monitoring method includes supplying air to the air spring and the brake control module respectively through the air supply air circuit of the air supply control unit and the air supply air circuit of the brake control module; a dual-channel pressure switch is connected in series in the air compressor start-up hard-wire loop, and a switch control circuit is connected to the dual-channel pressure switch; the switch control circuit performs pressure control based on the pressure values ​​collected by the main air pressure sensor and the loop pressure sensor to eliminate equipment failure caused by pressure switch setpoint drift.

7. The air supply control and main air duct monitoring and control method as described in claim 6, characterized in that, When the upper limit of the dual-channel pressure switch drifts downward, it triggers a fault of insufficient air supply to the air compressor; the first charging solenoid valve is cut off, the first relief solenoid valve exhausts air, and the pressure feedback of the loop pressure sensor controls the pressure of the switch control circuit below 750 kPa, allowing the air compressor to supply air; when the total air pressure sensor detects that the total air pressure reaches above 950 kPa, it connects the first charging solenoid valve, and when the pressure of the switch control circuit reaches above 950 kPa, the air compressor supply stops.

8. The air supply control and main air duct monitoring and control method as described in claim 6, characterized in that, When the upper limit of the dual-channel pressure switch drifts upward, it triggers a fault that the air compressor cannot supply air continuously. It controls the first air supply solenoid valve to cut off and simultaneously controls the second air supply solenoid valve upstream of the booster valve to supply air, so that the booster valve increases the pressure in the switch control circuit. When the pressure in the switch control circuit exceeds the upper limit drift value of the dual-channel pressure switch, the air compressor supply air stops.

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